Biscationic azo dyes and intermediates therefor

US5424404A · kind A · utility

Assignee

• BASF SE

Inventors

• Manfred Ruske · Ludwigshafen, DE
• Udo Mayer · Bischofswerda, DE

Key dates

• Filing date: Jun 11, 1993
• Grant date: Jun 13, 1995
• Expiry date: Jun 11, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B44/105
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Biscationic azo dyes useful for dyeing or printing polymeric material have the formula ##STR1## where R.sup.1 is hydrogen or unsubstituted or phenyl-substituted C.sub.1 -C.sub.5 -alkyl, PA1 R.sup.2 is hydrogen or C.sub.1 -C.sub.5 -alkyl, PA1 R.sup.3 and R.sup.4 are independently of each other hydrogen or methyl, PA1 D is the radical of a diazo component, unsubstituted or substituted phenylene or a radical of the formula ##STR2## where Z is a bridge member, Y is hydrogen, C.sub.1 -C.sub.18 -alkyl, C.sub.2 -C.sub.6 -alkylene, xylidene or phenylene, PA1 An.sup..crclbar. is one equivalent of an anion, PA1 m is 1 or 2, and PA1 n is 1 or 2,