Patent ID: 7307113

Claim:
A composition comprising an intimate blend of an organic polymer and 0.5-40% by weight of the composition of a siloxane, the organic polymer having a fluorinated backbone and 3-20 mol-% of pendant groups represented by the formula (I) —O p —[CF 2 CF(R f 1 )]—O m ] n —CF 2 CF 2 SO 3 X (I) wherein R f 1 is F or a perfluoroalkyl radical having 1-10 carbon atoms either unsubstituted or substituted by one or more ether oxygen atoms, m=0 or 1, n=0 to 3, p=0 or 1, and X is H or an alkali metal; the siloxane comprising two or more groups which need not be the same represented by the formula (II) —O a SiR 2 R f 2 SO 3 X (II) wherein a=3 X is is an alkali metal or hydrogen, R 2 is a bidentate alkylene radical either unsubstituted or substituted by at least one ether oxygen atom with the proviso that R 2 has at least two carbon atoms linearly disposed between Si and R f 2 , and R f 2 is a perfluoroalkylene ether radical either unsubstituted or substituted by at least one ether oxygen atom.