Patent ID: 8288329

Claim:
A hair-treatment composition comprising: (A) a first amphoteric surfactant having a structure represented by the following general formula (1) (where R1 represents an alkyl group the carbon number of which is 6 to 20; R2 represents a methyl group, an ethyl group, or a hydroxyethyl group; R3 represents a methyl group, an ethyl group, or a â€”CH 2 COOH group; and n is an integer from 1 to 3); (B) at least one type of second amphoteric surfactant selected from the group consisting of fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines, N-acylaminoethyl-N-2-hydroxyethylaminocarboxylic acid salts, and N-acylaminoethyl-N-carboxymethoxyethylaminocarboxylic acid salts; and (C) an acidic amino acid.