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Publication numberUS3686701 A
Publication typeGrant
Publication date29 Aug 1972
Filing date4 Feb 1970
Priority date4 Feb 1969
Also published asCA945902A1, DE2004877A1, US3729569
Publication numberUS 3686701 A, US 3686701A, US-A-3686701, US3686701 A, US3686701A
InventorsRoger Charle, Gregoire Kalopissis, Charles Zviak
Original AssigneeOreal
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cosmetic composition containing microencapsulated solvents for nail enamel
US 3686701 A
A cosmetic composition for removing nail enamel comprises a shaped cosmetic applicator containing a multiplicity of rupturable microcapsules, a portion of which contain a first solvent for the enamel and the remainder containing a second solvent exhibiting a solvent action on the enamel greater than said first solvent and a perfume to mask the odor of said solvents.
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Description  (OCR text may contain errors)

United States Patent Charle et al.

[ 1 Aug. 29, 1972 22 Filed: Feb. 4, 1970 21 Appl.No.: 8,720

[30] Foreign Application Priority Data Feb. 4, 1969 Luxembourg ..57,904

511 1111. C1. ..A61k 7/04 [58] FieldoiSearch ..424/14,16,31,38,61; 252/316, 364; 15110493; 401/132; 132/88.7

[56] References Cited UNITED STATES PATENTS 3,124,825 3/1964 Iovenko l5/l04.93

3,196,478 7/1965 Baymiller ..401/132 2,980,941 4/1961 Miller ..15/104.93 3,334,374 8/1967 Watkins ..401/196 3,334,790 8/1967 Eaton ..222/107 3,441,353 4/1969 Clapp ..401/132 3,472,675 10/1969 Gordon et al ..1 17/369 3,516,846 6/1970 Matson ..1 17/362 3,464,413 9/1969 Goldfarb et al 128/268 3,150,048 9/1964 1161106 et a1. ..424/61 2,765,257 10/1956 Blackburn ..424/61 Primary Examiner-Shep K. Rose Att0mey-Cushman, Darby & Cushman ABSTRACT A cosmetic composition for removing nail enamel comprises a shaped cosmetic applicator containing a multiplicity of rupturable microcapsules, a portion of which contain a first solvent for the enamel and the remainder containing a second solvent exhibiting a solvent action on the enamel greater than said first solvent and a perfume to mask the odor of said solvents.

2 Claims, No Drawings COSMETIC COMPOSITION CONTAINING MICROENCAPSULATED SOLVENTS FOR NAIL ENAMEL The present invention relates to a solvent cosmetic composition for nail enamel, characterized in that the solvent activity of the solvent cannot be brought into effect until mechanical pressure has been exerted on the composition at the moment of its application.

Solvents or solvent compositions for nail polish are well known. However, these solvent compositions have numerous disadvantages in use because they are generally liquid and have an unpleasant odor. Additionally, these compositions are stored in bottles and because of their solvent property, the obtaining of a complete seal which is necessary for such bottles presents obvious difficulties that are further increased by the fact that an applicator brush must generally be provided. It should also be noted that the use of these solvents is most often effected with a great excess of the product because of the difficulty of application with a brush, the excess being bothersome because of the disagreeable odor of the utilized compounds. Moreover, the use of an excess of solvent brings the solvent into contact with the skin around the nails, on which it has a drying effect. Finally, the solvent mixture evaporates rather rapidly from the bottles which are difficult for the user to close tightly.

The present invention is intended to obviate the above mentioned disadvantages, particularly those resulting from storage, the disagreeable odor of the solvent, its use in excessive quantities that are difficult to control, and its gradual evaporation from the container.

The present invention relates to a new solvent composition for nail enamel, containing all the usual active elements of a nail enamel solvent, but whose solvent action cannot occur until sufficient mechanical pressure has been exerted at the moment of application of the said composition.

The present invention likewise relates to the process of releasing the solvent agent at the moment of its application.

The invention also refers to certain forms of storage for the said cosmetic solvent composition that are especially advantageous.

The invention is also concerned with the preparation of the above mentioned cosmetic compositions.

According to the invention, it has been found possible to prepare solvent cosmetic compositions without the above indicated drawbacks, in that the solvent agents contained in the vehicle of these compositions can be physically separated from the rest of the components by the well-know technique of microencapsulation which consists in surrounding the solvent agents, divided into small liquid particles, by a suitable envelope.

