Fluorocopolymer material with sulfonic acid functional...

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method

Reexamination Certificate

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C429S314000, C429S317000, C521S028000, C427S384000, C204S252000

Reexamination Certificate

active

07455934

ABSTRACT:
The invention is a material for a solid polyelectrolyte, comprising a multi-segmented fluoropolymer that comprises a block copolymer and/or a graft copolymer, wherein the copolymer contains one or more blocks essentially consisting of segment A and one or more blocks essentially consisting of segment B, the segment A combines with the segment B, wherein the segment A has a molecular weight of 5,000 to 1,000.000, and the Segment A is a copolymer chain comprising (a) an ethylenicfluoromonomer containing sulfonic acid functional groups each represented by Formula (1) CX2═CX1—(O)n—Rf—SO2Y, wherein X and X1may be the same or different and are each hydrogen or fluorine; Y is FI, Cl, or OY1wherein y1is hydrogen, alkali metal or C1-C5alkyl; Rf is C1to C40divalent fluoroalkylene or C1to C40divalent fluoroalkylene having one or more ether bonds; and n is 0 or 1; and (b) at least one type of ethylenic fluoromonomer copolymerizable with the ethylenic fluoromonomer (a) and containing no sulfonic acid functional groups, the segment B is a fluoropolymer containing no sulfonic acid functional groups, has a molecular weight of 3,000 to 1,200,000, and has a crystalline melting point of 100° C. or higher or a glass transition point of 100° C. or higher, wherein the ratio of segment A:segment B in the segmented fluoropolymer is 5:9˜to 98:2 30:70 to 90:10 wt. %.

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