Effect pigments

US7691196B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Gerhard Pfaff · Mainburg, DE
• Johann Dietz · Dietzenbach, DE
• Sabine Schoen · Darmstadt, DE
• Doreen Warthe · Griesheim, DE

Key dates

• Filing date: Jun 7, 2007
• Grant date: Apr 6, 2010
• Expiry date: Jun 7, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2911
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed are yellowing-stable, silver-white effect pigments having high whiteness based on synthetic mica flakes and to the use thereof in paints, lacquers, printing inks, plastics, button pastes, ceramic materials, glasses, for coloring seed, as dopant in laser markings of plastics and papers, as additive for laser welding of plastics, as additive for coloring in the foods and pharmaceuticals sectors and in cosmetic formulations, and for the preparation of pigment compositions and dry preparations.