Liquid-crystalline medium

US5350535A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Bernhard Rieger · Langenau, DE
• Reinhard Hittich · Seeheim-Jugenheim, DE
• Volker Reiffenrath · Roßdorf, DE
• Herbert Plach · Darmstadt, DE

Key dates

• Filing date: Jun 10, 1991
• Grant date: Sep 27, 1994
• Expiry date: Jun 10, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3021
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which X is fluorine, chlorine, CF.sub.3, OCF.sub.3 or OCHF.sub.2, and R is alkyl, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms.