FR2966354A1 - Cosmetic composition, useful to treat human keratin fibers such as hair, comprises alkoxysilane compounds having fatty chain e.g. octyltriethoxysilane and one or more organic or inorganic acid e.g. acetic acid, lactic acid and citric acid - Google Patents

Abstract

Cosmetic composition comprises alkoxysilane compounds having one or more fatty chain (I); and one or more organic or inorganic acid. Cosmetic composition comprises: one or more alkoxysilane compounds having one or more fatty chain of formula (R1Si(OR2) 3) (I); and one or more organic or inorganic acid. R1 : 7-18C alkyl or 7-18C alkenyl group; and R2 : 1-6C alkyl group, preferably ethyl. An independent claim is included for process for the cosmetic treatment of keratin material, preferably human keratin fiber such as hair, comprising applying a composition to the hair, and optionally rinsing after possible exposure time, in presence or absence of heat.

Description

B 10-2763 1 Cosmetic composition comprising a fatty-chain alkoxysilane and an organic or mineral acid

The present invention relates to a cosmetic composition, comprising one or more fatty-chain alkoxysilanes and one or more organic or inorganic acids. The subject of the present invention is also the use of said composition for the cosmetic treatment of keratinous fibers, such as human keratinous fibers and in particular the hair, as well as a process for the cosmetic treatment of keratinous fibers with the aid of such a composition. In the field of hair cosmetics, it is customary to treat keratinous fibers subjected to various external aggressions. Indeed, these fibers can undergo assaults of various origins, such as mechanical aggression, for example related to disentangling or blow drying, or chemical aggression, for example following a coloring or a permanent. These attacks have repercussions on the qualities of the keratinous fiber and can induce a difficult disentangling at the time of washing the hair, on dry and / or wet hair, as well as a degradation of the surface properties of the fibers, said surface becoming non-smooth, dry and irregular, especially when the hair is dry.

There are care products that can limit these phenomena. However, these solutions, not always effective enough, are not sufficiently remanent to shampoos. The compositions of the prior art which make it possible to facilitate disentangling by softening the keratin fiber and which bring shine, softness and regularity to the dried hair essentially comprise cationic surfactants, fats, silicones and cationic polymers. After being applied, these compositions are rinsed and the cosmetic conditioning agents, which are only slightly deposited on the keratinous fibers, are generally removed at the time of the following washing. Thus, the application of these compositions must be renewed after each wash, to treat the hair and facilitate their conditioning. There is therefore a need for compositions which can form a material or to penetrate care actives homogeneously on and / or in the keratinous fibers, and this in a manner that is resistant to several shampoos.

International patent application WO 2004/012691 discloses the cosmetic use of silanes for improving the condition of the hair. The patent application EP 0 159 628 proposes compositions for strengthening the elasticity of the hair, comprising an alkyltrialkoxysilane. Furthermore, patent application EP 1 736 139 describes a hair treatment composition comprising an alkoxysilane, an organic acid and water, the pH of the composition being between 2 and 5.

Finally, patent application EP 0 877 027 discloses a composition comprising an organosilane and a particular polyol. The Applicant has now discovered that, surprisingly, the combination of a particular fatty-chain alkoxysilane with at least one organic or inorganic acid makes it possible to treat the hair in an effective and long-lasting manner, and thus to facilitate their conditioning. In particular, such a composition makes it possible, on the one hand, to confer good cosmetic properties on the hair and, on the other hand, to provide residual cosmetic effects to several shampoos. The subject of the present invention is therefore a cosmetic composition comprising: one or more fatty-chain alkoxysilanes of the following formula (I): ## STR2 ##

wherein R1 represents a linear or branched alkyl or alkenyl group comprising from 7 to 18 carbon atoms, and Rz represents a linear or branched alkyl group comprising from 1 to 6 carbon atoms, and - one or more organic acids or minerals. This particular combination has proved particularly suitable for hair care and has also made it possible to obtain very good use qualities such as particularly easy application and good rinsability. The composition according to the invention provides the hair with excellent cosmetic properties, and in particular promotes detangling, suppleness and smoothing of the hair.

In addition, the feel of the hair after treatment with the composition according to the invention is particularly pleasant. Finally, the conditioning properties obtained by means of the composition according to the invention are remanent to shampoos. Another subject of the invention consists of a process for the cosmetic treatment of hair using a composition according to the invention. In particular, the composition according to the invention may be rinsed or not, applied under the effect of heat or not, and associated or not with chemical and / or mechanical treatments of the hair.

The subject of the invention is also the use of the composition according to the invention for the cosmetic treatment of the hair. Other objects, features, aspects and advantages of the invention will emerge even more clearly on reading the description and the example which follows.

According to the invention, the composition comprises one or more fatty-chain alkoxysilanes and one or more organic or inorganic acids.

The fatty-chain alkoxysilane (s) which may be used in the composition according to the invention are those corresponding to the following formula (I): ## STR1 ## in which R 1 represents an alkyl or alkenyl group , linear or branched, comprising from 7 to 18 carbon atoms, and Rz represents a linear or branched alkyl group comprising from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms and even more preferably the ethyl group. Where R 1 is an alkyl or alkenyl group and R 2 is an alkyl group, they include only carbon and hydrogen atoms. Preferably Rz denotes a linear alkyl group comprising 1 to 4 carbon atoms, more preferably a linear alkyl group comprising 1 to 4 carbon atoms, and more preferably the ethyl group. Preferably, R 1 denotes an alkyl group, and even more preferably a linear alkyl group. Preferably, the fatty-chain alkoxysilane is selected from octyltriethoxysilane, dodecyltriethoxysilane, octadecyltriethoxysilane and hexadecyltriethoxysilane. More particularly, the fatty-chain alkoxysilane according to the invention is octyltriethoxysilane (OTES). The alkoxysilane (s) of formula (I) are present in the composition according to the invention in preferential proportions of at least 0.1% by weight, preferably ranging from 0.1 to 20% by weight, more preferably from 0.5 to 18% by weight, better still 2 to 15% by weight, relative to the total weight of the composition. The composition according to the invention also comprises one or more organic or inorganic acids. For the purposes of the invention, the term "organic acid" is intended to mean any non-polymeric organic compound comprising two or more carbon atoms and one or more acid functional groups chosen from carboxylic acid, sulphonic acid and phosphoric acid functions. . Preferably, the organic acid is not a surfactant. Even more preferentially, the molecular weight of the organic acid is less than 250, better still less than 200. Even more preferentially, the organic acids according to the invention are chosen from carboxylic acids and alpha-hydroxylated carboxylic acids or AHAs. Organic acids can be amino acids.

The organic acid or acids are preferably chosen from acetic acid, propanoic acid, butanoic acid, lactic acid, malic acid, glycolic acid, ascorbic acid and maleic acid. phthalic acid, succinic acid, aspartic acid, taurine, tartaric acid, arginine, glycine, glucuronic acid, gluconic acid and citric acid. Even more preferably still, the organic acid used in the composition according to the invention is chosen from acetic acid, citric acid, lactic acid, malic acid, succinic acid and aspartic acid, and preferably is lactic acid.

In the composition, the organic acid (s) may be in free or salified form. By "mineral acid" is meant any acid derived from a mineral compound. Among the mineral acids, there may be mentioned hydrochloric acid, orthophosphoric acid, sulfuric acid, sulfonic acids and nitric acid. Preferably, the organic acid or acids used in the present invention are chosen from lactic acid, citric acid, malic acid, acetic acid, succinic acid, aspartic acid, phosphoric acid and hydrochloric acid.

In a preferred variant, the acid (s) is (are) chosen from organic acids, even more preferentially from carboxylic acids, more preferably from lactic acid, citric acid, malic acid, acetic acid, succinic acid and aspartic acid.

The organic acid or acids which may be used in the composition according to the present invention may be present in a content expressed as free acids ranging from 0.01% to 10% by weight, preferably in a content ranging from 0.01 to 5% by weight, and even more preferably in a content ranging from 0.01 to 3% by weight, relative to the total weight of the composition. Preferably, the organic acid or acids are present in the compositions according to the invention so that the weight ratio between the amount of fatty-chain alkoxysilane (s) of formula (I) on the one hand and the amount of Organic acid (s) or mineral (s) on the other hand is preferably greater than or equal to 0.1. In a preferred embodiment, the weight ratio between the amount of alkoxysilane (s) with a fatty chain on the one hand and the amount of organic acid (s) or mineral (s) on the other hand goes from 0.1 to 50, preferably from 0.5 to 20, and more preferably from 1 to 10, and more preferably from 1 to 7. According to a preferred embodiment, the composition according to the invention further comprises one or several thickening agents. For the purposes of the present invention, the term "thickening agent" is understood to mean an agent which, introduced at 1% by weight in an aqueous or aqueous-alcoholic solution containing 30% of ethanol, and at pH = 7, makes it possible to attain a viscosity. at least 100 mPa.s (100 cPs), preferably at least 500 mPa.s (500 cPs), at 25 ° C and at a shear rate of 1 s'. This viscosity can be measured using a cone / plane viscometer (Haake R600 Rheometer or the like). The thickening agent (s) may be chosen from fatty acid amides obtained from C 10 -C 20 carboxylic acid, such as coconut acid monoisopropanol-, diethanol- or monoethanolamide, and acid monoethanolamide. oxyethylenated alkyl ether carboxylic, nonionic cellulosic thickeners, such as hydroxyethylcellulose, hydroxypropylcellulose and carboxymethylcellulose, guar gum and its nonionic derivatives such as hydroxypropylguar, gums of microbial origin such as gum xanthan, scleroglucan gum, homopolymers and crosslinked copolymers based on acrylic acid or methacrylic acid or acrylamidopropanesulfonic acid, and associative polymers, especially acrylic or polyurethanes as described below. .

The associative polymer or polymers that can be used according to the invention are water-soluble or water-dispersible polymers capable of associating reversibly with each other or with other molecules in an aqueous medium. Their chemical structure comprises hydrophilic zones, and hydrophobic zones characterized by the presence of at least one fatty chain preferably comprising from 10 to 30 carbon atoms. The associative polymer or polymers that may be used according to the invention may be of anionic, cationic, amphoteric or nonionic type, such as, for example, the polymers sold under the names Pemulen Tri or TR2 by the company Goodrich, whose INCI name is Acrylates. / C10-30 Alkyl Acrylate Crosspolymer, SALCARE SC90 by the company CIBA, ACULYN 22, 28, 33, 44 or 46 by the company ROHM & HAAS and ELFACOS T210 and T212 by the company AKZO.

