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:
May. 17, 2016
Filed:
Aug. 26, 2013
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Kaori Abe, Chiyoda-ku, JP;
Shigeru Aida, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Abstract
A process for producing a fluorinated copolymer includes polymerizing a fluorinated monomer having a carboxylic acid functional group or a sulfonic acid functional group and tetrafluoroethylene by a solution polymerization method in a polymerization medium in the presence of a polymerization initiator to obtain a mixture. The mixture contains a fluorinated copolymer, an unreacted fluorinated monomer having the carboxylic acid functional group or the sulfonic acid functional group, and the polymerization medium. The mixture is continuously or intermittently transferred to an evaporation container equipped with a stirring machine and heated in the evaporation container with stirring to evaporate and recover a mixed liquid. The mixed liquid contains the unreacted fluorinated monomer and the polymerization medium with which the polymerization initiator is mixed. The recovered mixed liquid is heated to decompose the polymerization initiator.