The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2018
Filed:
Nov. 04, 2014
Applicant:
Sumitomo Seika Chemicals Co., Ltd., Kako-gun, Hyogo, JP;
Inventors:
Assignee:
SUMITOMO SEIKA CHEMICALS CO., LTD., Kako-gun, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/32 (2006.01); C08F 220/06 (2006.01); B01J 20/26 (2006.01); B01J 20/30 (2006.01); A61L 15/60 (2006.01);
U.S. Cl.
CPC ...
B01J 20/261 (2013.01); A61L 15/60 (2013.01); B01J 20/3085 (2013.01); C08F 2/32 (2013.01); C08F 220/06 (2013.01);
Abstract
The present invention provides a process for producing a water-absorbent resin, characterized in that a reverse-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer is carried out in a hydrocarbon dispersion medium comprising a dispersion stabilizer while an azo-based compound and a peroxide are combined in the presence of an internal-crosslinking agent, in that the following formulae are satisfied,0.10≤/()  (1), and0.055≤+9×≤0.120  (2),