Process for dyeing and printing cellulose fibres

US4255151A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Hederich
• Gunter Gehrke
• Robert Kuth · Cologne, DE
• Werner Kuhnel · Uttenreuth, DE

Key dates

• Filing date: Oct 4, 1979
• Grant date: Mar 10, 1981
• Expiry date: Oct 4, 1999

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P3/6041
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In order to dye and print cellulose fibres swollen with water-miscible swelling agents or mixed fibres containing these fibres, the fibres are treated with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula ##STR1## wherein R denotes hydrogen or optionally substituted alkyl, aryl or acyl, PA1 Hal denotes chlorine or bromine, PA1 n denotes a number from 0 to 2 and the ring B can optionally be further substituted or fused, with the proviso that if R denotes hydrogen or methyl, n must be >0 and/or B must be further substituted, and the dyestuffs are fixed by heat treatment.