METHOD FOR PRODUCING GRANULATED CARBOXYL GROUP-CONTAINING POLYMER PARTICLE AND GRANULATED CARBOXYL GROUP-CONTAINING POLYMER PARTICLE

摘要

An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.