Multilayer pearl luster pigment based on an opaque substrate

US6280520A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Stephanie Andes · Hanau, DE
• Dieter Bruckner · Darmstadt, DE
• Gerald Fuchs-Pohl · Weiterstadt, DE
• Matthias Kuntz · Seeheim-Jugenheim, DE
• Gerhard Pfaff · Mainburg, DE
• Reiner Vogt · Darmstadt, DE

Key dates

• Filing date: Apr 19, 1999
• Grant date: Aug 28, 2001
• Expiry date: Apr 19, 2019

Classification

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

Abstract

Multilayer pearl luster pigment based on an absorbing platelet-shaped substrate which is coated with alternating layers of a material of low refractive index and a material of high refractive index, or with a metal, the difference in the refractive indices being at least 0.1.