Acid disazo dyestuffs containing a substituted thiophene middle component

US4180503A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dieter vor der Bruck · Bonn, DE
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: Sep 11, 1975
• Grant date: Dec 25, 1979
• Expiry date: Sep 11, 1995

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P1/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dyestuffs which in the free acid form correspond to the formula ##STR1## wherein A represents the radical of an aromatic carbocyclic or aromatic heterocyclic diazo component, PA1 B represents the radical of a carbocyclic or heterocyclic coupling component, PA1 X represents OH, --NHSO.sub.2 --R.sub.3, --N(R.sub.4)--alkylene-SO.sub.3 H, --N(R.sub.4)-arylene-SO.sub.3 H, --N(R.sub.4)-arylene--CH.sub.2 --SO.sub.3 H or --N(R.sub.4)-arylene-SO.sub.2 --NH-SO.sub.2 -R.sub.3 and N(R.sub.4)-alkylene-O-SO.sub.3 H, PA1 R.sub.1 represents alkyl, aryl, carbalkoxy or hydrogen, PA1 R.sub.2 represents carbalkoxy, carboxylic acid amide or cyano, PA1 R.sub.3 represents alkyl or aryl, PA1 R.sub.4 represents hydrogen or alkyl, PA1 m and n represent 0, 1 or 2, PA1 p represents 0 or 1 and PA1 m+n represent 1 or 2 are suitable for the dyeing of natural and synthetic fibre materials, particularly for the dyeing of polyamide fibre materials.