Patent ID: 7847001

Claim:
A fluoropolymer liquid composition comprising a fluoropolymer liquid (A) which comprises a liquid medium and a crosslinkable functional group-containing crosslinkable fluoropolymer, wherein said fluoropolymer liquid (A) is a fluoropolymer liquid dispersion (AD) having, dispersed in a liquid dispersion medium, particles of a crosslinkable fluoropolymer (PD) containing acid/acid salt groups or organic groups capable of undergoing hydrolysis and thus being converted to carboxyl groups, or a fluoropolymer solution (AS) having, dissolved in a fluorosolvent or an alcohol/water mixed solvent, a crosslinkable fluoropolymer (PS) containing acid/acid salt groups or acid/acid salt groups precursors; said acid/acid salt groups are sulfonic acid groups, carboxyl groups or groups of the formula —SO 2 NR 2 R 3 , —SO 3 NR 4 R 5 R 6 R 7 , —SO 3 M 1 1/L , —COONR 8 R 9 R 10 R 11 or —COOM 2 1/L , wherein R 2 represents a hydrogen atom or M 5 1/L , R 3 represents an alkyl group or a sulfonyl-containing group, R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 and R 11 are the same or different and each represents a hydrogen atom or an alkyl group, and M 1 , M 2 and M 5 each represents a metal having a valence of L, said metal having a valence of L being a metal belonging to the group 1, 2, 4, 8, 11, 12 or 13 of the periodic table; and said acid/acid salt groups precursors are —SO 2 F, —SO 2 NR 22 R 23 (wherein R 22 and R 23 are the same or different and each represents an alkyl group) or organic groups capable of undergoing hydrolysis and thus being converted to carboxyl groups, wherein the crosslinkable functional group is a cyano group, —I or —Br, wherein said fluoropolymer liquid composition comprises the fluoropolymer liquid (A) and, further, a crosslinking agent (B), said crosslinking agent (B) being; a crosslinking agent (B1) represented by the general formula (III): wherein one of R 19 and R 20 represents —NH 2 and the other represents —NH 2 , —NH-Ph, —OH or —SH, Ph represents phenyl group and R 21 represents —SO 2 —, —O—, —CO—, an alkylene group containing 1 to 6 carbon atoms, a perfluoroalkylene group containing 1 to 10 carbon atoms or a single bond, or a polyfunctional unsaturated compound.