Polymerizable azo dyes with a thiophene structure

US5783649A · kind A · utility

Assignee

• BASF SE

Inventors

• Stefan Beckmann · Mannheim, DE
• Karl-Heinz Etzbach · Bischofswerda, DE
• Rudiger Sens · Ludwigshafen, DE

Key dates

• Filing date: Jun 10, 1996
• Grant date: Jul 21, 1998
• Expiry date: Jun 10, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/3614
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polymerizable azo dyes I ##STR1## in which R.sup.1 is an aryl group, PA1 R.sup.2 is cyano, C.sub.1 -C.sub.4 -alkoxycarbonyl or nitro, PA1 R.sup.3 and R.sup.4 are hydrogen, C.sub.1 -C.sub.12 -alkyl or C.sub.1 -C.sub.6 -alkoxy, PA1 R.sup.5 is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or C.sub.3 -C.sub.4 -alkenyl, PA1 R.sup.6 is hydrogen or methyl, PA1 Y is C.sub.2 -C.sub.10 -alkylene which can be interrupted by 1 to 3 nonadjacent oxygen atoms or imino or C.sub.1 -C.sub.4 -alkylimino groups, and PA1 W is oxygen, imino or C.sub.1 -C.sub.4 -alkylimino are used to prepare copolymers which show nonlinear-optical properties.