The process of microencapsulation itself is not part of the present invention since the microencapsulation of the solvents is effected separately and the microcapsules are then introduced into a suitable cosmetic vehicle. Of course, all the other ingredients of the above mentioned cosmetic preparations can also be microencapsulated, including perfumes which mask the disagreeable odor of the solvent. Such perfumes may be 1 contained in separate microcapsules or in the microcapsules that contain the solvents.

According to the invention, the new solvent cosmetic compositions are constituted by .a vehicle which may be in one of a variety of forms such as a liquid, a thickened liquid, a cream, an emulsion, a powder or a pencil, containing all the conventional ingredients of the said solvent compositions as well as possible thickeners, provided, however, that solvent particles distributed in these compositions have the characteristic that they are surrounded by an envelope that cannot be destroyed by contact with the vehicle of the solvent composition. These envelopes can, however, be torn by a sufficient mechanical pressure in spreading.

The microcapsules, here designated by C, incorporated in the cosmetic composition contain substantially solvent agents such as ethyl acetate, isopropyl acetate, butyl acetate, amyl acetate, butyl propionate, ethyl lactate, butyl stearate, associated or not with oils or with high boiling point compounds e.g., ethylene glycol monoethylether, diethylene glycol monoethylether, 'y-valerolactone, castor oil, olive oil, etc.

The said microcapsules are prepared by conventional processes, but according to the invention they are characterized by the nature of their envelope, their dimensions and their thickness or by the ratio R between the weight of the envelope and the total weight of the microcapsule.

The compounds which form the said envelopes, here designed by E, can particularly be any one of the following:

polystyrene/maleic acid polyethylene and polyethylene/ethyl cellulose mixtures polyurethanes polyesters gelatin natural waxes such as carnauba wax, beeswax, candelilla wax, Japan wax paraffin wax polyamide formaldehyde urea acetal homopolymers and copolymers casein epoxy resins polypropylene cellulose acetophthalate Microcapsules are used whose dimensions vary from 10 to 600 microns, although by preference microcapsules of 20 to 250 microns are used. The thickness of the envelopes is also variable according to their mechanical strength, the ratio R usually being from 1 to 10 percent and preferably 3 to 6 percent by weight. However, the resistance of the microcapsules to mechanical pressure must always be sufficient so that, depending upon the kind of storage, the microcapsules will not be torn before they have been spread on the nail from which the film of enamel is to be removed.

According to a modification of the present invention, two solvents or solvent compositions are used which have a different solvent strength, contained respectively in microcapsules C, surrounded by envelopes E and C surrounded by envelopes E The capsules here designated C contain a first solvent agent which has a moderate solvent action and capsules C contain a second solvent whose solvent properties are definitely stronger, the said second solvent agent having a delayed action with reference to that of the first. The delayed action mechanism is obtained for example by the fact that for envelopes E E of the same kind and capsules of the same dimensions, envelopes E are thicker than envelopes E However, other mechanisms may also be employed, e.g., incorporation in capsules C of an agent that is inert with reference to envelopes E but which destroy envelopes E Microcapsules C may additionally contain a perfume whose release indicates that they have been opened.

The preparation of the cosmetic compositions of the invention is effected as follows:

In a first stage, a microencapsulation of the solvents or solvent compositions is effected according to any known microencapsulation process, care being taken however to select the type of membrane from the compounds mentioned above.

In a second stage, the cosmetic compositions themselves are prepared from conventional ingredients with capsules prepared in the first stage. Operation must always be such as to avoid rupture of the microcapsules. In a general way, the microcapsules can be introduced into the cosmetic vehicle at any moment of its preparation. However, a preferred method of the present invention resides in preparation first of one or more premixtures being determined in appropriate fashion depending upon the nature of the composition and of the microcapsules to be introduced.

To attain a good homogeneity and a good distribution of the microcapsules in the cosmetic composition of the invention, the vehicle density of the composition is preferably adjusted to the density of the microcapsules that are utilized by introduction of an excess of one of the ingredients or of a suitable substance. However, it is possible to operate in reverse, adjusting the density of the microcapsules which contain the solvent agents to the density of the vehicle of the composition. It is also possible to select the microcapsules and choose those whose density is appropriate, since this density varies as a function of the degree of filling of the said microcapsules and of ratio R defined above.

