Platelet-shaped pigments
AssigneeCiba Specialty Chemicals Corporation
InventorPatrice Bujard
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Abstract
The present invention relates to platelet-shaped pigments comprising (a) a layer obtained by calcination of a layer comprising SiOz wherein 0.03≦z≦2.0 and a metal, to a process for the production thereof, and to the use thereof in paints, text ink-jet printing, cosmetics, coating compositions, plastics, printing inks and in glazes for ceramics and glass. The aforementioned process makes available platelet-shaped pigments having a high degree of planeparallelism and a defined thickness in the range of ±10%, preferably ±5%, of the average thickness.
Claims20
A platelet-shaped pigment the particles of which generally have a length of from 2 μm to 5 mm, a width of from 2 μm to 2 mm and a thickness of from 20 nm to 1.5 μm and also a ratio of length to thickness of at least 2:1, comprising
- (a) a layer obtained by calcination in a non-oxidizing atmosphere at a temperature above 600° C. of a composite layer comprising a matrix of SiOz wherein 0.03≦z≦2.0 and embedded therein a metal.
Dependencies are inferred from the claim text.