Among the thickeners mentioned, non-ionic cellulosic thickeners, such as hydroxyethylcellulose, are preferably used. Preferably, the composition according to the invention comprises from 0.1 to 20% by weight, and more preferably from 0.2 to 10% by weight of thickening agent (s), relative to the total weight of the composition. In a particular embodiment, the composition according to the invention may further comprise one or more additives chosen from surfactants, alkoxysilanes different from those of formula (I), non-siliceous fatty substances, silicones, particles solids, reducing agents, and oxidizing agents. The composition according to the invention may therefore also comprise one or more surfactants chosen from cationic, anionic, nonionic, amphoteric and zwitterionic surfactants.

B 10-2763FR

The cationic surfactant (s) that may be used in the composition according to the invention comprise, for example, primary, secondary or tertiary fatty amine salts, optionally polyoxyalkylenated salts, quaternary ammonium salts, and mixtures thereof.

As quaternary ammonium salts, there may be mentioned, for example:

those corresponding to the following general formula (II) + Rs / R10NR9 / R11 (II) in which the groups Rg to RH, which may be identical or different, each represent an aliphatic group, linear or branched, comprising 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R 8 to R 11 having from 8 to 30 carbon atoms, preferably from 12 to 24 carbon atoms. The aliphatic groups can comprise heteroatoms such as in particular oxygen, nitrogen, sulfur and halogens.

The aliphatic groups are, for example, chosen from C1-C30alkyl, C1-C30alkoxy, polyoxyalkylene (C2-C6), C1-C30alkylamide, (C12-C12) alkylamido (C2-C6) alkyl, ( C12-C22) acetate, and C1-C30 hydroxyalkyl, X- is an anion selected from the group of halides, phosphates, acetates, lactates, (C1-C4) alkyl sulfates, (C1-C4) alkyl- or alkyl (C1 C4) arylsulphonates.

Of the quaternary ammonium salts of formula (II), tetraalkylammonium chlorides, such as, for example, dialkyldimethylammonium or alkyltrimethylammonium chlorides in which the alkyl group comprises from about 12 to 22 carbon atoms, are preferred. carbon, in particular behenyltrimethylammonium, distearyldimethylammonium, cetyltrimethylammonium, benzyldimethylstearylammonium chlorides or else distearoylethylhydroxyethylmethylammonium methosulphate, dipalmitoylethylhydroxyethylammonium methosulphate or distearoylethylhydroxyethylammonium methosulphate, or else finally, palmitylamidopropyltrimethylammonium chloride or stearamidopropyldimethyl (myristyl acetate) ammonium chloride sold under the name CERAPHYL® 70 by VAN DYK; the quaternary ammonium salts of imidazoline, for example those of the following formula (III): + R13 / R14

wherein R12 is alkenyl or alkyl having 8 to 30 carbon atoms, for example fatty acid derivatives of tallow, R13 represents a hydrogen atom, a C1-C4 alkyl group or an alkenyl or alkyl group having 8 to 30 carbon atoms, R14 represents a C1-C4 alkyl group, R15 represents a hydrogen atom, a C1-C4 alkyl group, X- is an anion chosen from the group of halides, phosphates, acetates, lactates , (C1-C4) alkyl sulfates, (C1-C4) alkyl or (C1-C4) alkyl aryl sulfonates. Preferably, R12 and R13 denote a mixture of alkenyl or alkyl groups containing from 12 to 21 carbon atoms, for example fatty acid derivatives of tallow, R14 denotes a methyl group, R15 denotes a hydrogen atom. Such a product is for example marketed under the name REWOQUAT® W 75 by the company REWO; the quaternary di- or triammonium salts, in particular of formula (IV) below: ## STR2 ## ## STR2 ## (IV) ## STR2 ## wherein R 16 is an alkyl group of about 16 to 30 carbon atoms, optionally hydroxylated and / or interrupted by one or more oxygen atoms; R17 is selected from hydrogen, an alkyl group having 1 to 4 carbon atoms or a group - (CH2) 3-N + (R16a) (R17a) (R18a); R16a, R17a, R18a, R18, R19, R20 and R21, which are identical or different, are chosen from hydrogen and an alkyl group comprising from 1 to 4 carbon atoms, and X- is an anion chosen from the group of halides, acetates, phosphates, nitrates, (C1-C4) alkyl sulfates, (C1-C4) alkyl or (C1-C4) alkylarylsulfonates, in particular methylsulfate and ethylsulfate. Such compounds are, for example, the Finquat CT-P proposed by Finetex (Quaternium 89), the Finquat CT proposed by Finetex (Quaternium 75); quaternary ammonium salts containing one or more ester functions, such as, for example, those of the following formula (V): ## STR2 ## wherein R22 is selected from C1-C6 alkyl groups and hydroxyalkyl or C1-C6 dihydroxyalkyl groups, R23 is selected from: - the group - the saturated or unsaturated linear or branched C1-C22 hydrocarbon groups R27, - the hydrogen atom, R25 is chosen from: ## STR2 ## the saturated or unsaturated linear or branched C1-C6 hydrocarbon groups R29, the hydrogen atom, R24, R26 and R28, which are identical or different, are chosen from linear or branched C7-C21 hydrocarbon groups; saturated or unsaturated; r, s and t, which are identical or different, are integers of from 2 to 6, r1 and t1 which are identical or different, are equal to 0 or 1, r2 + r1 = 2rett1 + t2 = 2t, y is an integer ranging from 1 to 10; , x and z, which may be identical or different, are integers ranging from 0 to 10, X- is a simple or complex anion, organic or inorganic, provided that the sum x + y + z is from 1 to 15, that when x is 0 then R23 is R27 and when z is 0 then R25 is R29. The alkyl groups R22 may be linear or branched, and more particularly linear. Preferably, R 22 denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group. Advantageously, the sum x + y + z is from 1 to 10. When R 23 is a hydrocarbon R 27 group, it may be long and have 12 to 22 carbon atoms, or short and have from 1 to 3 carbon atoms. 2966354 B 10-2763EN

When R 25 is a hydrocarbon R 29 group, it preferably has 1 to 3 carbon atoms.

Advantageously, R24, R26 and R28, which may be identical or different, are chosen from linear C11-C21 hydrocarbon groups or

5 branched, saturated or unsaturated, and more particularly from linear or branched, saturated or unsaturated C11-C21 alkyl and alkenyl groups.

Preferably, x and z, identical or different, are 0 or 1. Advantageously, y is equal to 1.

Preferably, r, s and t, identical or different, are 2 or 3, and even more particularly are 2.

The anion X- is preferably a halide, preferably chloride, bromide or iodide, a (C1-C4) alkyl sulphate, (C1-C4) alkyl or (C1-C4) alkyl aryl sulphonate. However, we can use the

Methanesulfonate, phosphate, nitrate, tosylate, an anion derived from an organic acid such as acetate or lactate or any other anion compatible with ester-function ammonium.

The anion X- is even more particularly chloride, methylsulfate or ethylsulfate.

In the composition according to the invention, the ammonium salts of formula (V) in which:

R22 denotes a methyl or ethyl group,

x and y are equal to 1,

z is 0 or 1,

R, s and t are 2,

- R23 is chosen from: O - the group R26 C - methyl, ethyl or C14-C229 hydrocarbon groups - the hydrogen atom, - R25 is chosen from: 2966354 B 10-2763EN 13 - - the group

The hydrogen atom, R24, R26 and R28, which are identical or different, are chosen from linear or branched, saturated or unsaturated C13-C17 hydrocarbon groups, and preferably from C13 alkyl and alkenyl groups; -C17, linear or branched, saturated or unsaturated. Advantageously, the hydrocarbon groups are linear. Examples of compounds of formula (V) include salts, especially diacyloxyethyldimethylammonium chloride, diacyloxyethylhydroxyethylmethylammonium chloride, monoacyloxyethyldihydroxyethylmethylammonium chloride, triacyloxyethylmethylammonium chloride, monoacyloxyethylhydroxyethyldimethylammonium chloride, and mixtures thereof. The acyl groups preferably have from 14 to 18 carbon atoms and come more particularly from a vegetable oil such as palm oil or sunflower oil. When the compound contains more than one acyl group, the latter may be the same or different. These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine, optionally oxyalkylenated, with fatty acids or mixtures of fatty acids of plant or animal origin, or with transesterification of their methyl esters. This esterification is followed by quaternization using an alkylating agent such as an alkyl halide, preferably methyl or ethyl, a dialkyl sulphate, preferably methyl or ethyl sulphate. methyl methanesulfonate, methyl para-toluenesulfonate, glycol or glycerol chlorohydrin. Such compounds are, for example, sold under the names DEHYQUART® by the company HENKEL, B 10-2763EN 14 STEPANQUAT® by the company STEPAN, NOXAMIUM® by the company CECA, REWOQUAT® WE 18 by the company REWO-WITCO. The composition according to the invention may contain, for example, a mixture of quaternary ammonium mono-, di- and triester salts with a majority by weight of diester salts. As a mixture of ammonium salts, it is possible to use, for example, the mixture containing 15 to 30% by weight of acyloxyethyl-dihydroxyethyl-methylammonium methylsulfate, 45 to 60% of diacyloxyethyl-hydroxyethyl-methylammonium methylsulfate and 15 to 30% of triacyloxyethylmethylammonium methylsulfate, the acyl groups having from 14 to 18 carbon atoms and coming from partially hydrogenated palm oil. It is also possible to use the ammonium salts containing at least one ester function described in patents US-A-4874554 and US-A-4137180. It is also possible to use behenoylhydroxypropyltrimethylammonium chloride, for example, proposed by the company KAO under the Quartamin BTC 131. Preferably, the ammonium salts containing at least one ester function contain two ester functions. Among the cationic surfactants that may be present in the composition according to the invention, it is more particularly preferred to choose the salts of cetyltrimethylammonium, behenyltrimethylammonium, dipalmitoylethylhydroxyethylmethylammonium, and mixtures thereof, and more particularly behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, dipalmitoylethylhydroxyethylammonium methosulfate, and mixtures thereof. When present, the amount of the cationic surfactant (s) preferably ranges from 0.01 to 20% by weight, more preferably from 0.2 to 10% by weight, relative to the total weight of the composition. The term "anionic surfactant" is understood to mean a surfactant comprising as ionic or ionizable groups only anionic groups. These anionic groups are preferably selected from -CO2H, -CO2-, -SO3H, -SO3-, -OSO3H, -OSO3, -H2PO3, -HPO3, -PO32, -H2PO2, = HPO2 groups, -HPO2, = PO2-, = POH, = P0-. As examples of anionic surfactants that may be used in the composition according to the invention, mention may be made of alkyl sulphates, alkyl ether sulphates, alkylamido ether sulphates, alkylaryl polyether sulphates, monoglyceride sulphates, alkyl sulphonates, alkyl amide sulphonates and alkyl aryl sulphonates. , alpha-olefin-sulfonates, paraffin-sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, acylsarcosinates, acylglutamates, alkylsulfosuccinamates, acylisethionates and N-acyltaurates, monoesters salts of alkyl and polyglycoside-polycarboxylic acids, acyllactylates, D-galactoside-uronic acid salts, alkyl ether-carboxylic acid salts, alkyl aryl ether carboxylic acid salts, alkyl acid salts amidoether carboxylic acids, and the corresponding non-salified forms of all these compounds, alkyl and acyl groups. all these compounds having from 6 to 24 carbon atoms and the aryl group denoting a phenyl group. These compounds may be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units. The salts of C 6 -C 24 alkyl monoesters and of polyglycoside-polycarboxylic acids may be chosen from C 6 -C 24 alkyl polyglycoside-citrates, C 6 -C 24 alkyl polyglycoside-tartrates and polyglycoside-sulphosuccinates. C6-C24 alkyl. When the agent or the anionic surfactants are in the salt form, they may be chosen from alkali metal salts such as the sodium or potassium salt and preferably sodium salt, ammonium salts, amine salts and in particular aminoalcohols or alkaline earth metal salts such as magnesium salts.

