WO2010026534A1

WO2010026534A1 - Cosmetic compositions containing a polymer comprising carbosiloxane dendrimer units

Info

Publication number: WO2010026534A1
Application number: PCT/IB2009/053827
Authority: WO
Inventors: Pascal Arnaud; Euriel Clavel
Original assignee: L'oreal
Priority date: 2008-09-04
Filing date: 2009-09-02
Publication date: 2010-03-11
Also published as: FR2935268B1; FR2935268A1

Abstract

The present invention relates to a cosmetic composition for making up and/or caring for the skin, comprising a physiologically acceptable medium, containing at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and at least one microwax, the ratio by weight between said vinyl polymer and said microwax being greater than or equal to 1.

Description

Cosmetic compositions containing a polymer comprising carbosiloxane dendrimer units

The present invention relates to the field of care and makeup for keratin materials, in particular the skin and the mucous membranes. More particularly, the present invention relates to compositions for conferring an effect of mattness and exhibiting an improved staying power over time of the mattness.

Cosmetic compositions, such as, for example, foundations, are commonly used to give the skin, in particular the face, color and an esthetic effect. These makeup products generally contain oils, pigments, fillers and, optionally, additives such as cosmetic or dermatological active agents. It is known to those skilled in the art to use fillers to obtain a mattness effect.

These fillers are most commonly selected according to their good properties of sebum absorption and/or to their ability to scatter light. However, their adhesion to the skin is generally weak, especially in the presence of sebum.

Film-forming polymers can then be used to improve the adhesion of these fillers, and to increase the staying power of the mattness effect over the course of the day.

These polymers are of very different chemical natures and can be carried in the fatty phase or in the aqueous phase. By way of examples of these polymers, mention may be made of silicone resins, polyacrylates, latices, etc.

Thus, US 6,887,859 describes skin care and makeup compositions containing a combination of film- forming polymers and fillers.

While these formulations actually make it possible to confer certain mattness staying power properties on the cosmetic compositions, said properties may however be accompanied by unpleasant sensations and discomfort either during application of the product (difficult to spread, tacky effect, greasy feeling, etc.) or over the course of the day (tautness, mask effect, etc.).

WO2006058793 and EP 1 862 162 also describe cosmetic compositions containing a vinyl polymer comprising carbosiloxane-dendrimer-derived units and fillers.

However, there remains the need for cosmetic compositions exhibiting a mattness and an improved mattness staying power, which are pleasant and easy to apply, while at the same time conserving satisfactory application comfort, i.e. not having a feeling of tautness or a mask effect throughout the day and/or not inducing a greasy or tacky feeling when applied. The object of the present invention is to meet these needs.

The present invention relates to a cosmetic composition for making up and/or caring for the skin, comprising a physiologically acceptable medium containing at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and at least one microwax, the ratio by weight between said polymer and said microwax being greater than or equal to 1.

Unexpectedly, the inventors have observed that the introduction, into a composition for making up and/or caring for the skin, of a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit in combination with a microwax makes it possible to confer very good mattness staying power properties on these compositions while at the same time maintaining satisfactory comfort on application. What is more, these compositions remain pleasant to wear throughout the day.

Up until now, it had never been shown that a combination of a polymer and of a microwax in accordance with the invention, in a weight ratio as required, made it possible to confer mattness and improved mattness staying power on cosmetic compositions while at the same time conferring, in a very satisfactory manner, comfortable feeling during application of the composition and during its use throughout the day.

As shown by the examples detailed hereafter, the specific selection of paraffin microwax as filler and its combination with at least one carbosiloxane-dendrimer-derived unit in a weight ratio polymer/paraffin microwax greater than or equal to 1 allow conferring to the compositions improved properties in terms of mattness and staying power of mattness.

Without wishing to be bound by any theory, the inventors have observed that, when the content of a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit is less than that of the microwax, the mattness staying power is not as good, and when the amount of polymer is too high compared with that of the microwax, the cosmetic properties are degraded, in particular the comfort and sticking properties.

A subject of the present invention is also the use, in a cosmetic composition for making up and/or caring for the skin, of at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit in combination with at least one microwax in a ratio by weight of greater than or equal to 1 , so as to confer on said composition an improved mattness staying power. The present invention also relates to a nontherapeutic method for making up and/or caring for the skin, comprising at least the step of applying, to said skin, at least one layer of a composition according to the invention.

A cosmetic composition of the invention may be in the form of a foundation, a hot-cast foundation product, a lipstick, a body makeup product, a concealer product or an eye shadow. It may be in the form of an anhydrous gel, in the form of a stick or a rod or in the form of a soft paste.

A composition of the invention may comprise water or a hydrophilic phase, and may then in particular be in the form of an oil- in- water or water-in-oil emulsion or a W/O/W or 0/W/O multiple emulsion, in particular when it is a foundation or a tinted cream.

A care composition according to the invention may in particular be a suntan product or deodorant.

MATTNESS AND MATTNESS STAYING POWER

The mattness and the mattness staying power can be measured by means of the protocol described below.

The mattness of a region of the skin, for example of the face, is measured using a polarimetric camera, which is a black and white polarimetric imaging system with which parallel (P) and crossed (C) polarized light images are acquired.

By analyzing the image resulting from the subtraction of the two images (P-C), shine is quantified by measuring the mean level of gray of the 5% of most shiny pixels corresponding to the regions of shine.

More specifically, the measurements are carried out on a panel of individuals, for example, a sample of 16 women, who are kept in an air-conditioned (22°C +/- 2°C) waiting room for 15 min before the start of the test. They remove their makeup and an image of one of their cheeks is acquired with the polarimetric camera. This image makes it possible to measure the shine at TO before applying makeup. Approximately 100 mg of cosmetic composition are then weighed out into a watchglass, and are applied, with the bare fingers, to the half of the face on which the measurement at TO was carried out.

After a drying time of 15 min, an image of the made-up cheek is acquired with the polarimetric camera. This image makes it possible to measure the shine just after applying makeup (Timm). The models then return to the air-conditioned room for 3 h.

Finally, an image of the made-up cheek after 3 h of waiting is acquired with the polarimetric camera. This image makes it possible to measure the shine after 3 h of wearing makeup (T3h). The results are expressed by calculating the difference (Timm - TO) which measures the effect of the makeup. A negative value signifies that the makeup reduces the shine of the skin and that it is therefore mattifying.

The difference (T3h - Timm) measuring the staying power of this effect is then calculated. The value obtained should be as low as possible, thereby signifying that the mattness of the makeup does not change over time.

VINYL POLYMER GRAFTED WITH A CARBOSILOXANE DENDRIMER

A vinyl polymer suitable for the preparation of a composition according to the invention comprises at least one carbosiloxane-dendrimer-derived unit.

The vinyl polymer may have, in particular, a backbone and at least one side chain, which comprises a carbosiloxane-dendrimer-derived unit having a carbosiloxane dendrimer structure.

The term "carbosiloxane dendrimer structure" in the context of the present invention represents a molecular structure possessing branched groups having high molecular masses, said structure having a high regularity in the radial direction starting from the linkage to the backbone. Such carbosiloxane dendrimer structures are described in the form of a highly branched siloxane-silylalkylene copolymer in the Japanese patent application made available to public inspection Kokai 9-171 154. A vinyl polymer according to the invention may contain carbosiloxane- dendrimer-derived units which can be represented by the following general formula:

in which R¹ represents an aryl group or an alkyl group having from 1 to 10 carbon atoms, and X¹ represents a silylalkyl group which, when i = 1, is represented by the formula:

in which R¹ is as defined above, R² represents an alkylene group having from 2 to 10 carbon atoms, R³ represents an alkyl group having from 1 to 10 carbon atoms, X¹⁺¹ represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or the silylalkyl group as defined above with i = i + 1; i is an integer from 1 to 10 which represents the generation of said silylalkyl group, and a¹ is an integer from 0 to 3; Y represents a radical-polymerizable organic group selected from: organic groups containing a methacrylic group or an acrylic group and which are represented by the formulae:

and

in which R⁴ represents a hydrogen atom or an alkyl group, R⁵ represents an alkylene group having from 1 to 10 carbon atoms, such as a methylene group, an ethylene group, a propylene group or a butylene group, the methylene group and the propylene group being preferred; and organic groups containing a styryl group and which are represented by the formula:

in which R⁶ represents a hydrogen atom or an alkyl group, R⁷ represents an alkyl group having from 1 to 10 carbon atoms, such as a methyl group, an ethyl group, a propyl group or a butyl group, the methyl group being preferred, R⁸ represents an alkylene group having from 1 to 10 carbon atoms, such as a methylene group, an ethylene group, a propylene group or a butylene group, the ethylene group being preferred, b is an integer from 0 to 4, and c is 0 or 1 such that, if c is 0, -(R⁸)_c- represents a bond. According to one embodiment, R¹ may represent an aryl group or an alkyl group having from 1 to 10 carbon atoms. The alkyl group may preferably be represented by a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, an isopropyl group, an isobutyl group, a cyclopentyl group or a cyclohexyl group. The aryl group may preferably be represented by a phenyl group and a naphthyl group. Methyl and phenyl groups are more particularly preferred, and the methyl group is preferred above all.

A vinyl polymer having at least one carbosiloxane-dendrimer-derived unit has a molecular side chain containing a carbosiloxane dendrimer structure, and can be derived from the polymerization:

(A) of 0 to 99.9 parts by weight of a vinyl monomer; and

(B) of 100 to 0.1 parts by weight of a carbosiloxane dendrimer containing a radical- polymerizable organic group, represented by the general formula:

in which Y represents a radical-polymerizable organic group, R¹ represents an aryl group or an alkyl group having from 1 to 10 carbon atoms, and X¹ represents a silylalkyl group which, when i = 1, is represented by the formula:

in which R¹ is as defined above, R² represents an alkylene group having from 2 to 10 carbon atoms, R³ represents an alkyl group having from 1 to 10 carbon atoms, X¹⁺¹ represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or the silylalkyl group as defined above with i = i + 1; i is an integer from 1 to 10 which represents the generation of said silylalkyl, and a¹ is an integer from 0 to 3; where said radical-polymerizable organic group contained in the component (B) is selected from: organic groups containing a methacrylic group or an acrylic group and which are represented by the formulae: C

H₂ _τj 5 and

CHa °* C C-NH' — R³— in which R⁴ represents a hydrogen atom or an alkyl group, R⁵ represents an alkylene group having from 1 to 10 carbon atoms; and

- organic groups containing a styryl group and which are represented by the formula:

in which R⁶ represents a hydrogen atom or an alkyl group, R⁷ represents an alkyl group having from 1 to 10 carbon atoms, R⁸ represents an alkylene group having from 1 to 10 carbon atoms, b is an integer from 0 to 4, and c is 0 or 1, such that, if c is 0, -(R⁸)_c- represents a bond.

