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. 20, 2016
Filed:
May. 21, 2012
Applicants:
Makoto Kato, Tokyo, JP;
Toru Ido, Himeji, JP;
Shizuka Hachiken, Himeji, JP;
Inventors:
Assignee:
SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/12 (2006.01); C08G 65/08 (2006.01); C08G 65/10 (2006.01); C08G 65/26 (2006.01);
U.S. Cl.
CPC ...
C08G 65/08 (2013.01); C08G 65/10 (2013.01); C08G 65/12 (2013.01); C08G 65/266 (2013.01); C08G 65/269 (2013.01); Y10T 428/2982 (2015.01);
Abstract
The present invention relates to a production method of polyalkylene oxide particles including a step of forming the polyalkylene oxide particles by polymerization of an alkylene oxide in a polymerization solution containing a polymerization solvent and a catalyst dispersed in the polymerization solvent. The average particle diameter of the catalyst is 25 μm or less.