Process for Producing Granular Carboxylated-Polymer Particle and Granular Carboxylated-Polymer Particle

摘要

An object of the 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 invention provides a method for producing a granular carboxyl group-containing polymer particle which comprises producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by causing the carboxyl group-containing particles to absorb moisture to a moisture content of 5 to 25% by weight and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.