The monomer of vinyl type that is the component (A) in the vinyl polymer is a monomer of vinyl type which contains a radical-polymerizable vinyl group. There is no particular limitation as regards such a monomer. The following are examples of this vinyl-type monomer: methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, or a methacrylate of a lower alkyl analog; glycidyl methacrylate; butyl methacrylate, butyl acrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, octyl methacrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate, or a higher- analog methacrylate; vinyl acetate, vinyl propionate, or a vinyl ester of a lower fatty acid analog; vinyl caproate, vinyl 2-ethylhexoate, vinyl laurate, vinyl stearate, or an ester of a higher fatty acid analog; styrene, vinyltoluene, benzyl methacrylate, phenoxyethyl methacrylate, vinylpyrrolidone, or similar vinyl aromatic monomers; methacrylamide, N- methylolmethacrylamide, N-methoxymethylmethacrylamide, isobutoxymethoxy- methacrylamide, N,N-dimethylmethacrylamide, or similar monomers of vinyl type containing amide groups; hydroxyethyl methacrylate, hydroxypropyl methacrylate, or similar monomers of vinyl type containing hydroxyl groups; acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid, or similar monomers of vinyl type containing a carboxylic acid group; tetrahydrofurfuryl methacrylate, butoxyethyl methacrylate, ethoxydiethylene glycol methacrylate, polyethylene glycol methacrylate, polypropylene glycol mo no methacrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, 2- ethylhexyl vinyl ether, or a similar monomer of vinyl type with ether bonds; methacryloxypropyltrimethoxysilane, polydimethylsiloxane containing a methacrylic group on one of its molecular ends, polydimethylsiloxane containing a styryl group on one of its molecular ends, or a similar silicone compound containing unsaturated groups; butadiene; vinyl chloride; vinylidene chloride; methacrylonitrile; dibutyl fumarate; anhydrous maleic acid; anhydrous succinic acid; methacryl glycidyl ether; an organic salt of an amine, an ammonium salt, and an alkali metal salt of methacrylic acid, of itaconic acid, of crotonic acid, of maleic acid or of fumaric acid; a radical-polymerizable unsaturated monomer containing a sulfonic acid group such as a styrenesulfonic acid group; a quaternary ammonium salt derived from methacrylic acid, such as 2-hydroxy-3- methacryloxypropyltrimethylammonium chloride; and a methacrylic acid ester of an alcohol containing a tertiary amine group, such as a methacrylic acid ester of diethylamine. Multifunctional monomers of vinyl type may also be used. The following represent examples of such compounds: trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, ethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, trimethylo lpropanetrioxyethyl methacrylate, tris(2-hydroxyethyl)isocyanurate dimethacrylate, tris(2-hydroxyethyl)isocyanurate trimethacrylate, polydimethylsiloxane capped with styryl groups containing divinylbenzene groups on both ends, or similar silicone compounds containing unsaturated groups.

A carbosiloxane dendrimer, which is the component (B), can be represented by the following formula:

in which Y represents a radical-polymerizable organic group as defined above.

The following represent the preferred examples of a radical-polymerizable organic group Y: an acryloxymethyl group, a 3-acryloxypropyl group, a methacryloxymethyl group, a 3-methacryloxypropyl group, a 4-vinylphenyl group, a 3- vinylphenyl group, a 4-(2-propenyl)phenyl group, a 3-(2-propenyl)phenyl group, a 2-(4- vinylphenyl) ethyl group, a 2-(3-vinylphenyl)ethyl group, a vinyl group, an allyl group, a methallyl group and a 5-hexenyl group.

R¹ is as defined above.

X¹ represents a silylalkyl group which is represented by the following formula, when i is equal to one:

in which R¹ is as defined above.

R² represents an alkylene group having from 2 to 10 carbon atoms, such as an ethylene group, a propylene group, a butylene group, a hexylene group, or a similar linear alkylene group; a methylmethylene group, a methylethylene group, a 1-methylpentylene group, a 1 ,4-dimethylbutylene group, or a similar branched alkylene group.

Ethylene, methylethylene, hexylene, 1-methylpentylene and 1,4- dimethylbutylene groups are preferred above all.

R represents an alkyl group having from 1 to 10 carbon atoms, such as methyl, ethyl, propyl, butyl and isopropyl groups.

X¹⁺¹ represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or the silylalkyl group with i = i + 1. a¹ is an integer from 0 to 3, an i is an integer from 1 to 10 which indicates the generation number, which represents the number of repetitions of the silylalkyl group. For example, when the generation number is equal to one, the carbosiloxane dendrimer may be represented by the first general formula shown below, in which Y, R¹, R² and R³ are as defined above, R¹² represents a hydrogen atom or is identical to R¹; a¹ is identical to a¹. Preferably, the mean total number of OR³ groups in a molecule is within the range from 0 to 7. When the generation number is equal to 2, the carbosiloxane dendrimer may be represented by the second general formula shown below, in which Y, R¹, R², R³ and R¹² are the same as defined above; a¹ and a² represent the a¹ of the indicated generation. Preferably, the mean total number of OR³ groups in a molecule is in the range from 0 to 25.

When the generation number is equal to 3, the carbosiloxane dendrimer is represented by the third general formula shown below, in which Y, R¹, R², R³ and R¹² are the same as defined above; a¹, a² and a³ represent the a¹ of the indicated generation. Preferably, the mean total number of OR³ groups in a molecule is in the range from 0 to 79.

A carbosiloxane dendrimer that contains a radical-polymerizable organic group may be represented by the following mean structural formulae:

The carbosiloxane dendrimer may be produced according to the process for producing a branched silalkylene siloxane described in Japanese patent application Hei 9- 171 154.

For example, it may be prepared by subjecting an organosilicon compound containing a hydrogen atom linked to a silicon atom, represented by the following general formula:

and an organosilicon compound containing an alkenyl group, to a hydrosilylation reaction.

In the above formula, the organosilicon compound may be represented by 3- methacryloxypropyltris(dimethylsiloxy)silane, 3-acryloxypropyltris- may be selected from polymers such that the carbosiloxane-dendrimer-derived unit is (dimethylsiloxy)silane, and 4-vinylphenyltris(dimethylsiloxy)silane. The organosilicon compound that contains an alkenyl group may be represented by vinyltris(trimethylsiloxy)silane, vinyltris(dimethylphenylsiloxy)silane, and 5-hexenyltris(trimethylsiloxy)silane.

The hydrosilylation reaction is carried out in the presence of a chloroplatinic acid, a complex of vinylsiloxane and of platinum, or a similar transition metal catalyst.

A vinyl polymer having at least one carbosiloxane-dendrimer-derived unit may be selected from polymers such that the unit of a derivative of a carbosiloxane dendrimer is a carbosiloxane dendrimer structure represented by formula (I):

in which Z is a divalent organic group, "p" is 0 or 1, R¹ is an aryl or alkyl group having from 1 to 10 carbon atoms and X¹ is a silylalkyl group represented by formula (II):

in which R¹ is as defined above, R² is an alkylene group having from 1 to 10 carbon atoms, R³ is an alkyl group having from 1 to 10 carbon atoms, and X¹⁺¹ is a group selected from the group comprising hydrogen atoms, aryl groups and alkyl groups having up to 10 carbon atoms, and silylalkyl groups X¹ where the "i" is an integer from 1 to 10 indicating the generation of the silylalkyl group beginning in each carbosiloxane dendritic structure with a value of 1 for the X¹ group in formula (I) and the index "a¹" is an integer from 0 to 3.

In a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit, the polymerization ratio between the components (A) and (B), in terms of the weight ratio between (A) and (B), may be within a range from 0/100 to 99.9/0.1 , or even from 0.1/99.9 to 99.9/0.1, and preferably within a range from 1/99 to 99/1. A ratio between the components (A) and (B) of 0/100 means that the compound becomes a homopolymer of component (B).

A vinyl polymer having at least one carbosiloxane-dendrimer-derived unit may be obtained by copolymerization of the components (A) and (B), or by polymerization of the component (B) alone.

The polymerization may be a free-radical polymerization or an ionic polymerization, but free-radical polymerization is preferred.

The polymerization may be carried out by bringing about a reaction between the components (A) and (B) in a solution for a period of from 3 to 20 hours in the presence of a radical initiator at a temperature of from 50⁰C to 150⁰C. A suitable solvent for this purpose is hexane, octane, decane, cyclohexane or a similar aliphatic hydrocarbon; benzene, toluene, xylene or a similar aromatic hydrocarbon; diethyl ether, dibutyl ether, tetrahydrofuran, dioxane, or similar ethers; acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, or similar ketones; methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate or similar esters; methanol, ethanol, isopropanol, butanol or similar alcohols; octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, hexamethyldisiloxane, octamethyltrisiloxane or a similar organosiloxane oligomer.

A radical initiator may be any compound known in the art for standard free- radical polymerization reactions. The specific examples of such radical initiators are 2,2'- azobis(isobutyronitrile), 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis(2,4- dimethylvaleronitrile) or similar compounds of azobis type; benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexanoate or a similar organic peroxide. These radical initiators may be used alone or in a combination of two or more. The radical initiators may be used in an amount of from 0.1 to 5 parts by weight per 100 parts by weight of the components (A) and (B). A chain-transfer agent may be added. The chain-transfer agent may be 2-mercaptoethanol, butyl mercaptan, n-dodecyl mercaptan, 3-mercaptopropyltrimethoxysilane, a polydimethylsiloxane containing a mercaptopropyl group, or a similar compound of mercapto type; methylene chloride, chloroform, carbon tetrachloride, butyl bromide, 3-chloropropyltrimethoxysilane or a similar halogenated compound.

In the production of the polymer of vinyl type, after polymerization, the residual unreacted vinyl monomer may be removed under conditions of heating under vacuum. To facilitate the preparation of the mixture of the starting material of cosmetic products, the number-average molecular mass of the vinyl polymer containing a carbosiloxane dendrimer may be selected within the range of between 3000 and 2 000 000, preferably between 5000 and 800 000. It may be a liquid, a gum, a paste, a solid, a powder or any other form. The preferred forms are solutions constituted of the dilution, in solvents, of a dispersion or of a powder.

The vinyl polymer may be a dispersion of a polymer of vinyl type having a carbosiloxane dendrimer structure in its side molecular chain, in a liquid such as a silicone oil, an organic oil, an alcohol or water.

The silicone oil may be a dimethylpolysiloxane with the two molecular ends capped with trimethylsiloxy groups, a copolymer of methylphenylsiloxane and of dimethylsiloxane having the two molecular ends capped with trimethylsiloxy groups, a copolymer of methyl-3,3,3-trifluoropropylsiloxane and of dimethylsiloxane having the two molecular ends capped with trimethylsiloxy groups, or similar unreactive linear silicone oils, and also hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclo- pentasiloxane, dodecamethylcyclohexasiloxane, or a similar cyclic compound. In addition to the unreactive silicone oils, modified polysiloxanes containing functional groups such as silanol groups, amino groups and poly ether groups on the ends or within the side molecular chains may be used.

The organic oils may be isododecane, liquid paraffin, isoparaffin, hexyl laurate, isopropyl myristate, myristyl myristate, cetyl myristate, 2-octyldodecyl myristate; isopropyl palmitate, 2-ethylhexyl palmitate, butyl stearate, decyl oleate, 2-octyldodecyl oleate, myristyl lactate, cetyl lactate, lanolin acetate, stearyl alcohol, cetostearyl alcohol, oleyl alcohol, avocado oil, almond oil, olive oil, cocoa oil, jojoba oil, gum oil, sunflower oil, soybean oil, camelia oil, squalane, castor oil, cotton seed oil, coconut oil, egg yolk oil, propylene glycol monooleate, neopentyl glycol 2-ethylhexanoate, or a similar glycol ester oil; triglyceryl isostearate, the triglyceride of a fatty acid of coconut oil, or a similar oil of a polyhydric alcohol ester; polyoxyethylene lauryl ether, polyoxypropylene cetyl ether or a similar polyoxyalkylene ether.

The alcohol may be of any type that is suitable for use in combination with a cosmetic product starting material. For example, it may be methanol, ethanol, butanol, isopropanol or similar lower alcohols. A solution or a dispersion of the alcohol should have a viscosity in the range from 10 to 10⁹ mPa at 25°C. To improve the sensory use properties in a cosmetic product, the viscosity should be within the range from 100 to 5 x 10⁸ mPa.s.

The solutions and the dispersions may be readily prepared by mixing a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit with a silicone oil, and organic oil, an alcohol or water. The liquids may be present in the step of polymerization of a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit. In this case, the unreacted residual vinyl monomer should be completely removed by heat treatment of the solution or dispersion under atmospheric pressure or reduced pressure.

In the case of a dispersion, the dispersity of the polymer of vinyl type may be improved by adding a surfactant.

