WO2003085190A2 - Soil and stain removal - Google Patents

Soil and stain removal Download PDF

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Publication number
WO2003085190A2
WO2003085190A2 PCT/EP2003/003376 EP0303376W WO03085190A2 WO 2003085190 A2 WO2003085190 A2 WO 2003085190A2 EP 0303376 W EP0303376 W EP 0303376W WO 03085190 A2 WO03085190 A2 WO 03085190A2
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WO
WIPO (PCT)
Prior art keywords
phase
soil
container
detergent
removal
Prior art date
Application number
PCT/EP2003/003376
Other languages
French (fr)
Other versions
WO2003085190A3 (en
Inventor
John Hawkins
Christopher David Slevin
Original Assignee
Huntsman International Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huntsman International Llc filed Critical Huntsman International Llc
Priority to EP03722375A priority Critical patent/EP1492866A2/en
Priority to AU2003229588A priority patent/AU2003229588A1/en
Publication of WO2003085190A2 publication Critical patent/WO2003085190A2/en
Publication of WO2003085190A3 publication Critical patent/WO2003085190A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols
    • C11D1/721—End blocked ethers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
    • C11D2111/46—

Definitions

  • the invention relates to soil and stain removal, and in particular to compositions in gel form for application to localised areas of fabric or other surfaces to facilitate the removal of stains.
  • Prespotters are often applied in the form of a detergent liquid to stains on clothes prior to laundering. Problems that may be encountered when using prespotters include spillage and a potential for mess. Powders are generally less convenient to use and less effective than liquid prespotters, and also have potential to create mess.
  • the invention provides a method of facilitating the removal of stains and/or soil from surfaces, which comprises heating a Vl-phase detergent composition above its melting point, applying it, prior to melting, or preferably in the molten state to the stained and/or soiled surface, optionally allowing it to cool and reform the Nl-phase, and subsequently removing it from the surface.
  • Vl-phases which are commonly referred to as ringing gels, are a well-known group of liquid crystal phases characterised by cubic symmetry, as revealed by X-ray diffraction, and easily recognisable as optically isotropic, immobile gels, which vibrate when struck, whence their common name.
  • Vl-phase the commonest and most preferred, for the purposes of this invention.
  • the latter is usually envisaged as comprising a cubic array of spherical micelles in a continuous aqueous medium and forms at concentrations intermediate between the mobile, optically isotropic Ll-phase and the viscous, optically anisotropic, hexagonally symmetrical H- phase (which is sometimes also referred to as the M-phase).
  • the Vl-phase tends to form Ll-phase micellar solutions directly on dilution or warming.
  • the V2-phase is envisaged as the inverse of the Vl-phase, with the surfactant as the continuous medium and the water as the cubically arrayed dispersed phase.
  • the II- and I2-phases are bicontinuous phases located respectively at concentrations between the H- and L ⁇ - (lamellar) phase, and between the L ⁇ - and H2-phases.
  • Vl-phase has a melting point (VI/L transition temperature) above 30°C more preferably above 40°, most preferably above 45°C, but below 80°C, more preferably below 70°, even more preferably below 60°C, most preferably below 55°C.
  • the surfactant typically comprises an ethoxylated non-ionic surfactant, e.g. an ethoxylated fatty or synthetic alcohol having: from 8 to 25 carbon atoms, usually 10 to 20, especially 12 to 18; and up to 50, usually up to 30, especially 3 to 20, ethyleneoxy groups.
  • ethoxylated non-ionic surfactant e.g. an ethoxylated fatty or synthetic alcohol having: from 8 to 25 carbon atoms, usually 10 to 20, especially 12 to 18; and up to 50, usually up to 30, especially 3 to 20, ethyleneoxy groups.
  • ethoxylated non-ionic surfactant e.g. an ethoxylated fatty or synthetic alcohol having: from 8 to 25 carbon atoms, usually 10 to 20, especially 12 to 18; and up to 50, usually up to 30, especially 3 to 20, ethyleneoxy groups.
  • ethoxylated fatty acids ethoxylated amine
