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A physiologically acceptable composition, especially a cosmetic composition, comprising a liquid fatty phase comprising at least one silicone oil, structured with at least one polymer chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising

A physiologically acceptable composition, especially a cosmetic composition, comprising a liquid fatty phase comprising at least one silicone oil, structured with at least one polymer chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising at least one moiety comprising: at least one polyorganosiloxane group comprising from 1 to 1 000 organosiloxane units in the chain of the moiety of in the form of a graft, and at least two groups capable of establishing hydrogen interactions, the polymer being solid at room temperature and soluble in the liquid fatty phase at a temperature of from 25 to 250째 C., and solid particles having a hydrophobic surface.

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What is claimed is: 1. A composition comprising a liquid fatty phase comprising at least one silicone oil, structured with a combination comprising: 1) at least one gelling agent chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising at

What is claimed is: 1. A composition comprising a liquid fatty phase comprising at least one silicone oil, structured with a combination comprising: 1) at least one gelling agent chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising at least one moiety comprising: at least one polyorganosiloxane group comprising from 1 to 1 000 organosiloxane units in the chain of the moiety or in the form of a graft, and at least two groups capable of establishing hydrogen interactions, chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea, thiourea, oxamido, guanidino and biguanidino groups, and combinations thereof, on condition that at least one of the groups is other than an ester group, the at least one gelling agent being solid at room temperature and soluble in the liquid fatty phase at a temperature of from 25 to 250째 C., and 2) solid particles having a hydrophobic surface, the liquid fatty phase, the at least one gelling agent, and the solid particles forming a physiologically acceptable medium, wherein the solid particles are selected from the group consisting of powders of copolymer of tetrafluoroethylene and of ethylene, powders of copolymer of tetrafluoroethylene and of propylene, polymethyl-silsesqioxane powders, particles of lauroyllysine, hydrophilic pigments and fillers grafted with a hydrophobic compound, and mixtures thereof. 2. A composition according to claim 1, wherein the solid particles are chosen from the powders of copolymer of tetrafluoroethylene and of ethylene and the powders of copolymer of tetrafluoroethylene and of propylene. 3. A composition according to claim 1, wherein the solid particles are polymethyl-silsesquioxane powders. 4. A composition according to claim 1, wherein the solid particles are chosen from particles of lauroyllysine. 5. A composition according to claim 1, wherein the solid particles are chosen from hydrophilic pigments and fillers, grafted with a hydrophobic compound. 6. A composition according to claim 5, wherein the hydrophilic pigments are chosen from zinc oxides, iron oxides and titanium oxides. 7. A composition according to claim 5, wherein the hydrophobic compound is a fluoro compound. 8. A composition according to claim 7, wherein the fluoro compound is chosen from perfluoroalkyl monoesters and diesters of phosphoric acid and salts thereof, perfluoropolyethers, perfluorocarboxylic and perfluorosulphonic acids, perfluoroalkyl phosphate salts of diethanolamine, and fluorosilicones. 9. A composition according to claim 5, wherein the hydrophobic compound is a silicon derivative. 10. A composition according to claim 9, wherein the silicon derivative is chosen from reactive silicones initially comprising hydrogenosilane groups, diorganosilanes, alkylalkoxysilanes, silanes comprising a glycidoxypropyl group, polyglycerolated silicones, and silicone-grafted acrylic copolymers and silicone-grafted-polyacrylic copolymers. 11. A composition according to claim 10, wherein the diorganosilanes are chosen from dimethylchlorosilanes. 12. A composition according to claim 5, wherein the hydrophobic compound is chosen from N-acylamino acids, fatty acids and salts thereof, lecithins, and ester oils. 13. A composition according to claim 1, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety corresponding to the formula: in which: 1) R1, R2, R3 and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon-based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 alkyl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the groups X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionally comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at lest one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and Al, and R5 is chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) the groups G, which may be identical or different, represent divalent groups chosen from: in which R6 is chosen from a hydrogen atom and linear and branched C1 to C20 alkyl groups, on condition that at least 50% of the groups R6 of the polymer represents a hydrogen atom and that at least two of the groups G of the polymer are a group other than: 6) n is an integer ranging from 2 to 500, and m is an integer ranging from 1 to 1 000. 