The solvents and solvent compositions of the invention may be in the form of a cream, an emulsion, a powder, a pencil and also of a flexible support of some kind such as a paper napkin or blotter type, fabric or a porous synthetic material, containing microcapsules.

In any case, presentation as a pencil is especially advantageous. In this case, the pencil channel ends in a small spatula with a triangular tip whose plane is perpendicular or inclined with reference to the axis of the above mentioned channel, said spatula serving to spread the cosmetic composition on the nail from which the coating of nail polish that covers it is to be removed, the pencil then being stoppered by a small movable cap after use. No matter what its form of packaging, the solvent composition of the invention is thus utilized exactly in the desired amounts, it does not present the disagreeable odor of the old compositions because of the microencapsulation, or else this odor is very much attenuated. Moreover, the presence of a perfume either in the vehicle of the cosmetic composition or in the capsules containing the solvent agent, makes it possible in all cases if desired to obtain an agreeable perfumed product.

According to a modification, microcapsules can be used which are coated inside by thin envelopes here designated E. The said thin envelopes are inert with respect to the agent or to the solvent mixture and/or coated on the outside by thin envelopes here designated E", which envelopes are inert with respect to the vehicle of the solvent cosmetic composition. These envelopes associated with the above mentioned envelopes of the microcapsules make it possible to make use in the preparation thereof of compounds which may not have the desired mechanical properties or other properties necessarily, which permits more ready production of the microcapsules of the invention. Envelopes E and E" are prepared moreover with polymers and colloids that have already been mentioned.

The following non-limiting examples in which the parts and percentages refer to weight, are again by way of illustration so as to permit a better understanding of the present invention.

EXAMPLE 1 Liquid solvent A cosmetic composition is prepared which is constituted by a dispersion of microcapsules in an aqueous phase, optionally in the presence of thickeners, to obtain dropwise application. The composition comprises an aqueous phase:

carboxymethyl cellulose 2.5 water 97.5

The capsules contain the solvent agent and a perfume, in the form of the following mixture:

acetone 84.8 ethylene glycol monoethylether l0 butyl stearate 5 perfume 0.2

The capsule envelope is constituted by a natural wax, an acrylic resin or casein.

The capsule dimension is from 50 to 250 microns. The composition is prepared by dispersing the capsules in the aqueous phase.

To use the composition, a drop is allowed to fall on the nail from which the polish is to be removed and rubbed with a small wad of hydrophilic cotton or a cloth to crush the capsules, releasing their solvent mixture.

EXAMPLE 2 Solvent paste A solvent cosmetic composition constituted as a paste and containing two kinds of solvent capsules C and C is prepared. Aqueous phase:

The aqueous phase is constituted by:

ethyl cellulose 3 stearic acid 10 20% ammonia solution 4 water in sufficient quantity to obtain a paste of the desired consistency. Capsules:

Capsules C, contain the following solvent mixture:

7 valeroacetone 50 ethylene glycol monoethylether 15 ethanol 35 The envelope of the capsules C, is constituted by natural wax, their dimension being from 150 to 250 microns.

Capsules C contain the following solvent mixture:

ethyl acetate 50 acetone 49.8 perfume 0.2

The envelope of the capsules C, is constituted by a styrene polymer/maleic acid, completely hydrolyzed, the dimension being from 50 to 100 microns.

Capsules C and C are incorporated in equal quantities in the previously prepared paste and the whole is then stored in a jar or in a flexible tube with a spatula applicator.

Release of the solvents is effected as indicated in the preceding description.

EXAMPLE 3 A solvent cosmetic composition is prepared in the form of a shaped cosmetic applicator, i.e., a pencil constituted in the following way:

A cosmetic vehicle is used which contains:

beeswax l ozocerite 24 carnauba wax 8 parafi'in 8 lanolin 10 All the above constituents are melted to prepare the pencil core whose hardness may be modified by appropriate addition of paraffin oil.

The capsules contain the solvent agent in the form of the following mixture:

ethyl acetate 40 acetone 30 amyl acetate ethylene glycol monoethylether l0 castor oil 14.8 perfume 0.2

EXAMPLE 4 Textile or paper for solvent microcapsules Microcapsules containing the following mixture as solvent agent are prepared:

ethyl acetate 60 diethylene glycol monoethylether 34.8 castor oil 5 perfume 0.2

The compounds forming the envelopes of the microcapsules are of natural wax, an acrylic resin, casein, hardened gelatin, or polyethylene/ethylcellulose. Dimension of the capsules is between 50 and 250 microns.

