FR2871468A1 - Dispersion (solid particles), useful as e.g. make-up product, comprises ethylinic polymer comprising a structure (insoluble and partly soluble in the medium) containing lateral chains in covalent manner - Google Patents

Abstract

Dispersion (solid particles) (Z), in organic or non aqueous medium, comprising ethylinic polymer having a structure (insoluble and partly soluble in the medium) containing lateral chains in covalent manner, is new. The ethylinic polymer is obtained by radical polymerization of isoquinoline-1,3-dione monomer (I) (having optical effect to form insoluble structure) and a macromonomer (having polymerizable terminal group) to form lateral chains. Dispersion (solid particles) (Z), in an organic or non aqueous medium, comprising an ethylinic polymer comprising a structure (insoluble and partly soluble in the medium) containing lateral chains in a covalent manner, where the ethylinic polymer is obtained by radical polymerization of a benzo isoquinoline-1,3-dione monomer of formula (I) with an optical effect to form the insoluble structure and a macromonomer (having an polymerizable final group) to form the lateral chains. R2, R3 = H, halo or 1-30C radical (optionally substituted with O, OH, NH2 or halo and/or optionally interrupted by heteroatoms (O, N, P, Si or S)); X, Xa = -O-, -S-, -SO-, -SO2-, -NH- or -NR4-; R4 = 1-30C radical (optionally substituted with O, OH, NH2 or halo and/or optionally interrupted by heteroatoms (O, N, P, Si or S)); n, m, p = 0-1; G = 1-30C divalent radical (optionally substituted by O, OH, NH2 or halo and/or optionally interrupted by heteroatoms (O, N, P, Si or S)); P = polymerizable group (IIa) of formulae (H2C=C(Rb)-C(=O)- (II), (H2C=C(Rb)-(CH2)n- or vinyl-benzene (substituted with (CH2)m-; and Rb = H or 1-6C hydrocarbon. When R2 is H and P is polymerizable group (IIa), then XaR3 is different of OCH3; when R2 is H, P is polymerizable group (II), X is O, NH or NR4 and Xa is O, S or NR4, then R3 is 2-5C alkyl, 7-24C alkyl or 5-18C cyclic alkyl (all optionally substituted and/or optionally interrupted). An independent claim is also included for a cosmetic or pharmaceutical composition comprising (Z) in a medium. [Image].

Description

The present invention relates to stable dispersions of particles

  formed by optical-effect ethylenic polymers in a non-aqueous medium, as well as the use of these dispersions in cosmetic compositions and the compositions thus obtained.

  It is known to use in the field of cosmetics dispersions of polymer particles in organic media, as film-forming agents in different cosmetic formulations, such as mascaras, eyeliners, shadows, eyelids or nail polish.

  Thus, in the European patent application EP-A-0749747, there is described a composition comprising a dispersion of non-soluble polymer particles in a non-aqueous medium, said dispersion being stabilized by addition of stabilizing polymers. The stabilizing polymers according to this document bind non-covalently through physical interactions on the non-soluble polymers discussed above.

  However, this type of composition has the following drawbacks: it requires the addition in the non-aqueous medium of a quantity of so-called stabilizing polymers greater than that effectively bound to the non-soluble polymer particles, in order to obtain a dispersion of said particles relatively stable. However, during the addition in these compositions of adjuvants, such as pigments, a portion of the stabilizing polymers has a tendency to desorb insoluble polymer particles to associate with said adjuvants, which contributes to destabilize the dispersion. , especially by formation of agglomerates between the polymer particles.

  JP 11181003 describes polymers capable of forming solid particles without the addition of stabilizing polymers, but these particles are unstable in non-aqueous organic media.

  The Applicant has surprisingly discovered novel polymers capable of forming stable particles in a non-aqueous medium without the addition of stabilizing polymers.

  Thus, it is an object of the present invention to provide a dispersion, in an organic dispersion medium, of self-stabilized individual solid particles of polymer having optical effects, said dispersion being free from agglomerates of particles and insoluble sediments, visually, for example after the dispersion has been left standing overnight (24 hours) at room temperature (20 ° C.).

  Furthermore, there is also a need for organic polymers having optical properties which make it possible to confer adequate optical effects on the compositions comprising them and / or on the makeup obtained with the aid of these compositions, said polymers having a further advantage. good thermal and photochemical stability, while presenting a weak disgorging.

  A first object of the present invention is therefore a dispersion, in a non-aqueous organic medium, of particularly solid particles consisting of at least one ethylenic polymer comprising an insoluble backbone in said medium, and a portion soluble in said medium consisting of side chains. covalently bound to said backbone, said ethylenic polymer being capable of being obtained by radical polymerization of: at least one optically effective monomer of formula (I) as defined hereinafter, to form said insoluble backbone; and at least one macromonomer comprising a polymerizable end group capable of forming the side chains.

  Another subject of the invention is a cosmetic or pharmaceutical composition comprising, in a cosmetically or pharmaceutically acceptable medium, such a dispersion.

  Another subject of the invention is a cosmetic treatment method for the care, the cleaning and / or the makeup of keratin materials such as the skin of the body or face, the scalp, the eyelashes, the eyebrows, the hair, the lips, the nails, comprising the application to said keratin materials, of such a cosmetic composition.

  The dispersions according to the invention are therefore free of stabilizing polymer, such as those described in EP749747, and the polymers according to the invention are therefore not surface stabilized by such additional stabilizing polymers.

  An advantage of the invention is that the polymer dispersions according to the invention can provide lightening, illuminating or color effects, makeup or composition. These optical effects can be advantageously modulated depending on the chemical nature and / or the position of the different substituents present on the optical effect monomer used to form the dispersed polymer. In general, when the group X is oxygen, the monomer, and the resulting polymer, will be rather blue / white; when the X group comprises a nitrogen atom, the monomer, and the resulting polymer will be rather in the field of yellow-orange.

  In addition, although of a similar chemical structure, the polymers according to the invention may have, depending on the nature of the substituents, a wide variety of optical effects, ranging from blue / violet to orange / red, passing by the yellow. This makes it possible to have a range of compounds, belonging to the same chemical family, and therefore formulating in a similar manner, which offer remarkable diversity of colors or optical properties; this facilitates, in particular, the work of the formulators by allowing them to maintain an architecture common to all of their compositions, irrespective of the optically active polymers used.

  Moreover, the polymers used according to the invention have good fluorescence properties, and for some of them, optically brightening properties. It is recalled that optical brighteners are endowed with fluorescence properties; in general, the fluorescent compounds absorb in the ultraviolet and the visible, and re-emit fluorescence energy at a wavelength between 380 nm and 830 nm; when this wavelength is between 380 nm and 480 nm, that is to say in the blue of the visible range, the compounds are then optical brighteners.

  The dispersion according to the invention therefore comprises polymer particles, dispersed in an organic dispersion medium which is non-aqueous and which can be silicone or non-silicone.

  The term "organic medium" means a non-aqueous organic medium consisting mainly of one or more organic or non-organic compounds, preferably organic, liquid as defined below, said medium may contain at most 1% by weight of water . Preferably, the organic medium is liquid. Said organic medium may be silicone or non-silicone.

  The term "non-silicone medium" or "non-silicone organic medium" means a medium comprising one or more non-silicone compounds, in particular organic compounds, as defined below, said non-silicone compounds being predominantly present, ie that is to say at least 50% by weight, especially 50 to 100% by weight, for example 60 to 99% or 65 to 95% by weight, relative to the total weight of the medium, that is to say to say of the mixture 'possible silicone compounds + non-silicone organic compounds + possible water'. Said non-silicone medium may therefore optionally comprise silicone compounds which may be present in a maximum amount of 50% by weight, especially from 0 to 40% by weight, or even from 1 to 35% by weight, and still from 5-30% by weight. by weight relative to the total weight of the medium.

  The term "silicone medium" or "silicone organic medium" means a medium consisting mainly of one or more silicone compounds as defined below, that is to say a medium in which said silicone compounds represent at least 50% by weight, especially from 50 to 100% by weight, for example from 60 to 99% or else from 65 to 95% by weight, of all the liquid constituents 'silicone compounds + possible non-silicone compounds + possible water' constituting said middle. Said medium may therefore optionally comprise non-silicone compounds which may be present in a maximum amount of 50% by weight, in particular from 0 to 40% by weight, or even from 1 to 35% by weight, and still from 5-30% by weight. weight relative to the total weight of the medium.

  Among the non-silicone compounds that may be present in said organic, silicone or non-silicone medium, mention may be made of: non-aqueous, non-silicone liquid compounds having an overall solubility parameter according to the Hansen solubility space less than or equal to (MPa) '' 2, preferably less than or equal to 18 (MPa) 112, still more preferably less than or equal to 17 (MPa) 112 - monoalcohols having an overall solubility parameter according to the Hansen solubility space less than or equal to 20 (MPa) 112; and - mixtures thereof.

  The global solubility parameter 8 according to the solubility space of Hansen is defined in the article Solubility parameter values of Eric A. Grulke of Polymer Handbook, 3rd edition, Chapter VII, p.519-559 by the relation: 8 = (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, and - dH characterizes the specific interaction forces (hydrogen bonds, acid / base, donor / acceptor, etc.) type.

  The definition of solvents in the solubility space according to Hansen is described in the article by C.M.Hansen The three dimensional solubility parameters J.Paint Technol. 39, 105 (1967).

  Among the non-aqueous, non-silicone liquid compounds having an overall solubility parameter according to the Hansen solubility space less than or equal to 20 (MPa) 112, mention may be made of liquid fatty substances, in particular volatile or nonvolatile oils, which may be chosen from natural or synthetic oils, carbonaceous, hydrocarbon, fluorinated, silicone, optionally branched, alone or in mixture.

  By "oil" is meant any nonaqueous liquid medium at ambient temperature (25 C) and atmospheric pressure (760 mmHg), compatible with an application on the skin, the mucous membranes (lips) and / or the integuments (nails, eyelashes, eyebrows, hair).

  The term "non-volatile oil" means an oil capable of remaining on the skin at room temperature and atmospheric pressure for at least one hour and having in particular a vapor pressure at ambient temperature (25 C) and atmospheric pressure, which is not zero, less than 0.01 mmHg (1.33 Pa).

  Nonvolatile oils that can be used in the invention include non-volatile, non-silicone oils, especially hydrocarbon oils, such as liquid paraffin (or petroleum jelly), squalane, hydrogenated polyisobutylene (Parleam® oil), perhydrosqualene, mink oil, turtle oil, soy oil, sweet almond oil, calophyllum oil, palm oil, grape seed oil, sesame oil, maize oil, arara oil, rapeseed oil, sunflower oil, cotton oil, apricot, castor oil, avocado, jojoba, olive or cereal sprouts; esters of lanolic acid, oleic acid, lauric acid, stearic acid; esters derived from acids or long-chain alcohols (that is to say having from 6 to 20 carbon atoms), in particular the RCOOR '-formula esters in which R represents the residue of an acid 7 to 19 carbon atoms and R 'represents a hydrocarbon chain comprising from 3 to 20 carbon atoms, in particular the C 12 -C 36 esters, such as isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethyl hexyl palmate, 2-hexyl decyl laurate, 2-octyl decyl palmitate, myristate or 2-octyl-dodecyl lactate, di (2-ethyl hexyl) succinate, diisostearyl malate, glycerin or diglycerine triisostearate; higher fatty acids, especially C14-C22 fatty acids, such as myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid or isostearic acid; higher fatty alcohols, especially C16-C22, such as cetanol, oleic alcohol, linoleic or linolenic alcohol, isostearyl alcohol or octyl dodecanol; and their mixtures.

  As volatile oil that may be used according to the invention, non-silicone volatile oils may be used, in particular C 8 -C 16 isoparaffins such as isododecane, isodecane and isohexadecane, for example the oils sold under the trade names ISOPAR. of PERMETHYL and in particular isododecane (PERM ETHYL 99 A).

