Patent ID: 7294731

Claim:
A perfluoropolyether silane of the formula: R f [—R 1 —C 2 H 4 —S—R 2 —Si(Y) x (R 3 ) 3-x ] y , wherein R f is a mono- or divalent perfluoropolyether group, R 1 is a covalent bond, —O—, or a divalent alkylene or arylene group, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms; R 2 is a divalent alkylene or arylene group, or combinations thereof, said alkylene groups optionally containing one or more catenary oxygen atoms; Y is a hydrolysable group, and R 3 is a monovalent alkyl or aryl group, x is 1, 2 or 3; and y is 1 or 2.