FR2853544A1 - An oil-in-water emulsion for use in skin care and cleansing compositions comprising a specified amphiphilic polymer based on acrylamidopropane sulfonic acid as a replacement for surfactants - Google Patents

Abstract

An oil-in-water emulsion composition for topical application comprising an oily phases dispersed in an aqueous phase and containing a specified amphiphilic polymer. The composition is most preferably free from surfactants. The amphiphilic polymer is obtainable from one or more alpha,beta -ethylenically unsaturated monomers (A) containing a heteroatom (O, N, S, P, Cl, F) or mixture of heteroatoms and one or more hydrophobic monomers (B) containing: 1. An ethylenically unsaturated terminal group; 2. A hydrophilic part of Formula -(CH 2CH 2O) n-(CH 2CH(CH 3)O) p, n, p : integer 0-30; n + p : 30 or below ; 3. An aliphatic or cycloaliphatic hydrophobic part of Formula C mH 2m+1,m=integer 6-30 . The molar ratio of B to the total of A+B is 35% whenm=15 or less;n+p= 7 or less , 15% or more whenm=15 or less;n+p= 7 or more and 10% or more when m : 16 or more . Independent claims are included for an article obtained by impregnation of a solid support with the claimed composition and for a method of cosmetic treatment of the skin by application of the claimed composition.

Description

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 Fluid composition in the form of an oil-in-water emulsion containing an amphiphilic polymer, and uses thereof in particular cosmetics The present application relates to a fluid composition in the form of an oil-in-water emulsion containing at least one particular amphiphilic polymer, and the use of the said composition, especially for the care, removal of makeup, cleaning and / or perfuming the skin of the body or face, hair and / or lips, and / or for the impregnation of substrates for the preparation of articles for the care, cleaning and / or removing make-up of the skin, lips and / or eyes.

For various reasons related in particular to a better comfort of use (softness, emollience and others), the current cosmetic compositions are most often in the form of an emulsion of the type oil-in-water (O / W) constituted an aqueous dispersant continuous phase and an oily disperse discontinuous phase, or in the form of a water-oil emulsion (W / O) consisting of an oily dispersant continuous phase and an aqueous dispersed discontinuous phase; . O / W emulsions are the most sought after in the cosmetics field because they comprise, as external phase, an aqueous phase, which gives them, when applied to the skin, a cooler, less greasy feel and more light as W / O emulsions.

These emulsions can be more or less fluid. It is sought to obtain fluid emulsions to have compositions of light and fresh texture, also capable of being vaporized. Fluid oil-in-water emulsions contain little or no hydrophilic gelling agents because the presence of hydrophilic gelling agents causes the emulsion to thicken. Thus, these fluid emulsions are generally stabilized by amphiphilic molecules of low molecular weight (<5,000 g / mol) such as emulsifying surfactants of alkylglycerol or alkylpolyoxyethylenated type. However, the emulsions obtained have the disadvantage of being potentially aggressive with respect to the skin, the concentration of surfactants generally being greater than 1% by weight.

Moreover, it has been envisaged to replace the surfactants with amphiphilic polymers, comprising in their chain a hydrophilic part and a hydrophobic part consisting of a fatty chain, such as the alkyl-C 10 -C 30 -acrylate copolymers and acrylic or methacrylic acid, such as the products marketed under the name PEMULEN by Noveon.

However, these polymers thicken the compositions and therefore have the disadvantage of not allowing the production of fluid compositions. Furthermore, the emulsions stabilized by this type of polymer, even subjected to high shear rates, for example by homogenization under pressure, do not make it possible to obtain both fluid and stable emulsions, the instability resulting in creaming. , that is to say a rise of oil at the top of the emulsion.

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 The object of the present invention is to be able to produce fluid-in water fluids, and even very fluid, and nevertheless stable, preferably containing no emulsifying surfactant conventionally used in O / W emulsions (low molecular weight amphiphilic molecules) and having good cosmetic properties without the disadvantages of the prior art.

The Applicant has unexpectedly discovered a new family of polymers for producing such emulsions. The polymers used according to the invention make it possible to prepare fluid oil-in-water emulsions. In addition, the fluid emulsions obtained remain stable over time at room temperature or at higher temperatures.

Thus, the present invention relates to a composition for topical application, in the form of an oil-in-water emulsion comprising an oily phase dispersed in an aqueous phase, characterized in that it contains at least one amphiphilic polymer that can be obtained from one or more α, β-ethylenically unsaturated monomers (A) containing an atom selected from oxygen, nitrogen, sulfur, phosphorus, chlorine, fluorine and mixtures thereof, and one or more hydrophobic monomers (B) containing (i) an ethylenically unsaturated end group, (ii) a hydrophilic moiety of the formula - (CH 2 CH 2 O) n- (CH 2 CH (CH 3) O) where n and p, independently one of the other, denote an integer ranging from 0 to 30, provided that n + p is less than or equal to 30, and (iii) a linear or branched, linear or branched, aliphatic or cycloaliphatic CmH2m + 1 hydrophobic moiety, where m is an integer ranging from 6 to 30, the polymer being such that the proportion in moles (#) of hydrophobic monomer (B) relative to the total amount of moles of monomers (A and B) is (1) greater than or equal to 35% when m is less than or equal to 15 and that n + p is less than 7, (2) greater than or equal to 15% when m is less than or equal to 15 and n + p is greater than or equal to 7, (3) greater than or equal to 10% when m is greater than 15.

By topical application is meant here an external application on keratinous substances, which are in particular the skin, the scalp, the eyelashes, the eyebrows, the nails, the mucous membranes and the hair.

The composition according to the invention being intended for topical application, it contains a physiologically acceptable medium, that is to say compatible with the skin, the mucous membranes, the hair and the scalp.

Admittedly, it is known to use amphiphilic polymers obtained from [alpha], β-ethylenically unsaturated monomers and hydrophobic monomers. Thus, the document EP-A-1,069,142 generally describes water-soluble polymers obtained by radical polymerization of a macromonomer containing a hydrophilic block of polyoxyalkylene type and a hydrophobic block comprising from 1 to 30 carbon atoms, with an ethylenically unsaturated comonomer. these polymers can be used as thickener, emulsifier, dispersant and suspending agent, especially in the cosmetics field. However, this document does not specifically describe the particular polymers used in the present application, and, in addition, the described polymers.

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 in this document do not allow to obtain stable fluid emulsions as shown in the comparative examples presented below.

The composition of the invention is preferably fluid, its viscosity generally ranging from 0.001 to 1 Pa.s, preferably from 0.003 to 0.5 Pa.s, this viscosity being measured at 25 ° C. using the Rheomat 180 viscometer. at a shear rate of 200 S-1, usually at motive 1.

Moreover, this composition has a homogeneous texture and pleasant to the application and is very stable to conservation. By "stable" is meant a composition which, after two months of storage or more at all temperatures between 4 C and 50 C, shows no macroscopic change in color, odor or viscosity, no change in pH, or microscopic change of appearance.

Advantageously, the emulsion of the invention is free of surfactant conventionally used in O / W and thus has the advantage of not being irritating for particularly sensitive skin. In addition, this emulsion because it can be prepared at room temperature, has the advantage of allowing the incorporation of heat-sensitive active ingredients.

