| 摘要 |
PROBLEM TO BE SOLVED: To produce a base material provided with a highly durable photocatalyst film which concurrently has photocatalytic activity, wear resistance and a chemical resistance by setting the ratios (wt.%) of the contents of the constituents, i.e., ZrO2, SiO2 and crystalline TiO2 in the photo catalyst film to values within specified ranges, respectively. SOLUTION: This base material is provided with a photocatalyst film formed by coating the surface of the base material with a coating liquid that is obtained by dispersing TiO2 crystals into a coating film forming component comprising ZrO2 and SiO2, wherein, in the photocatalyst film, the content ratio of the constituent ZrO2 used in the form of zirconium chloride, zirconium oxychloride, a chlorine-containing zirconium alkoxide, or the like, is set to 25-60 wt.%; the content ratio of the constituent SiO2 used in the form of an alkoxysilane such as tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane or methyltriethyoxysilane, is set to 15-50 wt.%; and the content ratio of the constituent TiO2 crystals is set to 25-45 wt.%. Thus, the objective base material provided with a highly durable photocatalyst film which concurrently has photocatalytic activity with respect to antifouling properties, hydrophilicity, or the like, wear resistance and chemical resistance, can be produced.
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