Cosmetic composition comprising an oily dispersion of polymer particles and an aqueous microdispersion of wax particles.

Abstract

Title of the invention: Cosmetic composition comprising an oily dispersion of polymer particles and an aqueous microdispersion of wax particles. The present application relates to the field of makeup of keratin materials, in particular of the skin, eyelashes and eyebrows. It relates more particularly to a composition comprising, preferably in a cosmetically acceptable medium, at least: - an oily dispersion which comprises: i) one or more particles comprising: a) one or more ethylenic copolymer(s) of a1) (C1-C4)(alkyl)acrylate of (C1-C4)alkyl, and of a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups such as benzyl; in particular a2) is a (C1-C4)(alkyl)acrylic acid, more particularly copolymers of (C1-C4)alkyl (meth)acrylate and of (meth)acrylic acid;and ii) one or more polymeric stabilizing agent(s) selected from: b) polymers of (C1-C6)(alkyl)acrylate of (C3-C12)cycloalkyl monomers such as isobornyl (meth)acrylates; and c) copolymers of c1) (C1-C6)(alkyl)acrylate of (C3-C12)cycloalkyl such as isobornyl (meth)acrylates and c2) (C1-C4)(alkyl)acrylate of (C1-C4)alkyl such as (C1-C4)alkyl (meth)acrylate; andiii) one or more hydrocarbon oil(s); and - an aqueous microdispersion of wax particles.;

Description

Title of the invention: Cosmetic composition comprising an oily dispersion of polymer particles and an aqueous microdispersion of wax particles.

[0001] The present application relates to the field of makeup of keratin materials, in particular of the skin, eyelashes and eyebrows. It relates more particularly to a composition comprising, preferably in a cosmetically acceptable medium, at least: - an oily dispersion which comprises:

[0002] i) one or more particles comprising:

[0003] a) one or more ethylenic copolymer(s) of aj (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl, and of a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups; in particular a2) is a (Ci-C4)(alkyl)acrylic acid; and

[0004] ii) one or more polymeric stabilizing agent(s) chosen from:

[0005] b) polymers of (C3-Ci2) cycloalkyl (CrC6) (alkyl)acrylate monomers; and

[0006] c) copolymers of (C3-Ci2) cycloalkyl (CrC6) (alkyl)acrylate and (CrC4) alkyl (CrC4) (alkyl)acrylate; and

[0007] iii) one or more hydrocarbon oil(s) and - an aqueous microdispersion of wax particles.

[0008] The invention also relates to a method for making up and / or caring for keratin materials consisting of applying to the surface of said materials at least one composition as defined above.

[0009] Cosmetic makeup compositions are commonly used to provide an aesthetic color to keratin materials such as skin, eyelashes and eyebrows, but also to beautify irregular skin by hiding spots and dyschromia, and reducing the visibility of relief imperfections such as pores and wrinkles.

[0010] They can also be used to correct and harmonize the appearance of eyelashes or eyebrows. Many formulations have been developed to date. For several years, consumers have been looking for compositions that provide good makeup effect over time, particularly makeup that withstands daily showering or bathing in the presence of hot water and detergent surfactants, sweat and sebum in order to avoid having to reapply the composition too often.

[0011] There are semi-permanent makeup techniques such as tattooing and in particular the techniques of "microblading" and "microshading" which consist of inserting, using a needle, a colored pigment under the superficial layers of the skin. The application is painful, irreversible and very expensive unlike common makeup products which are very comfortable but do not generally allow long-lasting wear beyond one day.

[0012] Aqueous makeup formulations containing film-forming polymers dispersed in water such as latexes are highly resistant to sebum but do not withstand the test of showering or bathing (hot water and detergent surfactants).

[0013] Anhydrous formulations containing film-forming polymers in isododecane are water-resistant. However, these compositions are sensitive to sebum and, upon contact with it, tend to produce a sticky, tacky deposit.

[0014] There is therefore a need to find new compositions for semi-permanent makeup and / or care of keratin materials without the drawbacks of the techniques and formulations known from the prior art. It is sought to obtain formulations which are stable, comfortable and long-lasting on keratin materials and in particular which are resistant to hot water and to surfactants and sebum.

[0015] Unexpectedly, the applicant found during its research that it is possible to achieve this objective with a composition comprising, preferably in a cosmetically acceptable medium, at least: - an oily dispersion which comprises:

[0016] i) one or more particles comprising:

[0017] a) one or more ethylenic copolymer(s) of aj (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl, and of a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups; in particular a2) is a (CrC4)(alkyl)acrylic acid; and

[0018] ii) one or more polymeric stabilizing agent(s) chosen from:

[0019] b) polymers of (Ci-C6) (alkyl)acrylate of (C3-Ci2) cycloalkyl monomers; and

[0020] c) copolymers of (Ci) (Ci-C6) (alkyl)acrylate of (C3-Ci2) cycloalkyl and (Ci) (Ci-C4) (alkyl)acrylate of (Ci-C4) alkyl; and iii) one or more hydrocarbon oil(s) and - an aqueous microdispersion of wax particles.

[0021] This discovery is the basis of the invention. Objects of the invention

[0022] Thus, a first object of the present invention is a composition comprising, preferably in a cosmetically acceptable medium, at least: - an oily dispersion which comprises:

[0023] i) one or more particles comprising:

[0024] a) one or more ethylenic copolymer(s) of aj (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl, and of a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups; in particular a2) is a (Ci-C4)(alkyl)acrylic acid; and

[0025] ii) one or more polymeric stabilizing agent(s) chosen from:

[0026] b) polymers of (Ci-C6) (alkyl)acrylate of (C3-Ci2) cycloalkyl monomers; and

[0027] c) copolymers of (Ci) (Ci-C6) (alkyl)acrylate of (C3-Ci2) cycloalkyl and (Ci) (Ci-C4) (alkyl)acrylate of (Ci-C4) alkyl; and

[0028] iii) one or more hydrocarbon oil(s) and - an aqueous microdispersion of wax particles.

[0029] A second subject of the present invention is a method for making up and / or caring for keratin materials consisting of applying to the surface of said materials at least one composition as defined above. Definitions

[0030] In the context of the present invention, the term "keratin fibers" means the skin, eyelashes and eyebrows. This term "keratin fibers", within the meaning of the present invention, also extends to synthetic false eyelashes.

[0031] By "physiologically acceptable" is meant compatible with the skin and its appendages, which has a pleasant color, odor and feel and which does not generate unacceptable discomfort (tingling, tightness), likely to deter the consumer from using this composition. - an “alkyl radical” is a saturated hydrocarbon group of CrC8, linear or branched, in particular of C1-C6, preferably of C1-C4 such as methyl, ethyl, n-propyl, isopropyl or i-propyl, n-butyl, isobutyl or i-butyl and tert-butyl or t-butyl; - an “alkylene radical” is a divalent saturated hydrocarbon group of C1-C8, linear or branched, in particular C1-C6, preferably C1-C4 such as methylene, ethylene, or propylene; - a “cycloalkyl” radical is a saturated cyclic hydrocarbon group comprising from 1 to 3 rings, preferably 2 rings, and comprising from 3 to 13 carbon atoms, preferably between 5 and 10 carbon atoms, and which may be substituted by one or more (Ci-C4)alkyl groups such as methyl such as cyclopentyl, cyclohexyl, cycloheptyl, norbornyl, or isobornyl, preferably the cycloalkyl radical is an isobornyl group. - a “cyclic” radical is a cyclic hydrocarbon group, saturated or unsaturated, aromatic or non-aromatic, comprising from 1 to 3 cycles, preferably 1 cycle, and comprising from 3 to 10 carbon atoms such as cyclohexyl or phenyl; an “aryl” radical is an unsaturated aromatic cyclic radical, comprising from 6 to 12 carbon atoms, mono or bicyclic, fused or not, preferably the aryl group comprises 1 cycle and 6 carbon atoms such as phenyl; - an “aryloxy” radical is an aryl-oxy radical i.e. aryl-O- with aryl as defined above, preferably phenoxy; - an “aryl(Ci-C4)alkoxy” radical is an aryl-(Ci-C4)alkyl-O- radical, preferably benzoxy; - by "insoluble monomer" we therefore mean any monomer whose homopolymer or copolymer is not in soluble form, i.e. completely dissolved at a concentration greater than 5% by weight at room temperature (20°C) in said medium. - by “ethylenic homopolymer” we mean a polymer resulting from the polymerization of identical monomers; - by "ethylenic copolymer" is meant a polymer resulting from the polymerization of different monomers, in particular at least 2 different monomers. Preferably, the ethylenic copolymer of the invention is derived from 2 or 3 different monomers; - by "ethylenic monomer" is meant an organic compound comprising one or more unsaturations of the >C=C< type, conjugated or not, capable of polymerizing; - by "soluble monomer" is meant any monomer whose homopolymer or copolymer, preferably homopolymer, is soluble at least 5% by weight, at 20°C, in the liquid hydrocarbon fatty substance(s) iii) of the dispersion. The homopolymer is completely dissolved in the carbon liquid(s) iii), visually at 20°C, i.e. no deposit, precipitate, agglomerate or insoluble sediment is visually noted. - by "fatty substance" is meant an organic compound immiscible in water at ordinary room temperature (25°C) and at atmospheric pressure (760 mm Hg) (solubility less than 5% and preferably 1%, even more preferably 0.1%). They have in their structure at least one hydrocarbon chain comprising at least 6 carbon atoms or a chain of at least two siloxane groups. In addition, fatty substances are generally soluble in organic solvents under the same temperature and pressure conditions, such as, for example, ethanol, ether, vaseline oil or decamethyl cyclopentasiloxane. These fatty substances are neither polyoxyethylenated nor polyglycerolated. They are different from fatty acids because salified fatty acids constitute soaps which are generally soluble in aqueous media; - by “liquid” fatty substance, we mean in particular a fatty substance which is liquid at 25°C and 1 atmosphere, preferably said fatty substance has a viscosity less than or equal to 7000 centipoises at 20°C;

