Title:
METHOD FOR PRODUCING CORE-SHELL HIGH LIQUID-ABSORBING RESIN PARTICLE
Document Type and Number:
WIPO Patent Application WO/2005/073263
Kind Code:
A1
Abstract:
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.
Inventors:
TANAKA HISAKAZU (JP)
YAMAMURA KAZUO (JP)
HASEGAWA YOSHIKI (JP)
KAMEI MASAYUKI (JP)
YAMAMURA KAZUO (JP)
HASEGAWA YOSHIKI (JP)
KAMEI MASAYUKI (JP)
Application Number:
PCT/JP2005/000750
Publication Date:
August 11, 2005
Filing Date:
January 21, 2005
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
TANAKA HISAKAZU (JP)
YAMAMURA KAZUO (JP)
HASEGAWA YOSHIKI (JP)
KAMEI MASAYUKI (JP)
TANAKA HISAKAZU (JP)
YAMAMURA KAZUO (JP)
HASEGAWA YOSHIKI (JP)
KAMEI MASAYUKI (JP)
International Classes:
B01J20/26; C08F265/02; C08F265/04; (IPC1-7): C08F290/04; A61F13/49; A61F13/53; A61L15/60; B01J20/26
Foreign References:
| JP2003033652A | 2003-02-04 | |||
| JP2003245544A | 2003-09-02 | |||
| JP2003206324A | 2003-07-22 | |||
| JP2001220415A | 2001-08-14 | |||
| JP2001031704A | 2001-02-06 | |||
| JPH06506252A | 1994-07-14 | |||
| JP2005047977A | 2005-02-24 |
Other References:
See also references of EP 1669381A4
Attorney, Agent or Firm:
Shiga, Masatake (Yaesu Chuo-ku, Tokyo, JP)
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