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:
Aug. 04, 2020
Filed:
Nov. 29, 2016
Applicant:
Japan Vam & Poval Co., Ltd., Osaka, JP;
Inventors:
Yoshiaki Kozuka, Osaka, JP;
Takehiro Omori, Osaka, JP;
Assignee:
JAPAN VAM & POVAL CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 27/06 (2006.01); C08F 8/28 (2006.01); C08F 290/12 (2006.01); C08L 29/14 (2006.01); C08F 16/38 (2006.01); C08F 2/20 (2006.01); C08F 16/06 (2006.01);
U.S. Cl.
CPC ...
C08L 27/06 (2013.01); C08F 2/20 (2013.01); C08F 8/28 (2013.01); C08F 16/06 (2013.01); C08F 16/38 (2013.01); C08F 290/12 (2013.01); C08L 29/14 (2013.01);
Abstract
An object of the present invention is to provide a dispersion assistant that, when used for suspension polymerization of a vinyl-based compound, achieves stable production of a good polymer (vinyl-based resin) without much scale adhesion on the polymerization tank even in the cases where used in a large amount. Provided is a dispersion assistant for suspension polymerization, which comprises a polyvinyl alcohol-based polymer (A) having an acetal group (a) having an olefinic unsaturated double bond, the polymer having a saponification degree of 60 mol% or less.