The said microcapsules are projected onto a fabric or paper support preliminarily treated in conventional fashion to allow adherence, thus providing another example of a shaped cosmetic applicator. Fabrics or papers are thus obtained that are solvents for the lacquer on the nails. It is then sufficient to rub the support thus prepared locally on the nail to burst the capsules adhering to the said support and thus to release the solvent contained therein.

The scope of the invention is defined in the following claims:

What is claimed is:

1. A cosmetic composition for removing nail enamel comprising a shaped cosmetic applicator support adapted to be applied locally to the nail and containing a multiplicity of rupturable microcapsules, a portion of said microcapsules encapsulating a first solvent for said enamel, which otherwise has a disagreeable odor, evaporates excessively on storage and exhibits a moderate solvent action on said enamel, the remainder of said microcapsules encapsulating (l) a second solvent for said enamel which otherwise has a disagreeable odor, evaporates excessively on storage and exhibits a solvent action on said enamel greater than said first solvent and (2) a perfume effective to mask the otherwise disagreeable odor of said solvents, said portion of microcapsules containing said first solvent being readily ruptured by mechanical pressure so that the solvent action of said first solvent cannot occur until sufficient mechanical pressure has been exerted at the moment of application of said composition, said remainder of microcapsules containing said second solvent and perfume being ruptured by mechanical pressure greater than that necessary to rupture said portion of microcapsules containing said first solvent so that the solvent action of said second solvent and the masking action of said perfume occurs after release of said first solvent whereby release of said perfume indicates that said remainder of said microcapsules has been ruptured, the density of said microcapsules being substantially equal to the density of said applicator to provide uniform distribution of said microcapsules in said composition, said walls of said microcapsules being inert to said solvents and said perfume and being formed of a material selected from the group consisting of polystyrene/maleic acid, polyethylene, polyethylene/ethyl cellulose mixture, polyurethane, polyester, gelatin, natural wax, paraffin wax, polyamide, urea formaldehyde, acetal homopolymers and copolymers, casein, epoxy resin, polypropylene and cellulose acetophthalate.