By way of example of aminoalcohol salts, mention may be made in particular of the salts of mono-, di- and triethanolamine, the salts of mono-, di- or triisopropanolamine and the salts of 2-amino-2. 1-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol and tris (hydroxymethyl) amino methane. The alkali metal or alkaline earth metal salts and in particular the sodium or magnesium salts are preferably used. Of the abovementioned anionic surfactants, it is preferred to use (C 6 -C 4) alkyl sulphates, alkyl (C 6 -C 4) ethersulphates comprising from 2 to 50 ethylene oxide units, in particular in the form of alkali metal or ammonium salts. , aminoalcohols, and alkaline earth metals, or a mixture of these compounds. In particular, it is preferred to use alkyl (C 1 -C 20) sulphates, alkyl (C 1 -C 20) ether sulphates comprising from 2 to 20 ethylene oxide units, in particular in the form of alkali metal, ammonium or aminoalcohol salts. , and alkaline earth metals, or a mixture of these compounds. More preferably, it is preferred to use sodium lauryl ether sulfate with 2.2 moles of ethylene oxide. When present, the amount of the anionic surfactant (s) preferably ranges from 0.01 to 20% by weight, more preferably from 0.2 to 10% by weight, relative to the total weight of the composition. Examples of nonionic surfactants useful in the composition used according to the invention are described, for example, in "Handbook of Surfactants" by M. R. PORTER, Blackie & Son editions (Glasgow and London), 1991, pp. 116-178. They are chosen in particular from alcohols, alpha-diols and (C1-C20) alkyl phenols, these compounds being polyethoxylated, polypropoxylated and / or polyglycerolated and having at least one fatty chain comprising, for example, from 8 to 18 carbon atoms. carbon, the number of ethylene oxide groups and / or propylene oxide may range from 2 to 50 and the number of glycerol groups may range from 2 to 30. Mention may also be made of copolymers of ethylene oxide and propylene oxide, esters of optionally oxyethylenated fatty and sorbitan acids, sucrose fatty acid esters and polyoxyalkylenated fatty acid esters. alkylpolyglycosides, optionally oxyalkylenated, alkylglucoside esters, N-alkylglucamine and N-acyl-methylglucamine derivatives, aldobionamides and amine oxides. Unless otherwise stated, the term "fatty" compound is used, for example a fatty acid, a compound comprising in its main chain at least one hydrocarbon chain, saturated or unsaturated, such as alkyl or alkenyl having at least 8 carbon atoms. carbon, preferably 8 to 30 carbon atoms, and more preferably 10 to 22 carbon atoms. When present, the amount of the nonionic surfactant (s) preferably ranges from 0.01 to 20% by weight, more preferably from 0.2 to 10% by weight, relative to the total weight of the composition. The amphoteric or zwitterionic surfactant (s), preferably non-silicone, which may be used in the present invention may be in particular derivatives of secondary or tertiary aliphatic amines, optionally quaternized, in which the aliphatic group is a linear or branched chain containing from 8 to 8 carbon atoms. at 22 carbon atoms, said amine derivatives containing at least one anionic group such as, for example, a carboxylate group, sulfonate, sulfate, phosphate or phosphonate. Mention may in particular be made of (C 8 -C 20) alkyl betaines, sulphobetaines, (C 8 -C 20) alkylamido (C 3 -C 8) alkyl betaines and (C 8 -C 20) alkylamido (C 6 -C 8) alkyl sulphobetaines. Among the derivatives of secondary or tertiary aliphatic amines, optionally quaternized, which may be used, as defined above, there may also be mentioned the following compounds of structures (A1) and (A2):

Embedded image in which: Ra represents a C 10 -C 30 alkyl or alkenyl group derived from an acid RaCOOH, preferably present in hydrolysed coconut oil; embedded image in which R 10 is embedded image heptyl, nonyl or undecyl, Rb is beta-hydroxyethyl, and Rc is carboxymethyl; and Ra, CONHCH2CH2N (B) (B ') (A2) wherein: B represents the group -CH2CH2OX', B 'represents the group - (CH2), Y', with z = 1 or 2, X 'represents the group -CH 2 COOH, CH 2 COO 2 ', - CH 2 CH 2 COOH, -CH 2 CH 2 CO 2 O', or a hydrogen atom, Y 'represents the group -COOH, -COOZ', the group - CH 2 CHOHSO 3 H or the group -CH 2 CHOHSO 3 Z ', Z' represents an ion derived from an alkali metal or alkaline earth metal, such as sodium, an ammonium ion or an organic amine ion, Ra, represents a C 10 -C 30 alkyl or alkenyl group of an R a, 000 H acid preferably present in the coconut oil or hydrolyzed linseed oil, an alkyl group, especially C17 and its iso form, an unsaturated C17 group. These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names cocoamphodiacétate disodium, lauroamphodiacétate disodium, caprylamphodiacétate disodium, capryloamphodiacétate disodium, cocoamphodipropionate disodium, lauroamphodipropionate disodium, caprylamphodipropionate disodium, capryloamphodipropionate disodium, acid lauroamphodipropionic, cocoamphodipropionic acid. By way of example, mention may be made of cocoamphodiacetate marketed by Rhodia under the trade name MIRANOL® C2M concentrate.

Among the amphoteric or zwitterionic surfactants mentioned above, use is preferably made of alkyl (C 8 -C 20) betaines such as cocobetaine, (C 8 -C 20) alkylamido (C 3 -C 8) alkyl betaines, such as cocamidopropylbetaine, and mixtures thereof. More preferably, the amphoteric or zwitterionic surfactant (s) is (are) chosen from cocamidopropylbetaine and cocobetaine. When present, the amount of the amphoteric or zwitterionic surfactant (s) preferably ranges from 0.01 to 20% by weight, more preferably from 0.2 to 10% by weight, relative to the total weight of the composition. Other alkoxysilanes, different from those of formula (I), may be used in the composition and are preferably compounds of formula (G) 4-XSi (OR) X, with x denoting an integer ranging from 1 to 3, G designating identical or different monovalent groups and R denoting a monovalent hydrocarbon group comprising one or more carbon atoms and optionally one or more heteroatoms. Preferably, the alkoxysilane (s), other than the alkoxysilanes of the invention, contain two or three alkoxy functions. Preferably, the alkoxy functional group (s) are chosen from methoxy and ethoxy functions. According to a particular embodiment, the additional alkoxysilane (s) comprise one or more solubilizing functional groups. For the purposes of the present invention, the term "solubilising functional group" is intended to mean any functional chemical group facilitating the dissolution of the alkoxysilane in the medium of the composition, that is to say in the solvent or solvent mixture of the composition, in particular in water or in hydroalcoholic mixtures. As solubilizing functional group that may be used according to the present invention, mention may be made of the primary, secondary and tertiary amine groups, aromatic amine, alcohol, carboxylic acid, sulphonic acid, anhydride, carbamate, urea, guanidine, aldehyde, and the like. Ester, amide, epoxy, pyrrole, dihydroimidazole, gluconamide, pyridyl and polyether.

This or these alkoxysilanes containing one or more solubilizing functional groups may contain one or more silicon atoms.

The alkoxysilane (s) containing one or more solubilizing functional groups generally contain two or three alkoxy functions. Preferably, the alkoxy functions are methoxy or ethoxy functions.

According to a particular embodiment, the alkoxysilane or alkoxysilanes, other than the alkoxysilanes of the invention, are chosen from compounds of the following formula (VI): ## STR1 ## in which which :

R6 represents a halogen, a group OR 'or R'6,

R7 represents a halogen, a group OR "or R'7,

Rg represents a halogen, a group OR "'or R'g,

R3, R4, R5, R ', R ", R"', R'6, R'7, R'g represent, independently of one another, a saturated or unsaturated hydrocarbon group, linear or branched, optionally bearing groups additional chemical compounds, R3, R4, R ', R "and R"' being further

Denote hydrogen, at least two of the groups R6, R7 and Rg being different from the groups R'6, R'7 and R'g, two or more of the groups R ', R "and R"' being different from the group 'hydrogen.

Preferably, the groups R 3, R 4, R ', R' 6, R '7, R' 8, R "and R" 'are selected from C 1 to C 12 alkyl, C 6 to C 14 aryl, alkyl of C1 to C6-C6 to C14-aryl and C6 to C14-alkyl of C1 to C6.

According to a preferred embodiment of this embodiment, the alkoxysilane or alkoxysilanes comprise a substituent comprising a primary amine function, and are chosen from the compounds of formula (VII) below: OR / H2N (CH2) ) Si-OR OR (VII) in which the groups R, which are identical or different, are chosen from C1-C6 alkyl groups and n is an integer from 1 to 6, preferably from 2 to 4. An alkoxysilane particularly preferred according to this embodiment is γ-aminopropyl triethoxysilane. Such a compound is, for example, sold under the name Z-6011 Silane by the company Dow Corning. According to another embodiment of the invention, the alkoxysilane (s) other than the alkoxysilanes of the invention are chosen from the following compounds of formula (VIII):

Wherein R 11 represents a halogen or a group OR '11 and R 12 represents a halogen or a group OR' 12, at least one of the groups R 11 and R 12 being different from a halogen , R'11 and R'12 represent, independently of one another, hydrogen or a linear or branched, saturated or unsaturated C1-C14 hydrocarbon group, at least one of R '11 groups and R'12 being different from hydrogen, R9 is a non-hydrolysable functional group with a cosmetic effect, and Rio is a non-hydrolysable functional group carrying a functional group chosen from amine and carboxylic acid functions. and their salts, sulphonic acid and its salts, polyalcohol such as glycol, polyether such as polyalkylene ether, and phosphoric acid and its salts. The term "functional group having a cosmetic effect" means a group chosen from groups derived from a reducing agent, an oxidizing agent, a coloring agent, a polymer, a surfactant, an antibacterial or a UV filter. Examples of groups derived from a coloring agent are inter alia aromatic nitro groups, anthraquinone, naphthoquinone, benzoquinone, azo, xanthene, triarylmethane, azine, indoaniline indophenolic or indoamine. Examples of reducing groups are, for example, thiol groups, sulfinic acid or sulphinic acid salt. As an example of an alkoxysilane of formula (VII), there may be mentioned aminopropyl-N- (4,2-dinitrophenyl) amino propyl diethoxysilane. Such compounds are for example described in the patent application EP 1 216 023. The alkoxysilane (s), other than the alkoxysilanes of the invention, may also be chosen from the compounds of formula (IX) below:

/ R14 R13 SI-R15 R1s

wherein: R14 is halogen, OR '14 or Ro, R15 is halogen, OR' 15 or R'0, R16 is halogen, OR '16 or R' 0, two or more of R14, R15 and R16 groups being different from the groups Ro, R'o and R "o, B R13 is a group chosen from groups bearing at least one functional group chosen from carboxylic acid functions and its salts, sulfonic acid and its salts, polyalkyl ethers (or polyoxyalkylene).

