WO2014167543A1

WO2014167543A1 - Gel-type cosmetic composition

Info

Publication number: WO2014167543A1
Application number: PCT/IB2014/060658
Authority: WO
Inventors: Elodie VALVERDE; Véronique Ferrari
Original assignee: L'oreal
Priority date: 2013-04-12
Filing date: 2014-04-11
Publication date: 2014-10-16
Also published as: FR3004343A1; FR3004343B1

Abstract

The present invention is directed towards a cosmetic composition for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising: - at least one aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent, the said aqueous phase being present in an amount of at least 30% by weight relative to the total weight of the composition; and - at least one oily phase gelled with at least one lipophilic gelling agent; the said phases forming therein a macroscopically homogeneous mixture; the said composition comprising at least 10% by weight of pigments coated with at least one hydrophobic compound, relative to the total weight of the composition.

Description

"Gel-type cosmetic composition"

The present invention is directed towards proposing for the field of caring for and/or making up keratin materials, especially the skin and/or the lips, and in particular the skin, a novel galenical form that is most particularly advantageous with regard to its technical performance and the sensations it affords the user during its application, in particular to the skin.

The term "keratin materials" especially means the skin, the lips and/or the eyelashes, in particular the skin and/or the lips, and preferably the skin.

Cosmetic compositions, especially foundations, are commonly used to give the skin an aesthetic colour, but also to hide and/or unify imperfections of the skin relief such as wrinkles and/or fine lines and/or scars. In this regard, many solid or fluid, anhydrous or non-anhydrous formulations have been developed to date, namely fluids, creams, compacts, loose powders or sticks.

The present invention more particularly concerns the field of cosmetic galenical formulations of gel/gel type.

Formulations of this type combine a gelled aqueous phase with a gelled oily phase. Thus, formulations of gel/gel type are described in Almeida et al, Pharmaceutical

Development and Technology, 2008, 13 :487, tables 1 and 2, page 488; WO 99/65455; PI 0405758-9; WO 99/62497; JP 2005-112834 and WO 2008/081 175.

For its part, the present invention more particularly concerns the optimization of this type of formulation in terms of immediate visual result on the skin, especially the colour result, especially for makeup purposes and/or for concealing relief imperfections, without, however, impairing its other performance qualities.

Now, a composition with a high content of aqueous phase, which is advantageous with regard to the fresh properties it imparts, does not always ensure uniform distribution of the particulate materials within the composition.

Thus, it may occasionally be difficult to reconcile within a gel/gel formulation, such as that under consideration according to the invention, the presence of a significant amount of water, i.e. generally at least equal to 30% and preferably at least equal to 40% of the total weight of the composition, which is a decisive amount for the manifestation of the freshness effect and of the feeling of lightness, and a large amount of pigments, generally greater than 10% by weight, which is an amount necessary to obtain makeup properties and/or properties of concealing skin imperfections. Thus, it is then possible to observe a lack of homogenization and/or of stability over time of the gel/gel formulation or even a decrease in its coverage properties.

The present invention is directed, precisely, towards proposing a solution for overcoming this difficulty.

Thus, according to one of its aspects, the present invention relates to a cosmetic composition for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising:

- at least one aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent, the said aqueous phase being present in an amount of at least 30% by weight relative to the total weight of the composition; and

- at least one oily phase gelled with at least one lipophilic gelling agent;

the said phases forming therein a macroscopically homogeneous mixture;

the said composition comprising at least 10% by weight of pigments coated with at least one hydrophobic compound, relative to the total weight of the composition.

According to one embodiment variant, a composition according to the invention comprises a gelled aqueous phase in a proportion of at least 40% by weight and preferably of at least 50% by weight, relative to the total weight of the composition.

According to an advantageous embodiment variant, the pigments coated with at least one hydrophobic compound are present totally or partly, and preferably only, in the gelled oily phase.

As stated above, the inventors have found that the choice of a particular hydrophilic gelling agent for texturing the aqueous phase of a composition of gel/gel type and the use of pigments coated with a hydrophobic compound ensure uniform and stabilized distribution of the pigments. No sedimentation or aggregation of these particles is observed. What is more, a composition according to the invention shows good coverage properties and affords a homogeneous colour effect on application while at the same time giving the user a sensation of freshness and lightness. Finally, the composition proves to be easy to apply to the surface of the targeted keratin material. This performance is especially characterized technically by good play-time. According to another of its aspects, a subject of the invention is also a process for preparing a cosmetic composition for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising at least one step of mixing:

- an aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent, the said aqueous phase being present in an amount of at least 30% by weight and preferably at least 40% by weight, relative to the total weight of the composition; and

- at least one oily phase gelled with at least one lipophilic gelling agent;

under conditions suitable for obtaining a macroscopically homogeneous mixture;

According to one embodiment variant, this process may advantageously comprise a step of mixing at least three or even more gelled phases.

For obvious reasons, the number of gelled aqueous phases and of gelled oily phases to be considered for forming a composition according to the invention may range for each of the two types of phase beyond two.

Advantageously, the mixing of the phases may be performed at room temperature.

However, the process of the invention may comprise, if necessary, a step of heating the mixture.

According to a particular embodiment, the representative gelled phases of the same type of architecture are gelled with a different gelling agent.

Multi-phase formulas may thus be developed.

According to another of its aspects, a subject of the invention is also a process, especially a cosmetic process, for making up and/or caring for a keratin material, in particular the skin and/or the lips, comprising at least one step that consists in applying to the said keratin material a composition in accordance with the invention.

According to yet another of its aspects, the present invention relates to a process, especially a cosmetic process, for caring for and/or making up a keratin material, in particular the skin and/or the lips, comprising at least the application to the said material of a composition, in particular a macroscopically homogeneous composition, obtained by extemporaneous mixing, before application or at the time of application to the said keratin material, of at least one aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent; and of at least one oily phase gelled with at least one lipophilic gelling agent; the said aqueous phase representing at least 30% by weight and preferably at least 40% by weight, relative to the total weight of the composition; and the said composition comprising at least 10% by weight of pigments coated with at least one hydrophobic compound, relative to the total weight of the composition.

COSMETIC COMPOSITION

Firstly, it is important to note that a composition according to the invention is different from an emulsion.

An emulsion generally consists of an oily liquid phase and an aqueous liquid phase. It is a dispersion of droplets of one of the two liquid phases in the other. The size of the droplets forming the dispersed phase of the emulsion is typically about a micrometer (0.1 to 100 μιη). Furthermore, an emulsion requires the presence of a surfactant or of an emulsifier to ensure its stability over time.

In contrast, a composition according to the invention consists of a macroscopically homogeneous mixture of two immiscible gelled phases. These two phases both have a gel-type texture. This texture is especially reflected visually by a consistent and/or creamy appearance.

The terms "macroscopically homogeneous mixture" means a mixture in which each of the gelled phases cannot be individualized with the naked eye.

More precisely, in a composition according to the invention, the gelled aqueous phase and the gelled oily phase interpenetrate and thus form a stable, consistent product. This consistency is achieved by mixing interpenetrated macrodomains. These interpenetrated macrodomains are not measurable objects. Thus, by microscope, the composition according to the invention is very different from an emulsion.

It cannot be characterized either as having a "sense", i.e. an O/W or W/O sense. Thus, a composition according to the invention has a gel-type consistency. Furthermore, the stability of the composition is long-lasting without surfactant. Consequently, a cosmetic composition according to the invention does not require any surfactant or silicone emulsifier to ensure its stability over time. It is known from the state of the art to observe the intimate nature of the mixture of the aqueous and oily gels in a gel-type composition, for example, by introducing a dye substance into either the oily or aqueous gel phases before forming the gel-type composition. On visual inspection, the dye is seen to be uniformly dispersed, even though the dye is present in only one of the oily gel or aqueous gel. Indeed, if two different dyes of different colours are introduced into the oily and aqueous phases, respectively, before forming the gel-type composition, both colours can be observed uniformly dispersed throughout the gel-type composition. This is in contrast to an emulsion wherein if a dye that is either water-soluble or oil-soluble is introduced into the aqueous or oily phases, respectively, before forming an emulsion, only the colour of the dye in the external phase will be observed (Remington: The Science and Practice of Pharmacy, 19th Edition (1995) Chapter 21, page 282).

It is also known to distinguish a gel-type composition from an emulsion by performing a "drop test". This test consists to demonstrate the bi-continous nature of a gel-type composition. Indeed, as mentioned above, the composition's consistency is achieved by interpenetrating oily and aqueous gelled domains. Therefore, the bi-continous nature of a gel-type composition can be highlighted by a simple test with respectively hydrophilic and hydrophobic solvents. This test consists to deposit, on the one hand, a droplet of a hydrophilic solvent on a first sample of the tested composition, and, on the other hand, a droplet of a hydrophobic solvent on a second sample of the same tested composition, and to analyze the behavior of both droplets of solvents. In the case of an O/W emulsion, a droplet of hydrophilic solvent diffuses in the sample and a droplet of hydrophobic solvent remains at the sample surface. In the case of a W/O emulsion, a droplet of hydrophilic solvent remains at the sample surface and a droplet of hydrophobic solvent diffuses throughout sample. Finally, in the case of a gel-type composition (bi- continuous system), the hydrophilic and hydrophobic droplets diffuse in the entire sample.

In particular, in the case of the present invention, the test which will be privileged for distinguishing a gel-type composition from an emulsion consists in a dilution test. Indeed, in a gel-type composition, the gelled aqueous domains and gel oily domains interpenetrate and form a stable and consistent product, whose dilution behavior in water and oil is different of emulsion's behavior. Therefore, the dilution behavior of a gel-type composition (bi-continuous system) can be compared to emulsions. More specifically, the dilution test consists to put 40g of product plus 160g of dilution solvent (water or oil) in a 30 ml plastic beaker. The dilution is performed under controlled agitation to avoid any phenomenon of emulsification. In particular, it is done using a planetary mixer: Speed Mixer TM DAC400FVZ. The Speed Mixer is set to 1500 rpm for 4 minutes. Finally, observation of resulting sample is made with a light microscope at a magnification of x 100 (xlOxlO). It may be noticed that oils like Parleam® and Xiameter PMX-200 Silicone Fluid 5CS® from Dow Corning are convenient as dilution solvents.

In the case of a gel-type composition (bi-continuous system), when diluted either in oil or water, a heterogeneous aspect is always observed. When a gel-type composition (bi-continuous system) is diluted with water, one will observe lumps of oily gel in suspension and when a gel-type composition (bi-continuous system) is diluted with oil, one will observe lumps of aqueous gel in suspension.

On the contrary, upon dilution, emulsions display a different behavior. An O/W emulsion when it is diluted with an aqueous solvent will gradually thin up without presenting a heterogeneous and lumpy aspect. This same O/W emulsion when diluted with oil will present a heterogeneous appearance (lumps of O/W emulsion suspended in oil). A W/O emulsion when diluted with an aqueous solvent will present a heterogeneous appearance (lumps of W/O emulsion is suspended in the water). This same W/O emulsion when diluted with oil will gradually thin up without presenting a heterogeneous and lumpy aspect.

According to the present invention, the gelled aqueous phase and the gelled oily phase forming a composition according to the invention are present therein in a weight ratio ranging from 30/70 to 70/30 and preferably in a weight ratio ranging from 40/60 to 60/40. More preferentially, the aqueous phase and the oily phase are present in a weight ratio ranging from 50/50 to 60/40.

The ratio between the two gelled phases is adjusted according to the desired cosmetic properties.

Advantageously, a composition according to the invention is in the form of a creamy gel with a minimum stress below which it does not flow unless it has been subjected to an external mechanical stress. As emerges from the text hereinbelow, a composition according to the invention may have a minimum threshold stress of 1.5 Pa and in particular greater than 10 Pa.

It may also advantageously have a stiffness modulus G* at least equal to 400 Pa and preferably greater than 1000 Pa.

According to an advantageous embodiment variant, the gelled phases under consideration to form a composition according to the invention may have, respectively, a threshold stress of greater than 1.5 Pa and preferably greater than 10 Pa.

Characterization of the threshold stresses is performed by oscillating rheology measurements. A method is proposed in the examples section of the present text.

In general, the corresponding measurements are taken at 25°C using a Haake RS600 imposed-stress rheometer equipped with a plate-plate measuring body (60 mm diameter) fitted with an anti-evaporation device (bell jar). For each measurement, the sample is placed delicately in position and the measurements start 5 minutes after placing the sample in the air gap (2 mm). The tested composition is then subjected to a stress ramp from 10^"2 to 10³ Pa at a set frequency of 1 Hz.

A composition according to the invention may also have a certain elasticity. This elasticity may be characterized by a stiffness modulus G* which, under this minimum stress threshold, may be at least equal to 400 Pa and preferably greater than 1000 Pa. The value G* of a composition may be obtained by subjecting the composition under consideration to a stress ramp from 10^"2 to 10³ Pa at a set frequency of 1 Hz.

HYDROPHILIC GELLING AGENT

For the purposes of the present invention, the term "hydrophilic gelling agent" means a compound that is capable of gelling the aqueous phase of the compositions according to the invention.

The gelling agent is hydrophilic and is thus present in the aqueous phase of the composition.

The gelling agent may be water-soluble or water-dispersible.

As stated above, the aqueous phase of a composition according to the invention is gelled with at least one hydrophilic gelling agent chosen from synthetic polymeric gelling agents. For the purposes of the invention, the term "synthetic" means that the polymer is neither naturally existing nor a derivative of a polymer of natural origin.

The synthetic polymeric hydrophilic gelling agent under consideration according to the invention may or may not be particulate.

For the purposes of the invention, the term "particulate" means that the polymer is in the form of particles, preferably spherical particles.

As emerges from the text hereinbelow, the polymeric hydrophilic gelling agent is advantageously chosen from crosslinked acrylic homopolymers or copolymers; associative polymers, in particular associative polymers of polyurethane type; polyacrylamides and crosslinked and/or neutralized 2-acrylamido-2-methylpropanesulfonic acid polymers and copolymers; modified or unmodified carboxyvinyl polymers, and mixtures thereof, especially as defined below.

Proportions of such gelling agents will notably vary according to the considered hydrophilic gelling agent and/or according to the nature of the coated pigments considered in the composition according to the invention.

A. Particulate synthetic polymeric gelling agents

They are preferably chosen from crosslinked polymers.

They may especially be crosslinked acrylic homopolymers or copolymers, which are preferably partially neutralized or neutralized, and which are in particulate form.

According to one embodiment, the particulate gelling agent according to the present invention is chosen from crosslinked sodium polyacrylates. Preferably, it has in the dry or non-hydrated state a mean size of less than or equal to 100 μπι and preferably less than or equal to 50 μπι. The mean size of the particles corresponds to the mass-average diameter (D50) measured by laser particle size analysis or another equivalent method known to those skilled in the art.

Thus, preferably, the particulate gelling agent according to the present invention is chosen from crosslinked sodium polyacrylates, preferably in the form of particles with a mean size (or mean diameter) of less than or equal to 100 microns, more preferably in the form of spherical particles.

As examples of crosslinked sodium polyacrylates, mention may be made of those sold under the brand names Octacare XI 00, XI 10 and RM100 by the company Avecia, those sold under the names Flocare GB300 and Flosorb 500 by the company SNF, those sold under the names Luquasorb 1003, Luquasorb 1010, Luquasorb 1280 and Luquasorb 1110 by the company BASF, those sold under the names Water Lock G400 and G430 (INCI name: Acrylamide/Sodium acrylate copolymer) by the company Grain Processing.

Mention may also be made of crosslinked polyacrylate microspheres, for instance those sold under the name Aquakeep^® 10 SH NF by the company Sumitomo Seika.

Such gelling agents may be used in a proportion of from 0.1% to 5% by weight of solids relative to the total weight of the aqueous phase, especially from 0.3% to 2% by weight and in particular in a proportion of about from 0.5% to 1.7% by weight, relative to the total weight of the aqueous phase.

B. Non-particulate synthetic polymeric gelling agents

This family of gelling agents may be detailed under the following subfamilies:

1. Associative polymers,

2. Polyacrylamides and crosslinked and/or neutralized 2-acrylamido-2- methylpropanesulfonic acid polymers and copolymers, and

3. Modified or unmodified carboxyvinyl polymers.

B.l Associative polymers

For the purposes of the present invention, the term "associative polymer" means any amphiphilic polymer comprising in its structure at least one fatty chain and at least one hydrophilic portion. The associative polymers in accordance with the present invention may be anionic, cationic, nonionic or amphoteric.

Associative anionic polymers

Among the associative anionic polymers that may be mentioned are those comprising at least one hydrophilic unit, and at least one fatty-chain allyl ether unit, more particularly those of which the hydrophilic unit is formed by an unsaturated ethylenic anionic monomer, more particularly by a vinylcarboxylic acid and most particularly by an acrylic acid or a methacrylic acid or mixtures thereof, and of which the fatty-chain allyl ether unit corresponds to the monomer of formula (I) below:

CH₂ = C(R')CH₂ O B_n R (I)

in which R' denotes H or CH₃, B denotes the ethylenoxy radical, n is zero or denotes an integer ranging from 1 to 100, R denotes a hydrocarbon-based radical chosen from alkyl, arylalkyl, aryl, alkylaryl and cycloalkyl radicals, comprising from 8 to 30 carbon atoms, preferably 10 to 24 and even more particularly from 12 to 18 carbon atoms.

Anionic amphiphilic polymers of this type are described and prepared, according to an emulsion polymerization process, in patent EP 0 216 479.

Among the associative anionic polymers that may also be mentioned are maleic anhydride/C₃o-C₃s a-olefin/alkyl maleate terpolymers, such as the product maleic anhydride/C₃o-C₃8 a-olefin/isopropyl maleate copolymer sold under the name Performa V 1608 by the company Newphase Technologies.

Among the associative anionic polymers, mention may be made, according to a preferred embodiment, of copolymers comprising among their monomers an α,β- monoethylenically unsaturated carboxylic acid and an ester of an α,β-monoethylenically unsaturated carboxylic acid and of an oxyalkylenated fatty alcohol.

Preferentially, these compounds also comprise as monomer an ester of an α,β- monoethylenically unsaturated carboxylic acid and of a C1-C4 alcohol.

Examples of compounds of this type that may be mentioned include Aculyn

22^® sold by the company Rohm & Haas, which is a methacrylic acid/ethyl acrylate/oxyalkylenated stearyl methacrylate (comprising 20 OE units) terpolymer or Aculyn 28 (methacrylic acid/ethyl acrylate/oxyethylenated behenyl methacrylate (25 OE) terpolymer).

