Patent ID: 8535651

Claim:
A method of treating a keratin-based substrate comprising applying to said keratin-based substrate a cosmetically acceptable medium containing from 0.1-99.9% by weight of a polymer surfactant complex; wherein the polymer surfactant is formed by polymerizing a monomer mixture comprising: (A) acid functional monomers at least partially neutralized with one or more amines according to one or more of formulas (I) through (IV): R 1 —NR 2 R 3 (I) R 1 —N + R 2 R 3 R 7 X − (II) R 4 —C(O)—NR 5 —R 6 —NR 2 R 3 (III) R 4 —C(O)—NR 5 —R 6 —N + R 2 R 3 R 7 X − (IV) wherein R 1 and R 4 are independently C 8 -C 24 linear, branched or cyclic alkyl, aryl, alkenyl, aralkyl or aralkyl; R 2 , R 3 and R 5 are independently H or C 1 -C 6 linear, branched or cyclic alkyl, or where R 2 and R 3 combine to form an anelled ring of from 4 to 12 carbon atoms in length optionally containing hetero atoms along the ring selected from O, S, or N; R 6 is C 1 -C 24 linear, branched or cyclic alkylene, arylene, alkenylene, aralkylene or aralkylene, R 7 is H, C 1 -C 12 linear, branched or cyclic alkylene, arylene, alkenylene, aralkylene or aralkylene, and X is a halide, a sulfate or a sulfonate; (B) one or more cationic monomers; and optionally (C) one or more other monomers.