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:
Jul. 05, 2022
Filed:
Jul. 17, 2018
Applicant:
Maruzen Petrochemical Co., Ltd., Tokyo, JP;
Inventors:
Shinji Sugihara, Fukui, JP;
Masahiro Endo, Ichihara, JP;
Assignee:
Maruzen Petrochemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 16/26 (2006.01); C08F 2/10 (2006.01); C08K 5/23 (2006.01); C08F 2/38 (2006.01);
U.S. Cl.
CPC ...
C08F 16/26 (2013.01); C08F 2/10 (2013.01); C08F 2/38 (2013.01); C08K 5/23 (2013.01);
Abstract
A method for producing a vinyl ether polymer containing an oxyethylene chain is provided, including a the step of polymerizing vinyl ether represented by formula (1) in the presence of water as a polymerization solvent, a basic compound as an additive, and an organic azo-based compound as a radical polymerization initiator, and in pH of 5 or more, and the amount of the basic compound used is 0.01 to 0.5 mol % based on an amount of the vinyl ether. Formula (1) is wherein R1 represents an alkyl group having 1 to 3 carbons, and n represents an integer from 1 to 10.