Nematic liquid crystalline substances

US4099856A · kind A · utility

Assignee

• VEB Werk fuer Fernsehelektronik · DE

Inventors

• Wolfgang Weissflog · Halle, BE
• Hermann Schubert · Linz, AT
• Horst Kresse · Halle, BE
• Adalbert Wiegeleben · Halle, BE
• Dietrich Demus · Halle, BE

Key dates

• Filing date: Jul 20, 1973
• Grant date: Jul 11, 1978
• Expiry date: Jul 20, 1993

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/2007
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

As the liquid crystal substance in electro-optical devices or as the stationary phase in gas chromatography is employed a compound of the formula ##STR1## in which R.sub.1 and R.sub.2 each is C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 COO-- or C.sub.n H.sub.2n+1 OCOO--, n being an integer of from 1 to 10, and R.sub.3 is Cl--, Br--, CH.sub.3 --, C.sub.2 H.sub.5 --, CH.sub.3 CO-- or CH.sub.3 OOC--.