Patent ID: 7235231

Claim:
A cosmetic composition comprising a diblock copolymer, comprising two blocks A and B, wherein block A is a polycationie block in the pH conditions of the composition, comprising units deriving from a cationic monomer selected from the group consisting of: trimethylammonium ethyl (meth)acrylate chloride, trimethylammonium ethyl (meth)acrylate methyl sulphate, dimethylammonium ethyl (meth)acrylate benzyl chloride, 4-benzoylbenzyl dimethylammonium ethyl acrylate chloride, trimethyl ammonium ethyl (meth)acrylamido chloride, trimethyl ammonium propyl (meth)acrylamido chloride, vinylbenzyl trimethyl ammonium chloride, diallyldimethyl ammonium chloride and monomers having the following formula: wherein R 1 is a hydrogen atom or a methyl or ethyl group; R 2 , R 3 , R 4 , R 5 and R 6 which are identical or different, are linear or branched C 1 -C 6 , alkyl, hydroxyalkyl or aminoalkyl groups; m is an integer from 1 to 10, n is an integer from 1 to 6. Z represents a —C(O)O—or ——C(O)NH— group or an oxygen atom; A represents a (CH 2 ) p group, p being an integer from 1 to 6. B represents a linear or branched C 2 -C 12 polymethylene chain optionafxlly interrupted by one or more heteroatoms or heterogroups, and optionally substituted by one or more hydroxyl or amino groups, and X, which are identical or different, represent counterions, block B is a neutral block in the pH conditions of the composition, and block A and block B both comprise units deriving from aipha-ethylenically-unsaturated monomers.