METHOD FOR PRODUCING UNSATURATED CARBOXYLIC ACID-BASED COPOLYMER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an unsaturated carboxylic acid- based copolymer having excellent calcium ion catching ability and biodegradability and having high availability as a builder for detergent, a detergent composition or a dispersant with good productivity. SOLUTION: This method for producing the unsaturated carboxylic acid-based copolymer comprises copolymerizing an unsaturated carboxylic acid oligomer such as acrylic acid and a bifunctional compound such as butanediol in a solvent azeotropic to water in the presence of a distannoxane catalyat.