Dyes for use in liquid crystal mixtures

US4466899A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Ditter · Heidelberg, DE
• Karl-Heinz Etzbach · Bischofswerda, DE
• Dieter Horn · Heidelberg, DE
• Manfred Patsch · Monsheim, DE
• Heinz Eilingsfeld · Bischofswerda, DE

Key dates

• Filing date: Jan 4, 1982
• Grant date: Aug 21, 1984
• Expiry date: Jan 4, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/603
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The use of a dye of the general formula I ##STR1## where R is a heterocyclic radical, X is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto and Y is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto, and the ring A can be additionally substituted, in an electro-optical display containing liquid crystals, and a liquid-crystal mixture containing a dye of the general formula in claim 1.