Examples of associative anionic polymers that may also be mentioned include anionic polymers comprising at least one hydrophilic unit of unsaturated olefinic carboxylic acid type, and at least one hydrophobic unit exclusively of the type such as a (Cio-C₃o) alkyl ester of an unsaturated carboxylic acid. Examples that may be mentioned include the anionic polymers described and prepared according to patents US 3 915 921 and 4 509 949. Associative anionic polymers that may also be mentioned include anionic terpolymers.

The anionic terpolymer used according to the invention is a linear or branched and/or crosslinked terpolymer, of at least one monomer (1) bearing an acid function in free form, which is partially or totally salified with a nonionic monomer (2) chosen from N,N- dimethylacrylamide and 2-hydroxyethyl acrylate and at least one polyoxyethylenated alkyl acrylate monomer (3) of formula (I) below:

(I)

in which Rl represents a hydrogen atom, R represents a linear or branched C₂-C₈ alkyl radical and n represents a number ranging from 1 to 10.

The term "branched polymer" denotes a non-linear polymer which bears side chains so as to obtain, when this polymer is dissolved in water, a high degree of entanglement leading to very high viscosities, at a low speed gradient.

The term "crosslinked polymer" denotes a non-linear polymer which is in the form of a three-dimensional network that is insoluble in water but swellable in water, leading to the production of a chemical gel.

The acid function of the monomer (1) is especially a sulfonic acid or phosphonic acid function, the said functions being in free or partially or totally salified form.

The monomer (1) may be chosen from styrenesulfonic acid, ethylsulfonic acid and 2-methyl-2-[(l-oxo-2-propenyl)amino]-l-propanesulfonic acid (also known as acryloyldimethyl taurate), in free or partially or totally salified form. It is present in the anionic terpolymer preferably in molar proportions of between 5 mol% and 95 mol% and more particularly between 10 mol% and 90 mol%. The monomer (1) will more particularly be 2-methyl-2-[(l-oxo-2-propenyl)amino]-l-propanesulfonic acid in free or partially or totally salified form. The acid function in partially or totally salified form will preferably be an alkali metal salt such as a sodium or potassium salt, an ammonium salt, an amino alcohol salt such as a monoethanolamine salt, or an amino acid salt such as a lysine salt.

The monomer (2) is preferably present in the anionic terpolymer in molar proportions of between 4.9 mol% and 90 mol%, more particularly between 9.5 mol% and 85 mol% and even more particularly between 19.5 mol% and 75 mol%.

In formula (I), examples of linear C₈-Ci₆ alkyl radicals that may be mentioned include octyl, decyl, undecyl, tridecyl, tetradecyl, pentadecyl and hexadecyl.

In formula (I), examples of branched C₈-Ci₆ alkyl radicals that may be mentioned include 2-ethylhexyl, 2-propylheptyl, 2-butyloctyl, 2-pentylnonyl, 2- hexyldecyl, 4-methylpentyl, 5-methylhexyl, 6-methylheptyl, 15-methylpentadecyl, 16- methylheptadecyl and 2-hexyloctyl.

According to a particular form of the invention, in formula (I), R denotes a C₁₂- C i6 alkyl radical.

According to a particular form of the invention, in formula (I), n ranges from 3 to 5.

Tetraethoxylated lauryl acrylate will more particularly be used as monomer of formula (I).

The monomer (3) of formula (I) is preferably present in the anionic terpolymer in molar proportions of between 0.1 mol% and 10 mol% and more particularly between 0.5 mol% and 5 mol%.

According to a particular mode of the invention, the anionic terpolymer is crosslinked and/or branched with a diethylenic or polyethylenic compound in the proportion expressed relative to the total amount of monomers used, from 0.005 mol% to 1 mol%, preferably from 0.01 mol% to 0.5 mol% and more particularly from 0.01 mol% to 0.25 mol%.

The crosslinking agent and/or branching agent is preferably chosen from ethylene glycol dimethacrylate, diallyloxyacetic acid or a salt thereof, such as sodium diallyloxyacetate, tetraallyloxy ethane, ethylene glycol diacrylate, diallylurea, triallylamine, trimethylolpropane triacrylate and methylenebis(acrylamide), or mixtures thereof. The anionic terpolymer may contain additives such as complexing agents, transfer agents or chain-limiting agents.

Use will be made more particularly of an anionic terpolymer of 2-methyl-2-[(l- oxo-2-propenyl)amino]-l-propanesulfonic acid partially or totally salified in the form of the ammonium salt, N,N-dimethylacrylamide and tetraethoxylated lauryl acrylate crosslinked with trimethylolpropane triacrylate, of INCI name Polyacrylate Crosspolymer- 6, such as the product sold under the trade name Sepimax Zen® by the company SEPPIC.

Cationic associative polymers

Cationic associative polymers that may be mentioned include polyacrylates bearing amine side groups.

The polyacrylates bearing quaternized or non-quaternized amine side groups contain, for example, hydrophobic groups of the type such as steareth-20 (polyoxyethylenated (20) stearyl alcohol).

Examples of polyacrylates bearing amino side chains that may be mentioned are the polymers 8781-121B or 9492-103 from the company National Starch.

Nonionic associative polymers

The nonionic associative polymers may be chosen from:

- copolymers of vinylpyrrolidone and of fatty-chain hydrophobic monomers;

- copolymers of Ci-C₆ alkyl methacrylates or acrylates and of amphiphilic monomers comprising at least one fatty chain;

- copolymers of hydrophilic methacrylates or acrylates and of hydrophobic monomers comprising at least one fatty chain, for instance the polyethylene glycol methaciylate/lauryl methacrylate copolymer;

- associative polyurethanes.

Associative polyurethanes are nonionic block copolymers comprising in the chain both hydrophilic blocks usually of polyoxyethylene nature (polyurethanes may then be referred to as polyurethane polyethers), and hydrophobic blocks that may be aliphatic sequences alone and/or cycloaliphatic and/or aromatic sequences.

In particular, these polymers comprise at least two hydrocarbon-based lipophilic chains containing from 6 to 30 carbon atoms, separated by a hydrophilic block, the hydrocarbon-based chains possibly being pendent chains or chains at the end of the hydrophilic block. In particular, it is possible for one or more pendent chains to be envisioned. In addition, the polymer may comprise a hydrocarbon-based chain at one end or at both ends of a hydrophilic block.

Associative polyurethanes may be block polymers, in triblock or multiblock form. The hydrophobic blocks may thus be at each end of the chain (for example: triblock copolymer containing a hydrophilic central block) or distributed both at the ends and in the chain (for example: multiblock copolymer). These polymers may also be graft polymers or star polymers. Preferably, the associative polyurethanes are triblock copolymers in which the hydrophilic block is a polyoxy ethylene chain comprising from 50 to 1000 oxyethylene groups. In general, associative polyurethanes comprise a urethane bond between the hydrophilic blocks, whence arises the name.

According to a preferred embodiment, a nonionic associative polymer of polyurethane type is used as gelling agent.

As examples of nonionic fatty-chain polyurethane poly ethers that may be used in the invention, it is also possible to use Rheolate^® FX 1 100 (Steareth-100/PEG 136/HDI (hexamethyl diisocyanate) copolymer), Rheolate^® 205 containing a urea function, sold by the company Elementis, or Rheolate^® 208, 204 or 212, and also Aery sol^® RM 184 or Acrysol^® RM 2020.

Mention may also be made of the product Elfacos^® T210 containing a C₁₂-C₁₄ alkyl chain, and the product Elfacos^® T212 containing a Ci₆-i8 alkyl chain (PPG-14 Palmeth-60 Hexyl Dicarbamate), from Akzo.

The product DW 1206B^® from Rohm & Haas containing a C₂o alkyl chain and a urethane bond, sold at a solids content of 20% in water, may also be used.

It is also possible to use solutions or dispersions of these polymers, in particular in water or in aqueous-alcoholic medium. Examples of such polymers that may be mentioned are Rheolate 255, Rheolate 278 and Rheolate 244 sold by the company Elementis. Use may also be made of the products DW 1206F and DW 1206J sold by the company Rohm & Haas.

The associative polyurethanes that may be used according to the invention are in particular those described in the article by G. Fonnum, J. Bakke and Fk. Hansen - Colloid Polym. Sci., 271, 380-389 (1993). Even more particularly, according to the invention, use may also be made of an associative polyurethane that may be obtained by polycondensation of at least three compounds comprising (i) at least one polyethylene glycol comprising from 150 to 180 mol of ethylene oxide, (ii) steaiyl alcohol or decyl alcohol, and (iii) at least one diisocyanate.

Such polyurethane polyethers are sold in particular by the company Rohm &

® ® ®

Haas under the names Aculyn 46 and Aculyn 44 . Aculyn 46 is a polycondensate of polyethylene glycol containing 150 or 180 mol of ethylene oxide, of steaiyl alcohol and of methylenebis(4-cyclohexyl isocyanate) (SMDI), at 15% by weight in a matrix of maltodextrin (4%) and water (81%), and Aculyn^® 44 is a polycondensate of polyethylene glycol containing 150 or 180 mol of ethylene oxide, of decyl alcohol and of methylenebis(4-cyclohexyl isocyanate) (SMDI), at 35% by weight in a mixture of propylene glycol (39%) and water (26%).

It is also possible to use solutions or dispersions of these polymers, in particular in water or in aqueous-alcoholic medium. Examples of such polymers that may be mentioned include SER AD FXlOlO, SER AD FX1035 and SER AD 1070 from the

® ® ®

company Elementis, and Rheolate 255, Rheolate 278 and Rheolate 244 sold by the company Elementis. Use may also be made of the products Aculyn^® 44, Aculyn^® 46, DW 1206F and DW 1206J, and also Acrysol^® RM 184 from the company Rohm & Haas, or alternatively Borchi Gel LW 44 from the company Borchers, and mixtures thereof.

Amphoteric associative polymers

Among the associative amphoteric polymers of the invention, mention may be made of crosslinked or non-crosslinked, branched or unbranched amphoteric polymers, which may be obtained by copolymerization:

1) of at least one monomer of formula (IVa) or (IVb):

¾ ^A"

I ⁸

^R4- ¾ =j- C - Z- (C_nH_2n) ^ R₇ (IVa)

R₅ ^{0 R}s

in which R4 and R₅, which may be identical or different, represent a hydrogen atom or a methyl radical;

R6, R₇ and R₈, which may be identical or different, represent a linear or branched alkyl radical containing from 1 to 30 carbon atoms;

Z represents an H group or an oxygen atom;

n is an integer from 2 to 5;

A^" is an anion derived from an organic or mineral acid, such as a methosulfate anion or a halide such as chloride or bromide;

2) of at least one monomer of formula (V):

R - C = CR_{i n}-CO-Z₁ (V)

9 H

in which R₉ and Rio, which may be identical or different, represent a hydrogen atom or a methyl radical;

Zi represents a group OH or a group HC(CH₃)₂CH₂S0₃H;

3) of at least one monomer of formula (VI):

F^- C ^ CF COXR^ (VI) in which R₉ and Rio, which may be identical or different, represent a hydrogen atom or a methyl radical, X denotes an oxygen or nitrogen atom and Rn denotes a linear or branched alkyl radical containing from 1 to 30 carbon atoms;

4) optionally at least one crosslinking or branching agent; at least one of the monomers of formula (IVa), (IVb) or (VI) comprising at least one fatty chain containing from 8 to 30 carbon atoms and said compounds of the monomers of formulae (IVa), (IVb), (V) and (VI) possibly being quaternized, for example with a C₁-C₄ alkyl halide or a C₁-C₄ dialkyl sulfate.

The monomers of formulae (IVa) and (IVb) of the present invention are preferably chosen from the group formed by:

- dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate,

- diethylaminoethyl methacrylate, diethylaminoethyl acrylate,

- dimethylaminopropyl methacrylate, dimethylaminopropyl acrylate, - dimethylaminopropylmethacrylamide, dimethylaminopropylacrylamide, which are optionally quatemized, for example with a C1-C4 alkyl halide or a C1-C4 dialkyl sulfate.

More particularly, the monomer of formula (IVa) is chosen from acrylamidopropyltrimethylammonium chloride and methacrylamidopropyl- trimethylammonium chloride.

The compounds of formula (V) of the present invention are preferably chosen from the group formed by acrylic acid, methacrylic acid, crotonic acid, 2-methylcrotonic acid, 2-acrylamido-2-methylpropanesulfonic acid and 2-methacrylamido-2- methylpropanesulfonic acid. More particularly, the monomer of formula (V) is acrylic acid.

The monomers of formula (VI) of the present invention are preferably chosen from the group formed by C12-C22 and more particularly C16-C18 alkyl acrylates or methacrylates.

The crosslinking or branching agent is preferably chosen from Ν,Ν'- methylenebisacrylamide, triallylmethylammonium chloride, allyl methacrylate, n- methylolacrylamide, polyethylene glycol dimethacrylates, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate and allyl sucrose.

The polymers according to the invention may also contain other monomers such as nonionic monomers and in particular C1-C4 alkyl acrylates or methacrylates.

The ratio of the number of cationic charges/anionic charges in these amphoteric polymers is preferably equal to about 1.

The weight-average molecular weights of the associative amphoteric polymers have a weight-average molecular mass of greater than 500, preferably between 10 000 and 10 000 000 and even more preferentially between 100 000 and 8 000 000.

Preferably, the associative amphoteric polymers of the invention contain from 1 mol% to 99 mol%, more preferentially from 20 mol% to 95 mol% and even more preferentially from 25 mol% to 75 mol% of compound(s) of formula (IVa) or (IVb). They also preferably contain from 1 mol% to 80 mol%, more preferentially from 5 mol% to 80 mol% and even more preferentially from 25 mol% to 75 mol% of compound(s) of formula (V). The content of compound(s) of formula (VI) is preferably between 0.1 mol% and 70 mol%, more preferentially between 1 mol% and 50 mol% and even more preferentially between 1 mol% and 10 mol%. The crosslinking or branching agent, when it is present, is preferably between 0.0001 mol% and 1 mol% and even more preferentially between 0.0001 mol% and 0.1 mol%.

Preferably, the mole ratio between the compound(s) of formula (IVa) or (IVb) and the compound(s) of formula (V) ranges from 20/80 to 95/5 and more preferentially from 25/75 to 75/25.

The associative amphoteric polymers according to the invention are described, for example, in patent application WO 98/44012.

The amphoteric polymers that are particularly preferred according to the invention are chosen from acrylic acid/acrylamidopropyltrimethylammonium chloride/stearyl methacrylate copolymers.

According to a preferred embodiment, the associative polymer is chosen from nonionic associative polymers and more particularly from associative polyurethanes, such as Steareth-100/PEG-136/HDI Copolymer sold under the name Rheolate FX 1100 by Elementis.

Such an associative polymer is advantageously used in a proportion of from 0.1% to 8% by weight of solids and preferably between 0.5% and 4% by weight, relative to the total weight of the aqueous phase. B.2 Polyacrylamides and crosslinked and/or neutralized 2-acrylamido-2- methylpropanesulfonic acid polymers and copolymers

The polymers used that are suitable as aqueous gelling agent for the invention may be crosslinked or non-crosslinked homopolymers or copolymers comprising at least the 2-acrylamidomethylpropanesulfonic acid (AMPS^®) monomer, in a form partially or totally neutralized with a mineral base other than aqueous ammonia, such as sodium hydroxide or potassium hydroxide.

They are preferably totally or almost totally neutralized, i.e. at least 90% neutralized.

These AMPS^® polymers according to the invention may be crosslinked or non- crosslinked. When the polymers are crosslinked, the crosslinking agents may be chosen from the polyolefinically unsaturated compounds commonly used for crosslinking polymers obtained by free-radical polymerization.

Examples of crosslinking agents that may be mentioned include divinylbenzene, diallyl ether, dipropylene glycol diallyl ether, polyglycol diallyl ethers, triethylene glycol divinyl ether, hydroquinone diallyl ether, ethylene glycol or tetraethylene glycol di(meth)acrylate, trimethylolpropane triacrylate, methylenebisacrylamide, methylenebismethacrylamide, triallylamine, triallyl cyanurate, diallyl maleate, tetraallylethylenediamine, tetraallyloxyethane, trimethylolpropane diallyl ether, allyl (meth)acrylate, allylic ethers of alcohols of the sugar series, or other allyl or vinyl ethers of polyfunctional alcohols, and also the allylic esters of phosphoric and/or vinylphosphonic acid derivatives, or mixtures of these compounds.

According to one preferred embodiment of the invention, the crosslinking agent is chosen from methylenebisacrylamide, allyl methacrylate and trimethylolpropane triacrylate (TMPTA). The degree of crosslinking generally ranges from 0.01 mol% to 10 mol% and more particularly from 0.2 mol% to 2 mol% relative to the polymer.

The AMPS^® polymers that are suitable for use in the invention are water- soluble or water-dispersible. They are in this case:

-either "homopolymers" comprising only AMPS monomers and, if they are crosslinked, one or more crosslinking agents such as those defined above;

- or copolymers obtained from AMPS^® and from one or more hydrophilic or hydrophobic ethylenically unsaturated monomers and, if they are crosslinked, one or more crosslinking agents such as those defined above. When said copolymers comprise hydrophobic ethylenically unsaturated monomers, the latter do not comprise a fatty chain and are preferably present in small amounts.

For the purpose of the present invention, the term "fatty chain" is intended to mean any hydrocarbon-based chain containing at least 7 carbon atoms.

The term "water-soluble or water-dispersible" means polymers which, when introduced into an aqueous phase at 25°C, at a mass concentration equal to 1%, make it possible to obtain a macroscopically homogeneous and transparent solution, i.e. a solution with a maximum light transmittance value, at a wavelength equal to 500 nm, through a sample 1 cm thick, of at least 60% and preferably of at least 70%. The "homopolymers" according to the invention are preferably crosslinked and neutralized, and they may be obtained according to the preparation process comprising the following steps:

(a) the monomer such as AMPS in free form is dispersed or dissolved in a solution of tert-butanol or of water and tert-butanol;

(b) the monomer solution or dispersion obtained in (a) is neutralized with one or more mineral or organic bases, preferably aqueous ammonia ¾, in an amount making it possible to obtain a degree of neutralization of the sulfonic acid functions of the polymer ranging from 90% to 100%;

(c) the crosslinking monomer(s) are added to the solution or dispersion obtained in (b);

(d) a standard free-radical polymerization is performed in the presence of free- radical initiators at a temperature ranging from 10 to 150°C; the polymer precipitates in the tert-butanol-based solution or dispersion.

