Patent ID: 7652117

Claim:
A compound of the formula wherein R f is where R f 1 is a monovalent perfluoroalkyl or a perfluorooxyalkyl group, or a divalent perfluoroalkylene or a perfluorooxyalkylene group, Q is a covalent bond, or a polyvalent alkylene group of valency z, X 2 is —O—, —NR 4 — or —S—, where R 4 is H or C 1 -C 4 alkyl, y is 1 or 2, and z is independently 1 or 2, R 1 is the residue of a polyisocyanate selected from multivalent aliphatic, alicyclic, or aromatic moiety, W is a water-solubilizing group-containing moiety of the formula W 1 —R 7 —X 2 —C(O)—NH—, where W 1 a water-solubilizing group selected from carboxylate, sulfate, sulfonate, phosphate, phosphonate, ammonium, quaternary ammonium, and mixtures thereof, —X 2 is —S—, —O—, or —NR 4 , where R 4 is R 4 is H or C 1 -C 4 alkyl; and R 7 is a divalent alkylene or arylene groups, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms and v is 1 or 2; R 2 is of the formula: wherein X 1 is —O— or —NR 4 —, where R 4 is H or C 1 -C 4 alkyl, R 3 is a polyvalent alkylene or arylene groups, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms; R 5 is a divalent alkylene group, said alkylene groups optionally containing one or more catenary oxygen atoms; Y is a hydrolysable group selected from a halide, a C 1 -C 4 alkoxy group, an acyloxy group or a polyoxyalkylene group, R 6 is a monovalent alkyl or aryl group, p is 1, 2 or 3, and q is 1 to 5, x and y are each independently at least 1, and z is independently 1 or 2.