[0032] - by “hydrocarbon” fatty substance we mean a fatty substance which comprises at least 50% by weight, in particular from 50 to 100% by weight, for example from 60 to 99% by weight, or from 65 to 95% by weight, or even from 70 to 90% by weight, relative to the total weight of said fatty substance, of carbon compound, having an overall solubility parameter according to the HANSEN solubility space of less than or equal to 20 (MPa)1 / 2, or of a mixture of such compounds; - The overall solubility parameter ô according to the HANSEN solubility space is defined in the article "Solubility parameter values" by Grulke, in the work "Polymer Handbook" 3rd edition, Chapter VII, pages 519-559 by the relation ô = ( dD2 + dP2 + dH2)1 / 2 in which: - dD characterizes the LONDON dispersion forces resulting from the formation of dipoles induced during molecular shocks, - dP characterizes the DEBYE interaction forces between permanent dipoles, - dH characterizes the specific interaction forces (hydrogen bond type, acid / base, donor / acceptor, etc.); The definition of solvents in the three-dimensional solubility space according to HANSEN is described in the article by HANSEN: "The three-dimensional solubility parameters" J. Paint Technol. 39, 105 (1967); - “oil” means a fatty substance which is liquid at room temperature (25°C) and atmospheric pressure; - "hydrocarbon oil" means an oil formed essentially, or even consisting of, carbon and hydrogen atoms, and possibly oxygen and nitrogen atoms, and not containing silicon or fluorine atoms. It may contain hydroxy, ester, ether, carboxylic acid, amine and / or amide groups; - "volatile oil" means an oil (or non-aqueous medium) capable of evaporating on contact with keratin materials, in particular the skin, in less than one hour, at room temperature and atmospheric pressure. The volatile oil is a volatile cosmetic oil, liquid at room temperature, having in particular a non-zero vapor pressure, at room temperature and at atmospheric pressure, in particular, having a vapor pressure ranging from 0.13 Pa to 40,000 Pa (103 to 300 mm Hg), and preferably, ranging from 1.3 Pa to 13,000 Pa (0.01 to 100 mm Hg), and preferentially ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mm Hg); - “non-volatile oil” means an oil having a vapour pressure of less than 0.13 Pa at room temperature and atmospheric pressure;

[0033] Oily dispersion of solid polymer particles

[0034] The dispersions according to the invention therefore consist of particles, generally spherical, of at least one polymer i) stabilized on the surface by one or more stabilizing agents ii), in a non-aqueous medium.

[0035] In order to obtain the dispersion, it is proposed to polymerize particular monomers capable of forming the polymeric core i) in the presence of a polymeric statistical stabilizing agent ii) comprising a majority of a soluble part ii) and a minority of an insoluble part i) in the dispersion medium i.e. in the liquid hydrocarbon fatty substance(s) iii) optionally containing iv) water.

[0036] Preferably, said particles i) are not, or only slightly, crosslinked.

[0037] The polymer particles i) and the stabilizing agent(s) ii) are found in preferably in the liquid hydrocarbon fatty body(ies) iii) in an amount of between 2 and 40% by weight, in particular between 4 and 35% by weight of soluble monomer (that forming the stabilizing agent(s) ii)) and between 60% and 98% by weight, in particular from 65 to 96% by weight of insoluble monomer (that forming the particles i)). Polymer particles i)

[0038] The particle(s) i) of the dispersion of the process of the invention is (are) composed of one or more ethylenic copolymer(s) resulting from the polymerization a1) of at least one (Ci-C4)(alkyl)acrylate monomer of (Ci-C4)alkyl and a2) of at least one ethylenic monomer comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups; in particular a2) is a (Ci-C4) (alkyl)acrylic acid.

[0039] Preferably, the particle(s) i) is (are) made up of an ethylenic polymer core derived from copolymers a), as defined above.

[0040] By "ethylenic copolymer" is meant a polymer resulting from the polymerization of two monomers: monomer a1) (Ci-C4)(alkyl)acrylate of (CrC4)alkyl and monomer a2) ethylenic comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups such as phenyl.

[0041] By "ethylenic monomer" is meant a compound comprising at least one ethylenic unsaturation -(Ra)C=C(Rb)-, -C(Ra)=C(Rb)-Rc or >C=C(Ra)-Rb, with Ra, Rb, and Rc, identical or different, representing a hydrogen atom or a (Ci-C4)alkyl group such as methyl, preferably hydrogen.

[0042] The ethylenic compound may also be a cyclic compound, preferably having 5 or 6 members, and comprising ethylenic unsaturation.

[0043] By ethylenic monomer comprising “one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups” is meant that the monomer is substituted on one of the carbon atoms of the polymeric monomer by one or more groups, preferably a single group, selected from carboxy -C(O)-OH, phosphoric acid -OP(O)(OH)2 or -P(O)(OH)2, and sulfonic acid -OS(O)2-OH or -S(O)2-OH, maleic anhydride, and aryl such as phenyl.

[0044] According to one embodiment of the invention, the particle(s) i) comprise a) ethylenic copolymers of aj (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl, and a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups such as benzyl.

[0045] More particularly, the ethylenic monomers a2) comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups are chosen from (1), (2), (3), (4) and (5):

[0046] (1) Ri(R2)C=C(R3)-Acid with Rb R2 and R3 representing a hydrogen atom or a CO2H, H2PO4, or SO3H group, and Acid representing a carboxy, phosphoric acid, sulfonic acid group, preferably carboxy, preferably carboxy, preferably (1) represents (5) H2C=C(R)-C(O)-OH with R representing a hydrogen atom, or a (Ci-C4) alkyl group such as methyl;

[0047] (2) H2C=C(R)-C(O)-N(R')-Alk-Acid with R and R', identical or different represent a hydrogen atom, or a (CrC4)alkyl group; Alk represents a group (Ci-C6)alkylene optionally substituted by at least one group chosen from Acid as defined above and hydroxy; and Acid is as defined above, preferably carboxy or sulfonic acid;

[0048] (3) Ar-(Ra) C=C(Rb)-Rc with Ra, Rb and Rc, identical or different, represent a hydrogen atom or a (CrC4)alkyl group, and Ar represents an aryl group, preferably benzyl, optionally substituted by at least one acid group CO2H, H2PO4, or SO3H, preferably substituted by a CO2H, or SO3H group)

[0049] (4) Maleic anhydride of formula (4a) and (4b):

[0050] [Chem.3] Formulas (4b) and (4b) in which Ra, Rb and Rc, identical or different, represent a hydrogen atom or a (CrC4) alkyl group, preferably Ra, Rb, and Rc represent a hydrogen atom. Preferably, the ethylenically unsaturated anhydride monomer of the invention is of formula (4b) and more preferably is maleic anhydride; and more particularly a2) is chosen from (1) and (4), in particular (4) and (5).

[0051] According to a particular variant of the invention, a2) is a (CrC4) (alkyl)acrylic acid, more particularly b) is(are) copolymers of (Ci-C4)alkyl (meth)acrylate and (meth)acrylic acid.

[0052] According to another variant of the invention a2) is chosen from crotonic acid, maleic anhydride, itaconic acid, fumaric acid, maleic acid, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid, acrylic acid, acrylamiopropanesulfonic acid, acrylamidoglycolic acid, and their salts, more preferably a2) represents maleic anhydride

[0053] The salts may be chosen from alkali metal salts, for example sodium, potassium; alkaline earth metal salts, for example calcium, magnesium, strontium, metal salts, for example zinc, aluminum, manganese, copper; ammonium salts of formula NH4+; quaternary ammonium salts; organic amine salts, such as for example methylamine, diethylamide, trimethylamine, triethylamine, ethylamine, 2-hydroxyethylamine, bis-(2-hydroxyethyl)amine, tri-(2-hydroxyethyl)amine salts; lysine, arginine salts.

[0054] According to a preferred embodiment of the invention, the monomer(s) (CrC4) (alkyl)acrylate of (Ci-C4)alkyl ai) are chosen from those of formula (I):

[0055] [Chem.2] HSC=C(RÎ-C(Ô>-O-R' (0

[0056] Formula (I) in which:

[0057] - R representing a hydrogen atom or (Ci-C4)alkyl group such as methyl, and

[0058] - R' representing a (CrC4)alkyl group such as methyl, ethyl, n-propyl, i- propyl, n-butyl, i-butyl, t-butyl, preferably methyl, ethyl or i-butyl,

[0059] preferably (I) represents a C1-C4 alkyl acrylate such as methyl acrylate, ethyl acrylate, isobutyl acrylate and isobutyl methacrylate.

[0060] According to another particular embodiment of the invention, the polymer constituting the particles i) is an ethylenic acrylate copolymer a) resulting from the polymerization: - aO of at least one monomer of formula (I) as defined above, preferably C1-C4 alkyl acrylate such as methyl acrylate, ethyl acrylate, isobutyl acrylate and isobutyl methacrylate; and - a2) of at least one monomer chosen from (1), (2), (3), and (4) as defined previously and preferably of formula (II) as well as its salts:

[0061] [Chem.3] HaC=C(R)-C(O|-OH (Il) Formula (II) in which R as defined above, in particular (II) represents acrylic acid.

[0062] According to a preferred embodiment of the invention, the quantity in a2), in particular in compound (II) and in particular of acrylic acid, is greater than 2.5% by weight relative to the total weight of the particle i), more particularly between 3% and 35% by weight relative to the weight of monomers of the particle i), even more particularly between 5% and 25% by weight and the polymer of the particles i), better still between 10% and 15% by weight and the polymer of the particles i).

[0063] In particular a) is a copolymer resulting from the copolymerization a2) of acrylic acid with aj one or more C1-C4 alkyl (meth)acrylate monomers, preferably at least 2 different C1-C4 alkyl (meth)acrylate monomers, in particular chosen from methyl (meth)acrylate, ethyl (meth)acrylate and butyl (meth)acrylate, isobutyl (meth)acrylate.

[0064] According to another preferred embodiment of the invention, the polymer constituting the particles i) is an ethylenic acrylate copolymer a) resulting from the polymerization:

[0065] - of at least two different monomers: of formula (I) as defined previously, preferably Cr-C4 alkyl acrylate such as methyl acrylate, ethyl acrylate, isobutyl (meth)acrylate; and

[0066] - of at least one monomer chosen from (1), (2), (3), and (4) as defined previously preferably of formula (II) as defined above.

[0067] According to a particular embodiment of the invention, the polymer of the particles i) is a polymer derived from monomers aj of C1-C4 alkyl (meth)acrylate.

[0068] Advantageously, a linear or branched C1-C4 alkyl acrylate monomer, preferably linear, in particular (CrC3), is used. Preferably a) is chosen from methyl acrylate and ethyl acrylate.

