Color effect pigment with a layer made of discrete metal particles, method for the production thereof and its use

US8067090B2 · kind B2 · utility

Assignee

• ECKART GmbH · DE

Inventors

• Ralph Domnick · Buckenhof, DE
• Georg Bauer · Koblenzer Straße, DE
• Christian Wolfrum · Erlangen, DE
• Hans-Jorg Kremitzl · Eckental, DE
• Thomas Klaumunzer · Forchheim, DE
• Thomas Schuster · Achern, DE

Key dates

• Filing date: Oct 18, 2006
• Grant date: Nov 29, 2011
• Expiry date: Jul 30, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2998
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a platelike color effect pigment having the following structure: a) a metallic reflective core; b) a spacer layer made of a dielectric material, and; c) an, all in all, semitransparent absorber layer comprising, in essence, discrete metal particles that have an average diameter of 1 to 100 nm and optionally at least one other protective layer.