Ro, R'o, R "0, R'14, R'15 and R '16 represent, independently of one another, a saturated or unsaturated, linear or branched C1-C14 hydrocarbon group optionally carrying additional chemical functions. chosen from carboxylic acid functions and its salts, sulphonic acid and its salts, and polyalkyl ethers, R'14, R'15 and R'16 may further denote hydrogen, at least two groups R'14, R'15 and R '16 being different from hydrogen, R'14, R'15 and R' 16, Ro, R'o and R "o are preferably C 1 -C 12 alkyl, C 6 C14, C1 to C6 alkyl of C6 to C14 alkyl, or C6 to C14 aryl of C1 to C6 alkyl. According to another embodiment, the alkoxysilane (s), other than the alkoxysilanes of the invention, are chosen from compounds of the following formula (X): (R21O) X (R22) ySi (B) pLNR23 (B "p ') ] qLNR'23 (B ") >> p] q If (R'22) y ° (OR'21) X

(X)

in which: R21, R22, R'21 and R'22 each independently represent a saturated or unsaturated hydrocarbon chain, linear or branched, optionally containing one or more heteroatoms, optionally interrupted or substituted with one or more groups selected from ether groups, ester, amine, amide, carboxyl, hydroxyl and carbonyl, x is an integer ranging from 1 to 3, y = 3-x, x 'is an integer ranging from 1 to 3, y' = 3-x ', p = 0 or 1, p '= 0 or 1, p "= 0 or 1, q = 0 or 1, q' = 0 or 1, with the proviso that at least q or q 'is other than zero, B 10-2763EN 24 B , B 'and B "each independently represent a divalent linear or branched C1-C20 alkylene group, R23 and R'23 each independently represent a hydrogen atom or a saturated or unsaturated hydrocarbon chain, linear or branched, optionally containing one or several heteroatoms, optionally interrupted or substituted by one or more ether groups, is C1-C20 alcohol, amine, carboxyl, alkoxysilane, C6-C30 aryl, hydroxyl or carbonyl, or an aromatic ring, heterocyclic or not, optionally substituted with one or more C3-C20 alcohol ester groups, amine, amide, carboxyl, alkoxysilane, hydroxyl, carbonyl or acyl. As previously explained, R21, R22, R'21 and R'22 each independently represent a hydrocarbon chain. By "hydrocarbon chain" is preferably meant a chain having from 1 to 10 carbon atoms. Similarly, R23 and R'23 may represent a hydrocarbon chain. In this case, it is preferable to mean a chain comprising from 1 to 10 carbon atoms. Preferably, the aromatic ring has from 6 to 30 carbon atoms. Even more preferentially, it denotes an optionally substituted phenyl group. Preferably, R21 = R'21, R22 = R'22, x = x ', y = y', p = p ', A = A', q = 1 and q '= 0. The alkoxysilane (s) of formula (X) may also have the following characteristics, taken alone or in combination: - R21, R22, R'21 and R'22, identical or different, represent a C1-C4 alkyl, - p = p '= 1, - B and B ', which may be identical or different, represent a linear C1-C4 alkylene and - R23 is hydrogen. Examples of alkoxysilanes of formula (X) are alkoxysilanes comprising a secondary amine such as bis [3- B 10-2763 (triethoxysilyl) propyl] amine of formula (CH 3 CH 2 O) 3 Si (CH 2) 3 NH (CH 2) 3 Si (OCH2CH3) 3 provided by FLUOROCHEM, bis [trimethoxysilylpropyl] amine of formula (CH 3 O) 3 -Si (CH 2) 3 NH (CH 2) 3 Si (OCH 3) 3 provided by Gelest, bis [methyldiethoxysilylpropyl] amine of formula (CH 3 CH 2 O) 2 CH 3 Si (CH 2) 3 NH (CH 2) 3 SiCH 3 (OCH 2 CH 3) 2 provided by Gelest and bis [3-trimethoxysilylpropyl] ethylenediamine of formula (CH 3 O) 3 Si (CH 2) 3 NH (CH) 2 NH (CH 2) 3 Si (OCH 3 ) 3 proposed by the company GELEST. According to another embodiment of the invention, the alkoxysilane (s), other than the alkoxysilanes of the invention, are chosen from compounds of the following formula (XI): (R240) x "(R25) Y Si (E) wherein R24 and R25 each independently represent a saturated or unsaturated hydrocarbon chain, linear or branched, optionally containing one or more heteroatoms, optionally interrupted or substituted by one or more groups selected from the group consisting of ether, ester, amine, amide, carboxyl, hydroxyl and carbonyl, x "= 2 or 3, y" = 3-x "n = 0 or, n" = 0 or 1, E and E 'each independently represent a divalent alkylene group linear or branched C1-C20, R26 and R27 each independently represent hydrogen or a saturated or unsaturated hydrocarbon chain, linear or branched, optionally containing one or more heteroatoms, ## STR1 ## XI) B 10-2763EN 26 possibly interrupted or substituted with one or more ether groups, C1-C20 alcohol ester, amine, carboxyl, alkoxysilane, C6-C30 aryl, hydroxyl or carbonyl, or an aromatic ring, heterocyclic or not, optionally substituted with one or more ester groups of C1-C20 alcohol, amine, amide, carboxyl, alkoxysilane, hydroxyl, carbonyl or acyl, r is an integer ranging from 0 to 4, r '= 0 or 1, the R28 group (s) independently represent hydrogen or saturated or unsaturated hydrocarbon chain, linear or branched, preferably C 1 -C 1 o, optionally containing one or more heteroatoms, optionally interrupted or substituted with one or more ether groups, C 1 -C 20 alcohol ester, amine, carboxyl , an alkoxysilane, a C 6 -C 30 aryl, hydroxyl or carbonyl, or an aromatic ring, heterocyclic or not, optionally substituted by one or more C 1 -C 20 alcohol ester, amine, amide, carboxyl, alkoxysilane, hydroxyl, carbonyl oracyl. As previously explained, R24 and R25 each independently represent a hydrocarbon chain. By "hydrocarbon chain" is preferably meant a chain having from 1 to 10 carbon atoms. Similarly, R26 and R27 may represent a hydrocarbon chain. In this case, it is preferable to mean a chain comprising from 1 to 10 carbon atoms. Preferably, the aromatic ring has from 6 to 30 carbon atoms. Even more preferentially, it denotes an optionally substituted phenyl group. The alkoxysilane (s) of formula (XI) may have the following characteristics, taken alone or in combination: R 24 is C 1 -C 4 alkyl, - x "= 3, n '= n" = 1; R26 and R27 are independently hydrogen or a group selected from C1-C4 alkyl, C1-C4 hydroxyalkyl and C1-C4 aminoalkyl. In particular, the alkoxysilane (s) of formula (XI) may be chosen from:

3- (m-aminophenoxy) propyltrimethoxysilane, of formula: O (CH 2) 3 -Si (OCH 3) 3 H 2 N 10 - p-aminophenyltrimethoxysilane, of formula: Si (OCH 3) 3 - N- (2-aminoethylaminomethyl) phenethyltrimethoxysilane, of formula: CH 2 NH (CH 2) 2 NH 2.

The alkoxysilane (s), other than the alkoxysilanes of the invention, may also be chosen from the following compounds of formula (XII) and their acetals:

(R29O) X1 (R3o) yl Si (A1) sCH = O (XII) wherein R29 and R30 each independently represent a saturated or unsaturated hydrocarbon chain, linear or branched, optionally containing one or more heteroatoms optionally interrupted or substituted by one or more groups selected from ether, ester, amine, amide, carboxyl, hydroxyl and carbonyl groups, x1 = 2 or 3, yl = 3-xl, Al represents a divalent alkylene group, linear or branched C1-C20, optionally interrupted or substituted with one or more C1-C30 alcohol ester, amine, carboxyl, alkoxysilane, C6-C30 aryl, hydroxyl or carbonyl groups, s = 0 or 1. As previously explained, R29 and R30 each independently represent a hydrocarbon chain. By "hydrocarbon chain" is preferably meant a chain having from 1 to 10 carbon atoms. The alkoxysilane (s) of formula (XII) may also have the following characteristics, taken alone or in combination: R 29 and R 30 are chosen from C 1 -C 4 alkyls, s = 1, Al is a C 1 -C 4 linear alkylene. In particular, the alkoxysilane (s) of formula (XII) may be chosen from: triethoxysilylbutyraldehyde, of formula:

(CH 3 CH 2 O) 3 Si (CH 2) 3 CH = 0 - triethoxysilylundecanal, of formula:

(CH 3 CH 2 O) 3 Si (CH 2) 10 CH = 0 and

triethoxysilylundecanal, ethylene glycol acetal of formula: ## STR2 ## (CH 3 CH 2 O) 3 Si (CH 2) 10 CH (OCH 2) 2.