The water-soluble or water-dispersible AMPS^® copolymers according to the invention contain water-soluble ethylenically unsaturated monomers, hydrophobic monomers, or mixtures thereof.

The water-soluble co-monomers may be ionic or nonionic.

Among the ionic water-soluble co-monomers, mention may be made, for example, of the following compounds and salts thereof:

- (meth)acrylic acid,

- styrenesulfonic acid,

- vinylsulfonic acid and (meth)allylsulfonic acid,

- vinylphosphonic acid,

- maleic acid,

- itaconic acid,

- crotonic acid,

- water-soluble vinyl monomers of formula (A) below:

HLC— CR,

^* CO W

X, in which: - Ri is chosen from H, -CH₃, -C₂H₅ and -C₃H₇,

- Xi is chosen from:

- alkyl oxides of type -OR₂ where R₂ is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbon atoms, substituted with at least one sulfonic (-S0₃-) and/or sulfate (-SO₄-) and/or phosphate (-PO₄H₂-) group.

Among the nonionic water-soluble co-monomers, mention may be made, for example, of:

- (meth)acryl amide,

- N-vinylacetamide and N-methyl-N-vinylacetamide,

- N-vinylformamide and N-methyl-N-vinylformamide,

- maleic anhydride,

- vinylamine,

- N-vinyllactams comprising a cyclic alkyl group containing from 4 to 9 carbon atoms, such as N-vinylpyrrolidone, N-butyrolactam and N-vinylcaprolactam,

- vinyl alcohol of formula CH₂=CHOH,

- water-soluble vinyl monomers of formula (B) below:

H_?C— OR

CO ^(a)

I

^X2 in which:

- R₃ is chosen from H, -CH₃, -C₂H₅ and -C₃H₇,

- X₂ is chosen from:

- alkyl oxides of the type -OR₄ where R₄ is a linear or branched, saturated or unsaturated hydrocarbon-based radical having from 1 to 6 carbon atoms, optionally substituted with a halogen (iodine, bromine, chlorine or fluorine) atom; a hydroxyl (-OH) group; ether.

Mention may be made, for example, of glycidyl (meth)acrylate, hydroxyethyl methacrylate, and (meth)acrylates of ethylene glycol, of diethylene glycol or of polyalkylene glycol.

Among the hydrophobic co-monomers without a fatty chain, mention may be made, for example, of: - styrene and derivatives thereof, such as 4-butylstyrene, a-methylstyrene and vinyltoluene;

- vinyl acetate of formula CH₂=CH-OCOCH₃;

- vinyl ethers of formula CH₂=CHOR in which R is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbons;

- acrylonitrile;

- caprolactone;

- vinyl chloride and vinylidene chloride;

- silicone derivatives, which, after polymerization, result in silicone polymers such as methacryloxypropyltris(trimethylsiloxy)silane and silicone methacrylamides;

- hydrophobic vinyl monomers of formula (C) below:

K C=CR

I ⁴ (C)

CO '

I

x„ j

in which:

- R4 is chosen from H, -CH₃, -C₂H₅ and -C₃H₇;

- X₃ is chosen from:

- alkyl oxides of the type -OR₅ where R₅ is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbon atoms.

Mention is made, for example, of methyl methacrylate, ethyl methacrylate, n- butyl (meth)acrylate, tert-butyl (meth)acrylate, cyclohexyl acrylate, isobornyl acrylate and 2-ethylhexyl acrylate.

The water-soluble or water-dispersible AMPS^® polymers of the invention preferably have a molar mass ranging from 50 000 g/mol to 10 000 000 g/mol, preferably from 80 000 g/mol to 8 000 000 g/mol, and even more preferably from 100 000 g/mol to 7 000 000 g/mol.

As water-soluble or water-dispersible AMPS homopolymers in accordance with the invention, mention may be made, for example, of crosslinked or non-crosslinked polymers of sodium acrylamido-2-methylpropanesulfonate, such as that used in the commercial product Simulgel 800 (CTFA name: Sodium Polyacryloyldimethyl Taurate), crosslinked ammonium acrylamido-2-methylpropanesulfonate polymers (INCI name: Ammonium polydimethyltauramide) such as those described in patent EP 0 815 928 Bl and such as the product sold under the trade name Hostacerin AMPS^® by the company Clariant.

As water-soluble or water-dispersible AMPS copolymers in accordance with the invention, examples that may be mentioned include:

- crosslinked acrylamide/sodium acrylamido-2-methylpropanesulfonate copolymers, such as that used in the commercial product Sepigel 305 (CTFA name: Polyacrylamide/Ci3-Ci4 Isoparaffin/ Laureth-7) or that used in the commercial product sold under the name Simulgel 600 (CTFA name: Acrylamide/Sodium Acryloyldimethyltaurate/Isohexadecane/Polysorbate-80) by the company SEPPIC;

- copolymers of AMPS^® and of vinylpyrrolidone or vinylformamide, such as that used in the commercial product sold under the name Aristoflex AVC^® by the company Clariant (CTFA name: Ammonium acryloyldimethyltaurate/VP copolymer) but neutralized with sodium hydroxide or potassium hydroxide;

- copolymers of AMPS^® and of sodium acrylate, for instance the AMPS/sodium acrylate copolymer, such as that used in the commercial product sold under the name Simulgel EG^® by the company SEPPIC or under the trade name Sepinov EM (CTFA name: Hydroxy ethyl acrylate/sodium acryloyldimethyltaurate copolymer);

- copolymers of AMPS^® and of hydroxyethyl acrylate, for instance the AMPS^®/hydroxyethyl acrylate copolymer, such as that used in the commercial product sold under the name Simulgel NS^® by the company SEPPIC (CTFA name: Hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer (and) squalane (and) polysorbate 60), or such as the product sold under the name Sodium acrylamido-2- methylpropanesulfonate/hydroxyethyl acrylate copolymer, such as the commercial product Sepinov EMT 10 (INCI name: Hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer).

As preferred water-soluble or water-dispersible AMPS copolymers in accordance with the invention, mention may be made of copolymers of AMPS^® and of hydroxyethyl acrylate.

Preferably, the product sold under the name Sodium acrylamido-2- methylpropanesulfonate/hydroxy ethyl acrylate copolymer, such as the commercial product Sepinov EMT 10 (INCI name: Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer) is used as water-soluble or water-dispersible AMPS copolymers in accordance with the invention.

In general, an aqueous phase according to the invention may comprise from 0.1% to 10%) by weight of solids, preferably 0.2% to 8%> by weight, and more preferentially from 0.5% to 6%> by weight of polyacrylamide(s) and/or of crosslinked and/or neutralized 2-acrylamido-2-methylpropanesulfonic acid polymer(s) and copolymer(s) relative to its total weight.

B.3 Modified or unmodified carboxyvinyl polymers

The modified or unmodified carboxyvinyl polymers may be copolymers derived from the polymerization of at least one monomer (a) chosen from α,β-ethylenically unsaturated carboxylic acids or esters thereof, with at least one ethylenically unsaturated monomer (b) comprising a hydrophobic group.

The term "copolymers" means both copolymers obtained from two types of monomer and those obtained from more than two types of monomer, such as terpolymers obtained from three types of monomer.

Their chemical structure more particularly comprises at least one hydrophilic unit and at least one hydrophobic unit. The term "hydrophobic group or unit" means a radical with a saturated or unsaturated, linear or branched hydrocarbon-based chain, comprising at least 8 carbon atoms, preferably from 10 to 30 carbon atoms, in particular from 12 to 30 carbon atoms and more preferentially from 18 to 30 carbon atoms.

Preferably, these copolymers are chosen from copolymers derived from the polymerization:

- of at least one monomer of formula (1) below:

CH, = C— C— OH

I I I

R^{l 0} (1)

in which Ri denotes H or CH₃ or C2H5, i.e. acrylic acid, methacrylic acid or ethacrylic acid monomers, and

- of at least one monomer of unsaturated carboxylic acid (Cio-C₃o)alkyl ester type corresponding to the monomer of formula (2) below: R O

² (2)

in which R₂ denotes H or CH₃ or C₂H₅ (i.e. acrylate, methacrylate or ethacrylate units) and preferably H (acrylate units) or CH₃ (methacrylate units), R₃ denoting a Cio-C₃₀ and preferably Ci₂-C₂₂ alkyl radical.

The unsaturated carboxylic acid (Cio-C₃o)alkyl esters are preferably chosen from lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate and dodecyl acrylate, and the corresponding methacrylates, such as lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate and dodecyl methacrylate, and mixtures thereof.

According to a preferred embodiment, these polymers are crosslinked.

Among the copolymers of this type, use will more particularly be made of polymers derived from the polymerization of a monomer mixture comprising:

- essentially acrylic acid,

- an ester of formula (2) described above in which R₂ denotes H or CH₃, R₃ denoting an alkyl radical containing from 12 to 22 carbon atoms,

- (iii) and a crosslinking agent, which is a well-known copolymerizable polyethylenic unsaturated monomer, such as diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate or methylenebisacrylamide.

Among the copolymers of this type, use will more particularly be made of those consisting of from 95% to 60% by weight of acrylic acid (hydrophilic unit), 4% to 40% by weight of Cio-C₃₀ alkyl acrylate (hydrophobic unit) and 0% to 6%> by weight of crosslinking polymerizable monomer, or alternatively those consisting of from 98% to 96%) by weight of acrylic acid (hydrophilic unit), 1%> to 4% by weight of Cio-C₃₀ alkyl acrylate (hydrophobic unit) and 0.1%> to 0.6%> by weight of crosslinking polymerizable monomer such as those described previously.

Among the abovementioned polymers, the ones that are most particularly preferred according to the present invention are acrylate/Cio-C₃o-alkyl acrylate copolymers (INCI name: Acrylates/Cio-₃o Alkyl acrylate Crosspolymer) such as the products sold by the company Lubrizol under the trade names Pemulen TR-1 , Pemulen TR-2, Carbopol 1382, Carbopol EDT 2020 and Carbopol Ultrez 20 Polymer, and even more preferentially Pemulen TR-2. Among the modified or unmodified carboxyvinyl polymers, mention may also be made of sodium polyacrylates such as those sold under the name Cosmedia SP^® containing 90% solids and 10% water, or Cosmedia SPL^® as an inverse emulsion containing about 60% solids, an oil (hydrogenated polydecene) and a surfactant (PPG-5 Laureth-5), both sold by the company Cognis.

Mention may also be made of partially neutralized sodium polyacrylates that are in the form of an inverse emulsion comprising at least one polar oil, for example the product sold under the name Luvigel^® EM by the company BASF.

The modified or unmodified carboxyvinyl polymers may also be chosen from crosslinked (meth)acrylic acid homopolymers.

For the purposes of the present patent application, the term " (meth) acrylic" means "acrylic or methacrylic" .

Examples that may be mentioned include the products sold by Lubrizol under the names Carbopol 910, 934, 940, 941, 934 P, 980, 981, 2984, 5984 and Carbopol Ultrez 10 Polymer, or by 3V-Sigma under the name Synthalen K, Synthalen L or Synthalen M.

Among the modified or unmodified carboxyvinyl polymers, mention may be made in particular of Carbopol (CTFA name: carbomer) and Pemulen (CTFA name: Acrylates/Cio-30 alkyl acrylate crosspolymer) sold by the company Lubrizol.

The modified or unmodified carboxyvinyl polymers may be present in a proportion of from 0.1% to 10% by weight of solids relative to the weight of the aqueous phase, in particular from 0.3% to 8% by weight and preferably between 0.4% and 6% by weight, relative to the weight of the aqueous phase. Advantageously, a composition according to the invention comprises a polymeric hydrophilic gelling agent chosen from crosslinked and/or neutralized 2- acrylamido-2-methylpropanesulfonic acid polymers and copolymers.

According to a preferred variant, the synthetic polymeric hydrophilic gelling agent is a copolymer of 2-acrylamido-2-methylpropanesulfonic acid and of hydroxyethyl acrylate. LIPOPHILIC GELLING AGENT

For the purposes of the present invention, the term "lipophilic gelling agent" means a compound that is capable of gelling the oily phase of the compositions according to the invention.

The gelling agent is lipophilic and is thus present in the oily phase of the composition.

The gelling agent is liposoluble or lipodispersible.

As emerges from the text hereinbelow, the lipophilic gelling agent is advantageously chosen from particulate gelling agents, organopolysiloxane elastomers, semi-crystalline polymers, dextrin esters and hydrogen bonding polymers, and mixtures thereof.

Proportions of such gelling agents will notably vary according to the considered lipophilic gelling agent and/or according to the nature of the coated pigments considered in the composition according to the invention.

I. Particulate gelling agents

The particulate gelling agent used in the composition according to the invention is in the form of particles, preferably spherical particles.

As representative lipophilic particulate gelling agents that are suitable for use in the invention, mention may be made most particularly of polar and apolar waxes, modified clays, and silicas such as fumed silicas and hydrophobic silica aerogels.

Waxes

The term "wax" under consideration in the context of the present invention generally means a lipophilic compound that is solid at room temperature (25°C), with a solid/liquid reversible change of state, having a melting point of greater than or equal to 30°C, which may be up to 200°C and in particular up to 120°C.

For the purposes of the invention, the melting point corresponds to the temperature of the most endothermic peak observed on thermal analysis (DSC) as described in standard ISO 11357-3; 1999. The melting point of the wax can be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name MDSC 2920 by the company TA Instruments. The measuring protocol is as follows:

A 5 mg sample of wax placed in a crucible is subjected to a first temperature increase ranging from -20°C to 100°C, at a heating rate of 10°C/minute, it is then cooled from 100°C to -20°C at a cooling rate of 10°C/minute and is finally subjected to a second temperature increase ranging from -20°C to 100°C at a heating rate of 5°C/minute. During the second temperature increase, the variation in the difference in power absorbed by the empty crucible and by the crucible containing the sample of wax is measured as a function of the temperature. The melting point of the compound is the temperature value corresponding to the top of the peak of the curve representing the variation in the difference in power absorbed as a function of the temperature.

The waxes that may be used in the compositions according to the invention are chosen from waxes that are solid at room temperature of animal, plant, mineral or synthetic origin, and mixtures thereof.

For the purposes of the invention, the waxes may be those generally used in cosmetics or dermatology. They may especially be polar or apolar, and hydrocarbon-based, silicone and/or fluoro waxes, optionally comprising ester or hydroxyl functions. They may also be of natural or synthetic origin. a) Apolar waxes

For the purposes of the present invention, the term "apolar wax" means a wax whose solubility parameter at 25°C as defined below, 6_a, is equal to 0 (J/cm )^½

The definition and calculation of the solubility parameters in the Hansen three- dimensional solubility space are described in the paper by CM. Hansen: "The three- dimensional solubility parameters" , J. Paint Technol., 39, 105 (1967).

According to this Hansen space:

- 6D characterizes the London dispersion forces derived from the formation of dipoles induced during molecular impacts;

- δ_ρ characterizes the Debye interaction forces between permanent dipoles and also the Keesom interaction forces between induced dipoles and permanent dipoles;

- 5_h characterizes the specific interaction forces (such as hydrogen bonding, acid/base, donor/acceptor, etc.); and

- 6_a is determined by the equation: δ₃= (δ_ρ ² + 6_h ²)^½. The parameters δ_ρ, 5_h, 6D and 6_a are expressed in (J/cm )^½

Apolar waxes are in particular hydrocarbon waxes consisting solely of carbon and hydrogen atoms and devoid of heteroatoms, such as N, O, Si and P.

The apolar waxes are chosen from microcrystalline waxes, paraffin waxes, ozokerite and polyethylene waxes, and mixtures thereof.

Mention may be made, as ozokerite, of Ozokerite Wax SP 1020 P.

As microcrystalline waxes that may be used, mention may be made of Multiwax W 445^® sold by the company Sonneborn, and Microwax HW^® and Base Wax 30540^® sold by the company Paramelt, and Cerewax^® No. 3 sold by the company Baerlocher.

As microwaxes that may be used in the compositions according to the invention as apolar wax, mention may be made especially of polyethylene microwaxes such as those sold under the names Micropoly 200^®, 220^®, 220L^® and 250S^® by the company Micro Powders.

Polyethylene waxes that may be mentioned include Performalene 500-L

Polyethylene and Performalene 400 Polyethylene sold by New Phase Technologies, and Asensa^® SC 211 sold by the company Honeywell. b) Polar wax

For the purposes of the present invention, the term "polar wax" means a wax whose solubility parameter at 25°C, 6_a, is other than 0 (J/cm )^½

In particular, the term "polar wax" means a wax whose chemical structure is formed essentially from, or even constituted of, carbon and hydrogen atoms, and comprising at least one highly electronegative heteroatom such as an oxygen, nitrogen, silicon or phosphorus atom.

The polar waxes may especially be hydrocarbon-based, fluoro or silicone waxes.

Preferentially, the polar waxes may be hydrocarbon-based waxes.

The term "hydrocarbon-based wax" means a wax formed essentially from, or even constituted of, carbon and hydrogen atoms, and optionally oxygen and nitrogen atoms, and not containing any silicon or fluorine atoms. It may contain alcohol, ester, ether, carboxylic acid, amine and/or amide groups. According to the invention, the term "ester wax" means a wax comprising at least one ester function. According to the invention, the term "alcohol wax" means a wax comprising at least one alcohol function, i.e. comprising at least one free hydroxyl (OH) group.

The following may especially be used as ester wax:

- ester waxes such as those chosen from:

i) waxes of formula R₁COOR₂ in which Ri and R₂ represent linear, branched or cyclic aliphatic chains in which the number of atoms ranges from 10 to 50, which may contain a heteroatom such as O, N or P and whose melting point ranges from 25 to 120°C;

ii) bis(l,l, l-trimethylolpropane) tetrastearate, sold under the name Hest 2T- 4S^® by the company Heterene;

iii) diester waxes of a dicarboxylic acid of general formula R -(-OCO-R⁴- COO-R⁵), in which R³ and R⁵ are identical or different, preferably identical, and represent a C₄-C30 alkyl group (alkyl group comprising from 4 to 30 carbon atoms) and R⁴ represents a linear or branched C₄-C30 aliphatic group (alkyl group comprising from 4 to 30 carbon atoms) which may or may not comprise one or more unsaturations and which is preferably linear and unsaturated;

iv) mention may also be made of the waxes obtained by catalytic hydrogenation of animal or plant oils having linear or branched C8-C32 fatty chains, for example such as hydrogenated jojoba oil, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated coconut oil, and also the waxes obtained by hydrogenation of castor oil esterified with cetyl alcohol;

v) beeswax, synthetic beeswax, polyglycerolated beeswax, carnauba wax, candelilla wax, oxypropylenated lanolin wax, rice bran wax, ouricury wax, esparto grass wax, cork fibre wax, sugar cane wax, Japan wax, sumach wax, montan wax, orange wax, laurel wax, hydrogenated jojoba wax, sunflower wax, lemon wax, olive wax or berry wax.