14. A composition according to claim 13, wherein n is an integer ranging from 2 to 200. 15. A composition according to claim 13, wherein m is an integer ranging from 1 to 700. 16. A composition according to claim 15, wherein m is an integer ranging from 6 to 200. 17. A composition according to claim 13, wherein Y is chosen from: a) linear C1 to C20 alkylene groups, b) C30 to C50 branched alkylene groups optionally comprising rings and unconjugated unsaturations, c) C5-C6 cycloalkylene groups, d) phenylene groups optionally substituted with at least one C1 to C40 alkyl group, e) C1 to C20 alkylene groups comprising from 1 to 5 amide groups, f) C1 to C20 alkylene groups comprising at least one substituent chosen from hydroxyl, C3 to C8 cycloalkane, C1 to C3 hydroxyalkyl and C1 to C6 alkylamine groups, g) polyorganosiloxane chains of formula: in which R1, R2, R3, R4, T and m are as defined in formula (I) in claim 13, h) polyorganosiloxane chains of formula: in which R1, R2, R3, R4, T and m are as defined in formula (I) in claim 13. 18. A composition according to claim 1, wherein the at least one gelling agent comprises at least one moiety corresponding to formula (II): in which R1 and R3, which may be identical or different, are as defined below, R7 is chosen from a group as defined above for R 1 and R3, and a group of formula--X-G-R9 in which X and G are as defined below and R9 is chosen from a hydrogen atom and linear, branched and cyclic, saturated and unsaturated, C1 to C50 hydrocarbon-based groups optionally comprising in the chain at least one atom chosen from O, S and N, optionally substituted with at least one fluorine atom and/or at least one hydroxyl group, and a phenyl group optionally substituted with at least one C1 to C4 alkyl group, R8 represents a group of formula--X-G-R9 in which X, G and R9 are as defined above, m1 is an integer ranging from 1 to 998, and m2 is an integer ranging from 2 to 500, in which 1) R1 and R3, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated C1 to C40 hydrocarbon-based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups optionally substituted with at least one C1 to C4 alkyl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the groups X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionally comprising in the chain at least one atom chosen from oxygen and nitrogen: 3) the groups G, which may be identical or different, represent divalent grous chosen from: in which R6 is chosen from a hydrogen atom and linear and branched C1 to C20 alkyl groups, on condition that at least 50 % of the groups R6 of the polymer represents a hydrogen atom and that at least two of the groups G of the polymer are a group other than: 19. A composition according to claim 13, wherein the at least one gelling agent comprises at least one moiety chosen from formulae (III) and (IV): in which R1, R2, R3, R4, X, Y, m and n are as defined in claim 13. 20. A composition according to claim 13, wherein X and/or Y represent an alkylene group comprising in its alkylenc portion at least one group chosen from: 1째) 1 to 5 amide, urea and carbamate groups, 2째) C5 and C6 cycloalkyl groups, and 3째) a phenylene group optionally substituted with 1 to 3 identical or different C1 to C3 alkyl groups, and optionally substituted with at least one element chosen from: a hydroxyl group, C3 to C8 cycloalkyl groups, one to three C1 to C40 alkyl groups, a phenyl group optionally substituted with one to three C 1 to C3 alkyl groups, C1 to C3 hydroxyalkyl groups, and C1 to C6 aminoalkyl groups. 21. A composition according to claim 13, wherein Y represents: in which R5 represents a polyorganosiloxane chain and T represents a group of formula: in which a, b and c are, independently, integers ranging from 1 to 10, and R10 is chosen from a hydrogen atom and groups defined for R1, R2, R3 and R4 in claim 13. 22. A composition according to claim 13, wherein R1, R2, R3 and R4, which may be identical or different, are chosen from linear and branched C1 to C40 alkyl groups, polyorganosiloxane chains and a phenyl group optionally substituted with one to three groups chosen from methyl and ethyl groups. 23. A composition according to claim 22, wherein the linear and branched C1 to C40 alkyl groups are chosen from CH3, C2H5, n-C3H7 and isopropyl groups. 24. A composition according to claim 1, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which X1 and X2 , wich may be identical or different, have the meaning given for X below, n, Y and T as defined below R11 to R18 are groups chosen from the same group as R1 to R4 below, m1 and m2 are integers in the range from 1 to 1000, and p is an integer ranging from 2 to 500, in which 1) R1, R2, R3 and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500. 