Defined oligomeric liquid-crystalline compounds having smectic liquid-crystalline phases

US5417884A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl-Heinz Etzbach · Bischofswerda, DE
• Karl Siemensmeyer · Bischofswerda, DE
• Detlev Joachimi · Krefeld, DE
• Carsten Tschierske · Bodenwerder, DE
• Olaf Agert · Sondershausen, DE

Key dates

• Filing date: Jul 6, 1993
• Grant date: May 23, 1995
• Expiry date: Jul 6, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3497
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Liquid-crystalline compounds of the formulae I and II; EQU Z.sup.1 -(X.sup.1 -R.sup.1 -y-M).sub.m I EQU Z.sup.2 -(X.sup.2 -R.sup.1 -Y-M).sub.n II where Z.sup.1 is the radical of an m-valent alcohol an m-valent acid or certain trivalent triazine derivatives; Z.sup.2 is an n-valent radical of a monocyclic or polycyclic aromatic compound; X.sup.1 is a chemical bond or -CO-; X.sup.2 is -O-, -S-, -CO-O-, -O-CO-, -SO.sub.2 -, -SO.sub.2 -O-, -O-SO.sub.2 -O-, -NR.sup.4- , -CO-NR.sup.4 -, -NR.sup.4 -O- or -CO-N<, where R.sup.4 is H or C.sub.1 -C.sub.8 -alkyl; m and n are 3 to 6; R.sup.1 is a C.sub.2 2-C.sub.20 -bridge having 2 to 12 bridging members, which may be interrupted by -O-, -S- or -NR.sup.4 -, each of these hetero units being separated by at least 2 carbon atoms; Y is a chemical bond, -O-, -S-, -CO-O-, -O-CO-, -NR.sup.4 -, -CO-NR.sup.4 - or -NR.sup.4 -CO.sup. -; M is a mesogenic group. These compounds are suitable for the production of optical and electro-optical data carriers and display elements.