Multilayered luster pigments

US7060126B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Stephanie Andes · Hanau, DE
• Gerald Fuchs-Pohl · Weiterstadt, DE
• Martin Friz · Darmstadt, DE
• Gerhard Pfaff · Mainburg, DE
• Siegfried Raabe · Griesheim, DE
• Michael Uhlig · Darmstadt, DE

Key dates

• Filing date: Jun 12, 2002
• Grant date: Jun 13, 2006
• Expiry date: Nov 13, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of ≦1.8, and a colorless dielectric layer of a material with a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.