Cationic azo dyes based on aminobenzoic acid

US6048968A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl-Heinz Etzbach · Bischofswerda, DE
• Torsten Freund · Schifferstadt, DE
• Rainer Tresch · Frankenthal (Pfalz), DE

Key dates

• Filing date: May 5, 1999
• Grant date: Apr 11, 2000
• Expiry date: May 5, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0046
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Cationic azo dyes of the formula I ##STR1## where the variables are as defined in the specification, amines as their intermediates, processes for preparing them, their use for dyeing and printing natural or synthtic substrates, and their mixtures are described.