[0069] The monomers a1) are preferably chosen from methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate and more preferably chosen from methyl (meth)acrylate, ethyl (meth)acrylate.

[0070] According to another particular embodiment of the invention, the polymer constituting the particles i) is an acrylate copolymer a) derived from: aj of at least one monomer of formula (I) as defined previously; and a2) of at least one ethylenically unsaturated anhydride monomer, in particular of formula (4) as defined previously.

[0071] In particular, the polymer of the particles a) is a polymer a,) of linear or branched C1-C4 alkyl (meth)acrylate monomer, preferably linear, in particular (CrC3) alkyl, and a2) of ethylenically unsaturated anhydride monomer.

[0072] The monomers a,) are preferably chosen from methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate.

[0073] Advantageously, one or two different monomers ai) of linear or branched C1-C4 alkyl acrylate, preferably linear, in particular (CrC3), are used. Preferably ai) is chosen from methyl acrylate and ethyl acrylate.

[0074] According to a particular embodiment, one or two different monomers of branched (C3-C4)alkyl (meth)acrylate are used. Preferably, a1) is chosen from isobutyl acrylate and isobutyl methacrylate.

[0075] According to a particular form of the invention, the ethylenically unsaturated anhydride compound(s) a2) of the invention are chosen from the derivatives of maleic anhydride (4a) and itaconic anhydride (4b) as defined above.

[0076] More preferably, the ethylenically unsaturated anhydride monomer of the invention is of formula (4a) and even more preferably is maleic anhydride.

[0077] The polymer of the particles may be chosen from: methyl acrylate / maleic anhydride copolymers; ethyl acrylate / maleic anhydride copolymers; and methyl acrylate / ethyl acrylate / maleic anhydride copolymers.

[0078] According to a preferred embodiment of the invention, the copolymer(s) of the particles i) of the oily dispersion comprise, from 80 to 95% by weight, of the ingredient ai) and from 5 to 20% by weight of the ingredient a2), relative to the total weight of the copolymer(s).

[0079] More particularly, the polymer of the particles i) preferably comprises from 80 to 93% by weight of the ingredient a), in particular C1-C4 alkyl (meth)acrylate and from 7 to 20% by weight of the ingredient a2) relative to the total weight of the polymer i). More preferably, the polymer of the particles i) preferably comprises from 85 to 93% by weight, more particularly 87% to 92% by weight, even more preferably from 85% to 90% by weight, of the ingredient a1), in particular alkyl (meth)acrylate in C1-C4 and from 10 to 20% by weight of ingredient a2) relative to the total weight of the polymer.

[0080] Advantageously, the polymer of the particles i) is a non-crosslinked polymer.

[0081] According to one embodiment of the invention, the copolymers i) are chosen from: - methyl acrylate / ethyl acrylate / acrylic acid copolymers and its salts; - methyl acrylate / ethyl acrylate / maleic anhydride copolymers; - methyl acrylate / acrylic acid copolymers and its salts; - ethyl acrylate / acrylic acid copolymers and its salts; - methyl acrylate / maleic anhydride copolymers; and - ethyl acrylate / maleic anhydride copolymers. - isobutyl acrylate / acrylic acid copolymers and its salts - isobutyl acrylate / isobutyl methacrylate / acrylic acid copolymers and its salts.

[0082] The polymer of the particles i) of the dispersion preferably has a number average molecular weight ranging from 2,000 to 10,000,000 g / mol.

[0083] The polymer of the particles i) may be present in the dispersion (A) in a content ranging from 20 to 60% by weight, relative to the total weight of the dispersion, in particular between 21% and 58.5% by weight, relative to the total weight of the dispersion, preferably ranging from 30 to 50% by weight, relative to the total weight of the dispersion, more preferably ranging from 36% to 42% by weight relative to the total weight of the dispersion (A).

[0084] Preferably the particle(s) i) consist of a copolymer of a1) and a2).

[0085] According to a particular embodiment of the invention, the particles i) are made up of copolymers resulting from the polymerization of monomers aj and a2) with a weight ratio a1) / a2) of between 4.4 and 20, more particularly between 5.5 and 19, preferably between 6.5 and 16, even more preferably between 6.6 and 15.6.

[0086] The polymer particle(s) i) of the dispersion (A) preferably have a number-average size ranging from 5 to 600 nm, in particular ranging from 10 to 500 nm, and better still ranging from 20 to 400 nm. The stabilizing agent(s) ii)

[0087] The dispersion (A) according to the invention also comprises one or more stabilizing agents ii). Preferably, only one type of stabilizing agent ii) is used in the invention.

[0088] The stabilizing agent(s) of the invention is (are) composed of ethylenic polymers chosen from b) polymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl monomers; and c) copolymers of (Ci-C6)(alkyl)acrylate of (C3- Ci2)cycloalkyl and c2) (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl. Preferably, the stabilizing agent(s) of the invention is (are) composed of ethylenic polymers chosen from c) copolymers of cl) (Cl-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl and c2) (CrC4)(alkyl)acrylate of (CrC4)alkyl.

[0089] According to a preferred embodiment of the invention, the stabilizing agent ii) is (are) composed of ethylenic polymers chosen from: b) polymers of monomers of formula H2C=C(R)-C(O)-OR” (III) with R representing a hydrogen atom or (CrC4)alkyl group such as methyl, and R” representing a (C5-Ci0)cycloalkyl group such as norbornyl, or isobornyl, preferably isobornyl; and c) copolymers of Ci) H2C=C(R)-C(O)-OR” (III) in which R and R” have the same meanings indicated previously in b) and of

[0090] c2) H2C=C(R)-C(O)-O-R' (I) in which R has the same meaning as that in formula (III) and R' represents a (C i -C 4 )alkyl group.

[0091] According to a particular embodiment, the stabilizing agent(s) of the invention is (are) composed of ethylenic polymers chosen from b) polymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl monomers, particularly of formula (III) as defined above.

[0092] According to another particular embodiment of the invention, the stabilizing agent(s) of the invention is (are) composed of ethylenic polymers chosen from c) copolymers of cj (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl, particularly of formula (III) as defined above, and of c2) (Ci-C4) (alkyl)acrylate of (CrC4)alkyl, particularly of formula (I) as defined above.

[0093] According to a particular form of the invention, ingredient c2) is a (Ci-C4)alkyl (Ci-C4)alkyl (alkyl)acrylate monomer, in particular of formula (I), more particularly chosen from methyl (meth)acrylate and ethyl (meth)acrylate, more preferably methyl (meth)acrylate.

[0094] According to another particular form of the invention, ingredient c2) is a mixture of several different (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl monomers, in particular 2 different (CrC4)(alkyl)acrylate of (CrC4)alkyl monomers, in particular of formula (I) more particularly chosen from methyl (meth)acrylate and ethyl (meth)acrylate.

[0095] Particularly the stabilizing agent ii) is chosen from b) polymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl monomers; and c) random copolymers of (Ci) (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl and (Ci) (Ci-C4) (alkyl)acrylate of (Ci-C4)alkyl with a weight ratio of (Ci) / c2) greater than 4. Advantageously, said weight ratio ranges from 4.5 to 19. More advantageously, said weight ratio Ci) / c2) ranges from 5 to 15, more preferably said weight ratio ranges from 5.5 to 12.

[0096] More particularly, the stabilizing agent ii) is a polymer chosen from b) the homopolymer of isobornyl (meth)acrylate and c) the random copolymers Ci) of isobornyl (meth)acrylate and c2) of Ci-C4 alkyl (meth)acrylate, preferably present in a weight ratio of isobornyl (meth)acrylate / Ci-C4 alkyl (meth)acrylate ((ci) / c2)) greater than 4. Advantageously, said weight ratio Ci) / c2) ranges from 4.5 to 19. Advantageously, said weight ratio Ci) / c2) ranges from 5 to 15, more preferably said weight ratio Ci) / c2) ranges from 5.5 to 12.

[0097] For these statistical copolymers, the defined weight ratio makes it possible to obtain a stable polymer dispersion, in particular after storage for 7 days at room temperature.

[0098] Advantageously, the stabilizing agent is chosen from: b) homopolymers of isobornyl acrylate, c) random copolymers of isobornyl acrylate / methyl acrylate, random copolymers of isobornyl acrylate / ethyl acrylate, and random copolymers of isobornyl acrylate / methyl acrylate / ethyl acrylate according to the weight ratio described above.

[0099] The stabilizing polymer ii) preferably has a number average molecular weight ranging from 10,000 to 400,000, preferably ranging from 20,000 to 200,000 g / mol.

[0100] The stabilizer ii) is in contact with the surface of the polymer particles i) and thus makes it possible to stabilize these particles on the surface in order to maintain these particles in dispersion in the medium of the dispersion (A).

[0101] More particularly, the stabilizing agent(s) ii) are chosen from c) copolymers of: (Ci) (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl; and c2) (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl; with 80 to 95% by weight of ingredient cl) in particular isobornyl (meth)acrylate and 5 to 20% by weight of ingredient c2) in particular methyl acrylate and ethyl acrylate relative to the total weight of the stabilizing agent.

[0102] More preferably, the stabilizing agent(s) ii) comprise from 85 to 94% by weight, more particularly 87% to 93% by weight, of ingredient Ci) in particular isobornyl (meth)acrylate and from 10 to 20% by weight of ingredient c2) in particular ethyl acrylate and / or ethyl acrylate relative to the total weight of the polymer.

[0103] Advantageously, the set ii) stabilizing agent(s) + i) polymer particle(s) present in the dispersion (A) comprises from 5 to 60%, in particular comprises from 10 to 40% by weight of polymers b) or c) and from 60 to 90%, in particular from 61 to 89% by weight of polymers a), relative to the total weight of the assembly ii) stabilizing agent(s) + i) polymer particle(s).

[0104] Preferably, the assembly ii) stabilizing agent(s) + i) polymer particle(s) present in the dispersion comprises from 15 to 30% by weight of polymers b) or c) and from 70 to 85% by weight of polymers a), relative to the total weight of the assembly ii) stabilizing agent(s) + i) polymer particle(s).

[0105] Preferably, the stabilizing agent(s) ii) and the particle(s) i) have a number-average molecular weight (Mn) of between 1000 and 1,000,000 g / mol, in particular between 5,000 and 500,000 g / mol and even better between 10,000 and 300,000 g / mol.

