Pigments
AssigneeMerck Patent GmbH
InventorsChristoph Schmidt, Sabine Schoen
Life of this patent
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Abstract
The present invention relates to inorganic spherical pigments which are based on spherical particles having a particle diameter of 0.1-100 μm and are coated on the surface with agglomerates selected from the group ZrO2, ZnO, Al2O3, TiO2, Fe2O3, Fe3O4, FeOOH and BaSO4 or mixtures thereof, and are optionally coated with a further layer (2nd layer) comprising a metal oxide, lake or Berlin Blue, and to the use thereof in paints, coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, in cosmetic formulations, as tracer, as filler and for the preparation of pigment preparations and dry preparations.
Claims16
A pigment comprising spherical particles of magnesium silicate, aluminium silicate, alkali-metal aluminium silicates, alkaline-earth metal aluminium silicates or combinations thereof, having a particle diameter of 0.1-100 μm and coated on the surface with agglomerates of ZrO2, ZnO, Al2O3, TiO2, Fe2O3, Fe3O4, FeOOH, BaSO4 or mixtures thereof thereby forming a 1st layer, and optionally coated with a further layer comprising a metal oxide or metal-oxide mixture, a lake or Berlin Blue thereby forming a 2nd layer.
Dependencies are inferred from the claim text.