25. A composition according to claim 24, wherein: p is in the range from 1 to 25, R11 to R18 are methyl groups, T corresponds to one of the following formulae: in which R19 is chosen from a hydrogen atom and groups chosen from the groups defined for R1 to R4 in claim 13, and R20, R21 and R22 are chosen from linear and branched alkylene groups, m1 and m2 are in the range from 15 to 500, X1 and X2 represent--(CH2) 10--, and Y represents--CH2--. 26. A composition according to claim 25, wherein p is in the range from 1 to 7. 27. A composition according to claim 25, wherein T corresponds to the formula: wherein R20, R21 and R22 represent--CH2--CH2--. 28. A composition according to claim 25, wherein m1 and m2 are in the range from 15 to 45. 29. A composition according to claim 1, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety corresponding to the following formula: in which R1, R2, R3, R4, X, Y, m and n have the meanings given below, and U is chosen from--O--and--NH--, or Y is chosen from C5 to C12 cycloaliphatic and aromatic groups that may be substituted with a group chosen from C 1 to C15 alkyl groups and C5 to C10 aryl groups, or Y is chosen from linear and branched C1 to C40 alkylene radicals and C4 to C12 cycloalkylene radicals, or Y is chosen from polyurethane and polyurea blocks corresponding to the condensation of several diisocyanate molecules with at least one coupling agent of the diol or diamine type, corresponding to the formula: in which is a group chosen from the groups given above for Y, U is chosen from--O--and--NH--and B2 is chosen from: linear and branched C1 to C40 alkylene groups, which can optionally bear an ionizable group, and neutralizable and quaternizable tertiary amine groups, C5 to C12 cycloalkylene groups, optionally bearing alkyl substituents, alkylene groups, and diol radicals, phenylene groups that may optionally bear C1 to C3 alkyl substituents, and groups of formula: in which T is a hydrocarbon-based trivalent radical optionally comprising at least one hetero atom and R5 is chosen from polyorganosiloxane chains and linear and branched C1 to C50 alkyl chains, in which 1) R1, R2, R3, and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500, and m is an integer ranging from 1 to 1 000. 30. A composition according to claim 29, wherein Y, which is chosen from C5 to C12 cycloaliphatic and aromatic groups that may be substituted with a group chosen from C1 to C15 alkyl groups and C5 to C10 aryl groups, is a radical chosen from the methylene-4,4-biscyclohexyl radical, the radical derived from isophorone diisocyanate, 2,4-and 2,6-tolylenes, 1,5-naphthylene, p-phenylene and 4,4'-biphenylenemethane. 31. A composition according to claim 29, wherein the ionizable group is chosen from carboxylic acid and sulphonic acid groups. 32. A composition according to claim 29, wherein the alkyl substituents are chosen from one to three groups chosen from methyl and ethyl groups. 33. A composition according to claim 29, wherein the diol radicals are chosen from cyclohexanedimethanol. 34. A composition according to claim 29, wherein the at least one hetero atom is chosen from oxygen, sulphur and nitrogen. 35. A composition according to claim 1, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which R1, R2, R3, m1 and m2 have the meanings given below, U is chosen from O and NH, R23 is chosen from C1 to C40 alkylene groups, optionally comprising at least one hetero atom chosen from O and N, and a phenylene group, and R24 is chosen from linear, branched and cyclic, saturated and unsaturated C1 to C50 alkyl groups, and a phenyl group optionally substituted with one to three C1 to C 3 alkyl groups, 1) R1, R2, and R3, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) m1 and m2 are integers in the range from 1 to 1 000. 36. A composition according to claim 1, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which X1 and X2, which are identical or different, have the meaning given for X below, n, Y and T are as defined below, R11 to R18 are groups chosen from the same groups as R1 to R4 below, m1 and m2 are integers in the range from 1 to 1000, and p is an integer ranging from 2 to 500, 1) R1, R2, R3 and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500. 37. A composition according to claim 13, wherein the at least one gelling agent furthermore comprises a hydrocarbon-based moiety comprising two groups capable of establishing hydrogen interactions, chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea and thiourea groups. 38. A composition according to claim 37, wherein the at least one gelling agent is chosen from block copolymers and grafted copolymers. 39. A composition according to claim 1, wherein the at least one gelling agent represents from 0.5% to 80% relative to the total weight of the composition, and the solid particles with a hydrophobic surface represent from 0.1% to 90% relative to the total weight of the composition. 