Patent ID: 6465088
Filing Date: 2002-10-15
Classification: B01J,C03C,C04B,C09D,C23C,H01J,Y10T

Abstract:
A coated substrate prepared by a process comprising:(a) preparing a substrate for deposition with a coating, wherein the coating comprises crystallized particles of an oxide of a metal A having photocatalytic properties, a mineral binder comprising at least one oxide of a metal B having photocatalytic properties, optionally at least one oxide of a metal M devoid of photocatalytic properties, and optionally at least one silicon oxide; (b) depositing the coating onto a surface of the substrate, by depositing the coating from liquid-phase dispersions containing oxides of the metals A and B, optionally the oxide of metal M and optionally the silicon oxide, in a relative proportion by weight of the metals and Si given by A/(B+M+Si), the relative proportion ranging from 60/40 to 40/60; and (c) allowing the coating to set; to provide the coated substrate, wherein the coating comprises crystallized particles of the oxide of metal A having photocatalytic properties incorporated into the coating using an at least partially crystallized mineral binder comprising the oxide of metal B also having photocatalytic properties in the crystallized state, optionally at least one oxide of a metal M devoid of photocatalytic properties and optionally a silicon oxide, wherein the coating has a porosity of between 45% and 65%.