[0106] The dispersion (A) according to the invention is ultimately formed of polymeric particles, of a fairly large diameter, i.e. preferably greater than 100 nm, and leads to film-forming deposits, shiny and resistant to fatty substances at room temperature (25°C), of particular interest for makeup applications.

[0107] The final particle size is greater than 100 nm. In particular a number average size ranging from 100 nm to 600 nm; more particularly ranging from 150 nm to 500 nm, even more particularly ranging from 160 nm to 400 nm.

[0108] The average particle size is determined by conventional methods known to those skilled in the art. A MALVERN brand laser granulometer, NanoZS model (particularly well suited to submicron dispersions) is used to measure the size distribution of these samples. The operating principle of this type of device is based on dynamic light scattering (DLS), also called quasi-elastic light scattering (QELS) or photon correlation spectroscopy (PCS).

[0109] The sample is pipetted into a disposable plastic cuvette (4 transparent sides, 1 cm side and 4 mL capacity) placed in the measuring cell. The data are analyzed on the basis of a cumulant method which leads to a unimodal particle size distribution characterized by an average diameter in intensity d(nm) and a polydispersity factor in sizes Q. The results can also be expressed in the form of statistical data such as D10; D50 (median), D90 and mode.

[0110] Other granulometry techniques make it possible to obtain this type of information, such as analysis of individual particle tracking (Nanoparticle Tracking Analysis, NTA), laser diffraction (LD), acoustic extinction spectroscopy (AES), spatial filter Doppler velocimetry or image analysis. [YES] The hydrocarbon oil(s) iii)

[0112] The oily medium of the polymer dispersion comprises at least one hydrocarbon oil iii).

[0113] Hydrocarbon oil is a liquid oil at room temperature (25°C) and atmospheric pressure.

[0114] By hydrocarbon oil is meant an oil formed essentially, or even consisting of, carbon and hydrogen atoms, and possibly oxygen and nitrogen atoms, and not containing silicon or fluorine atoms. It may contain alcohol, ester, ether, carboxylic acid, amine and / or amide groups.

[0115] The hydrocarbon oil can be chosen from: - hydrocarbon oils having 8 to 14 carbon atoms, and in particular: - branched C8-Ci4 alkanes such as C8-Ci4 isoalkanes of petroleum origin (also called isoparaffins) such as isododecane (also called 2,2,4,4,6-pentamethylheptane), isodecane, and for example oils sold under the trade names Isopars' or Permetyls, - linear alkanes, for example such as n-dodecane (Ci2) and n-tetradecane (CM) sold by Sasol respectively under the references PARAFOL 12-97 and PARAFOL 14-97, as well as their mixtures, the undecane-tridecane mixture, the mixtures of n-undecane (Cn) and n-tridecane (Cn) obtained in examples 1 and 2 of application WO2008 / 155059 from Cognis, and their mixtures, - hydrocarbon oils of vegetable origin such as triglycerides consisting of esters of fatty acids and glycerol, the fatty acids of which may have chain lengths varying from C4 to C24, the latter being able to be linear or branched, saturated or unsaturated; these oils are in particular triglycerides of heptanoic acid or octanoic acid, or even wheat germ, sunflower, grape seed, sesame, corn, apricot, castor, shea, avocado, olive, soybean, sweet almond, palm, rapeseed, cotton, hazelnut, macadamia, jojoba, alfalfa, poppy, pumpkin, sesame, squash, rapeseed, blackcurrant, evening primrose, millet, barley, quinoa, rye, safflower, candlenut, passionflower, musk rose oils; shea butter;or even the triglycerides of caprylic / capric acids such as those sold by the company Stéarineries Dubois or those sold under the names Miglyol 810®, 812® and 818® by the company Dynamit Nobel; - synthetic ethers having 10 to 40 carbon atoms; - linear or branched hydrocarbons, of mineral or synthetic origin such as petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam ®, squalane, paraffin oils, and their mixtures, - synthetic esters such as oils of formula RiCOOR2 in which R।represents the residue of a linear or branched fatty acid containing from 1 to 40 carbon atoms and R2 represents a hydrocarbon chain, in particular a branched one, containing from 1 to 40 carbon atoms provided that Ri + R2 is3 10, such as for example Purcellin oil (cetostearyl octanoate), isopropyl myristate, isopropyl palmitate, benzoates of C12 to C15 alcohols, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, isostearyl isostearate, 2-hexyl-decyl laurate, 2-octyl-decyl palmitate, 2-octyl-dodecyl, heptanoates, octanoates, decanoates or ricinoleates of alcohols or polyalcohols such as propylene glycol dioctanoate; hydroxylated esters such as isostearyl lactate, di-isostearyl malate, 2-octyl-dodecyl lactate;polyol esters and pentaerythritol esters, - fatty alcohols which are liquid at room temperature with a branched and / or unsaturated carbon chain having from 12 to 26 carbon atoms such as octyl dodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol, and 2-undecylpentadecanol.;

[0116] Advantageously, the hydrocarbon oil(s) of the invention are formed solely of carbon and hydrogen atoms.

[0117] Preferably, the oily dispersion comprises at least one hydrocarbon oil iii) formed solely of carbon and hydrogen atoms, preferably chosen from:

[0118] - linear or branched C8-C30 alkanes, in particular C10-C20, plus particularly in Ci0-Ci6, volatile or non-volatile; preferably volatile

[0119] - cyclic, non-aromatic, C5-Ci2 alkanes; volatile or non-volatile; of preferably volatile, and

[0120] - their mixtures.

[0121] The hydrocarbon oil(s) are preferably chosen from hydrocarbon oils having from 8 to 16 carbon atoms, in particular having from 10 to 14 carbon atoms, preferably volatile, more particularly the apolar oils, described above.

[0122] Among the branched C8-Ci6 alkanes, in particular Cw-Cu, suitable as liquid hydrocarbon fatty bodies iii) in the dispersion of the invention, mention may be made of:

[0123] - isoalkanes of petroleum origin (also called isoparaffins) such as isododecane (also called 2,2,4,4,6-pentamethylheptane), isodecane and for example oils sold under the trade names Isopars' or Permetlys;

[0124] - linear alkanes, for example such as n-dodecane (Ci2) and n-tetradecane (Ci4) sold by Sasol respectively under the references PARAFOL 12-97 and PARAFOL 14-97, as well as their mixtures, the undecane-tridecane mixture, the mixtures of n-undecane (Cn) and n-tridecane (Cn) from Cognis, and mixtures thereof.

[0125] Preferably, the liquid hydrocarbon oil(s) iii) of the invention are formed solely of carbon and hydrogen atoms, more particularly isododecane.

[0126] According to another advantageous embodiment of the invention, the hydrocarbon oil(s) are a mixture of non-volatile oil and volatile oil, preferably the mixture comprises isododecane as volatile oil. In particular, in the mixture, the non-volatile oil is a phenylated silicone oil, preferably chosen from pentaphenylated silicone oils.

[0127] Preferably, the liquid hydrocarbon oil(s) iii) are present in the dispersion of the invention in an amount of between 15% by weight and 80% by weight, more preferably between 20% and 60% by weight relative to the total weight of said oily dispersion. According to a particular embodiment of the invention, the weight ratio of the sum of the ingredients [i) + ii)] / iii) is less than or equal to 1, more particularly [i) + ii]] / iii) the mass ratio is between 0.5 and 1.

[0128] The polymer particles i) of the dispersion preferably have an average size, in particular in number, ranging from 50 to 500 nm, in particular ranging from 75 to 400 nm, and better still ranging from 100 to 250 nm.

[0129] Generally speaking, the dispersion according to the invention can be prepared in the following manner, given by way of example. Non-volatile oils

[0130] According to a particular form of the invention, the composition according to the invention comprises at least one non-volatile oil.

[0131] By "oil" is meant a non-aqueous compound, immiscible with water, liquid at room temperature (25°C) and atmospheric pressure (760 mm Hg).

[0132] By "non-volatile oil" is meant an oil remaining on the keratin fiber at room temperature and atmospheric pressure for at least several hours and in particular having a vapor pressure of less than 103 mm Hg (0.13 Pa).

[0133] These oils can be hydrocarbon oils, silicone oils, or mixtures thereof.

[0134] The term “hydrocarbon oil” means an oil containing mainly hydrogen and carbon atoms and possibly oxygen, nitrogen, sulfur, phosphorus atoms.

[0135] For the purposes of the present invention, the term “silicone oil” means an oil comprising at least one silicon atom, and in particular at least one Si-O group.

[0136] As non-volatile hydrocarbon oil, we can notably cite: - hydrocarbon oils of plant origin such as triesters of fatty acids and glycerol, the fatty acids of which may have chain lengths varying from C4 to C24, the latter being able to be linear or branched, saturated or unsaturated; these oils include wheat germ, sunflower, grape seed, sesame, corn, apricot, castor, shea, avocado, olive, soybean, sweet almond, palm, rapeseed, cottonseed, hazelnut, macadamia, jojoba, alfalfa, poppy, pothnarron, sesame, pumpkin, rapeseed, blackcurrant, evening primrose, millet, barley, quinoa, rye, safflower, candlenut, passionflower, and musk rose; or even the triglycerides of caprylic / capric acids such as those sold by the company Stéarineries 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 paraffin oils and their derivatives, polydecenes, polybutenes, hydrogenated polyisobutene such as Parléam, squalane; - synthetic ethers having 10 to 40 carbon atoms; - synthetic esters such as oils of formula RiCOOR2 in which Ri represents the residue of a linear or branched fatty acid containing from 1 to 40 carbon atoms and R2 represents a hydrocarbon chain, in particular a branched chain, containing from 1 to 40 carbon atoms provided that Ri + R2 is > 10, such as for example Purcellin oil (cetostearyl octanoate), isopropyl myristate, isopropyl palmitate, C12 to C15 alcohol benzoate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, isostearate isostearate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols such as propylene glycol dioctanoate; hydroxylated esters such as isostearyl lactate, diisostearyl malate; and pentaerythritol esters; - fatty alcohols which are liquid at room temperature with a branched and / or unsaturated carbon chain having from 12 to 26 carbon atoms such as octyl dodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol, 2-undecylpentadecanol; - higher fatty acids such as oleic acid, linoleic acid, linolenic acid; and mixtures thereof.

