Stabilized complex ligands and their use in liquid crystal displays

US5445762A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Javier Manero · Frankfurt, DE
• Norbert Rosch · Frankfurt am Main, DE

Key dates

• Filing date: Jan 18, 1994
• Grant date: Aug 29, 1995
• Expiry date: Jan 18, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133711
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Decomposition-sensitive complex ligands can be stabilized by derivatizing them with the aid of bulky secondary or tertiary carboxylic acids or sulfonic acids. These stabilized derivatives can be added to alignment layers and liquid-crystal mixtures and increase the contrast and brightness in the FLC display.