  Of the non-aqueous, non-silicone liquid compounds having an overall solubility parameter according to the Hansen solubility space less than or equal to 20 (MPa) 1'2, mention may also be made of: linear, branched or cyclic esters having more of 6 carbon atoms, especially 6 to 30 carbon atoms, - ethers having more than 6 carbon atoms, especially 6 to 30 carbon atoms; and ketones having more than 6 carbon atoms, especially 6 to 30 carbon atoms.

  linear, branched and / or cyclic alkanes which may be volatile, and in particular paraffin oils, petroleum jelly or hydrogenated polyisobutylene.

  By monoalcohols having an overall solubility parameter according to the Hansen solubility space less than or equal to 20 (MPa) 1'2, it is understood that the aliphatic fatty alcohols having 6 to 30 carbon atoms, the hydrocarbon chain not containing substitution grouping. As monoalcohols according to the invention, mention may be made of oleic alcohol, decanol, dodecanol, octadecanol and linoleic alcohol.

  Among the silicone compounds that may be present in said organic, silicone or non-silicone medium, mention may be made of silicone non-aqueous liquid compounds having an overall solubility parameter according to the Hansen solubility space of less than or equal to 20 (MPa) 1'2, preferably less than or equal to 17 (MPa) "2.

  In particular, there may be mentioned silicone oils, optionally branched, volatile and / or non-volatile.

  Among the nonvolatile silicone oils, mention may be made of non-volatile polydialkylsiloxanes, such as non-volatile polydimethylsiloxanes (PDMS); polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, during or at the end of the silicone chain, groups having from 2 to 24 carbon atoms; phenyl silicones such as phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, polymethylphenylsiloxanes; polysiloxanes modified with fatty acids (especially C8-C20), with fatty alcohols (especially C8-C20) and / or with polyoxyalkylenes (especially polyoxyethylene and / or polyoxypropylene); aminated polysiloxanes; hydroxyl group-containing polysiloxanes; fluorinated polysiloxanes comprising a fluorinated group during or at the end of the silicone chain having from 1 to 12 carbon atoms all or part of the hydrogen atoms of which are substituted by fluorine atoms; and their mixtures.

  As the volatile silicone oil that may be used in the invention, mention may be made of linear or cyclic silicones having from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups having from 1 to 10 carbon atoms. In particular, there may be mentioned octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and mixtures thereof.

  The choice of the monomers constituting the backbone of the polymer, the choice of the macromonomer, the molecular weight of the polymer, the macromonomer and the proportion of said macromonomers and monomers will be a function of the organic polymerization medium and / or the organic dispersion medium, so as finally to obtain a dispersion of stable solid particles of polymers in said medium, this choice being able to be made by those skilled in the art.

  By "stable dispersion" is meant, according to the invention, a dispersion which is not likely to form solid deposition or liquid / solid phase shift especially after centrifugation, for example, at 4000 revolutions / minute for 15 minutes.

  The ethylenic polymers forming the particles dispersed in the organic dispersion medium therefore comprise an insoluble backbone in said medium and a portion soluble in said medium.

  These polymers may be in various forms, particularly in the form of random polymers.

  According to the invention, the term "ethylenic polymer" is understood to mean a polymer that can be obtained by radical polymerization, in an organic polymerization medium, of: at least one monomer with an optical effect as defined hereinafter, optionally in mixing with at least one additional ethylenic monomer, preferably at least one (meth) acrylic monomer, to form said insoluble backbone; and - at least one macromonomer having a polymerizable terminal group to form the side chains.

  The optically or optically active monomer corresponds to formula (1): (1) R2 X'R3 in which: the groups R2 and X'R3 are present on the same ring or each on a different ring; - R2 and R3 represent, independently of one another, a hydrogen atom, a halogen or a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 30 carbon atoms; optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, Si and S; X and X 'represent, independently of one another, -O-, -S-, -SO-, -SO2-, -NHou -NR4- with R4 representing a linear, branched and / or cyclic carbon radical; saturated and / or unsaturated, comprising 1 to 30 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; -p is equal toOu1; G is a divalent linear, branched and / or cyclic, saturated and / or unsaturated carbon radical comprising 1 to 30 carbon atoms, optionally substituted with one or more groups chosen from = 0, OH; , NH2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; P is a polymerizable group chosen from one of the following formulas: embedded image in which: R 'represents H or a hydrocarbon radical, linear or branched, saturated with C 1 -C 6, -negative to 0 or 1 and m is equal to 0 or 1.

  In the present invention, the term "cyclic radical" is understood to mean a monocyclic or polycyclic radical, which is therefore itself in the form of one or more rings, saturated and / or unsaturated, optionally substituted (for example cyclohexyl, cyclodecyl or benzyl). or fluorenyl), but also a radical which comprises one or more of said rings (for example p-tertbutylcyclohexyl or 4-hydroxybenzyl).

  In the present invention, the term "saturated and / or unsaturated radical" means fully saturated radicals, totally unsaturated radicals, including aromatic radicals, as well as radicals comprising one or more double and / or triple linkages, the rest of the links being single links.

  The radical R 2 is preferably a hydrogen atom.

  The radical R 3 is preferably a saturated and / or unsaturated, hydrocarbon-based, cyclic, linear and / or branched, radical, optionally comprising: ## STR2 ## IIIa) a hydrocarbon ring which is itself saturated and / or unsaturated, comprising 2 to 18, in particular 3 to 14, or even 6 to 12, carbon atoms, and can comprise at least one heteroatom, in particular one, two or three atoms of nitrogen, sulfur and / or oxygen. In particular, R 3 can be an n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, cyclopentyl, n-hexyl, cyclohexyl, n-heptyl, n-octyl, cyclooctyl, decyl, cyclodecyl or dodecyl radical. cyclododecyl, pterbutylcyclohexyl, benzyl, phenyl.

  In particular, X'R3 may be an NH- (CH2) nH radical; -O- (CH2) nH, for example ethoxy or methoxy; -S- (CH2) nH, -SO- (CH2) nH or SO2- (CH2) nH with n being an integer from 1 to 30, especially from 4 to 12; or -C6-C18NHcycloalkyl, especially NH-cyclohexyl, NH-cyclooctyl, -NHcyclodecyl, NH-cyclododecyl; or else C 6 -C 18 S-cycloalkyl, C 6 -C 18 -SOcycloalkyl or C 6 -C 18 SO 2 -cycloalkyl; or else a radical chosen from the following: CH 3 CH 3 O-CH 3 K CH 3 N C

H CH3

NH NH

S

1 1 C2HeCH3

S He

O O

o (I I

O

2871468 10

S O

I SI o O

NOT-

-S

  The divalent radical G is preferably a linear, branched and / or cyclic, saturated and / or unsaturated divalent hydrocarbon radical, optionally comprising a hydrocarbon ring which is itself saturated or unsaturated, comprising in total 2 to 18, in particular 3 to 8 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, S and Si.

  Preferentially, G is chosen from saturated linear or branched divalent hydrocarbon radicals optionally comprising a saturated hydrocarbon ring, comprising in total 2 to 16, in particular 3 to 10 carbon atoms. Thus G may be chosen from methylene, ethylene, n-propylene, isopropylene (or methyl-1 ethylene and 2-methylethylene), n-butylene, isobutylene, pentylene and especially n-pentylene, hexylene, especially n-hexylene or cyclohexyl groups. lene, heptylene, octylene, cyclooctylene, decylene, cyclodecylene, cyclohexyldimethylene, dodecylene, cyclododecylene.

  The divalent radical X is preferably chosen from -O-, -S-, -NH- or NR4-, preferentially 0.

  The radical R4, when present, preferably represents a linear, branched and / or cyclic hydrocarbon radical, saturated or unsaturated, comprising 2 to 12 carbon atoms, optionally substituted with one or more groups chosen from = 0, OH, NH 2 . In particular, R 4 can be an ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, dodecyl, phenyl or benzyl radical.

Preferably, p is 1.

  The polymerizable group P is preferably chosen from one of the following formulas: ## STR2 ##

H / Ç H

O

  in which R 'is H or methyl.

  Among the monomeric compounds that are particularly preferred according to the invention, there may be mentioned compounds corresponding to one of the following formulas:

H o- o

H o

ll C ,, Hzs

HN

  Some of these compounds may in particular be prepared according to the state of the art, for example according to the teaching of EP728745, in particular the compounds for which X is N. In a schematic manner, the general method of synthesis may be represented as follows: NH2 R2 R'3 The appropriate naphthalic anhydride can thus be reacted with a suitable primary HO-G-NH2 amine. Preferably, the amine is present in slight excess with respect to the naphthalic anhydride, in particular in a proportion of 1 to 1.5 equivalents, preferably 1.1 equivalents, per 1 equivalent of anhydride. The reaction may be carried out in a solvent selected by the solvents in which the anhydride is soluble, and in particular toluene, xylene, acetic acid, NMP or ethanol; the reaction is preferably carried out at reflux of the solvent, for example at a temperature of 50-250 ° C., preferably 75 ° -150 ° C.

  Then the imide formed can be reacted with an alcohol or thiol. For example, when R'3 is a halogen (preferably chlorine or bromine), it is possible to carry out an aromatic nucleophilic substitution, for example using an alcohol or a thiol, such as ethanol, cyclohexanol or dodecanethiol. optionally in the form of alkali metal alkoxide (sodium, for example). The reaction may be carried out in the absence of a solvent, or in the presence of an aprotic dipolar solvent, such as dichloromethane or THF (tetrahydrofuran), in particular at a temperature of 20 ° -150 ° C.

  The sulfur derivatives can be oxidized under mild conditions so as to lead to the corresponding sulfoxide. By modifying the conditions of the oxidation, it is also possible to prepare the corresponding sulfone. These sulfides, sulfoxides and sulfones can then be converted to obtain the desired methacrylates or acrylates.

  As for the alcoholic derivatives, they can be reacted with a (meth) acryloyl halide, especially a chloride, so as to form the corresponding (meth) acrylate. This reaction may be carried out in the presence of a base such as triethanolamine, in a solvent such as tetrahydrofuran or dichloromethane, especially at a temperature of -30 ° C. to 100 ° C., preferably 0 ° to 80 ° C.

  It is of course possible to use a monomer mixture of formula (I) to form the dispersion polymer according to the invention.

  Preferably, the monomer with an optical effect, alone or as a mixture, is present in a proportion of 0.005 to 40% by weight, especially 0.01 to 20% by weight, or even 0.1 to 10% by weight, and even more preferably 0 to 10% by weight. 5 to 5% by weight, based on the weight of the final ethylenic polymer.

  The ethylenic dispersion polymer according to the invention may also comprise, optionally but not limited to, at least one additional ethylenic monomer, which is preferably chosen from monomers whose homopolymer is insoluble in the organic dispersion medium in question, that is, the homopolymer is in solid (or undissolved) form at a concentration greater than or equal to 5% by weight at room temperature (20 C) in said organic dispersion medium.

  It is of course possible to use a mixture of different ethylenic monomers, and in particular a mixture of different (meth) acrylic monomers.

  Preferably, the additional ethylenic monomer, alone or as a mixture, is present in a proportion of 40 to 99.495% by weight, in particular 50-98% by weight, or even 60 to 95% by weight, preferably 75 to 92% by weight. or 80 to 90% by weight, based on the weight of the final ethylenic polymer.

  In a preferred embodiment, the at least one additional ethylenic monomer comprises at least one (meth) acrylic monomer as defined hereinafter. Preferably, the monomer (meth) acrylic, alone or as a mixture, represents 60 to 100% by weight, in particular 75 to 99.5% by weight, or even 85 to 99% by weight, of the total weight of additional ethylenic monomers. any optional 100% supplement consisting of non-(meth) acrylic ethylenic monomers, alone or as a mixture.

