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Substrate with a self-cleaning coating

  • US 20050221098A1
  • Filed: 04/16/2003
  • Published: 10/06/2005
  • Est. Priority Date: 04/17/2002
  • Status: Abandoned Application
First Claim
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1. A substrate (1), optionally transparent or optionally essentially transparent, comprising a material selected from glass;

  • one or more polymers;

    a ceramic substrate;

    a glass-ceramic substrate;

    a substrate made of an architectural material;

    a substrate made of an architectural material of the type comprising a wall render, concrete slab or block;

    architectural concrete;

    roof tile;

    material of cementitious composition;

    terracotta;

    slate;

    stone;

    metal;

    a mineral fibrous substrate;

    a fibrous substrate based on glass of the insulation mineral wool type or reinforcement glass yarns;

    or combinations thereof; and

    comprising on at least part of its surface a first coating (2), comprising a layer, or several stacked layers, based on an at least partly oxidized derivative of silicon, selected from silicon dioxide, substoichiometric silicon oxides and a silicon oxycarbide, oxynitride or oxycarbonitride, and wherein said first coating (2) exhibits hydrophilicity and is surmounted by a second coating (3) having photocatalytic properties, and which comprises at least partly crystallized titanium oxide, said second coating (3) having a discontinuous/permeable structure.

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