PREPARATION PROCESS FOR A COMPOSITE MATERIAL HAVING A HYDROPHILIC PHOTOCATALYTIC SURFACE, A PHOTOCATALYTIC HYDROPHILIC COMPOSITE MATERIAL, AND A PHOTOCATALYTIC HYDROPHILIC COATING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a composite material having a hydrophilic photocatalytic surface which is well workable and highly adhesive, and a preparation process therefor. SOLUTION: A composite material having a hydrophilic photocatalytic surface and a preparation process therefor, which comprises preparing a substrate, covering the surface of the substrate with an adhesive layer, and coating the surface of the adhesive layer with a photocatalytic coating composition comprising a photocatalytic material and an organic solvent which has a solubility parameter of from 9 to 14.8, thereby forming a surface layer exhibiting a hydrophilic nature in response to the light excitation of the photocatalytic material.