Liquid-crystalline mixture

US5391319A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Michael Junge · Munich, DE
• Herbert Plach · Darmstadt, DE
• Alasdair Jelfs · Darmstadt, DE
• Michael Kompter · Riedstadt, DE

Key dates

• Filing date: Nov 17, 1993
• Grant date: Feb 21, 1995
• Expiry date: Nov 17, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A liquid-crystalline mixture comprising two or more compounds of the general formula I, ##STR1## in which R.sup.1 is straight-chain alkyl having 3, 5 or 7 carbon atoms, three or more compounds of the general formula II, ##STR2## in which R.sup.2 is straight-chain alkyl having 2 to 7 carbon atoms, three or more compounds of the general formula III, ##STR3## in which R.sup.3 and R.sup.4 are each independently alkyl or alkoxy with 1 to 10 carbon atoms, and two or more compounds of the general formula IV, ##STR4## in which R.sup.5 and R.sup.6 are each independently have one of the meanings indicated for R.sup.3 and m is 0 or 1. A "multibottle-system" comprising said mixture and an electrooptical display device based on the principle of the twisted nematic cell.