Liquid-crystalline medium

US6066268A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Hideo Ichinose · Yokohama, JP
• Yuka Ikedo · Yokohama, JP
• Yasuyoshi Namiki · Yokohama, JP
• Shinji Nakajima · Yokohama, JP
• Akiko Takashima · Soma, JP
• Kazuaki Tarumi · Seeheim-Jugenheim, DE
• Brigitte Schuler · Großostheim, DE
• Volker Reiffenrath · Roßdorf, DE

Key dates

• Filing date: Aug 28, 1998
• Grant date: May 23, 2000
• Expiry date: Aug 28, 2018

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 ##STR1## and at least one compound of formula II ##STR2## wherein R.sup.1 is alkyl or alkoxy with 1 to 8 C atoms or alkenyl with 2 to 7 C atoms, PA1 R.sup.2 is alkenyl with 2 to 7 C atoms, PA1 R.sup.3 and R.sup.4 are each independently alkyl or alkoxy with 1 to 8 C atoms, ##STR3## m is 0 or 1.