Effect pigments

US8647429B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Sabine Melson · Mainz, DE
• Volker Wilhelm · Bensberg, DE
• Ulrich Schoenefeld · Bickenbach, DE

Key dates

• Filing date: Feb 2, 2011
• Grant date: Feb 11, 2014
• Expiry date: Feb 2, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/106
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.