According to a preferred embodiment of the invention, the emulsions according to the invention are subjected after emulsification, to a homogenization step under high pressure, that is to say under a pressure greater than 300 bar, which allows to obtain oil droplets having a number average size of less than 1 micron.

Polymers The composition contains at least one amphiphilic polymer, this polymer being water-soluble or water-dispersible.

In the present patent application, the term "polymer" means a copolymer that can be obtained from at least one monomer (A) and at least one monomer (B).

Furthermore, the term "water-soluble or water-dispersible polymer" means a polymer which, introduced into water at a concentration equal to 1% by weight, leads to a macroscopically homogeneous solution whose light transmittance, at a length of A wave equal to 500 nm, through a 1 cm thick sample, is at least 10%, which corresponds to an absorbance [abs = log (transmittance)] less than 1.5.

 The amphiphilic polymer used in the composition of the invention is capable of being obtained from one or more monomers (A) with [alpha] unsaturated, ss-ethylenic, containing an atom selected from oxygen, nitrogen , sulfur, phosphorus, chlorine, fluorine and mixtures thereof, and one or more hydrophobic monomers (B) containing (i) an ethylenically unsaturated terminal group, (ii) a hydrophilic portion of the formula - (CH2CH2O) n Where n and p, independently of each other, denote an integer ranging from 0 to 30, preferably from 1 to 25 and more preferably from 3 to 20 with the proviso that n + p

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 is less than or equal to 30, preferably less than 25 and even more preferably less than 20, which means that n + p can range from 0 to 30, preferably from 0 to 25 and better still from 0 to 20, and (iii) a linear or branched, linear or branched aliphatic or cycloaliphatic CmH2m + 1 type hydrophobic part, where m is an integer ranging from 6 to 22, and the molar proportion (#) of hydrophobic monomer (B) relative to the total amount of moles; of monomers (A and B) being (1) greater than or equal to 35%, and preferably greater than or equal to 40%, when m is less than or equal to 15 and that n + p is less than 7, (2) greater than or equal to 15%, and preferably greater than or equal to 20% when m is less than or equal to 15 and n + p is greater than or equal to 7, (3) greater than or equal to 10%, and preferably greater than or equal to equal to 15%, when m is greater than 15, regardless of the value of n + p between 0 and 30.

According to a particular embodiment of the invention, in the formula indicated above, the sum n + p is an integer equal to or greater than 1 (n + p 1).

The molar proportion (#) of hydrophobic monomer (B) corresponds to the grafting rate of the polymers.

Typically, the aqueous solutions of the polymers used according to the invention have, at a concentration of 1% by weight of polymer, a viscosity of less than 1 Pa.s at a shear rate of 1 S-1, the viscosity being measured at 25 ° C. using an RS 150 (Haake) imposed stress rheometer.

The amphiphilic polymers according to the invention generally have a number-average molecular weight ranging from 50,000 to 10,000,000, preferably from 100,000 to 8,000,000 and more preferably from 100,000 to 7,000,000.

The monomers (A) with [alpha], β-ethylenic unsaturation contain at least one oxygen atom, a nitrogen atom, a sulfur atom, a phosphorus atom, a chlorine atom and / or a fluorine atom. . It is preferably a sulfur or phosphorus atom, and preferably the monomer A has a strong acid function, in particular a sulfonic acid or phosphonic acid function.

In particular, the polymers used according to the invention are preferably amphiphilic polymers obtained from at least one ethylenically unsaturated monomer containing a sulphonic group, in free form or partially or completely neutralized, as monomer (A).

acides (méth)acrylamido(Cl-C,)alkylsulfoniques, ainsi que leurs formes partiellement ou totalement neutralisées, et leurs mélanges. The ethylenically unsaturated monomers containing a sulfonic group may be chosen in particular from vinylsulfonic acid, styrenesulfonic acid,

(meth) acrylamido (C1-C4) alkylsulfonic acids, and their partially or completely neutralized forms, and mixtures thereof.

According to a preferred embodiment of the invention, the (meth) acrylamido (C1-C8) alkylsulphonic acids, such as for example acrylamido acid, are used as ethylenically unsaturated monomers containing a sulfonic group.

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 methanesulfonic acid, acrylamido-ethanesulfonic acid, acrylamidopropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-methacrylamido-2-methylpropanesulfonic acid, 2-acrylamido acid n-butanesulfonic acid, 2-acrylamido-2,4,4-trimethylpentanesulfonic acid, and their partially or completely neutralized forms, and mixtures thereof.

More particularly, the monomer (A) used is 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and its partially or completely neutralized forms.

Preferably, the polymers in accordance with the invention are partially or completely neutralized with a mineral base (sodium hydroxide, potassium hydroxide, aqueous ammonia) or an organic base such as mono-, di- or tri-ethanolamine, anaminomethylpropanediol, N- methylglucamine, basic amino acids such as arginine and lysine, and mixtures of these compounds.

The hydrophobic monomer B has an ethylenically unsaturated terminal group, a hydrophobic moiety CmH2m + 1, and preferably a hydrophilic part of the formula - (CH2CH2O) n- (CH2CH (CH3) O) p, where n + p is # 1.

The ethylenically unsaturated terminal group of the hydrophobic monomer B may be chosen especially from hydrophilic monomers containing ethylenic unsaturation, such as, for example, acrylic acid, methacrylic acid, acrylamide, methacrylamide, and mixtures thereof.

The hydrophilic portion of the formula - (CH 2 CH 2 O) n - (CH 2 CH (CH 3) O) p is as indicated above, n and p, independently of each other, denoting an integer ranging from 0 to 30 preferably from 1 to 25 and more preferably from 3 to 20 with the proviso that n + p is less than or equal to 30, preferably less than 25 and even more preferably less than 20. As already indicated above, n + p is preferably 1.

The hydrophobic part CmH2m + 1 comprises from 6 to 30 carbon atoms, preferably from 6 to 22 carbon atoms, more preferably from 6 to 18 carbon atoms and even more preferably from 12 to 18 carbon atoms. This hydrophobic part may be chosen for example from C 6 -C 30, preferably C 6 -C 18, linear (for example hexyl, octyl, decyl, dodecyl, hexadecyl, octadecyl, tetradecyl, oleyl), branched (for example isostearic) alkyl radicals. ) or cyclic (for example cyclododecane or adamantane). Among these hydrophobic radicals, linear and branched alkyl radicals are more particularly preferred.

 The hydrophobic monomers (B) of the polymer used according to the invention are preferably chosen from the acrylates of formula (1) below:

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dans laquelle n et p, indépendamment l'un de l'autre désignent un nombre de moles et varie de 0 à 30, de préférence de 1 à 25 et plus préférentiellement de 3 à 20, sous réserve que n + p soit inférieur ou égal à 30, de préférence inférieur à 25 et encore mieux inférieur à 20 ; R, désigne un atome d'hydrogène ou un radical alkyle linéaire ou ramifié en C1-C6 (de préférence méthyle) ; et R désigne le radical CmH2m+1 tel que défini ci-dessus. Comme déjà indiqué ci-dessus, n+p est de préférence > 1.

in which n and p, independently of one another, denote a number of moles and range from 0 to 30, preferably from 1 to 25 and more preferably from 3 to 20, provided that n + p is less than or equal to at 30, preferably less than 25 and more preferably less than 20; R denotes a hydrogen atom or a linear or branched C1-C6 alkyl radical (preferably methyl); and R denotes the radical CmH2m + 1 as defined above. As already indicated above, n + p is preferably> 1.

