Title:
A manufacturing method of water absorbency resin particles
Document Type and Number:
Japanese Patent JP5927289
Kind Code:
B2
Abstract:
There is disclosed a method for producing water-absorbent resin particles comprising a step that includes reversed-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a suspension containing a surfactant that comprises a surfactant that comprises a fatty acid ester of sorbitan or sorbitol, or derivative thereof, and a hydrocarbon dispersion medium. The fatty acid ester includes a lauric acid ester and at least one kind of other ester selected from the group consisting of palmitic acid esters, stearic acid esters and behenic acid esters. The proportion of the peak area for lauric acid ester is 30-60%, based on the total peak area for fatty acid esters in the GPC chromatogram obtained from the fatty acid esters, and the proportion of the total peak area for other ester is 10-50%.
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Inventors:
Kenji Tanimura
Yabuguchi Hiroki
Yuichi Onoda
Masayoshi Handa
Yabuguchi Hiroki
Yuichi Onoda
Masayoshi Handa
Application Number:
JP2014502067A
Publication Date:
June 01, 2016
Filing Date:
January 22, 2013
Export Citation:
Assignee:
Sumitomo Seika Co., Ltd.
International Classes:
C08F2/32; C08F20/00
Domestic Patent References:
| JP2008037971A | ||||
| JP7070245A |
Foreign References:
| WO2007123188A1 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshinori Shimizu
Hideki Okita
Yoshinori Shimizu
Hideki Okita
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