Patent ID: 7652116

Claim:
A compound of the formula wherein R f is 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 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 where W 1 is a water-solubilizing group selected from carboxylate, sulfate, sulfonate, phosphate, phosphonate, ammonium, quaternary ammonium, poly(oxyalkylene), and mixtures thereof, X 4 is —O—, —NR 4 — or —S—, where R 4 is H or C 1 -C 4 alkyl; and v is 1 or 2; R 2 is of the formula: 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; each R 5 is a divalent alkylene group, said alkylene groups optionally containing one or more catenary oxygen atoms; each X 1 is —O— or —NR 4 —, where R 4 is H or C 1 -C 4 alkyl, each R 3 is a polyvalent alkylene or arylene groups, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms; x and y are each independently at least 1, and z is independently 1 or 2.