Ciba-geigy Corporation

Angelo D Casa

Peter Liechti

Dieter Werthemann

Wolfgang Schlenker

Max Dempfle

Visvanathan Ramanathan

Cellulosic textile materials can be dyed with disperse dyes from supercritical CO.sub.2 by treating the textile materials with an auxiliary that promotes dye uptake, typically polyethylene glycol.

Process for dyeing cellulosic textile material with disperse dyes

Polyester textile material can be dyed from supercritical CO.sub.2 with special disperse dyes.

Process for dyeing hydrophobic textile material with disperse dyes from

The dyes of the formula ##STR1## in which R.sub.1 is hydrogen, halogen or CF.sub.3 and R.sub.2 is substituted or unsubstituted alkyl, where R.sub.2 must not be ethoxycarbonylethyl if R.sub.1 is hydrogen are suitable for the dyeing of polyester material in red hues having very good lightfastness.

Azo dyes prepared using 2-alkylamino-3-cyano-4,6-diaminopyridines as

Disperse dyes containing a monoazo coupling component of the formula ##STR1## in which X is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, acylamino, halogen or a group of the formula --NH--CO--NHQ in which Q is hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl,

N-phenoxyalkylene anilines as coupling components

Disperse dyes suitable for dyeing textile material composed of polyester dyes of the formula ##STR1## in which D is the radical of a substituted or unsubstituted, homocyclic or heterocyclic diazo component belonging to the series comprising thienyl, thiazolyl, isothiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, benzothiazolyl, benzoisothiazolyl, pyrazolyl, imidazolyl or phenyl,

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Riehen, Switzerland

Angelo D Casa