Patent ID: 8475970
Filing Date: 2013-07-02
Classification: C08F,C08G,C08J,C09D,H01M,Y02E,Y02P,Y10T

Abstract:
1. A fluororesin-coated polymer film for reinforcing a polymer electrolyte membrane, wherein said fluororesin-coated polymer film is fabricated by forming on at least one side of a polymer film a coating of a reaction product of (A) a fluorine-containing copolymer composed of a fluoroolefin represented by formula (1) below, a cyclohexyl group-containing acrylic ester represented by formula (2) below, and a hydroxyl group-containing vinyl ether represented by formula (3) below, and (B) a crosslinking agent having two or more isocyanate groups, said formulas (1), (2), and (3) being given as (where X is F or H, and Y is H, Cl, F, or CF 3 ) (where R 1 is a hydrogen or methyl group), and (where R 2 is an alkylene group with a carbon number of 2 to 5 or a cyclohexylene group), wherein the fluororesin-coated polymer film is bonded to at least one side of said polymer electrolyte membrane with the fluororesin-coated face of said polymer film contacting a peripheral portion of said polymer electrolyte membrane in a frame-like manner.