Bayer Aktiengesellschaft

Jochen Westphal

Hermann Henk

Gerhard Wolfrum

Klaus Wunderlich

Herbert Hugl

Karl H Schundehutte

Klaus Kunde

Winfried Mennicke

Karl-Arnold Weber

Colorants are obtained by reacting a dyestuff which is free from ionic groups and has.gtoreq.2 NH.sub.2 groups which are preferably arranged in such a manner that they do not participate in the resonance of the chromophore with such an amount of a (cyclo)aliphatic diisocyante so as to form an adduct that still contains at least two free NCO groups, and subsequently reacting this adduct with a (cyclo)aliphatic diamine, to form an adduct suitable for dyeing and pigmenting macromolecular substances, in particular for coloring PUR-based paints, coatings and laminates.

Colorants obtained by reacting a NH.sub.2 -containing dyestuff with a

Sulfo-group-containing trisazo dyestuffs

Dyestuffs of the formula ##STR1## wherein R.sub.1 represents alkyl or aryl,

Azo dyestuffs

Dyestuffs of the formula ##STR1## wherein R.sub.1 represents a non-ionic substituent, R.sub.2 and R.sub.3 represent hydrogen, alkyl, acyl or aryl and wherein the two benzene rings A and B can in addition also be substituted by the non-ionic substituents as well as their preparation and their use for dyeing and printing fiber materials containing nitrogen, especially fiber materials consisting of polyamides, to give level orange to red dyeings with good dyestuff yields.

Monoazo dyestuffs derived from p-sulfo-halophenyl diazo moiety and

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Dusseldorf, Germany

Jochen Westphal