Process for producing fluorinated copolymer

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United States of America Patent

PATENT NO 9682370
APP PUB NO 20140080930A1
SERIAL NO

14080955

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Abstract

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Provided is a process for producing a fluorinated copolymer which is capable of providing an ion exchange membrane which can suppress a decrease in current efficiency by impurities in an aqueous alkali chloride solution as a raw material on electrolysis of the alkali chloride aqueous solution. Also provided is a process for producing a fluorinated copolymer that comprises washing a fluorinated copolymer comprising a fluorinated monomer having a carboxylic acid type functional group and a fluorinated olefin, with a washing solvent containing a fluorinated solvent at a temperature of at least 40° C. and at most a boiling point of the washing solvent.

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Patent Owner(s)

  • ASAHI GLASS COMPANY, LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aida, Shigeru Chiyoda-ku, JP 37 236
Fukunaga, Shintaro Chiyoda-ku, JP 15 27
Hattori, Yukiko Chiyoda-ku, JP 13 8
Tomita, Toshinori Chiyoda-ku, JP 6 21
Tsuji, Atsushi Chiyoda-ku, JP 36 98
Umemura, Kazuo Chiyoda-ku, JP 26 305

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