Liquid-crystalline dielectric having a steep characteristic curve

US4410445A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Gunter Baur · Glückstadt, DE
• Bernd Scheuble · Glückstadt, DE
• Georg Weber · Langen (Hessen), DE

Key dates

• Filing date: Jun 22, 1981
• Grant date: Oct 18, 1983
• Expiry date: Jun 22, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/42
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Liquid crystalline dielectrics having steep characteristic curves comprise 5-85% by weight of at least one carboxylic acid ester of formula (I) EQU R.sub.1 --X--R.sub.2 (I) wherein X is --CO--O-- or --O--CO--, R.sub.1 is alkyl of 1-7 C atoms, R.sub.2 is ##STR1## and R is alkyl of 1-7 C atoms which can be the same or different from R.sub.1, and 95-15% by weight of at least one compound of the formulae (II) to (VI), ##STR2## wherein n is 1 or 2, Z is R', OR' or CN, R and R' being the same or different, and each being alkyl of 1-7 C atoms.