To provide a new α,β-unsaturated dicarboxy compound polymer having excellent biodegradability together with an excellent cleansing performance and an excellent chelating performance, to provide a method for producing the same and to provide a chelating agent, a builder, and a cleanser each comprising the α,β-unsaturated dicarboxy compound polymer.
The method for producing a metal α,β-unsaturated dicarboxylate polymer represented by general formula (18) [R1 is any one of a 1 to 4C hydroxyalkyl, phenyl, 2-cyano-2-propyl, and H; Ms exhibit identically or differently metal salts, respectively; (n1) is an integer of 1 to 3] comprises polymerizing a dialkyl fumarate in the presence of a radical polymerization initiator in an organic solvent and then saponifying the product.
ITO TOSHIO
MASUI MASAKAZU
MITSUI TAKEDA CHEMICALS INC