Patent ID: 7745653

Claim:
A compound of the formula wherein R f is a fluorine-containing group of the formula: wherein R f 1 is a monovalent perfluorooxyalkyl group, or a divalent a perfluorooxyalkylene group comprising one or more perfluorinated repeating units selected from the group consisting of —(C n F 2n O)—, —(CF(Z)O)—, —(CF(Z)C n F 2n O)—, —(C n F 2n CF(Z)O)—, —(CF 2 CF(Z)O)—, and combinations thereof, wherein n is 1 to 4 and Z is a perfluoroalkyl group, a perfluoroalkoxy group, or perfluorooxyalkyl group, Q is a covalent bond, or a divalent alkylene or arylene group, said alkylene optionally containing one or more catenary heteroatoms, X 2 is —O—, —NR 4 — or —S—, where R 4 is H or C 1 -C 4 alkyl, z is 1 or 2, and v is 0 or 1; R l is a covalent bond, a polyvalent alkylene or arylene group, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen or nitrogen atoms: R 2 is of the formula: wherein X 2 is —O, —S—or —NR 4 —, where R 4 is H or C 1 -C 4 alkyl, R 5 is C 1 -C 4 alkyl, or —R 6 —Si(Y p )(R 7 ) 3-p or (R f ) x —R 1 —X 2 —C(O)—CH 2 CH 2 —; R 6 is a divalent alkylene group, said alkylene groups optionally containing one or more catenary oxygen atoms; Y is a hydrolysable group, R 7 is a monovalent alkyl or aryl group, p is 1, 2 or 3, and x and y are each independently at least 1, and z is 1 or 2.