Patent ID: 8722028

Claim:
A method for treating hair which comprises applying to the hair, a cosmetic composition comprising, in a physiologically acceptable medium, at least one random ethylenic copolymer consisting of: a) from 10% to 80% by weight, relative to the total weight of the copolymer, of at least one monomer chosen from compounds of formula (I): wherein: R 1 is chosen from a hydrogen atom and linear and branched hydrocarbon radicals C p H 2p+1 wherein p is an integer ranging from 1 to 12 inclusive; Z is a divalent group chosen from —COO—, —CONH—, —CONCH 3 —, —OCO—, —O—, —SO 2 —, —CO—O—CO— and —CO—CH 2 —CO—; x is chosen from 0 and 1; R 2 is chosen from linear, branched and cyclic, saturated and unsaturated, optionally aromatic, divalent hydrocarbon radicals having from 1 to 30 carbon atoms, m is chosen from 0 and 1; n is an integer ranging from 3 to 300 inclusive; R 3 is chosen from a hydrogen atom and linear, branched and cyclic, saturated and unsaturated, optionally aromatic, hydrocarbon radical with 1 to 30 carbon atoms; and salts thereof; and b) from 20% to 90% by weight, relative to the total weight of the copolymer, of an anionic monomer, chosen from monomers of formula (II): wherein: R 1 is chosen from a hydrogen atom and linear and branched hydrocarbon radicals C p H 2p+1 wherein p is an integer ranging from 1 to 12 inclusive; Z′ is a divalent group chosen from —COO—, —OCO— or —O—, —SO 2 —, —CO—O—CO— and —CO—CH 2 —CO—; x′ is chosen from 0 and 1; R′ 2 is chosen from linear, branched and cyclic, saturated and unsaturated, optionally aromatic, divalent hydrocarbon radicals having 1 to 30 carbon atoms; m′ is chosen from 0 and 1; Y is a group chosen from —COOH, and salts thereof.