Liquid-crystal mixtures, process for their preparation and their use

US5827449A · kind A · utility

Assignee

• Consortium für elektrochemische Industrie GmbH · DE

Inventors

• Eckhard Hanelt · Geltendorf, DE
• Christian Schierlinger · Julbach, DE
• Franz-Heinrich Kreuzer · Martinsried, DE

Key dates

• Filing date: Apr 15, 1997
• Grant date: Oct 27, 1998
• Expiry date: Apr 15, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/023
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Liquid-crystalline materials having a cholesteric phase with a pitch of less than 400 nm, comprising a) liquid-crystalline organosiloxanes containing dianhydrohexitol derivatives as chiral groups, and b) chiral monomeric additives which induce the same helicality as the respective liquid-crystalline organo-siloxanes.