Liquid-crystalline medium

US6764723B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Seung Eun Lee · Seoul, KR
• Nobuo Kubo · Tokyo, JP
• Masahiro Iijima
• Hideo Ichinose · Yokohama, JP
• Yukiomi Tanaka · Darmstadt, DE
• Shinji Nakajima · Yokohama, JP
• Yasushi Sugiyama · Atsugi, JP
• Takanori Takeda · Nogi, JP

Key dates

• Filing date: Apr 22, 2002
• Grant date: Jul 20, 2004
• Expiry date: May 29, 2022

Classification

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

Abstract

The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I whereinR1 and R2 are independently of each other an alkyl, alkoxy or alkenyl group with 1 to 12 C atoms, it also being possible for one or more CH2 groups in these radicals to be replaced, in each case independently of one another, by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a manner that oxygen atoms are not linked directly to one another,Z is OCH2 or CH2O, andm is 0 or 1.