Bayer Aktiengesellschaft

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Dystar Japan Ltd.

Dystar Colours Distribution Gmbh

Klaus-Wilfried Wanken

Ulrich Buhler

Bernd Klinksiek

Clemens Grund

Hubert Kruse

Peter R Nyssen

Manfred Lorenz

Heinz G Zorn

Karl-Ulrich Buhler

Monoazo dyes which are stable under dyeing conditions, their preparation

Disperse Dyestuff Mixtures comprising C.I. Disperse Red 82 of the formula (I) ##STR1## and one or more dyestuffs which differ therefrom, of the formula (II) ##STR2## wherein D denotes the radical of a diazo component of the formula ##STR3## or D denotes the radical of a diazo component from the group consisting of 5,6-dichlorobenzothiazol-2-yl, 6,7-dichlorobenzothiazol-2-yl, 6-nitro-benzothiazol-2-yl or 5-nitrothiazol-2-yl, and the other substituents have the meaning given in the description, are stable to spray-drying and have outstanding use properties, in particular in the dyeing of hydrophobic fiber materials.

Disperse dyestuff mixtures

This invention relates to a process for producing finely divided dispersions of solids having an average particle size of 0.01 to 20 .mu.m by the comminution of coarse particulate dispersions in a hole- or slit-type nozzle 4 having a specific bore length to diameter ratio at a pressure difference greater than 5 bar between the nozzle inlet and the nozzle outlet. The invention also relates to an apparatus for producing the finely divided dispersion.

Process and an apparatus for producing finely divided solids dispersions

Benzimidazole-isoindolenines of the formula (I) ##STR1## wherein A represents N or a cyanomethylene radical,

Benzimidazole-isoindolenine dyestuffs

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Leverkusen, Germany

Klaus-Wilfried Wanken