To provide a coating film-forming composition capable of forming a transparent photo-catalytic film having a high hardness and excellent in scratch resistance while maintaining the designing property and transparency of a base material by using a low cost wet method.
This photo-catalytic coating film-forming composition consists of a titanium compound of which particle surface is stabilized by 0.1-2.0 weight ratio chelating agent based on the titanium compound, having 1-100 nm mean particle diameter, a hydrolysate of a hydrolyzable silicon compound expressed by the general formula: SiX3(OSi)nX3 [wherein, (n) is 0 or 1-8 integer; X's are a halogen or a 1-8C alkoxy and may be the same or different] and a solvent, and has (30:70)-(90:10) ratio of titanium to silicon based on the converted values of TiO2 and SiO2 and ≤20 wt.% solid portion concentration in the whole composition.
SHIBATO MASAHIRO
SHIMOBUKIKOSHI MITSUHIDE
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