Liquid crystalline, partially hydrogenated oligo-1,4-phenylenes and dielectrics and electro-optical display elements containing them

US4331552A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Rudolf Eidenschink · Mainz, DE
• Ludwig Pohl · Darmstadt, DE
• Michael C. Romer · Rodgau, DE
• Fernando Del Pino · Quito, EC

Key dates

• Filing date: Dec 5, 1980
• Grant date: May 25, 1982
• Expiry date: Dec 5, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3021
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Partially hydrogenated oligo-1,4-phenylenes of the formula ##STR1## wherein n is 1 or 2, the rings A and B are identical or different and are trans-4-alkylcyclohexyl or 4-alkylcyclohex-1-enyl, and the alkyl groups in each case are of up to 10 carbon atoms, have valuable liquid crystalline properties.