METHOD FOR PRODUCING CORE-SHELL HIGH LIQUID-ABSORBING RESIN PARTICLE

摘要

A method for producing a core-shell high liquid-absorbing resin particle is characterized by having (1) a first step for forming a particle core portion by suspension-polymerizing an aqueous solution (e) containing a (meth)acrylic acid, a crosslinking agent (c) and an anionic surfactant (d) in a hydrophobic organic solvent (a) containing a nonionic surfactant (b), and (2) a second step for forming a shell portion covering the particle core portion by suspension-polymerizing an aqueous solution (g) containing a water-soluble vinyl polymer (f) with a number-average molecular weight of 500-10,000 having a carboxyl group and a polymerizable unsaturated double bond in the suspension obtained in the first step.