Patent ID: 8741825

Claim:
A method for cleansing hair, comprising contacting hair with a hair cleansing composition comprising ingredients (A), (B), (C), and (D) at a weight ratio of (A) to (B) [(A)/(B)] of from 0.1 to 1.2, at a weight ratio of (A) to (C) [(A)/(C)] of from 0.1 to 1.2, at a weight ratio of (D) to the total weight of (A), (B), and (C) [(D)/((A)+(B)+(C))] of from 0.005 to 0.1, and at a total weight of (A), (B), and (C) [(A)+(B)+(C)] of from 5 to 30 wt %: (A) 1 to 8 wt. % of an ether carboxylate surfactant of formula (4): R 11 —Z 1 -(A 1 O) n —Y 1 —COOX 1 (4) wherein R 11 represents an alkyl or alkenyl group which may contain a linear or branched hydroxyl group having from 12 to 16 carbon atoms, Z 1 represents —O—, A 1 represents an alkylene group having 2 carbon atoms, X 1 represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or an organic ammonium, Y 1 represents an alkylene group having from 1 to 3 carbon atoms, and n stands for an average addition molar number and is from 4 to 10, (B) 1 to 15 wt. % of an ether sulfate surfactant of formula (6): R 13 O(CH 2 CH 2 O) p SO 3 M 2 (6) wherein R 13 represents an alkyl or alkenyl group having from 10 to 18 carbon atoms, p means an average addition molar number and is from 0.5 to 3, and M 2 represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or an organic ammonium, (C) 2 to 15 wt. % of one or more betaine amphoteric surfactant selected from the group consisting of carbobetaine and sulfobetaine, and (D) 0.01 to 3 wt % of a cationic-group containing copolymer obtained by the copolymerization of a monomer mixture containing the following monomers (a1), (a2), and (a3): (a1) at least one hydrophilic nonionic-group containing vinyl monomer of formula (I): wherein R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrogen atom or a linear alkyl group having from 1 to 4 carbon atoms, and R 3 represents a linear alkyl group having from 1 to 4 carbon atoms; (a2) at least one cationic-group containing vinyl monomer of formula (III): wherein R 1 has the same meaning as described above, R 4 and R 5 are the same or different and each represents an alkyl group having from 1 to 4 carbon atoms, R 6 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, Y represents a group —O—, Z represents a linear or branched alkylene group having from 1 to 4 carbon atoms, and X is an alkyl sulfate group having from 1 to 4 carbon atoms; and (a3) a crosslinkable monomer having two or more reactive unsaturated groups, wherein the molar ratio of (a1)/(a2) ranges from 60/40 to 93/7, and wherein (a3) is present in an amount of from 0.002 to 0.08 wt % based on the total amount of monomers.