According to another embodiment, the polar wax can be an alcohol wax. According to the invention, the term "alcohol wax" means a wax comprising at least one alcohol function, i.e. comprising at least one free hydroxyl (OH) group. Alcohol waxes that may be mentioned include for example the C30-50 wax Performacol 550 Alcohol from

New Phase Technologies, stearyl alcohol and cetyl alcohol.

It is also possible to use silicone waxes, which may advantageously be substituted polysiloxanes, preferably of low melting point.

The term "silicone wax" means a wax comprising at least one silicon atom, and especially comprising Si-0 groups.

Among the commercial silicone waxes of this type, mention may be made especially of those sold under the names Abilwax 9800, 9801 or 9810 (Goldschmidt),

KF910 and KF7002 (Shin-Etsu), or 176-1118-3 and 176-11481 (General Electric).

The silicone waxes that may be used may also be alkyl or alkoxy dimethicones, and also (C2o-C6o)alkyl dimethicones, in particular (C₃o-C4₅)alkyl dimethicones, such as the silicone wax sold under the name SF-1642 by the company GE-Bayer Silicones or C₃o-45 alkyl dimethylsilyl polypropylsilsesquioxane sold under the name SW-8005^® C30 Resin

Wax by the company Dow Corning.

In the context of the present invention, particularly advantageous waxes that may be mentioned include polyethylene waxes, jojoba wax, candelilla wax and silicone waxes, in particular candelilla wax.

They may be present in the oily phase in a proportion of from 0.5% to 30% by weight relative to the weight of the oily phase, for example between 5% and 20% of the oily phase and more particularly from 2% to 15% by weight relative to the weight of the oily phase.

Modified clays

The composition according to the invention may comprise at least one lipophilic clay.

The clays may be natural or synthetic, and they are made lipophilic by treatment with an alkylammonium salt such as a C₁₀ to C22 ammonium chloride, for example distearyldimethylammonium chloride.

They may be chosen from bentonites, in particular hectorites and montmorillonites, beidellites, saponites, nontronites, sepiolites, biotites, attapulgites, vermiculites and zeolites.

They are preferably chosen from hectorites. Hectorites modified with a C₁₀ to C22 ammonium chloride, for instance hectorite modified with distearyldimethylammonium chloride, for instance the product sold under the name Bentone 38V^® by the company Elementis or bentone gel in isododecane sold under the name Bentone Gel ISD V® (87% isododecane/10% disteardimonium hectorite/3% propylene carbonate) by the company Elementis, are preferably used as lipophilic clays.

Lipophilic clay may especially be present in a content ranging from 0.1% to 15%) by weight, particularly from 0.5% to 10%> and more particularly from 1%> to 10%> by weight relative to the total weight of the oily phase.

Silicas

The oily phase of a composition according to the invention may also comprise, as gelling agent, a fumed silica or silica aerogel particles. a) Fumed silica

Fumed silica which has undergone a hydrophobic surface treatment is most particularly suitable for use in the invention. Specifically, it is possible to chemically modify the surface of silica, by chemical reaction generating a reduced number of silanol groups present at the surface of the silica. Silanol groups can in particular be replaced by hydrophobic groups: a hydrophobic silica is then obtained.

The hydrophobic groups may be:

- trimethylsiloxyl groups, which are obtained in particular by treating fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are known as "silica silylate" according to the CTFA (8th edition, 2000). They are sold, for example, under the references Aerosil R812^® by the company Degussa, and Cab-O-Sil TS-530^® by the company Cabot;

- dimethylsilyloxyl or poly dimethyl siloxane groups, which are obtained in particular by treating fumed silica in the presence of polydimethylsiloxane or dimethyldichlorosilane. Silicas thus treated are named "Silica dimethyl silylate" according to the CTFA (8th edition, 2000). They are, for example, sold under the references Aerosil R972^® and Aerosil R974^® by the company Degussa and Cab-O-Sil TS-610^® and Cab-O- Sil TS-720^® by the company Cabot. The fumed silicas may be present in a composition according to the present invention in a content of between 0.1% and 40% by weight, more particularly between 1% and 15%) by weight and even more particularly between 2% and 10%> by weight relative to the total weight of the oily phase. b) Hydrophobic silica aerogels

The oily phase of a composition according to the invention may also comprise, as gelling agent, at least silica aerogel particles.

Silica aerogels are porous materials obtained by replacing (by drying) the liquid component of a silica gel with air.

They are generally synthesized via a sol-gel process in a liquid medium and then dried, usually by extraction with a supercritical fluid, the one most commonly used being supercritical C0₂. This type of drying makes it possible to avoid the contraction of the pores and of the material. The sol-gel process and the various drying operations are described in detail in Brinker C.J. and Scherer G.W., Sol-Gel Science, New York: Academic Press, 1990.

The hydrophobic silica aerogel particles used in the present invention have a specific surface area per unit of mass (SM) ranging from 500 to 1500 m²/g, preferably from 600 to 1200 m²/g and better still from 600 to 800 m²/g, and a size expressed as the volume-mean diameter (D[0.5]) ranging from 1 to 1500 μπι, better still from 1 to 1000 μπι, preferably from 1 to 100 μπι, in particular from 1 to 30 μπι, more preferably from 5 to 25 μπι, better still from 5 to 20 μπι and even better still from 5 to 15 μπι.

According to one embodiment, the hydrophobic silica aerogel particles used in the present invention have a size expressed as the volume-mean diameter (D[0.5]) ranging from 1 to 30 μπι, preferably from 5 to 25 μπι, better still from 5 to 20 μπι and even better still from 5 to 15 μπι.

The specific surface area per unit of mass may be determined by the nitrogen absorption method, known as the BET (Brunauer-Emmett-Teller) method, described in the Journal of the American Chemical Society, Vol. 60, page 309, February 1938, which corresponds to international standard ISO 5794/1 (appendix D). The BET specific surface area corresponds to the total specific surface area of the particles under consideration. The sizes of the silica aerogel particles may be measured by static light scattering using a commercial particle size analyser such as the MasterSizer 2000 machine from Malvern. The data are processed on the basis of the Mie scattering theory. This theory, which is exact for isotropic particles, makes it possible to determine, in the case of non-spherical particles, an "effective" particle diameter. This theory is especially described in the publication by Van de Hulst, H.C., Light Scattering by Small Particles, Chapters 9 and 10, Wiley, New York, 1957.

According to an advantageous embodiment, the hydrophobic silica aerogel particles used in the present invention have a specific surface area per unit of mass (SM) ranging from 600 to 800 m²/g.

The silica aerogel particles used in the present invention may advantageously have a tapped density p ranging from 0.02 g/cm³ to 0.10 g/cm³, preferably from 0.03 g/cm³ to 0.08 g/cm³ and in particular ranging from 0.05 g/cm³ to 0.08 g/cm³.

In the context of the present invention, this density may be assessed according to the following protocol, known as the tapped density protocol:

40 g of powder are poured into a measuring cylinder; the measuring cylinder is then placed on a Stav 2003 machine from Stampf Volumeter; the measuring cylinder is then subjected to a series of 2500 tapping actions (this operation is repeated until the difference in volume between two consecutive tests is less than 2%); the final volume Vf of tapped powder is then measured directly on the measuring cylinder. The tapped density is determined by the ratio m/Vf, in this instance 40/Vf (Vf being expressed in cm³ and m in g).

According to one preferred embodiment, the hydrophobic silica aerogel particles used in the present invention have a specific surface area per unit of volume SV ranging from 5 to 60 m²/cm³, preferably from 10 to 50 m²/cm³ and better still from 15 to 40 m²/cm³.

The specific surface area per unit of volume is given by the relationship: Sy = S_M X p; where p is the tapped density, expressed in g/cm³, and S_M is the specific surface per unit of mass, expressed in m²/g, as defined above.

Preferably, the hydrophobic silica aerogel particles according to the invention have an oil-absorbing capacity, measured at the wet point, ranging from 5 to 18 ml/g, preferably from 6 to 15 ml/g and better still from 8 to 12 ml/g. The absorption capacity measured at the wet point, denoted Wp, corresponds to the amount of oil which it is necessary to add to 100 g of particles in order to obtain a homogeneous paste.

It is measured according to the "wet point" method or method for determining the oil uptake of a powder described in Standard F T 30-022. It corresponds to the amount of oil adsorbed onto the available surface of the powder and/or absorbed by the powder by measuring the wet point, described below:

An amount w = 2 g of powder is placed on a glass plate and then the oil (isononyl isononanoate) is added dropwise. After addition of 4 to 5 drops of oil to the powder, mixing is performed using a spatula, and addition of oil is continued until conglomerates of oil and powder have formed. From this point, the oil is added one drop at a time and the mixture is then triturated with the spatula. The addition of oil is stopped when a firm, smooth paste is obtained. This paste must be able to be spread over the glass plate without cracks or the formation of lumps. The volume Vs (expressed in ml) of oil used is then noted.

The oil uptake corresponds to the ratio Vs/m.

The aerogels used according to the present invention are aerogels of hydrophobic silica, preferably of silylated silica (INCI name: silica silylate).

The term "hydrophobic silica" means any silica whose surface is treated with silylating agents, for example halogenated silanes such as alkylchlorosilanes, siloxanes, in particular dimethylsiloxanes such as hexamethyldisiloxane, or silazanes, so as to functionalize the OH groups with silyl groups Si-Rn, for example trimethylsilyl groups.

As regards the preparation of hydrophobic silica aerogel particles surface- modified by silylation, reference may be made to document US 7 470 725.

Use will preferably be made of hydrophobic silica aerogel particles surface- modified with trimethylsilyl groups, preferably of the INCI name Silica silylate.

As hydrophobic silica aerogels that may be used in the invention, an example that may be mentioned is the aerogel sold under the name VM-2260 or VM-2270 (INCI name: Silica silylate), by the company Dow Corning, the particles of which have a mean size of about 1000 microns and a specific surface area per unit of mass ranging from 600 to 800 m²/g. Mention may also be made of the aerogels sold by the company Cabot under the references Aerogel TLD 201, Aerogel OGD 201, Aerogel TLD 203, Enova® Aerogel MT 1100 and Enova Aerogel MT 1200.

Use will preferably be made of the aerogel sold under the name VM-2270 (INCI name: Silica silylate), by the company Dow Corning, the particles of which have an average size ranging from 5-15 microns and a specific surface area per unit of mass ranging from 600 to 800 m²/g.

Preferably, the hydrophobic silica aerogel particles are present in the composition according to the invention in a solids content ranging from 0.1% to 8% by weight, preferably from 0.2% to 5% by weight and preferably from 0.2% to 3% by weight relative to the total weight of the oily phase.

II. Organopolvsiloxane elastomer

The organopolysiloxane elastomer that may be used as lipophilic gelling agent has the advantage of giving the composition according to the invention good application properties. It affords a very gentle feel and a matt effect after application, which is advantageous especially for application to the skin, in particular for foundation compositions. It may also allow efficient filling of the hollows present on keratin materials.

The term "organopolysiloxane elastomer" or "silicone elastomer" means a supple, deformable organopolysiloxane with viscoelastic properties and especially with the consistency of a sponge or a supple sphere. Its modulus of elasticity is such that this material withstands deformation and has a limited ability to extend and to contract. This material is capable of regaining its original shape after stretching.

It is more particularly a crosslinked organopolysiloxane elastomer. Thus, the organopolysiloxane elastomer may be obtained by crosslinking addition reaction of diorganopolysiloxane containing at least one hydrogen bonded to silicon and of diorganopolysiloxane containing ethylenically unsaturated groups bonded to silicon, especially in the presence of a platinum catalyst; or by dehydrogenation crosslinking condensation reaction between a diorganopolysiloxane containing hydroxyl end groups and a diorganopolysiloxane containing at least one hydrogen bonded to silicon, especially in the presence of an organotin; or by crosslinking condensation reaction of a diorganopolysiloxane containing hydroxyl end groups and of a hydrolysable organopolysilane; or by thermal crosslinking of organopolysiloxane, especially in the presence of an organoperoxide catalyst; or by crosslinking of organopolysiloxane via high- energy radiation such as gamma rays, ultraviolet rays or an electron beam.

Preferably, the organopolysiloxane elastomer is obtained by crosslinking addition reaction (A) of diorganopolysiloxane containing at least two hydrogens each bonded to a silicon, and (B) of diorganopolysiloxane containing at least two ethylenically unsaturated groups bonded to silicon, especially in the presence (C) of a platinum catalyst, as described, for instance, in patent application EP-A-295 886.

In particular, the organopolysiloxane elastomer may be obtained by reaction of dimethylpolysiloxane containing dimethylvinylsiloxy end groups and of methylhydrogenopolysiloxane containing trimethylsiloxy end groups, in the presence of a platinum catalyst.

Compound (A) is the base reagent for the formation of organopolysiloxane elastomer, and the crosslinking is performed by addition reaction of compound (A) with compound (B) in the presence of the catalyst (C).

Compound (A) is in particular an organopolysiloxane containing at least two hydrogen atoms bonded to different silicon atoms in each molecule.

Compound (A) can exhibit any molecular structure, in particular a linear chain or branched chain structure or a cyclic structure.

Compound (A) can have a viscosity at 25°C ranging from 1 to 50 000 centistokes, in particular in order to be satisfactorily miscible with compound (B).

The organic groups bonded to the silicon atoms of compound (A) may be alkyl groups such as methyl, ethyl, propyl, butyl, octyl; substituted alkyl groups such as 2- phenylethyl, 2-phenylpropyl or 3,3,3-trifluoropropyl; aryl groups such as phenyl, tolyl, xylyl; substituted aryl groups such as phenylethyl; and substituted monovalent hydrocarbon-based groups such as an epoxy group, a carboxylate ester group or a mercapto group.

Compound (A) may thus be chosen from methylhydrogenopolysiloxanes containing trimethylsiloxy end groups, dimethylsiloxane-methylhydrogenosiloxane copolymers containing trimethylsiloxy end groups, and dimethylsiloxane- methylhydrogenosiloxane cyclic copolymers. Compound (B) is advantageously a diorganopolysiloxane containing at least two lower alkenyl groups (for example C2-C4); the lower alkenyl group may be chosen from vinyl, allyl and propenyl groups. These lower alkenyl groups may be located in any position of the organopolysiloxane molecule, but are preferably located at the ends of the organopolysiloxane molecule. The organopolysiloxane (B) can have a branched-chain, linear-chain, cyclic or network structure but the linear-chain structure is preferred. Compound (B) may have a viscosity ranging from the liquid state to the gum state. Preferably, compound (B) has a viscosity of at least 100 centistokes at 25°C.

Besides the abovementioned alkenyl groups, the other organic groups bonded to the silicon atoms in compound (B) may be alkyl groups such as methyl, ethyl, propyl, butyl or octyl; substituted alkyl groups such as 2-phenylethyl, 2-phenylpropyl or 3,3,3- trifluoropropyl; aryl groups such as phenyl, tolyl or xylyl; substituted aryl groups such as phenylethyl; and substituted monovalent hydrocarbon-based groups such as an epoxy group, a carboxylate ester group or a mercapto group.

The organopolysiloxanes (B) may be chosen from methylvinylpolysiloxanes, methylvinylsiloxane-dimethylsiloxane copolymers, dimethylpolysiloxanes containing dimethylvinylsiloxy end groups, dimethylsiloxane-methylphenylsiloxane copolymers containing dimethylvinylsiloxy end groups, dimethylsiloxane-diphenylsiloxane- methylvinylsiloxane copolymers containing dimethylvinylsiloxy end groups, dimethylsiloxane-methylvinylsiloxane copolymers containing trimethylsiloxy end groups, dimethylsiloxane-methylphenylsiloxane-methylvinylsiloxane copolymers containing trimethylsiloxy end groups, methyl(3,3,3-trifluoropropyl)polysiloxanes containing dimethylvinylsiloxy end groups, and dimethylsiloxane-methyl(3,3,3- trifluoropropyl)siloxane copolymers containing dimethylvinylsiloxy end groups.

In particular, the organopolysiloxane elastomer can be obtained by reaction of dimethylpolysiloxane comprising dimethylvinylsiloxy end groups and of methylhydrogenopolysiloxane comprising trimethylsiloxy end groups, in the presence of a platinum catalyst.

Advantageously, the sum of the number of ethylenic groups per molecule of the compound (B) and of the number of hydrogen atoms bonded to silicon atoms per molecule of the compound (A) is at least 5. It is advantageous for compound (A) to be added in an amount such that the molecular ratio of the total amount of hydrogen atoms bonded to silicon atoms in compound (A) and the total amount of all the ethylenically unsaturated groups in compound (B) is within the range from 1.5/1 to 20/1.

Compound (C) is the catalyst for the crosslinking reaction, and is especially chloroplatinic acid, chloroplatinic acid/olefin complexes, chloroplatinic acid/alkenylsiloxane complexes, chloroplatinic acid/diketone complexes, platinum black and platinum on a support.

The catalyst (C) is preferably added in an amount of from 0.1 to 1000 parts by weight and better still from 1 to 100 parts by weight, as clean platinum metal, per 1000 parts by weight of the total amount of compounds (A) and (B).

The elastomer is advantageously a non-emulsifying elastomer.

The term "non-emulsifying" defines organopolysiloxane elastomers not containing any hydrophilic chains, and in particular not containing any polyoxyalkylene units (especially polyoxy ethylene or polyoxy propylene) or any polyglyceryl units. Thus, according to one particular mode of the invention, the composition comprises an organopolysiloxane elastomer free of polyoxyalkylene units and of polyglyceryl units.

In particular, the silicone elastomer used in the present invention is chosen from Dimethicone Crosspolymer (INCI name), Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone/Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone Crosspolymer-3 (INCI name).

The organopolysiloxane elastomer particles may be conveyed in the form of a gel formed from an elastomeric organopolysiloxane included in at least one hydrocarbon- based oil and/or one silicone oil. In these gels, the organopolysiloxane particles are often nonspherical particles.

Non-emulsifying elastomers are described especially in patents EP 242 219, EP 285 886 and EP 765 656 and in patent application JP-A-61-194009.

