Pigment

US7799126B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Carsten Handrosch · Heilbad Heiligenstadt, DE
• Carsten LORENZ · Dresden, DE

Key dates

• Filing date: Apr 20, 2007
• Grant date: Sep 21, 2010
• Expiry date: Apr 20, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/29
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed are a pigment comprising a flake-form substrate, where natural and synthetic clay minerals are excluded as substrate, and an anion-binding layer, in particular comprising a layered double hydroxide, where the anion-binding layer comprises anion-forming organic, inorganic and/or organometallic colorants; and a process for the preparation of said pigment and to the use thereof in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings, and for the preparation of pigment compositions and dry preparations.