Liquid-crystalline phase of an azo reactive dyestuff, and its use for the dyeing and printing of natural and synthetic substrates

US4443225A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Joachim Wolff · Odenthal, DE
• Karlheinz Wolf · Leverkusen, DE
• Jochen Koll · Odenthal, DE
• Reinhold Hornle
• Hans-Heinz Molls · Leverkusen, DE
• Volker Paulat · Monheim, DE

Key dates

• Filing date: Nov 23, 1982
• Grant date: Apr 17, 1984
• Expiry date: Nov 23, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/919
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The lyotropic, liquid-crystalline, aqueous phase of a reactive dyestuff of the formula ##STR1## wherein M.sym. represents H.sym. or an alkali metal cation (preferably Na.sym., K.sym. or Li.sym.) and PA1 R is a fibre-reactive grouping present in water at room temperature in a concentration of 10-25%, if appropriate in the presence of concentration-increasing additives and/or buffer substances, is highly suitable for preparing dyebaths and print pastes for application to natural and synthetic substrates, in particular cotton, wool, regenerated cellulose, paper and leather.