2. The cosmetic composition of claim 1 wherein said shaped cosmetic applicator is a textile fabric or paper support, said microcapsules being adhered thereto.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2765257 *8 Jul 19542 Oct 1956Blackburn James MNail polish remover and cuticle softener
US2980941 *8 Dec 195825 Apr 1961Ncr CoCleaning sheet
US3124825 *8 May 196217 Mar 1964 Iovenko
US3150048 *9 Mar 195922 Sep 1964Ciba LtdNail lacquer removing preparations
US3196478 *2 May 196327 Jul 1965Armstrong Cork CoApplier
US3334374 *28 Dec 19648 Aug 1967Minnesota Mining & MfgApplicator pad
US3334790 *17 May 19668 Aug 1967Armstrong Cork CoPackage for dispensing liquids
US3441353 *31 Jan 196729 Apr 1969Claff Clarence LPerfume dispenser
US3464413 *26 May 19672 Sep 1969United Merchants & MfgMedical bandages
US3472675 *23 Dec 196614 Oct 1969Ncr CoPressure-sensitive capsule-containing foraminated sheet material
US3516846 *18 Nov 196923 Jun 1970Minnesota Mining & MfgMicrocapsule-containing paper
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3729569 *21 Jun 197224 Apr 1973OrealCosmetic composition containing microencapsulated solvents for nail enamel
US3784391 *27 Dec 19718 Jan 1974Nl Industries IncFinely divided hollow microcapsules of polymeric resins
US3971852 *12 Jun 197327 Jul 1976Polak's Frutal Works, Inc.Process of encapsulating an oil and product produced thereby
US4151108 *15 Jun 197724 Apr 1979Radiometer A/SAqueous phase containing buffer and either polymeric oxygen-permeable microcapsules holding organic liquid or porous silicone rubber particles
US4217344 *29 Dec 197712 Aug 1980L'orealCompositions containing aqueous dispersions of lipid spheres
US4333845 *8 Sep 19808 Jun 1982Grow Group, Inc.Coating composition thinner for decreasing pollution resulting from the application of a coating composition
US4764362 *22 Oct 198616 Aug 1988The Cook Bates CompanyNail-conditioning emery boards and process for making them
US4772471 *12 Dec 197920 Sep 1988Societe Anonyme Dite: L'orealAqueous dispersions of lipid spheres and compositions containing the same
US4813976 *7 Apr 198821 Mar 1989The Cook Bates CompanyNail-conditioning emery boards and process for making them
US4828542 *29 Aug 19869 May 1989Twin Rivers EngineeringFoam substrate and micropackaged active ingredient particle composite dispensing materials
US4844885 *8 Apr 19874 Jul 1989Production PreviewsNail polish with microencasulated remover
US4897308 *8 Jun 198830 Jan 1990L'orealEncapsulation
US5039243 *7 Jul 198713 Aug 1991Minnesota Mining And Manufacturing CompanyFragrance releasing crayons
US5098621 *10 Apr 198924 Mar 1992Twin Rivers EngineeringSpreading a layer of micropackaged active material, mixing with surfactants and polyurethanes, molding and suspension
US5135747 *17 May 19914 Aug 1992Chesebrough-Pond's Usa Co., Division Of Conopco, Inc.Deodorant/antiperspirant products with fragrance and encapsulated odor counteractant
US5194262 *6 Aug 199116 Mar 1993Revlon Consumer Products CorporationEncapsulated antiperspirant salts and deodorant/antiperspirants
US5344583 *26 Aug 19936 Sep 1994Dotolo Research Corp.Solvent, surfactant, polyethersiloxane
US5346652 *16 Mar 199213 Sep 1994Dotolo Research CorporationLinonene, methylpyrrolidone, cetyl acetate
US5360580 *8 Apr 19921 Nov 1994Dotolo Research CorporationCleaning composition
US5372742 *22 Jan 199313 Dec 1994Dotolo Research CorporationNail polish remover
US5464555 *12 Oct 19947 Nov 1995Dotolo Research CorporationGraphic ink remover solution
US5824724 *20 Jan 199820 Oct 1998The Lamson & Sessions Co.Plastic conduit or pipe having surface coated with pressure rupturable microcapsules comprising water-insoluble polymer and volatile solvent for bonding with other plastic pipes, connectors
US5877236 *20 Jan 19982 Mar 1999The Lamson & Sessions Co.Using water insoluble polymer
US5922798 *20 Jan 199813 Jul 1999The Lamson & Sessions Co.Consists of water insoluble polymer selected from polyvinyl chloride or chlorinated polyvinyl chloride, polycarbonate, acrylonitrile-butadiene-styrene, polyacrylate, polystyrene blends and copolymers, and a volatile solvent
US6004417 *20 Jan 199821 Dec 1999The Lamson & Sessions Co.Applying rupturable microcapsules encapsulating solvent adhesive composition to polymeric surface of conduit, rupturing capsules, partially dissolving and cementing surfaces
US7452547 *31 Mar 200418 Nov 2008Johnson&Johnson Consumer Co., Inc.Product for treating the skin comprising a polyamine microcapsule wall and a skin lightening agent
US806644430 Nov 200629 Nov 2011Kimberly-Clark Worldwide, Inc.Disposable wipe with substance-filled blisters
EP1669054A2 *30 Nov 200514 Jun 2006L'orealCosmetic composition comprising capsules containing one or more actives, and use thereof
WO1982000151A1 *7 Jul 198021 Jan 1982Grow Group IncA composition and method for decreasing pollution resulting from the application of a coating composition
WO1993018734A1 *11 Mar 199330 Sep 1993Dotolo Enterprises IncNail polish remover composition
WO1994016671A1 *24 Jan 19944 Aug 1994Dotolo Res CorpNail polish remover
WO2013179074A1 *28 May 20125 Dec 2013ICC S.r.l.Cosmetic composition for the treatment of hands and/or feet
U.S. Classification15/104.93, 401/132, 428/402.22, 424/401, 252/364, 424/61, 428/402.2
International ClassificationA61K8/11, A45D29/00, C09D9/00, A61K8/02, A61Q3/04
Cooperative ClassificationA61K8/11, C09D9/00, A61K8/0208, A61K2800/412, A61Q3/04
European ClassificationA61K8/11, C09D9/00, A61Q3/04, A61K8/02C