40. A composition according to claim 39, wherein the at least one gelling agent represents from 2% to 60% relative to the total weight of the composition. 41. A composition according to claim 40, wherein the at least one gelling agent represents from 5% to 40% relative to the total weight of the composition. 42. A composition according to claim 39, wherein the solid particles with a hydrophobic surface represent from 1% to 70% relative to the total weight of the composition. 43. A composition according to claim 42, wherein the solid particles with a hydrophobic surface represent from 2% to 50% relative to the total weight of the composition. 44. A composition according to claim 1, wherein the liquid fatty phase comprises at least 40% by weight of silicone oil. 45. A composition according to claim 44, wherein the liquid fatty phase comprises at least 50% by weight of silicone oil. 46. A composition according to claim 44, wherein the liquid fatty phase comprises a non-silicone oil. 47. A composition according to claim 1, wherein the liquid fatty phase represents from 5% to 99% of the total weight of the composition. 48. A composition according to claim 47, wherein the liquid fatty phase represents from 20% to 75% of the total weight of the composition. 49. A composition according to claim 1, wherein said composition constitutes a care and/or treatment and/or makeup composition for a keratin material. 50. A composition according to claim 1, wherein said composition further comprises at least one active agent chosen from cosmetic and dermatological active agents. 51. A composition according to claim 1, wherein said composition comprises at least one additive chosen from water, antioxidants, essential oils, preserving agents, fragrances, liposoluble polymers, liquid-fatty-phase gelling agents, waxes, gums, resins, surfactants, and additional cosmetic and dermatological active agents chosen from emollients, moisturizers, vitamins, liquid lanolin, essential fatty acids, lipophilic sunscreens and sunscreens that are soluble in polyols. 52. A composition according to claim 51, wherein the liposoluble polymers are chosen from hydrocarbon-based liposoluble polymers. 53. A composition according to claim 52, wherein the hydrocarbon-based liposoluble polymers are chosen from polyalkylenes and polyvinyl laurate. 54. A composition according to claim 1, wherein said composition is in the form of a transparent anhydrous rigid gel, or in the form of a transparent anhydrous stick. 55. A composition according to claim 1, wherein said composition is in the form of a mascara cake, an eyeliner, a foundation, a lipstick, a blusher, a deodorant product, a makeup-removing product, a makeup product for the body, an eyeshadow, a face powder or a concealer product. 56. A method of limiting the migration of a cosmetic composition or a physiologically acceptable composition, comprising including in said composition a sufficient amount of an anti-migration agent comprising a continuous liquid fatty phase comprising at least one silicone oil, structured with a sufficient amount of at least one polymer chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising at least one unit comprising: at least one polyorganosiloxane group comprising from 1 to 1 000 organosiloxafle units in the chain of the moiety or in the form of a graft, and at least two groups capable of establishing hydrogen interactions, chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea, thiourea, oxamido, guanidino and biguanidino groups, and combinations thereof, on condition that at least one of the groups is other than an ester group, the at least one polymer being solid at room temperature and soluble in the liquid fatty phase at a temperature of from 25 to 250째 C., and solid particles having a hydrophobic surface. 57. A method according to claim 56, wherein the composition has a hardness of from 20 to 900 gf. 58. A method according to claim 57, wherein the composition has a hardness of from 20 to 600 gf. 59. A cosmetic process for limiting the migration of a cosmetic composition, comprising including in said composition a sufficient amount of an anti-migration agent, comprising a liquid fatty phase comprising at least one silicone oil, structured with a sufficient amount of at least one polymer chosen from homopolymers and copolymers with a weight-average molecular mass ranging from 500 to 500 000, comprising at least one moiety comprising: at least one polyorganosiloxane group comprising from 1 to 1 000 organosiloxane units in the chain of the moiety or in the form of a graft, and at least two groups capable of establishing hydrogen interactions, chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea, thiourea, oxamido, guanidino and biguanidino groups, and combinations thereof, on condition that at least one of the groups is other than an ester group, the at least one polymer being solid at room temperature and soluble in the liquid fatty phase at a temperature of from 25 to 250째 C., and solid particles having a hydrophobic surface. 