As indicated above, the preferred amphiphilic polymers according to the invention are those derived from AMPS, and they can be crosslinked or uncrosslinked. According to a preferred embodiment of the invention, they are preferably uncrosslinked.

When the polymers are crosslinked, the crosslinking agents may be chosen from the olefinically polyunsaturated compounds commonly used for crosslinking the polymers obtained by 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, tetraallyloxyethane, tetraethylene glycol diacrylate and the like. triallylamine, trimethylolpropane diallyl ether, methylenebisacrylamide, allyl ethers of alcohols of the sugar series, allyl methacrylate, trimethylol propane triacrylate (TMPTA) or mixtures thereof. The crosslinking agent is preferably chosen from methylene-bis-acrylamide, allyl methacrylate or trimethylol propane triacrylate (TMPTA). The degree of crosslinking preferably ranges from 0.01 to 10 mol% and more particularly from 0.2 to 2 mol% relative to the polymer.

The polymers used in accordance with the invention may also be chosen from AMPS random amphiphilic polymers modified by reaction with a n-monoalkylamine or a C6-C22 di-n-alkylamine, such as those described in document WO-A-2. 00/31154 (forming an integral part of the content of the description).

The polymers of the invention may additionally contain one or more other hydrophilic ethylenically unsaturated monomers chosen, for example, from acrylic acid, methacrylic acid or their substituted alkyl derivatives or their esters obtained with mono or polyalkylene glycols. acrylamide, methacrylamide, vinylpyrrolidone, itaconic acid, maleic acid and mixtures thereof.

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The polymers of the invention may furthermore contain one or more hydrophobic comonomers with ethylenic unsaturation, comprising, for example: a fluorinated or alkylfluorinated C6-C18 radical (for example the group of formula - (CH2) 2- (CF2 9-CF3) - a cholesteryl radical or a radical derived from cholesterol (for example cholesteryl hexanoate) - an aromatic polycyclic group such as naphthalene or pyrene, - a silicone or alkylsilicone or alkylfluorosilicone radical.

dans laquelle X+ est un proton, un cation de métal alcalin, un cation alcalinoterreux ou l'ion ammonium ; (b) et de # % en moles de motif de formule (1) indiquée ci-dessus. According to a particular embodiment of the invention, the amphiphilic polymers used are polymers, preferably non-crosslinked, consisting of: (a) 1 - # mol% of 2-acrylamido-2-methylpropanesulphonic acid (AMPS) unit of following formula (II):

wherein X + is a proton, an alkali metal cation, an alkaline earth cation or the ammonium ion; (b) and #% by mole of unit of formula (1) indicated above.

The molar grafting rate of the polymers is as indicated above greater than or equal to 35%, and preferably greater than or equal to 40% if m is less than or equal to 15 and if n + p is less than 7; is greater than or equal to 15%, and preferably greater than or equal to 20% if m is less than or equal to 15 and if n + p is greater than or equal to 7; # is greater than or equal to 10%, and preferably greater than or equal to 15% for m greater than 15, regardless of the value of n + p between 0 and 30 or between 1 and 30.

The amphiphilic polymers used according to the invention can be obtained by conventional methods of radical polymerization in the presence of one or more initiators such as, for example, azobisisobutyronitrile (AIBN), azobisdimethylvaleronitrile, hydrochloride of 2,2- azobis- [2-amidinopropane] (ABAH = 2,2-AzoBis- [2-Amidinopropane] Hydrochloride), organic peroxides such as dilauryl peroxide, benzoyl peroxide, tert-butyl hydroperoxide, etc. inorganic peroxidized compounds such as potassium or ammonium persulfate, or H 2 O 2 optionally in the presence of reducing agents.

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The polymers may in particular be obtained by radical polymerization in tert-butanol medium in which they precipitate. By using precipitation polymerization in tert-butanol, it is possible to obtain a particle size distribution of the polymer which is particularly favorable for its uses.

The polymerization reaction may be conducted at a temperature between 0 and 150 C, preferably between 10 and 100 C, either at atmospheric pressure or under reduced pressure. It can also be carried out under an inert atmosphere, and preferably under nitrogen.

According to this process, 2-acrylamido-2-methylpropanesulfonic acid (AMPS) or one of its sodium or ammonium salts, in particular, has been polymerized with an ester of acrylic acid or of methacrylic acid and - C10-C18 alcohol oxyethylenated with 8 moles of ethylene oxide (GENAPOL C-080 from Hoechst / Clariant), - oxo C11 oxyethylenated with 8 moles of ethylene oxide (GENAPOL UD-080 from the company HOECHST / CLARIANT), - oxo alcohol C11 oxyethylenated with 7 moles of ethylene oxide (GENAPOL UD-070 from HOECHST / CLARIANT), - alcohol C12-C14 oxyethylenated by 3 moles of ethylene oxide (GENAPOL LA-030 from the company HOECHST / CLARIANT), - C12-C14 alcohol oxyethylenated with 7 moles of ethylene oxide (GENAPOL LA-070 from the company HOECHST / CLARIANT), - C12-C14 alcohol oxyethylenated with 9 moles of ethylene oxide (GENAPOL LA-090 from the company Hoechst / Clariant), - C12-C14 alcohol oxyethylenated with 11 moles of oxide of ethylene (GENAPOL LA-110 from the company HOECHST / CLARIANT), - C12-C14 alcohol oxyethylenated with 25 moles of ethylene oxide (GENAPOL LA-250 from the company HOECHST / CLARIANT), - alcohol in C16-C18 oxyethylenated with 8 moles of ethylene oxide (GENAPOL T-080 from Hoechst / Clariant), of C16-C18 alcohol oxyethylenated with 15 moles of ethylene oxide (GENAPOL T-150 from HOECHST / CLARIANT), - of C16-C18 alcohol oxyethylenated with 11 moles of ethylene oxide (GENAPOL T-110 from the company HOECHST / CLARIANT), - of C16-C18 alcohol oxyethylenated with 20 moles of ethylene oxide (GENAPOL T-200 from the company HOECHST / CLARIANT), - C16-C18 alcohol oxyethylenated with 25 moles of ethylene oxide (GENAPOL T-250 from HOECHST / CLARIANT), - of C12-C15 alcohol oxyethylenated with 23 moles of ethylene oxide.

According to a preferred embodiment of the invention, the amphiphilic polymer used is uncrosslinked. This non-crosslinked polymer can be, for example, a copolymer of AMPS and of C12-C14 alcohol methacrylate having 7 oxyethylenated groups, obtained from AMPS or a salt of AMPS and Genapol methacrylate LA-070. with a degree of grafting greater than or equal to 15%, or a copolymer of AMPS and C12-C14 alcohol methacrylate having 3 groups

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 oxyethylenated, obtained from AMPS or a salt of AMPS and methacrylate Genapol LA-030, with a degree of grafting greater than or equal to 15%.

The amount of active material of polymer in the final composition may range, for example, from 0.1 to 20% by weight, preferably from 0.3 to 15% by weight and better still from 0.5 to 10% by weight relative to total weight of the composition.

Advantageously, the aqueous phase contains water and optionally one or more compounds that are miscible with water or at least partially miscible with water, such as polyols; C2 to C8 lower monoalcohols, such as ethanol and isopropanol; and C3 to C4 ketones which are liquid at room temperature. By "ambient temperature" is meant a temperature of about 25 ° C at normal atmospheric pressure (760 mmHg).

