Pyridine derivatives in liquid crystalline medium useful for electrooptical display elements

US5204477A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Volker Reiffenrath · Roßdorf, DE
• Eike Poetsch · Mühltal, DE
• Volker Meyer · Groß-Zimmern, DE
• Herbert Plach · Darmstadt, DE

Key dates

• Filing date: Nov 21, 1990
• Grant date: Apr 20, 1993
• Expiry date: Nov 21, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3444
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to pyridine derivatives of the formula I ##STR1## wherein R.sup.1, A, Z, r, X, s and R.sup.2 have the meaning given in claim 1, and their use as components for liquid crystal media for electrooptical display elements based on the ECB effect.