WATER-REPELLENT SUBSTRATE AND PROCESS FOR PRODUCTION THEREOF

摘要

A water-repellent substrate provided with a surface having a large water contact angle which can withstand wear. A process for the production of a water-repellent substrate, characterized by forming, on at least one side of a substrate, an undercoat layer which comprises both the following aggregates (A) of metal oxide fine particles and a metal oxide type binder (with the proviso that the metal oxide type binder is a component formed from a binder material containing a metal compound (B) which can be converted into a metal oxide via hydrolytic condensation or pyrolysis) and which has an uneven surface, and then forming a water-repellent layer on the undercoat layer.  Aggregates (A) of metal oxide fine particles: aggregates which are each composed of metal oxide fine particles having a mean primary particle diameter of 10 to 80nm and which have a mean aggregate particle diameter of 100 to 1200nm.