[0137] The non-volatile silicone oils that can be used in the composition according to the invention may be non-volatile polydimethylsiloxanes (PDMS), polydimethylsiloxanes comprising alkyl or alkoxy groups, pendant and / or at the end of the silicone chain, groups each having from 2 to 24 carbon atoms, phenyl silicones such as phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, 2-phenylethyl trimethylsiloxysilicates.

[0138] According to a preferred form of the invention, the non-volatile oil or oils are present in the composition in a total concentration of less than 10.0% by weight relative to the total weight of the composition. Method of preparation of the dispersion

[0139] Without this being limiting, in general, the dispersion according to the invention can be prepared in the following manner:

[0140] - The polymerization is carried out in “dispersion” in a non-aqueous medium, i.e. by precipitation of the polymer being formed, with protection of the particles formed with one or more stabilizing agents ii), preferably a single type of stabilizing agent ii) chosen from b) and c) as defined above.

[0141] - In a first step, the stabilizing polymer (or stabilizing agent) is prepared ii)) by mixing the monomer(s) constituting the stabilizing polymer b) or c), with iv) a radical initiator, in a solvent called a synthesis solvent, and by polymerizing these monomers; then

[0142] - In a second step, stabilizing polymer ii) formed in step previous, the monomers constituting the polymer of the particles i) and the polymerization of these added monomers is carried out in the presence of the radical initiator.

[0143] - In a third step, water and all ingredients i) + ii) are added are stirred in the reactor before removing the dispersion. When the non-aqueous medium is a non-volatile hydrocarbon oil iii), the polymerization can be carried out in an apolar organic solvent (synthesis solvent) then the non-volatile hydrocarbon oil (which must be miscible with said synthesis solvent) is added and the synthesis solvent is selectively distilled.

[0144] The synthesis solvent may consist of hydrocarbon oil iii) combined with an additional solvent chosen in particular from esters with a linear or branched aliphatic hydrocarbon chain, having from 3 to 8 carbon atoms in total such as ethyl acetate, methyl acetate, propyl acetate, n-butyl acetate.

[0145] At the end of step 1, when the synthesis solvent is a mixture, the additional solvent including the aliphatic hydrocarbon chain esters as defined above is removed by a conventional method of those skilled in the art such as distillation. The polymers of the particles i) are found in the hydrocarbon oil iii).

[0146] A synthesis solvent is therefore chosen such that the monomers of the polymeric stabilizing agent(s) ii), and the radical initiator iv), are soluble therein, and that the polymer particles i) obtained are insoluble therein so that they precipitate therein during their formation.

[0147] In particular, the synthesis solvent is chosen which is apolar and volatile organic, preferably chosen from volatile hydrocarbon oils iii) in particular alkanes such as heptane, cyclohexane or isododecane, preferably isododecane.

[0148] When the non-aqueous medium is a volatile hydrocarbon oil iii), the polymerization can be carried out directly in said oil, which therefore also acts as a synthesis solvent. The monomers must also be soluble therein, as well as the radical initiator, and the polymer of the particles i) obtained must be insoluble therein.

[0149] The monomers are preferably present in the synthesis solvent, before polymerization, at a rate of 15% to 45% by weight. All of the monomers may be present in the solvent before the start of the reaction, or part of the monomers may be added as the polymerization reaction progresses.

[0150] The polymerization is preferably carried out in the presence iv) of one or more radical initiators which may be any initiator known to those skilled in the art for radical polymerization such as peroxidic initiators, azo initiators, oxidation-reduction couples (redox), and photochemical initiators.

[0151] We can notably cite those of the type: - peroxide in particular chosen from tert-Butyl peroxy-2-ethylhexanoate: Trigonox 21S; 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane: Trigonox 141; tert-butyl peroxypivalate: Trigonox 25C75 from AkzoNobel; or - azoic in particular chosen from AIBN: azobisisobutyronitrile; V50: 2,2'-azo-bis(2-amidinopropane) dihydrochloride.

[0152] The polymerization is preferably carried out at a temperature ranging from 70 to 110°C and at atmospheric pressure.

[0153] The polymer particles i) are surface stabilized, when they are formed during polymerization, thanks to the stabilizing agent ii).

[0154] Stabilization can be carried out by any known means, and in particular by direct addition of the stabilizing agent ii), during polymerization.

[0155] The stabilizing agent ii) is preferably also present in the mixture before polymerization of the monomers of the polymer of the particles i). However, it is also possible to add it continuously, in particular when the monomers of the particles i) are also added continuously.

[0156] It is possible to use from 2 to 40% by weight, particularly from 3 to 30% by weight, more particularly from 4 to 25% by weight of the stabilizing agent(s) ii) relative to the total weight of monomers used (stabilizing agents ii) + polymer particles i), and preferably from 4.5 to 20% by weight.

[0157] The dispersion of polymer particles i) advantageously comprises from 30 to 65% by weight of dry matter, relative to the total weight of said dispersion, and preferably from 40 to 60% by weight relative to the total weight of said dispersion.

[0158] The composition according to the invention preferably comprises a content of dry matter (or active matter) of particle polymers i) + dispersing polymers ii) ranging from 10 to 80% by weight, relative to the total weight of the composition, and preferably ranging from 20 to 60% by weight, in particular 30 to 50% by weight, relative to the total weight of the composition.

[0159] According to a preferred embodiment of the invention, the dispersion of the invention does not comprise more than 3% by weight of surfactants relative to the total weight of the dispersion, preferably not more than 2% by weight of surfactants relative to the total weight of the dispersion, more particularly not more than 1% by weight of surfactants relative to the total weight of the dispersion, even more preferably the composition does not comprise more than 0.5% by weight of surfactants relative to the total weight of the dispersion, even better the mixture does not comprise any surfactant.

[0160] In a particular method of preparation, the statistical stabilizing polymer ii) is prepared in a first step. This stabilizing polymer is soluble in an apolar organic solvent of the alkane type such as isododecane.

[0161] Then, in a second step, the particles of the polymer i) are synthesized in the presence of the stabilizing polymer ii).

[0162] Preferably, a solution of stabilizing polymer ii) is prepared in the hydrocarbon oil(s) iii) for the final dispersion, and the polymerization of the monomers which form the core of the particle is carried out in the presence of this stabilizer ii).

[0163] The stabilizing polymer ii) can be prepared by radical polymerization optionally in the presence of polymerization initiator iv) as defined previously.

[0164] In a second step, the monomers which form the core of the particle i) can be polymerized in the presence of said stabilizing polymer ii). This second step can be a conventional radical polymerization.

[0165] Then the water or an aqueous composition is added, preferably with stirring.

[0166] The dispersions are produced in the presence of one or more hydrocarbon oil(s) iii) preferably in an apolar organic solvent, in particular of the alkane type such as in isododecane, according to an industrially realistic process.

[0167] The dispersions according to the invention are therefore ultimately formed from polymeric particles, of fairly large diameter (preferably greater than 100 nm), and will lead to film-forming deposits, shiny and resistant to fatty substances at the observation temperature (25°C).

[0168] In addition, said dispersion being in an oily medium with the presence of water, it becomes easy to formulate it in cosmetic compositions based on an oily medium commonly used in cosmetics, in particular anhydrous media or in the fatty phases of emulsions, but also in aqueous media to allow the solubilization of water-soluble active ingredients.

[0169] Advantageously, the oily dispersion may comprise a plasticizing agent chosen from tri-n-butyl citrate, tripropylene glycol monomethyl ether (INCI name: PPG-3 Methyl Ether), trimethyl pentaphenyl trisiloxane (sold under the name DOW CORNING PH-1555 HRI COSMETIC FLUID by the company Dow Corning). These plasticizers make it possible to improve the mechanical strength of the polymer film.

[0170] The plasticizing agent is preferably present in the oily dispersion in a content ranging from 5 to 50% by weight, relative to the total weight of the polymer of the particles.

[0171] Preferably, a dispersion in iii) in particular isododecane of particles i) of surface-stabilized polymer chosen from: - a dispersion in isododecane of methyl acrylate / ethyl acrylate / acrylic acid copolymer particles (24.5 / 62.8 / 12.7) stabilized by an isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) random copolymer stabilizer; the oily dispersion containing in total (stabilizer + particles) 10% acrylic acid, 20% methyl acrylate, 50% ethyl acrylate and 20% isobornyl acrylate; - a dispersion in isododecane of methyl acrylate / ethyl acrylate / acrylic acid copolymer particles (11.7 / 75.6 / 12.7) stabilized by a statistical copolymer stabilizer isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4); the oily dispersion containing in total (stabilizer + particles) 10% acrylic acid, 10% methyl acrylate, 60% ethyl acrylate and 20% isobornyl acrylate; - a dispersion in isododecane of methyl acrylate / ethyl acrylate / maleic anhydride copolymer particles (50 / 37.2 / 12.8) stabilized by an isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) random copolymer stabilizer; the oily dispersion containing in total (stabilizer ii) + particles i)) 10% maleic anhydride, 30% methyl acrylate, 40% ethyl acrylate and 20% isobornyl acrylate.

[0172] More preferably, a dispersion in isododecane of methyl acrylate / ethyl acrylate / acrylic acid (11.7 / 75.6 / 12.7) copolymer particles stabilized by an isobutyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) random copolymer stabilizer will be used; the oily dispersion containing in total (stabilizer ii) + particles i)) 10% acrylic acid, 10% methyl acrylate, 60% ethyl acrylate and 20% isobornyl acrylate.

[0173] The amount of oily dispersion of particles i) in the composition of the invention preferably varies from 20% to 40% by weight, more preferably from 25 to 35% by weight relative to the total weight of the composition. Water :

[0174] The composition according to the invention preferably comprises a quantity of water greater than or equal to 2% by weight and less than 50% by weight relative to the total weight of the composition, more particularly the quantity of water in the composition is between 5% and 49% by weight relative to the total weight of the composition, more particularly between 10% and 47% by weight, between 15% and 48% by weight, preferably between 18% and 45%, even more preferably between 20% and 40% by weight, relative to the total weight of the composition. Aqueous wax microdispersion:

[0175] The composition according to the invention further comprises an aqueous microdispersion of wax particles.

[0176] Aqueous microdispersion of wax means an aqueous dispersion of wax particles, in which the size of said wax particles is less than or equal to 1 μm.

