Patent ID: 7799321

Claim:
A color cosmetic composition comprising a color ingredient and a compatible crosslinked, linear copolymer of poly(vinylamide-polymerizable carboxylic acid) as rheology modifier and film-former wherein said color ingredient comprises iron oxide and said crosslinked, linear copolymer has a composition of 1-99% of a vinyl amide polymer selected from the group consisting of vinyl pyrrolidone, vinyl caprolactam, N-vinyl formamide, N-vinyl-acetamide, N-vinyl-N-methylacetamide and mixtures thereof, and 1-99% of a polymerizable carboxylic acid monomer selected from the group consisting of (meth)acrylic acid, crotonic acid, itaconic acid, maleic acid and mixtures thereof, and a crosslinker in an amount of 0.2-3% based on weight of total monomers.