The silicone elastomer is generally in the form of a gel, a paste or a powder, but advantageously in the form of a gel in which the silicone elastomer is dispersed in a linear silicone oil (dimethicone) or cyclic silicone oil (e.g. : cyclopentasiloxane), advantageously in a linear silicone oil. Non-emulsifying elastomers that may be used more particularly include those sold under the names KSG-6, KSG-15, KSG-16, KSG-18, KSG-41, KSG-42, KSG-43 and KSG-44 by the company Shin-Etsu, DC9040 and DC9041 by the company Dow Corning, and SFE 839 by the company General Electric.

According to another alternative, the composition according to the invention may comprise an organopolysiloxane elastomer having the INCI name 'Polysilicone 11 ', such as those sold under the name Gransil by Grant Industries.

According to a particular mode, use is made of a gel of silicone elastomer dispersed in a silicone oil chosen from a non-exhaustive list comprising cyclopentadimethylsiloxane, dimethicones, dimethylsiloxanes, methyl trimethicone, phenyl methicone, phenyl dimethicone, phenyl trimethicone and cyclomethicone, preferably a linear silicone oil chosen from polydimethylsiloxanes (PDMS) or dimethicones with a viscosity at 25°C ranging from 1 to 500 cSt, optionally modified with optionally fluorinated aliphatic groups, or with functional groups such as hydroxyl, thiol and/or amine groups.

Mention may be made especially of the compounds having the following INCI names:

- dimethicone/Vinyl Dimethicone Crosspolymer, such as USG-105 and USG-107A from the company Shin-Etsu; DC9506 and DC9701 from the company Dow Corning;

- dimethicone/vinyl dimethicone crosspolymer (and) dimethicone, such as KSG-6 and KSG-16 from the company Shin-Etsu;

- dimethicone/vinyl dimethicone crosspolymer (and) cyclopentasiloxane, such as KSG-15;

- cyclopentasiloxane (and) dimethicone crosspolymer, such as DC9040, DC9045 and

DC5930 from the company Dow Corning;

- dimethicone (and) dimethicone crosspolymer, such as DC9041 from the company Dow Corning;

- dimethicone (and) dimethicone crosspolymer, such as Dow Corning EL-9240^® silicone elastomer blend from the company Dow Corning (mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (2 cSt)),

- C4-24 alkyl dimethicone/divinyl dimethicone crosspolymer, such as NuLastic Silk MA from the company Alzo. As examples of silicone elastomers dispersed in a linear silicone oil that may advantageously be used according to the invention, mention may especially be made of the following references:

- dimethicone (and) dimethicone crosspolymer, such as DC9041 from the company Dow

Corning; and

- dimethicone (and) dimethicone crosspolymer, such as Dow Corning EL-9240^® silicone elastomer blend from the company Dow Corning.

According to a preferred embodiment, the composition according to the invention comprises at least one crosslinked silicone elastomer having the INCI name 'dimethicone crosspolymer' or 'dimethicone (and) dimethicone crosspolymer', with preferably a dimethicone having a viscosity ranging from 1 to 100 cSt, in particular from 1 to 10 cSt at 25°C, such as the mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (5 cSt) sold under the name DC 9041 Dow Corning or the mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (2 cSt) sold under the name Dow Corning EL-9240^® silicone elastomer blend Dow Corning.

According to a particularly preferred embodiment, the composition according to the invention comprises at least one crosslinked silicone elastomer having the INCI name "dimethicone (and) dimethicone crosspolymer", with preferably a dimethicone having a viscosity ranging from 1 to 100 cSt, in particular from 1 to 10 cSt at 25°C, such as the mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (5 cSt) sold under the name DC 9041 by the company Dow Corning.

The organopolysiloxane elastomer particles may also be used in powder form: mention may be made especially of the powders sold under the names Dow Corning 9505 Powder and Dow Corning 9506 Powder by the company Dow Corning, these powders having the INCI name: dimethicone/vinyl dimethicone crosspolymer.

The organopolysiloxane powder may also be coated with silsesquioxane resin, as described, for example, in patent US 5 538 793. Such elastomeric powders are sold under the names KSP-lOO, KSP-101, KSP-102, KSP-103, KSP-104 and KSP-105 by the company Shin-Etsu, and have the INCI name: vinyl dimethicone/methicone silsesquioxane crosspolymer.

As preferred lipophilic gelling agents of organopolysiloxane elastomer type, mention may be made more particularly of crosslinked organopolysiloxane elastomers chosen from Dimethicone Crosspolymer (INCI name), Dimethicone (and) Dimethicone Crosspolymer (INCI name), Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone/Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone Crosspolymer- 3 (INCI name), and in particular mention be made of Dimethicone Crosspolymer (INCI name).

The organopolysiloxane elastomer may be present in a composition according to the present invention in a content of between 0.5% and 35% by weight of solids and especially between 2% and 15% by weight relative to the total weight of the oily phase. III. Semi-crystalline polymers

The composition according to the invention may comprise at least one semi- crystalline polymer. Preferably, the semi-crystalline polymer has an organic structure, and a melting point of greater than or equal to 30°C.

For the purposes of the invention, the term "semi-crystalline polymer" means polymers comprising a crystallizable portion and an amorphous portion and having a first- order reversible change of phase temperature, in particular of melting point (solid-liquid transition). The crystallizable portion is either a side chain (or pendent chain) or a block in the backbone.

When the crystallizable portion of the semi-crystalline polymer is a block of the polymer backbone, this crystallizable block has a chemical nature different than that of the amorphous blocks; in this case, the semi-crystalline polymer is a block copolymer, for example of the diblock, triblock or multiblock type. When the crystallizable portion is a chain that is pendent on the backbone, the semi-crystalline polymer may be a homopolymer or a copolymer.

The melting point of the semi-crystalline polymer is preferably less than

150°C. The melting point of the semi-crystalline polymer is preferably greater than or equal to 30°C and less than 100°C. More preferably, the melting point of the semi- crystalline polymer is greater than or equal to 30°C and less than 70°C.

The semi-crystalline polymer(s) according to the invention are solid at room temperature (25°C) and atmospheric pressure (760 mmHg), with a melting point of greater than or equal to 30°C. The melting point values correspond to the melting point measured using a differential scanning calorimeter (DSC), such as the calorimeter sold under the name DSC 30 by the company Mettler, with a temperature rise of 5°C or 10°C per minute. (The melting point under consideration is the point corresponding to the temperature of the most endothermic peak in the thermogram).

The semi-crystalline polymer(s) according to the invention preferably have a melting point that is higher than the temperature of the keratinous support intended to receive the said composition, in particular the skin or the lips.

According to the invention, the semi-crystalline polymers are advantageously soluble in the fatty phase, especially to at least 1% by weight, at a temperature that is higher than their melting point. Besides the crystallizable chains or blocks, the blocks of the polymers are amorphous.

For the purposes of the invention, the term "crystallizable chain or block" means a chain or block which, if it were alone, would change from the amorphous state to the crystalline state reversibly, depending on whether the temperature is above or below the melting point. For the purposes of the invention, a "chain" is a group of atoms, which are pendent or lateral relative to the polymer backbone. A block is a group of atoms belonging to the backbone, this group constituting one of the repeating units of the polymer.

Preferably, the polymer backbone of the semi-crystalline polymers is soluble in the fatty phase at a temperature above their melting point.

Preferably, the crystallizable blocks or chains of the semi-crystalline polymers represent at least 30% of the total weight of each polymer and better still at least 40%. The semi-crystalline polymers containing crystallizable side chains are homopolymers or copolymers. The semi-crystalline polymers of the invention containing crystallizable blocks are block or multiblock copolymers. They may be obtained via polymerization of a monomer containing reactive double bonds (or ethylenic bonds) or via polycondensation. When the polymers of the invention are polymers having crystallizable side chains, these side chains are advantageously in random or statistical form.

Preferably, the semi-crystalline polymers of the invention are of synthetic origin.

According to a preferred embodiment, the semi-crystalline polymer is chosen from:

- homopolymers and copolymers comprising units resulting from the polymerization of one or more monomers bearing crystallizable hydrophobic side chain(s),

- polymers bearing in the backbone at least one crystallizable block, - poly condensates of aliphatic or aromatic or aliphatic/aromatic polyester type,

- copolymers of ethylene and propylene prepared via metallocene catalysis, and

- acrylate/silicone copolymers.

The semi-crystalline polymers that may be used in the invention may be chosen in particular from:

- block copolymers of polyolefins of controlled crystallization, whose monomers are described in EP-A-0 951 897,

- polycondensates, especially of aliphatic or aromatic or aliphatic/aromatic polyester type,

- copolymers of ethylene and propylene prepared via metallocene catalysis, - homopolymers or copolymers bearing at least one crystallizable side chain and homopolymers or copolymers bearing in the backbone at least one crystallizable block, such as those described in document US-A-5 156 91 1, such as the (Cio-C₃o)alkyl polyacrylates corresponding to the Intelimer^® products from the company Landec described in the brochure Intelimer^® Polymers, Landec IP22 (Rev. 4-97), for example the product Intelimer^® IP A 13-1 from the company Landec, which is a polystearyl acrylate with a molecular weight of about 145 000 and a melting point of 49°C,

- homopolymers or copolymers bearing at least one crystallizable side chain, in particular containing fluoro group(s), as described in document WO-A-01/19333,

- acrylate/silicone copolymers, such as copolymers of acrylic acid and of stearyl acrylate bearing polydimethylsiloxane grafts, copolymers of stearyl methacrylate bearing polydimethylsiloxane grafts, copolymers of acrylic acid and of stearyl methacrylate bearing polydimethylsiloxane grafts, copolymers of methyl methacrylate, butyl methacrylate, 2-ethylhexyl acrylate and stearyl methacrylate bearing polydimethylsiloxane grafts. Mention may be made in particular of the copolymers sold by the company Shin-Etsu under the names KP-561 (CTFA name: acrylates/dimethicone), KP-541 (CTFA name: acrylates/dimethicone and isopropyl alcohol), KP-545 (CTFA name: acrylates/dimethicone and cyclopentasiloxane),

- and mixtures thereof.

Preferably, the amount of semi-crystalline polymer(s), preferably chosen from semi-crystalline polymers bearing crystallizable side chains, represents from 0.1% to 30%> by weight of solids relative to the total weight of the oily phase, for example from 0.5% to 25%) by weight, better still from 5% to 20% or even from 5% to 12% by weight, relative to the total weight of the oily phase.

IV. Dextrin esters

The composition according to the invention may comprise as lipophilic gelling agent at least one dextrin ester.

In particular, the composition preferably comprises at least one preferably C₁₂ to C₂4 and in particular C₁₄-C₁₈ fatty acid ester of dextrin, or mixtures thereof.

Preferably, the dextrin ester is an ester of dextrin and of a C₁₂-C₁₈ and in particular C₁₄-C₁₈ fatty acid.

Preferably, the dextrin ester is chosen from dextrin myristate and/or dextrin palmitate, and mixtures thereof.

According to a particular embodiment, the dextrin ester is dextrin myristate, such as the product sold especially under the name Rheopearl MKL-2 by the company Chiba Flour Milling.

According to a preferred embodiment, the dextrin ester is dextrin palmitate.

This product may be chosen, for example, from those sold under the names Rheopearl

® ® ®

TL , Rheopearl KL and Rheopearl KL2 by the company Chiba Flour Milling.

In a particularly preferred manner, the oily phase of a composition according to the invention may comprise from 0.1% to 30% by weight, preferably from 2% to 25% and preferably from 7.5% to 17% by weight of dextrin ester(s) relative to the total weight of the oily phase. In a particularly preferred manner, the composition according to the invention may comprise between 0.1% and 10%> by weight and preferably between 0.5% and 5% by weight of dextrin palmitate relative to the total weight of the oily phase. The dextrin palmitate may especially be the product sold under the names Rheopearl TL^®, Rheopearl KL^® or Rheopearl^® KL2 by the company Chiba Flour Milling.

V. Hydrogen bonding polymers

As representatives of hydrogen bonding polymers that are suitable for use in the invention, mention may be made most particularly of polyamides and in particular hydrocarbon-based polyamides and silicone polyamides.

Polyamides

The oily phase of a composition according to the invention may comprise at least one polyamide chosen from hydrocarbon-based polyamides and silicone polyamides, and mixtures thereof.

Preferably, the total content of polyamide(s) is between 0.1%> and 30%> by weight expressed as solids, preferably between 0.1%> and 20% by weight and preferably between 0.5% and 10% by weight relative to the total weight of the oily phase.

For the purposes of the invention, the term "polyamide" means a compound containing at least two repeating amide units, preferably at least three repeating amide units and better still ten repeating amide units. a) Hydrocarbon-based polyamide

The term "hydrocarbon-based polyamide" means a polyamide formed essentially of, indeed even consisting of, carbon and hydrogen atoms, and optionally of oxygen or nitrogen atoms, and not comprising any silicon or fluorine atoms. It may contain alcohol, ester, ether, carboxylic acid, amine and/or amide groups.

For the purposes of the invention, the term "functionalized chain" means an alkyl chain comprising one or more functional groups or reagents chosen especially from hydroxyl, ether, ester, oxyalkylene and polyoxyalkylene groups.

Advantageously, this polyamide of the composition according to the invention has a weight-average molecular mass of less than 100 000 g/mol (especially ranging from 1000 to 100 000 g/mol), in particular less than 50 000 g/mol (especially ranging from 1000 to 50 000 g/mol) and more particularly ranging from 1000 to 30 000 g/mol, preferably from 2000 to 20 000 g/mol and better still from 2000 to 10 000 g/mol.

This polyamide is insoluble in water, in particular at 25°C.

According to a first embodiment of the invention, the polyamide used is a polyamide of formula (I):

X - -C— FL-C— H -R- - n — R— C - o o 0 o CO in which X represents a group -N(R₁)₂ or a group -ORi in which Ri is a linear or branched C₈ to C₂₂ alkyl radical which may be identical or different, R₂ is a C28-C42 diacid dimer residue, R₃ is an ethylenediamine radical and n is between 2 and 5;

- and mixtures thereof.

According to a particular mode, the polyamide used is an amide-terminated polyamide of formula (la):

X - -C— R^- C— NH - R— N H - - C— R— C -X

n I I * I I

o o o (la)

in which X represents a group -N(R₁)₂ in which Ri is a linear or branched C₈ to C₂₂ alkyl radical which may be identical or different, R₂ is a C₂₈-C₄₂ diacid dimer residue, R₃ is an ethylenediamine radical and n is between 2 and 5;

- and mixtures thereof.

The oily phase of a composition according to the invention may also comprise, additionally in this case, at least one additional polyamide of formula (lb):

X - -C— ₂- C— H - R— N H^■ ^■ C RLT_> C X

^{0 0 0} Cflo

in which X represents a group -ORi in which Ri is a linear or branched C₈ to C₂₂ and preferably C₁₆ to C₂₂ alkyl radical which may be identical or different, R₂ is a C₂₈-C₄₂ diacid dimer residue, R₃ is an ethylenediamine radical and n is between 2 and 5, such as the commercial products sold by the company Arizona Chemical under the names Uniclear 80 and Uniclear 100 or Uniclear 80 V, Uniclear 100 V and Uniclear 100 VG, the INCI name of which is Ethylenediamine/stearyl dimer dilinoleate copolymer. b) Silicone polyamide

The silicone polyamides are preferably solid at room temperature (25°C) and atmospheric pressure (760 mmHg).

The silicone polyamides may preferentially be polymers comprising at least one unit of formula (III) or (IV):

OS)

or

(IV) in which:

• R⁴, R⁵, R⁶ and R⁷, which may be identical or different, represent a group chosen from:

- saturated or unsaturated, Ci to C₄₀ linear, branched or cyclic hydrocarbon-based groups, which may contain in their chain one or more oxygen, sulfur and/or nitrogen atoms, and which may be partially or totally substituted with fluorine atoms,

- C₆to Cio aryl groups, optionally substituted with one or more Ci to C₄ alkyl groups,

- polyorganosiloxane chains possibly containing one or more oxygen, sulfur and/or nitrogen atoms, • the groups X, which may be identical or different, represent a linear or branched Ci to C30 alkylenediyl group, possibly containing in its chain one or more oxygen and/or nitrogen atoms,

• Y is a saturated or unsaturated Ci to C50 linear or branched alkylene, arylene, cycloalkylene, alkylarylene or arylalkylene divalent group, which may comprise one or more oxygen, sulfur and/or nitrogen atoms, and/or may bear as substituent one of the following atoms or groups of atoms: fluorine, hydroxyl, C₃ to C₈ cycloalkyl, Ci to C40 alkyl, C₅ to C10 aryl, phenyl optionally substituted with one to three Ci to C₃ alkyl, Ci to C₃ hydroxyalkyl and Ci to C₆ aminoalkyl groups, or

Y represents a group corresponding to the formula:

in which:

- T represents a linear or branched, saturated or unsaturated, C₃ to C₂₄ trivalent or tetravalent hydrocarbon-based group optionally substituted with a polyorganosiloxane chain, and possibly containing one or more atoms chosen from O, N and S, or T represents a trivalent atom chosen from N, P and Al, and

- R⁸ represents a linear or branched Ci to C50 alkyl group or a polyorganosiloxane chain, possibly comprising one or more ester, amide, urethane, thiocarbamate, urea, thiourea and/or sulfonamide groups, which may possibly be linked to another chain of the polymer,

• n is an integer ranging from 2 to 500 and preferably from 2 to 200, and m is an integer ranging from 1 to 1000, preferably from 1 to 700 and even better still from 6 to 200.

According to a particular mode, the silicone polyamide comprises at least one unit of formula (III) in which m ranges from 50 to 200, in particular from 75 to 150 and is preferably about 100.

More preferably, R⁴, R⁵, R⁶ and R⁷ independently represent a linear or branched Ci to C40 alkyl group, preferably a group CH₃, C₂H₅, n-C₃H₇ or isopropyl in formula (III). As examples of silicone polymers that may be used, mention may be made of one of the silicone polyamides obtained in accordance with Examples 1 to 3 of document US-A-5 981 680.

Mention may be made of the compounds sold by the company Dow Corning under the names DC 2-8179 (DP 100) and DC 2-8178 (DP 15), the INCI name of which is Nylon-611/dimethicone copolymer, i.e. Nylon-611/dimethicone copolymers. The silicone polymers and/or copolymers advantageously have a temperature of transition from the solid state to the liquid state ranging from 45°C to 190°C. Preferably, they have a temperature of transition from the solid state to the liquid state ranging from 70 to 130°C and better still from 80°C to 105°C.

