PHOTOCATALYTIC COATING MATERIAL, PRODUCTION THEREOF, AND COATING FILM FORMED THEREFROM

摘要

PROBLEM TO BE SOLVED: To provide a titanium oxide-based photocatalytic coating material excellent in photocatalytic activity and transparency, its production process, and a coating film formed by applying the same. SOLUTION: This coating material comprises superfine-particle anatase titanium oxide having an average primary particle size of 0.01-0.1μm, an org. solvent, aβ-diketone, a titanate or aluminate coupling agent, and a silica sol. The content of the titaium oxide is 0.5-20wt.%; theβ-diketone is added in an amt. of 0.5-10.0wt.% of the titanium oxide; and the coupling agent is added in an amt. of 0.1-5.0wt.% of the titanium oxide. The material is prepd. by dispersing the titanium oxide in a solvent homogeneously to a high degree. The coating film is formed by applying the material to a substrate.