SURFACE-TREATING AGENT FOR FORMATION OF PHOTOCATALYST COATING FILM AND FORMATION OF PHOTOCATALYST COATING FILM USING THE SAME SURFACE TREATING AGENT

摘要

PROBLEM TO BE SOLVED: To form a photocatalyst coating film capable of exhibiting hydrophilic property on the existing member surface to which stain is attached. ;SOLUTION: A surface treating agent containing ≥0.05 wt.% and ≤20 wt.% colloidal silica, ≥0.0001 wt.% and ≤0.1 wt.% cationic surfactant and/or amphoteric surfactant is applied to the surface of the existing member. Thereby, silica particles are deposited on the surface of the existing member to hydrophilize the surface. Then, a photocatalyst coating solution is applied to the hydrophilized surface to provide the objective photocatalyst layer excellent in binding force to the member surface.;COPYRIGHT: (C)1999,JPO