Patent ID: 7629304

Claim:
A cosmetic formulation comprising a cationic copolymer and water and/or cosmetically acceptable solvents, wherein the formulation has been formed using an aqueous solution having an a viscosity of from 1000 to 10,000 cP at 25° C. comprising 20 to 50% by weight of a cationic copolymer with molecular weight in the range 30,000 to 300,000, which copolymer comprises from 70 to 80% by weight of nonionic monomer units selected from the group consisting of unsaturated N-substituted amides, (meth)acrylates having mono- or multi-hydroxy functional group(s), acrylamide and derivatives thereof, and from 20 to 30% by weight of cationic monomer units and wherein the aqueous solution contains less than 20 ppm residual monomer.