Bayer Aktiengesellschaft

Hans-Peter Kuhlthau

Roderich Raue

Hermann Beecken

Horst Harnisch

Hubertus Psaar

Alfred Brack

Harald Gleinig

Karl Linhart

Klaus-Friedrich Lehment

Willi Eifler

Volker Huhne

Dyestuffs of the formula ##STR1## wherein R represents hydrogen or optionally substituted alkyl,

Cationic dyestuffs, a process for their preparation, and their use for

Cationic methine dyestuffs of the formula ##STR1##

Process for preparing cationic methine dyestuffs

Methine dyestuffs of the formula ##STR1## are prepared by subjecting a compound ##STR2## to a condensation reaction with a compound

Process for the preparation of cationic methine dyestuffs

A method of preparation of cationic dyestuffs having the formula ##STR1## wherein A, B, R, and R.sup.1 are defined in the specification carried out in the substantial absence of solvent and removing water formed in the reaction.

Preparation of cationic methine dyestuffs

To prepare concentrated solutions of cationic polyazo dyestuffs of the formula ##STR1## in which R represents hydrogen or methyl and

Process for the preparation of solutions of cationic polyazo dyestuffs

In the preparation of a quaternized dyestuff of the formula ##STR1## in which R.sup.1 and R.sup.2 each is an optionally substituted alkyl, alkenyl or aralkyl radical,

One pot diazotization, coupling and quaternization of aminotriazoles

To prepare dyestuffs of the general formula ##STR1## or color bases of the general formula ##STR2## wherein R.sup.1 and R.sup.2 denote hydrogen, alkyl, alkenyl or aralkyl,

Process for the preparation of cationic alkylarylhydrazone dyestuffs and

Cationic dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another represent a lower alkyl, alkenyl or hydroxyalkyl radical,

Cationic dyestuffs

Process for the preparation of benzthiazole dyestuffs by alkylation of compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 denote hydrogen, alkyl, alkenyl, cycloalkyl, aryl or aralkyl, or, conjointly with the N-atom, form a ring, or R.sub.1 can be linked to the o-position of the ring B and the rings A and B and the radicals R.sub.1 and R.sub.2 can contain non-ionic substituents and carbocyclic or heterocyclic rings can be fused to the rings A and B, with esters of the formula

Alkylation of benzthiazole-azo-phenylamine dyestuffs

Basic dyestuffs of the formula ##STR1## Wherein R.sub.2 denotes a non-ionic substituent,

Benzthiazolyl-azo-indole basic dyestuffs

A pressure-sensitive and heat-sensitive recording material contains color-forming agents of the formula ##STR1## wherein R.sub.1 denotes hydrogen or a non-ionic radical which is free from amino groups,

Pressure-sensitive recording material

Acid-modified fibre materials may be dyed in brilliant color shades in accordance with the transfer printing principle if dyestuffs of the formula ##STR1## are used in which A is a residue of the formula ##STR2## wherein R.sub.1, R.sub.3, R.sub.4, R.sub.6 -R.sub.9 are H or lower alkyl, R and R.sub.2 are lower alkyl and R.sub.5 is phenyl. The resulting transfer prints are distinguished by good fastness to light, wet processing and rubbing.

Transfer printing process with naphtholactam dyes

Cationic dyestuffs of the formula ##STR1## in which R represents hydrogen, an alkyl, alkenyl, cycloalkyl or aralkyl radical,

Triaryl-methane dyestuffs which are free from sulfonic acid and carboxylic acid groups and are selected from the group consisting of dyestuffs having one of the following four formulae: ##STR1## wherein R is alkyl, aralkyl, cycloalkyl or aryl; R.sub.1 is hydrogen, alkyl, aralkyl or cycloalkyl; R.sub.2 is alkyl, aralkyl, cycloalkyl or aryl; R.sub.1 and R.sub.2 additionally including divalent alkylene when joined together with the nitrogen or with a carbon atom in the o-position in the ring A to form a heterocyclic ring; R.sub.3 is hydrogen, alkyl, aralkyl, aryl, aralkoxy, aryloxy, halogen, carboxylic acid ester radical, carbonamido, sulfonamido, cyano, nitro, alkylsulfonyl, aryalkylsulfonyl, arylsulfonyl or acyl; and X is the radical of an anion; ##STR2## wherein R is alkyl or cycloalkyl; R.sub.1 is hydrogen, alkyl, aralkyl, cycloalkyl or aryl; R.sub.2 is alkyl, cycloalkyl, aralkyl or aryl, halogen or cyano; R.sub.1 and R.sub.2 additionally include divalent alkylene when joined together with the nitrogen atom or with a carbon atom in the o-position in the ring A to form a heterocyclic ring; R.sub.3 is hydrogen or alkyl; R.sub.4 is alkyl or cycloalkyl; and X is the radical of an anion; ##STR3## wherein R is alkyl or cycloalkyl; R.sub.1 is hydrogen or methyl; R.sub.2 is methyl, aryl, or cycloalkyl; R.sub.3 is hydrogen or alkyl; R.sub.4 is alkyl or cycloalkyl; R.sub.3 and R.sub.4 additionally include divalent alkylene when joined together to form a carbocyclic ring; and X is the radical of an anion; and ##STR4## wherein at least one R is halogen, alkyl, or alkoxy and the other R's are hydrogen, halogen, alkyl, or alkoxy; R.sub.1 is hydrogen or methyl; R.sub.2 is methyl, aryl, or cycloalkyl; and X is the radical of an anion. Process of preparing the above dyestuffs by condensation of an appropriate benzophenone with an aromatic amine or by the oxidation of the corresponding leuco compound. These dyestuffs are particularly useful in dyeing or printing materials made of polymers of acrylonitrile, polymers of as.-dicyanoethylene, and acid-modified aromatic polyesters.

Triaryl-methane dyestuffs

Cationic dyestuffs of the formula ##STR1## wherein R represents alkyl, alkenyl, cycloalkyl or aralkyl,

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Leverkusen, Germany

Hans-Peter Kuhlthau