Preferably, the total content of polyamide(s) and/or silicone polyamide(s) is between 0.5% and 25% by weight of solids, in particular from 2% to 20% by weight and preferably between 2% and 12% by weight relative to the total weight of the oily phase.

Advantageously, the hydrogen bonding polymer is chosen from ethylenediamine/stearyl dimer dilinoleate copolymer and Nylon-611/dimethicone copolymers.

According to an advantageous variant, a composition according to the invention comprises a lipophilic gelling agent chosen from particulate gelling agents, organopolysiloxane elastomers, semi-crystalline polymers, dextrin esters and hydrogen bonding polymers, and mixtures thereof, and in particular at least one organopolysiloxane elastomer. HYDROPHILIC GELLING AGENT|S)/LIPOPHILIC GELLING AGENT(S) SYSTEMS

As preferred synthetic polymeric hydrophilic gelling agents, mention may be made more particularly of 2-acrylamido-2-methylpropanesulfonic acid polymers, for instance AMPS^® and 2-acrylamido-2-methylpropanesulfonic acid copolymers and in particular copolymers of AMPS^® and of hydroxyethyl aciylate, for instance the AMPS^®/hydroxyethyl aciylate copolymer such as that used in the commercial product sold under the name Simulgel NS^® by the company SEPPIC (CTFA name: Hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer (and) squalane (and) polysorbate 60), or such as the product sold under the name Sodium acrylamido-2- methylpropanesulfonate/hydroxyethyl acrylate copolymer, such as the commercial product Sepinov EMT 10 (INCI name: Hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer).

As preferred lipophilic gelling agents of organopolysiloxane elastomer type, mention may be made more particularly of crosslinked organopolysiloxane elastomers chosen from Dimethicone Crosspolymer (INCI name), Dimethicone (and) Dimethicone Crosspolymer (INCI name), Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone/Vinyl Dimethicone Crosspolymer (INCI name), Dimethicone Crosspolymer- 3 (INCI name) , and in particular mention be made of Dimethicone Crosspolymer (INCI name) and Dimethicone (and) Dimethicone Crosspolymer (INCI name).

According to a particular mode, use is made of a gel of silicone elastomer dispersed in a silicone oil chosen from a non-exhaustive list comprising cyclopentadimethylsiloxane, dimethicones, dimethylsiloxanes, methyl trimethicone, phenyl methicone, phenyl dimethicone, phenyl trimethicone and cyclomethicone, preferably a linear silicone oil chosen from polydimethylsiloxanes (PDMS) or dimethicones with a viscosity at 25°C ranging from 1 to 500 cS at 25°C, especially the following references:

Corning; and

- dimethicone (and) dimethicone crosspolymer (INCI name), such as Dow Corning EL- 9240® silicone elastomer blend from the company Dow Corning.

According to a particularly preferred embodiment, the composition according to the invention comprises at least one crosslinked silicone elastomer having the INCI name "dimethicone (and) dimethicone crosspolymer", with preferably a dimethicone having a viscosity ranging from 1 to 100 cSt, in particular from 1 to 10 cSt at 25°C, such as the mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (5 cSt) sold under the name DC 9041 Dow Corning or the mixture of polydimethylsiloxane crosslinked with hexadiene/polydimethylsiloxane (2 cSt) sold under the name Dow Corning EL-9240® silicone elastomer blend from Dow Corning.

As non-limiting illustrations of hydrophilic gelling agent/lipophilic gelling agent systems that are most particularly suitable for use in the invention, mention may be made especially of 2-acrylamido-2-methylpropanesulfonic acid/organopolysiloxane elastomer polymers or copolymers.

Thus, a composition according to the invention may advantageously comprise as hydrophilic gelling agent/lipophilic gelling agent system, a copolymer system of 2- acrylamido-2-methylpropanesulfonic acid and of hydroxy ethyl acrylate/organopolysiloxane elastomer.

COATED PIGMENTS

As stated previously, the claimed compositions comprise at least coated pigments, especially as detailed hereinbelow.

This type of pigment is particularly advantageous since it can be considered in large amount together with a large amount of water. What is more, since they are treated with a hydrophobic compound, they show predominant affinity for the oily gel phase, which can then convey them.

Needless to say, the compositions according to the invention may in parallel contain uncoated pigments.

The term "pigments" means white or coloured, mineral or organic particles, which are insoluble in an aqueous medium, and which are intended to colour and/or opacify the resulting composition and/or film. These pigments may be white or coloured, and mineral and/or organic.

These pigments are more particularly detailed below.

A composition according to the invention contains at least 10% by weight, relative to the total weight of the composition, of these pigments in a form coated with at least one lipophilic or hydrophobic compound, the coating being as described below.

According to a particular embodiment, the coated pigments used according to the invention are chosen from mineral pigments. The term "mineral pigment" means any pigment that satisfies the definition in Ullmann's encyclopaedia in the chapter on mineral pigments. Among the mineral pigments that are useful in the present invention, mention may be made of zirconium oxide or cerium oxide, and also zinc oxide, iron oxide (black, yellow or red) or chromium oxide, manganese violet, ultramarine blue, chromium hydrate and ferric blue, titanium dioxide, and metal powders, for instance aluminium powder or copper powder. The following mineral pigments may also be used: Ta₂0₅, Ti₃0₅, Ti₂0₃, TiO, Zr0₂ as a mixture with Ti0₂, Zr0₂, Nb₂0₅, Ce0₂, ZnS.

The size of the pigment that is useful in the context of the present invention is generally between 10 nm and 10 μπι, preferably between 20 nm and 5 μπι and more preferentially between 30 nm and 1 μπι.

In the context of the present invention, the coated mineral pigments are more particularly iron oxide and/or titanium dioxide.

By way of example, mention may be made more particularly of titanium dioxide and iron oxide coated with aluminium stearoyl glutamate, for example sold under the reference NAI by the company Miyoshi Kasei.

Coating of the pigment

The composition according to the invention comprises at least one pigment coated with at least one lipophilic or hydrophobic compound.

The coating may also comprise at least one additional non-lipophilic compound.

For the purposes of the invention, the "coating" of a pigment according to the invention generally denotes the total or partial surface treatment of the pigment with a surface agent, absorbed, adsorbed or grafted onto the said pigment.

The surface-treated pigments may be prepared according to surface treatment techniques of chemical, electronic, mechanochemical or mechanical nature that are well known to those skilled in the art. Commercial products may also be used.

The surface agent may be absorbed adsorbed or grafted onto the pigments by solvent evaporation, chemical reaction and creation of a covalent bond.

According to one variant, the surface treatment consists of coating of the pigments. The coating may represent from 0.1% to 20% by weight and in particular from 0.5% to 5%) by weight relative to the total weight of the coated pigment.

The coating may be performed, for example, by adsorption of a liquid surface agent onto the surface of the solid particles by simple mixing with stirring of the particles and of the said surface agent, optionally with heating, prior to the incorporation of the particles into the other ingredients of the makeup or care composition.

The coating may be performed, for example, by chemical reaction of a surface agent with the surface of the solid pigment particles and creation of a covalent bond between the surface agent and the particles. This method is especially described in patent US 4 578 266.

The chemical surface treatment may consist in diluting the surface agent in a volatile solvent, dispersing the pigments in this mixture and then slowly evaporating off the volatile solvent, so that the surface agent is deposited at the surface of the pigments. Lipophilic or hydrophobic treatment agent

When the pigment comprises a lipophilic or hydrophobic coating, it is preferably present in the fatty phase of the composition according to the invention.

According to a particular embodiment of the invention, the pigments may be coated according to the invention with at least one compound chosen from silicone surface agents; fluoro surface agents; fluorosilicone surface agents; metal soaps; N-acylamino acids or salts thereof; lecithin and derivatives thereof; isopropyl triisostearyl titanate; isostearyl sebacate; natural plant or animal waxes; polar synthetic waxes; fatty esters; phospholipids; and mixtures thereof. Silicone surface agent

According to a particular embodiment, the pigments may be totally or partially surface-treated with a compound of silicone nature.

The silicone surface agents may be chosen from organopolysiloxanes, silane derivatives, silicone-acrylate copolymers and silicone resins, and mixtures thereof.

The term "organopolysiloxane compound" means a compound having a structure comprising an alternation of silicon atoms and oxygen atoms and comprising organic radicals linked to silicon atoms. i) Non-elastomer ic organopolysiloxane

Non-elastomeric organopolysiloxanes that may especially be mentioned include polydimethylsiloxanes, polymethylhydrogenosiloxanes and polyalkoxydimethylsiloxanes.

The alkoxy group may be represented by the radical R-O- such that R represents methyl, ethyl, propyl, butyl or octyl, 2-phenylethyl, 2-phenylpropyl or 3,3,3- trifluoropropyl radicals, aryl radicals such as phenyl, tolyl or xylyl, or substituted aryl radicals such as phenyl ethyl.

One method for surface-treating pigments with a polymethylhydrogenosiloxane consists in dispersing the pigments in an organic solvent and then in adding the silicone compound. On heating the mixture, covalent bonds are created between the silicone compound and the surface of the pigment.

According to a preferred embodiment, the silicone surface agent may be a non- elastomeric organopolysiloxane, especially chosen from polydimethylsiloxanes. ii) Alkylsilanes and alkoxysilanes

Silanes containing alkoxy functionality are especially described by Witucki in A silane primer, Chemistry and applications of alkoxy silanes, Journal of Coatings Technology, 65, 822, pages 57-60, 1993.

Alkoxysilanes such as the alkyltriethoxysilanes and the alkyltrimethoxysilanes sold under the references Silquest A-137 (OSI Specialities) and Prosil 9202 (PCR) may be used for coating pigments.

Mention may also be made of pigments treated with triethoxycaprylylsilane sold under the references Unipure AS-EM by the company Sensient.

The use of alkylpolysiloxanes containing a reactive end group such as alkoxy, hydroxyl, halogen, amino or imino are described in patent application JP H07-196 946. They are also suitable for treating pigments. in) Silicone-acrylate polymers

Grafted silicone-acrylic polymers having a silicone backbone as described in patents US 5 725 882, US 5 209 924, US 4 972 037, US 4 981 903, US 4 981 902 and US 5 468 477 and in patents US 5 219 560 and EP 0 388 582 may be used.

Other silicone-acrylate polymers may be silicone polymers comprising in their structure the nit of formula I) below:

in which the radicals Gi, which may be identical or different, represent hydrogen or a Ci-Cio alkyl radical or alternatively a phenyl radical; the radicals G₂, which may be identical or different, represent a Ci-Cio alkylene group; G₃ represents a polymeric residue resulting from the (homo)polymerization of at least one ethylenically unsaturated anionic monomer; G₄ represents a polymeric residue resulting from the (homo)polymerization of at least one ethylenically unsaturated hydrophobic monomer; m and n are equal to 0 or 1 ; a is an integer ranging from 0 to 50; b is an integer that may be between 10 and 350, c is an integer ranging from 0 to 50; with the proviso that one of the parameters a and c is other than 0.

Preferably, the unit of formula (I) above has at least one, and even more preferentially all, of the following characteristics:

- the radicals Gi denote an alkyl radical, preferably a methyl radical;

- n is non-zero, and the radicals G₂ represent a divalent Ci-C₃ radical, preferably a propylene radical;

- G₃ represents a polymeric radical resulting from the (homo)polymerization of at least one monomer of the ethylenically unsaturated carboxylic acid type, preferably acrylic acid and/or methacrylic acid;

- G₄ represents a polymeric radical resulting from the (homo)polymerization of at least one monomer of the (Ci-Cio)alkyl (meth)acrylate type, preferably such as isobutyl or methyl (meth)acrylate.

Examples of silicone polymers corresponding to formula (I) are especially polydimethylsiloxanes (PDMS) onto which are grafted, via a connecting chain unit of thiopropylene type, mixed polymer units of the poly(meth)acrylic acid type and of the polymethyl (meth)acrylate type.

Other examples of silicone polymers corresponding to formula (I) are especially polydimethylsiloxanes (PDMS) onto which are grafted, via a connecting chain unit of thiopropylene type, polymer units of the polyisobutyl (meth)acrylate type. iv) Silicone resins

The silicone surface agent may be chosen from silicone resins.

The term "resin" means a three-dimensional structure.

The silicone resins may be soluble or swellable in silicone oils. These resins are crosslinked polyorganosiloxane polymers.

The nomenclature of silicone resins is known under the name "MDTQ", the resin being described as a function of the various siloxane monomer units it comprises, each of the letters "MDTQ" characterizing a type of unit.

The letter M represents the monofunctional unit of formula (CH₃)₃SiOi_/2, the silicon atom being bonded to only one oxygen atom in the polymer comprising this unit.

The letter D means a difunctional unit (CH₃)₂Si0_2/2 in which the silicon atom is bonded to two oxygen atoms.

The letter T represents a trifunctional unit of formula (CH₃)Si0_3/2.

In the units M, D and T defined previously, at least one of the methyl groups may be substituted with a group R other than a methyl group, such as a hydrocarbon-based radical (especially alkyl) containing from 2 to 10 carbon atoms or a phenyl group, or alternatively a hydroxyl group.

Finally, the letter Q means a tetrafunctional unit S1O_4/2 in which the silicon atom is bonded to four hydrogen atoms, which are themselves bonded to the rest of the polymer.

Various resins with different properties may be obtained from these different units, the properties of these polymers varying as a function of the type of monomers (or units), of the type and number of substituted radicals, of the length of the polymer chain, of the degree of branching and of the size of the side chains.

Examples of these silicone resins that may be mentioned include: siloxysilicates, which may be trimethyl siloxysilicates of formula [(CH₃)₃XSiXO]_xX(Si04/2)y (MQ units) in which x and y are integers ranging from 50 to 80,

- polysilsesquioxanes of formula (CH₃Si0₃/2)_x (T units) in which x is greater than 100 and at least one of the methyl radicals of which may be substituted with a group R as defined above,

- polymethylsilsesquioxanes, which are polysilsesquioxanes in which none of the methyl radicals is substituted with another group. Such polymethylsilsesquioxanes are described in document US 5 246 694.

As examples of commercially available polymethylsilsesquioxane resins, mention may be made of those sold:

- by the company Wacker under the reference Resin MK, such as Belsil PMS MK: polymer comprising CH₃Si0₃/2 repeating units (T units), which may also comprise up to 1% by weight of (CH₃)₂Si0₂/2 units (D units) and having an average molecular weight of about 10 000, or

- by the company Shin-Etsu under the reference KR220L, which are composed of units T of formula CH₃Si0₃/2 and have Si-OH (silanol) end groups, under the reference KR242A, which comprise 98% of units T and 2% of dimethyl units D and have Si-OH end groups, or alternatively under the reference KR251 comprising 88% of units T and 12% of dimethyl units D and have Si-OH end groups.

Siloxysilicate resins that may be mentioned include trimethyl siloxysilicate

(TMS) resins, optionally in the form of powders. Such resins are sold under the references

SRIOOO, E 1 170-002 or SS 4230 by the company General Electric or under the references

TMS 803, Wacker 803 and 804 by the company Wacker Silicone Corporation.

Mention may also be made of trimethylsiloxysilicate resins sold in a solvent such as cyclomethicone, sold under the name KF-7312J by the company Shin-Etsu or DC

749 and DC 593 by the company Dow Corning.

As examples of commercial references of pigments treated with a silicone compound, mention may be made of:

- red iron oxide/dimethicone sold under the reference SA-C 338075-10 by the company

Miyoshi Kasei; and - a pigment obtained by treating DC Red 7 with a silicone compound, sold by the company Coletica under the reference Gransil GCM (which is a mixture of D5 and polysilicone 11). Fluoro surface agent

The pigments may be totally or partially surface-treated with a compound of fluoro nature.

The fluoro surface agents may be chosen from perfluoroalkyl phosphates, perfluoropolyethers, polytetrafluoropolyethylenes (PTFE), perfluoroalkanes, perfluoroalkyl silazanes, poly(hexafluoropropylene oxides), and polyorganosiloxanes comprising perfluoroalkyl or perfluoropolyether groups.

The term "perfluoroalkyl radicaF means an alkyl radical in which all of the hydrogen atoms have been replaced with fluorine atoms.

Perfluoropolyethers are especially described in patent application EP 0 486 135, and sold under the trade name Fomblin by the company Montefluos.

Perfluoroalkyl phosphates are described in particular in patent application JP H05-86984. The perfluoroalkyl diethanolamine phosphates sold by Asahi Glass under the reference AsahiGuard AG530 may be used.

Among the linear perfluoroalkanes that may be mentioned are perfluorocycloalkanes, perfluoro(alkylcycloalkanes), perfluoropolycycloalkanes, aromatic perfluoro hydrocarbons (perfluoroarenes) and hydrocarbon-based perfluoro organic compounds comprising at least one heteroatom.

Among the perfluoroalkanes, mention may be made of the linear alkane series such as perfluorooctane, perfluorononane or perfluorodecane.

Among the perfluorocycloalkanes and the perfluoro(alkylcycloalkanes), mention may be made of perfluorodecalin sold under the name Flutec PP5 GMP by the company Rhodia, perfluoro(methyldecalin) and perfluoro(C3-C5 alkylcyclohexanes) such as perfluoro(butylcyclohexane).

Among the perfluoropolycycloalkanes, mention may be made of bicyclo[3.3.1]nonane derivatives such as perfluorotrimethylbicyclo[3.3.1]nonane, adamantane derivatives such as perfluorodimethyladamantane, and hydrogenated perfluorophenanthrene derivatives such as tetracosafluorotetradecahydrophenanthrene. Among the perfluoroarenes, mention may be made of perfluoronaphthalene derivatives, for instance perfluoronaphthalene and perfluorom ethyl- 1 -naphthalene.

As examples of commercial references of pigments treated with a fluoro compound, mention may be made of:

- yellow iron oxide/perfluoroalkyl phosphate sold under the reference PF 5 Yellow 601 or PFX-5 Sunpuro Yellow C33-9001 by the company Daito Kasei;

- red iron oxide/perfluoroalkyl phosphate sold under the reference PF 5 Red R 516L or PFX-5 Sunpuro Red C33-8001 by the company Daito Kasei;

- black iron oxide/perfluoroalkyl phosphate sold under the reference PF 5 Black BL100 or PFX-5 Sunpuro Black C33-7001 by the company Daito Kasei;

- titanium dioxide/perfluoroalkyl phosphate sold under the reference PF 5 Ti0₂ CR 50 by the company Daito Kasei;

- yellow iron oxide/perfluoropolymethyl isopropyl ether sold under the reference Iron oxide yellow BF-25-3 by the company Toshiki;

- DC Red 7/perfluoropolymethyl isopropyl ether sold under the reference D&C Red 7 FHC by the company Cardre Inc.;

- DC Red 6/PTFE sold under the reference T 9506 by the company Warner- Jenkinson.

