An ethylenic copolymer comprises 10-80 wt.% of a monomer having hydrocarbon-containing compound, 20-90 wt.% of an anionic monomer, and 0-70 wt.% of an additional non-ionic hydrophilic monomer. The ethylenic copolymer comprises 10-80 wt.% of monomer of Formula (I) 20-90 wt.% of anionic monomer and its salts from maleic anhydride and monomers of Formula (II) and 0-70 wt.% of additional nonionic hydrophilic monomer. R 1H, or linear and branched hydrocarbon radicals C pH 2 p + l p : 1-12 Z : divalent group consisting of -COO-, -CONH-, -CONCH 3-, -OCO-, -0-, -S0 2-, -CO-O-CO-, or -CO-CH 2CO- x : 0 or 1 R 2linear, branched, and cyclic, saturated and unsaturated, optionally aromatic, divalent hydrocarbon radicals having 1-30C and optionally comprising 1-18 heteroatoms consisting of O, N, S, F, Si, or P m : 0 or 1 n : 3-300and R 3H, or linear, branched and cyclic, saturated and unsaturated, optionally aromatic, hydrocarbon radicals having 1-30C and optionally comprising 1-20 heteroatoms consisting of O, N, S, F, Si, or P or their salts. R 1H, or linear and branched hydrocarbon radicals C pH 2 p + l p : 1-12 inclusive Z : divalent group consisting of -COO-, -OCO-, -0-, -S0 2-, -CO-O-CO-, or -CO-CH 2CO- x : 0 or 1 R 2 : linear, branched, and cyclic, saturated and unsaturated, optionally aromatic, divalent hydrocarbon radicals having 1-30C and optionally comprising 1-18 heteroatoms consisting of O, N, S, F, Si, or P m : 0 or 1and Y : -COOH-, SO 3H, -OSO 3H, -PO 3H 2, or -OPO 3H 2. An independent claim is also included for a method for treating keratinous substances comprising applying, to the keratinous substances, a cosmetic composition comprising the inventive copolymer. [Image].La présente invention concerne de nouveaux copolymères éthyléniques comprenant 10 à 80% de monomères de type (méth)acrylate de polyéthylèneglycol, 20 à 90% de monomère anionique, et 0,1 à 35% en poids dau moins un monomère hydrophile non ionique.Linvention concerne également les compositions notammen
