Liquid-crystalline compounds

US7291367B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Peer Kirsch · Darmstadt, DE
• Alexander Hahn · Groß-Gerau, DE
• Eike Poetsch · Mühltal, DE
• Volker Meyer · Groß-Zimmern, DE
• Michael Heckmeier · Bensheim, DE
• Melanie Klasen-Memmer · Heuchelheim, DE
• Georg Luessem · Petershausen, DE
• Christian Hock · Mainaschaff, DE

Key dates

• Filing date: Nov 17, 2003
• Grant date: Nov 6, 2007
• Expiry date: Nov 17, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to liquid-crystalline compounds of the formula (I) in which R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, a, b and c have the meanings indicated in Claim 1, and to liquid-crystalline media comprising at least one compound of the (I) and to electro-optical displays containing a liquid-crystalline medium of this type.