Patent ID: 8568886

Claim:
A fluorine-containing polymer free from a monomer having an amino group, comprising (a) a fluorine-containing monomer of the general formula: CH 2 ═C(—X)—C(═O)—Y—[—(CH 2 ) m —Z—] p —(CH 2 )—Rf (I) wherein X is a hydrogen atom, a methyl group, a fluorine atom, a chlorine atom, a bromine atom, a iodine atom, a CFX 1 X 2 group (wherein X 1 and X 2 is a hydrogen atom, a fluorine atom or a chlorine atom), a cyano group, a linear or branched fluoroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted benzyl group, or a substituted or unsubstituted phenyl group; Y is —O— or —NH—; Z is —S— or —SO 2 —; Rf is a fluoroalkyl group having 1 to 6 carbon atoms; m is from 1 to 10, n is from 0 to 10, and p is 0 or 1, (b) an alkoxy group-containing monomer of the general formula: CH 2 ═C(X′)—C(═O)—O—(RO) q —H (II) wherein X′ is a hydrogen atom or a methyl group; R is an alkylene group having 2 to 4 carbon atoms, in which a part or all of hydrogen atoms may be substituted with hydroxyl groups; and q is an integer of 2-50, and (c) a crosslinkable monomer which is di(meth)acrylate of the general formula: CH 2 ═C(X″)—C(═O)—O—(R″O) r —C(═O)—C(X″)═CH 2 (III) wherein each of X″ is a hydrogen atom or a methyl group; R″ is an alkylene group having 2 to 10 carbon atoms, in which a part or all of hydrogen atoms may be substituted with hydroxyl groups; and r is an integer of 1 to 50.