Pigments

US8524261B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Christoph Schmidt · Kriftel, DE
• Sabine Schoen · Darmstadt, DE

Key dates

• Filing date: Oct 26, 2010
• Grant date: Sep 3, 2013
• Expiry date: Oct 26, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/102
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

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.