Pigment flakes

US6552102B2 · kind B2 · utility

Assignee

• MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

• Eike Poetsch · Mühltal, DE
• Gerhard Pfaff · Mainburg, DE
• Matthias Kuntz · Seeheim-Jugenheim, DE
• Stephan Derow · Griesheim, DE
• David Coates · Bishop's Stortford, GB

Key dates

• Filing date: Jul 3, 2001
• Grant date: Apr 22, 2003
• Expiry date: Jul 3, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31504
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Described are chiral liquid crystalline polymer materials and polymerizable compounds used for preparing them. The polymer materials can serve as a carrier material or are coated onto a carrier material. Also described are methods of making such materials and using them to make pigment flakes used in paints, printing inks, spray paints, cosmetic products, colored plastics, optical elements and security applications.