Colored and coated plateletlike pigments

US6630018B2 · kind B2 · utility

Assignee

• MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

• Gerd Bauer · Kleinostheim, DE
• Karl Osterried · Dieburg, DE
• Christoph Schmidt · Kriftel, DE
• Reiner Vogt · Darmstadt, DE
• Helge Kniess · Roßdorf, DE
• Michael Uhlig · Darmstadt, DE
• Norbert Schül · Heppenheim, DE
• Günther Brenner · Griesheim, DE

Key dates

• Filing date: Apr 15, 1994
• Grant date: Oct 7, 2003
• Expiry date: Apr 15, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2993
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to a platelet-shaped pigment having high luster and high covering power or high transparency, consisting of a transparent, inorganic, platelet-shaped matrix which can contain an additional constituent, characterized in that the additional constituent is a soluble or insoluble colorant and in that the matrix is coated at least on one side with one or more thin, transparent or semi-transparent reflective layers of metal oxides or metals to achieve the luster.