Liquid compositions of fiber-reactive azo dyes

Details Liquid compositions of fiber-reactive azo dyes Liquid compositions of fiber-reactive azo dyes

D - Textiles, Paper

06

P

8/19, 8/45

D06P 1/38 (2006.01) C09B 62/006 (2006.01) C09B 67/26 (2006.01)

Patent

CA 1090055

Abstract of the disclosure: Concentrated dyeing compositions containing up to 45% by weight of one or more metal-free or metal complex azo dyestuffs containing one or more sulfo groups and one or more reactive groups, and containing buffer substances and having a pH of from 3 to 7, which may easily be prepared by diazotization and coup- ling of stiochiometrical amounts of a diazotizable amino com- pounds with a stoichiometrical amount of a nitrite and with the provise that at least the diazo or coupling component contain at least one free acid group, such as sulfo group; these compositions are salt-free or practically salt-free and are very well suitable for the preparation of usual dyeing liquors and printing pastes.

244528

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