By "polyol" is meant any organic molecule comprising at least two free hydroxyl groups. Examples of polyols that may be mentioned include glycols such as butylene glycol, propylene glycol, isoprene glycol, glycerol and polyethylene glycols such as PEG-8, sorbitol, sugars such as glucose.

The aqueous phase may also comprise any usual water-soluble or water-dispersible additive as indicated below.

The aqueous phase can represent from 10 to 99.5% by weight, preferably from 20 to 99% by weight, better still from 30 to 98% by weight, more preferably from 40 to 90% by weight and preferably from 40 to 80% by weight. by weight relative to the total weight of the composition.

The water-miscible compound (s), such as polyols and lower alcohols, may be present in an amount ranging from 0 to 30% of the total weight of the composition, in particular from 0.1 to 30% and better still in an amount ranging from 1 to 20%.

Oily phase The nature of the oily phase of the emulsion according to the invention is not critical.

The oily phase is a fatty phase containing at least one fatty substance chosen from liquid oils at room temperature (20-25 ° C.), volatile or not, gums and pasty fatty substances, of animal, vegetable, mineral or synthetic origin. , and their mixtures. These fats are physiologically acceptable.

 The oily phase may also comprise any usual liposoluble or lipodispersible additive as indicated below.

 The oily phase contains at least one oil, more particularly at least one cosmetic oil. The term "oil" means a fatty substance that is liquid at room temperature (25 ° C.).

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As oils that can be used in the composition of the invention, mention may be made, for example, of: hydrocarbon-based oils of animal origin, such as perhydrosqualene; hydrocarbon-based oils of vegetable origin, such as liquid triglycerides of fatty acids containing from 4 to 10 carbon atoms, for instance triglycerides of heptanoic or octanoic acids or, for example, sunflower, corn or soybean oils, squash, grape seed, sesame, hazelnut, apricot, macadamia, arara, coriander, castor oil, avocado, triglycerides of caprylic / capric acids such as those sold by Stearineries Dubois or those sold under the names Miglyol 810,812 and 818 by the company Dynamit Nobel, jojoba oil, shea butter oil; esters and synthetic ethers, in particular of fatty acids, such as the oils of formulas R1COOR2 and R1OR2 in which R1 represents the residue of a fatty acid comprising from 8 to 29 carbon atoms, and R2 represents a hydrocarbon chain, branched or no, containing from 3 to 30 carbon atoms, such as, for example, Purcellin oil, isononyl isononanoate, isopropyl myristate, 2-ethylhexyl palmitate, octyl-2 stearate dodecyl, octyl-2-dodecyl erucate, isostearyl isostearate; hydroxylated esters such as isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, heptanoates, octanoates, decanoates of fatty alcohols; polyol esters, such as propylene glycol dioctanoate, neopentyl glycol diheptanoate and diethylene glycol diisononanoate; and pentaerythritol esters such as pentaerythritol tetraisostearate; linear or branched hydrocarbons of mineral or synthetic origin, such as paraffin oils, volatile or not, and their derivatives, petroleum jelly, polydecenes, isohexadecane, isododecane, hydrogenated polyisobutene such as Parleam oil; partially fluorinated hydrocarbon oils and / or silicone oils such as those described in document JP-A-2-295912; silicone oils such as volatile or non-volatile polymethylsiloxanes (PDMSs) with a linear or cyclic silicone chain, which are liquid or pasty at room temperature, in particular cyclopolydimethylsiloxanes (cyclomethicones) such as cyclohexadimethylsiloxane and cyclopentadimethylsiloxane; polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, during or at the end of the silicone chain, groups having from 2 to 24 carbon atoms; phenyl silicones such as phenyltrimethicones, phenyldimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenyl-dimethicones, diphenylmethyldiphenyltrisiloxanes, 2-phenylethyltrimethylsiloxysilicates, and polymethylphenylsiloxanes; - their mixtures.

According to a preferred embodiment, the composition of the invention comprises at least one oil chosen from silicone oils, linear or branched hydrocarbons, ethers and synthetic esters, and mixtures thereof.

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 The other fatty substances that may be present in the oily phase are, for example, fatty acids containing from 8 to 30 carbon atoms, such as stearic acid, lauric acid and palmitic acid; waxes; gums such as silicone gums (dimethiconol); silicone resins such as trifluoromethyl-C1-4-alkyldimethicone and trifluoropropyldimethicone, and silicone elastomers such as the products sold under the names "KSG" by the company Shin-Etsu, under the name "Trefil" by Dow Corning or under the names "Gransil" by the company Grant Industries, and mixtures thereof.

These fatty substances may be chosen in a varied manner by those skilled in the art in order to prepare a composition having the desired properties, for example of consistency or texture.

The amount of oily phase in the composition of the invention may range from 0.5 to 90% by weight, preferably from 1 to 80% by weight, better still from 2 to 70% by weight, and still more preferably from 10 to 60% by weight. by weight and preferably from 20 to 60% by weight relative to the total weight of the composition. The amount of oil (s) in the composition is preferably at least 0.5% by weight relative to the total weight of the composition and preferably at least 2% by weight relative to the total weight of the composition. composition. A small amount of oily phase makes it possible to obtain very fluid light emulsions, which can in particular constitute lotions.

Additives In known manner, the composition for topical application of the invention may also contain one or more adjuvants usual in the cosmetic or dermatological field. As adjuvants, mention may be made of gelling agents, active agents, preservatives, antioxidants, perfumes, solvents, fillers, sunscreens (= UV filters), dyestuffs, basic agents (triethanolamine, diethanolamine, hydroxide sodium) or acids (citric acid), and also lipid vesicles or any other type of vector (nanocapsules, microcapsules, etc.), and mixtures thereof. These adjuvants are used in the usual proportions in the cosmetics field, and for example from 0.01 to 30% of the total weight of the composition, and they are, according to their nature, introduced into the aqueous phase of the composition or into the phase oily, or in vesicles or any other type of vector. These adjuvants and their concentrations must be such that they do not modify the property desired for the emulsion of the invention.

Depending on the fluidity of the composition that it is desired to obtain, it is possible to incorporate in the composition one or more gelling agents, in particular hydrophilic, that is to say soluble or dispersible in water. As hydrophilic gelling agents, mention may be made, for example, of modified or unmodified carboxyvinyl polymers, such as the products sold under the names Carbopol (INCI name: carbomer) and Pemulen (INCI name: Acrylates / C10-30 akyl acrylate crosspolymer) by the company Noveon ; polyacrylamides; polymers and copolymers of 2acrylamido-2-methylpropanesulphonic acid, optionally crosslinked and / or

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 neutralized, such as poly (2-acrylamido-2-methylpropanesulphonic acid) marketed by Hoechst under the name Hostacerin AMPS (INCI name: ammonium polyacryldimethyltauramide); crosslinked anionic copolymers of acrylamide and of AMPS, in the form of an W / O emulsion, such as those marketed under the name SEPIGEL 305 (CTFA name: Polyacrylamide / C13-14 Isoparaffin / Laureth-7) and under the name SIMULGEL 600 (CTFA name: Acrylamide / Sodium acryloyldimethyltaurate copolymer / Isohexadecane / Polysorbate 80) by the company SEPPIC; polysaccharide biopolymers such as guar gum, alginates, modified or unmodified celluloses; and their mixtures. When they are present, these gelling agents must be introduced in such a quantity that they do not modify the properties of the composition according to the invention, in particular its fluidity.

