A protective coating composition, coated substrate and method for protecting a substrate (I)

摘要

A coated substrate including a substrate including a treated layer, a photocatalytic layer, and a protective layer for impeding photocatalyst derived degradation of the treated layer, the protective layer being provided between the 5 photocatalytic layer and the treated layer, the protective layer comprising colloidal particles distributed in a matrix comprised at least partly of an organosilicon phase which is oxidisable by the reactive oxygen species to form a non-volatile inorganic phase, wherein the organosilicon phase includes a surfactant incorporating an organosilicon component.