Methods for producing liquid composition, coating liquid for catalyst layer and membrane electrode assembly

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10563021
APP PUB NO 20180079872A1
SERIAL NO

15827022

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Abstract

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To provide methods for producing a liquid composition, a coating liquid for a catalyst layer and a membrane electrode assembly, capable of making cracking less likely to occur at the time of forming a solid polymer electrolyte membrane or a catalyst layer. A copolymer having a structural unit represented by —[CF2—CF{(OCF2CFX)mOp(CF2)nSO3H}]— (wherein X: F or CF3, m: 1 to 3, p: 0 or 1, and n: an integer of 1 to 12) and a structural unit derived from tetrafluoroethylene, is dispersed in a medium containing water and a hydrocarbon-type alcohol (but not including a fluorinated solvent) to prepare a dispersion wherein the concentration of the copolymer is from 13 to 26 mass %, and the dispersion and a fluorinated solvent are mixed so that the sum of the concentration of the copolymer and the concentration of the fluorinated solvent becomes to be from 17 to 35 mass %, to prepare a liquid composition.

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Patent Owner(s)

  • AGC INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hommura, Satoru Chiyoda-ku, JP 40 201
Tanuma, Toshihiro Chiyoda-ku, JP 32 275
Watabe, Hiroyuki Chiyoda-ku, JP 29 46

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