Patent ID: 8633288

Claim:
A compound represented by formula: (Rf-Q-X) s —Z; wherein Rf is selected from the group consisting of: Rf a —(O) r —CHF—(CF 2 ) n —; [Rf b —(O) t —C(L)H—CF 2 —O] m —W—; CF 3 CFH—O—(CF 2 ) p —; CF 3 —(O—CF 2 ) z —; and CF 3 —O—(CF 2 ) 3 —O—CF 2 —; Q is selected from the group consisting of —C(O)O − + NH(R′) 2 —, —C(O)—N(R′)—, and —C(O)—O—, wherein R′ is selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms; X is selected from the group consisting of alkylene, arylalkylene, and poly(alkyleneoxy), wherein alkylene and arylalkylene are each optionally interrupted by at least one functional group independently selected from the group consisting of ether, amine, ester, amide, carbamate, and urea; Z is selected from the group consisting of an ammonium group, an amine-oxide group, an amine, a carboxylate, a sulfonate, a sulfate, phosphate, a phosphonate, and an amphoteric group, with the proviso that when X is alkylene having at least 10 carbon atoms, Z may also be hydrogen, and with the further proviso that when X is poly(alkyleneoxy), Z may also be selected from the group consisting of hydroxyl and alkoxy; Rf a and Rf b independently represent a partially or fully fluorinated alkyl group having from 1 to 10 carbon atoms and optionally interrupted with at least one oxygen atom; L is selected from the group consisting of F and CF 3 ; W is selected from the group consisting of alkylene and arylene; r is 0 or 1, wherein when r is 0, then Rf a is interrupted with at least one oxygen atom; s is 1 or 2, wherein when s is 2, then Z is selected from the group consisting of an ammonium group, a phosphate, and a phosphonate; t is 0 or 1; m is 1, 2, or 3; n is 0 or 1; each p is independently a number from 1 to 6; and z is a number from 2 to 7.