Such a surfactant may be hexylbenzenesulfonic acid, octylbenzenesulfonic acid, decylbenzenesulfonic acid, dodecylbenzenesulfonic acid, cetylbenzenesulfonic acid, myristylbenzenesulfonic acid or anionic surfactants such as sodium salts of these acids; octyltrimethylammonium hydroxide, dodecyltrimethylammonium hydroxide, hexadecyltrimethylammonium hydroxide, octyldimethylbenzylammonium hydroxide, decyldimethylbenzylammonium hydroxide, dioctadecyldimethylammonium hydroxide, tallow-trimethylammonium hydroxide, coconut oil-trimethylammonium hydroxide, or a similar cationic surfactant; a polyoxyalkylene alkyl ether, a polyoxyalkylenealkylphenol, a polyoxyalkylene alkyl ester, the sorbitol ester of polyoxyalkylene, polyethylene glycol, polypropylene glycol, an ethylene oxide additive of diethylene glycol trimethylnonanol, and nonionic surfactants of polyester type, and also mixtures. In addition, the solvents and the dispersions may be combined with iron oxide suitable for use with cosmetic products, or a similar pigment, and also zinc oxide, titanium oxide, silicon oxide, mica, talc or similar inorganic oxides in powder form. In the dispersion, a mean particle diameter of the polymer of vinyl type may be within a range of between 0.001 and 100 microns, preferably between 0.01 and 50 microns. This is because, outside the recommended range, a cosmetic product mixed with the emulsion will not have a nice enough feel on the skin or to the touch, or sufficient spreading properties or a pleasant feel.

A vinyl polymer contained in the dispersion or the solution may have a concentration in a range of between 0.1% and 95% by weight, preferably between 5% and 85% by weight. However, to facilitate the handling and the preparation of the mixture, the range should preferably be between 10% and 75% by weight.

A vinyl polymer suitable for the invention may also be one of the polymers described in the examples of application EP 0 963 751.

According to one preferred embodiment, a vinyl polymer grafted with a carbosiloxane dendrimer may be derived from the polymerization:

(A) of 0.1 to 99 part(s) by weight of one or more acrylate or methacrylate monomer(s); and (B) of 100 to 0.1 part(s) by weight of an acrylate or methacrylate monomer of a tri[tri(trimethylsiloxy)silylethyldimethylsiloxy]silylpropyl carbosiloxane dendrimer.

According to one embodiment, a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit may comprise a unit derived from a tri[tri(trimethy lsilo xy) sily lethy ldimethylsilo xy ] sily lpropy 1 carbosilo xane dendrimer corresponding to one of the formulae:

or

According to one preferred embodiment, a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit, used in the invention, comprises at least one butyl acrylate monomer.

According to one embodiment, a vinyl polymer may also comprise at least one organo fluorine group. Structures in which the polymerized vinyl units constitute the backbone and carbosiloxane dendritic structures and also organo fluorine groups are attached to side chains are particularly preferred.

The organofluorine groups may be obtained by replacing with fluorine atoms all or some of the hydrogen atoms of methyl, ethyl, propyl, isopropyl, butyl, iso butyl, tert- butyl, pentyl, neopentyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, hexadecyl and octadecyl groups and other alkyl groups having from 1 to 20 carbon atoms, and also alkyloxyalkylene groups having from 6 to 22 carbon atoms.

The groups represented by the formula: -(CH₂)X-(CF₂)_Y-R¹³ are suggested by way of examples of fluoroalkyl groups obtained by substituting fluorine atoms for hydrogen atoms of alkyl groups. In the formula, the index "x" is 0, 1, 2 or 3 and "y" is an integer from 1 to 20. R¹³ is an atom or a group selected from a hydrogen atom, a fluorine atom, -(CH(CFs)₂- or CF(CFs)₂. Such fluorine-substituted alkyl groups are exemplified by linear or branched polyfluoroalkyl or perfluoroalkyl groups represented by the formulae given below:

-CF₃, -C₂F₅, -nC3F7, -CF(CF₃)₂, -nC₄F₉, CF₂CF(CF₃)₂, -nC₅Fn, -nC₆F₁₃, -nC₈F₁₇, CH₂CF₃, -(CH(CF₃),, CH₂CH(CF₃)₂-CH₂(CF₂)₂F, -CH₂(CF₂)₃F, -CH₂(CF₂)₄F, CH₂(CF₂)₆F, CH₂(CF₂)₈F, -CH₂CH₂CF₃, -CH₂CH₂(CF₂)₂F, -CH₂CH₂(CF₂)₃F, -CH₂CH₂(CF₂)₄F, - CH₂CH₂(CF₂)₆F, -CH₂CH₂(CF₂)₈F, -CH₂CH₂(CF₂)₁₀F, -CH₂CH₂(CF₂)₁₂F,

CH₂CH₂(CF₂)₁₄F, -CH₂CH₂(CF₂)₁₆F, -CH₂CH₂CH₂CF₃, -CH₂CH₂CH₂(CF₂)₂F, - CH₂CH₂CH₂(CF₂)₂H -CH₂(CF₂)₄H, and -CH₂CH₂(CF₂)₃H. The groups represented by -CH₂CH₂-(CF₂)_m-CFR¹⁴-[OCF₂CF(CF₃)]_n-OC₃F₇ are suggested as fluoro alky loxyfluoro alky lene groups obtained by substituting fluorine atoms for hydrogen atoms of alkyloxyalkylene groups. In the formula, the index "m" is 0 or 1, "n" is 0, 1, 2, 3, 4 or 5, and R¹⁴ is a fluorine atom or CF₃. Such fluoroalkyloxyfluoroalkylene groups are exemplified by the perfluoroalkyloxyfluoro- alkylene groups represented by the formulae given below:

-CH₂CH₂CF(CF₃)-[OCF₂CF(CF₃)]_n-OC₃F₇, -CH₂CH₂CF₂CF₂-[OCF₂CF(CF₃)]_n-OC₃F₇. The number-average molecular weight of the vinyl polymer used in the present invention may be between 3000 and 2 000 000, and more preferably between 5000 and 800 000. This type of fluorinated vinyl polymer may be obtained by addition:

- of a vinyl monomer (B) not containing any organofluorine groups in the molecule,

- to a vinyl monomer containing organofluorine groups in the molecule (A), and - a carbosiloxane dendrimer (C) containing radical-polymerizable organic groups represented by general formula (III):

in which Y is a radical-polymerizable organic group and R¹ and X¹ are as defined above, and by subjecting them to a copolymerization. Thus, according to one embodiment, a composition of the invention may comprise a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and which is derived from the copolymerization:

(A) of vinyl monomers containing organofluorine groups in the molecule,

(B) optionally of vinyl monomers not containing any organofluorine groups in the molecule, and

(C) of carbosiloxane dendrimers having radical-polymerizable organic groups represented by general formula (III):

in which Y is a radical-polymerizable organic group, R¹ is an aryl or alkyl group having from 1 to 10 carbon atoms and X¹ is a silylalkyl group represented by formula (II) below:

in which R¹ is as above, R² is an alkylene group having from 1 to 10 carbon atoms, R³ is an alkyl group having from 1 to 10 carbon atoms, and X¹⁺¹ is a group selected from the group comprising hydrogen atoms, aryl groups and alkyl groups having up to 10 carbon atoms, and silylalkyl groups X¹ mentioned above where the "i" is an integer from 1 to 10 indicating the generation of said silylalkyl group beginning in each carbosiloxane dendritic structure with a value of 1 for the group X¹ in formula (III), and the index "a¹" is an integer from 0 to 3, said vinyl polymer having a copolymerization ratio of the component (A) to the component (B) of 0.1 to 100:99.9 to 0% by weight, and a copolymerization ratio of the sum of the component (A) and of the component (B) to the component (C) of 0.1 to 99.9:99.9 to 0.1% by weight.

The vinyl monomers (A) containing organofluorine groups in the molecule are preferably monomers represented by the general formula:

(CH^=CR¹⁵COOR^f. In the formula, R¹⁵ is a hydrogen atom or a methyl group, R^f is an organo fluorine group exemplified by the fluoroalkyl and fluoro alky loxyfluoro alky lene groups described above.

The compounds represented by the formulae given below are suggested by way of specific examples of the component (A). In the formulae given below, "z" is an integer from 1 to 4. CH₂=CCH₃COO-CF₃, CH₂=CCH₃COO-C₂F₅, CH₂=CCH3COO-nC₃F₇,

CH₂=CCH₃COO-CF(CF₃)₂, CH₂=CCH₃COO-nC₄F₉,

CH₂=CCH₃COO-CF(CF₃)₂, CH₂=CCH₃COO-nC₅Fi i ,

CH₂=CCH₃COO-nC₆Fi₃, CH₂=CCH₃COO-nC₈Fi₇, CH₂=CCH₃COO-CH₂CF₃,

CH₂=CCH₃COO-CH(CF₃)₂, CH₂=CCH₃COO-CH₂CH(CF₃)₂, CH₂=CCH₃COO-CH₂ (CF₂)₂F,

CH₂=CCH₃COO-CH₂(CF₂)₂F, CH₂=CCH₃COO-CH₂(CF₂)₄F,

CH₂=CCH₃COO-CH₂(CF₂)₆F, CH₂=CCH₃COO-CH₂(CF₂)_SF,

CH₂=CCH₃COO-CH₂CH₂CF₃, CH₂=CCH₃COO-CH₂CH₂(CF₂)₂F,

CH₂=CCH₃COO-CH₂CH₂(CF₂)₃F, CH₂=CCH₃COO-CH₂CH₂(CF₂)₄F, CH₂=CCH₃COO-CH₂CH₂(CF₂)₆F, CH₂=CCH₃COO-CH₂CH₂(CF₂)₈F,

CH₂=CCH₃COO-CH₂CH₂(CF₂)₁₀F, CH₂=CCH₃COO-CH₂CH₂(CF₂)₁₂F,

CH₂=CCH₃COO-CH₂CH₂(CF₂)₁₄F, CH₂=CCH₃COO-CH₂-CH₂-(CF₂)₁₆F,

CH₂=CCH₃COO-CH₂CH₂CH₂CF₃, CH₂=CCH₃COO-CH₂CH₂CH₂(CF₂)₂F,

CH₂=CCH₃COO-CH₂CH₂CH₂ (CF₂)₂H, CH₂=CCH₃COO-CH₂ (CF₂)₄H, CH₂=CCH₃COO-(CF₂)₃H,

CH₂=CCH₃COO-CH₂CH₂CF(CF₃)- [OCF₂-CF(CF₃)]Z-OC₃ F₇,

CH₂=CCH₃COO-CH₂CH₂CF₂CF₂-[OCF₂-CF(CF₃)]z-OC₃ F₇,

CH₂=CHCOO-CF₃, CH2=CHCOO-C₂F₅, CH₂=CHCOO-nC₃F₇, CH₂=CHCOO-CF(CF₃)₂,

CH₂=CHCOO-nC₄F₉, CH₂=CHCOO-CF₂CF(CF₃)₂, CH₂=CHCOO-nC₅Fn, CH₂=CHCOO-nC₆Fi₃, CH₂=CHCOO-nC₈Fi₇, CH₂=CHCOO-CH₂CF₃,

CH₂=CHCOO-CH(CF₃)₂, CH₂=CHCOO-CH₂CH(CF₃)₂, CH₂=CHCOO- CH₂(CF₂)₂F,

CH₂=CHCOO-CH₂(CF₂)₃F, CH₂=CHCOO-CH₂(CF₂)₄F, CH₂=CHCOO-CH₂(CF₂)₆F,

CH₂=CHCOO-CH₂ (CF₂)₈F, CH₂=CHCOO-CH₂CH₂CF₃,

CH₂=CHCOO-CH₂CH₂ (CF₂)₂F, CH₂=CHCOO-CH₂CH₂(CF₂)₃F, CH₂=CHCOO-CH₂CH₂(CF₂)₄F,

CH₂=CHCOO-CH₂CH₂(CF₂)₆F, CH₂=CHCOO-CH₂CH₂(CF₂)₈F,

CH₂=HCOO-CH₂CH₂(CF₂)₁₀F, CH₂-CHCOO-CH₂CH₂-(CF₂)₁₂F, CH₂=CHCOO-CH₂CH₂(CF₂)_J4F, CH₂=CHCOO-CH₂CH₂(CF₂)_J6F, CH₂=CHCOO-CH₂CH₂CH₂CF₃, CH₂=CHCOO-CH₂CH₂CH₂(CF₂^F, CH₂=CHCOO-CH₂CH₂CH₂ (CF)₂H, CH2=CHCOO-CH₂(CF2)₄H, CH₂=CHCOO-CH₂CH₂(CF₂)_SH, CH₂=CHCOO-CH₂CH₂CF(CF₃)- [OCF₂-CF(CFS)]Z-OC₃ F₇, CH₂=CHCOO-CH₂CH₂CF₂CF₂(CFs)-[OCF₂-CF(CFs)]₂-OCs F₇.

