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

摘要

The lyotropic, liquid-crystalline, aqueous phase of a reactive dyestuff of the formula (I) wherein M(+) represents H(+) or an alkali metal cation (preferably Na(+), K(+) or Li(+)) and 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.