Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures

US5286409A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Rolf Dubal · Königstein, DE
• Claus Escher · Mühltal, DE
• Takamasa Harada · Oberursel, DE
• Wolfgang Hemmerling · Pocking, DE
• Gerhard Illian · Frankfurt am Main, DE
• Ingrid Muller · Niedernhausen, DE
• Mikio Murakami · Kakegawa, JP
• Dieter Ohlendorf · Liederbach, DE
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: Nov 6, 1991
• Grant date: Feb 15, 1994
• Expiry date: Nov 6, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/588
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are based on at least two mixture components of the general formula (I) and at least one carboxylate of the general formula (II), (III) or (IV). ##STR1## The mixtures have favorable properties for use in electrooptical display elements, such as high contrast, low melting point and short switching times.