Title:
WATER-ABSORBING RESIN
Document Type and Number:
WIPO Patent Application WO/2012/023433
Kind Code:
A1
Abstract:
The primary purpose of the present invention is to provide a water-absorbing resin that has excellent liquid permeability while also having an appropriate absorption capacity and that is ideal for use in an absorbent article for use as a sanitary material or the like. The present invention is a water-absorbing resin formed by reverse-phase suspension polymerization of a water-soluble ethylenic unsaturated monomer in the presence of a dispersion stabilizer to obtain primary particles and causing these particles to coagulate by means of additional reverse-phase suspension polymerization, wherein the water-absorbing resin is characterized in that the median grain size of the primary particles is 100 to 250 µm and the physiological saline-retaining capability of the water-absorbing resin is 30 g/g or less.
Inventors:
TAKATORI JUNICHI (JP)
KONDO KIMIHIKO (JP)
HANDA MASAYOSHI (JP)
KONDO KIMIHIKO (JP)
HANDA MASAYOSHI (JP)
Application Number:
PCT/JP2011/067748
Publication Date:
February 23, 2012
Filing Date:
August 03, 2011
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
TAKATORI JUNICHI (JP)
KONDO KIMIHIKO (JP)
HANDA MASAYOSHI (JP)
TAKATORI JUNICHI (JP)
KONDO KIMIHIKO (JP)
HANDA MASAYOSHI (JP)
International Classes:
C08F2/32
Foreign References:
| JPH11279207A | 1999-10-12 | |||
| JP2006089525A | 2006-04-06 | |||
| JP2006131767A | 2006-05-25 | |||
| JPH03227301A | 1991-10-08 | |||
| JPH0517509A | 1993-01-26 | |||
| JPH0912613A | 1997-01-14 | |||
| JPH0977810A | 1997-03-25 | |||
| JPH03227301A | 1991-10-08 | |||
| JPH0517509A | 1993-01-26 | |||
| JPH0912613A | 1997-01-14 | |||
| JPH0977810A | 1997-03-25 |
Other References:
See also references of EP 2607383A4
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)
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Claims: