CROSSLINKED COPOLYMER OF UNSATURATED CARBOXYLIC ACID AND PROCESS FOR PRODUCING THE SAME, COPOLYMER OF UNSATURATED CARBOXYLIC ACID, BIODEGRADABLE BUILDER, AND DETERGENT COMPOSITION

摘要

A crosslinked carboxylic acid copolymer excellent in water absorption and biodegradability; a process for producing the crosslinked copolymer; an unsaturated carboxylic acid polymer having excellent detergency; a use of the polymer; a biodegradable builder; a detergent composition; and a dispersant. (1) The crosslinked copolymer is one obtained from monomer ingredients comprising an unsaturated monocarboxylic acid monomer and a specific amount of a quinone. (2) The unsaturated carboxylic acid polymer is either one having specific proton NMR spectrum absorption peaks and a specific number-average molecular weight and having the ability to trap calcium ions or one having a specific structure.