Patent ID: 6887927

Claim:
A composition comprising: (a) a fluoropolymer comprising interpolymerized units derived from a nitrogen-containing cure site monomer and less than about 10 mole percent of interpolymerized units derived from hydrogen-containing monomers; (b) a catalyst composition comprising at least one anionic functional group having the formula: R(A (âˆ’) ) n wherein A is an anionic acidic group or anionic derivative of an acidic group, n is 1-10, wherein R is hydrogen or a C 1 -C 20 alkyl, alkenyl, alkylene, alkenylene, or higher-functional organic moiety, cyclic, aryl, or a combination thereof, wherein R is nonfluorinated, partially fluorinated, or perfluorinated, and wherein, when n is 2, R may be a direct bond between two A groups. and comprising at least one cationic functional group having the formula: QRâ€² k (+) wherein Q is selected from phosphorous, sulfur, nitrogen, arsenic, or antimony, wherein each Râ€² is independently selected from hydrogen and a nonfluorinated, partially fluorinated, or perfluorinated, C 1 -C 20 alkyl, aryl, aralkyl, or alkenyl group, and wherein k is the valence of Q plus one; wherein the catalyst composition is a compound or the precursors thereof added separately or as a mixture; (c) a composition having the formula: Râ€³ 2 SO x wherein each Râ€³ is independently C 1 -C 30 alkyl, aralkyl, the Râ€³ groups together form a heterocyclic C 3 -C 30 cycloalkyl, aryl, or aralkyl, each Râ€³ is optionally nonfluorinated, partially fluorinated, or perfluorinated, and x is 1 or 2.