Patent ID: 7019092

Claim:
A fluorine-containing copolymer comprising: a. a first repeat unit derived from an ethylenically unsaturated compound containing a functional group having the structure: —X r (CH 2 ) q C(R f )(R f ′)OR a wherein R f and R f ′ are the same or different fluoroalkyl groups of from 1 to 10 carbon atoms, or taken together are (CF 2 ) n ; n is an integer from 2 to 10; X is selected from the group consisting of S, O, N, and P; q=0 and r=0, or q=1 and r=0 or 1; and R a is H or an acid- or base-labile protecting group; and b. a second repeat unit derived from CH 2 ═CRCO 2 CH 2 R″, wherein R″ is a fluoroalkyl group of 1 to 4 carbon atoms or a hydroxyalkyl group of 1 to 4 carbon atoms; and R is H, F, an alkyl group of 1 to 5 carbon atoms, or a fluoroalkyl group of 1 to 5 carbon atoms.