Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures

US4906401A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Rolf Dubal · Königstein, DE
• Claus Escher · Mühltal, DE
• Wolfgang Hemmerling · Pocking, DE
• Ingrid Muller · Niedernhausen, DE
• Dieter Ohlendorf · Liederbach, DE
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: Jul 12, 1989
• Grant date: Mar 6, 1990
• Expiry date: Jul 12, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3458
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The compounds of the general formula (I) ##STR1## are particularly highly suitable as components of smectic, liquid-crystal mixtures, the symbols having the following meaning: R.sup.1 and R.sup.2 denote identical or different, straight-chain or branched alkyl or alkenyl groups which can contain asymmetric carbon atoms, containing 2 to 16 carbon atoms, in which one or more non-adjacent --CH.sub.2 -- groups can be replaced by --O-- and/or --S--, --A and --B each denote group ##STR2## in which the radicals R.sup.1, R.sup.2, in each case, are situated at the phenylene part of --A, --B and m and n denote 0 or 1, but m+n is always zero or 1.