  • the surfactant may also comprise alkanolamides amine oxides, and/or amphoteric or zwitterionic surfactants, typically in proportions less than 50% by weight of the total surfactant, usually less than 40%, preferably less than 30%, more preferably less than 20%, e.g. less than 15%, often less than 10%, most preferably less than 5%. Less preferably, the surfactant may comprise small amounts of anionic, or of cationic surfactant.
  • the invention is applicable to the prespotting of fabrics, such as clothes upholstery or carpets, the cleaning of hard surfaces such as walls, floors, work-surfaces, alloy wheel trim or toilet bowls, either domestic or in industrial and institutional environments such as hospitals, factories or abattoirs, or in removing deposits such as chewing gum or animal excrement from paths.
  • a preferred embodiment of the invention provides a ringing gel adapted for use according to the invention, packed in a microwaveable container.
  • the container may be a multi-dose bottle or jar of a material, which is transparent to microwaves, such as glass or plastic, and may optionally be fitted with liquid-dispensing means, such as an atomiser or spray attachment, or an applicator nozzle, optionally provided with distribution means, such as a porous pad of, e.g. polyurethane foam.
  • the container may be a unit dose sachet or ampoule.
  • the invention provides an absorptive pad impregnated with the ringing gel.
  • the pad may be of polyurethane or rubber foam, or of a non-woven fabric. It may be provided with a handle, to enable it conveniently to be heated by temporary immersion in hot water, as an alternative to microwaving, and also to facilitate rubbing of the stain with the heated pad.
  • the pad may be attached to one side of a base plate, or the inside of a dish of lesser depth than the pad, e.g. by means of adhesive or an inward projection or projections or incurved rim on the side of the dish, and a handle may be attached to the other side.
  • the pad is protected, when not in use, by a removable cover, such as a screw-on, snap-on or hinged lid.
  • a further embodiment of the invention provides a gel adapted for use according to the invention packed in a self-heating can, for use in situations where an independent source of heat is not available.
  • Self-heating cans of the type conventionally used for heating food or beverages may be employed.
  • the gel may comprise auxiliary cleaning adjuvants such as enzymes, bleach, stain removers, e.g. phosphonates, abrasive particles, optical brighteners, builders, e.g. citrates, carbonates, condensed phosphates or zeolites, alkalis, dyes, perfumes and preservatives.
  • auxiliary cleaning adjuvants such as enzymes, bleach, stain removers, e.g. phosphonates, abrasive particles, optical brighteners, builders, e.g. citrates, carbonates, condensed phosphates or zeolites, alkalis, dyes, perfumes and preservatives.
  • the molten gel may be maintained in a heated reservoir.
  • a VI ringing gel comprised:
  • the gel was melted at 50°C and charged to a plastic spray applicator. After cooling to ambient temperature the gel reformed. It showed no tendency to leak when the container was punctured or damaged.
  • the container was placed in a microwave oven and heated until the gel was fluid.
  • the fluid was sprayed onto an area of fabric, where it cooled and set rapidly.
  • the cooled gel showed no tendency to migrate to unsprayed areas, but was easily rinsed off the fabric with cold water.
  • Example I was repeated using a self-heating can, of a type used commercially to heat coffee, in order to effect melting, with similar results.
  • Example II 0.5% opacifier (LYTRON® 621) and 0.15% Perfume were added to the mixture of Example I, giving a perfumed, opaque ringing gel.
  • Ci6-is alkyl 20 mole ethoxylate EMPLLAN® KM20
  • EMPLLAN® KM20 Ci6-is alkyl 20 mole ethoxylate
  • the other alkoxylates used were:
  • Blends may be selected for use according to the invention, which are in the Vl-phase at normal ambient temperature.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

The invention provides a method of facilitating the removal of stains and/or soil from surfaces, which comprises heating a VI-phase detergent composition above its melting point, applying it in the molten state to the stained and/or soiled surface, allowing it to cool and reform the VI-phase, and subsequently removing it from the surface.

