| abstract |
[PROBLEMS] To provide a hair treatment agent which can give stiffness to hair and impart excellent conditioning effects such as flexibility and smoothness, and these effects are not lost even by washing hair and have excellent durability. To provide. A copolymer containing at least a unit having an anionic group and a unit having a silicon atom in one molecule and / or containing a compound having an anionic group and a silicon atom in one molecule. A hair treatment agent. Further, it may contain a cationic surfactant or silicone. [Selection diagram] None |