Bayer Aktiengesellschaft

Volker Hederich

Stephan Michaelis

Peter Roschger

Rutger Neeff

Hans-Samuel Bien

Gunter Gehrke

Karl H Schundehutte

Friedrich W Krock

Winfried Kruckenberg

Manfred Groll

Rudolf Braden

Meinhard Rolf

Walter Muller

Robert Kuth

Werner Kuhnel

Gu/ Nter Gehrke

Friedrich Wilhelm Kroeck

Guenter Gehrke

Dyestuffs of the formula (I) ##STR1## wherein Z represents SO.sub.2 or CO,

Bulk dyeing using quinophthalone dyestuffs

Dyestuffs of the formula ##STR1## wherein Z denotes a radical to complete a 3,4- or 2,3-pyridinylene, a 4,5-pyrimidinylene, a 3,4- or 4,5-pyridazinylene or a 2,3-pyrazinylene system and

Dyestuffs for bulk dyeing plastics

Phthaloperinone dyestuffs of the general formula (I) ##STR1## wherein Z denotes SO.sub.2 or CO,

Phthaloperinone dyestuffs

Isoindolazines which, in one of their tautomeric structures, have the formula ##STR1## where the rings designated X and T can be substituted and

Isoindolazines

1-Hydroxy-4-amino-5- or -8-nitroanthraquinone is obtained in high yields and in high purity when 1,8-dinitroanthraquinone or 1,5-dinitroanthraquinone respectively is reacted below 80.degree. C. in oleum in the presence of boric acid with reducing agents. The products of the process are valuable polyester dyestuffs as well as dyestuff intermediate products.

Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthraquinone

Dyestuff formulations which contain a dyestuff with at least one of the groupings of the formula ##STR1## and an emulsifying polar-nonpolar compound, are outstanding suitable for dyeing synthetic fibres since they are well soluble in the dyeing bath and do not require expensive formulation process for their preparation. In the formulae, the symbols have the following meanings:

Azo polyether dyestuffs, formulations of these dyestuffs, their

In order to dye and print cellulose fibres swollen with water-miscible swelling agents or mixed fibres containing these fibres, the fibres are treated with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula ##STR1## wherein R denotes hydrogen or optionally substituted alkyl, aryl or acyl,

Process for dyeing and printing cellulose fibres

Dyestuffs, which are free from nitro groups and sulphonic acid groups, of the formula

Anthrachinone dyestuffs

The invention relates to mixtures of water-insoluble anthraquinone dyestuffs of the formula ##STR1## in which A and B are amino or hydroxyl

1-Amino-2-(bromophenoxy-alkoxy)-4-hydroxy anthraquinone dyestuffs

The invention relates to water-insoluble anthraquinone dye-stuffs of the formula ##STR1## wherein A denotes an optionally substituted cycloalkylene group,

Anthraquinone dyestuffs

Polycyclic dyestuffs free from sulphonic acid groups of the formula ##STR1## in which A denotes an arylene radical and

Polycyclic dyestuffs

Anthraquinone dyestuffs of the formula ##SPC1## In which X.sub.1 denotes hydroxyl or amino, X.sub.2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, Z denotes alkylene, Ac denotes acyl and Y denotes hydrogen or halogen, and in which the ring A can optionally by substituted by halogen, as well as their preparation and use for the dyeing of synthetic fibre materials. The dyed materials show good fastness to light and sublimation

Anthraquinone dyestuffs of the formula ##SPC1## In which

Quinophthalone dyestuffs of the formula ##SPC1## In which Ac denotes an acyl radical, X denotes a non-ionic substituent, Y denotes hydrogen or halogen and n denotes a number from 0 to 3 as well as their production and their use for dyeing and printing organic materials.

Growing community of inventors

Cologne, Germany

Volker Hederich