The preferred compound of formula (XII) is triethoxysilylbutyraldehyde. This compound is for example sold under the name SIT 8185.3 by the company GELEST. According to a particularly preferred embodiment of the invention, the alkoxysilane (s), other than the alkoxysilanes of the invention, are chosen from di- and / or trialkoxysilanes having one or more substituents comprising one or more amine functional groups. According to an even more preferred embodiment, the alkoxysilane (s), other than the alkoxysilanes of the invention, are chosen from trialkoxysilanes having a substituent comprising one or more amine functional groups. Even more preferentially, the alkoxysilane (s), other than the alkoxysilanes of the invention, are chosen from trialkoxysilanes having a substituent comprising one or more amine functions, more preferably from the compounds of formula (VII). A most preferred additional alkoxysilane is the y-aminopropyl triethoxysilane mentioned above. The alkoxysilane (s), other than the alkoxysilanes of the invention, may be present in the compositions according to the invention in proportions ranging, preferably, from 0.01 to 25% by weight, more preferably from 0.05 to at 20% by weight, better still from 0.1 to 10% by weight, relative to the total weight of the composition. The composition according to the invention may also comprise one or more non-siliceous fatty substances. By "fatty substance" is meant an organic compound insoluble in water at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg, ie 1.013 × 10 5 Pa), that is to say of lower solubility. at 5% and preferably less than 1%, even more preferably less than 0.1%. Non-siliceous fatty substances generally have a hydrocarbon chain having at least 6 carbon atoms and not including a siloxane group in their structure. In addition, the fatty substances are generally soluble in organic solvents under the same conditions of temperature and pressure, such as, for example, chloroform, ethanol, benzene, liquid petrolatum or decamethylcyclopentasiloxane. Non-siliceous fatty substance is understood to mean a fatty substance whose structure does not contain silicon atoms. The fatty substances that can be used in the composition according to the invention are generally not oxyalkylenated and preferably do not contain a carboxylic acid function COOH. Preferably, the non-siliceous fatty substances of the invention are chosen from hydrocarbons, fatty alcohols, fatty esters, fatty ethers, non-siliceous waxes and mixtures thereof.

Even more preferentially, they are chosen from hydrocarbons, fatty alcohols, fatty esters, ceramides and their mixtures. They can be liquid or non-liquid at room temperature and at atmospheric pressure.

The liquid fatty substances of the invention preferably have a viscosity of less than or equal to 2 Pa.s, more preferably less than or equal to 1 Pa.s, and more preferably less than or equal to 0.1 Pa.s at a temperature of 25 ° C. C and at a shear rate of 1 s-1. By liquid hydrocarbon is meant a hydrocarbon composed solely of carbon atoms and hydrogen, liquid at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg, ie 1.013 × 10 5 Pa), in particular of mineral origin or vegetable, preferably of plant origin. More particularly, the liquid hydrocarbons are chosen from: linear or branched C6-C16 alkanes, which may be cyclic. As examples, mention may be made of hexane, undecane, dodecane, tridecane and isoparaffins such as isohexadecane, isododecane and isodecane.

- linear or branched hydrocarbons of animal or synthetic mineral origin, of more than 16 carbon atoms, such as paraffin oils, whether volatile or not, petroleum jelly, liquid petroleum jelly, polydecenes hydrogenated polyisobutene such as that sold under the trade name Parleam® by the company NOF Corporation, squalane. In a preferred variant, the liquid hydrocarbon or hydrocarbons are chosen from paraffin oils, volatile or not, and their derivatives, and petrolatum oil. By liquid fatty alcohol is meant a non-glycerolated and non-oxyalkylenated fatty alcohol, liquid at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg, ie 1.013 × 10 5 Pa). Preferably, the liquid fatty alcohols of the invention contain from 8 to 30 carbon atoms. The liquid fatty alcohols of the invention can be saturated or unsaturated. Saturated liquid fatty alcohols are preferably branched. They may optionally comprise in their structure at least one aromatic cycle or not. Preferably, they are acyclic. More particularly, the liquid saturated fatty alcohols of the invention are chosen from octyldodecanol, isostearyl alcohol and 2-hexyldecanol. Octyldodecanol is particularly preferred. The unsaturated liquid fatty alcohols have in their structure at least one double or triple bond, and preferably one or more double bonds. When more than one double bond is present, it is preferably 2 or 3 and may or may not be conjugated. These unsaturated fatty alcohols can be linear or branched. They may optionally comprise in their structure at least one aromatic cycle or not. Preferably, they are acyclic. More particularly, the liquid unsaturated fatty alcohols of the invention are chosen from oleic (or oleyl) alcohol, linoleic (or linoleyl) alcohol, linolenic (or linolenyl) alcohol, and undecylenic alcohol.

B oleic alcohol is particularly preferred. By liquid fatty esters is meant an ester derived from a fatty acid and / or a fatty alcohol, liquid at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg, ie 1.013 × 10 5 Pa).

The esters are preferably the liquid esters of linear or branched C 1 -C 26 saturated or unsaturated aliphatic mono- or polyacids and linear or branched C 1 -C 26 saturated or unsaturated aliphatic mono- or polyalcohols, the total number of the carbon atoms of the esters being greater than or equal to 10.

Preferably, for the monoalcohol esters, at least one of the alcohol or the acid from which the esters of the invention are derived is branched. Among monoesters of monoacids and monoalcohols, mention may be made of ethyl and isopropyl palmitates, alkyl myristates such as isopropyl or ethyl myristate, isocetyl stearate, isononanoate of 2 ethylhexyl, isononyl isononanoate, isodecyl neopentanoate, and isostearyl neopentanoate. It is also possible to use esters of C 4 -C 22 di- or tricarboxylic acids and of C 1 -C 22 alcohols and esters of mono-, di- or tricarboxylic acids and of non-sugar alcohols di-, tri- , pentahydroxylated C4-C26 tetraou. Mention may especially be made of diethyl sebacate, diisopropyl sebacate, di (2-ethylhexyl) sebacate, diisopropyl adipate, di-n-propyl adipate, dioctyl adipate, di-di-adipate and the like. (2-ethylhexyl), diisostearyl adipate, di (2-ethylhexyl) maleate, triisopropyl citrate, triisocetyl citrate, trisostearyl citrate, glyceryl trilactate, glyceryl trioctanoate, citrate of trioctyldodecyl, trioleyl citrate, neopentyl glycol diheptanoate, and diethylene glycol diisononate. The composition may also comprise, as liquid fatty ester, esters and diesters of sugars and of C6-C30 fatty acids, preferably of C12-C22 fatty acids. It is recalled that the term "sugar" means oxygenated hydrocarbon compounds which have several alcohol functional groups, with or without an aldehyde or ketone function, and which contain at least 4 carbon atoms. These sugars can be monosaccharides, oligosaccharides or polysaccharides.

Suitable sugars include, for example, sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their alkylated derivatives, such as than methylated derivatives such as methylglucose.

The esters of sugars and fatty acids may be chosen in particular from the group comprising the esters or mixtures of esters of sugars described above and of C 6 -C 30, preferably C 12 -C 22 fatty acids, linear or branched, saturated or unsaturated. If unsaturated, these compounds may comprise one to three carbon-carbon double bonds, conjugated or otherwise. The esters according to this variant can also be chosen from mono-, di-, tri- and tetraesters, polyesters and their mixtures. These esters may be for example oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates, arachidonates, and mixtures thereof, such as, in particular, the mixed oleo-palmitate, oleostearate and palmitostearate esters. More particularly, mono- and di-esters, and especially mono- or dioleates, stearates, behenates, oleopalmitates, linoleates, linolenates, oleostearates, sucrose, glucose or methylglucose are used. By way of example, mention may be made of the product sold under the name Glucate® DO by the company Amerchol, which is a methylglucose dioleate. Finally, it is also possible to use natural or synthetic esters of mono-, di- or triacids with glycerol. Among these, we can mention vegetable oils.

As oils of vegetable origin or synthetic triglycerides which can be used in the composition of the invention as liquid fatty esters, mention may be made, for example, of: triglyceride oils of plant or synthetic origin, such as liquid triglycerides of fatty acids containing from 6 to 30 carbon atoms, such as the triglycerides of heptanoic or octanoic acids, or else, for example, sunflower, corn, soya, squash, grape seed or sesame oils, hazelnut, apricot, macadamia, arara, sunflower, castor oil, avocado, olive, rapeseed, copra, wheat germ, sweet almond, apricot, safflower , bancouli nut, camellina, tamanu, lemon, babassu and pracaxi, triglycerides of caprylic / capric acids such as those sold by the company STEARINERIES DUBOIS or those sold under the names Miglyol® 810, 812 and 818 by the company DYNAMIT NOBEL, jojoba oil, shea butter oil. Preferably, as esters according to the invention, liquid fatty esters derived from monoalcohols will be used. Myristate or isopropyl palmitate are particularly preferred.

The liquid fatty ethers are chosen from liquid dialkyl ethers such as dicaprylyl ether. The fatty substance (s) used in the composition according to the invention may also be non-liquid fatty substances at ambient temperature (25 ° C.) and at atmospheric pressure (760 mmHg, ie 1.013 × 10 5 Pa). The term "non-liquid" preferably means a solid compound or a compound having a viscosity greater than 2 Pa.s at a temperature of 25 ° C. and at a shear rate of 1 s -1. More particularly, the non-liquid fatty substances are chosen from fatty alcohols, fatty acid esters and / or fatty alcohol esters, non-siliceous waxes and fatty, non-liquid and preferably solid ethers. The non-liquid fatty alcohols that are suitable for carrying out the invention are more particularly chosen from linear or branched, linear or branched, saturated alcohols containing from 8 to 30 carbon atoms. There may be mentioned, for example, cetyl alcohol, stearyl alcohol and their mixture (cetylstearyl alcohol). As regards the fatty acid esters and / or non-liquid fatty alcohols, there may be mentioned in particular solid esters derived from C 9 -C 26 fatty acids and C 9 -C 26 fatty alcohols. Among these esters, mention may be made of octyldodecyl behenate, isoketyl behenate, cetyl lactate, stearyl octanoate, octyl octanoate, cetyl octanoate, decyl oleate, myristyl stearate, octyl palmitate, octyl pelargonate, octyl stearate, alkyl myristates such as cetyl, mirystyl or stearyl myristate, and hexyl stearate. Still within the context of this variant, it is also possible to use esters of C 4 -C 22 di- or tricarboxylic acids and of C 1 -C 22 alcohols and esters of mono-, di- or tricarboxylic acids and alcohols. di-, tri-, tetra- or pentahydroxylated C2-C26. These include diethyl sebacate, diisopropyl sebacate, diisopropyl adipate, di-n-propyl adipate, dioctyl adipate, and dioctyl maleate. Of all the esters mentioned above, it is preferred to use myristyl, cetyl, stearyl palmitates, alkyl myristates such as cetyl myristate, stearyl myristate and myristyl myristate.

