Iron effect pigments

US6645286B2 · kind B2 · utility

Assignee

• Eckart GmbH & Co. KG · DE

Inventors

• Werner Ostertag · Havelsee, DE
• Stefan Trummer · Koblenzer Straße, DE
• Frank Henglein · Nuremberg, DE
• Klaus Greiwe · Lautenbächle, DE

Key dates

• Filing date: Mar 25, 2002
• Grant date: Nov 11, 2003
• Expiry date: Mar 25, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/61
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention is concerned with soft-magnetic iron effect pigments with metallic luster, which are produced by grinding reductively treated carbonyl iron powder, and which are passivated either during grinding or subsequent to the grinding. The products find application in the decorative and functional fields in paint and lacquer coatings, coloring of plastics, in printing, cosmetics, and glass and ceramics.