Patent ID: 6465388
Filing Date: 2002-10-15
Classification: B05D

Abstract:
A process for forming a photocatalytic film, said process comprising:an underlayer forming step for forming an uncured underlayer from a polymerizable and curable acrylic composition on a surface of a resinous base, wherein said polymerizable and curable acrylic composition is an ultraviolet polymerizable and curable acrylic composition which is polymerizable by ultraviolet radiation, and polymerizing said polymerizable and curable acrylic composition to convert said uncured underlayer into an underlayer having a hardness higher than that of said resinous base; an intermediate layer forming step for forming an uncured intermediate layer from a polymerizable and curable silicone composition on said uncured underlayer or on said underlayer to yield an uncured intermediate layer, and polymerizing said polymerizable and curable silicone composition to convert said uncured intermediate layer into an intermediate layer, said polymerizable and curable silicone composition being prepared mainly from a hydrolyzable tetrafunctional silane derivative, wherein the amount of said hydrolyzable tetrafunctional silane derivative in said polymerizable and curable silicone composition is more than 30% by mole based on the total mole amount of said polymerizable and curable silicone composition; and a photocatalytic layer forming step for forming a photocatalytic layer comprising a photocatalyst on said intermediate layer.