  As monomer (meth) acrylic may be used to constitute, with the monomer or monomers of formula (I), after polymerization the insoluble backbone of the polymer, may be mentioned, alone or in mixture, the following monomers, and their salts (i) (meth) acrylates of formula CH2 = CHCOOR'3 or CH2 = C (CH3) OO0R'3 in which R'3 represents: a linear or branched alkyl group comprising 1 to 18 carbon atoms, wherein one or more heteroatoms selected from O, N, S and P and / or said alkyl group may be optionally substituted by one or more substituents selected from OH, the halogen atoms ( Cl, Br, I and F), -NR4R5 groups, wherein R4 and R5, which are identical or different, represent hydrogen or a linear or branched C1-C6 alkyl group or a phenyl group; and / or polyoxyalkylene groups, especially polyoxyethylene and / or polyoxypropylene groups, said polyoxyalkylene group consisting of the repetition of 5 to 30 oxyalkylene units; a C 3 to C 12 cycloalkyl group, said cycloalkyl group possibly comprising in its chain one or more heteroatoms chosen from O, N, S and / or P, and / or which may be optionally substituted by one or more substituents chosen from OH and halogen atoms (Cl, Br, I and F); a C4 to C20 aryl or C5 to C30 aralkyl group (C1 to C8 alkyl group); in particular R'3 may be methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, hexyl, ethylhexyl, octyl, lauryl, isooctyl, isodecyl, dodecyl, cyclohexyl, t-butylcyclohexyl, stearyl, ethyl-2- perfluorohexyl, 2-hydroxyethyl, 2-hydroxybutyl, 2-hydroxypropyl, methoxyethyl, ethoxyethyl, methoxypropyl, isobornyl, phenyl, 2-phenylethyl, t-butylbenzyl, benzyl, furfurylmethyl or tetrahydrofurfurylmethyl, methoxy-polyoxyethylene (or POE-methyl); POE-behenyl, trifluoroethyl; dimethylaminoethyl, diethylaminoethyl, dimethylaminopropyl.

  (ii) (meth) acrylamides of formula CH2 = CHCONR'4R'5 or CH2 = C (CH3) CONR'4R'5 in which R'4 and R'5, identical or different, represent a hydrogen atom or: a) a linear or branched alkyl group having from 1 to 18 carbon atoms in which one or more heteroatoms selected from O, N, S and P are optionally intercalated; said alkyl group may further be optionally substituted with one or more substituents selected from hydroxyl groups, halogen atoms (Cl, Br, I and F), and Si (R4R5) groups, wherein R4 and R5 are the same or different represent a C1-C6 alkyl group or a phenyl group; and especially a methyl, ethyl, propyl, n-butyl, isobutyl, tert-butyl, hexyl, ethylhexyl, octyl, lauryl, isooctyl, isodecyl, dodecyl, cyclohexyl, t-butylcyclohexyl or stearyl group; ethyl-2-perfluorohexyl; or a C1-4 hydroxyalkyl group such as 2-hydroxyethyl, 2-hydroxybutyl and 2-hydroxypropyl; or a (C1-4) alkoxy (C1-4) alkyl group such as methoxyethyl, ethoxyethyl and methoxypropyl, b) a C3-C12 cycloalkyl group, such as isobornyl group, or a heterocycloalkyl (alkyl group of 1 to 4 carbon atoms) ), such as furfurylmethyl or tetrahydrofluorophyllyl, c) a C 5 to C 20 aryl group such as phenyl, d) a C 5 to C 10 aralkyl group (C 2 to C 6 alkyl group such as 2-phenyl- ethyl, tert-butylbenzyl or benzyl; (iii) ethylenically unsaturated (meth) acrylic monomers containing at least one carboxylic, phosphoric or sulphonic acid function, such as acrylic acid, methacrylic acid; acrylamidopropanesulfonic acid and their salts, Among these (meth) acrylic monomers, mention may be made especially of methyl, ethyl, n-propyl, isopropyl, butyl and isobutyl (meth) acrylates. methoxyethyl or ethoxyethyl (meth) acrylates; tr (meth) acrylate; dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, acrylic acid, methacrylic acid, (meth) acrylate, meth) acrylamide, N-ethyl (meth) acrylamide, N-butyl (meth) acrylamide, Nt-butyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide N, N-dibutyl (meth) acrylamide, N-octyl (meth) acrylamide, N-dodecyl (meth) acrylamide, undecyl (meth) acrylamide, N (2-hydroxypropyl) (meth) acrylamide, dimethylaminopropyl (meth) acrylamide), as well as their salts; and mixtures thereof Preferably, the (meth) acrylic monomers are selected from methyl acrylate, methyl methacrylate, acrylic acid and methacrylic acid, as well as mixtures thereof.

  Among the additional non (meth) acrylic ethylenic monomers that may be mentioned are vinyl esters of formula: R 6 -COO-CH =CH 2 in which R 6 represents a linear or branched alkyl group comprising from 1 to 6 atoms, or a group cyclic alkyl having from 3 to 6 carbon atoms and / or an aromatic group, for example of the benzene, anthracene, and naphthalenic type; ethylenic hydrocarbons having 2 to 10 carbons, such as ethylene, isoprene or butadiene; monomers containing ethylenic unsaturation (s) comprising at least one carboxylic, phosphoric or sulphonic acid or anhydride function, for example crotonic acid, maleic anhydride, itaconic acid, fumaric acid or maleic acid, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid and salts thereof; ethylenically unsaturated monomers containing at least one tertiary amine function such as 2-vinylpyridine or 4-vinylpyridine; the vinyl compounds of formulas: CH 2 CHCH-R 9, CH 2 CHCH-CH 2 -R 9 or CH 2 CC (CH 3) -CH 2 -R 9 in which R 9 is a hydroxyl, halogen (CI or F), NH 2, OR 10 group where R 10 represents a phenyl group or a C1-C12 alkyl group (the monomer is a vinyl or allyl ether); acetamide (NHCOCH3); an OCOR11 group where R11 represents a linear or branched alkyl group of 2 to 12 carbons (the monomer is a vinyl or allyl ester); or a group chosen from: a linear or branched alkyl group of 1 to 18 carbon atoms in which one or more heteroatoms chosen from O, N, S and P are optionally intercalated; said alkyl group may further be optionally substituted with one or more substituents selected from hydroxyl groups, halogen atoms (Cl, Br, I and F), and Si (R4R5) groups, wherein R4 and R5 are the same or different represent a C1-C6 alkyl group or a phenyl group; a C 3 to C 12 cycloalkyl group such as isobornyl, cyclohexane, a C 4 to C 20 aryl group such as phenyl, a C 5 to C 30 aralkyl group (C 1 to C 8 alkyl group) such as 2-phenylethyl; benzyl, - a 4- to 12-membered heterocyclic group containing one or more heteroatoms selected from O, N, and S, the ring being aromatic or not, - a heterocycloalkyl (alkyl of 1 to 4 C), such as furfurylmethyl or tetrahydrofurfurylmethyl - and their salts and mixtures.

  Among the salts, mention may be made of those obtained by neutralization of acid groups using inorganic bases such as LiOH, NaOH, KOH, Ca (OH) 2, NH 4 OH or Zn (OH) 2; or with an organic base such as a primary, secondary or tertiary alkylamine, especially triethylamine or butylamine. This primary, secondary or tertiary alkylamine may comprise one or more nitrogen and / or oxygen atoms and may therefore comprise, for example, one or more alcohol functions; mention may especially be made of 2-amino-methyl-2-propanol, triethanolamine and dimethylamino-2-propanol. We can also mention lysine or 3- (dimethylamino) -propylamine.

  Mention may also be made of mineral acid salts, such as sulfuric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, phosphoric acid and boric acid. Mention may also be made of organic acid salts, which may comprise one or more carboxylic acid, sulphonic acid or phosphonic acid groups. They may be linear, branched or cyclic aliphatic acids or aromatic acids. These acids may furthermore comprise one or more heteroatoms chosen from O and N, for example in the form of hydroxyl groups. These include propionic acid, acetic acid, terephthalic acid, citric acid and tartaric acid.

  Additional ethylenic monomers that may be mentioned include vinylcyclohexane, styrene, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl ethylhexanoate, vinyl neononanoate and vinyl neododecanoate. vinyl methyl ether, vinyl ethyl ether and vinyl isobutyl ether.

  Among the additional ethylenic monomers that can be used, mention may also be made of the monomers with an optical effect of formula (A) and / or of formula (B) and / or of formula (C) below, alone or in mixture, Ra2, Ra3 Raz, Ri (A) (B) (C) in which: Rai represents a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 32 carbon atoms; optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; - Rbl is chosen from (i) a hydrogen atom, (ii) a halogen, (iii) a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 12 carbon atoms, optionally substituted by one or more groups chosen from = 0, OH, NH 2 and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, Si and S; (iv) a group NRR 'with R and R' being, independently of one another, a hydrogen atom or a hydrocarbon radical, linear, cyclic or branched, saturated C1-6, in particular methyl, ethyl, propyl isopropyl, n-butyl, isobutyl, tert-butyl, pentyl or hexyl; Ra2 and Ra3, present on the same ring or each on a different ring, represent, independently of one another, a hydrogen, a halogen, or a group of formula -Xa-Ga-Pa (II) provided that at least one of Ra2 and / or Ra3 is a group of formula (II), wherein: Xa is selected from -O-, -S-, -SO-, -SO2 -, -NH- or -NR4- with R4 representing a linear, branched and / or cyclic, saturated and / or unsaturated carbon radical containing 1 to 30 carbon atoms, optionally substituted by one or more groups chosen from = 0, OH , NH2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; Ga is a divalent linear, branched and / or cyclic, saturated and / or unsaturated divalent carbon radical comprising 1 to 32 carbon atoms, optionally substituted with one or more groups chosen from = 0, OH, NH 2, and the atoms of halogens; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; Pa is a polymerizable group chosen from one of the following formulas: ## STR1 ## ## STR2 ##

O

  (Illa) in which: (IIIb) (IIIc) - R 'represents H or a linear or branched, saturated C1-6 hydrocarbon radical, - X' represents O, NH or NR "with R" representing a radical chosen from C1-6 alkyl, C6-10 aryl, C6-10 aryl alkyl (C1-6) alkyl or C6-10 aryl (C1-6) aryl radicals, with the alkyl and / or aryl groups further be substituted with one or more groups selected from OH, halogen, C 1-6 alkoxy and C 6-10 aryloxy; and is equal to 0 or 1; n is equal to 0 or 1; p is 0, 1 or 2; B represents one of the following divalent aromatic groups (IVa) to (IVd): R1 (IVa) (IVb) (IVd) in which: R1 is a linear, branched and / or cyclic carbon radical, saturated and or unsaturated, comprising 1 to 32 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; - R20 and R21 are, independently of one another, a hydrogen atom, a linear or branched C1-8 alkyl radical, a cyclopentyl, cyclohexyl, cyclooctyl, cyclodecyl, cyclododecyl, benzyl, naphthyl or phenyl radical.

  When the polymer comprises one or more additional monomers with an optical Zo effect of formula (A) and / or (B) and / or (C), these monomers are preferably present in a proportion of from 0.005% to 39.995% by weight, in particular 0 , 01 to 20% by weight, or even 0.05 to 10% by weight, relative to the weight of the final polymer, the optional supplement consisting of one or more additional ethylenic monomers of the (meth) acrylic or non-(meth) acrylic type (meth ) as defined above.

  It is understood that the additional ethylenic monomers and / or unpolymerized optical effect monomers may be soluble in the dispersion medium and / or polymerization considered; however, the ethylenic polymer formed by polymerization of these monomers is insoluble in said dispersion medium and is in the form of a dispersion of solid particles of said polymer in said medium.

  According to one embodiment of the invention, the ethylenic polymer does not comprise additional ethylenic monomers (meth) acrylic as described above. In this embodiment, the insoluble backbone of the ethylenic polymer is formed solely of monomers of formula (I) and optionally additional (meth) acrylic monomers as described above.

  According to the invention, the term "macromonomer" or "macromonomer having a polymerizable end group" any polymer, in particular oligomeric, having on one of its ends a terminal group, in particular a polymerizable group, capable of reacting during the polymerization reaction with the monomers considered, to form the side chains of the ethylenic polymer; said terminal group may advantageously be an ethylenically unsaturated group capable of polymerizing radically with the monomers constituting the backbone.

