Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Edmond Ruhlmann

Athanassios Tzikas

Herbert Klier

Laszlo Fekete

Roger Lacroix

Bernhard Muller

Bernhard M Uller

Karlheinz Franke

A process for dyeing or printing cellulosic fiber materials, which comprises using at least one reactive dye of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, halogen, sulfo, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy,

Process for dyeing or printing cellulosic fibre materials and novel

Dye mixtures comprising at least one dye of formulae ##STR1## wherein A is hydrogen or a substituent, R and R.sub.1 are hydrogen or C.sub.1 -C.sub.4 alkyl, X is halogen and L is an aliphatic linking group containing 1 to 12 carbon atoms, are suitable for dyeing cellulosic fiber materials.

Dye mixtures, process for their preparation and their use

Described are compounds of formula ##STR1## which are suitable as fiber-reactive dyes for dyeing a wide range of fiber materials.

Azo reactive dyes, their preparation and use

Reactive dyes of the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 alkyl,

Asymmetrical reactive dyes containing two triazinyl radicals which are

Reactive dyes, processes for their preparation and their use

The invention describes a process for the preparation of concentrated aqueous, substantially salt-free solutions of aminotriazinyl reactive dyes, which process comprises starting from a dye which contains sulfo groups and one or more radicals capable of reaction with cyanuric halide, said dye being at least partly in the form of the ammonium salt, reacting said dye with cyanuric halide, in the presence of lithium hydroxide, and deionizing and concentrating the salt-containing synthesis solution by a membrane separation process. The so prepared mixed lithium/ammonium salts of the acid aminotriazinyl reaction dyes are readily water soluble and are suitable for the preparation of concentrated storage stable dye solutions.

Process for the preparation of concentrated aqueous, substantially

The reaction of cyanuric fluoride with amines to form monocondensation products is possible in high yields by subjecting the educts to rapid thorough mixing and then bringing the reaction to completion under plug flow conditions.

Process for the continuous reaction of cyanuric fluoride with

The invention relates to azo dyes of the formula ##STR1## in which R is hydrogen, an alkyl radical having 1 to 6 carbon atoms, which can contain --O-- and --S--members and can be further substituted, or a cycloalkyl radical, R.sub.1 is hydrogen or C.sub.1-4 -alkyl, D is an aryl radical and Pz is a pyrazolone radical, the azo dye of the formula (1) containing one and not more than one strongly acid group conferring solubility in water, their preparation and their use for dyeing and printing textile material.

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Saint-Louis, France

Edmond Ruhlmann