As fillers which can be used in the composition of the invention, mention may be made, for example, of pigments such as titanium oxide, zinc oxide or iron oxide and organic pigments; kaolin; silica; talcum; boron nitride; organic spherical powders, fibers, and mixtures thereof. As organic spherical powders, mention may be made, for example, of polyamide powders and in particular nylon powders such as nylon-1 or polyamide-12, sold under the names ORGASOL by the company Atochem; polyethylene powders; Teflon; microspheres based on acrylic copolymers, such as those made of ethylene glycol dimethacrylate / lauryl methacrylate copolymer sold by Dow Corning under the name Polytrap; expanded powders such as hollow microspheres and in particular the microspheres sold under the name Expancel by the company Kemanord Plast or under the name Micropearl F 80 ED by the company Matsumoto; silicone resin microbeads such as those sold under the name Tospearl by the company Toshiba Silicone; polymethyl methacrylate microspheres, sold under the name MICROSPHERE M-100 by the company Matsumoto or under the name COVABEAD LH85 by the company Wackherr; ethylene-acrylate copolymer powders, such as those sold under the name FLOBEADS by Sumitomo Seika Chemicals; powders of natural organic materials such as starch powders, especially corn starch, wheat or rice, crosslinked or otherwise, such as starch powders crosslinked with octenylsuccinate anhydride, sold under the name DRY -FLO by the company National Starch. As fibers, mention may be made, for example, of polyamide fibers, such as, in particular, nylon 6 (or polyamide 6) (INCI name: nylon 6), nylon 6,6 (or polyamide 66) fibers (INCI name: nylon 66 ), or poly-p-phenylene terephtamide fibers; and their mixtures. These fillers may be present in amounts ranging from 0 to 20% by weight and preferably from 0.5 to 10% by weight relative to the total weight of the composition.

As active agents that can be used in the composition of the invention, mention may be made, for example, of enzymes (for example lactoperoxidase, lipase, protease, phospholipase, cellulases); flavonoids; moisturizing agents such as protein hydrolysates; sodium hyaluronate; polyols like the

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 glycerine, glycols such as polyethylene glycols, and sugar derivatives; anti-inflammatories; procyannidol oligomers; vitamins such as vitamin A (retinol), vitamin E (tocopherol), vitamin C (ascorbic acid), vitamin B5 (panthenol), vitamin B3 (niacinamide), derivatives of these vitamins (especially esters) and their mixtures; urea; caffeine; depigmenting agents such as kojic acid, hydroquinone and caffeic acid; salicylic acid and its derivatives; alpha-hydroxy acids such as lactic acid and glycolic acid and their derivatives; retinoids such as carotenoids and vitamin A derivatives; hydrocortisone; melatonin; extracts of algae, mushrooms, vegetables, yeasts, bacteria; steroids; anti-bacterial active agents such as 2,4,4'-trichloro-2'-hydroxy diphenyl ether (or triclosan), 3,4,4'-trichlorocarbanilide (or triclocarban) and the acids indicated above, and in particular the salicylic acid and its derivatives; tensors; ceramides; essential oils ; and their mixtures; and any suitable asset for the ultimate purpose of the composition.

As examples of steroids, mention may be made of dehydroepiandrosterone (or DHEA), as well as (1) its precursors and biological derivatives, in particular salts and esters of DHEA, such as DHEA sulfate and salicylate, 7-hydroxy-DHEA. 7-keto DHEA, 7-hydroxy and 7-keto DHEA esters, especially 3beta-acetoxy-7-oxo DHEA, and (2) its precursors and chemical derivatives, in particular sapogenins such as diosgenin or hecogenin, and / or their derivatives such as hecogenin acetate, and / or natural extracts containing it and in particular extracts of Dioscoreas, such as wild yam (Wild Yam).

U.V. filters can be organic or inorganic (or physical U.V. filters).

They may be present in an amount of active material ranging from 0.01% to 20% by weight of active material, preferably from 0.1% to 15% by weight, and more preferably from 0.2% to
10% by weight relative to the total weight of the composition.

Examples of organic screening agents that are active in the UV-A and / or UV-B range that can be added to the composition of the invention include, for example, derivatives with a sulfonic function such as sulphonated derivatives or sulphonated benzylidene camphor, benzophenone or phenylbenzimidazole, more particularly benzylidene camphor derivatives, such as benzene 1,4 [di (3-methylidene-campho-10-sulphonic acid)], (INCI name: Terephthalylidene Dicamphor Sulfonic Acid) ) manufactured under the name MEXORYL SX by the company CHIMEX. 4'-sulpho-3-benzylidenecamphoric acid (INCI name: Benzylidene Camphor Sulfonic Acid), manufactured under the name MEXORYL SL by the company CHIMEX, 2- [4- (camphomethylidene) phenyl] benzimidazole-5-sulphonic acid, phenylbenzimidazole sulfonic acid (INCI name: Phenylbenzimidazole Sulfonic Acid), sold under the name Eusolex 232 by the company Merck; para-aminobenzoic acid derivatives; salicylic derivatives such as ethyl hexyl salicylate sold under the trade name NEO HELIOPAN OS by
Haarmann and Reimer; dibenzoylmethane derivatives such as Butyl
Methoxydibenzoylmethane sold in particular under the trade name PARSOL
1789 by Hoffmann La Roche; cinnamic derivatives such as ethylhexyl
Methoxycinnamate sold in particular under the trade name PARSOL MCX by

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 Hoffmann La Roche; derivatives of ss, ss'-diphenylacrylate such as octocrylene (acyano-ss, ss-diphenylacrylate of 2-ethylhexyl) sold under the trade name UVINUL N539 by the company BASF; benzophenone derivatives such as Benzophenone-1 sold under the trade name UVINUL 400 by BASF, Benzophenone-2 sold under the trade name UVINUL D50 by BASF, Benzophenone-3 or Oxybenzone, sold under the trade name UVINUL M40 by BASF, Benzophenone-4 sold under the trade name UVINUL MS40 by BASF; benzylidene camphor derivatives such as 4-methylbenzylidene camphor sold under the trade name Eusolex 6300 by Merck; phenyl benzimidazole derivatives such as Benzimidazilate sold under the trade name NEO HELIOPAN AP by Haarmann and Reimer; derivatives of triazine such as Anisotriazine sold under the trade name Tinosorb S by CIBA GEIGY and ethylhexyl triazone sold in particular under the trade name Uvinul T150 by BASF; phenyl benzotriazole derivatives such as Drometrizole Trisiloxane sold under the trade name SILATRIZOLE by Rhodia Chimie, and Methylene bis-Benzotriazolyl Tetramethylbutylphenol, sold in solid form under the trade name MIXXIM BB / 100 by Fairmount Chemical or in micronized form in aqueous dispersion under the name trade name TINOSORB M by Ciba Specialty Chemicals; anthranilic derivatives such as Menthyl anthranilate sold under the trade name NEO HELIOPAN MA by Haarmann and Reimer; imidazoline derivatives; benzalmalonate derivatives; and their mixtures.

