Process for preparing navy dyeings on polyester fibers using mixture of blue and red azo dyes

US4743269A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Haebler · Odenthal, DE
• Heinz Geiger · Bensberg, DE
• Hans Otten · London, CA
• Horst Brandt · Weiterstadt, DE

Key dates

• Filing date: Dec 16, 1986
• Grant date: May 10, 1988
• Expiry date: Dec 16, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/922
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Navy polyester dyeings which are produced by means of dyestuff mixtures based on azo dyestuffs from 2,4-dinitro-6-cyanoaniline and 3-acylamino-dialkylaminoanilines are distinguished by a very good wash fastness on using peroxide-containing domestic washing agents. Preferably the dyestuff formulations used contain a weakly acidic buffer system.