METHOD FOR PRODUCING CORE-SHELL HIGH LIQUID-ABSORBING RESIN PARTICLE
申请人:DIC Corporation
公开号:EP1669381B1
公开(公告)日:2010-10-13
Method for Producing Core-Shell Type Highly Liquid Absorbent Resin Particles
申请人:Tanaka Hisakazu
公开号:US20070276061A1
公开(公告)日:2007-11-29
The present invention discloses a production method of core-shell type highly liquid absorbent resin particles comprising: (1) a first step in which a particle core portion is formed by suspension polymerizing an aqueous solution (e) containing (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 in which a shell portion that covers the particle core portion is formed by suspension polymerizing an aqueous solution (g) containing a water-soluble vinyl polymer (f), having carboxyl groups and polymerizable unsaturated double bonds and having a number average molecular weight of 500 to 10000, in a suspension obtained in the first step.