| abstract |
The present invention provides: a novel water-soluble copolymer which is excellent in performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors. In addition, the present invention provides: a novel liquid detergent builder which has extremely excellent compatibility, high transparency when a liquid detergent composition comprises it, and excellent detergency; and a novel liquid detergent composition comprising the liquid detergent builder. The water-soluble copolymer, according to the present invention, is a novel water-soluble copolymer obtained by copolymerizing comonomers essentially including: an unsaturated monocarboxylic acid monomer (1); an unsaturated dicarboxylic acid monomer (2); and an unsaturated alcoholic monomer (3) having specific structures, with the copolymer being characterized in that the residual amount of the unsaturated dicarboxylic acid monomer is not more than 8 weight %, and the residual amount of the unsaturated alcoholic monomer is not more than 45 weight %. |