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:
Apr. 21, 2020
Filed:
Mar. 03, 2017
Applicant:
Zeon Corporation, Chiyoda-ku, Tokyo, JP;
Inventors:
Kakuei Ozawa, Tokyo, JP;
Nobunori Abe, Tokyo, JP;
Assignee:
ZEON CORPORATION, Chiyoda-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 220/22 (2006.01); G03F 7/039 (2006.01); C08F 212/06 (2006.01); G03F 7/20 (2006.01); C08F 212/12 (2006.01);
U.S. Cl.
CPC ...
C08F 220/22 (2013.01); C08F 212/06 (2013.01); C08F 212/12 (2013.01); G03F 7/039 (2013.01); G03F 7/20 (2013.01); C08F 2800/10 (2013.01);
Abstract
The present disclosure provides a method for efficiently producing an α-alkylstyrene α-chloroacrylate copolymer having a high monomer conversion rate. According to the present disclosure, the method for producing a copolymer containing 30 mol % to 70 mol % of an α-alkylstyrene unit and 30 mol % to 70 mol % of an α-chloroacrylate unit includes a step of performing solution polymerization of a monomer composition containing α-alkylstyrene and α-chloroacrylate, and uses ketone as a polymerization solvent for the solution polymerization.