| abstract |
To provide a copolymer which is, when incorporated to a detergent composition, excellent in the smoothness in finger-combing in rinsing after washing and in the smoothness, silky texture and non-stiffness of the hair after drying; and a detergent composition. n A copolymer comprising constituting units corresponding to a cationic vinyl monomer (A) and constituting units corresponding to a specific vinyl monomer (B) having a hydroxyl group or an amide group, wherein the proportion of the constituting units corresponding to the cationic vinyl monomer (A) is from 25 to 45 mol% based on the entire constituting units constituting the copolymer. |