Patent ID: 6667377
Filing Date: 2003-12-23
Classification: C07C,C08F

Abstract:
An ionic polymer (ionomer) comprising monomer units of vinylidene fluoride and further comprising 05-50 mol-% of trifluoroethylene monomer units having pendant groups comprising the radical represented by the formulaâ€”(OCF2CFR)aOCF2(CFRâ€²)bSO2Xâˆ’(M+)(Y)(Z)câ€ƒâ€ƒ(I) whereinR and Râ€² are independently selected from F, Cl or a perfluoroalkyl group having 1 to 10 carbon atoms optionally substituted by one or more ether oxygens; a=0, 1 or 2; b=0 to 6; M+ is H+ or a univalent metal cation; X is C or N with the proviso that c=1 when X is C and c=0 when X is N; when c=1, Y and Z are electron-withdrawing groups selected from the group consisting of CN, SO2Rf, SO2R3, P(O)(OR3)2, CO2R3, P(O)R32, C(O)RfC(O)R3, and wherein Rf is a pertluoroalkyl group of 1-10 carbons optionally substituted with one or more ether oxygens;R3 is an alkyl group of 1-6 carbons optionally substituted with one or more ether oxygens, or an aryl group optionally further substituted; Y and Z are the same or different; or, when c=0, Y may be an electron-withdrawing group represented by the formula â€”SO2Rfâ€² where Rfâ€² is the radical represented by the formula â€”(Rfâ€³SO2Nâ€”(M+)SO2)mRfâ€²â€³ where m=0 or 1, and Rfâ€³. is â€”CnF2nâ€” and Rfâ€²â€³ is â€”CnF2n+1 where n=1-10, optionally substituted with one or more ether oxygens said ionomer being characterized by a melting point of greater than or equal to 150Â° C.