[0177] In the present application, a wax is a lipophilic compound, solid at room temperature (25°C), with a reversible solid / liquid state change, having a melting point greater than or equal to 30°C and up to 120°C. By bringing the wax to the liquid state (melting), it is possible to make it miscible with oils and to form a microscopically homogeneous mixture, but by bringing the temperature of the mixture back to room temperature, a recrystallization of the wax is obtained in the oils of the mixture.

[0178] The melting point of the wax can be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name DSC by the company METLER. A 15 mg sample of product placed in a crucible is subjected to a first temperature rise from 0°C to 120°C, at a heating rate of 10°C / minute, then cooled from 120°C to 0°C at a cooling rate of 10°C / minute and finally subjected to a second temperature rise from 0°C to 120°C at a heating rate of 5°C / minute. During the second temperature rise, the variation in the difference in power absorbed by the empty crucible and by the crucible containing the product sample as a function of the temperature is measured. The melting point of the compound is the temperature value corresponding to the top of the peak of the curve representing the variation of the difference in absorbed power as a function of temperature.

[0179] Aqueous wax microdispersions are stable dispersions of colloidal wax particles, and are notably described in "Microemulsions Theory and Practice", LM Prince Ed., Academie Press (1977) pages 21-32.

[0180] Aqueous wax microdispersions are also described in application EP0394078 as well as their preparation processes.

[0181] In particular, these wax microdispersions can be obtained by melting the wax in the presence of a surfactant, and optionally a portion of the water, then gradually adding hot water with stirring. The intermediate formation of a water-in-oil type emulsion is observed, followed by phase inversion with the final production of an oil-in-water type microemulsion. Upon cooling, a stable microdispersion of solid colloidal wax particles is obtained. The wax microdispersions can also be obtained by stirring the mixture of wax, surfactant and water using stirring means such as ultrasound, high-pressure homogenizer, turbines.

[0182] The particles of the wax microdispersion have average dimensions less than or equal to 1 pm, in particular ranging from 0.02 pm to 1 pm), preferably less than or equal to 0.5 pm, in particular ranging from 0.051 pm to 0.5 pm.

[0183] These particles consist essentially of a wax or a mixture of waxes.

[0184] They may however comprise in a minor proportion oily and / or pasty fatty additives, a surfactant and / or a usual liposoluble additive / active agent.

[0185] The waxes that can be used in the compositions according to the invention are chosen from waxes, solid and rigid, at room temperature of animal, vegetable, mineral or synthetic origin and their mixtures. Preferably, the waxes used in the composition have a melting point above 45°C, and in particular above 60°C. The wax can also have a hardness ranging from 0.05 MPa to 15 MPa, and preferably ranging from 6 MPa to 15 MPa. The hardness is determined by measuring the compressive force measured at 20°C using the texturometer sold under the name TA-TX2i by the company RHEO, equipped with a stainless steel cylinder with a diameter of 2 mm moving at a measuring speed of 0.1 mm / s, and penetrating into the wax to a penetration depth of 0.3 mm. To perform the hardness measurement, the wax is melted at a temperature equal to the melting point of the wax + 20°C.The molten wax is poured into a container 30 mm in diameter and 20 mm deep. The wax is recrystallized at room temperature (25 °C) for 24 hours, then the wax is kept for at least 1 hour at 20 °C before performing the hardness measurement. The hardness value is the measured compressive force divided by the surface area of ​​the texturometer cylinder in contact with the wax.

[0186] Mention may in particular be made of hydrocarbon waxes such as beeswax, lanolin wax, and Chinese insect waxes; rice wax, carnauba wax, of Candellila, Ouricurry wax, Alfa wax, cork fiber wax, sugarcane wax, Japan wax and sumac wax; montan wax, microcrystalline waxes, paraffins and ozokerite; polyethylene waxes, waxes obtained by the Fisher-Tropsch synthesis and waxy copolymers as well as their esters.

[0187] Mention may also be made of waxes obtained by catalytic hydrogenation of animal or vegetable oils having linear or branched fatty chains, in C8-C32.

[0188] Among these, mention may be made in particular of hydrogenated jojoba oil, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated coconut oil and hydrogenated lanolin oil.

[0189] We can also cite silicone waxes and fluorinated waxes.

[0190] It is also possible to use commercial mixtures of self-emulsifying waxes containing a wax and surfactants. For example, the wax marketed under the name 'OFR® Auto Lustrante Wax' by Tiscco, which contains Carnauba and paraffin waxes in association with non-ionic surfactants, or the self-emulsifying wax marketed under the name 'Cerax AO 28 / B' by La Ceresine, which contains Alfa wax in association with a non-ionic surfactant, can be used. These commercial mixtures make it possible to prepare microdispersions of waxes by simply adding water.

[0191] We can also mention the 'Aquacer®' products from Byk Cera, and in particular: the mixture of synthetic and natural waxes with anionic emulsifier (Aquacer 520®), the polyethylene wax with non-ionic emulsifier (Aquacer 514® or

[0192] Aquacer 513®), polymeric wax with anionic emulsifier (Aquacer 511®).

[0193] Mention may also be made of the mixture of polyethylene and paraffin waxes with non-ionic emulsifier 'Jonwax 120®' from Johnson Polymer.

[0194] The composition may also comprise a sufficient quantity of surfactant to enable a wax microdispersion to be obtained, as well as a stable final composition. In particular, it may comprise 0.01% to 30% by weight relative to the total weight of the wax microdispersion of usual surfactant, which may be chosen from the following compounds:

[0195] - anionic surfactants, in particular optionally fatty acid salts unsaturated, having for example 12 to 18 carbon atoms; alkali salts or salts

[0196] of organic bases of alkyl-sulfuric and alkylsulfonic acids having 12 to 18 carbon atoms or of alkyl-arylsulfonic acids whose alkyl chain contains 6-18 carbon atoms; ether-sulfates; - non-ionic surfactants, in particular polyalkoxylated and / or polyglycerolated surfactants, and in particular fatty acids or fatty acid amides; fatty alcohols or alkylphenols; esters of fatty acids and polyols; alkane diols and alkyl ethers of alkanediols. Mention may also be made of triglycerol alkylcarbamates, oxyethylenated or propoxylated derivatives of lanolin alcohols, lanolin fatty acids, or mixtures thereof. - cationic surfactants, in particular quaternary ammonium derivatives.

[0197] The wax or mixture of waxes may be combined with one or more fatty additives (oily and / or pasty). Examples include vegetable oils such as sunflower oil, jojoba oil; mineral oils such as paraffin oil; silicone oils; petroleum jelly, lanolin; fluorinated oils; hydrocarbon oils with a perfluorinated group; fatty alcohol esters.

[0198] The wax or mixture of waxes can be associated with a C1-C4 monoalcohol such as ethanol or isopropanol.

[0199] According to a particular preferred form of the invention, an aqueous microdispersion of camauba wax (COPERNICIA CERIFERA WAX) will be used and more particularly the aqueous microdispersion comprising 27% camauba wax, 10% ethanol, 7% PEG-30 Glyceryl Stearate and 56% water such as the product manufactured by the company NOVEAL under the trade name MEXORYL SAP®.

[0200] The amount of aqueous microdispersion of wax, in the composition of the invention, preferably varies from 5% to 20% by weight, more preferably from 5 to 15% by weight relative to the total weight of the composition.

[0201] In a preferred embodiment, the weight ratio of the oily dispersion of surface-stable polymer particles to the aqueous microdispersion of wax varies from 2 to 6, more preferably from 2 to 5. Coloring matter

[0202] According to a particular form of the invention, the composition according to the invention additionally comprises at least one coloring material, in particular chosen from pulverulent coloring materials, water-soluble dyes, and mixtures thereof.

[0203] The powdery coloring materials can be chosen from pigments and pearlescent agents.

[0204] The pigments may be white or colored, mineral and / or organic, coated or not. Among the mineral pigments, mention may be made of titanium dioxide, optionally surface-treated, zirconium, zinc or cerium oxides, as well as iron or chromium oxides, manganese violet, ultramarine blue, chromium hydrate and ferric blue. Among the organic pigments, mention may be made of carbon black, D & C type pigments, and lakes based on cochineal carmine, barium, strontium, calcium, aluminum.

[0205] The nacres can be chosen from white nacreous pigments such as mica coated with titanium or bismuth oxychloride, colored nacreous pigments such as titanium mica with iron oxides, titanium mica with in particular ferric blue or chromium oxide, titanium mica with an organic pigment of the aforementioned type as well as nacreous pigments based on bismuth oxychloride.

[0206] Preferably, the composition according to the invention comprises a pulverulent coloring material, preferably of the pigment type, in particular metal oxides, in particular titanium dioxides, iron oxides and their mixtures; and more particularly iron oxides.

[0207] As water-soluble dyes suitable for the invention, mention may in particular be made of synthetic or natural water-soluble dyes such as, for example, FDC Red 4, DC Red 6, DC Red 22, DC Red 28, DC Red 30, DC Red 33, DC Orange 4, DC Yellow 5, DC Yellow 6, DC Yellow 8, FDC Green 3, DC Green 5, FDC Blue 1, betanin (beetroot), carmine, copper chlorophyllin, methylene blue, anthocyanins (enocyanin, black carrot, hibiscus, elderberry), caramel, riboflavin.

[0208] Water-soluble colorants are, for example, beetroot juice and caramel.

[0209] Preferably, the coloring matter(s) is / are present in composition (B) in a total content ranging from 2.0 to 25.0% by weight, preferably from 3.0% to 20.0% by weight, more particularly from 4.0 to 15.0% by weight relative to the total weight of the composition. Non-volatile oils

[0210] According to a particular form of the invention, the composition according to the invention comprises at least one non-volatile oil such as those described previously. Additives

[0211] As cosmetic additives which can be used in the compositions according to the invention, mention may in particular be made of antioxidants; preservatives; perfumes; organic or mineral fillers; thickeners and gelling agents; sequestrants; chelating agents; sunscreens; vitamins such as vitamin C or ascorbic acid and its derivatives such as 2-o-alpha-d-glucopyranosyl-l-ascorbic acid (INCI name Ascorbyl Glucoside), vitamin B3 or niacinamide; vitamin B8 also called H: D-Biotin, vitamin E and its derivatives such as tocopherol acetate; provitamins such as panthenol also called provitamin B5 or Dexpanthenol; humectants such as polyols like 1,3 propanediol, glycerin, pentylene glycol, propylene glycol, ethylene glycol, 1,3-butylene glycol, dipropylene glycol and mixtures thereof, C1-C5 monoalcohols like ethanol, isopropanol, and mixtures thereof.

