Patent ID: 6933356

Claim:
A process for preparing carboxyl group-containing polymer particles, comprising reacting 6 to 25 parts by volume of an α,β-unsaturated carboxylic acid based on 100 parts by volume of an inert solvent, with 0.15 to 2 parts by weight of a compound having at least two ethylenic unsaturated groups based on 100 parts by weight of the α,β-unsaturated carboxylic acid at 50° to 90° C. in the inert solvent in the presence of 0.01 to 0.45 parts by weight of a radical polymerization catalyst and 0.01 to 5 parts by weight of an alkali metal carbonate based on 100 parts by weight of the α,β-unsaturated carboxylic acid.