  Preferably, the macromonomer is chosen from macromonomers whose homopolymer is soluble in the organic dispersion medium in question, that is to say completely dissolved at a concentration greater than or equal to 5% by weight and at room temperature (25%). C) in said organic medium.

  Thus, in the end, the ethylenic polymers according to the invention are in the form of polymers that are insoluble in the dispersion medium in question, and comprise a skeleton (or main chain) constituted by a sequence of particularly acrylic units resulting from the polymerization, in particular from one or more (meth) acrylic and / or ethylenic monomers and one or more optical effect / property monomers, and side chains (or grafts) derived from the reaction of the macromonomers, said side chains being covalently bound to said main chain. The backbone (or main chain) is insoluble in the dispersion medium considered while the side chains (or grafts) are soluble in said medium.

  The macromonomers constituting after reaction the side chains of the polymer according to the invention comprise at the end of the chain a terminal group capable of reacting during the polymerization with the monomers with optical properties, and / or acrylic and / or vinyl, to form said chains, said polymerizable terminal group being in particular a vinyl group, preferably an acrylate or methacrylate group (also called (meth) acryloyloxy).

  The macromonomers are preferably chosen from macromonomers whose homopolymers have a glass transition temperature (Tg) of less than or equal to 25 ° C., in particular ranging from 100 ° C. to 25 ° C., preferably ranging from -80 ° C. to 0 ° C. inclusive.

  Preferably, the macromonomers according to the invention have a weight average molecular mass (Mw) ranging from 200 to 100,000, preferably from 300 to 50,000, in particular from 500 to 20,000, preferably from 800 to 10,000, or even from 1000 to 6000.

  As macromonomers, it is possible to use either non-silicone, especially carbon-based macromonomers, or silicone macromonomers.

  The term "carbon-based macromonomer" is understood to mean an oligomeric macromonomer obtained by polymerization of ethylenically unsaturated monomer (s), and mainly by polymerization of non-acrylic acrylic and / or vinyl monomers.

  By "silicone macromonomer" is meant an organopolysiloxane macromonomer, and in particular a polydimethylsiloxane macromonomer.

  Mention may in particular be made of: - (i) homopolymers and copolymers of C6-C22, preferably C8-C18, linear or branched alkyl (meth) acrylate having a polymerizable terminal group selected from vinyl groups or meth) acrylate; and especially macromonomers of poly (2-ethylhexyl acrylate) end-monoacrylate or monomethacrylate; macromonomers of poly (dodecyl acrylate) or of dodecyl polymethacrylate) with a monoacrylate or monomethacrylate end; macromonomers of poly (stearyl acrylate) or stearyl polymethacrylate) with monoacrylate or monomethacrylate end.

  Such macromonomers are in particular described in patents EP895467 and EP96459 and in Gillman K.F., Polymer Letters, Vol. 5, p. 477-481 (1967).

  (ii) polyolefins having an ethylenically unsaturated end group of vinyl type or preferably having a (meth) acrylate end group. In particular, the following macromonomers can be mentioned, it being understood that they have a terminal (meth) acrylate group: polyethylene macromonomers, polypropylene macromonomers, polyethylene / polypropylene copolymer macromonomers, and polyethylene / polybutylene copolymer macromonomers. polyisobutylene macromonomers; polybutadiene macromonomers; polyisoprene macromonomers; poly (ethylene / butylene) -polyisoprene macromonomers; Such macromonomers are in particular described in EP1347013 or in US5625005 which mentions ethylene / butylene and ethylene / propylene macromonomers with a (meth) acrylate reactive end group.

  In particular, these macromonomers may be represented by the following formula: ## STR2 ## in which R 1, R 2 and R 3, independently of one another, represent hydrogen or a linear alkyl group cyclic or branched having 1 to 16 carbon atoms, especially 1 to 6; preferably hydrogen; and X represents a polyethylene and / or polypropylene and / or polybutylene chain.

  In particular, mention may be made of poly (ethylenelbutylene) methacrylate, such as that sold under the name Kraton Liquid L-1253 by Kraton Polymers.

  Among the silicone macromonomers, mention may in particular be made of polydimethylsiloxanes containing a mono (meth) acrylate end group, and in particular those of the following formula (IIa): ## STR2 ## in which: CH 3 Si R 10 CH n 3 - R 8 denotes a hydrogen atom or a methyl group; preferably methyl; - R9 denotes a divalent hydrocarbon group, linear or branched, preferably linear, having from 1 to 10 carbon atoms and optionally containing one or two -O- ether bonds; preferably ethylene, propylene or butylene; - Rio denotes a linear or branched alkyl group having 1 to 10 carbon atoms, especially 2 to 8 carbon atoms; preferably methyl, ethyl, propyl, butyl or pentyl; n denotes an integer ranging from 1 to 300, preferably ranging from 3 to 200, and preferably ranging from 5 to 100.

  Silicone macromonomers that may especially be mentioned include monomethacryloyloxypropyl polydimethylsiloxanes such as those sold under the name PS560-K6 by UCT (United Chemical Technologies Inc.) or under the name MCR-M17 by Gelest Inc. The macromonomers are preferably present in the ethylenic polymers of the invention, alone or as a mixture, in a proportion of 0.5 to 20% by weight, in particular from 1 to 18% by weight, preferably from 2 to 16% by weight, and in particular from 4 to 15% by weight, among others 6 to 13% by weight, or even 8 to 12% by weight, relative to the total weight of said polymer.

  According to a first embodiment of the invention, the organic dispersion medium may be a non-silicone medium; in this case, the macromonomers present in the ethylenic polymer are advantageously carbon-based macromonomers; preferably, the ethylenic polymer is advantageously a non-silicone polymer.

  According to a second embodiment of the invention, the organic dispersion medium may be a silicone medium; in this case, the macromonomers present in the ethylenic polymer are advantageously silicone macromonomers; preferably, the ethylenic polymer is advantageously a silicone polymer.

  Particularly advantageous polymers according to the invention are those obtained by polymerization, with a monomer of formula (I): - methyl acrylate and a methacrylate-terminated polyethylene / polybutylene macromonomer in a solvent such as isododecane, l isononylisononanoate, octyldodecanol, diisostearyl malate or a C12-C15 alkyl benzoate (such as Finsolv TN); a mixture of methyl acrylate / methyl methacrylate monomers and a methacrylate-terminated polyethylene / polybutylene macromonomer, especially in isododecane; a mixture of methyl acrylate / acrylic acid monomers and a methacrylate-terminated polyethylene / polybutylene macromonomer in a solvent such as isododecane; methyl acrylate and a monomethacryloyloxypropylpolydimethylsiloxane macromonomer, in particular in decamethylcyclopentasiloxane or phenyltrimethicone; of methyl acrylate, acrylic acid and a monomethacryloyloxypropylpolydimethylsiloxane macromonomer, in particular in decamethylcyclopentasiloxane or phenyltrimethicone.

  Preferably, the ethylenic polymer has a weight average molecular weight (Mw) of between 10,000 and 500,000, especially between 20,000 and 300,000, more preferably between 25,000 and 200,000, or even between 30,000 and 150,000.

  Preferably, the ethylenic polymer according to the invention is a film-forming polymer. By "film-forming" polymer is meant a polymer capable of forming on its own or in the presence of an auxiliary film-forming agent, a continuous and adherent film on a support, in particular on keratin materials.

  The polymer according to the invention is in particular a non-crosslinked polymer. In particular, the polymer is obtained by polymerization of monomers comprising a single polymerizable group.

  Thanks to the aforementioned characteristics, in a given organic medium, the polymers have the ability to fold on themselves, thus forming solid particles of substantially spherical shape, with around the periphery of these particles the extended lateral chains, which ensure the stability of these particles. Such particles resulting from the characteristics of the polymers of the invention have the particular feature of not agglomerate in said medium and thus to self-stabilize and form a dispersion of particularly stable polymer particles.

  In particular, the polymers of the invention are capable of forming nanoscale soli-particles of average size ranging from 10 to 400 nm, preferably from 20 to 200 nm. Because of this very small size, the particles involved in the constitution of the dispersion are particularly stable and therefore unlikely to form agglomerates. The dispersion of the invention is therefore a stable dispersion in the medium in question and does not form sediment, when it is placed for a prolonged period (for example 24 hours) at room temperature (25 ° C.).

  Preferably, the dispersion of particles has a solids content (or dry extract) polymer of 20% to 70% by weight of dry matter, especially 30 to 65% by weight, or even 40 to 60% by weight.

  The said dispersion of polymer particles may be prepared by a process comprising a step of carrying out a radical copolymerization, in an organic medium known as "polymerization" as defined above, of one or more monomers as defined previously with a or more macromonomers as defined above.

  In a conventional manner, the copolymerization can be carried out in the presence of a polymerization initiator. The polymerization initiators may be free radical initiators. In general, such a polymerization initiator may be chosen from peroxidized organic compounds such as dilauroyl peroxide, dibenzoyl peroxide and tert-butyl peroxy-2-ethylhexanoate; diazotized compounds such as azobisisobutyronitrile, azobisdimethylvaleronitrile. The reaction may also be initiated using photoinitiators or by radiation such as UV, neutron or plasma.

  In general, to carry out this process, at least a portion of the organic polymerization medium, which is preferably a medium, is introduced into a reactor of a size appropriate to the quantity of polymer that will be produced. solvent of the monomer of formula (I), all or part of the monomers of formula (I) and at least a part of any additional monomers, which will constitute, after polymerization, the insoluble skeleton, the totality of the macromonomer (which will constitute the side chains of the polymer) and a part of the polymerization initiator. At this stage of introduction, the reaction medium forms a relatively homogeneous medium.

  The reaction medium is then stirred and heated to a given temperature, so as to obtain a polymerization of the monomers and macromonomers. After a while, the initially homogeneous and clear medium generally leads to a milky or colored dispersion. A mixture consisting of the remaining portion of monomers and the polymerization initiator is then added. After a suitable time during which the mixture is generally heated with stirring, the medium stabilizes in the form of a milky or colored dispersion, the dispersion comprising stabilized polymer particles in the mid-place in which they were created, said stabilization being due to the presence in the polymer of side chains soluble in said medium.

  It is also possible to prepare the dispersion of solid particles of polymer in an organic polymerization medium which can subsequently be replaced by an organic dispersion medium within the meaning of the invention. Thus, the organic dispersion medium, corresponding to the medium in which the ethylenic polymer is supplied, may be identical to or different from the polymerization medium.

  In the latter case, the polymerization medium may be substituted in whole or in part by another organic medium, the dispersion medium, which may be added, after polymerization, to the polymerization medium. The latter is then evaporated in whole or in part.

  The dispersion of solid particles of polymers according to the invention can be used in any type of composition and in particular in a cosmetic or pharmaceutical composition comprising a cosmetically or pharmaceutically acceptable medium, that is to say a medium compatible with keratin materials such as as the skin of the face or body, hair, eyelashes, eyebrows and nails.

  The dispersion may be present in a proportion of 3 to 95% by weight in the composition, in particular 4-90% by weight, or even 5-70% by weight, preferably 10 to 50% by weight.

  The composition may thus comprise a hydrophilic medium comprising water or a mixture of water and hydrophilic organic solvent (s) such as alcohols and in particular linear or branched lower monoalcohols having from 2 to 5 carbon atoms such as ethanol, isopropanol or n-propanol, and polyols such as glycerine, diglycerine, propylene glycol, sorbitol, pentylene glycol, and polyethylene glycols, or alternatively C 2 ethers; and hydrophilic C2-C4 aldehydes.

  The water or the mixture of water and hydrophilic organic solvents may be present in the composition according to the invention in a content ranging from 0.1% to 99% by weight, relative to the total weight of the composition, and from preferably from 10% to 80% by weight.

  The composition may also be anhydrous.