The non-siliceous wax or waxes are chosen in particular from Carnauba wax, Candelila wax, Alfa wax, paraffin wax, ozokerite, vegetable waxes such as olive wax, rice wax, hydrogenated jojoba wax or absolute waxes of flowers such as the essential wax of blackcurrant sold by the company BERTIN (France), animal waxes such as beeswax, or modified beeswaxes (cerabellina), and ceramides. Ceramides or ceramide analogues, such as glycoceramides which can be used in the compositions according to the invention, are known per se and are natural or synthetic molecules capable of satisfying the following general formula (XIII): ## STR2 ## -CH-CH2OR2 (XIII) in which: - R1 denotes a linear or branched, saturated or unsaturated alkyl group, derived from C14-C30 fatty acids, this group may be substituted by a hydroxyl group in alpha position, or a Omega-hydroxyl group esterified with a saturated or unsaturated C16-C30 fatty acid; - Rz denotes a hydrogen atom or a (glycosyl), (galactosyl) m or sulphogalactosyl group, in which n is an integer ranging from 1 to 4 and m is an integer ranging from 1 to 8; R3 denotes a C15-C26 hydrocarbon group, saturated or unsaturated in the alpha position, this group possibly being substituted with one or more C1-C14 alkyl groups; it being understood that in the case of natural ceramides or glycoceramides, R3 may also designate a C15-C26 alpha-hydroxyalkyl group, the hydroxyl group optionally being esterified with a C16-C30 alpha-hydroxy acid. Preferred ceramides in the context of the present invention are those described by DOWNING in Arch. Dermatol, Vol. 123, 1381-1384, 1987, or those described in French Patent FR 2,673,179. The ceramide or ceramides more particularly preferred according to the invention are the compounds for which R 1 denotes a saturated or unsaturated alkyl group, derived from acids. C16-C22 fatty acids; Rz denotes a hydrogen atom; and R3 denotes a C15 saturated linear group. Such compounds are, for example: N-linoleoyldihydrosphingosine, N-oleoyldihydrosphingosine, N-palmitoyldihydrosphingosine, N-stearoyldihydrosphingosine, N-behenoyldihydrosphingosine, or mixtures thereof . Even more preferentially, the ceramides for which R 1 denotes a saturated or unsaturated alkyl group derived from fatty acids are used; Rz is a galactosyl or sulfogalactosyl group; and R3 denotes a group -CH = CH- (CH2) 12-CH3.

Other waxes or waxy raw materials that can be used according to the invention are in particular marine waxes, such as those sold by SOPHIM under the reference M82, and polyethylene or polyolefin waxes in general. The non-liquid fatty ethers are chosen from dialkyl ethers and in particular dicetyl ether and distearyl ether, alone or as a mixture. Preferably, the non-siliceous fatty substances according to the invention are chosen from hydrocarbons, fatty alcohols, fatty esters and ceramides.

Even more preferably, the non-siliceous fatty substances are chosen from liquid petrolatum, stearyl alcohol, cetyl alcohol and mixtures thereof such as cetylstearyl alcohol, octyldodecanol, oleic alcohol, palmitate and the like. isopropyl, isopropyl myristate, N-oleoyldihydrosphingosine, N-behenoyldihydrosphingosine, and N-linoyldihydrosphingosine. The non-siliceous fatty substance (s) may be present in an amount ranging from 0.01 to 40% by weight, preferably from 0.1 to 5% by weight, relative to the total weight of the composition. The composition according to the invention may further comprise one or more silicones. The silicones present in the composition according to the invention are in particular polyorganosiloxanes which may be in the form of aqueous solutions, that is to say solubilized, or optionally in the form of dispersions or microdispersions, or B 10-2763EN 38 aqueous emulsions. The polyorganosiloxanes may also be in the form of oils, waxes, resins or gums. Organopolysiloxanes are further defined in Walter Noll's "Chemistry and Technology of Silicones" (1968) Academie Press. Silicones can be volatile or non-volatile. When they are volatile, the silicones are more particularly chosen from those having a boiling point of between 60 ° C. and 260 ° C., and even more particularly from: (i) cyclic silicones containing from 3 to 7 silicon atoms and preferably 4 to 5. It is, for example, octamethylcyclotetrasiloxane marketed in particular under the name "VOLATILE SILICONE 7207" by UNION CARBIDE or "SILBIONE 70045 V 2" by RHODIA, decamethylcyclopentasiloxane marketed under the name "VOLATILE SILICONE 7158" by UNION CARBIDE, "SILBIONE 70045 V 5" by RHODIA, and mixtures thereof. Mention may also be made of cyclocopolymers of the dimethylsiloxane / methylalkylsiloxane type, such as the "VOLATILE SILICONE FZ 3109" marketed by UNION CARBIDE, of chemical structure: CH 3 with D ": -Si-OCH 3" 3 -Si-O-1 CsH17 with D ': It is also possible to mention mixtures of cyclic silicones with organic compounds derived from silicon, such as the mixture of octamethylcyclotetrasiloxane and tetramethylsilylpentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1, 1 '(hexa-2,2,2', 2 ', 3,3'-trimethylsilyloxy) bis-neopentane. (ii) linear volatile silicones having 2 to 9 silicon atoms and having a viscosity less than or equal to 5 × 10 6 m 2 / s at 25 ° C. It is, for example, decamethyltetrasiloxane marketed in particular under the name "SH 200" by the company TORAY SILICONE. Silicones included in this class are also described in the article published in Cosmetics and toiletries, Vol. 91, Jan. 76, p. 27-32 - TODD & BYERS "Volatile Silicone fluids for cosmetics". When the silicones are nonvolatile, polyalkylsiloxanes, polyarylsiloxanes, polyalkylarylsiloxanes, silicone gums and resins, polyorganosiloxanes modified with organofunctional groups and their mixtures are preferably used. These silicones are more particularly chosen from polyalkylsiloxanes, among which, for example, polydimethylsiloxanes containing trimethylsilyl end groups (dimethicone according to the CTFA name) having a viscosity of 5 × 10 -6 to 2.5 m 2 / s at 25 ° C. and preferably 1 × 10 .5 to 1 m2 / s. The viscosity of the silicones is, for example, measured at 25 ° C. according to ASTM 445 Appendix C. Among these polyalkylsiloxanes, mention may be made, without limitation, of the following commercial products: - SILBIONE oils of the 47 and 70 047 series or oils MIRASIL marketed by RHODIA such as, for example, 70 047 V 500 000 oil, MIRASIL series oils marketed by RHODIA, 200 series oils from Dow Corning, such as more particularly DC200. viscosity 60 000 Cst, - VISCASIL oils from the company GENERAL ELECTRIC and some oils SF series (SF 96, SF 18) from the company GENERAL ELECTRIC. Mention may also be made of polydimethylsiloxanes with dimethylsilanol end groups (Dimethiconol according to the CTFA name), such as the oils of the 48 series from the company Rhodia.

It is also possible to mention polydimethylsiloxanes containing aminoethyl, aminopropyl and alpha-omega silanol groups. In this class of polyalkylsiloxanes, mention may also be made of the products sold under the names "ABIL WAX 9800 and 9801" by GOLDSCHMIDT, which are poly (C1-C20) alkylsiloxanes. The polyalkylarylsiloxanes are particularly chosen from polydimethyl methylphenylsiloxanes and linear and / or branched polydimethyl diphenylsiloxanes with a viscosity of from 1 × 10 -5 to 5 × 10 -2 m 2 / s at 25 ° C. Among these polyalkylarylsiloxanes, mention may be made, by way of example, of the products sold under the following names: SILBIONE oils of the 70 641 series from RHODIA; oils of RHODORSIL 70 633 and 763 series from RHODIA - DOW CORNING 556 COSMETIC GRAD FLUID oil from Dow Corning, - Silicones from the PK series from Bayer as the PK20 product, - Silicones from the PN, PH series from the Bayer company, such as PN1000 products and PH1000, certain oils of SF series of the company GENERAL ELECTRIC such as SF 1023, SF 1154, SF 1250, SF 1265. The silicone gums that may be present in the composition according to the invention are especially polydiorganosiloxanes having average molecular weights in large numbers between 200 000 and 1 000 000, used alone or mixed in a solvent. This solvent may be chosen from volatile silicones, polydimethylsiloxane (PDMS) oils, polyphenylmethylsiloxane (PPMS) oils, isoparaffins, polyisobutylenes, methylene chloride, pentane, dodecane, tridecanes or their mixtures.

The following products may be mentioned more particularly: polydimethylsiloxane gums, polydimethylsiloxane / methylvinylsiloxane gums, polydimethylsiloxane / diphenylsiloxane gums, polydimethylsiloxane / phenylmethylsiloxane gums, polydimethylsiloxane / diphenylsiloxane gums / methylvinylsiloxane. More particularly useful products are the following mixtures: - mixtures formed from a hydroxylated polydimethylsiloxane at the end of the chain (called dimethiconol according to the CTFA dictionary nomenclature) and a cyclic polydimethylsiloxane (called cyclomethicone according to the CTFA dictionary nomenclature ) such as the product Q2 1401 sold by the company Dow Corning, the mixtures formed from a polydimethylsiloxane gum with a cyclic silicone such as the product SF 1214 Silicone Fluid from the company General Electric, this product is an SF 30 gum corresponding to a dimethicone, having a number-average molecular weight of 500,000, solubilized in SF 1202 Silicone Fluid oil corresponding to decamethylcyclopentasiloxane, - blends of two PDMSs of different viscosities, and more particularly of a PDMS gum and of a PDMS oil, such as the product SF 1236 from the company General Electric. The product SF 1236 is the mixture of an SE 30 gum defined above having a viscosity of 20 m 2 / s and an SF 96 oil with a viscosity of 5 × 10 -6 m 2 / s. This product preferably comprises 15% of SE 30 gum and 85% of an SF 96 oil. The organopolysiloxane resins optionally present in the composition according to the invention are crosslinked siloxane systems containing the units: RzSiOziz, R3SiOliz, RSiO3i2 and SiO4i2 in which R represents a hydrocarbon group having 1 to 16 carbon atoms or a phenyl group. Among these products, those particularly preferred are those in which R denotes a C 1 -C 4 alkyl group, more particularly methyl, or a phenyl group. Among these resins may be mentioned the product sold under the name "Dow Corning 593" or those sold under the names "Silicone Fluid SS 4230 and SS 4267" by the company General Electric and which are silicones of dimethyl / trimethyl siloxane structure. Mention may also be made of the trimethylsiloxysilicate type resins sold in particular under the names X22-4914, X21-5034 and X21-5037 by the company Shinetsu. The organomodified silicones optionally present in the composition according to the invention are silicones as defined above and comprising in their structure one or more organofunctional groups attached via a hydrocarbon group. Among the organomodified silicones, mention may be made of polyorganosiloxanes comprising: polyethyleneoxy and / or polypropyleneoxy groups optionally comprising C 6 -C 24 alkyl groups such as the products called dimethicone copolyol marketed by the company Dow Corning under the name DC 1248 or the oils SILWET L 722, L 7500, L 77, L 711 of the company UNION CARBIDE and the alkyl (C12) methicone copolyol marketed by the company Dow Corning under the name Q2 5200, thiol groups such as the products sold under the names " GP 72 A "and" GP 71 "from the company GENESEE, - alkoxylated groups such as the product marketed under the name" SILICONE COPOLYMER F-755 "by SWS SILICONES and ABIL WAX 2428, 2434 and 2440 by the company GOLDSCHMIDT, - hydroxyl groups such as the hydroxyalkyl-functional polyorganosiloxanes described in the French patent application FR-A-2 589 476, B 10 Acyloxyalkyl groups such as, for example, the polyorganosiloxanes described in US-A-4957732, anionic groups of the carboxylic type, for example in the products described in the company's patent EP 186 507; CHISSO CORPORATION, or alkylcarboxylic type such as those present in the product X-22-3701E from Shinetsu; 2-hydroxyalkylsulfonate; 2-hydroxyalkylthiosulphate, such as the products sold by the company GOLDSCHMIDT under the names "ABIL 5201" and "ABIL 5255", hydroxyacylamino groups, such as the polyorganosiloxanes described in application EP 342 834. For example, the product Q2- 8413 from the company Dow Corning. Among the organomodified silicones, mention may also be made of amino silicones.

