Title:
METHOD FOR PRODUCING WATER-ABSORBING RESIN PARTICLES
Document Type and Number:
WIPO Patent Application WO/2013/125279
Kind Code:
A1
Abstract:
Disclosed is a method for producing water-absorbing resin particles involving a polymerization step in which a suspension is prepared by suspending, in an oil-based solution containing a hydrocarbon dispersion medium and a surfactant with HLB 6 or higher, an aqueous solution containing water and a water-soluble ethylenically unsaturated monomers dissolved in the water, and in which the water-soluble ethylenically unsaturated monomers are polymerized while supplying an inert gas in the suspension. The gas supply ratio represented by the ratio of the volume of inert gas supplied in one minute to the total volume of the aqueous solution and the hydrocarbon dispersion medium is 0.1-3.0.
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Inventors:
ONODA YUICHI (JP)
TANIMURA KENJI (JP)
HANDA MASAYOSHI (JP)
UEDA KOJI (JP)
TANIMURA KENJI (JP)
HANDA MASAYOSHI (JP)
UEDA KOJI (JP)
Application Number:
PCT/JP2013/051206
Publication Date:
August 29, 2013
Filing Date:
January 22, 2013
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
International Classes:
C08F2/18; C08F20/06; C08F265/02
Foreign References:
| JPH10147606A | 1998-06-02 | |||
| JPH11147902A | 1999-06-02 | |||
| JP2010024360A | 2010-02-04 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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Claims:
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