Among these, the vinyl polymers represented by the formulae given below are preferred: CH₂=CHCOO-CH₂CH₂(CF₂)₆F, CH₂=CHCOO-CH₂CH₂(CF₂)₈F, CH₂=CCHsCOO-CH₂CH₂(CF₂)₆F, CH₂=CCHsCOO-CH₂CH₂(CF₂)₈F, CH₂=CHCOO-CH₂CFS, CH₂= CCHSCOO-CH₂CFS.

The vinyl polymers represented by the formulae given below are particularly preferred:

CH₂=CHCOO-CH₂CFS, CH₂=CCHCOO-CH₂CFS. The vinyl monomers (B) not containing any organo fluorine groups in the molecule may be any monomers containing radical-polymerizable vinyl groups which are exemplified, for example, by methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, and other lower alkyl acrylates or methacrylates; glycidyl acrylate, glycidyl methacrylate; n-butyl acrylate, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, octyl acrylate, octyl methacrylate, lauryl acrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate, and other higher acrylates and methacrylates; vinyl acetate, vinyl propionate, and other lower fatty acid vinyl esters; vinyl butyrate, vinyl caproate, vinyl 2-ethylhexanoate, vinyl laurate, vinyl stearate, and other higher fatty acid esters; styrene, vinyltoluene, benzyl acrylate, benzyl methacrylate, phenoxyethyl acrylate, phenoxyethyl methacrylate, vinylpyrrolidone, and other vinylaromatic monomers; dimethylamino ethyl acrylate, dimethylamino ethyl methacrylate, diethylamino ethyl acrylate, diethylamino ethyl methacrylate, and other aminovinyl monomers, acrylamide, methacrylamide, N- methylolacrylamide, N-methylolmethacrylamide, N-methoxymethylacrylamide, N- methoxymethylmethacrylamide, isobutoxymethoxyacrylamide, isobutoxymethoxy- methacrylamide, N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, and other vinylamide monomers; hydroxyethyl acrylate, hydroxyethyl methacrylate, acrylic acid hydroxypropyl alcohol, methacrylic acid hydroxypropyl alcohol, and other hydroxy vinyl monomers; acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid, and other vinylcarboxylic acid monomers; tetrahydrofurfuryl acrylic, tetrahydrofurfuryl methacrylate, butoxyethyl acrylate, butoxyethyl methacrylate, ethoxydiethylene glycol acrylate, ethoxydiethylene glycol methacrylate, polyethylene glycol acrylate, polyethylene glycol methacrylate, polypropylene glycol monoacrylate, polypropylene glycol mo no methacrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, 2- ethylhexyl vinyl ether and other vinyl monomers containing an ether bond; acryloxypropyltrimethoxysilane, methacryloxypropyltrimethoxysilane, polydimethyl- siloxanes containing acryl or methacryl groups at one of the ends, polydimethylsiloxanes containing alkenylaryl groups at one of the ends and other silicone compounds containing unsaturated groups; butadiene; vinyl chloride; vinylidene chloride, acrylonitrile, methacrylonitrile; dibutyl fumarate; maleic anhydride; dodecylsuccinic anhydride; acryl glycidyl ether, methacryl glycidyl ether, 3,4-epoxycyclohexylmethyl acrylate, 3,4-epoxy- cyclohexylmethyl methacrylate, alkali metal salts, ammonium salts and organic amine salts of acrylic acid, of methacrylic acid, of itaconic acid, of crotonic acid, of fumaric acid, of maleic acid and of other radical-polymerizable unsaturated carboxylic acids, radical- polymerizable unsaturated monomers containing sulfonic acid groups, such as styrene sulfonic acid and also the alkali metal salts thereof, the ammonium salts thereof and the organic amine salts thereof; the quaternary ammonium salts derived from acrylic acid or from methacrylic acid, such as 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride, methacrylic acid esters of a tertiary amine alcohol, such as the diethylamine ester of methacrylic acid and quaternary ammonium salts thereof.

In addition, it is also possible to use, by way of vinyl monomers (B), the polyfunctional vinyl monomers which are exemplified, for example, by trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, ethylene glycol diacrylate, ethylene glycol dimethacrylate, tetraethylene glycol diacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, trimethylolpropanetrioxy ethyl acrylate, trimethylolpropanetrioxy ethyl methacrylate, tris(2-hydroxyethyl)isocyanurate diacrylate, tris(2-hydroxyethyl)isocyanurate dimethacrylate, tris(2-hydroxyethyl)isocyanurate triacrylate, tris(2-hydroxyethyl)isocyanurate trimethacrylate, polydimethylsiloxane in which the two ends of the molecular chain are blocked with alkenylaryl groups, and other silicone compounds containing unsaturated groups.

As regards the ratio mentioned above in which the component (A) and the component (B) are copolymerized, the weight ratio of the compound (A) to the compound (B) should be within the range from 0.1 :99.9 to 100:0, and preferably within the range 1 :99 to 100:0.

The carbosiloxane dendrimer (C) is represented by general formula (III) indicated above.

In the component (C), Y may be a radical-polymerizable organic group, the type of which is not subject to any special limitations provided that it is an organic group capable of undergoing a radical addition reaction.

Y may be selected, for example, from organic groups containing acrylic or methacrylic groups, organic groups containing an alkenylaryl group, or alkenyl groups having from 2 to 10 carbon atoms. The organic groups containing acrylic or methacrylic groups may be represented by the general formulae:

and

The alkenylaryl group may be represented by the formula:

In the formulae above, R⁴ and R⁶ are hydrogen atoms or methyl groups, R⁵ and R⁸ are alkylene groups having from 1 to 10 carbon atoms, and R⁷ is an alkyl group having from 1 to 10 carbon atoms. The index "b" is an integer from 0 to 4, and "c" is 0 or 1.

Acryloxymethyl, 3-acryloxypropyl, methacryloxymethyl, 3- methacryloxypropyl, 4-vinylphenyl, 3-vinylphenyl, 4-(2-propenyl)phenyl, 3-(2- propenyl)phenyl, 2-(4-vinylphenyl)ethyl, 2-(3-vinylphenyl)enyl, vinyl, allyl, methallyl and 5-hexenyl are suggested by way of examples of such radical-polymerizable organic groups.

The "i" in formula (II), which is an integer from 1 to 10, is the number of generations of said silylalkyl group, in other words the number of times that the silylalkyl group is repeated.

Thus, the carbosiloxane dendrimer of this component with a generation number of 1 is represented by the general formula:

in which Y, R¹, R² and R³ are as above and R¹² is a hydrogen atom or as R¹ described above. The index "a¹" is an integer from 0 to 3, the average total of "a¹" per molecule being from 0 to 7.

The carbosiloxane dendrimers of this component with a generation number of 2 are represented by the general formula:

in which Y, R¹, R², R³ and R¹² are as above and the indices "a¹" and "a²" are integers from 0 to 3, the average total of "a¹" and "a²" per molecule being from 0 to 25.

The carbosiloxane dendrimers of this component with a generation number of 3 are represented by the general formula:

in which Y, R¹, R², R³ and R¹² are as above and the indices "a¹", "a²" and "a³" are integers from O to 3, the average total of "a¹", of "a²" and of "a³" per molecule being from 0 to 79.

The component (C) can be exemplified by carbosiloxane dendrimers represented by formulae of mean composition, represented below:

CH₃ CH₃

In particular, the carbosiloxane-dendrimer-derived unit comprises at least one tri[tri(trimethylsiloxy)silylethyldimethylsiloxy]silylpropyl carbosiloxane-dendrimer- derived unit corresponding to one of the formulae:

The carbosiloxane dendrimers of the component (C) may be prepared using the process for preparing the siloxane/silylalkylene branched copolymers described in document EP 1 055 674.

For example, they may be prepared by subjecting organic alkenyl silicone compounds and silicone compounds comprising hydrogen atoms linked to the silicon, represented by the general formula:

in which R¹ and Y are as defined above, to a hydrosilylation reaction.

For example, 3-methacryloxypropyltris(dimethylsiloxy)silane, 3- acryloxypropyltris(dimethylsiloxy)silane and 4-vinylphenyltris(dimethylsiloxy)silane are used as silicon compounds represented by the above formula. Vinyltris(trimethyl- siloxy)silane, vinyltris(dimethylphenylsiloxy)silane and 5-hexenyltris(trimethylsiloxy)- silane are used as organosilicon alkenyl compounds. In addition, it is preferable to perform the hydrosilylation reaction in the presence of a transition metal catalyst such as chloroplatinic acid and the platinum/vinylsiloxane complex.

The copolymerization ratio of the component (C), in terms of its weight ratio relative to the total weight of compound (A) and of compound (B), should be within the range from 0.1 :99.9 to 99.9:0.1, preferably within the range 1 :99 to 99:1, and even more preferably within the range from 5:95 to 95:5.

Amino groups may be introduced into the side chains of the vinyl polymer using, included in the component (B), vinyl monomers containing amino groups, such as dimethylamino ethyl acrylate, dimethylamino ethyl methacrylate, diethylamino ethyl acrylate and diethylamino ethyl methacrylate, followed by performing a modification with potassium acetate monochloride, ammonium acetate monochloride, the amino methylpropanol salt of monochloroacetic acid, the triethanolamine salt of monobromoacetic acid, sodium monochloropropionate, and other alkali metal salts of halogenated fatty acids; otherwise, carboxylic acid groups may be introduced into the side chains of the vinyl polymer using, included in the component (B), vinyl monomers containing carboxylic acids, such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid and maleic acid, and the like, followed by neutralizing the product with triethylamine, diethylamine, triethanolamine and other amines.

A fluorinated vinyl polymer may be one of the polymers described in the examples of application WO 03/045337.

According to one preferred embodiment, a grafted vinyl polymer for the purpose of the invention may be carried in an oil or a mixture of oil(s), preferably volatile oil(s), in particular selected from silicone oils and hydrocarbon-based oils and mixtures thereof.

According to one particular embodiment, a silicone oil suitable for the invention may be cyclopentasiloxane. According to another particular embodiment, a hydrocarbon-based oil suitable for the invention may be isododecane.

The vinyl polymers grafted with at least one carbosiloxane-dendrimer-derived unit that may be particularly suitable for the present invention are the polymers sold under the names TIB 4-100, TIB 4-101, TIB 4-120, TIB 4-130, TIB 4-200, FA 4002 ID (TIB 4- 202), TIB 4-220 and FA 4001 CM (TIB 4-230) by the company Dow Corning.

