Patent ID: 8022238

Claim:
A compound of Formula 1 R f -A-OP(O)(O − M + )(OROH) Formula 1 wherein R f is a C 2 to C 6 linear or branched perfluoroalkyl optionally interrupted by one, two or three ether oxygen atoms; A is (CH 2 CF 2 ) m (CH 2 ) n —, (CH 2 ) o SO 2 N(CH 3 )(CH 2 ) p —, O(CF 2 ) q (CH 2 ) r —, or OCHFCF 2 OE-; m is 0 to 4; n, o, p, and r are each independently 2 to 20; q is 2; E is a C 2 to C 20 linear or branched alkyl group optionally interrupted by oxygen, sulfur, or nitrogen atoms; a cyclic alkyl group, or a C 6 to C 10 aryl group; M is H or a Group I metal or an ammonium cation (NH x R 2 y ) + wherein R 2 is a C 1 to C 4 alkyl, x is 0 to 4, y is 0 to 4 and x+y is 4; and R is a C 2 to C 60 linear or branched alkyl group optionally interrupted by hetero atoms selected from the group consisting of an oxygen, sulfur, or nitrogen atom; a cyclic alkyl; or a C 6 to C 10 aryl; provided that when R is greater than 8 carbons, the ratio of hetero atoms to carbon atoms is at least 1:2.