| 摘要 |
<p>The use of interference pigments (A), based on a refractory, platelet-form substrate (I) coated with a layer (II) of titanium dioxide (TiO 2), is claimed as photocatalytically active material in engobes and glazes for roof tiles. Independent claims are included for: (1) photocatalytically active engobes and glazes for roof tiles, which contain (A); (2) the production of the engobes or glazes, by homogeneously mixing the base composition (B) for the engobe or glaze with (A); applying a single- or multilayer coating of the mixture onto the surface(s) of a fired or non-fired roof tile, so that at least the outermost coating layer contains (A); and firing the coating, together with the tile, at 400[deg] C or more; and (3) photocatalytically active roof tiles, having an engobe or glaze obtained by the process on at least one surface.</p> |