A composition of the invention may comprise a vinyl polymer having at least one carbosiloxane-dendrimer-derived unit in a content with respect to active material ranging from 0.5% to 20% by weight, relative to the total weight of the composition, preferably ranging from 3% to 15% by weight, and preferentially ranging from 4% to 13% by weight, more preferably ranging from 5% to 12% by weight of active material of vinyl polymer having at least one carbosiloxane-dendrimer-derived unit, relative to the total weight of the composition. MICROWAX

A composition of the invention comprises at least one wax used in a micronized form, termed "micro wax". In general, the term "wax" describes a lipophilic compound which is solid at ambient temperature (25°C), which has a reversible solid/liquid change of state, and which has a melting point of greater than or equal to 60⁰C and that can range up to 160⁰C, or even 200⁰C.

The term "micronized wax" or "microwax" is intended to mean a wax which is in a pulverulent form and the particle size of which is between 0.5 and 50 microns, preferably between 1 and 30 microns, or even between 3 and 20 microns.

The term "number-average size" denotes the dimension given by the statistical particle size distribution to half the population, termed D50.

The microwaxes that can be used in the compositions according to the invention are selected from waxes which are solid and hard at ambient temperature, of animal, plant, mineral or synthetic origin, and mixtures thereof.

Preferably, the microwaxes according to the invention have a melting point ranging from 60⁰C to 160⁰C, and in particular greater than or equal to 80⁰C, especially ranging from 80⁰C to 150⁰C, or even greater than or equal to 100⁰C, especially ranging from 100⁰C to 140⁰C.

For the purpose of the invention, the melting temperature corresponds to the temperature of the most endothermic peak observed by thermal analysis (DSC), as described in ISO Standard 11357-3; 1999. The melting point of the microwax can be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name "MDSC 2920" by the company TA Instruments, according to the following protocol.

A sample of 15 mg of product placed in a crucible is subjected to a first temperature increase going from 0⁰C to 160⁰C, at the heating rate of 10°C/minute, is then cooled from 160⁰C to 0⁰C at a cooling rate of 10°C/minute and, finally, is subjected to a second temperature increase going from 0⁰C to 160⁰C at a heating rate of 5°C/minute. During the second temperature increase, the variation in the difference in power absorbed by the empty crucible and by the crucible containing the sample of product is measured as a function of the temperature. The melting point of the compound is the value of the temperature corresponding to the top of the peak of the curve representing the variation in the difference in power absorbed as a function of the temperature.

It should be noted that care will be taken, in the production process, not to melt the microwax. Advantageously, the temperature of the composition during the production process does not exceed a temperature 30⁰C below the melting point of the microwax.

According to one composition of the invention, the micronized waxes have a number-average molecular mass of between 300 and 10 000 g/mol, and preferably between 400 and 3000 g/mol. A wax suitable for the invention may be selected from hydrocarbon-based, silicone and/or fluoro micronized waxes optionally comprising ester, amide, acid or hydroxy 1 functions.

They are in particular of natural origin and can be selected from optionally modified beeswax, carnauba wax, candelilla wax, paraffin waxes, micro crystalline waxes, montan wax, hydrogenated oils such as hydrogenated jojoba oil or hydrogenated castor oil or oils resulting from the polymerization of ethylene and/or of propylene, polyolefm waxes, such as polyethylene or polypropylene waxes, waxes obtained by Fischer-Tropsch synthesis, fatty acid esters and amides, silicone waxes, for instance alkyl-, alkoxy- and/or esters of poly(di)methylsiloxane that are solid at ambient temperature, containing from 10 to 45 carbon atoms, and fatty acids such as stearic acid or behenic acid, and mixtures thereof.

As microwaxes that may be used in the compositions according to the invention, mention may in particular be made of carnauba microwaxes such as those sold under the name MicroCare 350® by the company Micro Powders, microwaxes of synthetic wax such as those sold under the name MicroEase 114S® by the company Micro Powders, microwaxes constituted of a mixture of carnauba wax and of polyethylene wax, such as those sold under the names MicroCare 300® and 310® by the company Micro Powders, microwaxes constituted of a mixture of carnauba wax and of synthetic wax, such as those sold under the name MicroCare 325® by the company Micro Powders, polyethylene microwaxes such as those sold under the names MicroPoly 200®, 220®, 220L® and 250S® by the company Micro Powders, and those sold under the name Cerapure H5-C by the company Shamrock, or polypropylene microwaxes such as those sold under the name Mattewax by the company Micro Powders.

A wax suitable in particular for the invention may be a synthetic wax.

A composition of the invention may comprise at least 0.5% by weight of microwax relative to the total weight of the composition, in particular from 1% to 15%, in particular from 2% to 10%, and even more particularly from 3.5% to 8% by weight of microwax, relative to the total weight of the composition.

According to one embodiment of the invention, a composition may comprise at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and at least one microwax in a weight ratio of greater than or equal to 1 and less than or equal to 10, in particular greater than or equal to 1 and less than or equal to 8, in particular ranging from 1.5 to 5, and more particularly ranging from 1.5 to 3.

PHYSIOLOGICALLY ACCEPTABLE MEDIUM

In addition to the compounds indicated above, a composition according to the invention comprises a physiologically acceptable medium.

The term "physiologically acceptable medium" is intended to denote a medium that is particularly suitable for the application of a composition of the invention to the skin or the lips.

The physiologically acceptable medium is generally suitable for the nature of the support to which the composition should be applied, and also for the way in which the composition should be conditioned.

A composition of the invention may be a dispersion or an emulsion. A dispersion may be prepared in an aqueous phase or in an oily phase. An emulsion may have an oily or aqueous continuous phase. Such an emulsion may, for example, be an invert emulsion (W/O) or a direct emulsion (O/W), or else a multiple emulsion (W/O/W or 0/W/O).

In the case of emulsions, invert emulsions (W/O) are preferred.

Aqueous phase The composition according to the invention may comprise an aqueous phase.

The aqueous phase comprises water. A water suitable for the invention may be a floral water such as cornflower water and/or a mineral water such as Vittel water, Lucas water or La Roche Posay water and/or a spring water.

The aqueous phase may also comprise organic solvents that are water-miscible

(at ambient temperature - 25⁰C) for instance monoalcohols having from 2 to 6 carbon atoms, such as ethanol or isopropanol; polyols having in particular from 2 to 20 carbon atoms, preferably having from 2 to 10 carbon atoms, and preferentially having from 2 to 6 carbon atoms, such as glycerol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol or diethylene glycol; glycol ethers (having in particular from 3 to 16 carbon atoms), such as mono-, di- or tripropylene glycol (C₁-

C4)alkyl ethers, mono-, di- or triethylene glycol (Ci-C4)alkyl ethers, and mixtures thereof. The aqueous phase may also comprise stabilizers, for example sodium chloride, magnesium chloride and magnesium sulfate.

The aqueous phase may also comprise any water-soluble or water-dispersible compound compatible with an aqueous phase, such as gelling agents, film-forming polymers, thickeners, surfactants and mixtures thereof. In particular, a composition of the invention may comprise an aqueous phase in a content ranging from 1% to 80% by weight, especially from 5% to 50%, and more particularly from 10% to 45% by weight, relative to the total weight of the composition.

According to another embodiment, a composition of the invention may be anhydrous. An anhydrous composition may comprise less than 5% by weight of water, relative to the total weight of the composition, and in particular less than 3%, especially less than 2%, and more particularly less than 1% by weight of water, relative to the total weight of the composition.

More particularly, an anhydrous composition may be free of water.

Fatty phase

A cosmetic composition in accordance with the present invention may comprise at least one liquid and/or solid fatty phase.

In particular, a composition of the invention may comprise at least one liquid fatty phase, in particular at least one oil as mentioned hereinafter.

The term "oil" is intended to mean any fatty substance in liquid form at ambient temperature (20-25⁰C) and at atmospheric pressure. A composition of the invention may comprise a liquid fatty phase in a content ranging from 1% to 90%, in particular from 5% to 80%, in particular from 10% to 70%, and more particularly from 20% to 50% by weight, relative to the total weight of the composition. The oily phase suitable for the preparation of the cosmetic compositions according to the invention may comprise hydrocarbon-based, silicone, fluoro or non-fluoro oils, or mixtures thereof.

The oils may be volatile or non-volatile.

They may be of animal, plant, mineral or synthetic origin. For the purpose of the present invention, the term "volatile oil" is intended to mean an oil (or nonaqueous medium) capable of evaporating on contact with the skin in less than one hour, at ambient temperature and at atmospheric pressure. The volatile oil is a volatile cosmetic oil which is liquid at ambient temperature, having in particular a non-zero vapor pressure, at ambient temperature and at atmospheric pressure, in particular having a vapor pressure ranging from 0.13 Pa to 40 000 Pa (10^~3 to 300 mmHg), and preferably ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg), and preferentially ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg).

For the purpose of the present invention, the term "non- volatile oil" is intended to mean an oil having a vapor pressure of less than 0.13 Pa. For the purpose of the present invention, the term "silicone oil" is intended to mean an oil comprising at least one silicon atom, and in particular at least one SiO group.

The term "fluoro oil" is intended to mean an oil comprising at least one fluorine atom.

The term "hydrocarbo-based oil" is intended to mean an oil containing mainly hydrogen and carbon atoms.

The oils may optionally comprise oxygen, nitrogen, sulfur and/or phosphorus atoms, for example in the form of hydroxyl or acid radicals.

Volatile oils The volatile oils may be selected from hydrocarbon-based oils having from 8 to

16 carbon atoms, and in particular branched Cs-Ci₆ alkanes (also known as isoparaffins), such as isododecane (also known as 2,2,4,4, 6-pentamethylheptane), isodecane or isohexadecane, and, for example, the oils sold under the trade names Isopars^® or

Permethyls^®.

Use may also be made, as volatile oils, of volatile silicones, such as, for example, volatile linear or cyclic silicone oils, in particular those having a viscosity < 8 centistokes (cSt) (8 x 10^~6 m²/s) and having in particular from 2 to 10 silicon atoms, and in particular from 2 to 7 silicon atoms, these silicon atoms optionally comprising alkyl or alkoxy groups having from 1 to 10 carbon atoms. As volatile silicone oil that can be used in the invention, mention may in particular be made of dimethicones having a viscosity of 5 and 6 cSt, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltri- siloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and mixtures thereof.

Use may also be made of volatile fluoro oils, such as nonafluoromethoxybutane or perfluoromethylcyclopentane, and mixtures thereof. According to one embodiment, a composition of the invention may comprise from 1% to 80% by weight, or even from 5% to 70% by weight, or even from 10% to 60% by weight, and in particular from 15% to 50% by weight of volatile oil, relative to the total weight of the composition.

Non-volatile oils

The non-volatile oils may in particular be selected from non-volatile hydrocarbon-based, fluoro and/or silicone oils.

