PHOTOCATALYTIC COATING COMPOSITION AND SUBSTRATE HAVING COATING FILM

摘要

It is intended to provide a photocatalytic coating composition capable of forming a coating film which is excellent in antifouling properties and durability as well as in flexibility, hardness and transparency. A photocatalytic coating composition wherein a metal oxide having a photocatalytic function is blended with a binder and dispersed therein and a solvent is further added so that the binder is dissolved in the solvent. As the binder, use is made of one containing an ion exchange resin comprising a perfluorosulfonic acid-based ion exchange resin, a perfluorocarboxylic acid-based ion exchange resin or a mixture of them and a silane compound selected from an alkoxysilane, a hydrolyzate thereof and a condensed product of the same.