Patent ID: 7638575

Claim:
A surface treatment agent comprising (1) a fluorine-containing polymer and (2) water and/or an organic solvent, characterized in that the fluorine-containing polymer comprises (A) repeating units derived from (a) a fluorine-containing compound of the formula: CH 2 ═C(—X)—C(═O)—Y—[—(CH 2 ) m -Z-] p —(CH 2 ) n -Rf (I) wherein X is a hydrogen atom or a methyl group; Y is —O— or —NH— Z is —S— or —SO 2 —; Rf is a perfluoroalkyl 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 provided that p is 1 when Y is —O—.