Cholesteric layered material, and the production thereof

US6656543B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Peter Schuhmacher · Mannheim, DE
• Norbert Schneider · Schorndorf, DE
• Volker Richter · Neutraubling, DE
• Wolfgang Best · Freinsheim, DE
• Albert Kohl · Laumersheim, DE
• Peter Blaschka · Ludwigshafen, DE
• Claudia Sierakowski · Seeheim-Jugenheim, DE

Key dates

• Filing date: Nov 1, 2002
• Grant date: Dec 2, 2003
• Expiry date: Nov 1, 2022

Classification

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

Abstract

The present invention relates to novel cholesteric layered materials having the layer sequence A1/B/A2, where A1 and A2 are identical or different and each comprise at least one cholesteric layer, and B is at least one interlayer separating the layers A1 and A2 from one another, wherein layer B is an adhesive layer; cholesteric multilayered pigments which can be produced therefrom; a process for their production, and their use.