Macrocyclic compounds as component for ferroelectric liquid crystal mixtures

US5178792A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Takamasa Harada · Oberursel, DE
• Norbert Rosch · Frankfurt am Main, DE
• Peter Wegener · Königstein, DE

Key dates

• Filing date: Apr 10, 1991
• Grant date: Jan 12, 1993
• Expiry date: Apr 10, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/54
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A liquid crystal mixture composed of at least two components containing as one component a macrocyclic compound of the general formula (1) ##STR1## in which a, b, c, d, e, f, independently of one another, are an integer from zero to 4, a+b+c+d+e+f being greater than 7, and --A--, --B--, --C--, --D--, --E--, --F--, identical or different, are, for example, --CH.sub.2 --, --CH.dbd.CH--, --CO-- or --COO--, leads in FLC displays to the formation of a uniform alignment and avoids twist states, which is reflected in a significantly improved contrast.