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Substrate with a photocatalytic coating

  • US 6,720,066 B2
  • Filed: 09/05/2002
  • Issued: 04/13/2004
  • Est. Priority Date: 03/05/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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