Description

SOIL AND STAIN REMOVAL
The invention relates to soil and stain removal, and in particular to compositions in gel form for application to localised areas of fabric or other surfaces to facilitate the removal of stains.
Prespotters are often applied in the form of a detergent liquid to stains on clothes prior to laundering. Problems that may be encountered when using prespotters include spillage and a potential for mess. Powders are generally less convenient to use and less effective than liquid prespotters, and also have potential to create mess.
A particular problem with food stains on clothes is that they are often only treatable if they are washed promptly. However at mealtimes, especially when eating out, this may be impossible, or highly inconvenient.
We have now discovered that detergents in the form of Vl-phase, ringing gels can be melted, applied to stained surfaces in the molten state, and subsequently removed, by laundering, by rinsing off with cold water or, in the case of non-absorbent surfaces, by wiping or peeling off. The novel prespotting method provides more effective stain and soil removal, together with significantly reduced risk of spillage and mess. Moreover it permits stains to be treated promptly before they have dried and become fixed, without substantial wetting of the fabric. They can then be laundered at a later, more convenient time
The invention provides a method of facilitating the removal of stains and/or soil from surfaces, which comprises heating a Vl-phase detergent composition above its melting point, applying it, prior to melting, or preferably in the molten state to the stained and/or soiled surface, optionally allowing it to cool and reform the Nl-phase, and subsequently removing it from the surface. In the following discussion of the invention, unless stated to the contrary, the disclosure of alternative values for the upper or lower limit of the permitted range of a parameter, coupled with an indication that one of said values is more highly preferred than the other, is to be construed as an implied statement that each intermediate value of said parameter, lying between the more preferred and the less preferred of said alternatives, is itself preferred to said less preferred value and also to each value lying between said less preferred value and said intermediate value.
Vl-phases, which are commonly referred to as ringing gels, are a well-known group of liquid crystal phases characterised by cubic symmetry, as revealed by X-ray diffraction, and easily recognisable as optically isotropic, immobile gels, which vibrate when struck, whence their common name.
Four different Vl-phases have been proposed, of which the commonest and most preferred, for the purposes of this invention is the Vl-phase. The latter is usually envisaged as comprising a cubic array of spherical micelles in a continuous aqueous medium and forms at concentrations intermediate between the mobile, optically isotropic Ll-phase and the viscous, optically anisotropic, hexagonally symmetrical H- phase (which is sometimes also referred to as the M-phase). The Vl-phase tends to form Ll-phase micellar solutions directly on dilution or warming. The V2-phase is envisaged as the inverse of the Vl-phase, with the surfactant as the continuous medium and the water as the cubically arrayed dispersed phase. It is sometimes formed at concentrations intermediate between the H2 (inverse hexagonal) phase and the L2 (inverse micellar) phase. The II- and I2-phases are bicontinuous phases located respectively at concentrations between the H- and Lα- (lamellar) phase, and between the Lα- and H2-phases.
A number of surfactants, especially non-ionic surfactant mixtures, form Vl-phases suitable for use according to the present invention, typically over a concentration range lying somewhere between 28 and 50% by weight active. We prefer to use mixtures of non-ionic surfactants having a mean HLB between 8 and 16, preferably greater than 9, more preferably greater than 10, even more preferably greater than 11, more preferably still, greater than 12, most preferably greater than 12.5, but preferably less than 15.5, more preferably less than 15, most preferably less than 14.5.
We prefer that the Vl-phase has a melting point (VI/L transition temperature) above 30°C more preferably above 40°, most preferably above 45°C, but below 80°C, more preferably below 70°, even more preferably below 60°C, most preferably below 55°C.
