3-thienylazo dyes with a gamma-acid coupler

US4711954A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Holger Heidenreich · Cologne, DE
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: Mar 4, 1986
• Grant date: Dec 8, 1987
• Expiry date: Mar 4, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/0059
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyestuffs which contain at least one water-solubilizing group and have the formula ##STR1## wherein K stands for the radical of a coupling component, PA1 R.sub.1 stands for CN, COOX, CONXY or COZ, PA1 R.sub.2 stands for hydrogen, halogen, CN, alkyl or aryl, PA1 R.sub.3 stands for alkyl or aryl, PA1 X stands for H, alkyl, alkenyl, cycloalkyl, aryl or aralkyl and PA1 Y stands for H or alkyl and PA1 Z stands for alkyl or aryl, are highly suitable for dyeing polyamide fibres. The resulting dyeings are distinguished by good all-round fastness properties.