Patent ID: 8470943

Claim:
A liquid composition comprising an organic solvent having a hydroxyl group in its molecule, and a solid polymer electrolyte material made of a copolymer dissolved or dispersed in the organic solvent, said copolymer comprising a repeating unit based on a fluoromonomer A which gives a polymer having an alicyclic structure in its main chain by radical polymerization, and a repeating unit based on a fluoromonomer B′ of the following formula (1′), wherein the repeating unit based on a fluoromonomer A is represented by the following formula (4): wherein s is 0 or 1, each of R f4 , R f5 , R f6 and R f7 which may be the same or different, is a fluorine atom or a C 1-5 perfluoroalkyl group (provided that R f4 and R f5 may be connected to form a spiro ring when s is 0), and R f8 is a fluorine atom, a C 1-5 perfluoroalkyl group or a C 1-5 perfluoroalkoxy group; CF 2 ═CF(R f ) j SO 3 M (1′) wherein j is 0 or 1,M is a hydrogen atom, an alkali metal atom or a group of NR 1 R 2 R 3 R 4 wherein each of R 1 , R 2 , R 3 and R 4 which may be the same or different, is a hydrogen atom or a monovalent organic group, and R f is a C 1-20 polyfluoroalkylene group having a straight chain or branched structure which may contain ether oxygen atoms.