The surfactant typically comprises an ethoxylated non-ionic surfactant, e.g. an ethoxylated fatty or synthetic alcohol having: from 8 to 25 carbon atoms, usually 10 to 20, especially 12 to 18; and up to 50, usually up to 30, especially 3 to 20, ethyleneoxy groups. We generally prefer to use mixtures of alkyl ethoxylates. Alternatively, or additionally, we may use ethoxylated fatty acids, ethoxylated amines, ethoxylated glyceryl or sorbitan esters, ethoxy/propoxy block copolymers, alkyl polyglycosides and/or sugar esters. The surfactant may also comprise alkanolamides amine oxides, and/or amphoteric or zwitterionic surfactants, typically in proportions less than 50% by weight of the total surfactant, usually less than 40%, preferably less than 30%, more preferably less than 20%, e.g. less than 15%, often less than 10%, most preferably less than 5%. Less preferably, the surfactant may comprise small amounts of anionic, or of cationic surfactant.
The invention is applicable to the prespotting of fabrics, such as clothes upholstery or carpets, the cleaning of hard surfaces such as walls, floors, work-surfaces, alloy wheel trim or toilet bowls, either domestic or in industrial and institutional environments such as hospitals, factories or abattoirs, or in removing deposits such as chewing gum or animal excrement from paths.
For prespotting applications, we prefer to melt the product by microwaving, and a preferred embodiment of the invention provides a ringing gel adapted for use according to the invention, packed in a microwaveable container. The container may be a multi-dose bottle or jar of a material, which is transparent to microwaves, such as glass or plastic, and may optionally be fitted with liquid-dispensing means, such as an atomiser or spray attachment, or an applicator nozzle, optionally provided with distribution means, such as a porous pad of, e.g. polyurethane foam. Alternatively, the container may be a unit dose sachet or ampoule.
According to a further embodiment, the invention provides an absorptive pad impregnated with the ringing gel. The pad may be of polyurethane or rubber foam, or of a non-woven fabric. It may be provided with a handle, to enable it conveniently to be heated by temporary immersion in hot water, as an alternative to microwaving, and also to facilitate rubbing of the stain with the heated pad. For example, the pad may be attached to one side of a base plate, or the inside of a dish of lesser depth than the pad, e.g. by means of adhesive or an inward projection or projections or incurved rim on the side of the dish, and a handle may be attached to the other side. Preferably the pad is protected, when not in use, by a removable cover, such as a screw-on, snap-on or hinged lid.
A further embodiment of the invention provides a gel adapted for use according to the invention packed in a self-heating can, for use in situations where an independent source of heat is not available. Self-heating cans of the type conventionally used for heating food or beverages may be employed.
The gel may comprise auxiliary cleaning adjuvants such as enzymes, bleach, stain removers, e.g. phosphonates, abrasive particles, optical brighteners, builders, e.g. citrates, carbonates, condensed phosphates or zeolites, alkalis, dyes, perfumes and preservatives.
For large scale, e.g. industrial or institutional applications, the molten gel may be maintained in a heated reservoir.
The invention is illustrated by the following examples, in which all percentages are by weight active material based on the total weight of the gel, unless stated to the contrary: EXAMPLE I
A VI ringing gel comprised:
Figure imgf000006_0001
The gel was melted at 50°C and charged to a plastic spray applicator. After cooling to ambient temperature the gel reformed. It showed no tendency to leak when the container was punctured or damaged.
The container was placed in a microwave oven and heated until the gel was fluid. The fluid was sprayed onto an area of fabric, where it cooled and set rapidly. The cooled gel showed no tendency to migrate to unsprayed areas, but was easily rinsed off the fabric with cold water.
EXAMPLE π
Example I was repeated using a self-heating can, of a type used commercially to heat coffee, in order to effect melting, with similar results.
EXAMPLE πi
0.5% opacifier (LYTRON® 621) and 0.15% Perfume were added to the mixture of Example I, giving a perfumed, opaque ringing gel.
EXAMPLE IV
A number of 40% active blends of Ci6-is alkyl 20 mole ethoxylate (EMPLLAN® KM20), with varying proportions of other fatty alcohol alkoxylates were prepared, and the "melting point" (i.e. the Vl-phase/micellar phase transition temperature) of each blend was observed. The other alkoxylates used were:
1. C,M alkyl 6.5 mole ethoxylate/ 3.5 mole propoxylate (EMPILAN® PF7169)
2. C9.11 alkyl 6 mole ethoxylate (EMPILAN® KR6)
3. C12-14 alkyl 10 mole ethoxylate (EMPILAN® KB 10)
The results were as follows;
% Empilan PF7169 Melting Range
10 40 - 45°C
12 35-40°C
14 30-35°C
18 20 - 30°C
20 <20°C
22 <20°C
% Empilan KR6 Melting Range
10 40 - 45°C
12 35-40°C
14 30-35°C
18 <20°C
20 <20°C
22 <20°C
% Empilan KB10 Melting Range
10 50-60°C
12 50 - 60°C
14 50 - 60°C
18 50 - 60°C
20 50 - 60°C
22 50 - 60°C
Blends may be selected for use according to the invention, which are in the Vl-phase at normal ambient temperature.

