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. 18, 2017
Filed:
Sep. 09, 2015
Applicant:
Asahi Glass Company, Limited, Tokyo, JP;
Inventors:
Takefumi Abe, Tokyo, JP;
Akihiko Asakawa, Tokyo, JP;
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 8/06 (2006.01); C08F 114/18 (2006.01); C08F 8/24 (2006.01); C08F 8/22 (2006.01);
U.S. Cl.
CPC ...
C08F 8/06 (2013.01); C08F 8/22 (2013.01); C08F 8/24 (2013.01); C08F 114/185 (2013.01); C08F 2810/40 (2013.01);
Abstract
To provide a terminal group conversion method and a terminal stabilizing method, which are capable of converting unstable terminal groups in a fluorinated polymer to carboxylic acid fluoride groups at a high conversion rate. A fluorinated polymer is heated at from 200 to 400° C. for at least one hour in the presence of at least 50 mol of molecular oxygen per 1 mol of unstable terminal groups in the fluorinated polymer, to convert from 50 to 100 mol % of the unstable terminal groups to carboxylic acid fluoride groups.