WATER- AND OIL-REPELLENT COATING FILMS

摘要

The present invention provides a coating film having excellent stain resistance, water- and oil-repellency, chemical resistance and weather resistance as well as a method for preparing the coating film. The coating film satisfies the following requirements (i) and (ii) as to the atomic concentrations of silicon and fluorine present at its surface:2.1 <= NA(Si(90°)) <= 25.8 (i) 2.0 <= NA(F(90°)) <= 32.7 (ii).The coating film is also characterized by depth distributions of Si and F; Si is localized near the surface, and the concentration of F increases with receding from the surface. The coating film can be formed from a composition comprising a silicone-containing fluorine copolymer.