Patent ID: 7618617

Claim:
A hair treatment composition comprising, in an aqueous cosmetically acceptable medium: (a) at least one non-ionic fixing polymer that has a beneficial effect on the hair chosen from polyvinylpyrrolidone, a copolymer of vinylpyrrolidone and vinylcaprolactam, a vinyl acetate homopolymer, a polyalkyloxazoline, a copolymer of vinyl acetate and alkyl maleate, an alkyl acrylate homopolymer, an alkyl methacrylate homopolymer, a copolymer of acrylic and methacrylic ester, a copolymer of acrylonitrile and a nonionic comonomer, a polyamide, a nonionic polyurethane or a nonionic silicone polymer; and (b) at least one water-soluble or water-dispersible linear diblock or triblock copolymer, the blocks being homopolymer blocks, comprising at least one hydrophilic block, chosen from ethylenically unsaturated carboxylic acid, 2-acrylamido-2-methylpropanesulphonic acid, a styrene-sulphonic acid, a vinylsulphonic acid or a vinylphosphonic acid and at least one hydrophobic block chosen from vinylaromatic monomer, a diene or alkyl derivative of a diene, chloroprene, a C 1-10 alkyl, C 6-10 aryl or C 6-10 aralkyl acrylate, a C 1-10 alkyl, C 6-10 aryl or C 1-10 aralkyl methacrylate, vinyl acetate, vinylether of formula CH 2 ═CH—O—R or allylether of formula CH 2 ═CH—CH 2 —O—R in which R represents a C 1-6 alkyl group, acrylonitrile, vinyl chloride, vinylidene chloride, caprolactone, ethylene, propylene or vinyl monomer that is fluorinated or that contains a perfluoro chain the hydrophilic block representing at least 30% by weight of the linear block copolymer, with the exclusion of block copolymers of ethylene oxide and propylene oxide, block copolymers containing urethane units and block copolymers containing siloxane units, in an amount that is sufficient to thicken or gel the composition, the copolymer being present in a proportion of from 0.01% to 10% by weight relative to the hair composition.