  The composition may also comprise a fatty phase which may comprise fatty substances that are liquid at room temperature (generally 25 ° C.) and / or fatty substances that are solid at room temperature, such as waxes, pasty fatty substances, gums and mixtures thereof. These fats can be of animal, vegetable, mineral or synthetic origin. This fatty phase may, in addition, contain lipophilic organic solvents.

  As liquid fatty substances at room temperature, often called oils, which can be used in the invention, mention may be made of: hydrocarbon-based oils of animal origin, such as perhydrosqualene; vegetable hydrocarbon oils such as liquid triglycerides of fatty acids of 4 to 10 carbon atoms such as triglycerides of heptanoic or octanoic acids, or sunflower, corn, soybean, grapeseed, sesame, apricot, macadamia, castor oil, avocado, triglycerides of caprylic-capric acids, jojoba oil, shea butter; linear or branched hydrocarbons of mineral or synthetic origin, such as paraffin oils and their derivatives, petroleum jelly, polybutenes, hydrogenated polyisobutene such as parleam; esters and synthetic ethers, in particular of fatty acids, for example purcellin oil, isopropyl myristate, 2-ethylhexyl palmitate, octyl-2-dodecyl stearate, erucate octyl-2-dodecyl, isostearyl isostearate; hydroxylated esters such as isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, heptanoates, octanoates, decanoates of fatty alcohols; polyol esters such as propylene glycol dioctanoate, neopentyl glycol diheptanoate, diethylene glycol diisononanoate; and pentaerythritol esters; fatty alcohols having 12 to 26 carbon atoms such as octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleyl alcohol; partially hydrocarbon and / or silicone fluorinated oils; silicone oils, such as volatile or nonvolatile polymethylsiloxanes (PDMS), linear or cyclic, liquid or pasty at room temperature, such as cyclomethicones, dimethicones, optionally containing a phenyl group, such as phenyl trimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenylmethyldimethylamines; trisiloxanes, diphenyl dimethicones, phenyl dimethicones, polymethylphenyl siloxanes; their mixtures.

  These oils may be present in a content ranging from 0.01 to 90%, and better still from 0.1 to 85% by weight, relative to the total weight of the composition.

  The composition according to the invention may also comprise one or more physiologically acceptable organic solvents.

  These solvents may be generally present in a content ranging from 0.1 to 90%, preferably from 0.5 to 85%, more preferably from 10 to 80% by weight, relative to the total weight of the composition, and better from 30 to 50%.

  In particular, in addition to the hydrophilic organic solvents mentioned above, ketones which are liquid at room temperature, such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone or acetone, may be mentioned; propylene glycol ethers which are liquid at ambient temperature, such as propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate or dipropylene glycol mono-butyl ether; short chain esters (having from 3 to 8 carbon atoms in total) such as ethyl acetate, methyl acetate, propyl acetate, n-butyl acetate, isopentyl; ethers which are liquid at 25 ° C., such as diethyl ether, dimethyl ether or dichlorodiethyl ether; al-canes liquid at 25 C such as decane, heptane, dodecane, isododecane, cyclohexane; C aromatic liquid aromatic compounds such as toluene and xylene; 25 C liquid aldehydes such as benzaldehyde, acetaldehyde and mixtures thereof.

  For the purposes of the present invention, the term "wax" means a lipophilic compound, solid at room temperature (25 ° C.), with reversible solid / liquid state change, having a melting point greater than or equal to 25 ° C. and up to 25 ° C. C. By bringing the wax to the liquid state (fusion), it is possible to render it miscible with the oils possibly present and to form a homogeneous mixture microscopically, but by bringing the temperature of the mixture to room temperature, a recrystallization of the wax in the oils of the mixture. The melting point of the wax can be measured using a differential scanning calorimeter (D.S.C.), for example the calorimeter sold under the name DSC 30 by the company METTLER.

  The waxes may be hydrocarbon-based, fluorinated and / or silicone-based and may be of vegetable, mineral, animal and / or synthetic origin. In particular, the waxes have a melting point of greater than 30 ° C. and better still greater than 45 ° C. As wax which can be used in the composition of the invention, mention may be made of beeswax, carnauba or candelilla wax, paraffin, microcrystalline waxes, ceresin or ozokerite; synthetic waxes such as polyethylene or Fischer Tropsch waxes, silicone waxes such as alkyl or alkoxydimetone having from 16 to 45 carbon atoms.

  The gums are generally high molecular weight polydimethylsiloxanes (PDMS) or cellulose gums or polysaccharides and the pasty substances are generally hydrocarbon compounds such as lanolines and their derivatives or else PDMSs.

  The nature and quantity of the solid bodies depend on the mechanical properties and textures sought. As an indication, the composition may contain from 0.1 to 50% by weight of waxes, relative to the total weight of the composition and better still from 1 to 30% by weight.

  The composition according to the invention may further comprise, in a particulate phase, pigments and / or nacres and / or fillers usually used in cosmetic compositions.

  The composition may also comprise other dyestuffs chosen from water-soluble dyes and / or liposoluble dyes well known to those skilled in the art.

  By pigments, it is necessary to include particles of any shape, white or colored, mineral or organic, insoluble in the physiological medium, intended to color the composition.

  3o By charges, it is necessary to include colorless or white particles, inorganic or synthetic, lamellar or non-lamellar, intended to give the body or rigidity to the composition, and / or softness, dullness and uniformity to makeup.

  By nacres, it is necessary to understand particles of any iridescent form, in particular produced by certain molluscs in their shell or else synthesized.

  The pigments may be present in the composition in a proportion of 0.01 to 25% by weight of the final composition, and preferably in a proportion of 3 to 10% by weight. They can be white or colored, mineral or organic ,. There may be mentioned oxides of titanium, zirconium or cerium, as well as oxides of zinc, iron or chromium, ferric blue, chromium hydrate, carbon black, overseas (polysulphides). aluminosilicates), manganese pyrophosphate and some metal powders such as silver or aluminum. Mention may also be made of D & C pigments and lacquers commonly used to give the lips and the skin a make-up effect, which are salts of calcium, barium, aluminum, strontium or zirconium.

  The nacres may be present in the composition in a proportion of 0.01 to 20% by weight, preferably at a rate of the order of 3 to 10% by weight. Among the nacres that can be envisaged, mention may be made of natural mother-of-pearl, mica coated with titanium oxide, with iron oxide, with natural pigment or with bismuth oxychloride, and with colored titanium mica.

  Among the dyes, liposoluble or water-soluble, which may be present in the composition, alone or as a mixture, in a proportion of 0.001 to 15% by weight, preferably 0.01 to 5% by weight and especially 0.1 to 2% by weight, relative to the total weight of the composition, mention may be made of the disodium salt of culvert, the di-sodium salt of alizarin green, quinoline yellow, the trisodium salt of amaranth, the disodium salt of tartrazine, monosodium rhodamine salt, disodium fuchsin salt, xanthophyll, methylene blue, cochineal carmine, haloacid, azo, anthraquinone dyes, copper or iron sulphate, Sudan brown, Sudan red and annatto, as well as beet juice and carotene.

  The composition according to the invention may also comprise, in addition, one or more fillers, in particular in a content ranging from 0.01% to 50% by weight, relative to the total weight of the composition, preferably ranging from 02% to 30% by weight. The fillers can be mineral or organic of any shape, platelet, spherical or oblong. Mention may be made of talc, mica, silica, kaolin, polyamide (nylon), poly-β-alanine and polyethylene powders, tetrafluoroethylene (Teflon) polymer powders, lauroyl-lysine, starch, boron nitride, polymeric hollow microspheres such as those of polyvinylidene chloride / acrylonitrile such as Expancel (Nobel Industry), acrylic acid copolymers (Polytrap from Dow Corning) and silicone resin microbeads (Toshiba Tospearls, for example), elastomeric polyorganosiloxane particles, precipitated calcium carbonate, magnesium carbonate and hydrocarbonate, hydroxyapatite, hollow silica microspheres (Silica Beads of Maprecos), glass microcapsules or ceramic, 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 um or lithium, zinc laurate, magnesium myristate.

  The composition may further comprise an additional polymer such as a film-forming polymer. According to the present invention, the term "film-forming polymer" means a polymer capable of forming on its own or in the presence of an auxiliary filtering agent, a continuous and adherent film on a support, in particular on keratin materials. Among the film-forming polymers that may be used in the composition of the present invention, mention may be made of synthetic polymers, of radical type or of polycondensate type, polymers of natural origin and their mixtures, in particular acrylic polymers, polyurethanes , polyesters, polyamides, polyureas, cellulosic polymers such as nitrocellulose.

  The composition according to the invention may also comprise ingredients commonly used in cosmetics, such as vitamins, thickeners, gelling agents, trace elements, softeners, sequestering agents, perfumes, alkalizing or acidifying agents, preservatives, sunscreens, surfactants, cosmetic active agents, moisturizers, anti-oxidants, anti-hair loss agents, anti-dandruff agents, propellants, ceramides, or mixtures thereof. Of course, those skilled in the art will take care to choose this or these optional additional compounds, and / or their quantity, in such a way that the advantageous properties of the composition according to the invention are not, or not substantially, impaired by the addition envisaged. In particular, those skilled in the art will preferably ensure, when the composition comprises a fatty phase which comprises organic liquid compounds other than those present in the dispersion medium, that these other compounds are chosen so that the polymer ethylenic remains in the state of dispersion in said fatty phase.

  The compositions according to the invention may be in any acceptable and customary form for a cosmetic, hygienic or pharmaceutical composition, and especially in the form of a suspension, dispersion, solution, gel or emulsion, in particular an oil-in-oil emulsion. water (W / O) or water-in-oil (W / O), or multiple (W / O / E or polyol / H / E or H / E / H), in the form of cream, paste, foam , dispersion of vesicles including ionic lipids or not, biphase lotion or multiphase, spray, powder, paste. The composition may be anhydrous, for example it may be a stick or an anhydrous paste.

  Those skilled in the art may choose the appropriate dosage form, as well as its method of preparation, on the basis of its general knowledge, taking into account, on the one hand, the nature of the constituents used, in particular their solubility in the support. and on the other hand the application envisaged for the composition.

  The in particular cosmetic composition according to the invention can be in the form of a product for the care, cleaning and / or make-up of the skin of the body or of the face, the lips, the nails, the eyelashes, the eyebrows and / or hair, a sunscreen or self-tanning product, a hair product for the care, treatment, shaping, makeup or hair coloring.

  It can thus be in the form of a makeup composition, especially a product for the complexion such as a foundation, a blush or eyeshadow; a lip product such as a lipstick or a lip care; a concealer product; a blush, a mascara, an eyeliner; an eyebrow makeup product, a lip pencil or an eye pencil; nail product such as nail polish or nail care; a body make-up product; a hair make-up product (mascara or hairspray).

  It may also be in the form of a composition for protecting or caring for the skin of the face, neck, hands or body, in particular an anti-wrinkle composition, a moisturizing or treating composition; a solar composition (anti-UV) or artificial tanning.

  It may also be in the form of a hair product, especially for coloring, maintaining the hairstyle, shaping the hair, care, treatment or cleaning of the hair, such as shampoos, gels, styling lotions, blow-drying lotions, fixing and styling compositions such as lacquers or spray.

  The present invention also relates to a cosmetic treatment method for the care, cleaning and / or makeup of keratin materials such as the skin, the scalp, the eyelashes, the eyebrows, the hair, the lips, nails, comprising the application on said keratin materials, of a cosmetic composition as defined above.

  The invention is further illustrated by the following examples.

  Measurement methods In the present application and in the examples, the average molecular weight masses (Mw) and the number (Mn) of the polymer, and the solids content (or solids content), are determined after preparation of said dispersion. ) of the dispersion.

  The weight average molar masses (Mw) and number (Mn) are determined by gel permeation liquid chromatography (solvent THF, calibration curve established with linear polystyrene standards, refractometric detector and UV).

  The level of dry matter (or dry extract), ie the content of non-volatile matter, can be measured in different ways: for example, oven drying methods or exposure drying methods can be mentioned. to infrared radiation.