Fluorosilicone surface agent

The pigments may be totally or partially surface-treated with a compound of fluorosilicone nature.

The fluorosilicone compound may be chosen from perfluoroalkyl dimethicones, perfluoroalkyl silanes and perfluoroalkyl trialkoxysilanes.

In particular, mention may be made of perfluorooctyltriethoxysilane. Perfluoroalkyl silanes that may be mentioned include the products LP-IT and

LP-4T sold by Shin-Etsu Silicone.

The perfluoroalkyl dimethicones may be represented by the following formula:

in which: - R represents a linear or branched divalent alkyl group containing from 1 to 6 carbon atoms, preferably a divalent methyl, ethyl, propyl or butyl group;

- Rf represents a perfluoroalkyl radical containing 1 to 9 carbon atoms and preferably 1 to 4 carbon atoms;

- m is chosen between 0 and 150 and preferably between 20 and 100; and

- n is chosen between 1 and 300 and preferably between 1 and 100.

As examples of commercial references of pigments treated with a fluorosilicone compound, mention may be made of titanium dioxide/fluorosilicone sold under the reference Fluorosil Titanium dioxide 100TA by the company Advanced Dermaceuticals International Inc and pigments treated with perfluorooctyltriethoxysilane sold under the references FHS by the company Daito Kasei Kogyo.

Other lipophilic surface agents

The hydrophobic treatment agent may also be chosen from:

i) metal soaps such as aluminium dimyristate and the aluminium salt of hydrogenated tallow glutamate;

Metal soaps that may especially be mentioned include metal soaps of fatty acids containing from 12 to 22 carbon atoms and in particular those containing from 12 to 18 carbon atoms.

The metal of the metal soap may especially be zinc or magnesium.

Metal soaps that may be used include zinc laurate, magnesium stearate, magnesium myri state and zinc stearate, and mixtures thereof;

ii) fatty acids such as lauric acid, myristic acid, stearic acid and palmitic acid;

iii) N-acylamino acids or salts thereof, which may comprise an acyl group containing from 8 to 22 carbon atoms, for instance a 2-ethylhexanoyl, caproyl, lauroyl, myristoyl, palmitoyl, stearoyl or cocoyl group;

The amino acid may be, for example, lysine, glutamic acid or alanine.

The salts of these compounds may be the aluminium, magnesium, calcium, zirconium, zinc, sodium or potassium salts.

Thus, according to a particularly preferred embodiment, an N-acylamino acid derivative may especially be a derivative of glutamic acid and/or a salt thereof, and more particularly a stearoyl glutamate, for instance aluminium stearoyl glutamate. iv) lecithin and derivatives thereof;

As examples of lecithin treated pigments, mention may be made of those sold under the commercial references Unipure HLC by the company Sensient Company.

v) isopropyl triisostearyl titanate;

As examples of isopropyl titanium triisostearate (ITT)-treated pigments, mention may be made of those sold under the commercial references BWBO-12 (Iron oxide CI77499 and isopropyl titanium triisostearate), BWYO-12 (Iron oxide CI77492 and isopropyl titanium triisostearate) and BWRO-12 (Iron oxide CI77491 and isopropyl titanium triisostearate) by the company Kobo.

vi) isostearyl sebacate;

vii) natural plant or animal waxes or polar synthetic waxes;

viii) fatty esters, in particular jojoba esters;

ix) phospholipids; and

x) mixtures thereof.

The waxes mentioned in the abovementioned compounds may be those generally used in the cosmetics field, as defined hereinbelow.

They may especially be hydrocarbon-based, silicone and/or fluoro waxes, optionally comprising ester or hydroxyl functions. They may also be of natural or synthetic origin.

The term "polar wax" means a wax containing chemical compounds comprising at least one polar group. Polar groups are well known to those skilled in the art; they may be, for example, alcohol, ester or carboxylic acid groups. Polyethylene waxes, paraffin waxes, microcrystalline waxes, ozokerite and Fischer-Tropsch waxes do not feature among polar waxes.

In particular, polar waxes have a mean Hansen solubility parameter 5_a at 25°C such that 5_a > 0 (J/cm )i_/2 and better still 5_a > 1 (J/cm )i_/2:

in which δ_ρ and 5_h are, respectively, the polar contributions and interactions of types specific to the Hansen solubility parameters. The definition of solvents in the Hansen three-dimensional solubility space is described in the article by CM. Hansen: The three dimensional solubility parameters, J. Paint Technol. 39, 105 (1967):

- δ_ρ characterizes the Debye interaction forces between permanent dipoles and also the Keesom interaction forces between induced dipoles and permanent dipoles.

The parameters δ_ρ and 5_h are expressed in (J/cm )i_/2.

A polar wax consists especially of molecules comprising, besides carbon and hydrogen atoms in their chemical structure, heteroatoms (such as O, N and P).

As non-limiting illustrations of these polar waxes, mention may be made especially of natural polar waxes, such as beeswax, lanolin wax, orange wax, lemon wax, Chinese insect wax, rice bran wax, carnauba wax, candelilla wax, ouricury wax, cork fibre wax, sugarcane wax, Japan wax, sumach wax and montan wax.

According to one particular embodiment, the pigments may be coated with at least one compound chosen from silicone surface agents; fluoro surface agents; N- acylamino acids or salts thereof; isopropyl triisostearyl titanate; natural plant or animal waxes; fatty esters; and mixtures thereof.

According to a particularly preferred embodiment, the pigments may be coated with an N-acylamino acid and/or a salt thereof, in particular with a derivative of glutamic acid and/or a salt thereof, or with a fatty ester, in particular with a jojoba ester.

According to a more particularly preferred embodiment, the pigments may be coated with an N-acylamino acid and/or a salt thereof, in particular with a derivative of glutamic acid and/or a salt thereof, especially a stearoyl glutamate, for instance aluminium stearoyl glutamate.

As examples of coated pigments according to the invention, mention may be made more particularly of titanium dioxide and iron oxide coated with aluminium stearoyl glutamate, for example sold under the reference NAI by Miyoshi Kasei, pigments treated with perfluorooctyltriethoxysilane, for example sold under the references FHS by the company Daito Kasei Kogyo, lecithin treated pigments, for example sold under the commercial references Unipure HLC by the company Sensient Company and pigments treated with a fluoro compound, for example sold under the reference PF 5 or PFX-5 by the company Daito Kasei, and mixtures thereof.

In particular, mention may be made of a mixture of pigments (in particular iron oxides) treated with a fluoro compound, for example sold under the reference PF 5 or PFX- 5 by the company Daito Kasei and pigments (in particular titanium dioxide) treated with perfluorooctyltriethoxysilane, for example sold under the references FHS by the company Daito Kasei Kogyo.

Mention may be made more preferably of titanium dioxide and iron oxide coated with aluminium stearoyl glutamate, for example sold under the reference NAI by Miyoshi Kasei.

The pigments coated according to the invention with at least one hydrophobic compound are present in a composition of the invention in a proportion of at least 10% by weight, preferably at least 12% by weight and better still in a proportion of at least 15% by weight relative to the total weight of the composition.

NATURE OF THE COATED OR UNCOATED PIGMENTS

As stated previously, a composition may also contain pigments not coated with a lipophilic or hydrophobic compound.

These other pigments may be coated with a hydrophilic compound or uncoated.

These pigments may be mineral pigments especially as defined previously. These pigments may also be organic pigments.

The term "organic pigment" means any pigment that satisfies the definition in Ullmann's encyclopaedia in the chapter on organic pigments. The organic pigment may especially be chosen from nitroso, nitro, azo, xanthene, quinoline, anthraquinone, phthalocyanin, metal complex, isoindolinone, isoindoline, quinacridone, perinone, perylene, diketopyrrolopyrrole, thioindigo, dioxazine, triphenylmethane and quinophthalone compounds.

The organic pigment(s) may be chosen, for example, from carmine, carbon black, aniline black, melanin, azo yellow, quinacridone, phthalocyanin blue, sorghum red, the blue pigments codified in the Color Index under the references CI 42090, 69800, 69825, 73000, 74100 and 74160, the yellow pigments codified in the Color Index under the references CI 11680, 11710, 15985, 19140, 20040, 21100, 21108, 47000 and 47005, the green pigments codified in the Color Index under the references CI 61565, 61570 and 74260, the orange pigments codified in the Color Index under the references CI 11725, 15510, 45370 and 71105, the red pigments codified in the Color Index under the references CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 17200, 26100, 45380, 45410, 58000, 73360, 73915 and 75470, and the pigments obtained by oxidative polymerization of indole or phenolic derivatives as described in patent FR 2 679 771.

These pigments may also be in the form of composite pigments as described in patent EP 1 184 426. These composite pigments may especially be composed of particles comprising a mineral core at least partially covered with an organic pigment and at least one binder for attaching the organic pigments to the core.

The pigment may also be a lake. The term "lake" means insolubilized dyes adsorbed onto insoluble particles, the assembly thus obtained remaining insoluble during use.

The mineral substrates onto which the dyes are adsorbed are, for example, alumina, silica, calcium sodium borosilicate, calcium aluminium borosilicate and aluminium.

Mention may be made, among the organic dyes, of cochineal carmine. Mention may also be made of the products known under the following names: D&C Red 21 (CI 45 380), D&C Orange 5 (CI 45 370), D&C Red 27 (CI 45 410), D&C Orange 10 (CI 45 425), D&C Red 3 (CI 45 430), D&C Red 4 (CI 15 510), D&C Red 33 (CI 17 200), D&C Yellow 5 (CI 19 140), D&C Yellow 6 (CI 15 985), D&C Green (CI 61 570), D&C Yellow 1 O (CI 77 002), D&C Green 3 (CI 42 053), D&C Blue 1 (CI 42 090).

An example of a lake that may be mentioned is the product known under the name D&C Red 7 (CI 15 850: 1).

Nature of the hydrophilic coating

As stated previously, these other pigments may be coated with a hydrophilic compound.

The said hydrophilic compound for surface-treating a pigment in order to optimize its dispersion in the gelled aqueous phase is more particularly chosen from biological polymers, carbohydrates, polysaccharides, polyacrylates and polyethylene glycol derivatives.

Examples of biological polymers that may be mentioned include polymers based on monomers of carbohydrate type.

More particularly, mention may be made of bio saccharide gum, chitosans and derivatives thereof, such as butoxy chitosan, carboxymethyl chitosan, carboxybutyl chitosan, chitosan gluconate, chitosan adipate, chitosan glycolate, chitosan lactate, etc., chitins and derivatives thereof, such as carboxymethyl chitin, chitin glycolate; cellulose and derivatives thereof such as cellulose acetate; microcrystalline cellulose; distarch phosphate; sodium hyaluronate; soluble proteoglycans; galacto-arabinans; glycosaminoglycans; glycogen; sclerotium gum; dextran; starch and derivatives thereof; and mixtures thereof.

Examples of carbohydrates that may especially be mentioned include polyhydroxyaldehydes and polyhydroxy ketones of general formula:

C_x(H₂0)_y

in which x and y may range from 1 to 1 000 000.

The carbohydrates may be monosaccharides, disaccharides or polysaccharides.

Examples of carbohydrates that may especially be mentioned include amylodextrins, β-glucans, cyclodextrins, modified corn starch, glycogen, hyaluronic acid, hydroxypropylcylodextrin, lactose, maltitol, guanosine, glyceryl starch, starch from Triticum vulgare, trehalose, sucrose and derivatives thereof, raffinose and sodium chondroitin sulfate.

C1-C20 alkylene glycols or C1-C20 alkylene glycol ethers, alone or in combination with tri-Ci-C₂o-alkylsilanes, may also be used as surface treatment agents.

Examples that may be mentioned include pigments surface-treated with PEG alkyl ether alkoxysilane, for instance pigments treated with PEG-8-methyl ether triethoxysilane sold by the company Kobo under the name SW pigments.

Silicones such as dimethicones bearing hydrophilic groups, also known as dimethicone copolyols or alkyl dimethicone copolyols, may also be suitable for use in the invention as surface treatment agents. In particular, such dimethicones may comprise, as repeating units, C₁-C₂₀ alkylene oxides such as ethylene oxide or propylene oxide. An example that may be mentioned is the pigment treated with PEG-12- dimethicone, sold by the company Sensient Corporation under the name LCW AQ Pigment. According to an advantageous embodiment variant, the pigments coated with at least one hydrophilic compound and/or uncoated pigments are present totally or partly, and preferably only, in the gelled aqueous phase.

The amount of pigments coated with at least one hydrophilic compound and/or of uncoated pigments is especially conditioned by the intended use of the cosmetic composition under consideration, and the adjustment of this amount obviously falls within the competence of the composition formulator.

AQUEOUS PHASE

The aqueous phase of a composition according to the invention comprises water and optionally a water-soluble solvent.

In the present invention, the term "water-soluble solvent" denotes a compound that is liquid at room temperature and water-mi scible (miscibility with water of greater than 50% by weight at 25°C and atmospheric pressure).

The water-soluble solvents that may be used in the composition of the invention may also be volatile.

Among the water-soluble solvents that may be used in the composition in accordance with the invention, mention may be made especially of lower monoalcohols containing from 1 to 5 carbon atoms, such as ethanol and isopropanol, glycols containing from 2 to 8 carbon atoms, such as ethylene glycol, propylene glycol, 1,3-butylene glycol and dipropylene glycol, C₃ and C₄ ketones and C₂-C4 aldehydes.

The aqueous phase is present in the composition according to the invention in a proportion of at least 30% by weight, preferably at least 40% by weight, preferably at least 50%) by weight and better still from 50%> to 75% by weight relative to the total weight of the said composition.

According to another embodiment variant, the aqueous phase of a composition according to the invention may comprise at least one C₂-C₃₂ polyol. For the purposes of the present invention, the term "polyol" should be understood as meaning any organic molecule comprising at least two free hydroxyl groups.

Preferably, a polyol in accordance with the present invention is present in liquid form at room temperature.

A polyol that is suitable for use in the invention may be a compound of linear, branched or cyclic, saturated or unsaturated alkyl type, bearing on each alkyl chain at least two -OH functions, in particular at least three -OH functions and more particularly at least four -OH functions.

The polyols that are advantageously suitable for use in the formulation of a composition according to the present invention are those especially containing from 2 to 32 carbon atoms and preferably from 3 to 16 carbon atoms.

Advantageously, the polyol may be chosen, for example, from ethylene glycol, pentaerythritol, trimethylolpropane, propylene glycol, 1,3 -propanediol, butylene glycol, isoprene glycol, pentylene glycol, hexylene glycol, glycerol, polyglycerols such as glycerol oligomers, for instance diglycerol, and polyethylene glycols, and mixtures thereof.

According to a preferred embodiment of the invention, the said polyol is chosen from ethylene glycol, pentaerythritol, trimethylolpropane, propylene glycol, glycerol, polyglycerols and polyethylene glycols, and mixtures thereof.

According to a particular embodiment, the composition of the invention may comprise at least propylene glycol.

According to another particular embodiment, the composition of the invention may comprise at least glycerol.

OILY PHASE

For the purposes of the invention, an oily phase comprises at least one oil.

The term "oil" means any fatty substance that is in liquid form at room temperature and atmospheric pressure.

An oily phase that is suitable for preparing the cosmetic compositions according to the invention may comprise hydrocarbon-based oils, silicone oils, fluoro oils or non-fluoro oils, or mixtures thereof.

The oils may be volatile or non-volatile. They can be of animal, plant, mineral or synthetic origin. According to one embodiment variant, oils of plant origin are preferred.

For the purposes of the present invention, the term "non-volatile oil" means an oil with a vapour pressure of less than 0.13 Pa.

For the purposes of the present invention, the term "silicone oiF means an oil comprising at least one silicon atom, and especially at least one Si-0 group.

The term "fluoro oiF means an oil comprising at least one fluorine atom.

The term "hydrocarbon-based oiF means an oil mainly containing hydrogen and carbon atoms.

The oils may optionally comprise oxygen, nitrogen, sulfur and/or phosphorus atoms, for example in the form of hydroxyl or acid radicals.

For the purposes of the invention, the term "volatile oil" means any oil that is capable of evaporating on contact with the skin in less than one hour, at room temperature and atmospheric pressure. The volatile oil is a volatile cosmetic compound, which is liquid at room temperature, especially having a nonzero vapour pressure, at room temperature and atmospheric pressure, in particular having a vapour pressure ranging from 0.13 Pa to 40 000 Pa (10^"3 to 300 mmHg), in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg). a) Volatile oils

The volatile oils may be hydrocarbon-based oils or silicone oils.

Among the volatile hydrocarbon-based oils containing from 8 to 16 carbon atoms, mention may be made especially of branched C₈-Ci₆ alkanes, for instance C₈-Ci₆ isoalkanes (also known as isoparaffins), isododecane, isodecane, isohexadecane and, for example, the oils sold under the trade names Isopar or Permethyl, branched C₈-Ci₆ esters, for instance isohexyl neopentanoate, and mixtures thereof. Preferably, the volatile hydrocarbon-based oil is chosen from volatile hydrocarbon-based oils containing from 8 to 16 carbon atoms, and mixtures thereof, in particular from isododecane, isodecane and isohexadecane, and is especially isohexadecane.

Mention may also be made of volatile linear alkanes comprising from 8 to 16 carbon atoms, in particular from 10 to 15 carbon atoms and more particularly from 11 to 13 carbon atoms, for instance n-dodecane (C₁₂) and n-tetradecane (C₁₄) sold by Sasol under the respective references Parafol 12-97 and Parafol 14-97, and also mixtures thereof, the undecane-tridecane mixture, mixtures of n-undecane (Cn) and of n-tridecane (C₁₃) obtained in Examples 1 and 2 of patent application WO 2008/155 059 from the company Cognis, and mixtures thereof.

Volatile silicone oils that may be mentioned include linear volatile silicone oils such as hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, tetradecamethylhexasiloxane, hexadecamethylheptasiloxane and dodecamethylpentasiloxane.

Volatile cyclic silicone oils that may be mentioned include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane. b) Non-volatile oils

The non-volatile oils may be chosen especially from non-volatile hydrocarbon- based oils, fluoro oils and/or silicone oils.