As non-volatile hydrocarbon-based oil, mention may in particular be made of: - hydrocarbon-based oils of animal origin, such as perhydrosqualene, - hydrocarbon-based oils of plant origin, such as phytostearyl esters, for instance phytostearyl oleate, phytostearyl isostearate and lauroyl/octyldodecyl/phytostearyl glutamate (Ajinomoto, Eldew PS203), triglycerides constituted of fatty acid esters of glycerol, in particular in which the fatty acids may have chain lengths ranging from C₄ to C36, and in particular from C₁₈ to C36, it being possible for these oils to be linear or branched, and saturated or unsaturated; these oils may in particular be heptanoic or octanoic triglycerides, shea oil, alfalfa oil, poppy seed oil, pumpkin oil, millet oil, barley oil, quinoa oil, rye oil, candlenut oil, passionflower oil, shea butter, aloe oil, sweet almond oil, peach kernel oil, groundnut oil, argan oil, avocado oil, baobab oil, borrage oil, broccoli oil, calendula oil, camelina oil, canola oil, carrot oil, safflower oil, hemp oil, rapeseed oil, cotton seed oil, coconut oil, marrow seed oil, wheatgerm oil, jojoba oil, lilly oil, macadamia oil, corn oil, meadowfoam oil, St. John's Wort oil, monoi oil, hazelnut oil, apricot kernel oil, nut oil, olive oil, evening primrose oil, palm oil, blackcurrent seed oil, kiwi seed oil, grapeseed oil, pistachio oil, pumpkin oil, winter squash oil, quinoa oil, musk rose oil, sesame oil, soya oil, sunflower oil, castor oil and watermelon oil, and mixtures thereof, or alternatively caprylic/capric acid triglycerides, for instance those sold by the company Stearineries Dubois or those sold under the names Miglyol 810^®, 812^® and 818^® by the company Dynamit Nobel;

- linear or branched hydrocarbons of mineral or synthetic origin, such as liquid paraffins and derivatives thereof, petroleum jelly, polydecenes, polybutenes, hydrogenated polyisobutene such as Parleam, squalane;

- synthetic ethers having from 10 to 40 carbon atoms; - synthetic esters, for instance oils of formula RiCOOR₂, in which Ri represents a linear or branched fatty acid residue containing from 1 to 40 carbon atoms, and R₂ represents a hydrocarbon-based chain, in particular a branched chain, containing from 1 to 40 carbon atoms provided that Ri + R₂ is > 10. The esters may in particular be selected from fatty acid and alcohol esters, for instance: cetostearyl octanoate, isopropyl alcohol esters, such as isopropyl myristate, isopropyl palmitate, ethyl palmitate, 2-ethylhexyl palmitate, isopropyl stearate or isostearate, isostearyl isostearate, octyl stearate, hydroxylated esters, for instance isostearyl lactacte, octyl hydroxystearate, diisopropyl adipate, heptanoates, and especially isostearyl heptanoate, alcohol or polyalcohol octanoates, decanoates or ricinoleates, for instance propylene glycol dioctanoate, cetyl octanoate, tridecyl octanoate, 2-ethylhexyl 4-diheptanoate and palmitate, alkyl benzoate, polyethylene glycol diheptanoate, propylene glycol 2-diethylhexanoate, and mixtures thereof, Ci₂-CiS alkyl benzoates, hexyl laurate, neopentanoic acid esters, for instance isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, or octyldodecyl neopentanoate, isononanoic acid esters, for instance isononyl isononanoate, isotridecyl isononanoate and octyl isononanoate, hydroxylated esters such as isostearyl lactate and diisostearyl malate;

- polyol esters and pentaerythritol esters, for instance dipentaerythrityl tetrahydroxystearate/tetraisostearate,

- esters of diol dimers and diacid dimers, such as Lusplan DD-DA5^® and Lusplan DD-DA7^®, sold by the company Nippon Fine Chemical and described in application US 2004-175338, - copolymers of a diol dimer and of a diacid dimer and esters thereof, such as copolymers of dilinoleyl diol dimers/dilinoleic dimers and esters thereof, for instance Plandool-G,

- copolymers of polyols and of diacid dimers, and esters thereof, such as Hailuscent ISDA, or the copolymer of dilinoleic acid/butanediol, - fatty alcohols that are liquid at ambient temperature, with a branched and/or unsaturated carbon chain having from 12 to 26 carbon atoms, for instance 2- octyldodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol and 2- undecylpentadecano 1,

- C12-C22 higher fatty acids, such as oleic acid, linoleic acid or linolenic acid, and mixtures thereof, and

- dialkyl carbonates, the two alkyl chains possibly being identical or different, such as the dicaprylyl carbonate sold under the name Cetiol CC^® by Cognis,

- oils of higher molar mass having in particular a molar mass ranging from approximately 400 to approximately 10 000 g/mol, in particular from approximately 650 to approximately 10 000 g/mol, in particular from approximately 750 to approximately 7500 g/mol, and more particularly ranging from approximately 1000 to approximately 5000 g/mol. As oils of higher molar mass that can be used in the present invention, mention may in particular be made of the oils selected from:

• lipophilic polymers, • linear fatty acid esters having a total carbon number ranging from 35 to

70,

• hydroxylated esters,

• aromatic esters,

• esters of C24-C28 branched fatty acids or fatty alcohols, • silicone oils,

• oils of plant origin,

• and mixtures thereof; fluoro oils optionally partially hydrocarbon-based and/or silicone-based, such as fluorosilicone oils, fluorinated polyethers or fluorinated silicones, as described in document EP-A-847752; silicone oils, such as polydimethylsiloxanes (PDMS) which are non- volatile and linear or cyclic; polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups which are pendant or at the end of the silicone chain, said groups having from 2 to 24 carbon atoms; phenylated silicones, such as phenyl trimethicones, phenyl dimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenyl dimethicones, diphenylmethyldiphenyl- trisiloxanes or (2-pheny let hyl)trimethylsiloxy silicates, and - mixtures thereof.

According to one particular embodiment, the fatty phase of the composition may contain only volatile compounds.

Lipophilic structuring agent A composition according to the invention may comprise at least one agent for structuring a liquid fatty phase, selected from a wax, a pasty compound, and mixtures thereof.

In particular, a wax suitable for the invention may especially be selected from waxes of animal, plant, mineral and synthetic origin, and mixtures thereof. By way of examples of waxes that can be used according to the invention, mention may be made of:

- waxes of animal origin such as beeswax, plant waxes such as carnauba wax, candelilla wax, ouricury wax or Japan wax,

- mineral waxes, for example paraffin wax, or microcrystalline waxes or ozokerites,

- synthetic waxes, among which are polyethylene waxes, and waxes obtained by Fisher-Tropsch synthesis,

- silicone waxes, in particular substituted linear polysiloxanes; mention may, for example, be made of silicone polyether waxes, alkyl dimethicones or alkoxy dimethicones having from 16 to 45 carbon atoms, alkyl methicones such as the C₃₀-C₄₅ alkyl methicone sold under the trade name "AMS C 30" by Dow Corning,

- hydrogenated oils that are solid at 25°C, such as hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated tallow or hydrogenated coconut oil, and fatty esters that are solid at 25°C, for instance the C₂₀-C₄₀ alkyl stearate sold under the trade name "Kester Wax K82H" by the company Koster Keunen,

- and/or mixtures thereof. A composition according to the invention may comprise at least one pasty compound.

The presence of a pasty compound may make it possible to advantageously confer improved comfort when a composition of the invention is deposited on keratin fibers. Such a compound may be advantageously selected from lanolin and derivatives thereof; polymeric or nonpolymeric silicone compounds; polymeric or nonpolymeric fluoro compounds; vinyl polymers, in particular olefin homopolymers; olefin copolymers; hydrogenated diene homopolymers and copolymers; linear or branched and homo- or copolymeric oligomers of alkyl (meth)acrylates preferably having a C8-C30 alkyl group; homo- and copolymeric oligomers of vinyl esters having C8-C30 alkyl groups; homo- and copolymeric oligomers of vinyl ethers having C8-C30 alkyl groups; liposoluble polyethers resulting from polyetherification between one or more C2-C100, in particular C2-C50 diols; fatty acid or alcohol esters; and mixtures thereof.

Among the esters, mention may in particular be made of: - the esters of an oligomeric glycerol, especially the esters of diglycerol, for instance polyglyceryl-2 triisostearate, the condensates of adipic acid and of glycerol, for which a portion of the hydroxyl groups of the glycerols have reacted with a mixture of fatty acids, such as stearic acid, capric acid, stearic acid and isostearic acid and 12- hydroxystearic acid, such as in particular those sold under the trade mark Softisan 649 by the company Sasol, or such as bisdiglyceryl polyacyladipate-2; the arachidyl propionate sold under the trade mark Waxenol 801 by Alzo; phytosterol esters; triglycerides of fatty acids and derivatives thereof, such as hydrogenated cocoglycerides; noncrosslinked polyesters resulting from poly condensation between a linear or branched C4-C50 dicarboxylic acid or polycarboxylic acid and a C2-C50 diol or polyol; aliphatic esters of an ester resulting from the esterification of an aliphatic hydroxycarboxylic acid ester with an aliphatic carboxylic acid; polyesters resulting from the esterification, with a polycarboxylic acid, of an aliphatic hydroxycarboxylic acid ester, said ester comprising at least two hydroxyl groups, such as the products Risocast DA-H^® and Risocast DA-L^®; and mixtures thereof.

The structuring agent(s) may be present in a composition of the invention in a content ranging from 0.1% to 30% by weight of agents, more preferably from 0.5% to 20% by weight, relative to the total weight of the composition.

THICKENERS

Depending on the fluidity of the composition that it is desired to obtain, one or more thickeners or gelling agents may be incorporated into a composition of the invention. A thickener or gelling agent suitable for the invention may be hydrophilic, i.e. water-soluble or water-dispersible.

As hydrophilic gelling agents, mention may in particular be made of water- soluble or water-dispersible thickening polymers. Said polymers may in particular be selected from: modified or unmodified carboxyvinyl polymers, such as the products sold under the name Carbopol (CTFA name: carbomer) by the company Goodrich; polyacrylates and polymethacrylates, such as the products sold under the names Lubrajel and Norgel by the company Guardian or under the name Hispagel by the company Hispano Chimica; polyacrylamides; 2-acrylamido-2-methylpropanesulfonic acid polymers and copolymers, which are optionally crosslinked and/or neutralized, such as the poly(2- acrylamido-2-methylpropanesulfonic acid) sold by the company Clariant under the name "Hostacerin AMPS" (CTFA name: ammonium polyacryldimethyltauramide); crosslinked anionic acrylamide/AMPS copolymers, in the form of a W/O emulsion, such as those sold under the name Sepigel 305 (CTFA name: Polyacrylamide/C13-14 Isoparaffϊn/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 xanthan gum, guar gum, carob gum, gum acacia, scleroglucans, chitin derivatives and chitosan derivatives, carrageenans, gellans, alginates, or celluloses such as microcrystalline cellulose, carboxymethylcellulose, hydroxymethylcellullose and hydroxypropylcellulose; and mixtures thereof. A thickener or gelling agent suitable for the invention may be lipophilic, it may be mineral or organic.

As lipophilic thickeners, mention may, for example, be made of modified clays, such as modified magnesium silicate (Bentone gel VS38 from Rheox), modified hectorites such as hectorite modified with a C₁₀ to C22 fatty acid ammonium chloride, for instance hectorite modified with distearyldimethylammonium chloride, for instance the product sold under the name Bentone 38V^® by the company Elementis or the product sold under the name "Bentone 38 CE" by the company Rheox or the product sold under the name Bentone Gel V5 5V by the company Elementis.

The polymeric organic lipophilic gelling agents are, for example, partially or totally crosslinked elastomeric organopolysiloxanes with a three-dimensional structure, such as those sold under the names KSG6^®, KSG16^® and KSG18^® by the company Shin- Etsu, Trefil E-505C^® and Trefil E-506C^® by the company Dow-Corning, Gransil SR- CYC^®, SR DMF 10^®, SR-DC556^®, SR 5CYC gel^®, SR DMF 10 gel^® and SR DC 556 gel^® by the company Grant Industries and SF 1204^® and JK 113^® by the company General Electric, ethylcellulose, such as the product sold under the name Ethocel^® by the company Dow Chemical; polyamide-type poly condensates resulting from condensation between a dicarboxylic acid containing at least 32 carbon atoms and an alkylene diamine, and in particular ethylene diamine, in which the polymer comprises at least one terminal carboxylic acid group esterified or amidified with at least one monoalcohol or one monoamine containing from 12 to 30 carbon atoms, and linear and saturated, and in particular ethylenediamine/stearyl dilinoleate copolymers such as the product sold under the name Uniclear 100 VG^® by the company Arizona Chemical; galactomannans containing from one to six, and in particular from two to four, hydroxyl groups per monosaccharide, substituted with a saturated or unsaturated alkyl chain, such as guar gum alkylated with Ci to C₆, and in particular Ci to C3, chains, and mixtures thereof. Block copolymers of "diblock", "triblock" or "radial" type, of the polystyrene/polyisoprene or polystyrene/polybutadiene type, such as those sold under the name Luvitol HSB^® by the company BASF, of the polystyrene/copoly(ethylene-propylene) type, such as those sold under the name Kraton^® by the company Shell Chemical Co, or else of the polystyrene/copoly(ethylene-butylene) type, blends of triblock and radial (star) copolymers in isododecane, such as those sold by the company Penreco under the name Versagel^®, for instance the mixture of butylene/ethylene/styrene triblock copolymer and of ethylene/propylene/styrene star copolymer in isododecane (Versagel M 5960).

