Silicon-containing block copolymer

摘要

A block copolymer comprising siloxane segments, amphoteric monomer units and/or cationic nonomer units, and if necessary monomer units of precursors thereof, and nonionic monomer units, obtained by polymerization in the presence of a special azo group-containing polysiloxane compound is useful as paint resins, coating resins and base materials for hair cosmetics.