Non-volatile hydrocarbon-based oils that may especially be mentioned include:

- hydrocarbon-based oils of animal origin,

- hydrocarbon-based oils of plant origin, synthetic ethers containing from 10 to 40 carbon atoms, such as dicapryl ether,

- synthetic esters, for instance the oils of formula R₁COOR₂, in which Ri represents a linear or branched fatty acid residue containing from 1 to 40 carbon atoms and R₂ represents a hydrocarbon-based chain, which is especially branched, containing from 1 to 40 carbon atoms, on condition that Ri + R₂ > 10. The esters may be chosen especially from fatty alcohol and fatty acid esters, for instance cetostearyl octanoate, isopropyl alcohol esters such as isopropyl myristate or isopropyl palmitate, ethyl palmitate, 2- ethylhexyl palmitate, isopropyl stearate, octyl stearate, hydroxylated esters, for instance isostearyl lactate or octyl hydroxystearate, alkyl or polyalkyl ricinoleates, hexyl laurate, neopentanoic acid esters, for instance isodecyl neopentanoate or isotridecyl neopentanoate, and isononanoic acid esters, for instance isononyl isononanoate or isotridecyl isononanoate,

- polyol esters and pentaerythritol esters, for instance dipentaerythrityl tetrahydroxy stearate/tetrai sostearate, - fatty alcohols that are liquid at room temperature, with a branched and/or unsaturated carbon-based chain containing from 12 to 26 carbon atoms, for instance 2- octyldodecanol, isostearyl alcohol and oleyl alcohol,

- C12-C22 higher fatty acids, such as oleic acid, linoleic acid, linolenic acid, and mixtures thereof,

- non-phenyl silicone oils, for instance caprylyl methicone, and

- phenyl silicone oils, for instance phenyl trimethicones, phenyl dimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenyl dimethicones, diphenylmethyldiphenyltrisiloxanes and 2-phenylethyl trimethylsiloxysilicates, dimethicones or phenyl trimethicone with a viscosity of less than or equal to 100 cSt, and trimethyl pentaphenyl trisiloxane, and mixtures thereof; and also mixtures of these various oils.

A composition according to the invention may comprise from 1% to 85% by weight, better still from 3%> to 50% by weight and preferably from 10%> to 35% by weight of oil(s) relative to the total weight of the gelled oily phase.

A composition according to the invention may comprise from 10% to 50% by weight, better still from 15% to 35% by weight and preferably from 20% to 30% by weight of oil(s) relative to the total weight of the composition. Preferably, a composition according to the invention comprises volatile and/or non volatile silicone oils. Such silicone oils are particularly appreciated when the oily gelling agent is an organopolysiloxane polymer.

The weight percentage of oils is assessed taking into account the weight of the oils present, where appropriate, as vehicles for certain compounds forming a composition according to the invention.

As mentioned above, the gelled oily phase according to the invention may have a threshold stress of greater than 1.5 Pa and preferably greater than 10 Pa. This threshold stress value reflects a gel-type texture of this oily phase. FILLERS

Advantageously, a composition according to the invention may also comprise one or more fillers. For the purposes of the present invention, the term "fillers" should be understood as meaning colourless or white solid particles of any form, which are in an insoluble and dispersed form in the medium of the composition.

These fillers, of mineral or organic, natural or synthetic nature, give the composition containing them softness and give the makeup result a matt effect and uniformity.

Preferably, a composition of the invention comprises fillers, particularly when it is dedicated to provide a high coverage.

In particular, a composition according to the invention may comprise from 2% to 35% by weight, especially from 5% to 35% by weight, in particular from 5% to 20% by weight of fillers relative to the total weight of the said composition.

DISPERSANT

Advantageously, a composition according to the invention may also comprise a dispersant.

Such a dispersant may be a surfactant, an oligomer, a polymer or a mixture of several thereof.

According to one particular embodiment, a dispersant in accordance with the invention is a surfactant.

ACTIVE AGENT

A composition according to the invention may comprise at least one active agent, in particular a moisturizer (also known as a humectant).

Preferably, such moisturizer is glycerol.

The moisturizer(s) may be present in the composition in a content ranging from 0.1%) to 15%) by weight, especially from 0.5% to 10%> by weight or even from 1%> to 6%> by weight, relative to the total weight of the said composition.

As other active agents that may be used in the composition of the invention, examples that may be mentioned include vitamins and sunscreens, and mixtures thereof.

Preferably, a composition of the invention comprises at least one active agent. It is a matter of routine for those skilled in the art to adjust the nature and amount of the additives present in the compositions in accordance with the invention such that the desired cosmetic properties thereof are not thereby affected.

According to a preferred embodiment, a composition of the invention may advantageously be in the form of a foundation.

According to another embodiment, a composition of the invention may advantageously be in the form of a composition for making up the skin and especially the face. It may thus be an eyeshadow or a face powder.

According to another embodiment, a composition of the invention may advantageously be in the form of a lip product, in particular a lipstick.

Such compositions are especially prepared according to the general knowledge of a person skilled in the art.

Throughout the description, including the claims, the term "comprising a" should be understood as being synonymous with "comprising at least one", unless otherwise specified.

The terms "between ... and ... " and "ranging from ... to ... " should be understood as meaning limits included, unless otherwise specified.

The invention is illustrated in greater detail by the examples and figures presented below. Unless otherwise mentioned, the amounts indicated are expressed as weight percentages.

METHODOLOGY FOR THE OSCILLATING DYNAMIC RHEOLOGY MEASUREMENTS

These are rheological measurements in the harmonic regime, which measure the elastic modulus.

The measurements are taken using a Haake RS600 rheometer on a product at rest, at 25°C with a plate-plate rotor 0 60 mm and a 2 mm gap.

The measurements in the harmonic regime make it possible to characterize the viscoelastic properties of the products. The technique consists in subjecting a material to a stress that varies sinusoidally over time and in measuring the response of the material to this stress. In a region in which the behaviour is linearly viscoelastic (zone in which the strain is proportional to the stress), the stress (τ) and the strain (γ) are two sinusoidal functions of time that are written in the following manner:

x(t) = To sin (cot)

γ(ΐ) = γο sin (cot + δ)

in which:

To represents the maximum amplitude of the stress (Pa);

γο represents the maximum amplitude of the strain (-);

co = 2ΠΝ represents the angular frequency (rad.s^"1) with N representing the frequency (Hz); and

δ represents the phase angle of the stress relative to the strain (rad).

Thus, the two functions have the same angular frequency, but they are dephased by an angle δ. According to the phase angle δ between τ(ΐ) and γ(ΐ), the behaviour of the system may be assessed:

- if δ = 0, the material is purely elastic;

- if δ = Π/2, the material is purely viscous (Newtonian fluid); and

- if 0 < δ < Π/2, the material is viscoelastic.

In general, the stress and the strain are written in complex form:

τ*(ΐ) = τ₀ e^itot

γ*(ΐ) = γο e^{(ltot + 5)}

A complex stiffness modulus, representing the overall resistance of the material to the strain, whether it is of elastic or viscous origin, is then defined by:

G* = τ*/ γ* = G' + iG"

in which:

G' is the storage modulus or elastic modulus, which characterizes the energy stored and totally restituted in the course of a cycle, G' = (τ₀/ γο) cos δ; and

G" is the loss modulus or viscous modulus, which characterizes the energy dissipated by internal friction in the course of a cycle, G' ' = (τ₀/ γ₀) sin δ.

The parameter retained is the mean stiffness modulus G* recorded at the plateau measured at a frequency of 1 Hz. EXAMPLE

Example 1: Foundation formulation according to the invention

A foundation formulation in accordance with the invention is prepared from the phases described below.

1) Preparation of the aqueous phase

The components of the aqueous phase are weighed out in a beaker and stirred with a Rayneri blender at room temperature.

The aqueous gelling agent is added with stirring at room temperature. The stirring is adjusted so as not to incorporate air into the mixture.

The mixture is stirred moderately for about 10 minutes at room temperature.

2) Preparation of the oily phase

The pigments are ground with 15% of the silicone oil using a three-roll mill.

The ground material and the remainder of the oil are placed in a beaker and stirred with a Rayneri blender at room temperature.

The gel of silicone elastomer in dimethicone is added with moderate stirring at room temperature.

The gel slowly thickens. The mixture is stirred for 20 minutes.

3) Preparation of the foundation formulation

The formulation is obtained by mixing the phases intended to form the foundation in accordance with the invention. The aqueous and oily gels are weighed out and then mixed with a Rayneri blender.

The formulation is prepared using the weight proportions described below. Formula

(weight %

Phase Compounds relative to the total weight of the

composition)

Water qs 100

Glycerol 5

Aqueous Preserving agent 0.8

phase

Hydroxy ethyl aery late/sodium

acryloyldimethyltaurate copolymer (Sepinov® EMT 2.40

10 sold by the company SEPPIC)

Dimethicone 5 cSt 12.00

Oily Dimethicone 84.5%/dimethicone crosspolymer

phase 15.5% 10.00

(DC9041^® sold by the company Dow Corning) (1.55*)

(*% of dimethicone crosspolymer solids)

Iron oxides coated with aluminium stearoyl

glutamate (NAI-C33-9001-10 sold by the company 2.40

Miyoshi Kasei)

Pigments

Titanium dioxide coated with aluminium stearoyl

glutamate (NAI-TAO-77891 sold by the company 15.60

Miyoshi Kasei)

The formulation has a gel-gel texture which is dense and finely dispersed. The formulation is smooth and homogeneous and has very good cosmetic qualities, such as very good coverage. In addition, the texture is fresh and light on the skin on application.

Example 2: Foundation formulation according to the invention

1) Preparation of the aqueous phase

The mixture is stirred moderately for about 10 minutes at room temperature.

2) Preparation of the oily phase

The pigments are ground with 15% of the polydimethysiloxane using a three- roll mill. The ground material and the remainder of the oil are placed in a beaker and stirred with a Rayneri blender at room temperature.

The mixture of poly dimethyl siloxane crosslinked with hexadiene/ polydimethylsiloxane is added with moderate stirring at room temperature.

The gel slowly thickens. The mixture is stirred for 20 minutes.

3) Preparation of the foundation formulation

The formulation is prepared using the weight proportions described below.

The formulation has a gel-gel texture which is fresh and light on the skin on application. The formulation has very good cosmetic qualities, such as very good coverage. Example 3: Foundation formulation according to the invention

1) Preparation of the aqueous phase

The mixture is stirred moderately for about 10 minutes at room temperature.

2) Preparation of the oily phase

The pigments are ground with 15% of the silicone oil using a three-roll mill.

The gel slowly thickens. The mixture is stirred for 20 minutes.

3) Preparation of the foundation formulation

The formulation is prepared using the weight proportions described below.

Formula

(weight %

Phase Compounds relative to the total weight of the

composition)

Water qs 100

Glycerol 5

Aqueous Preserving agent 0.8

phase

Hydroxy ethyl aery late/sodium

acryloyldimethyltaurate copolymer (Sepinov® EMT 1.20

10 sold by the company SEPPIC)

Dimethicone 5 cSt 12.00

Oily Dimethicone 84.5%/dimethicone crosspolymer

phase 15.5% 10.00

(DC9041^® sold by the company Dow Corning) (1.55*)

(*% of dimethicone crosspolymer solids)

Iron oxides coated with hydrogenated lecithin

2.40

(Unipure HLC sold by the company Sensient)

Pigments

Titanium dioxide coated with hydrogenated lecithin

15.60

(Unipure HLC sold by the company Sensient)

The formulation has a gel-gel texture which is smooth and homogeneous. The formulation is thick and consistent and has very good cosmetic qualities, such as very good coverage. In addition, the texture is fresh and light on the skin on application.

Example 4: Foundation formulation according to the invention

1) Preparation of the aqueous phase

The mixture is stirred moderately for about 10 minutes at room temperature.

2) Preparation of the oily phase

The pigments are ground with 15% of the silicone oil using a three-roll mill. The ground material and the remainder of the oil are placed in a beaker and stirred with a Rayneri blender at room temperature. The gel of silicone elastomer in dimethicone is added with moderate stirring temperature.

The gel slowly thickens. The mixture is stirred for 20 minutes. 3) Preparation of the foundation formulation

The formulation is prepared using the weight proportions described below.

The formulation has a gel-gel texture which is dense. The formulation is homogeneous and has very good coverage qualities. In addition, the texture is fresh and light on the skin on application.

Example 5: Comparative example with non-coated pigments

A comparative formulation is prepared from the phases described below. 1) Preparation of the aqueous phase

The mixture is stirred moderately for about 10 minutes at room temperature.

2) Preparation of the oily phase

The pigments are ground with 15% of the silicone oil using a three-roll mill.

The gel slowly thickens. The mixture is stirred for 20 minutes.

3) Preparation of the comparative formulation

The phases are mixed in order to form the foundation in accordance with the invention. The aqueous and oily gels are weighed out and then mixed with a Rayneri blender.

However, the formulation cannot be obtained. Indeed, the aqueous and oily phases do not mix.

The following weight proportions are used to prepare the phases.

Formula

(weight %

Phase Compounds relative to the

total weight of the

composition)

Water qs 100

Glycerol 5.28

Aqueous Preserving agent 0.78

phase

Hydroxyethyl aery late/sodium

acryloyldimethyltaurate copolymer (Sepinov® EMT 1.20

10 sold by the company SEPPIC)

Dimethicone 5 cSt 12.00

Oily Dimethicone 84.5%/dimethicone crosspolymer

phase 15.5% 10.00

(DC9041^® sold by the company Dow Corning) (1.55*)

(*% of dimethicone crosspolymer solids)

Non-coated Titanium dioxide (Hombitan FF Pharma

15.60

sold by the company Sachtleben)

Pigments

Non-coated Iron oxides (Sunpuro sold by the

2.40

company SUN)

The quantity of non-coated pigments is too high with such oily phase quantity. Therefore, it is not possible to prepare the formulation with the non-coated pigments.

Indeed, the wettability of non-coated pigments is too bad.

Claims

1. Cosmetic composition for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising:

- at least one aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent, the said aqueous phase being present in a proportion of at least 30% by weight relative to the total weight of the composition; and

- at least one oily phase gelled with at least one lipophilic gelling agent;

the said phases forming therein a macroscopically homogeneous mixture;

2. Composition according to the preceding claim, in which the said gelled aqueous phase is present in a proportion of at least 40% by weight and preferably of at least 50%) by weight, relative to the total weight of the composition.

3. Composition according to either of the preceding claims, comprising as synthetic polymeric hydrophilic gelling agent at least one gelling agent chosen from crosslinked and/or neutralized 2-acrylamido-2-methylpropanesulfonic acid polymers and copolymers.

4. Composition according to any one of the preceding claims, comprising as synthetic polymeric hydrophilic gelling agent at least one copolymer of 2-acrylamido-2- methylpropanesulfonic acid and of hydroxy ethyl acrylate.

5. Composition according to any one of the preceding claims, comprising at least 12%) by weight and preferably at least 15%> by weight of pigments coated with at least one hydrophobic compound, relative to the total weight of the composition.

6. Composition according to any one of the preceding claims, in which the said pigments coated with at least one hydrophobic compound are present totally or partly, and preferably only, in the gelled oily phase.

7. Composition according to any one of the preceding claims, in which the pigments are coated with an N-acylamino acid and/or a salt thereof, in particular with a derivative of glutamic acid and/or a salt thereof, especially a stearoyl glutamate, and in particular aluminium stearoyl glutamate.

8. Composition according to any one of the preceding claims, in which the said lipophilic gelling agent is chosen from particulate gelling agents, organopolysiloxane elastomers, semi-crystalline polymers, dextrin esters and hydrogen bonding polymers, and mixtures thereof.

9. Composition according to any one of the preceding claims, comprising as lipophilic gelling agent at least one organopolysiloxane elastomer preferably chosen from dimethicone crosspolymer, vinyl dimethicone crosspolymer, dimethicone/vinyl dimethicone crosspolymer and dimethicone crosspolymer-3.

10. Composition according to any one of the preceding claims, containing, as hydrophilic gelling agent/lipophilic gelling agent system, a 2-acrylamido-2- methylpropanesulfonic acid and hydroxyethyl aciylate copolymer/organopolysiloxane elastomer system.

11. Composition according to any one of the preceding claims, containing the aqueous and oily phases in an aqueous phase/oily phase weight ratio of from 30/70 to 70/30, preferably from 40/60 to 60/40 and better still from 50/50 to 60/40.

12. Composition according to any one of the preceding claims, also containing at least uncoated pigments and/or pigments coated with at least one hydrophilic compound.

13. Composition according to any one of the preceding claims, which is in the form of a foundation.

14. Composition according to any one of the preceding claims, further comprising fillers.

15. Composition according to the preceding claim, comprising from 2% to 35% by weight, especially from 5% to 35% by weight, in particular from 5% to 20% by weight of fillers relative to the total weight of the said composition.

16. Composition according to any one of the preceding claims, further comprising volatile and/or non volatile silicone oils.

17. Composition according to any one of the preceding claims, further comprising a moisturizer, and preferably glycerol.

18. Process for preparing a cosmetic composition for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising at least one step of mixing:

- an aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent as defined in Claims 1, 3 and 4, the said aqueous phase being present in a proportion of at least 30% by weight relative to the total weight of the composition; and

- at least one oily phase gelled with at least one lipophilic gelling agent;

under conditions suitable for obtaining a macroscopically homogeneous mixture;

19. Process according to the preceding claim, in which the pigments coated with at least one hydrophobic compound are present totally or partly, and preferably only, in the gelled oily phase.

20. Process according to either of Claims 18 and 19, comprising a step of mixing at least three or even more gelled phases.

21. Process according to any one of Claims 18 to 20, in which the mixing is performed at room temperature.

22. Cosmetic process for making up and/or caring for keratin materials, in particular the skin and/or the lips, comprising at least one step which consists in applying to the said keratin material a composition as defined according to any one of Claims 1 to 17.

23. Cosmetic process for making up and/or caring for a keratin material, in particular the skin and/or the lips, comprising at least the application to the said material of a composition, in particular a macroscopically homogeneous composition, obtained by extemporaneous mixing, before application or at the time of application to the said keratin material, of at least one aqueous phase gelled with at least one synthetic polymeric hydrophilic gelling agent as defined in Claims 1, 3 and 4, and of at least one oily phase gelled with at least one lipophilic gelling agent; the said aqueous phase representing at least 30%) by weight, relative to the total weight of the composition; and the said composition comprising at least 10% by weight of pigments coated with at least one hydrophobic compound, relative to the total weight of the composition.