Liquid-crystalline medium

US5389289A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Bernhard Rieger · Langenau, DE
• Hans-Adolf Kurmeier · Seeheim-Jugenheim, DE
• Eike Poetsch · Mühltal, DE
• Herbert Plach · Darmstadt, DE
• Ekkehard Bartmann · Langen (Hessen), DE

Key dates

• Filing date: Feb 24, 1994
• Grant date: Feb 14, 1995
• Expiry date: Feb 24, 2014

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 essentially comprising a) 5-65% by weight of a component A, comprising two or more compounds selected from group A: ##STR1## b) 20-95% by weight of a component B comprising two or more compounds selected from group B: ##STR2## and c) 0-40% by weight of a component C, comprising one or more compounds having a clearing point above 170.degree. C., where R, X and Y each, independently of one another, have the following meanings: PA0 R is in each case alkyl, oxaalkyl, haloalkyl or alkenyl having up to 7 carbon atoms, PA0 X is F, Cl, CHF.sub.2, CF.sub.3, OCHF.sub.2 or OCF.sub.3, and PA0 Y is H, F or Cl.