60. A composition according to claim 17, wherein the linear C1 to C20 alkylene groups are chosen from linear C1 to C10 alkylene groups. 61. The method according to claim 56, wherein the solid particles are chosen from fillers and pigments. 62. The method according to claim 56, wherein the solid particles are hydrophobic particles, in the form of powders or fibers, or hydrophobic or copolymers chosen from: 1째) fluoro polymers; 2째) silicone elastomers; 3째) polyolefins; 4째) polyalkyl methacrylates; 5째) polyamides; 6째) polystyrenes and polystyrene derivatives; 7째) polyesters; 8째) polyacrylics; and 9째) polyurethanes. 63. The method according to claim 62, wherein the fluoro polymers are chosen from polytetrafluoroethylene powders and powders of copolymer of tetrafluoroethylene and of olefin. 64. The method according to claim 56, wherein the solid particles are chosen from the powders of copolymer of tetrafluoroethylene and of ethylene and the powders of copolymer of tetrafluoroethylene and of propylene. 65. The method according to claim 56, wherein the solid particles are polymethyl-silsesquioxane powders. 66. The method according to claim 56, wherein the solid particles are polyethylene. 67. The method according to claim 56, wherein the solid particles are polymethyl methacrylates. 68. The method according to claim 56, wherein the solid particles are chosen from particles of lauroyllysine and particles of pigments that block out ultraviolet rays. 69. The method according to claim 56, wherein the solid particles are chosen from hydrophilic pigments and fillers, coated with a film of hydrophobic compound or grafted with a hydrophobic compound. 70. The method according to claim 56, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety corresponding to the formula: in which: 1) R1, R2, R3 and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon-based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 alkyl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the groups X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionally comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at lest one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and Al, and R5 is chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) the groups G, which may be identical or different, represent divalent groups chosen from: in which R6 is chosen from a hydrogen atom and linear and branched C1 to C20 alkyl groups, on condition that at least 50% of the groups R6 of the polymer represents a hydrogen atom and that at least two of the groups G of the polymer are a group other than: 6) n is an integer ranging from 2 to 500, and m is an integer ranging from 1 to 1 000. 71. The method according to claim 70, wherein n is an integer ranging from 2 to 200. 72. The method according to claim 70, wherein m is an integer ranging from 1 to 700. 73. The method according to claim 72, wherein m is an integer ranging from 6 to 200. 74. The method according to claim 70, wherein Y is chosen from: a) linear C1 to C20 alkylene groups, b) C30 to C50 branched alkylene groups optionally comprising rings and unconjugated unsaturations, c) C5-C6 cycloalkylene groups, d) phenylene groups optionally substituted with at least one C1 to C40 alkyl group, e) C1 to C20 alkylene groups comprising from 1 to 5 amide groups, f) C1 to C20 alkylene groups comprising at least one substituent chosen from hydroxyl, C3 to C8 cycloalkane, C1 to C3 hydroxyalkyl and C1 to C6 alkylamine groups, g) polyorganosiloxane chains of formula: in which R1, R2, R3, R4, T and m are as defined in formula (I) in claim 70. h) polyorganosiloxane chains of formula: in which R1, R2, R3, R4, T and m are as defined in fommla (I) in claim 70. 75. The method according to claim 56, wherein the at least one gelling agent comprises at least one moiety corresponding to formula (II): in which R1 and R3, which may be identical or different, are as defined below, R7 is chosen from a group as defined above for R 1 and R3, and a group of formula--X-G-R9 in which X and G are as defined below and R9 is chosen from a hydrogen atom and linear, branched and cyclic, saturated and unsaturated, C1 to C50 hydrocarbon-based groups optionally comprising in the chain at least one atom chosen from O, S and N, optionally substituted with at least one fluorine atom and/or at least one hydroxyl group, and a phenyl group optionally substituted with at least one C1 to C4 alkyl group, R8 represents a group of formula--X-G-R9 in which X, G and R9 are as defined above, m1 is an integer ranging from 1 to 998, and m2 is an integer ranging from 2 to 500, in which 1) R1, and R3, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon-based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 alkyl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the groups X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionally comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) the groups G, which may be identical or different, represent divalent groups chosen from: in which R6 is chosen from a hydrogen atom and linear and branched C1 to C20 alkyl groups, on condition that at least 50% of the groups R6 of the polymer represents a hydrogen atom and that at least two of the groups G of the polymer are a group other than: 76. The method according to claim 70, wherein the at least one gelling agent comprises at least one moiety chosen from formulae (III) and (IV): in which R1, R2, R3, R4, X, Y, m and n are as defined in claim 70. 