Patent ID: 7160850

Claim:
A surfactant composition comprising one or more compounds of the formula: wherein R f is a C 2 –C 5 perfluoroalkyl group; R is a C 1 –C 4 alkyl or aryl group; Q is a divalent linking group selected from —CHO—, —CHO(C n H 2n )—, —CHO(C n H 2n O) p (C n H 2n )—, —CHS—, —CHS(C n H 2n )—, —CHS(C n H 2n O) p (C n H 2n )—, and —CHOC(O)(C n H 2n )—, in which p is an integer from 1 to 50; and Z is —COO − M + , —SO 3 − M + , —N + (R) 3 Y − , —N + (R) 2 (CH 2 ) n COO − M + , —N + (R) 2 (CH 2 ) n SO 3 − , —(CH 2 CH 2 O) n R′, —(CH(CH 3 (CH 2 O) Z R′, or —PO 3 2− M 2+ , in which n is an integer of 1 to 10, z is an integer from 0 to 10, and M is a hydrogen, metal ion, NH 4 , or a protonated amine; R′ is H or C n H 2n+1 ; and Y is a halide or a carboxylate.