Patent ID: 7034082
Filing Date: 2006-04-25
Classification: C08F,C08J

Abstract:
1. A process for cross-linking sulfonyl groups —SO 2 Y − (M + )A of a sulfonated polymer wherein at least a fraction of the cross-linking bonds bear an ionic charge, the process comprising contacting the polymer with a cross-linking agent allowing the reaction between two sulfonyl groups —SO 2 Y − (M + )A from adjacent polymeric chains to form the cross-linking bonds, wherein the cross-linking bonds are of the type: wherein P and P′ are the same or different and are part of a polymeric chain; Y is N or CR wherein R is H, CN, F, SO R M Q is a divalent radical C A is M, Si(R′) r is 0 or 1; and the divalent radical and the sulfonated polymer are partially or completely fluorinated.