Esters in ferroelectric mixtures

US4871472A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Joachim Krause · Dieburg, DE
• Volker Reiffenrath · Roßdorf, DE
• Thomas Geelhaar · Mainz, DE

Key dates

• Filing date: Oct 9, 1987
• Grant date: Oct 3, 1989
• Expiry date: Oct 9, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3068
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula I ##STR1## wherein R.sup.1 and R.sup.2 each independently of one another are R, OR, OCOR, COOR or OCOOR, PA0 is alkyl with 1 to 15 C atoms, wherein one or more CH.sub.2 groups which are not adjacent and are not linked by O can also be replaced by --O--, --CO--, --O--CO--, --CO--O--, --CH--halogen, --CHCN-- and/or --CH.dbd.CH--, PA0 A.sup.1, A.sup.2 and A.sup.3 each independently of one another are 1,4-phenylene or trans-1,4-cyclohexylene, PA0 m, n and o are each 0 or 1, PA0 m+n+o is 0, 1 or 2, PA0 Z.sup.1 and Z.sup.2 each independently of one another are --CH.sub.2 --O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond and PA0 X is F, Cl, Br, I or CN, with the provisos given in claim 1, can be used as components of ferroelectric liquid crystal phases.