Polymerizable liquid-crystalline compounds

US5833880A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl Siemensmeyer · Bischofswerda, DE
• Karl-Heinz Etzbach · Bischofswerda, DE
• Paul Delavier · Ludwigshafen, DE
• Frank Meyer · Mannheim, DE

Key dates

• Filing date: Aug 23, 1996
• Grant date: Nov 10, 1998
• Expiry date: Aug 23, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/0448
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Mixtures of liquid-crystalline compounds comprising at least two different substances of the formula I ##STR1## where Z.sup.1 and Z.sup.2, independently of one another, are polymerizable groups, PA1 Y.sup.1 and Y.sup.2, independently of one another, are each a direct bond, --O--, --COO--, --OCO-- or --S--, PA1 A.sup.1 and A.sup.2, independently of one another, are spacers, and PA1 R.sup.1, R.sup.2 and R.sup.3 are conventional substituents, PA1 and novel compounds of the above formula where at least two of Z.sup.1, Z.sup.2, Y.sup.1, Y.sup.2, A.sup.1 and A.sup.2 are not identical, are described. The novel mixtures and compounds are suitable, inter alia, as base material for color-effect materials and piezomaterials, preferably in chirally doped form.