  Preferably, the solids content is measured by heating the sample with infrared rays of 2 μm to 3.5 μm wavelength. The substances in the composition which have a high vapor pressure evaporate under the effect of this radiation. The measurement of the loss of weight of the sample makes it possible to determine the dry extract of the composition. These measurements are carried out using a Mettler LP16 commercial infrared desiccator. This technique is perfectly described in the documentation of the device supplied by Mettler.

  The measurement protocol is as follows: about 1 g of the composition is spread on a metal cup. This, after introduction into the desiccator, is subjected to a temperature of 120 C for one hour. The wet mass of the sample, corresponding to the initial mass and the dry mass of the sample, corresponding to the mass after exposure to radiation, are measured using a precision balance.

  The solids content is calculated as follows: Dry extract = 100 x (dry mass / wet mass).

Example 1

1 / first step H, NOH cl

OH and

  In a 2-liter flask, under an inert atmosphere (argon), there are 55.4 g (0.23 mol) of 4-chloro-1,8-naphthalic anhydride, then 750 ml of toluene are added. Mix at 500 rpm. for a few minutes, then it is heated to 90 ° C., and 24.6 g (0.24 mol) of penta-1-olamine pre-dissolved in 150 ml of toluene are introduced dropwise. . The mixture is heated under reflux and then 50 ml of NMP are added. Reflux heating is continued for 16 hours. The resulting reaction mixture is then allowed to cool to room temperature. The product is concentrated under reduced pressure and the product is precipitated. The precipitate is washed twice with 75 ml of dilute HCl and then with 200 ml of water. The organic phase is recovered and dried under reduced pressure. 69.3 g of product are obtained (yield 91.7%) Characterization 1H-NMR (CDCl3, 400MHz) 8: 8.63-8.61 (1H), 8.57-8.55 (1H), 8.47-8.45 (1H) , 7.84-30 7.83 (2H), 4.19-4.15 (2H), 3.67-3.64 (2H), 1.79-1.64 (5H), 1.75-1, 49 (2H).

  2 / second step o Cl \ \ + HOC CO ô \ \

OH

OH

  150 ml of ethanol are placed in a three-necked one-liter flask under an inert atmosphere of argon; 2.6 g of sodium hydrate (NaH) are added and the mixture is stirred at room temperature for 30 minutes. 19.2 g (0.061 mol) of N- (pentan-5-yl) -4-chloro-1,8-naphthalimide premixed with 150 ml of ethanol are added and the mixture is vigorously mixed. The mixture is heated at 50 ° C. for 16 hours and then 30 ml of water are added. The solvent is evaporated under reduced pressure to give a residue which is dissolved in dichloromethane. The resulting solution is washed with sodium chloride solution, then with water, dried over sodium sulfate and filtered; the organic phase is evaporated off under reduced pressure and 19.3 g of yellow crystals are obtained (yield 97.1%).

  Characterization 1H-NMR (CDCl3, 400MHz) δ: 8.54-8.47 (3H), 7.67-7.65 (1H), 6.98-6.96 (1H), 4.34-4.29 (2H), 4.17-4.14 (2H), 3.66-3.65 (2H), 1.78-1.72 (3H), 1.67-1.57 (5H), 1.51-1.47 (2H).

3 / Third step

HO + cl

O

  18.0 g (54.8 mmol) of 4-ethoxy-N- (pentan-5-ol) -1,8-naphthalimide are placed in a three-necked flask equipped with a condenser and placed under an inert atmosphere of argon. 150 ml of dichloromethane are added and the solution is stirred until a homogeneous solution is obtained. 26.1 ml (187.5 mmol) of triethanolamine and then 5.7 g (62.5 mmol) of acryloyl chloride in 20 ml of dichloromethane are then added, with stirring at 15 ° C. The evolution of the reaction by TLC (thin layer chromatography), and when there are no more starting compounds (about 16 hours), 30 ml of water are added. The reaction solution is then evaporated to dryness and then taken up in dichloromethane. The organic phase is washed with saturated sodium bicarbonate solution, then with water and dried over sodium sulfate. The solvents are evaporated under reduced pressure and 20.2 g of a pale yellow powder are obtained (yield 96.6%).

  1H-NMR Characterization (CDCl3, 400MHz) 8: 8.56-8.53 (2H), 8.53-8.51 (1H), 7.70-7.69 (1H), 7.02-7.00 (1H), 6.40-6.35 (1H), 6.16-6.06 ( 1H), 5.79-5.77 (1H), 4.36-4.31 (2H), 4.19-4.17 (4H), 1.79-1.71 (4H), 1.62-1.60 (3H), 1.58-1.55 (2H).

Example 2

  1 / first step similar to the first step of Example 1 2871468 2 / second stage GNH2

HO

O

  In a 1 liter three-necked flask under an inert atmosphere (argon), 15.0 g (0.047 mol) of 4-chloro-N- (pentan-5-ol) -1,8-naphthalimide are added, and then 50 ml (46.4 g, 0.365 mol) of cyclooctylamine. The mixture is heated to 140 ° C. and mixed until the solution becomes homogeneous. Then allowed to react for 18 hours. The resulting reaction mixture is then allowed to cool to room temperature, and the residual cyclooctylamine is removed by distillation under reduced pressure. The residue is taken up in 175 ml of dichloromethane, washed with a dilute solution of HCl, with water and then with sodium bicarbonate solution. The organic phase is dried over sodium sulphate and filtered and then dried under reduced pressure.

  17.4 g of yellow-orange powder are obtained (yield 90.7%).

  Characterization 1H-NMR (CDCl3, 400MHz) δ: 8.57-8.55 (1H), 8.45-8.43 (1H), 8.06-8.04 (1H), 7.61-7.57 (1H), 6.66 -6.64 (1H), 5.23-5.21 (1H), 4.20-4.17 (2H), 3.84-3.82 (1H), 3.67- 3.65 (2H) ), 2.06-2.00 (2H), 1.85-1.45 (19H).

3 / third step

CI 33 HO

NH

OH

NH

NH

  In a 1-liter flask, under an inert atmosphere (argon), 19.0 g (0.046 mol) of N- (pentan-5-ol) -4-aminocyclooctyl-1,8-naphthalimide are added, and then 150 ml of dichloromethane (DCM). The mixture is stirred until a homogeneous solution. 15.6 g (0.14 mol) of triethanolamine are then introduced. With stirring (500 rpm) and at 25 ° C., a mixture of 4.2 g (0.049 mol) of acryloyl chloride in 20 ml of DCM is introduced dropwise. Another 80 ml of DCM are added. Allowed to react 20 hours, then 50 ml of water. The organic phase is washed with water and with sodium bicarbonate, then again with water. The organic phase is dried over sodium sulphate and filtered. The organic phase is evaporated and 21.5 g of orange-yellow product (yield: quantitative) are recovered.

  Characterization 1H-NMR (CDCl3, 400MHz) 8 ppm: 8.56-8.54 (1H), 8.45-8.42 (1H), 8.07-8.05 (1H), 7.60-7 , 58 (1H), 6.65-6.63 (1H), 6.39-6.34 (1H), 6.13-6.06 (1H), 5.80-5.77 (1H), 5.29-5.24 (1H), 4.18-4.13 (4H), 3.84-3.82 (1H), 2.02-1.99 (2H), 1.80-1, 48 (18H)

Example 3

  This example illustrates the preparation of a polymer forming a dispersion of particles in a hydrocarbon solvent (isododecane), said polymer being obtained by polymerization of methyl acrylate, the monomer of Example 2 and the macromonomer corresponding to a polyethylene / polybutylene copolymer (Kraton L-1253) of Mw = 4000.

  In a 250 ml reactor, 4 g of polyethylene / polybutylene (Kraton L-1253) copolymer type macromonomer dissolved in 50 g of isododecane, 6 g of methyl acrylate, 35 g of heptane and 0.8 g are charged. tbutyl peroxy-2-ethylhexanoate (Trigonox 21S). The mixture is stirred and the reaction mixture is heated to 90 ° C. After 15 minutes at 90 ° C., a change in appearance of the reaction medium is observed, which changes from a transparent appearance to a milky white appearance. The following two mixtures are then added simultaneously over the course of 40 minutes: mixture 1: 38.5 g of methyl acrylate and 0.5 g of Trigonox 21S.

  mixture 2: 1.5 g of monomer prepared in Example 2 solubilized in 15 g of THF.

  The heating is then left for 5 hours at 90 ° C., then the THF and heptane are distilled from the reaction medium, and 50 g of isododecane are added.

  At the end of this distillation operation, a yellow dispersion of polymer particles thus prepared stable in isododecane is obtained.

  The characteristics of the polymer and the particles formed by said polymer are as follows: Dry extract: 54.5% in isododecane, produced by thermobalance.

Mw = 38900 g / mol; Mn = 9900.

Example 4

  A lipstick stick having the following composition is prepared: Polyethylene wax 15% Polymer dispersion of Example 3 (at 54.5% DM) 10% Polyisobutene hydrogenated (Parléam de Nippon Oil Fats) 26% Pigments 8 Isododecane qs 100% The composition obtained after application to the lips has good cosmetic properties.

  EXAMPLE 5 Foundation Foundation E H A foundation composition comprising the following compounds is prepared: Phase A Cetyl dimethicone copolyol 3 g (ABIL EM 90 from GOLDSCHMIDT) Isostearyl diglyceryl succinate 0.6 g (IMWITOR 780K) from CONDEA) Isododecane 18.5 g Pigments (iron oxides of titanium) 10 g Polymer dispersion of Example 3 8.7 g in MSA Polyamide powder (NYLON-12) 8 g Scent qs Phase B Water qs 100 Magnesium sulphate 0.7 g Preservative qs The composition obtained has good cosmetic properties.

Claims (40)