77. The method according to claim 70, wherein X and/or Y represent an alkylene group comprising in its alkylene portion at least one group chosen from: 1째) 1 to 5 amide, urea and carbamate groups, 2째) C5 and C6 cycloalkyl groups, and 3째) a phenylene group optionally substituted with 1 to 3 identical or different C1 to C3 alkyl groups, and optionally substituted with at least one element chosen from: a hydroxyl group, C3 to C8 cycloalkyl groups, one to three C1 to C40 alkyl groups, a phenyl group optionally substituted with one to three C 1 to C3 alkyl groups, C1 to C3 hydroxyalkyl groups, and C1 to C6 aminoalkyl groups. 78. The method according to claim 70, wherein Y represents: in which R5 represents a polyorganosiloxane chain and T represents a group of formula: in which a, b and c are, independently, integers ranging from 1 to 10, and R10 is chosen from a hydrogen atom and groups defined for R1, R2, R3 and R4 in claim 70. 79. The method according to claim 70, wherein R1, R2, R3 and R4, which may be identical or different, are chosen from linear and branched C1 to C40 alkyl groups, polyorganosiloxane chains and a phenyl group optionally substituted with one to three groups chosen from methyl and ethyl groups. 80. The method according to claim 79, wherein the linear and branched C1 to C40 alkyl groups are chosen from CH 3, C2H5, n-C3H7 and isopropyl groups. 81. The method according to claim 56, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which X1 and X2, which may be identical or different, have the meaning given for X below, n, Y and T are as defined below, R11 to R18 are groups chosen from the same group as R1 to R4 of below, m1 and m2 are integers in the range from 1 to 1 000, and p is an integer ranging from 2 to 500, 1) R1, R2, R3, and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500. 82. The method according to claim 81, wherein: p is in the range from 1 to 25, R11 to R18 are methyl groups, T corresponds to one of the following formulae: in which R19 is chosen from a hydrogen atom and groups chosen from the groups defined for R1 to R4 in claim 70, and R20, R21 and R22 are chosen from linear and branched alkylene groups, m1 and m2 are in the range from 15 to 500, X1 and X2 represent--(CH2) 10--, and Y represents--CH2--. 83. The method according to claim 82, wherein p is in the range from 1 to 7. 84. The method according to claim 82, wherein T corresponds to the formula: wherein R20, R21 and R22 represent--CH2--CH2--. 85. The method according to claim 82, wherein m1 and m2 are in the range from 15 to 45. 86. The method according to claim 56, the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety corresponding to the following formula: in which R1, R2, R3, R4, X, Y, m and n have the meanings given below, and U is chosen from--O--and--NH--, or Y is chosen from C5 to C12 cycloaliphatic and aromatic groups that maybe substituted with a group chosen from C 1 to C15 alkyl groups and C5 to C10 aryl groups, or Y is chosen from linear and branched C1 to C40 alkylene radicals and C4 to C12 cycloalkylene radicals, or Y is chosen from polyurethane and polyurea blocks corresponding to the condensation of several diisocyanate molecules with at least one coupling agent of the diol or diamine type, corresponding to the formula: in which B1 is a group chosen from the groups given above for Y, U is chosen from--O--and--NH--and B2 is chosen from: linear and branched C1 to C40 alkylene groups, which can optionally bear an ionizable group, and neutralizable and quaternizable tertiary amine groups, C5 to C12 cycloalkylene groups, optionally bearing alkyl substituents, alkylene groups, and diol radicals, phenylene groups that may optionally bear C 1 to C3 alkyl substituents, and groups of formula: in which T is a hydrocarbon-based trivalent radical optionally comprising at least one hetero atom and R5 is chosen from polyorganosiloxane chains and linear and branched C1 to C50 alkyl chains, 1) R1, R2, R3, and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500, and m is an integer ranging from 1 to 1 000. 87. The method according to claim 86, wherein Y, which is chosen from C5 to C12 cycloaliphatic and aromatic groups that may be substituted with a group chosen from C1 to C15 alkyl groups and C5 to C10 aryl groups, is a radical chosen from the methylene-4,4-biscyclohexyl radical, the radical derived from isophorone diisocyanate, 2,4-and 2,6-tolylenes, 1,5-naphthylene, p-phenylene and 4,4'-biphenylenemethane. 88. The method according to claim 86, wherein the ionizable group is chosen from carboxylic acid and sulphonic acid groups. 