Invention Grant
US08013049B2 Method for producing core-shell type highly liquid absorbent resin particles
有权
生产核 - 壳型高吸液性树脂颗粒的方法
- Patent Title: Method for producing core-shell type highly liquid absorbent resin particles
- Patent Title (中): 生产核 - 壳型高吸液性树脂颗粒的方法
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Application No.: US10576362Application Date: 2005-01-21
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Publication No.: US08013049B2Publication Date: 2011-09-06
- Inventor: Hisakazu Tanaka , Kazuo Yamamura , Yoshiki Hasegawa , Masayuki Kamei
- Applicant: Hisakazu Tanaka , Kazuo Yamamura , Yoshiki Hasegawa , Masayuki Kamei
- Applicant Address: JP Tokyo
- Assignee: Dainippon Ink and Chemicals, Inc.
- Current Assignee: Dainippon Ink and Chemicals, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Edwards Angell Palmer & Dodge LLP
- Agent James E. Armstrong, IV; Nicholas J. DiCeglie, Jr.
- Priority: JP2004-019757 20040128
- International Application: PCT/JP2005/000750 WO 20050121
- International Announcement: WO2005/073263 WO 20050811
- Main IPC: C08F2/16
- IPC: C08F2/16 ; C08F279/02 ; C08K3/20 ; C08L83/00
Abstract:
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.
Public/Granted literature
- US20070276061A1 Method for Producing Core-Shell Type Highly Liquid Absorbent Resin Particles Public/Granted day:2007-11-29
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