Among the lipophilic gelling agents that can be used in a cosmetic composition of the invention, mention may also be made of esters of dextrin and of a fatty acid, such as dextrin palmitates, in particular such as those sold under the names Rheopearl TL^® or Rheopearl KL^® by the company Chiba Flour, hydrogenated plant oils, such as hydrogenated castor oil, fatty alcohols, in particular Cs to C₂₆, and more particularly C12 to C₂₂ fatty alcohols, for instance myristyl alcohol, cetyl alcohol, stearyl alcohol and behenyl alcohol.

According to one embodiment, a composition of the invention may comprise thickeners in a content with respect to active material ranging from 0.01% to 40% by weight, especially from 0.1% to 20% by weight, and more particularly from 0.3% to 15% by weight, relative to the total weight of the composition.

COLORANTS

A composition according to the invention may also comprise at least one colorant. A cosmetic composition in accordance with the invention may advantageously incorporate at least one colorant selected from organic or inorganic colorants, in particular such as pigments or nacres conventionally used in cosmetic compositions, liposoluble or water-soluble coloring agents, materials with a specific optical effect, and mixtures thereof.

The term "pigments" should be understood to mean white or colored, inorganic or organic particles which are insoluble in an aqueous solution and are intended for coloring and/or opacifying the resulting film.

The pigments may be present in a proportion of from 0.1% to 40% by weight, especially from 1% to 30% by weight, and in particular from 5% to 15% by weight, relative to the total weight of the cosmetic composition. As inorganic pigments that can be used in the invention, mention may be made of titanium dioxide, zirconium oxide or cerium oxide, and also zinc oxide, iron oxide or chromium oxide, ferric blue, manganese violet, ultramarine blue and chromium hydrate.

The pigment may also be a pigment having a structure which may be, for example, of sericite/brown iron oxide/titanium dioxide/silica type. Such a pigment is sold, for example, under the reference Coverleaf NS or JS by the company Chemicals and Catalysts and has a contrast ratio of around 30.

The colorant may also comprise a pigment having a structure which may, for example, be of the type of silica microspheres containing iron oxide. An example of a pigment having this structure is sold by the company Miyoshi under the reference PC Ball PC-LL-100 P, this pigment being composed of silica microspheres containing yellow iron oxide. Among the organic pigments that can be used in the invention, mention may be made of carbon black, D & C pigments, lakes based on cochineal carmine, on barium, strontium, calcium or aluminum, or else the diketopyrrolopyrroles (DPP) described in documents EP-A-542 669, EP-A-787 730, EP-A-787 731 and WO-A-96/08537.

The term "nacres" should be understood to mean iridescent or noniridescent colored particles of any shape, which are in particular produced by certain molluscs in their shell or else are synthesized, and which exhibit a color effect by optical interference.

The nacres may be selected from pearlescent pigments such as titanium mica coated with iron oxide, titanium mica coated with bismuth oxychloride, titanium mica coated with chromium oxide, titanium mica coated with an organic dye, and pearlescent pigments based on bismuth oxychloride. This may also involve mica particles at the surface of which are superposed at least two successive layers of metal oxides and/or of organic colorants.

By way of example of nacres, mention may also be made of natural mica coated with titanium oxide, with iron oxide, with natural pigment or with bismuth oxychloride.

Among the nacres available on the market, mention may be made of the nacres

Timica, Flamenco and Duochrome (based on mica) sold by the company Engelhard, the

Timiron nacres sold by the company Merck, the Prestige mica-based nacres sold by the company Eckart and the synthetic-mica-based Sunshine nacres sold by the company Sun Chemical.

The nacres may more particularly possess a yellow, pink, red, bronze, orange, brown, gold and/or copper color or glint.

By way of illustration of nacres which can be used in the context of the present invention, mention may in particular be made of the golden nacres sold in particular by the hcompany Engelhard under the name Brillant gold 212G (Timica), Gold 222C

(Cloisonne), Sparkle gold (Timica), Gold 4504 (Chromalite) and Monarch gold 233X

(Cloisonne); the bronze nacres sold in particular by the company Merck under the name Bronze fine (17384) (Colorona) and Bronze (17353) (Colorona) and by the company Engelhard under the name Super bronze (Cloisonne); the orange nacres sold in particular by the company Engelhard under the name Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica) and by the company Merck under the name Passion orange (Colorona) and Matte orange (17449) (Microna); the brown-hued nacres sold in particular by the company Engelhard under the name Nu-antique copper 340XB (Cloisonne) and Brown CL4509 (Chromalite); the copper-glint nacres sold in particular by the company Engelhard under the name Copper 340A (Timica); the red-glint nacres sold in particular by the company Merck under the name Sienna fine (17386) (Colorona); the yellow-glint nacres sold in particular by the company Engelhard under the name Yellow (4502) (Chromalite); the gold-glint red-hued nacres sold in particular by the company Engelhard under the name Sunstone GO 12 (Gemtone); the pink nacres sold in particular by the company Engelhard under the name Tan opale G005 (Gemtone); the gold-glint black nacres sold in particular by the company Engelhard under the name Nu antique bronze 240 AB (Timica), the blue nacres sold in particular by the company Merck under the name Matte blue (17433) (Microna), the silver-glint white nacres sold in particular by the company Merck under the name Xirona Silver and the green-gold and pinkish orangish nacres sold in particular by the company Merck under the name Indian summer (Xirona), and mixtures thereof.

The cosmetic composition according to the invention may also comprise water- soluble or liposoluble dyes. The liposoluble dyes are, for example, Sudan red, DC Red 17, DC Green 6, β-carotene, soya oil, Sudan brown, DC Yellow 11, DC Violet 2, DC orange 5 and quinoline yellow. The water-soluble dyes are, for example, beetroot juice and caramel. The cosmetic composition according to the invention may also contain at least one material with a specific optical effect. This effect is different than a simple, conventional hue effect, i.e. a unified and stabilized effect of the kind produced by conventional colorants, such as, for example, monochromatic pigments. For the purpose of the invention, the term "stabilized" signifies absence of an effect of variability of color with the angle of observation or else in response to a temperature change. For example, this material may be selected from particles having a metallic glint, goniochromatic coloring agents, diffracting pigments, thermochromatic agents, optical brighteners, and also fibers, in particular of interference type. Of course, these various materials may be combined so as to provide the simultaneous manifestation of two effects, or even a new effect in accordance with the invention.

The metallic-glint particles that can be used in the invention are in particular selected from: - particles of at least one metal and/or of at least one metal derivative, particles comprising a single-substance or multi-substance, organic or inorganic substrate, at least partially coated with at least one metal-glint layer comprising at least one metal and/or at least one metal derivative, and mixtures of said particles. Among the metals that may be present in said particles, mention may, for example, be made of Ag, Au, Cu, Al, Ni, Sn, Mg, Cr, Mo, Ti, Zr, Pt, Va, Rb, W, Zn, Ge, Te, Se and mixtures or alloys thereof. Ag, Au, Cu, Al, Zn, Ni, Mo, Cr and mixtures or alloys thereof (for example, bronzes and brasses) are preferred metals.

The term "metal derivatives" denotes compounds derived from metals, in particular oxides, fluorides, chlorides and sulfides.

By way of illustration of these particles, mention may be made of aluminum particles, such as those sold under the names Starbrite 1200 EAC^® by the company Siberline and Metalure^® by the company Eckart.

Mention may also be made of metal powders of copper or of alloy mixtures, such as the references 2844 sold by the company Radium Bronze, metal pigments, such as aluminum or bronze, for instance those sold under the name Rotosafe 700 by the company

Eckart, the silica-coated aluminum particles sold under the name Visionaire Bright Silver from the company Eckart, and the metal alloy particles such as silica-coated bronze

(copper and zinc alloy) sold under the name Visionaire Bright Natural Gold from the company Eckart.

The particles in question may also be particles comprising a glass substrate, such as those sold by the company Nippon Sheet Glass under the name Microglass Metashine.

The goniochromatic coloring agent may be selected, for example, from multilayer interference structures and liquid-crystal coloring agents.

Examples of symmetrical multilayer interference structures that may be used in compositions prepared in accordance with the invention are, for example, the following structures: Al/SiO₂ZAlZSiO₂ZAl, pigments having this structure being sold by the company Dupont de Nemours; Cr/MgF₂/Al/MgF₂/Cr, pigments having this structure being sold under the name Chromaflair by the company Flex; MoS₂ZSiO₂ZAlZSiO₂ZMoS₂; Fe₂O₃ZSiO₂ZAlZSiO₂ZFe₂O₃ and Fe₂O₃ZSiO₂ZFe₂O₃ZSiO₂ZFe₂O₃, pigments having these structures being sold under the name Sicopearl by the company BASF; MoS₂ZSiO₂Zmica- oxideZSiO₂ZMoS₂; Fe2θ₃ZSiO₂Zmica-oxideZSiO₂ZFe2θ₃; TiO₂ZSiO₂ZTiO₂ and TiO₂ZAl₂O₃ZTiO₂; SnOZTiO₂ZSiO₂ZTiO₂ZSnO; Fe₂O₃ZSiO₂ZFe₂O₃;

SnOZmicaZTiO₂ZSiO₂ZTiO₂ZmicaZSnO, pigments having these structures being sold under the name Xirona by the company Merck (Darmstadt). By way of example, these pigments may be the pigments of silicaZtitanium oxideZtin oxide structure sold under the name Xirona Magic by the company Merck, the pigments of silicaZbrown iron oxide structure sold under the name Xirona Indian Summer by the company Merck and the pigments of silicaZtitanium oxideZmicaZtin oxide structure sold under the name Xirona Carribean Blue sold by the company Merck. Mention may also be made of the Infinite Colors pigments from the company Shiseido. Depending on the thickness and the nature of the various layers, various effects are obtained. Thus, with the Fe₂O₃ZSiO₂ZAlZSiO₂ZFe₂O₃ structure, the color changes from green-golden to red-gray for SiO₂ layers of 320 to 350 nm; from red to golden for SiO₂ layers of 380 to 400 nm; from violet to green for SiO₂ layers of 410 to 420 nm; from copper to red for SiO₂ layers of 430 to 440 nm. By way of example of pigments with a polymeric multilayer structure, mention may be made of those sold by the company 3M under the name Color Glitter.

Examples of liquid-crystal goniochromatic particles that may be used include those sold by the company Chenix, and also the product sold under the name Helicone^® HC by the company Wacker.

FILLERS

A composition in accordance with the invention may also comprise at least one filler, of organic or inorganic nature, which makes it possible in particular to confer thereon additional properties of mattness, of covering power andZor of improved stability with regard to exudation and post-application anti-migration properties.

The term "filler" should be understood to mean colorless or white solid particles of any shape, which are in a form that is insoluble or dispersed in the medium of the composition. Inorganic or organic in nature, they make it possible to confer body or rigidity on the composition, and/or softness, and uniformity on the makeup.

The fillers used in the compositions according to the present invention may be of lamellar, globular or spherical form, or in the form of fibers or in any other form intermediate between these defined forms.