Amino silicone means any silicone comprising at least one primary, secondary, tertiary amine or a quaternary ammonium group. The amino silicones optionally used in the cosmetic composition according to the present invention are chosen from: (a) the compounds corresponding to the following formula (XIV):

(R1) a (T) 3a-S1 [OS1 (T) 2] n- [OS1 (T) b (R1) 2b] m-OS1 (T) 3-a- (R1) a (XIV) in which: T is a hydrogen atom, or a phenyl group, hydroxyl (-OH), or C1-C8 alkyl, and preferably methyl, or C1-C8 alkoxy, preferably methoxy, a denotes the number 0 or a number integer from 1 to 3, and preferably 0, b denotes 0 or 1, and in particular 1, m and n are numbers such that the sum (n + m) may vary in particular from 1 to 2,000 and in particular from 50 at 150, n being able to denote a number from 0 to 1,999 and in particular from 49 to 149 and m possibly denoting a number from 1 to 2,000, and in particular from 1 to 10, R1 is a monovalent radical of formula -CgH2gL wherein q is a number from 2 to 8 and L is an optionally quaternized amino group selected from the groups: - N (R2) -CH2-CH2-N (R2) 2, - N (R2) z, - N + (R 2) 3 Q, - N + (R 2) (H) z Q-, -N + (R 2) 2HQ-, - N (R 2) -CH 2 -CH 2 -N + (R 2) (H) 2 Q-, in which R 2 may designate a hydrogen atom, a phenyl group, a benzyl group, or a monovalent saturated hydrocarbon group, for example a C1-C20 alkyl group, and Q- represents a halide ion such as, for example, fluoride, chloride, bromide or iodide. In particular, the amino silicones corresponding to the definition of formula (XIV) are chosen from the compounds corresponding to the following formula (XV): ## STR2 ## in which R, R ' , R ", identical or different, denote a C 1 -C 4 alkyl group, preferably CH 3, a C 1 -C 4 alkoxy group, preferably methoxy, or OH, A represents an alkylene group, linear B 10-2763FR 45 or branched, C3-C8, preferably C3-C6, m and n are integers dependent on the molecular weight and whose sum is between 1 and 2000. According to a first possibility, R, R 'and R ", identical or different, each represents a C1-C4 alkyl or hydroxyl group, A represents a C3 alkylene group and m and n are such that the weight average molecular weight of the compound is from about 5,000 to about 500,000. this type are referred to in the CTFA dictionary as "amodimethicone".

According to a second possibility, R, R 'and R ", which are identical or different, each represent a C1-C4 alkoxy or hydroxyl group, at least one of the R or R" groups is an alkoxy group and A represents an alkylene group. in C3. The hydroxyl / alkoxy molar ratio is preferably between 0.2 / 1 and 0.4 / 1 and advantageously equal to 0.3 / 1. Moreover, m and n are such that the weight average molecular weight of the compound is between 2000 and 106. More particularly, n is between 0 and 999 and m is between 1 and 1000, the sum of n and m being between 1 and 1000.

In this category of compounds, mention may be made, inter alia, of the Belsil®ADM 652 product marketed by WACKER. According to a third possibility, R and R ", each different, represent a C1-C4 alkoxy or hydroxyl group, at least one of the groups R and R" being an alkoxy group, R 'representing a methyl group and A representing a C3 alkylene group. The molar ratio of hydroxy / alkoxy is preferably between 1 / 0.8 and 1 / 1.1, and advantageously is equal to 1 / 0.95. Furthermore, m and n are such that the weight average molecular weight of the compound is between 2000 and 200000. More particularly, n is between 0 and 999 and m is between 1 and 1000, the sum of n and m being between 1 and 1000. More particularly, there may be mentioned the product F1uidWR® 1300, sold by the company Wacker.

It should be noted that the molecular mass of these silicones is determined by gel permeation chromatography (ambient temperature, polystyrene standard, μ styragem columns, THF eluent, flow rate of 1 mm / m, 200 μl of a solution is injected 0.5% by weight of silicone in THF and the detection is carried out by refractometry and UV-metry). A product corresponding to the definition of formula (XIV) is in particular the polymer referred to in the CTFA dictionary "trimethylsilylamodimethicone", corresponding to the following formula (XVI): (CH 3) 3 SiO CH 3 SiO 1 CH 3 CH 3 SiO 1 CH 2 Wherein n and m are as defined above according to formula (XIV). Such compounds are described, for example, in EP 0 095 238. A compound of formula (XVI) is, for example, sold under the name Q2-8220 by the company OSI. (b) compounds having the following formula (XVII): ## STR2 ## wherein

R 3 represents a monovalent C 1 -C 18 hydrocarbon group, and in particular a C 1 -C 18 alkyl or C 2 -C 18 alkenyl group, for example methyl,

R 4 represents a divalent hydrocarbon group, in particular a C 1 -C 18 alkylene group or a divalent C 1 -C 18, for example C 1 -C 8, alkyleneoxy group,

Q- is a halide ion, especially chloride,

r represents an average statistical value of 2 to 20 and in particular 2 to 8,

s represents an average statistical value of 20 to 200 and in particular of 20 to 50.

Such compounds are described more particularly in US Patent 4185087.

A compound in this class is that sold by UNION CARBIDE under the name "Ucar Silicone ALE 56". c) the quaternary ammonium silicones of formula (XVIII) 2X-R 7 R + Si-R 6 -CH 2 -CHOH-CH 2 -NR 7 R 7 R 7 (XVIII) R 7 OH 1 + R 6 -N-CH 2 -CH-CH 2 R 6 R7 wherein R7, which may be identical or different, represents a monovalent hydrocarbon group having from 1 to 18 carbon atoms, and in particular a C1-C18 alkyl group, a C1-C8 alkenyl group or a a ring comprising 5 or 6 carbon atoms, for example methyl, R 6 represents a divalent hydrocarbon group, in particular a C 1 -C 18 alkylene group or a divalent C 1 -C 18, for example C 1 -C 8, alkyleneoxy group connected to Si by a linkage Si-C, Rg, which may be identical or different, each represent a hydrogen atom, a monovalent hydrocarbon group having 1 to 18 carbon atoms, and in particular a C 1 -C 18 alkyl group or a C 1 -C 18 alkenyl group, a group -R6-NHCOR7, X- is an anion such as a halide ion, especially chloride or an organic acid salt (acetate, ...), r represents e an average statistical value of 2 to 200 and in particular 5 to 100.

These silicones are for example described in application EP-A-0530974. d) the amino silicones of formula (XIX):

Wherein R 1, R 2, R 3 and R 4, which may be identical or different, each denote a C 1 -C 4 alkyl group or a phenyl group, - RS designates R 1 R 3 if -O 1 R 2 Si R 5 R 4 x 3 (XIX) a C1-C4 alkyl group or a hydroxyl group, n is an integer ranging from 1 to 5, m is an integer ranging from 1 to 5, and - x is chosen so that amine number is between 0.01 and 1 meq / g. Especially preferred silicones are polydimethylsiloxanes or dimethicones, and amodimethicones. When these compounds are used, a particularly interesting embodiment is their use together with cationic and / or nonionic surfactants. For example, it is possible to use the product sold under the name "Cationic Emulsion DC 939" by the company Dow Corning, which comprises, in addition to amodimethicone, a cationic surfactant which is trimethylketylammonium chloride and a non-surface-active agent. ionic compound of formula: C13H27- (OC2H4) 12-OH, known under the name CTFA "trideceth-12".

Another commercial product that can be used according to the invention is the product sold under the name "Dow Corning Q2 7224" by the company Dow Corning, comprising in combination the trimethylsilylamodimethicone of formula (XVI) described above, a nonionic surfactant of formula: C8H17-C6H4- (OCH2CH2) 40-OH, known under the name CTFA "octoxynol-40", a second nonionic surfactant of the formula: C12H25- (OCH2-CH2) 6-OH, known under the name CTFA "isolaureth-6", and propylene glycol. The silicones of the invention may also be anionic grafted silicones such as compounds VS 80 or VS 70 proposed by the company 3M. In a more preferred embodiment, the silicone is a chemically unmodified polydimethylsiloxane. The silicone or silicones may be present in contents ranging from 0.01 to 40% by weight, preferably from 0.1 to 5% by weight, relative to the total weight of the composition. The composition may further comprise one or more solid particles. Among these may be present, in the composition according to the invention, anti-dandruff agents such as zinc pyridinethione, selenium disulfide, ellagic acid, fillers, and especially silica, titanium dioxide, pigments, dyes, abrasive powders such as pumice and apricot kernel powder. The composition according to the present invention may further contain one or more reducing agents, such as, in particular, sulfur reducing agents. These are preferably chosen from organic compounds comprising one or more mercapto (-SH) groups, sulphites, and sulphite derivatives. By sulphite derivatives, bisulfites and sulphite diesters of the formula ROSO 2 R 'are defined, with R and R' denoting C 1 -C 10 alkyl groups. The organic compounds comprising a mercapto group are preferably chosen from the following compounds: thioglycolic acid, thiolactic acid, cysteine, homocysteine, glutathione, thioglycerol, thiomalic acid, 2-mercaptopropionic acid 3-mercaptopropionic acid, thiodiglycol, 2-mercaptoethanol, dithiothreitol, thioxanthine, thiosalicylic acid, thiodiglycolic acid, lipoic acid, N-acetylcysteine, esters of thioglycolic or thiolactic acids, and mixtures of these compounds. The sulfur reducing agent (s) may especially be used in the form of salts, in particular the alkali metal salts such as the sodium and potassium salts, the alkaline earth metal salts, for example the magnesium and calcium salts, ammonium salts, amine salts, aminoalcohol salts. In a particularly preferred manner, the sulfur reducing agent (s) is (are) chosen from thioglycolic acid and its salts, thiolactic acid and its salts, alkali metal sulphites and in particular sodium sulphite, alkali metal bisulfites and in particular sodium bisulfite, and the precursors of these sulfites or bisulfites such as sodium metabisulfite. The sulfur reducing agent (s) may be present in an amount ranging from 0.1 to 5% by weight, preferably from 0.3 to 3% by weight, relative to the total weight of the composition.

