Patent ID: 7166329

Claim:
Method of treating a substrate comprising applying to said substrate a composition to form a treated substrate wherein said substrate is selected from the group consisting of plastics, ceramics, and glass and said composition comprises a major amount of organic solvent and 0.05% by weight to 5% by weight of fluorochemical oligomer dispersed or dissolved in said organic solvent and said fluorochemical oligomer being represented by the general formula: X-M f n M h m M a r -G wherein X represents the residue of an initiator or hydrogen, M f represents units derived from fluorinated monomers; M h represents units derived from non-fluorinated monomers; M a represents units having a silyl group represented by the formula: wherein each of Y 4 , Y 5 , and Y 6 independently represents an alkyl group, an aryl group, or a hydrolyzable group; G is a monovalent organic group comprising the residue of a chain transfer agent; n represents a value of 1 to 100; m represents a value of 0 to 100; r represents a value of 0 to 100; and n+m+r is at least 2; with the proviso that at least one of the following conditions is fulfilled: (a) G is a monovalent organic group that contains a silyl group of the formula: wherein Y 1 , Y 2 , and Y 3 each independently represents an alkyl group, an aryl group, or a hydrolyzable group with at least one of Y 1 , Y 2 , and Y 3 representing a hydrolyzable group; or (b) r is at least 1 and at least one of Y 4 , Y 5 , and Y 6 represents a hydrolyzable group.