89. The method according to claim 86, wherein the alkyl substituents are chosen from one to three groups chosen from methyl and ethyl groups. 90. The method according to claim 86, wherein the diol radicals are chosen from cyclohexanedimethanol. 91. The method according to claim 86, wherein the at least one hetero atom is chosen from oxygen, sulphur and nitrogen. 92. The method according to claim 56, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which R1, R2, R3, m1 and m2 have the meanings given below, U is chosen from O and NH, R23 is chosen from C1 to C40 alkylene groups, optionally comprising at least one hetero atom chosen from O and N, and a phenylene group, and R24 is chosen from linear, branched and cyclic, saturated and unsaturated C1 to C50 alkyl groups, and a phenyl group optionally substituted with one to three C1 to C 3 alkyl groups, 1) R1, R2and R3, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) m1 and m2 are integers in the range from 1 to 1 000. 93. The method according to claim 56, wherein the at least one gelling agent chosen from homopolymers and copolymers comprises at least one moiety of formula: in which X1 and X2, which are identical or different, have the meaning given for X below, n, Y and T are as defined below, R11 to R18 are groups chosen from the same groups as R1 to R4 below, m1 and m2 are integers in the range from 1 to 1 000, and p is an integer ranging from 2 to 500, in which 1) R1, R2, R3, and R4, which may be identical or different, are chosen from: linear, branched and cyclic, saturated and unsaturated, C 1 to C40 hydrocarbon: based groups, optionally comprising in the chain at least one atom chosen from oxygen, sulphur and nitrogen, and also optionally being partially or totally substituted with at least one fluorine atom, C6 to C10 aryl groups, optionally substituted with at least one C1 to C4 aryl group, polyorganosiloxane chains optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen; 2) the group X, which may be identical or different, are chosen from linear and branched C1 to C30 alkylenediyl groups, optionaly comprising in the chain at least one atom chosen from oxygen and nitrogen; 3) Y is chosen from saturated and unsaturated, C1 to C50 linear and branched divalent alkylene, arylene, cycloalkylene, alkylarylene and arylalkylene groups, optionally comprising at least one atom chosen from oxygen, sulphur and nitrogen, and optionally substituted by one of the following atoms and groups of atoms: fluorine, hydroxyl, C3 to C8 cycloalkyl, C1 to C40 alkyl, C5 to C10 aryl, phenyl optionally substituted with 1 to 3 C1 to C3 alkyl groups, C1 to C3 hydroxyalkyl and C1 to C6 aminoalkyl, or 4) Y represents a group corresponding to the formula: in which T is chosen from linear and branched, saturated and unsaturated, C3 to C24 trivalent and tetravalent hydrocarbon-based groups optionally substituted with a polyorganosiloxane chain, and optionally comprising at least one atom chosen from O, N and S, or T represents a trivalent atom chosen from N, P and A1, and R5 chosen from linear and branched C1 to C50 alkyl groups and polyorganosiloxane chains, optionally comprising at least one group chosen from ester, amide, urethane, thiocarbamate, urea, thiourea and sulphonamide groups, which may optionally be linked to another chain of the polymer; 5) n is an integer ranging from 2 to 500. 94. The method according to claim 70, wherein the at least one gelling agent furthermore comprises a hydrocarbon-based moiety comprising two groups capable of establishing hydrogen interactions, chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea and thiourea groups. 95. The method according to claim 94, wherein the at least one gelling agent is chosen from block copolymers and grafted copolymers. 96. The method according to claim 56, wherein the at least one gelling agent represents from 0.5% to 80% relative to the total weight of the composition, and the solid particles with a hydrophobic surface represent from 0.1% to 90% relative to the total weight of the composition. 97. The method according to claim 96, wherein the at least one gelling agent represents from 2% to 60% relative to the total weight of the composition. 98. The method according to claim 97, wherein the at least one gelling agent represents from 5% to 40% relative to the total weight of the composition. 99. The method according to claim 96, wherein the solid particles with a hydrophobic surface represent from 1% to 70% relative to the total weight of the composition. 100. The method according to claim 99, wherein the solid particles with a hydrophobic surface represent from 2% to 50% relative to the total weight of the composition. 101. The method according to claim 56, wherein said composition further comprises at least one active agent chosen from cosmetic and dermatological active agents. 102. The method according to claim 56, wherein said composition is in the form of a mascara cake, an eyeliner, a foundation, a lipstick, a blusher, an eyeshadow, a face powder or a concealer product.