As physical filters which may be added in the composition of the invention, mention may be made, for example, of pigments and nano-pigments of metal oxides, coated or uncoated, in particular the oxides of titanium, iron, zirconium, zinc or cerium, and mixtures thereof, these oxides possibly being in the form of micro- or nanoparticles (nanopigments), optionally coated.

The compositions of the invention are prepared according to the usual methods for preparing O / W emulsions. The amphiphilic AMPS copolymer is solubilized with stirring in the aqueous phase, preferably at room temperature (25 ° C.), and the emulsion is prepared by introducing the oily phase into the aqueous phase with stirring. According to a preferred embodiment of the invention, the emulsion obtained is then refined using a homogenizer under pressure, preferably under a pressure greater than 300 bar, and for example from 300 to 600 bar, especially in a device Rannie type, the emulsion can be passed for example from one to six times in this homogenizer.

 The compositions according to the invention may for example be in the form of serum or milk and are prepared according to the usual methods. They have the advantage of being vaporizable, which means that they are fluid enough to be applied by means of a vaporizer, which is free of propellant gas, is provided with a pump-type pump spray, operates at the atmospheric pressure and delivers the composition in the form of fine droplets.

<Desc / Clms Page number 15>

 The composition of the invention is intended for topical application and may in particular constitute a dermatological or cosmetic composition, for example intended for the care, treatment, cleansing and makeup of keratin materials and in particular of the skin, lips, hair , eyelashes and nails of human beings.

According to a preferred embodiment of the invention, the composition constitutes a cosmetic composition and is intended for topical application to the skin.

The compositions, objects of the invention, find their application in particular in a large number of cosmetic treatments of the skin, lips and hair, including the scalp, especially for the care, removal of makeup, cleansing and / or perfuming the skin, lips and / or hair.

The compositions according to the invention may more particularly be used as skin care and / or cleansing products, as scented products for the skin.

Also, the invention also relates to the cosmetic use of a cosmetic composition as defined above for the care, removal of make-up, cleaning and / or perfuming of the skin, lips and / or hair.

Finally, the subject of the invention is a process for the cosmetic treatment of the skin, including the scalp, the hair, and / or the lips, characterized by the fact that it is applied to the skin, the hair and / or the lips a cosmetic composition as defined above.

As they have a suitable fluidity, the compositions according to the invention can also be used for the impregnation of substrates insoluble in water to form articles (such as wipes) for the care, cleaning and / or removal of make-up of the skin , eyelashes and / or lips. The water insoluble substrate may comprise one or more layers and may be selected from the group consisting of woven materials, nonwoven materials, foams, sponges, wadding, sheets, balls or films. It may be in particular a non-woven substrate based on fibers of natural origin (flax, wool, cotton, silk) or of synthetic origin (cellulose derivatives, viscose, polyvinyl derivatives, polyesters such as polyethylene terephthalate, polyolefins such as polyethylene or polypropylene, polyamides such as nylon, acrylic derivatives). Nonwovens are generally described in RIEDEL Nonwoven Bonding Methods & Materials, Nonwoven World (1987). These substrates are obtained according to the usual methods of the technique for preparing nonwovens.

When the substrate is a non-woven material, a thick, non-woven, non-woven fabric is preferably used which is strong enough not to disintegrate and not fluff on application to the skin. It must be absorbent, soft at least on one side for makeup removing eyes in particular. Suitable nonwovens include, for example, those marketed under the

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 names Ultraloft 15285-01, Ultraloft 182-008, Ultraloft 182-010, Ultraloft 182-016 by the company BBA, Vilmed M1519 Blau, Vilmed M 1550 N and 112-132-3 by the company Freudenberg, the one marketed under the name Norafin 11601-010B by Jacob Holm Industries, non-woven flocked marketed under the names Univel 109 and Univel 119 by the company Uni Flockage.

Furthermore, this substrate may comprise one or more layers having identical or different properties and have elasticity, softness and other properties appropriate to the desired use. The substrates may comprise for example two parts having different elastic properties as described in WO-A-99/13861 or comprise a single layer with different densities as described in document WO-A-99/25318 or comprise two layers of different textures as described in WO-A-98/18441.

The compositions impregnated on the substrate may contain any suitable compound for the intended purpose, for example foaming surfactants for obtaining cleaning wipes, or care actives for obtaining skin care wipes.

The invention therefore also relates to an article obtained by impregnation of a water-insoluble substrate with a composition as defined above.

The invention also relates to the use of the composition as defined above for the preparation of an article for the care, removing make-up and / or cleaning of the skin, lips and / or eyelashes.

The examples which follow will make it possible to better understand the invention, without however being limiting in nature. The quantities indicated are in% by weight, unless otherwise indicated.

Examples I. Amps Amphiphilic Copolymer Water Solutions The following table summarizes the viscosities and absorbances of aqueous solutions comprising 1% by weight of various AMPS amphiphilic copolymers.

Solution Preparation Method: An aqueous amphiphilic AMPS polymer solution is prepared by simply dissolving the appropriate amount of polymer in powder form in deionized water with stirring at room temperature for 24 hours.

Viscosity measurement protocol: The viscosity measurements are carried out using an RS 150 (Haake) type constrained-stress rheometer, equipped with a cone / plane measurement geometry of 2.5 cm. C. The sample is subjected to a shear rate ranging from 0.03 S-1 to 200 S-1 for 125 seconds; the

<Desc / Clms Page number 17>

 measured magnitude is the stress to be applied on the sample to achieve the desired shear rate; the viscosity of the sample is then calculated as the ratio of the stress applied to the shear rate.

The viscosities reported in the table below correspond to the values obtained for a shear rate equal to 1 S-1. A fluid composition can only be obtained if these values are less than 1 Pa.s.

Absorbance measurement protocol: the absorbance of the solutions is measured using a Cary 300 spectrophotometer (Varian), at 25 ° C., for a wavelength equal to 500 nm, using vessels 1 cm thick.

