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:
Oct. 16, 2012
Filed:
Jan. 22, 2009
Applicants:
Akihiro Gotou, Nagoya, JP;
Hideo Matsuzaki, Nagoya, JP;
Tomotaka Mizuno, Nagoya, JP;
Inventors:
Assignee:
Toagosei Co. Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/18 (2006.01); C08F 4/40 (2006.01); C08F 220/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The inverse suspension polymerization involves a vinyl monomer and is performed in at least two steps. A water-soluble oxidizing agent and a water-soluble reducing agent are used as a polymerization initiator, and the water-soluble reducing agent is fed after the water-soluble oxidizing agent is fed.