[0212] These additives may be present in the composition in a content ranging from 0.01 to 15.0%, of the total weight of the composition.

[0213] Of course, those skilled in the art will take care to choose any additional additives and / or their quantity in such a way that the advantageous properties of the composition according to the invention are not, or not substantially, altered by the envisaged addition.

[0214] According to a particular form of the invention, the composition is in the form of a product for makeup and / or skin care, particularly for the face, the eye contour, the cheeks, such as a foundation.

[0215] According to a particular form of the invention, the composition is in the form of a product for makeup and / or care such as a lipstick.

[0216] According to a particular form of the invention, the composition is in the form of a makeup and / or eyelash care product such as a mascara, an eyeliner. Packaging and applicators

[0217] The compositions according to the invention may be packaged in a container delimiting at least one compartment which comprises said composition, said container being closed by a closing element.

[0218] The container may be in any suitable form. It may in particular be in the form of a bottle, a tube, a pot, a case.

[0219] The closure element may be in the form of a removable stopper, a lid, a cover, in particular of the type comprising a body fixed to the container and a cap hinged to the body. It may also be in the form of an element ensuring the selective closure of the container, in particular a pump, a valve, or a flap.

[0220] The container may be associated with an applicator, in particular in the form of a brush comprising an arrangement of bristles held by a twisted wire. Such a twisted brush is described in particular in US patent 4,887,622. It may also be in the form of a comb comprising a plurality of application elements, obtained in particular by molding. Such combs are described for example in patent FR 2 796 529. The applicator may be in the form of a brush, as described for example in patent FR 2 722 380. The applicator may be in the form of a block of foam or elastomer. The applicator may be free (sponge) or integral with a rod carried by the closure element, as described for example in patent US 5,492,426. The applicator may be integral with the container, as described for example in patent FR 2 761 959.

[0221] The product may be contained directly in the container, or indirectly.

[0222] The closure element may be coupled to the container by screwing. Alternatively, the coupling between the closure element and the container is done other than by screwing, in particular via a bayonet mechanism, by snap-fastening, or by tightening. By "snap-fastening" is meant in particular any system involving the crossing of a bead or cord of material by elastic deformation of a portion, in particular of the closure element, then by return to the elastically unstressed position of said portion after crossing the bead or cord.

[0223] The container may be at least partly made of thermoplastic material. Examples of thermoplastic materials include polypropylene or polyethylene.

[0224] The container may have rigid walls or deformable walls, in particular in the form of a tube or a tube bottle.

[0225] The container may comprise means for causing or facilitating the dispensing of the composition. For example, the container may have deformable walls so as to cause the composition to exit in response to an overpressure inside the container, which overpressure is caused by elastic (or non-elastic) crushing of the walls of the container.

[0226] The container may be equipped with a wiper arranged in the vicinity of the opening of the container. Such a wiper makes it possible to wipe the applicator and possibly the rod to which it may be attached. Such a wiper is described for example in patent FR 2 792 618.

[0227] Throughout the description, including the claims, the expression "comprising a" must be understood as being synonymous with "comprising at least one", unless otherwise specified.

[0228] The expressions “between ... and ...” and “ranging from ... to ...” must be understood inclusively, unless otherwise specified.

[0229] The invention is illustrated in more detail by the examples and figures presented below. Unless otherwise indicated, the quantities indicated are expressed as a mass percentage.

[0230] Example 1 of preparation of oily polymer dispersion

[0231] A dispersion of i) polymer particles in isododecane was prepared using: Step 1: 315.2 g of isobutyl acrylate, 12.5 g of methyl acrylate, 12.5 g of ethyl acrylate, 3.4 g of Trigonox 21, 540 g of isododecane, 360 g of ethyl acetate. After 2 hours of reaction, 540 g of isododecane and 360 g of ethyl acetate were added to the reactor base and the mixture was heated to 90 °C. Step 2: 303 g of methyl acrylate, 776 g of ethyl acrylate, 157 g of acrylic acid, 11 g of Trigonox 21S, 741.6 g of isododecane and 494.4 g of ethyl acetate. After reaction, add 3 liters of an isododecane / ethyl acetate mixture (60 / 40 weight / weight) and total evaporation of ethyl acetate and partial evaporation of isododecane to obtain a dry extract of 44% by weight.

[0232] A dispersion in isododecane of particles i) of copolymer i) methyl acrylate / ethyl acrylate / acrylic acid (24.5 / 62.8 / 12.7) a) stabilized by a stabilizer ii) random copolymer isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) was obtained. The oily dispersion contains in total (particles i + stabilizer ii) 10% acrylic acid, 20% methyl acrylate, 50% ethyl acrylate and 20% isobornyl acrylate.

[0233] Example 2 of preparation of oily polymer dispersion

[0234] A dispersion of particles i) of polymer in isododecane was prepared, according to the method of preparation of Example 1, using: Step 1: 315.2 g of isobornyl acrylate, 12.5 g of methyl acrylate, 12.5 g of ethyl acrylate, 3.4 g of Trigonox 21, 540 g of isododecane, 360 g of ethyl acetate; then addition after reaction of 540 g of isododecane and 360 g of ethyl acetate. Step 2: 145 g of methyl acrylate, 934 g of ethyl acrylate, 157 g of acrylic acid, 12.36 g of Trigonox 21S, 741.6 g of isododecane and 494.4 g of ethyl acetate. After reaction, add 3 liters of an isododecane / ethyl acetate mixture (60 / 40 weight / weight) and total evaporation of the ethyl acetate and partial evaporation of the isododecane to obtain a dry extract of 44% by weight.

[0235] A dispersion in isododecane of particles i) of methyl acrylate / ethyl acrylate / acrylic acid copolymer (11.7 / 75.6 / 12.7) stabilized by a stabilizer ii) isobornyl acrylate / methyl acrylate / ethyl acrylate random copolymer (92 / 4 / 4) was obtained. The oily dispersion contains in total (particles i + stabilizer ii) 10% acrylic acid, 10% methyl acrylate, 60% ethyl acrylate and 20% isobornyl acrylate.

[0236] Example 3 of preparation of oily polymer dispersion

[0237] A dispersion of particles i) polymer in isododecane was prepared, according to the preparation method of Example 1, using: Step 1: 48 g of isobornyl acrylate, 2 g of methyl acrylate, 2 g of ethyl acrylate, 0.52 g of Trigonox 21, 57.6 g of isododecane, 38.4 g of ethyl acetate; then addition after reaction of 540 g of isododecane and 360 g of ethyl acetate. Step 2: 98 g of methyl acrylate, 73 g of ethyl acrylate, 25 g of maleic anhydride, 1.96 g of Trigonox 21S, 50.4 g of isododecane and 33.60 g of ethyl acetate. After reaction, add 1 liter of an isododecane / ethyl acetate mixture (60 / 40 weight / weight) and total evaporation of the ethyl acetate and partial evaporation of the isododecane to obtain a dry extract of 46.2% by weight.

[0238] A dispersion in isododecane of particles i) of methyl acrylate / ethyl acrylate / maleic anhydride copolymer (50 / 37.2 / 12.8) stabilized by a stabilizer ii) isobornyl acrylate / methyl acrylate / ethyl acrylate random copolymer (92 / 4 / 4) was obtained. The oily dispersion contains in total (particles i + stabilizer ii) 10% maleic anhydride, 30% methyl acrylate, 40% ethyl acrylate and 20% isobornyl acrylate. Composition Examples 1 and 2

[0239] [Tables 1] Ingredients (INCI name) Example 1 (invention) Example 2 (non-invention) 10 active material - Carnauba wax (CERAUBA Tl® from BAERLAUC HER) - 10 Oily dispersion of polymer particles from example 2 qs 100 qs 100 Preparation protocol

[0240] Composition 1 according to the invention was obtained by simple homogenization at room temperature (25°C).

[0241] The ingredients of composition 2 outside the invention were weighed and heated to 95°C to melt the wax. Once the wax was completely melted, the mixture was homogenized for 5 min at 3000 rpm using a Moritz. The mixture was then cooled with stirring to room temperature (25°C).

[0242] Composition 1, according to the invention, is stable and homogeneous after 48 hours at room temperature (25°C). It forms a covering film which makes it possible to cover skin imperfections.

[0243] It was found that composition 2 outside the invention is unstable and heterogeneous due to the presence of large clumps of wax after 48 hours at room temperature (25°C).

Claims

Claims

1. Composition comprising, preferably in a cosmetically acceptable medium, at least: - an oily dispersion which comprises: i) one or more particles comprising: a) one or more ethylenic copolymer(s) of aj (CrC4) (alkyl)acrylate of (Ci-C4)alkyl, and of a2) ethylenic monomers comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups such as benzyl; in particular a2) is a (Ci-C4)(alkyl)acrylic acid, more particularly the copolymers of (CrC4)alkyl (meth)acrylate and of (meth)acrylic acid; and ii) one or more polymeric stabilizing agent(s) chosen from: b) polymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl monomers such as isobornyl (meth)acrylates;and c) copolymers of cj (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl such as isobornyl (meth)acrylates and c2) (Cr C4)(alkyl)acrylate of (CrC4)alkyl such as (meth)acrylate of (Cr C4)alkyl; and iii) one or more hydrocarbon oil(s); - an aqueous microdispersion of wax particles of size less than or equal to 1 unit;

2. Composition according to the preceding claim in which the oily dispersion is such that the particle(s) i) is (are) made up of an ethylenic polymer core derived from copolymers a) as defined in the preceding claim, and ii) of one or more polymeric surface stabilizing agent(s) derived from polymer b) or from copolymers c) as defined in the preceding claim.

3. Composition according to any one of the preceding claims in which the oily dispersion is such that the monomer(s) aj (CrC4)(alkyl)acrylate of (CrC4)alkyl are chosen from those of formula (I): HzC=C(R>-C(O}-O-R' (0 in which: - R representing a hydrogen atom or (Ci-C4)alkyl group such as methyl, and - R' representing a (Ci-C4)alkyl group such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, preferably methyl, ethyl or i-butyl; particularly methyl, ethyl or isobutyl, preferably (I) is chosen from methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate; and more preferably chosen from methyl (meth)acrylate, ethyl (meth)acrylate and isobutyl (meth)acrylate; more preferably (I) represents preferably represents methyl acrylate, ethyl acrylate, isobutyl acrylate and isobutyl methacrylate.