The composition according to the present invention may further comprise at least one oxidizing agent. Such an oxidizing agent is preferably selected from the group consisting of hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, persalts such as perborates and persulfates. The use of hydrogen peroxide is particularly preferred. According to a preferred embodiment, the composition according to the invention may further comprise one or more cationic polymers. The composition according to the invention may be aqueous or anhydrous. Anhydrous is understood to mean a composition without added water, that is to say a composition whose water, if present, comes only from the water of crystallization or adsorption of the raw materials. In any case, an anhydrous composition contains less than 5% by weight of water and better still less than 1% by weight of water, relative to the total weight of the composition. Whether anhydrous or aqueous, the composition according to the invention may contain one or more organic solvents which are liquid at room temperature (25 ° C.) and at atmospheric pressure (760 mmHg). Preferably, the liquid organic solvent (s) is (are) chosen from C1-C4 lower alcohols, such as ethanol, isopropanol, tert-butanol or n-butanol; polyols such as propylene glycol; polyol ethers; C5-C10 alkanes; C3-C4 ketones such as acetone and methyl ethyl ketone; C1-C4 alkyl acetates such as methyl acetate, ethyl acetate and butyl acetate; dimethoxyethane, diethoxyethane, silicone oils and non-siliceous liquid fatty substances described above; and their mixtures. When the composition of the invention is aqueous, its pH is generally between 2 and 9, and in particular between 3 and 8. It is preferably less than 7, more preferably 3 to 6. 2966354 B 10-2763EN

It can be adjusted to the desired value by means of acidifying or alkalizing agents usually used in cosmetics for this type of application or else using conventional buffer systems.

Acidifying agents include, by way of example, organic or inorganic acids as described above.

Among the alkalinizing agents, mention may be made, for example, of ammonia, alkaline carbonates, alkanolamines such as mono-, di- and triethanolamines and their derivatives, hydroxides

10 of sodium or potassium and the compounds of the following formula: Ra. Wherein W is a propylene residue optionally substituted with a hydroxyl group or a C1-C4 alkyl radical; Ra, Rb, Rc and Rd,

The same or different, represent a hydrogen atom, a C1-C4 alkyl radical or a C1-C4 hydroxyalkyl radical.

The compositions according to the invention may also contain one or more additives chosen from fixing polymers, pseudo-ceramides, vitamins and pro-vitamins including panthenol,

Water-soluble and fat-soluble sunscreens, silicone or non-silicone, pearlescent and opacifying agents, sequestering agents, conditioning agents other than the silicones and cationic polymers mentioned above, solubilizing agents, antioxidants, agents dandruff different from those

Mentioned above, antiseborrhoeic agents, agents for preventing and / or regrowing hair, penetrating agents, perfumes, peptizers, preservatives, and any other additive conventionally used in the cosmetics field.

These additives may be present in the composition according to the invention in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

The skilled person will take care to choose these optional additives and their amounts so that they do not adversely affect the properties of the compositions of the present invention. The present invention also relates to a cosmetic hair treatment method, which consists in applying to the hair an effective amount of a composition as described above. This application is optionally followed or not by a rinse.

When the application of the composition is followed by rinsing, the exposure time of the composition on the keratin materials ranges from a few seconds to 60 minutes, better from 5 seconds to 30 minutes, even better from 10 seconds to 10 minutes. Whether in rinsed mode or in rinsed mode, the application of the composition can be done in the presence of heat. The heater may be a hair dryer, a helmet, a round or flat iron. The heating temperature can be between 40 and 220 ° C. The application of the composition according to the invention to hair can be done on dry hair or wet hair. It can in particular be carried out after shampooing or after pretreatment at acidic or basic pH. The following examples serve to illustrate the invention without being limiting in nature.

Examples In the following examples, all the quantities are indicated as a percentage by weight of active material relative to the total weight of the composition.

Example 1 The following compositions were prepared with the ingredients indicated in the following table.

Fatty chain alkoxysilane of formula 10% (1) (1) Acid (2) 2% Sodium hydroxide Qs pH 3 Water Qs 100% (1) The alkoxysilane of formula (I) is selected from the group consisting of: octyltriethoxysilane, dodecyltriethoxysilane, octadecyltriethoxysilane, and hexadecyltriethoxysilane (2) the acid is selected from citric acid, lactic acid, malic acid, acetic acid, succinic acid, aspartic acid, phosphoric acid and hydrochloric acid.

EXAMPLE 2 A composition according to the invention (composition A) is compared with a comparative composition (composition B) comprising no organic acid. Composition A according to the invention and comparative composition B were prepared from the ingredients indicated in the table below.

B 10-2763EN 55 AB Octyltriethoxysilane (1) 10% - Hydroxyethylcellulose (HEC) (2) 0.6% 0.6% Lactic acid (3) 2% - Sodium hydroxide (4) qs pH 3.5 qs pH 3 , Water qs 100% qs 100% (1) sold under the trademark DYNASYLAN OCTEO by EVONIK (2) sold under the trademark NATROSOL 250 HHR by the company PC, ASHLAND (3) sold under the trademark PURAC FCC 80 by the company PURAC (4) Liquid caustic soda 30%, sold by the company ARKEMA Treatment The above compositions were tested on a panel of ten women with colored hair. 8 g of each of these compositions were applied at room temperature per half-head. The application was done on damp hair after shampooing.

Results: - Sensory analysis: A panel of experts then carried out a comparative evaluation between compositions A and B, assigning a score ranging from 0 (low) to 5 (very good) for each of the cosmetic properties of wet hair, listed in the table below. The averages of the scores obtained for each property studied are as follows: B 10-2763EN 56 Composition AB Detangling 4.5 3.7 Flexibility 3.5 2.7 Smoothing 4.4 3.8 Delays 4.4 3.8 These results show that the treatment with the composition A of the invention provides greater ease of disentangling, flexibility, smoothing and hairline hairline.

A shampoo persistence study of the cosmetic effects observed at application was also performed. A panel of experts carried out a comparative evaluation as to the durability of the cosmetic properties obtained with compositions A and B on damp hair. This evaluation was performed using the same notation system as before for the same properties. The averages of these notes are summarized in the table below.

Composition AB Untangling 4.2 3.5 Flexibility 3.2 2.7 Smoothing 4.0 3.0 Delays 4.0 3.0 These results show that the performance of composition A, according to the invention, is persistent and remains always superior to the performances obtained immediately after application of the comparative composition B.

- Microscopic observations by Scanning Electron Microscopy: B 10-2763EN 57 Hair was visualized by scanning electron microscopy on the day of application of composition A and after thirteen shampoos. On the day of application of composition A, smooth plates were observed on the surface of the fiber. After ten shampoos, these deposits are always present on the surface of the fiber The formation and the remanence with shampoos of these deposits are responsible for the very good cosmetic properties evaluated sensory.

Claims (17)

REVENDICATIONS1. Cosmetic composition comprising: - one or more fatty-chain alkoxysilanes of formula (I) below: RS i (O Rz) 3 (1) in which R 1 represents a linear or branched alkyl or alkenyl group comprising from 7 to 18 carbon atoms, carbon, and Rz represents a linear or branched alkyl group comprising from 1 to 6 carbon atoms, and - one or more organic or inorganic acids. 2. Composition according to claim 1, characterized in that Rz represents an alkyl group comprising from 1 to 4 carbon atoms, better still a linear alkyl group comprising from 1 to 4 carbon atoms and preferably the ethyl group. 3. Composition according to claim 1 or 2, characterized in that R1 denotes an alkyl group and even more preferably a linear alkyl group. 4. Composition according to any one of claims 1 to 3, characterized in that the alkoxysilane of formula (I) is selected from octyltriethoxysilane, dodecyltriethoxysilane, octadecyltriethoxysilane and hexadecyltriethoxysilane. 5. Composition according to any one of claims 1 to 4, characterized in that the alkoxysilane of formula (I) is octyltriethoxysilane. 6. Composition according to any one of the preceding claims, characterized in that the organic or inorganic acid is an organic acid, and preferably a carboxylic acid. 7. Composition according to any one of the preceding claims, characterized in that the organic or inorganic acid is selected from acetic acid, propanoic acid, butanoic acid, lactic acid, malic acid, glycolic acid, ascorbic acid, maleic acid, phthalic acid, succinic acid, aspartic acid, taurine, tartaric acid, arginine, glycine, glucuronic acid, gluconic acid, citric acid, and preferably among acetic acid, citric acid, lactic acid, malic acid, succinic acid and aspartic acid. 8. Composition according to any one of the preceding claims, characterized in that the organic or inorganic acid is a mineral acid and preferably chosen from hydrochloric acid, orthophosphoric acid, sulfuric acid, sulphonic acids and nitric acid, and even more preferably among phosphoric acid and hydrochloric acid. 9. Composition according to any one of the preceding claims, characterized in that the organic acid or acids are present in a content expressed as free acids ranging from 0.01 to 10% by weight, preferably from 0.01 to 5% by weight, and even more preferably from 0.01 to 3% by weight, relative to the total weight of the composition. 10. Composition according to any one of the preceding claims, characterized in that the weight ratio between the amount of fatty-chain alkoxysilane (s) of formula (I) on the one hand and the amount of organic acid (s). (s) or mineral (s) on the other hand is greater than or equal to 0.1, and preferably ranges from 0.1 to 50, still more preferably from 0.5 to 20, and more preferably from 1 to 10, and better from 1 to 7. 11. Composition according to any one of the preceding claims, characterized in that it comprises one or more thickening agents, present (s) preferably in an amount of 0.1 to 20% by weight, and more preferably of 0, 2 to 10% by weight, relative to the total weight of the composition. 12. Composition according to any one of the preceding claims, characterized in that it further comprises one or more additives selected from surfactants, alkoxysilanes different from those of formula (I), nonsilicon fats, silicones, solid particles, reducing agents, and oxidizing agents. 13. Composition according to any one of the preceding claims, characterized in that it is aqueous. 14. The composition of claim 13, characterized in that the pH is less than 7, more preferably from 3 to 6. 15. Composition according to any one of claims 1 to 12, characterized in that it is anhydrous. 16. A method of cosmetic treatment of hair, characterized in that it consists in applying to the hair an effective amount of a composition according to any one of claims 1 to 15, and then to perform or not rinse after a possible time. laying, with or without heat. 17. Use of the cosmetic composition according to one of claims 1 to 15 for the cosmetic treatment of hair.