<Tb>
<Tb>

<SEP> Chains <SEP> Viscosity <SEP> Absorbance
<tb> Name <SEP> of <SEP> strings <SEP><SEP> value of <SEP><SEP> value of <SEP> n <SEP> Proportion <SEP> (Pa. <SEP> s) <SEP> at <SEP> 500 <SEP> nm
<tb> hanging <SEP> m <SEP> in <SEP> in <SEP><SEP> molar <SEP>#<SEP> to <SEP> 1 <SEP> s- <SEP> to <SEP> 1 <SEP>% <SEP> in <SEP>
<tb> CmH2m + 1 <SEP> group <SEP> (% <SEP> in <SEP> to <SEP> 1 <SEP>% <SEP> in <SEP> weight
<tb> (OE) <SEP> mole) <SEP> weight
<tb> Genapol <SEP> LA-030 <SEP> 12 <SEP> - <SEP> 14 <SEP> 3 <SEP> 27 <SEP> 8 <SEP> 0.293 <SEP>
<tb> Genapol <SEP> LA-030 <SEP> 12 <SEP> - <SEP> 14 <SEP> 3 <SEP> 45 <SEP> 0.08 <SEP> 0.900
<tb> Genapol <SEP> LA-070 <SEP> 12 <SEP> - <SEP> 14 <SEP> 7 <SEP> 8.5 <SEP> 0.075 <SEP> 0.002
<tb> Genapol <SEP> LA-070 <SEP> 12-14 <SEP> 7 <SEP> 19 <SEP> 0.18 <SEP> 0, <SEP> 008 <SEP>
<tb> Genapol <SEP> LA-070 <SEP> 12 <SEP> - <SEP> 14 <SEP> 7 <SEP> 34 <SEP> 0.9 <SEP> 0.002
<tb> Genapol <SEP> LA-070 <SEP> 12 <SEP> - <SEP> 14 <SEP> 7 <SEP> 58 <SEP> 0.002 <SEP> 0.003
<tb> Alcohol <SEP> in <SEP> C12-C15 <SEP> 12 <SEP> - <SEP> 15 <SEP> 23 <SEP> 10.5 <SEP> 0.008 <SEP> 0.003
<tb> oxyethylenated <SEP> by
<tb> 23 <SEP> oxide moles <SEP>
<tb> ethylene
<tb> Alcohol <SEP> in <SEP> C12-C15 <SEP> 12 <SEP> - <SEP> 15 <SEP> 23 <SEP> 21 <SEP> 0.003 <SEP> 0.008
<tb> oxyethylenated <SEP> by
<tb> 23 <SEP> oxide moles <SEP>
<tb> ethylene
<tb> Alcohol <SEP> in <SEP> C12-C15 <SEP> 12 <SEP> - <SEP> 15 <SEP> 23 <SEP> 42 <SEP> 0.002 <SEP> 0.003 <SEP>
<tb> oxyethylenated <SEP> by
<tb> 23 <SEP> oxide moles <SEP>
<tb> ethylene
<tb> Genapol <SEP> T-080 <SEP> 16-18 <SEP> 8 <SEP> 3.5 <SEP> 3 <SEP> 0.062
<tb> Genapol <SEP> T-080 <SEP> 16 <SEP> - <SEP> 18 <SEP> 8 <SEP> 7.5 <SEP> 18 <SEP> 0.070
<tb> Genapol <SEP> T-250 <SEP> 16 <SEP> - <SEP> 18 <SEP> 25 <SEP> 3.5 <SEP> 30 <SEP> 0.051
<tb> Genapol <SEP> T-200 <SEP> 16 <SEP> - <SEP> 18 <SEP> 20 <SEP> 20.5 <SEP> 0.012 <SEP> 0.004
<tb> * Genapol <SEP> LA-250 <SEP> 12-14 <SEP> 25 <SEP> 19 <SEP> 0.015 <SEP> 0.001
<tb> * Crosslinked <SEP> Copolymer
<Tb>

<Desc / Clms Page number 18>

 These results show that: - For m equal to 12-14 and n equal to 3, the polymer comprising 27 mol% of side chains present in 1% aqueous solution, a high viscosity while the 1% solution of the polymer comprising 45 mol% of side chains is relatively fluid.

- For m equal to 12-14 or 12-15 and n greater than or equal to 7, the copolymers lead to 1% fluid aqueous solutions, regardless of their level of side chains. However, this condition is necessary but not sufficient to achieve the object of the invention, and the degree of grafting must be in this case at least 15% to obtain a fluid composition as shown below in Comparative Example 1.

For m = 16-18 and n = 8.20 or 25, the copolymers comprising less than 10 mol% of side chains lead to aqueous solutions at 1% of high viscosity, whereas the copolymer solutions comprising more than 10 mol% of side chains are fluid.

II. Examples of compositions Example 1 according to the invention: Oily phase lotion: Cyclohexadimethylsiloxane 8% Parléam oil 12% Aqueous phase; Copolymer of AMPS and Genapol methacrylate LA-070 (*) (with 58 mol% of monomer B) 2.5% Sodium hydroxide (1 M) 0.375% Glycerin 3% Preservatives 1% Water qs 100% (* Amps amphiphilic polymer comprising 58 mol% of C12-14 side chain side chains (EO) 7, Procedure: The amphiphilic AMPS copolymer is solubilized for 2 hours with stirring in the aqueous phase at 25 ° C; the resulting solution is macroscopically homogeneous. The emulsion is prepared by slow introduction of the oily phase in the aqueous phase with stirring using a Moritz-type homogenizer under a stirring speed of 2000 RPM for 5 minutes, and then the emulsion is refined to the desired temperature. using a Rannie type homogenizer under a pressure of 500 bar (5 passes).

 The composition is in the form of a lotion (very fluid milk) (pH-7.2).

 The average number of oil globules is 257 nm. The viscosity of the tonic, measured with Rheomat 180 at 25 ° C. at a shear rate of 200

<Desc / Clms Page number 19>

 S-1 at the mobile 1 is 0.008 Pa. S. After 2 months at 45 ° C, the average size of the oil globules is 283 nm, and the emulsion is macroscopically stable.

Example 2 According to the Invention: Oily Phase Lotion: Cyclohexadimethylsiloxane 8% Parléam Oil 12% Aqueous phase; Copolymer of AMPS and Genapol methacrylate LA-070 (*) (with 34 mol% of monomer B) 2.5% Sodium hydroxide (1 M) 0.4% Glycerin 3% Preservatives 1% Water qs 100% (*) AMPS amphiphilic polymer comprising 34 mol% of side chain side chains C12-14 (EO) 7.

Procedure: identical to that of Example 1.

The composition is in the form of a lotion (very fluid milk) (pH-7.3).

The average number size of the oil globules is 284 nm. The viscosity of the tonic, measured at Rheomat 180 at 25 ° C. at a shear rate of 200 s -1 at the mobile 1 is 0.023 Pa · s. After 2 months at 45 ° C., the average size of the oil globules is 290 nm, and the emulsion is macroscopically stable.

Comparative Examples: Comparative Example 1: Oily Phase: Cyclohexadimethylsiloxane 8% Parléam Oil 12% Aqueous phase; Copolymer of AMPS and Genapol methacrylate LA-070 (*) (with 8.5 mol% of monomer B) 2.5%
Sodium hydroxide (1 M) 0.5%
Glycerin 3% Triethanolamine 10% in water 0.06%
Conservatives 1%
Water qs 100% (*) AMPS amphiphilic polymer comprising 8.5 mol% of side chain side chains C12-14 (EO) 7.

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 Procedure: The amphiphilic AMPS copolymer is solubilized for 2 hours with stirring in the aqueous phase at 25 ° C .; the resulting solution is macroscopically homogeneous. The emulsion is prepared by slow introduction of the oily phase in the aqueous phase with stirring using a Moritz-type homogenizer under a stirring speed of 2000 RPM for 5 minutes, and then the emulsion is refined to the desired temperature. using a Rannie type homogenizer under a pressure of 500 bar (5 passes).

The composition is in the form of a cream (pH-6.9). The average number of oil globules is 685 nm. The viscosity of the cream, measured at Rheomat 180 at 25 ° C. at a shear rate of 200 S-1 at the mobile 3 is 1.5 Pa · s. The AMPS-methacrylate copolymer of Genapol LA-070 at 8.5 mol% of monomer (B) gives a thickened composition and does not make it possible to obtain a fluid composition according to the invention.

