Patent ID: 6673433
Filing Date: 2004-01-06
Classification: B01J,C03C,C04B,C09D,C23C,Y10T

Abstract:
An antifouling material comprising:a substrate; and an inorganic layer which is mainly composed of an alkali silicate, said inorganic layer being fixed as the outermost layer of the antifouling material; the content of alkali metal in the inorganic layer being not less than 10% by weight as measured by X-ray photoelectron spectroscopy from the surface layer side and non-bridging oxygen being present in an amount satisfying an alkali metal elution from the inorganic layer of 0.001 to 80%, the inorganic layer having a surface which has a center line average roughness (Ra) of Ra<500 nm and having a thickness of not more than 5 &mgr;m, said inorganic layer containing the alkali metal and the non-bridging oxygen in an amount effective to remove contaminants, derived from an exhaust gas, adhered on the surface of the inorganic layer with running water alone to restore diffuse reflectance of the surface to not less than 75% of initial diffuse reflectance.