Liquid crystal phase of an azo reactive dyestuff and its use for dyeing and printing natural and synthetic substrates

US4309182A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jochen Koll · Odenthal, DE
• Volker Paulat · Monheim, DE
• Reinhold Hornle
• Hans-Heinz Molls · Leverkusen, DE
• Konrad Nonn

Key dates

• Filing date: Nov 19, 1980
• Grant date: Jan 5, 1982
• Expiry date: Nov 19, 2000

Classification

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

Abstract

Liquid finished formulations which are stable to storage and hydrolysis and are based on the lyotropic liquid crystal aqueous phase of the dyestuff of the formula ##STR1## which is present in water in a concentration of 23-35% at room temperature, are outstandingly suitable for the preparation of dyebaths and printing pastes for dyeing cotton, wool, regenerated cellulose, paper and leather.