Comparative Example 2: Oily phase: Cyclohexadimethylsiloxane 8% Parléam oil 12% Aqueous phase: Copolymer of AMPS and Genapol methacrylate T-080 (*) (with 7.5 mol% of monomer B) 1.75% Hydroxide Sodium (1M) 0.5% Glycerin 3% Preservatives 1% Water qs 100% (*) AMPS amphiphilic polymer comprising 7.5 mol%, side chains C16-18 (EO) 8 Procedure: The AMPS amphiphilic copolymer is solubilized for 2 hours with stirring in the aqueous phase at 25 ° C; the resulting solution is macroscopically homogeneous. The emulsion is prepared by slow introduction of the oily phase into the aqueous phase with stirring using a Moritz type homogenizer under a stirring speed of 2000 RPM for 15 minutes.

The composition is in the form of a cream (pH-7.1). The average size in number of oil globules is 5 m. The viscosity of the cream, measured at Rheomat 180 at 25 ° C. at a shear rate of 200 S-1 at the mobile 3 is 2.1 Pa · s. The copolymer of AMPS and methacrylate Genapol T-080 7.5 mole% monomer (B) leads to a thickened composition and does not provide a fluid composition according to the invention.

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Comparative Example 3: Oily Phase: Cyclohexadimethylsiloxane 6% Parleamam Oil 9 Aqueous phase; Copolymer of AMPS and Genapol methacrylate LA-070 (*) (with 8.5 mol% of monomer B) 1.75% Triethanolamine 10% in water 0.06% Preservatives 0.5% Water qs 100% (*) AMPS amphiphilic polymer comprising 8.5 mol% of side chain side chains C12-14 (EO) 7.

Procedure: The amphiphilic AMPS copolymer is solubilized for 2 hours with stirring in the aqueous phase at 25 ° C .; the resulting solution is macroscopically homogeneous. The emulsion is prepared by slow introduction of the oily phase into the aqueous phase with stirring using a Moritz type homogenizer under a stirring speed of 2000 RPM for 15 minutes.

The composition is in the form of a cream (pH-7.0). The average number of oil globules is 2.6 m. The viscosity of the cream, measured at Rheomat 180 at 25 ° C. at a shear rate of 200 S-1 at the mobile 3 is 1.95 Pa · s. The AMPS-methacrylate copolymer of Genapol LA-070 at 8.5 mol% of monomer (B) gives a thickened composition and does not make it possible to obtain a fluid composition according to the invention.

Claims (21)

 1. A composition for topical application, in the form of an oil-in-water emulsion comprising an oily phase dispersed in an aqueous phase, characterized in that it contains at least one amphiphilic polymer that can be obtained from one or more α, β-ethylenically unsaturated monomers (A) containing an atom selected from oxygen, nitrogen, sulfur, phosphorus, chlorine, fluorine and mixtures thereof, and one or more monomers hydrophobic material (B) containing (i) an ethylenically unsaturated terminal group, (ii) a hydrophilic portion of the formula - (CH2CH2O) n- (CH2CH (CH3) O) p wherein n and p, independently of one another, denote an integer ranging from 0 to 30, with the proviso that n + p is less than or equal to 30, and (iii) a linear or branched, linear or branched aliphatic or cycloaliphatic CmH2m + 1 hydrophobic moiety, where m is an integer ranging from from 6 to 30; the polymer being such that the molar proportion (#) of hydrophobic monomer (B) relative to the total amount of moles of monomers (A and B) is (1) greater than or equal to 35% when m is less than or equal to And that n + p is less than 7, (2) greater than or equal to 15% when m is less than or equal to 15 and n + p is greater than or equal to 7, (3) greater than or equal to 10% when m is greater than 15. 2. Composition according to claim 1, characterized in that n + p is an integer equal to or greater than 1. 3. Composition according to claim 1 or 2, characterized in that it is free of surfactant. 4. Composition according to any one of the preceding claims, characterized in that it has a viscosity ranging from 0.001 to 1 Pa.s, measured at 25 C, Rheomat 180, at a shear rate of 200 S-1. 5. Composition according to any one of the preceding claims, characterized in that the polymer in an aqueous solution at a concentration of 1% by weight has a viscosity of less than 1 Pa · s for a shear rate equal to 1 S-1. , the viscosity being measured at 25. 6. Composition according to any one of the preceding claims, characterized in that the monomer A is chosen from vinylsulfonic acid, styrene sulphonic acid, (meth) acrylamido (C1-C22) alkylsulphonic acids, and their forms. partially or totally neutralized, and their mixtures. 7. Composition according to any one of the preceding claims, characterized in that the monomer A is chosen from acrylamido-methanesulfonic acid, acrylamido-ethanesulfonic acid, acrylamido-propanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-methacrylamido-2-methylpropanesulfonic acid, 2-acrylamido-n-butanesulfonic acid, 2acrylamido-2,4,4-trimethylpentanesulfonic acid and their forms

 trti)! QrrtQrt nii Ini'Iomcni no "tl" ", liC'6.oC '0+ 10,' 1" 't'Y'16.I ", nno.,. <Desc / Clms Page number 23> 8. Composition according to claim 6 or 7, characterized in that the monomer A is 2-acrylamido-2-methylpropanesulfonic acid (AMPS), and its partially or completely neutralized forms. 9. Composition according to any one of the preceding claims, characterized in that the ethylenically unsaturated terminal group of the hydrophobic monomer B is selected from acrylic acid, methacrylic acid, acrylamide, methacrylamide, and mixtures thereof. 10. Composition according to any one of the preceding claims, characterized in that the hydrophobic part CmH2m + 1 is chosen from hexyl, octyl, decyl, dodecyl, hexadecyl, octadecyl, tetradecyl, oleyl, isostearic, cyclododecane and adamantane. 11. Composition according to any one of the preceding claims, characterized in that the hydrophobic monomer (B) is preferably chosen from the acrylates of formula (I) below:

 wherein n and p, independently of one another, denote an integer from 0 to 30 with the proviso that n + p is less than or equal to 30; R1 denotes a hydrogen atom or a linear or branched C1-C6 alkyl radical; and R denotes the radical CmH2m + 1 as defined in claim 1. 12. Composition according to the preceding claim, characterized in that the polymer consists of: (a) 1 - T mole% of 2-acrylamido-2-methylpropanesulfonic acid unit of formula (II):

<Desc / Clms Page number 24>  wherein X + is a proton, an alkali metal cation, an alkaline earth cation or the ammonium ion; (b) and # mol% of unit of formula (1). 13. Composition according to any one of the preceding claims, characterized in that the polymer is uncrosslinked. 14. Composition according to any one of the preceding claims, characterized in that the amount of polymer ranges from 0.1 to 20% by weight relative to the total weight of the composition. 15. Composition according to any one of the preceding claims, characterized in that the oily phase represents from 0.5% to 90% and preferably from 1 to 80% by weight relative to the total weight of the composition. 16. Composition according to any one of the preceding claims, characterized in that it is refined using a homogenizer under pressure. 17. Composition according to any one of the preceding claims, characterized in that it constitutes a cosmetic or dermatological composition. 18. Cosmetic use of a cosmetic composition according to any one of claims 1 to 16 for the care, removal of makeup, cleaning and / or perfuming the skin, lips and / or hair. 19. Article obtained by impregnation of a water-insoluble substrate, with a composition according to any one of claims 1 to 16. 20. Use of the composition according to any one of claims 1 to 16, for the preparation of an article for care, removing make-up and / or cleaning the skin, lips and / or eyelashes. 21. Process for the cosmetic treatment of the skin, the hair, and / or the lips, characterized in that a cosmetic composition according to any one of Claims 1 is applied to the skin, the hair and / or the lips. at 16.