Ionophore-containing ferroelectric liquid crystal mixtures

US5167856A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Takamasa Harada · Oberursel, DE
• Norbert Rosch · Frankfurt am Main, DE
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: Apr 10, 1991
• Grant date: Dec 1, 1992
• Expiry date: Apr 10, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/582
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The occurrence of twist states in FLC displays can be suppressed by adding ionophores to FLC mixtures. Applicable ionophores are amides of the general formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 e.g. are alkyl, cyclohexyl, phenyl or benzyl and X is alkylene with --CH.sub.2 -groups being replaced by --O--, 1,2-phenylene or 1,2-cyclohexylene.