Patent ID: 8591923

Claim:
A cosmetic composition comprising: a physiologically acceptable medium, and a copolymer, in said medium, having a (thio)urethane/(thio)urea polymer skeleton, resulting from the reaction: of monomer (a) having the structure ((II) of at least one monomer (b1) represented by the formula HO—R b1 —OH, in which R b1 is a divalent polymer radical selected from the group of polyesters based on adipic acid and poly-(2-methyl-1,3-propylene)-glutarate; and polyolefins bearing units selected from the group consisting of 1,2-butadiene, 1,4-butadiene, isoprene, ethylene, propylene, 1,2-butylene, 1,4-butylene, isobutylene; and 1,2-butadiene, wherein monomer (b1)has a weight-average molecular weight (Mw) ranging from 500 to 30,000; and of at least one ionizable monomer (b2) selected from the group consisting of N-methyldiethanolamine; N-tert-butyldiethanolamine; N-ethyldiethanolamine; dimethylolpropionic acid; dimethylaminopropionic acid;, N-ethylsulphonic-dimethanolamine and N-ethylsulphonic-diethanolamine.