Patent ID: 7060771

Claim:
A fluorine-containing copolymer comprising: a first unit derived from an α-trifluoromethyl acrylic ester represented by the following general formula (1); and a second unit derived from a vinyl ether that is selected from the group consisting of propyl vinyl ether, isopropyl vinyl ether, sec-butyl vinyl ether, t-butyl vinyl ether, pentyl vinyl ether, isoamylcyclohexyl vinyl ether, hexyl vinyl ether, phenyl vinyl ether, decyl vinyl ether, methylcyclokexyl vinyl ether, benzyl vinyl ether, phenethyl vinyl ether, tolyl vinyl ether, a fluoroalkyl vinyl ether, a hydroxyl group-containing vinyl ether, an epoxy group-containing vinyl ether, a β-ketoester group-containing vinyl ether, and a hydrolyzable group-containing and silicon-containing vinyl ether, where R 1 an organic group containing at least one fluorine atom, wherein the vinyl ether is selected from the group consisting of a fluoroalkyl vinyl ether, a hydroxyl group-containing vinyl ether, an epoxy group-containing vinyl ether, a β-ketoester group-containing vinyl ether, and a hydrolyzable group-containing and silicon-containing vinyl ether.