Patent ID: 7476714

Claim:
A composition comprising a polymer prepared by contacting a polyfluoroalkyl sulfonyl halide of formula I R f —R 1 —SO 2 X I wherein R f is a straight or branched perfluoroalkyl group having from about 2 to about 20 carbon atoms, R 1 is a divalent linking group C k H 2k wherein k is 0 to about 20, and X is halogen, with a silane compound of Formula II, III or IV (E-(O) q ) 3 Si—O—(Si(R 2 ) 2 —O) m —[Si(R 3 —NHR 4 )(R 2 )O] n —Si—((O) q -E) 3 Formula II HR 4 N—R 3 —Si(R 2 ) 2 —O—[Si(R 2 ) 2 —O] m —[Si(R 3 —NHR 4 )(R 2 )O] n —Si(R 2 ) 2 —R 3 —NHR 4 Formula III HR 4 N—R 3 —Si(R 2 ) 2 —O—[Si(R 2 ) 2 —O] m —Si—((O) q -E) 3 Formula IV wherein each R 2 is independently a C 1 to C 8 alkyl, each R 3 is independently a divalent group containing carbon, oxygen, and optionally nitrogen, with proviso that R 3 does not contain sulfur, each R 4 is independently H or C 1 to C 8 alkyl, each E is independently a C 1 to C 8 branched or linear alkyl, each q is independently zero or 1, m is a positive integer, and n is independently a positive integer, such that n/(m+n) is a positive fraction having a value up to about 0.7, and the polymer viscosity is less than or equal to 10000 mPas under a shear rate of 0.1 s −1 at a temperature of 20° C.; wherein the sulfonylhalide is of the formula F(CF 2 ) p CH 2 CH 2 SO 2 X and p is from about 2 to about 20, and mixtures thereof.