4. Composition according to any one of the preceding claims in which the oily dispersion is such that the ethylenic monomer(s) a2) comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups such as benzyl is (are) chosen from (1), (2), (3), and (4): (1) R1(R2)C=C(R3)-Acid with Rb R2 and R3 representing a hydrogen atom or a CO2H, H2PO4, or SO3H group, and Acid representing a carboxy, phosphoric acid, sulfonic acid, preferably carboxy group, preferably (1) represents (5) H2C=C(R)-C(O)-OH with R representing a hydrogen atom, or a (C1-C4) alkyl group such as methyl; (2) H2C=C(R)-C(O)-N(R')-Alk-Acid with R and R', identical or different, representing a hydrogen atom, or a (Cr C4)alkyl group; Alk represents a (Ci-C6)alkylene group optionally substituted by at least one group chosen from Acid as defined above and hydroxy;and Acid is as defined above, preferably carboxy or sulfonic acid; (3) Ar-(Ra)C=C(Rb)-Rc with Ra, Rb and Rc, identical or different, representing a hydrogen atom or a (CrC4)alkyl group, and Ar represents an aryl group, preferably benzyl, optionally substituted by at least one acid group CO2H, H2PO4, or SO3H, preferably substituted by a CO2H, or SO3H group, (4) Maleic anhydride of formula (4a) and (4b):; Q (4a) in which Ra, Rb and Rc, identical or different, represent a hydrogen atom or a (Ci-C4)alkyl group, preferably Ra, Rb, and Rc represent a hydrogen atom; preferably the ethylenically unsaturated anhydride monomer of the invention is of formula (4b) and more preferably is maleic anhydride; more particularly a2) is chosen from (1) and (4) preferably (5).

5. Composition according to any one of the preceding claims in which the oily dispersion is such that the ethylenic monomer(s) a2) comprising one or more carboxy, anhydride, phosphoric acid, sulfonic acid and / or aryl groups is (are) chosen from crotonic acid, maleic anhydride, itaconic acid, fumaric acid, maleic acid, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid, acrylic acid, methacrylic acid, acrylamidopropanesulfonic acid, acrylamidoglycolic acid, acrylic acid and their salts, even more preferably a2) represents acrylic acid and its salts or maleic anhydride.

6. Composition according to any one of the preceding claims in which the oily dispersion is such that the stabilizing agent(s) ii) is (are) composed of ethylenic polymers chosen from: b) polymers of monomers of formula H2C=C(R)-C(O)-O-R' (HD with R representing a hydrogen atom or (Ci-C4) alkyl group such as methyl, and R” representing a (C5-Cio)cycloalkyl group such as norbornyl, or isobornyl, preferably isobornyl; and c) copolymers of cj H2C=C(R)-C(O)-OR” (III) in which R and R” have the same meanings indicated previously in b) and of c2) H2C=C(R)-C(O)-O-R' (I) in which R has the same meaning as that in formula (III) and R' represents a (C i -C 4 )alkyl group; more particularly, the stabilizing agent ii) is chosen from: homopolymers of isobornyl acrylate, random copolymers of isobornyl acrylate / methyl acrylate, random copolymers of isobornyl acrylate / ethyl acrylate, and random copolymers of isobornyl acrylate / methyl acrylate / ethyl acrylate.

7. Composition according to claim 1 to 5, in which the oily dispersion is such that the stabilizing agent(s) ii) is (are) chosen from polymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl monomers; and c) random copolymers of (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl and (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl with a weight ratio C1 / C2 greater than 4, advantageously, said weight ratio ranges from 4.5 to 19, preferably, said weight ratio C1 / C2 ranges from 5 to 15, more preferably said weight ratio ranges from 5.5 to 12.

8. Composition according to any one of the preceding claims, in which the oily dispersion is such that the polymer of the particles i) comprises from 80 to 93% by weight of the ingredient aj, in particular C1-C4 alkyl (meth)acrylate, and from 7 to 20% by weight of the ingredient a2) relative to the total weight of the polymer i); more preferably, the polymer of the particles i) preferably comprises from 85 to 93% by weight, more particularly 87% to 92% by weight, even more preferably from 85% to 90% by weight, of the ingredient ai), in particular C1-C4 alkyl (meth)acrylate, and from 10 to 20% by weight of the ingredient a2) relative to the total weight of the polymer i).

9. Composition according to claim 1 to 5, in which the oily dispersion is such that the stabilizing agent(s) ii) are chosen from c) copolymers of cj (Ci-C6)(alkyl)acrylate of (C3-Ci2)cycloalkyl and c2) (Ci-C4)(alkyl)acrylate of (Ci-C4)alkyl with from 85 to 94% by weight of the ingredient cj, in particular of (meth)acrylate of isocarboxylic acid and from 5 to 20% by weight of ingredient c2) relative to the total weight of the stabilizing agent; more preferably, the stabilizing agent(s) ii) comprise from 85 to 98% by weight, more particularly 87% to 94% by weight, of ingredient Ci), in particular isocarboxylic acid (meth)acrylate, and from 10 to 20% by weight of ingredient c2) relative to the total weight of the stabilizing agent.

10. Composition according to any one of the preceding claims, wherein the polymer of the particles i) is present in the dispersion in a content ranging from 21% to 58.5% by weight, preferably ranging from 30 to 50% by weight relative to the total weight of the dispersion.

11. Composition according to any one of the preceding claims, in which the hydrocarbon oil(s) is / are formed solely of carbon and hydrogen atoms; preferably chosen from: - linear or branched C8-C30 alkanes, in particular C10-C2O, more particularly C10-C16, volatile or non-volatile; preferably volatile - cyclic, non-aromatic, C5-C12 alkanes, volatile or non-volatile; preferably volatile, and - mixtures thereof; more preferably chosen from hydrocarbon oils having from 8 to 16 carbon atoms, in particular having from 10 to 14 carbon atoms, preferably volatile, more particularly: - isoalkanes of petroleum origin or isoparaffins; - linear alkanes; even more preferably, the liquid hydrocarbon oil iii) is isododecane.

12. Composition according to any one of the preceding claims, in which the hydrocarbon oil(s) iii) is / are present in the oily dispersion in an amount of between 15% by weight and 80% by weight, more preferably between 20% and 60% by weight relative to the total weight of said oily dispersion, even more particularly the weight ratio of the sum of the ingredients [i) + ii)] / iii) is less than or equal to 1, more particularly [i) + ii]] / iii) the mass ratio is between 0.5 and 1.

13. A composition according to any preceding claim, wherein the polymer particles of the dispersion have an average size, particularly in number, ranging from 50 to 500 nm, particularly ranging from 75 to 400 nm, and better still ranging from 100 to 250 nm.

14. Composition according to any one of the preceding claims, wherein the dispersion of particles i) is chosen from: - a dispersion in isododecane of methyl acrylate / ethyl acrylate / acrylic acid copolymer particles (24.5 / 62.8 / 12.7) stabilized by an isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) random copolymer stabilizer; the oily dispersion containing in total (stabilizer ii) + particles i)) 10% acrylic acid, 20% methyl acrylate, 50% ethyl acrylate and 20% isobornyl acrylate; - a dispersion in isododecane of methyl acrylate / ethyl acrylate / acrylic acid (11.7 / 75.6 / 12.7) copolymer particles stabilized by an isobutyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4) random copolymer stabilizer;the oily dispersion containing in total (stabilizer ii + particles i)) 10% acrylic acid, 10% methyl acrylate, 60% ethyl acrylate and 20% isobornyl acrylate; - a dispersion in isododecane of methyl acrylate / ethyl acrylate / maleic anhydride copolymer particles (50 / 37.2 / 12.8) stabilized by a random copolymer stabilizer isobornyl acrylate / methyl acrylate / ethyl acrylate (92 / 4 / 4); the oily dispersion containing in total (stabilizer ii) + particles i) 10% maleic anhydride, 30% methyl acrylate, 40% ethyl acrylate and 20% isobornyl acrylate.;

15. Composition according to any one of the preceding claims, wherein the amount of oily dispersion of particles i) varies from 20% to 40% by weight, more preferably from 25 to 35% by weight relative to the total weight of the composition.

16. Composition according to any one of the preceding claims, wherein the amount of water is greater than or equal to 2% by weight and less than 50% by weight relative to the total weight of the composition, more particularly the amount of water in the composition is between 5% and 49% by weight relative to the total weight of the composition, more particularly between 10% and 47% by weight, between 15% and 48% by weight, preferably between 18% and 45%, even more preferably between 20% and 40% by weight, relative to the total weight of the composition.

17. Composition according to any one of the preceding claims, wherein the wax(es) has a melting point above 45°C, and in particular above 60°C.

18. Composition according to any one of the preceding claims, wherein the wax(es) have a hardness ranging from 0.05 to 15 MPa, and preferably ranging from 6 to 15 MPa.

19. A composition according to any preceding claim, wherein the aqueous microdispersion of wax is an aqueous microdispersion of carnauba wax (COPERNICIA CERIFERA WAX), and more particularly an aqueous microdispersion comprising 27% carnauba wax, 10% ethanol, 7% PEG-30 Glyceryl Stearate and 56% water.

20. Composition according to any one of the preceding claims, wherein the amount of aqueous microdispersion of wax varies from 5% to 20% by weight, more preferably from 5 to 15% by weight relative to the total weight of the composition.

21. Composition according to any one of the preceding claims, wherein the weight ratio of the oily dispersion of particles i) of polymer to the aqueous microdispersion of wax varies from 2 to 6, more preferably from 2 to 5.

22. Composition according to any one of the preceding claims, comprising at least one coloring material, in particular chosen from powdery coloring materials, water-soluble dyes, and mixtures thereof.

23. Composition according to claim 22, wherein the coloring matter(s) are present in a total content ranging from 2.0 to 25.0% by weight, preferably from 3.0% to 20.0% by weight, more particularly from 4.0 to 15.0% by weight relative to the total weight of the composition.

24. A composition according to any preceding claim, comprising one or more non-volatile oils, preferably ion in a total concentration of less than 10.0% by weight relative to the total weight of the composition.

25. Method for making up and / or caring for keratin materials consisting of applying to the surface of said materials at least one composition as defined in any one of the preceding claims.