Title:
吸水性樹脂の製造方法
Document Type and Number:
Japanese Patent JP5378790
Kind Code:
B2
Abstract:
A purpose of the present invention is to reduce odor of a water-absorbent resin during absorption of water. Such the invention is attained by a process for production of a water-absorbent resin by subjecting a water-soluble ethylenically unsaturated monomer to reversed-phase suspension polymerization. The process comprises the following steps (A) to (C): (A) adding an aqueous solution of water-soluble ethylenically unsaturated monomer to a petroleum hydrocarbon dispersion medium to disperse the aqueous solution in the dispersion medium; (B) adding a surfactant to the emulsion to further disperse the emulsion; and (C) performing the reversed-phase suspension polymerization using a water-soluble radical polymerization initiator, optionally in the presence of an internal-crosslinking agent.
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Inventors:
Hideki Yokoyama
Yasuhiro Nawata
Yasuhiro Nawata
Application Number:
JP2008513261A
Publication Date:
December 25, 2013
Filing Date:
April 26, 2007
Export Citation:
Assignee:
Sumitomo Seika Co., Ltd.
International Classes:
C08F2/18; C08F2/32; C08F20/04; C08F20/56
Domestic Patent References:
| JPH11167102A | 1999-06-22 | |||
| JP2005255848A | 2005-09-22 | |||
| JPH03195709A | 1991-08-27 | |||
| JPH11167102A | 1999-06-22 | |||
| JP2005255848A | 2005-09-22 | |||
| JPH09143210A | 1997-06-03 |
Foreign References:
| WO2005012369A1 | 2005-02-10 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Hiroshi Yamazaki
Tsuyoshi Sato
Hiroshi Yamazaki
Tsuyoshi Sato