The fillers according to the invention may or may not be surface-coated, and in particular they may be surface-treated with silicones, amino acids, fluoro derivatives or any other substance that promotes the dispersion and compatibility of the filler in the composition. Among the fillers that can be used in the compositions according to the invention, mention may be made of talc, mica, kaolin, bentone, precipitated calcium carbonate, magnesium carbonate, magnesium hydrogen carbonate, hydroxyapatite, boron nitride, glass or ceramic microcapsules, composites of silica and of titanium dioxide, such as the TSG series sold by Nippon Sheet Glass, polyamide powders (Nylon^® Orgasol from Atochem), poly-β-alanine powders and polyethylene powders, polytetrafluoroethylene powders (Teflon^®), lauroyllysine, starch, hollow polymer microspheres such as Expancel (Nobel Industrie), metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, for example zinc stearate, magnesium stearate or lithium stearate, zinc laurate, magnesium myristate, Polypore^® L 200 (Chemdal Corporation), silicone resin microbeads (for example, Tospearl^® from Toshiba), polyurethane powders, in particular powders of crosslinked polyurethane comprising a copolymer, said copolymer comprising trimethylol hexyllactone. In particular, it may be a polymer of hexamethylene diisocyanate/trimethylol hexyllactone. Such particles are in particular commercially available, for example under the name Plastic Powder D-400^® or Plastic Powder D-800^® from the company Toshiki, and mixtures thereof.

ACTIVE AGENTS

A composition of the invention may also comprise at least one cosmetic active agent and/or one dermato logical active agent.

By way of nonlimiting examples of cosmetic and/or dermato logical active agents suitable for the invention, mention may be made of the active agents selected from the following agents:

- hydrating agents, desquamating agents, barrier function enhancers, depigmenting agents, antioxidants, dermodecontracting agents, anti-glycation agents, agents for stimulating the synthesis of dermal and/or epidermal macromolecules and/or preventing their degradation, agents for stimulating fibroblast or keratinocyte proliferation and/or keratinocyte differentiation, agents for promoting maturation of the horny envelope, NO-synthase inhibitors, peripheral benzodiazepine receptor (PBR) antagonists, agents for increasing sebacious gland activity, agents for stimulating the energy metabolism of cells, tensioning agents, fat-restructuring agents, slimming agents, agents for promoting cutaneous microcirculation, calmatives and/or anti- irritants, sebum-regulated or antiseborrheic agents, astringents, cicatrizing agents, antiinflammatories and anti-acne agents,

- matting agents, soft-focus fillers, fluorescent agents, agents for promoting the natural pinkish color of the skin, and abrasive or exfoliant fillers, - and mixtures thereof.

The cosmetic and/or dermatological active agents suitable for the invention may in particular be selected from the agents mentioned in application EP 1 847 247.

It is part of the abilities of those skilled in the art to select said active agent(s) and the content thereof as a function of the desired effect on the keratin materials, and so as not to affect the cosmetic properties of the compositions of the invention.

By way of example, the active agent(s) may be present in a content ranging from 0.01% to 20% by weight, preferably from 0.01% to 10%, and more preferably from 0.05% to 1% by weight of active agents, relative to the total weight of the composition.

ADDITIVES

A cosmetic composition according to the invention may also further comprise any additive normally used in the field under consideration, for example selected from gums, anionic, cationic, amphoteric or nonionic surfactants, silicone surfactants, gums, resins, dispersants, semicrystalline polymers, antioxidants, essential oils, preservatives, fragrances, neutralizing agents, antiseptics, anti-UV protective agents, cosmetic active agents, such as vitamins, hydrating agents, emollients or collagen-protecting agents, and mixtures thereof. Those skilled in the art can adjust the nature and amount of the additives present in the compositions in accordance with the invention by means of routine operations, such that the cosmetic properties and the stability properties desired for these compositions are not thereby affected.

A composition according to the invention may in particular be in the form of a composition for making up and/or caring for the skin or the lips, in particular a foundation.

The present invention is presented in greater detail in the examples described hereinafter, which are proprosed only by way of illustration of the invention and should not be interpreted as limiting the invention.

EXAMPLES Example 1

Influence of the nature of the polymer on mattness staying power

The fluid foundation examples IA to IF show that the mattness staying power depends on the ratio (R) of the content by weight of silicone acrylate dendrimer to the content by weight of filler.

General formulation of example 1

Polymer: Butyl acrylate copolymer containing dendritic silicone side chains: Tri((trimethylsiloxy)siloxyethyldimethylsiloxy)silylpropyl-methacrylate in isododecane (40/60) sold under the reference Dow Corning FA 4002 ID by Dow Corning

Operating protocol

The constituents of phase Al are weighed out into the main beaker and heated to 75°C, until the butyl paraben has dissolved.

Phases A2 and A3 are then added, at ambient temperature, with stirring using a Moritz stirrer (1000 rpm). When the dispersion is completely homogeneous, phase A4 is added, while maintaining stirring.

Phase A5 is prepared separately by grinding, in a three-roll mill, a mixture of pigments and cyclohexasiloxane, three times.

This phase A5 is then added, while maintaining stirring, as are phases A6, A7 and A8.

Phase B, the aqueous phase, is also prepared separately, by weighing the PEG- 20 out into a beaker, followed by the methyl paraben and the magnesium sulfate, and adding water preheated to 95°C.

The aqueous phase is stirred using a magnetic bar until the three constituents have dissolved, and then the phenoxyethanol is added at 40⁰C.

The emulsion is prepared at ambient temperature: phase B, the aqueous phase, is poured into the fatty phase with the stirring speed being gradually increased (Moritz stirrer) to 4500 rpm. The stirring is maintained for 10 min.

Next, phase C (ethanol) is finally added. The product obtained is stirred in a Rayneri mixer (blade mixer) and stirred for 10 min at 100 rpm.

Measurement of the mattness and of the mattness staying power The mattness and the mattness staying power are evaluated on a panel of 16 women according to the protocol previously indicated.

The results obtained with compounds IA to IF are given in the table below.

Mattness: + weak, ++ medium, +++ good, ++++ very good, Staying power: + weak, ++ medium, +++ good, ++++ very good.

These results show that the mattness staying power is improved when the percentage by weight of polymer is greater than or equal to that of the filler, i.e. a ratio R of greater than or equal to 1.

Example 2

Influence of the nature of the filler on mattness staying power The compositions of examples 2A to 2C show that the mattness staying power depends on the nature of the filler.

General formulation of example 2

The operating protocol and the measurement of the mattness and of the mattness staying power are carried out as indicated for example 1.

Results:

The obtained results show that the paraffin microwax confers an improved and better staying power to the composition than Nylon or PMMA.

The nature of the filler appears to be determinant for conferring to the compositions of the invention improved properties in terms mattness and of staying power of matness.

Claims

1. A cosmetic composition for making up and/or caring for the skin, comprising a physiologically acceptable medium containing at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and at least one microwax, the ratio by weight between said vinyl polymer and said wax being greater than or equal to 1.

2. The composition of the preceding claim, in which said vinyl polymer having at least one carbosiloxane-dendrimer-derived unit has a side molecular chain containing a carbosiloxane dendrimer structure, and is derived from the polymerization:

(A) of 0 to 99.9 parts by weight of a vinyl monomer; and

(B) of 100 to 0.1 parts by weight of a carbosiloxane dendrimer containing a radical-polymerizable organic group, represented by the general formula:

in which R¹ is as defined above, R² represents an alkylene group having from 2 to 10 carbon atoms, R³ represents an alkyl group having from 1 to 10 carbon atoms, X¹⁺¹ represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or the silylalkyl group as defined above with i = i + 1; i is an integer from 1 to 10 which represents the generation of said silylalkyl, and a¹ is an integer from 0 to 3; where said radical-polymerizable organic group contained in the component (B) is selected from: organic groups containing a methacrylic group or an acrylic group and which are represented by the formulae:

and

in which R⁴ represents a hydrogen atom or an alkyl group, R⁵ represents an alkylene group having from 1 to 10 carbon atoms; and organic groups containing a styryl group and which are represented by the formula:

3. Composition as claimed in claim 1 or 2, in which said vinyl polymer having at least one carbosiloxane-dendrimer-derived unit is derived from the copolymerization:

(A) of vinyl monomers containing organofluorine groups in the molecule,

R¹

Y-Si O-Si -X¹

R¹ in which Y is a radical-polymerizable organic group, R is an aryl or alkyl group having from 1 to 10 carbon atoms and X¹ is a silylalkyl group represented by formula (II) below:

4. The composition as claimed in the preceding claim, in which said radical- polymerizable organic group Y in the component (C) is a group selected from the group comprising: organic groups containing acrylic or methacrylic groups represented by the general formula:

in which R⁴ is a hydrogen atom or methyl, and R⁵ is an alkylene group having from 1 to 10 carbon atoms or

in which R⁴ and R⁵ are as de ϊffiinneedd aabboovvee,, - organic groups containing alkenylaryl groups represented by the general formula:

in which R⁶ is a hydrogen atom or methyl, R⁷ is an alkyl group having from 1 to 10 carbon atoms, R⁸ is an alkylene group having from 1 to 10 carbon atoms, "b" is an integer from 0 to 4 and "c" is 0 or 1, and alkenyl groups having from 2 to 10 carbon atoms.

5. The composition as claimed in any one of the preceding claims, in which said vinyl polymer having at least one carbosiloxane-dendrimer-derived unit comprises at least one tri[tri(trimethylsiloxy)silylethyldimethylsiloxy]silylpropyl carbosiloxane- dendrimer-derived unit, corresponding to one of the formulae:

6. The composition as claimed in any one of the preceding claims, in which said vinyl polymer having at least one carbosiloxane-dendrimer-derived unit is present in a content with respect to active material ranging from 0.5% to 20% by weight, relative to the total weight of the composition, in particular ranging from 3% to 15% by weight, and more particularly ranging from 4% to 13% by weight, more preferably ranging from 5% to 12% with respect to active material of vinyl polymer having at least one carbosiloxane- dendrimer-derived unit.

7. The composition as claimed in any one of the preceding claims, in which said microwax is selected from waxes that are solid and hard at ambient temperature, of animal, plant, mineral or synthetic origin, and mixtures thereof.

8. The composition as claimed in any one of the preceding claims, in which said micro wax is present in the form of particles having a mean size ranging from 0.5 to 50 microns, in particular from 1 μm to 30 μm, and more particularly from 3 μm to 20 μm.

9. The composition as claimed in any one of the preceding claims, in which said micro wax has a number-average molar mass of between 300 and 10 000 g/mol, and preferably between 400 and 3000 g/mol.

10. The composition as claimed in any one of the preceding claims, said composition comprising from 1% to 15% at least by weight of micro wax, relative to the total weight of the composition, in particular from 2% to 10%, and more particularly from 3.5% to 8% by weight of microwax, relative to the total weight of the composition.

11. The composition as claimed in any one of the preceding claims, in which said vinyl polymer having at least one carbosiloxane-dendrimer-derived unit and said microwax are present in a ratio by weight ranging from 1 to 10, especially from 1 to 8, in particular from 1.5 to 5, and more particularly ranging from 1.5 to 3.

12. The composition as claimed in any one of the preceding claims, comprising at least one liquid fatty phase.

13. The composition as claimed in any one of the preceding claims, comprising at least one lipophilic gelling agent.

14. The composition as claimed in any one of the preceding claims, comprising at least one colorant.

15. The composition as claimed in any one of the preceding claims, said composition being a foundation.

16. The use, in a cosmetic composition for making up and/or caring for the skin, of at least one vinyl polymer having at least one carbosiloxane-dendrimer-derived unit in combination with at least one microwax in a ratio by weight of greater than or equal to 1, for conferring on said composition improved mattness staying power.

17. A nontherapeutic method for making up and/or caring for the skin, comprising at least one step of applying, to said skin, at least one layer of a composition as claimed in any one of claims 1 to 15.