  1. Dispersion, in a non-aqueous organic medium, of particularly solid particles consisting of at least one ethylenic polymer comprising an insoluble backbone in said medium, and a portion soluble in said medium consisting of side chains covalently bonded to said backbone said ethylenic polymer being capable of being obtained by radical polymerization of: at least one optically effective monomer of formula (I): (1) R2 X'R3 in which: the R2 and X'R3 groups are present; on the same cycle or each on a different cycle; - R2 and R3 represent, independently of one another, a hydrogen atom, a halogen or a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 30 carbon atoms; optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; X and X 'represent, independently of one another, -O-, -S-, -SO-, -SO2-, -NH- or -NR4- with R4 representing a linear, branched carbon radical and / or cyclic, saturated and / or unsaturated, comprising 1 to 30 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; - Pestégal to O or 1, - G is a divalent linear, branched and / or cyclic, saturated and / or unsaturated carbon radical, comprising 1 to 30 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, Si and S; P is a polymerizable group chosen from one of the following formulas: ## STR2 ## in which: R 'represents H or a linear hydrocarbon radical; or branched, saturated at C1-6, - is even at 0 or 1 and m is 0 or 1.   to form said insoluble skeleton; and at least one macromonomer comprising a polymerizable end group capable of forming the side chains.   2. Dispersion according to claim 1, wherein R2 is a hydrogen atom.   3. Dispersion according to one of the preceding claims, wherein, in the formula (I), R3 is a carbon radical, in particular hydrocarbon, cyclic, linear and / or branched, saturated and / or unsaturated, optionally comprising a hydrocarbon-based cycle. -same-saturated and / or unsaturated, comprising 2 to 18, in particular 3 to 14, or even 6 to 12, carbon atoms, and can comprise at least one heteroatom, in particular one, two or three nitrogen atoms, sulfur and / or or oxygen.   4. Dispersion according to one of the preceding claims, wherein R3 is n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, cyclopentyl, n-hexyl, cyclohexyl, n-heptyl, n octyl, cyclooctyl, decyl, cyclodecyl, dodecyl, cyclododecyl, pterbutylcyclohexyl, benzyl, phenyl.   5. Dispersion according to one of claims 1 to 3, wherein X'R3 is an NH- (CH2) nH radical; -O- (CH2) nH, for example ethoxy or methoxy; -S (CH2) nH, -SO- (CH2) nH or SO2- (CH2) nH with n being an integer between 1 and 30, especially between 4 and 12; or -NH-C6-C18-cycloalkyl, especially NH-cyclohexyl, NH-cyclooctyl, -NH-cyclodecyl, NHcyclododecyl; or else C 6 -C 18 S-cycloalkyl, -SO-C 6 -C 18 cycloalkyl or C 6 -C 18 SO 2 -cycloalkyl; or else a radical chosen from the following: ## STR2 ## H N H3 NH NH / S 1 CH3 CZHs S S I He O O O (0 1 0 O S- I O IoI NOT- -S   6. Dispersion according to one of the preceding claims, wherein G is a linear divalent hydrocarbon radical branched and / or cyclic, saturated or unsaturated, optionally comprising a hydrocarbon ring itself saturated or unsaturated, comprising in total 2 to 18, in particular 3 to 8 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si.   zo 7. Dispersion according to one of the preceding claims, wherein G is selected from saturated linear or branched divalent hydrocarbon radicals optionally comprising a saturated hydrocarbon ring, comprising in total 2 to 16, in particular 3 to 10 carbon atoms.   8. Dispersion according to one of the preceding claims, wherein the divalent radical X is selected from -O-, -S-, -NH- or -NR4-, preferentially 0; and the radical R4, when it is present, represents a linear, branched and / or cyclic hydrocarbon radical, saturated or unsaturated, comprising 2 to 12 carbon atoms, optionally substituted by one or more groups chosen from = 0, OH, NH2 .   9. Dispersion according to one of the preceding claims, wherein P is chosen from one of the following formulas: H R 'R'> - <H ") -C H C 0 i / O   in which R 'is H or methyl.   10. Dispersion according to one of the preceding claims, wherein the monomer of formula (I) is selected from the compounds corresponding to one of the following formulas: 0IOO 0XX H H 0 = S He O HN   11. Dispersion according to one of the preceding claims, wherein the monomer of formula (I), alone or in mixture, is present in a proportion of from 0.005 to 40% by weight, especially 0.01 to 20% by weight, even 0.1 to 10% by weight, and more preferably 0.5 to 5% by weight, relative to the weight of the final ethylenic polymer.   12. Dispersion according to one of the preceding claims, wherein the macromonomer comprises at the end of the chain a polymerizable terminal group which is a vinyl group, preferably an acrylate or methacrylate group.   13. Dispersion according to one of the preceding claims, wherein the macromonomer is selected from macromonomers whose homopolymers have a glass transition temperature (Tg) less than or equal to 25 C, in particular ranging from -100 C to 25 C, preferably ranging from -80 ° C to 0 ° C inclusive.   14. Dispersion according to one of the preceding claims, wherein the macromonomer has a weight average molecular weight (Mw) ranging from 200 to 100,000, preferably from 300 to 50,000, in particular 500 to 20,000, preferably from 800 to 10000 or even 1000 to 6000.   15. Dispersion according to one of the preceding claims, wherein the macromonomer is selected from non-silicone macromonomers, especially carbon, and silicone macromonomers, in particular organopolysiloxane, in particular polydimethylsiloxane.   16. Dispersion according to one of the preceding claims, wherein the macromonomer is selected from: - (i) homopolymers and copolymers of C6-C22 linear or branched alkyl (meth) acrylate, preferably C8-C18, having a polymerizable terminal group selected from vinyl or (meth) acrylate groups; and especially macromonomers of poly (2-ethylhexyl acrylate) end-monoacrylate or monomethacrylate; macromonomers of poly (dodecyl acrylate) or of poly (dodecyl methacrylate) with a monoacrylate or monomethacrylate end; macromonomers of poly (stearyl acrylate) or poly (stearyl methacrylate) with a monoacrylate or monomethacrylate end.   (ii) polyolefins having an ethylenically unsaturated terminal group of vinyl type or preferably having a (meth) acrylate end group; and in particular the following macromonomers, it being understood that they have a (meth) acrylate end group: polyethylene macromonomers, polypropylene macromonomers, polyethylene / polypropylene copolymer macromonomers, polyethylene / polybutylene copolymer macromonomers, polyisobutylene macromonomers ; polybutadiene macromonomers; polyisoprene macromonomers; poly (ethylene / butylene) - polyisoprene macromonomers; (iii) polydimethylsiloxanes with a mono (meth) acrylate end group, and in particular those of the following formula (IIa): embedded image CH n 3   in which: R8 denotes a hydrogen atom or a methyl group; preferably methyl; - R9 denotes a divalent hydrocarbon group, linear or branched, preferably linear, having from 1 to 10 carbon atoms and optionally containing one or two -O- ether bonds; preferably ethylene, propylene or butylene; R10 denotes a linear or branched alkyl group having from 1 to 10 carbon atoms, especially from 2 to 8 carbon atoms; preferably methyl, ethyl, propyl, butyl or pentyl; n denotes an integer ranging from 1 to 300, preferably ranging from 3 to 200, and preferably ranging from 5 to 100.   17. Dispersion according to one of the preceding claims, wherein the macromonomer, alone or in mixture, is present in the ethylenic polymer in a proportion of 0.5 to 20% by weight, especially 1 to 18% by weight, preferably from 2 to 16% by weight, and especially from 4 to 15% by weight, among others from 6 to 13% by weight, or even 8 to 12% by weight, relative to the total weight of said polymer.   18. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one compound selected from: - non-aqueous non-silicone liquid compounds having an overall solubility parameter according to Hansen solubility space less than or equal to (MPa) 1/2, preferably less than or equal to 18 (MPa) 1/2, more preferably less than or equal to 17 (MPa) 112 - monoalcohols having an overall solubility parameter according to Hansen's solubility space less than or equal to 20 (MPa) 112; the non-aqueous silicone liquid compounds having an overall solubility parameter according to the Hansen solubility space less than or equal to 20 (MPa) 1/2, preferably less than or equal to 17 (MPa) 1'2 - their mixtures.   19. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one non-volatile oil selected from: non-volatile oils, non-silicone, especially hydrocarbon, such as liquid paraffin (or petroleum jelly), squalane hydrogenated polyisobutylene (Parléam oil), perhydrosqualene, mink, turtle, soybean oil, sweet almond oil, calophyllum oil, palm oil, grape seed oil, sesame oil, corn oil, arara, rapeseed, sunflower, cotton, apricot, castor oil, avocado, jojoba, olive or cereal sprouts; esters of lanolic acid, oleic acid, lauric acid, stearic acid; esters derived from acids or long-chain alcohols (that is to say having from 6 to 20 carbon atoms), in particular the RCOOR '-formula esters in which R represents the residue of an acid 7 to 19 carbon atoms and R 'represents a hydrocarbon chain comprising from 3 to 20 carbon atoms, in particular the C 12 -C 36 esters, such as isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-hexyl-decyl laurate, 2-octyl-decyl palmitate, myristate or 2-octyldodecyl lactate, di (2-ethyl hexyl) succinate, diisostearyl malate, glycerin or diglycerine triisostearate; higher fatty acids, especially C14-C22, such as myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid or isostearic acid; higher fatty alcohols, especially C16-C22, such as cetanol, oleic alcohol, linoleic or linolenic alcohol, isostearyl alcohol or octyl dodecanol; and their mixtures.   20. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one volatile oil selected from non-silicone volatile oils, including isoparaffins C8-O16 such as isododecane, isodecane, isohexadecane.   21. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one compound selected from: - linear esters, branched or cyclic, having more than 6 carbon atoms, especially 6 to 30 carbon atoms, - ethers having more than 6 carbon atoms, especially 6 to 30 carbon atoms; and ketones having more than 6 carbon atoms, especially 6 to 30 carbon atoms.   - Linear alkanes, branched and / or cyclic optionally volatile and in particular paraffin oils, petroleum jelly, or hydrogenated polyisobutylene.   aliphatic fatty alcohols having 6 to 30 carbon atoms, the hydrocarbon chain having no substitution group, such as oleic alcohol, decanol, dodecanol, octadecanol and linoleic alcohol.   22. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one nonvolatile silicone oil selected from: non-volatile polydialkylsiloxanes, such as non-volatile polydimethylsiloxanes (PDMS); polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, during or at the end of the silicone chain, groups having from 2 to 24 carbon atoms; phenyl silicones such as phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, polymethylphenylsiloxanes; polysiloxanes modified with fatty acids (especially C8-C20), with fatty alcohols (especially C8-C20) and / or with polyoxyalkylenes (especially polyoxyethylene and / or polyoxypropylene); aminated polysiloxanes; polysiloxanes containing hydroxyl groups; fluorinated polysiloxanes comprising a fluorinated group during or at the end of the silicone chain having from 1 to 12 carbon atoms all or part of the hydrogen atoms of which are substituted by fluorine atoms; and their mixtures.   23. Dispersion according to one of the preceding claims, wherein the organic medium comprises at least one volatile silicone oil selected from: linear or cyclic silicones having from 2 to 7 silicon atoms, these silicones optionally containing alkyl groups or alkoxy having 1 to 10 carbon atoms, and in particular octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and mixtures thereof.   24. Dispersion according to one of the preceding claims, wherein the ethylenic polymer is obtainable by radical polymerization: - at least one optical effect monomer of formula (I) mixed with at least one additional ethylenic monomer to form said insoluble skeleton; and at least one macromonomer comprising a polymerizable end group capable of forming the side chains.   25. Dispersion according to claim 24, in which the additional ethylenic monomer, alone or as a mixture, is present in a proportion of 40 to 99.495% by weight, in particular 50-98% by weight, or even 60 to 95% by weight, of preferably 75 to 92% by weight, or even 80 to 90% by weight, relative to the weight of the final ethylenic polymer.   26. Dispersion according to one of claims 24 to 25, wherein the additional ethylenic monomer comprises at least one monomer (meth) acrylic, which alone or in mixture, preferably represents 60 to 100% by weight, especially 75 to 99, 5% by weight, or even 85 to 99% by weight, of the total weight of additional ethylenic monomers, the optional complement to 100% consisting of non-(meth) acrylic ethylenic monomers, alone or as a mixture.   