Polymerizable liquid-crystalline compounds

US6136225A · kind A · utility

Assignee

• BASF SE

Inventors

• Frank Meyer · Mannheim, DE
• Karl Siemensmeyer · Bischofswerda, DE
• Karl-Heinz Etzbach · Bischofswerda, DE
• Peter Schuhmacher · Mannheim, DE

Key dates

• Filing date: Mar 2, 1998
• Grant date: Oct 24, 2000
• Expiry date: Mar 2, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3425
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polymerizable liquid-crystalline compounds of the formula I EQU Z.sup.1 --Y.sup.1 --A.sup.1 --Y.sup.3 --M--Y.sup.4 --A.sup.2 --Y.sup.2 --Z.sup.2 I where PA1 Z.sup.1 and Z.sup.2 are radicals containing reactive groups via which polymerization can be effected, PA1 Y.sup.1 -Y.sup.4 are a single chemical bond, oxygen, sulfur, --O--CO--, --CO--O--, --O--CO--O--, --CO--NR--, --NR--CO--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, where at least one of the groups Y.sup.3 and Y.sup.4 is --O--CO--O--, --O--CO--NR--, --NR--CO--O-- or --NR--CO--NR--, PA1 A.sup.1 and A.sup.2 are spacers having 2 to 30 carbon atoms in which the carbon chain may be interrupted by ether oxygen, thioether sulfur or by nonadjacent imino or C.sub.1 -C.sub.4 -alkylimino groups, PA1 M is a mesogenic group, PA1 R is C.sub.1 -C.sub.4 -alkyl, and compositions comprising them are distinguished by favorable liquid-crystalline phase-temperature ranges and can be used in optical display devices and in cholesteric liquid-crystalline colorants.