Process for dyeing and printing cellulose fibres

US4256460A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Oct 4, 1979
• Grant date: Mar 17, 1981
• Expiry date: Oct 4, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/918
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

For dyeing and printing cellulose fibres which have been 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 represents optionally substituted C.sub.1 -C.sub.6 -alkyl, cyclohexyl, C.sub.1 -C.sub.4 -alkoxy, phenyl, benzyl, phenylethyl, phenylpropyl or phenoxy, or chlorine or bromine, PA0 n represents 0, 1 or 2, PA0 one X represents OH and the other X represents NO.sub.2, NH.sub.2 or R'-CONH and R' represents optionally substituted C.sub.1 -C.sub.4 -alkyl or phenyl, and the dyestuffs are fixed by heat treatment.