27. Dispersion according to claim 26, wherein the (meth) acrylic monomer is chosen from, alone or as a mixture, the following monomers, and their salts: - (i) (meth) acrylates of formula CH2 = CHCOOR'3 or CH2 = C (CH3) COOR'3 in which R'3 represents: a linear or branched alkyl group comprising 1 to 18 carbon atoms, in which is optionally interspersed one or more selected heteroatoms; of O, N, S and P and / or said alkyl group may be optionally substituted by one or more substituents selected from OH, halogen atoms (Cl, Br, I and F), -NR4R5 groups, where R. 4 and R5, which may be identical or different, represent hydrogen or a linear or branched C1-C6 alkyl group or a phenyl group; and / or polyoxyalkylene groups, especially polyoxyethylene and / or polyoxypropylene groups, said polyoxyalkylene group consisting of the repetition of 5 to 30 oxyalkylene units; a C 3 to C 12 cycloalkyl group, said cycloalkyl group possibly comprising in its chain one or more heteroatoms chosen from O, N, S and / or P, and / or which may be optionally substituted by one or more substituents chosen from OH and the halogen atoms (Cl, Br, I and F); a C3 to C20 aryl or C4 to C30 aralkyl group (C1 to C6 alkyl group), especially R'3 may be a methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, hexyl or ethylhexyl group; octyl, lauryl, isooctyl, isodecyl, dodecyl, cyclohexyl, t-butylcyclohexyl, stearyl, ethyl-2-perfluorohexyl, 2-hydroxyethyl, 2-hydroxybutyl, 2-hydroxypropyl, methoxyethyl, ethoxyethyl, methoxypropyl, isobornyl, phenyl, 2-phenyl- ethyl, t-butylbenzyl, benzyl, furfurylmethyl or tetrahydrofurfurylmethyl, methoxypolyoxyethylene (or POE-methyl), POE-behenyl, trifluoroethyl, dimethylaminoethyl, diethylaminoethyl, dimethylaminopropyl.   (ii) (meth) acrylamides of formula CH2 = CHCONR'4R'5 or CH2 = C (CH3) CONR'4R'5 in which R'4 and R'5, which may be identical or different, represent an atom of hydrogen or: a) a linear or branched alkyl group having from 1 to 18 carbon atoms in which one or more heteroatoms chosen from O, N, S and P are optionally intercalated; said alkyl group may further be optionally substituted with one or more substituents selected from hydroxyl groups, halogen atoms (Cl, Br, I and F), and Si (R 4 R 5) groups, where R 4 and R 5 are the same or different represent a C 1 -C 6 alkyl group or a phenyl group; and especially a methyl, ethyl, propyl, n-butyl, isobutyl, tert-butyl, hexyl, ethylhexyl, octyl, lauryl, isooctyl, isodecyl, dodecyl, cyclohexyl, t-butylcyclohexyl or stearyl group; ethyl-2-perfluorohexyl; or a C1-4 hydroxyalkyl group such as 2-hydroxyethyl, 2-hydroxybutyl and 2-hydroxypropyl; or a (C1-4) alkoxy (C1-4) alkyl group such as methoxyethyl, ethoxyethyl and methoxypropyl, b) a C3-C12 cycloalkyl group, such as isobornyl group, or a heterocycloalkyl (alkyl group of 1 to 4 carbon atoms), such as furfurylmethyl or tetrahydrofurfurylmethyl, c) a C3-C20 aryl group such as phenyl, d) a C4-C30 aralkyl group (C1-C8 alkyl group) such as 2-phenyl-ethyl, t-butylbenzyl or benzyl, - (iii) ethylenically unsaturated (meth) acrylic monomers containing at least one carboxylic acid, phosphoric or sulphonic acid function, such as acrylic acid, methacrylic acid or acrylamidopropanesulfonic acid. , and their salts; 28. Dispersion according to one of Claims 26 to 27, in which the (meth) acrylic monomer is chosen from methyl, ethyl, n-propyl, isopropyl, butyl and methyl (meth) acrylates. isobutyl; methoxyethyl or ethoxyethyl (meth) acrylates; trifluoroethyl (meth) acrylate; dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, acrylic acid, methacrylic acid, (meth) acrylamide, N-ethyl (meth) acrylamide, N-butyl (meth) acrylamide, Nt-butyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-dibutyl (meth) acrylamide, N-octyl (meth) acrylamide, N-dodecyl (meth) acrylamide, undecyl (meth) acrylamide, N (2-hydroxypropyl) (meth) acrylamide, dimethylaminopropyl (meth) ) acrylamide) and their salts; and their mixtures 29. Dispersion according to one of claims 26 to 27, wherein the (meth) acrylic monomer is selected from methyl acrylate, methyl methacrylate, acrylic acid and methacrylic acid, and mixtures thereof.   30. Dispersion according to one of claims 24 to 29, wherein the additional ethylenic monomer is selected from: - vinyl esters of formula: R6-COO-CH = CH2 wherein R6 represents a linear or branched alkyl group, comprising from 1 to 6 atoms, or a cyclic alkyl group having from 3 to 6 carbon atoms and / or an aromatic group, for example of the benzene, anthracene, and naphthalenic type; ethylenic hydrocarbons having 2 to 10 carbons, such as ethylene, isoprene or butadiene; ethylenically unsaturated monomers containing at least one carboxylic, phosphoric or sulphonic acid or anhydride function, for example crotonic acid, maleic anhydride, itaconic acid or fumaric acid, maleic acid, styrenesulfonic acid, vinylbenzoic acid, vinylphosphoric acid and salts thereof; ethylenically unsaturated monomers comprising at least one tertiary amine function such as 2-vinylpyridine or 4-vinylpyridine; the vinyl compounds of formulas: CH2 = CH-R9, CH2 = CH-CH2-R9 or CH2 = C (CH3) -CH2-R9 in which R9 is a hydroxyl, halogen (Cl or F), NH2, OR10 group; Rio represents a phenyl group or a C1-C12 alkyl group (the monomer is a vinyl or allyl ether); acetamide (NHCOCH3); an OCOR11 group where R11 represents a linear or branched alkyl group of 2 to 12 carbons (the monomer is a vinyl or allyl ester); or a group selected from: a linear or branched alkyl group of 1 to 18 carbon atoms, in which is (are) optionally intercalated one or more heteroatoms chosen from O, N, S and P; said alkyl group may further be optionally substituted with one or more substituents selected from hydroxyl groups, halogen atoms (Cl, Br, I and F), and Si (R4R5) groups, wherein R4 and R5 are the same or different represent a C1-C6 alkyl group or a phenyl group; a C 3 to C 12 cycloalkyl group such as isobornyl, cyclohexane, a C 3 to C 20 aryl group such as phenyl, a C 4 to C 30 aralkyl group (C 1 to C 8 alkyl group) such as 2-phenylethyl; benzyl, - a 4- to 12-membered heterocyclic group containing one or more heteroatoms selected from O, N, and S, the ring being aromatic or not, - a heterocycloalkyl (alkyl of 1 to 4 C), such as furfurylmethyl or tetrahydrofurfurylmethyl - and their salts and mixtures.   31. Dispersion according to one of claims 24 to 30, wherein the ethylenic monomer is selected from vinylcyclohexane, styrene, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl ethylhexanoate, vinyl neononanoate, vinyl neododecanoate, vinyl methyl ether, vinyl ethyl ether and vinyl isobutyl ether.   32. Dispersion according to one of claims 24 to 31, wherein the additional ethylenic monomer is selected from the optical effect monomers of formula (A) and / or (B) and / or (C) below, alone or in a mixture, Ra2, Ra3 Rat, Rai (A) (B) (C) in which: Rai represents a linear, branched and / or cyclic, saturated and / or unsaturated carbon radical containing 1 to 32 carbon atoms; optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; - Rbl is chosen from (i) a hydrogen atom, (ii) a halogen, (iii) a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 12 carbon atoms, optionally substituted by one or more groups chosen from = 0, OH, NH 2 and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, Si and S; (iv) a group NRR 'with R and R' being, independently of one another, a hydrogen atom or a hydrocarbon radical, linear, cyclic or branched, saturated C1-6, in particular methyl, ethyl, propyl isopropyl, n-butyl, isobutyl, tert-butyl, pentyl or hexyl; Ra2 and Ra3, present on the same ring or each on a different ring, represent, independently of one another, a hydrogen, a halogen, or a group of formula -Xa-Ga-Pa (II) provided that at least one of Ra2 and / or Ra3 represents a group of formula (II), wherein: Xa is selected from -O-, -S-, -SO-, -SO2 -, -NH- or -NR4- with R4 representing a linear, branched and / or cyclic, saturated and / or unsaturated carbon radical containing 1 to 30 carbon atoms, optionally substituted by one or more groups chosen from = 0, OH , NH2, and halogen atoms; and / or optionally interrupted by one or more heteroatoms selected from O, N, P, Si and S; Ga is a divalent linear, branched and / or cyclic, saturated and / or unsaturated divalent carbon radical comprising 1 to 32 carbon atoms, optionally substituted with one or more groups chosen from = 0, OH, NH 2, and the atoms of halogens; and / or optionally interrupted by one or more heteroatoms chosen from O, N, P, Si and S; Pa is a polymerizable group chosen from one of the following formulas: ## STR1 ## in which: (IIib) (II) (b) Illc) - R 'represents H or a hydrocarbon radical, linear or branched, C1-6 saturated, - X' represents O, NH or NR "with R" representing a radical chosen from C1-6 alkyl radicals, aryl radicals, C6-10, aryl (C6-10) alkyl (C1-6) or alkyl (C1-6) aryl (C6-10), the alkyl and / or aryl groups may be further substituted by one or more groups selected from OH halogen, C 1-6 alkoxy and C 6-10 aryloxy; and - m is 0 or 1; n is 0 or 1; p is 0, 1 or 2; B represents one of the following divalent aromatic groups (IVa) to (IVd): R1 (IVa) (IVb) (IVc) (IVd) in which: R1 is a linear, branched and / or cyclic carbon radical, saturated and / or unsaturated, comprising 1 to 32 carbon atoms, optionally substituted with one or more groups selected from = 0, OH, NH 2, and halogen atoms; - R20 and R21 are, independently of one another, a hydrogen atom, a linear or branched C1-8 alkyl radical, a cyclopentyl, cyclohexyl, cyclooctyl, cyclodecyl, cyclododecyl, benzyl, naphthyl or phenyl radical.   33. Dispersion according to one of the preceding claims, wherein the polyethylene ethylene has a weight average molecular weight (Mw) of between 10,000 and 500,000, in particular between 20000 and 300000, better still between 25000 and 200000. 000 or even between 30000 and 150000.   34. Dispersion according to one of the preceding claims, having a dry matter content (or solids content) polymer of 20% to 70% by weight of dry matter, especially 30 to 65% by weight, or even 40 to 60% by weight.   35. Cosmetic or pharmaceutical composition comprising, in a cosmetically or pharmaceutically acceptable medium, a dispersion according to one of the preceding claims.   36. Composition according to claim 35, in which the dispersion is present in a proportion of 3 to 95% by weight in the composition, in particular 4-90% by weight, or even 5-70% by weight, preferably 10 to 50% by weight. % in weight.   37. Composition according to one of claims 35 to 36, comprising at least one constituent chosen from: a hydrophilic medium comprising water or a mixture of water and hydrophilic organic solvent (s) such as alcohols and in particular lower linear or branched monohydric alcohols having from 2 to 5 carbon atoms, such as ethanol, isopropanol or n-propanol, and polyols such as glycerol, diglycerol, propylene glycol, sorbitol, pentylene glycol, and polyethylene glycols, or alternatively C 2 ethers and C 2 -C 4 aldehydes which are hydrophilic.   a fatty phase which may comprise fatty substances that are liquid at room temperature (generally 25 ° C.) and / or fatty substances that are solid at room temperature, such as waxes, pasty fatty substances, gums and their mixtures, organic solvents, lipophilic; a particulate phase which may comprise pigments and / or nacres and / or fillers; water-soluble dyes and / or fat-soluble dyes; additional polymers, in particular film-forming polymers; vitamins, thickeners, gelling agents, trace elements, softeners, sequestering agents, perfumes, alkalizing or acidifying agents, preservatives, sunscreens, surfactants, cosmetic active ingredients, hyalurisers, anti-oxidants, anti-hair loss agents, anti-dandruff agents, propellants, ceramides, or mixtures thereof.   38. Composition according to one of claims 35 to 37, in the form of a care product, cleaning and / or makeup of the skin of the body or face, lips, nails, eyelashes, eyebrows and / or hair, a suntan or self-tanning product, a hair product for the care, treatment, shaping, makeup or hair coloring.   39. Composition according to one of claims 35 to 38, in the form of a makeup composition, especially a complexion product such as a foundation, a blush or eyeshadow; a lip product such as a lipstick or a lip care; a concealer product; a blush, a mascara, an eyeliner; an eyebrow makeup product, a lip pencil or an eye pencil; nail product such as nail polish or nail care; a body make-up product; a hair makeup product; a composition for protecting or caring for the skin of the face, neck, hands or body, in particular an anti-wrinkle composition, a moisturizing or treating composition; a solar composition (anti-UV) or artificial tanning; a hair product, especially for coloring, maintaining the hairstyle, shaping the hair, care, treatment or cleaning of the hair, such as shampoos, gels, styling lotions, blow-dry lotions, fixing and styling compositions such as lacquers or spray.   40. Cosmetic treatment method for the care, cleaning and / or makeup of keratin materials such as the skin of the body or face, the scalp, the eyelashes, the eyebrows, the hair, the lips, the nails, comprising the application to said keratin materials of a cosmetic composition as defined in one of claims 35 to 39.