Claims

1. A method of facilitating the removal of stains and/or soil from a surface, which comprises heating a Vl-phase detergent composition above its melting point, applying it, either prior to melting, or in the molten state to the stained and/or soiled surface, and subsequently removing it from the surface.
2. A method according to claim 1 wherein the molten detergent is allowed to cool and reform the Vl-phase prior to removal from the surface.
3. A method according to either of claims 1 and 2, wherein the Vl-phase is removed by laundering and/or rinsing.
4. A means for performing the method of claim 1, which comprises a Vl-phase detergent, packed in a microwaveable container.
5. Means according to claim 4, wherein the container is a multi-dose bottle or jar of a material, which is transparent to microwaves and is provided with liquid- dispensing means.
6. Means according to claim 5, wherein the liquid dispensing means comprises an atomiser or spray attachment, or an applicator nozzle.
7. Means according to claim 4, wherein the container is a unit dose sachet or ampoule.
8. A means for performing the method of claim 1, which comprises an absorptive pad impregnated with the Vl-phase detergent.
9. A means for performing the method of claim 1, which comprises a Vl-phase detergent, packed in a self-heating can.
PCT/EP2003/003376 2002-04-09 2003-04-01 Soil and stain removal WO2003085190A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03722375A EP1492866A2 (en) 2002-04-09 2003-04-01 Soil and stain removal
AU2003229588A AU2003229588A1 (en) 2002-04-09 2003-04-01 SOIL AND STAIN REMOVALLESS THAN/uGREATER THAN

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0208112.3 2002-04-09
GBGB0208112.3A GB0208112D0 (en) 2002-04-09 2002-04-09 Soil and stain removal

Publications (2)

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WO2003085190A2 true WO2003085190A2 (en) 2003-10-16
WO2003085190A3 WO2003085190A3 (en) 2004-06-24

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AU (1) AU2003229588A1 (en)
GB (1) GB0208112D0 (en)
WO (1) WO2003085190A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598335A2 (en) * 1992-11-13 1994-05-25 ALBRIGHT &amp; WILSON LIMITED Novel cleaning compositions
US5968888A (en) * 1998-11-13 1999-10-19 Colgate Palmolive Company Liquid crystal compositions containing a 2 alkyl alkanol and abrasive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598335A2 (en) * 1992-11-13 1994-05-25 ALBRIGHT &amp; WILSON LIMITED Novel cleaning compositions
US5968888A (en) * 1998-11-13 1999-10-19 Colgate Palmolive Company Liquid crystal compositions containing a 2 alkyl alkanol and abrasive

Also Published As

Publication number Publication date
AU2003229588A1 (en) 2003-10-20
AU2003229588A8 (en) 2003-10-20
WO2003085190A3 (en) 2004-06-24
GB0208112D0 (en) 2002-05-22
EP1492866A2 (en) 2005-01-05

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