Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1998-08-27
2002-03-05
Dudash, Diana (Department: 1619)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
Reexamination Certificate
active
06352963
ABSTRACT:
Applicants reference herein the patent applications of ROLAND RAMIN for Ser. No. 09/141,515 entitled THICKENED FILM-FORMING COMPOSITION and PASCAL ARNAUD for Ser. No. 09/141,514 entitled THICKENED COMPOSITION COMPRISING FUSED SILICA both filed on even date herewith and incorporate the disclosures thereof specifically by reference herein.
The present invention relates to make-up-removing compositions and to the use, for the preparation of a composition and/or in a composition for removing make-up from keratinous material, of a polysaccharide alkyl ether combined with a make-up-removing system. In particular, this composition is intended for removing make-up from keratinous material such as the nails, the eyelashes, the eyebrows, the hair and the skin (cheeks, forehead, neck, eyelids).
The compositions conventionally used for removing make-up from keratinous material are generally in the form of a lotion or a milk. In addition, they contain oils and/or surfactants which allow the make-up to be removed. Such a composition is described in particular in patent application EP-A-705,592.
Although very effective, these known compositions have a certain number of drawbacks. In particular, they are often difficult to take up and can run between the fingers.
In order to thicken the compositions, it is known to add a thickener to the composition. When the composition mainly comprises a non-aqueous phase, i.e. the composition comprises either an organic solvent or an oil, a thickener of lipophilic nature is used, in a known manner. Thus, a clay such as bentonite can be used, for example, to thicken a fatty phase, but this clay has the drawback of making the thickened composition opaque.
It is also known to use fused silica to thicken a non-aqueous phase, but the compositions thus thickened have a tendency to be translucent.
In addition, these thickeners of lipophilic nature are only compatible with a limited number of solvents and oils commonly used in make-up-removing products, thus limiting the variety of formulations of these compositions.
There is a need to have available a make-up-removing product in more or less fluid, gelled form which has both transparency properties and good rheology.
The inventors have observed that this aim can be achieved by using, as thickener, a specific polysaccharide alkyl ether in a make-up-removing composition. This thickener makes it possible to prepare make-up-removing compositions in gelled form which can be transparent. These gelled compositions moreover have good rheology, which can range from a fluid texture to a thick texture, according to the manufacturer's wishes.
In addition, this thickener is compatible with many solvents and oils, thus allowing a wide variety of solvents and oils to be used in the make-up-removing compositions and allowing novel cosmetic products to be envisaged.
A subject of the invention is thus the use, for the preparation of a composition and/or in a composition for removing make-up from keratinous material, of a polysaccharide alkyl ether formed of units containing at least two different saccharide rings, each unit containing at least one hydroxyl group substituted with a saturated hydrocarbon-based alkyl chain combined with a make-up-removing system comprising at least one non-aqueous solvent and/or an oil.
In the thickener according to the invention, the term “hydrocarbon-based alkyl chain” is understood to refer to a linear or branched chain preferably containing from 1 to 24, more preferably from 1 to 10, better still from 1 to 6 and more especially from 1 to 3, carbon atoms. In particular, the alkyl chain is selected from ethenyl and propenyl and preferably saturated chains and in particular methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl and n-pentyl. These alkyl ethers can be manufactured as described in documents EP-A-281,360 and EP-A-708,114, the disclosures of which are specifically incorporated by reference herein.
According to a preferred embodiment of the invention, the polysaccharide alkyl ether has a weight-average molecular weight preferably of greater than 100,000, and more preferably greater than 200,000. This molecular weight can be up to 1 million. This alkyl ether can preferably contain from one to six, and better still from two to four, hydroxyl groups per unit, substituted with a saturated or unsaturated hydrocarbon-based alkyl chain.
The saccharide rings are selected in particular from mannose, galactose, glucose, furanose, rhamnose and arabinose.
According to a preferred embodiment of the invention, the polysaccharide alkyl ether is an alkyl ether of a gum and more particularly of a gum which is nonionic overall, i.e. one which contains few or no ionic groups. As appropriate gums, mention may be made, for example, of guar gum, in which the unit comprises a galactose and a mannose, carob gum, in which the unit comprises a galactose and a mannose, karaya gum, which is a complex mixture of rhamnose, galactose and galacturonic acid, and gum tragacanth, which is a complex mixture of arabinose, galactose and galacturonic acid.
According to a preferred embodiment of the invention, the polysaccharide alkyl ether is a guar gum derivative. Thus, advantageously, the alkyl ether is preferably an alkyl galactomannan with a C
1
to C
6
, and better still C
1
to C
3
, alkyl chain and more particularly ethyl guar having a degree of substitution of from 2 to 3 and in particular from about 2.5 to 2.8, as described in the documents RD 95378007 (October 1995) and EP-A-708,114, the disclosures of which are specifically incorporated herein by reference. This gum is in particular that sold by the company Aqualon under the names N-HANCE-AG 200® and N-HANCE AG 50®.
The concentration of alkyl ether depends on the desired pharmaceutical form and consistency for the make-up-removing composition. In particular, the weight ratio of the amount of solvent and/or of oil to the amount of thickener is selected, for example, in the range preferably from 5 to 1000. The composition according to the invention can contain, for example, an amount of polysaccharide alkyl ether preferably ranging from 0.1 to 20% of the total weight of the composition, more preferably from 2% to 8% by weight and better still from 3% to 6% by weight.
According to the invention, the expression make-up-removing system is understood to refer to a compound or a mixture of compounds having the property of removing the make-up present on keratinous material.
The make-up-removing system can comprise at least one non-aqueous solvent (or said organic solvent) or at least one make-up-removing oil or at least one surfactant, or mixtures thereof.
The make-up-removing system is selected depending on the nature of the make-up to be removed.
According to a first embodiment of the invention, the make-up-removing system can comprise at least one organic solvent. This solvent can be selected in particular from:
ketones that are liquid at room temperature, such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone and acetone;
alcohols that are liquid at room temperature, such as ethanol, isopropanol, diacetone alcohol, 2-butoxyethanol and cyclohexanol;
glycols that are liquid at room temperature, such as ethylene glycol, propylene glycol and pentylene glycol;
propylene glycol ethers that are liquid at room temperature, such as propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate and dipropylene glycol mono-n-butyl ether;
esters with a short chain, (having from 3 to 8 carbon atoms in total), such as ethyl acetate, methyl acetate, propyl acetate, n-butyl acetate and isopentyl acetate;
ethers that are liquid at room temperature, such as diethyl ether, dimethyl ether and dichlorodiethyl ether;
alkanes that are liquid at room temperature, such as decane, heptane, dodecane and cyclohexane;
aromatic cyclic compounds that are liquid at room temperature, such as toluene and xylene;
aldehydes that are liquid at room temperature, such as benzaldehyde and acetaldehyde.
Esters and ketones having not mo
Arnaud Pascal
Ramin Roland
Berman Alysia
Dudash Diana
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal (S.A.)
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