Hoechst Aktiengesellschaft

Clariant Corporation

Clariant International Ltd

Clariant Finance (bvi) Limited

Cassella Aktiengesellschaft

Hoechst Mitsubishi Kasei Co., Ltd.

Erwin Dietz

Manfred Urban

Joachim Weber

Adolf Kroh

Leonhard Unverdorben

Siegfried Schiessler

Uwe Nickel

Michael Maikowski

Dieter Schnaitmann

Axel Schonfeld

Gustav Kapaun

Frank Prokschy

Robert Gutbrod

Hans-Tobias Macholdt

Joachim Weide

Felix Wendelin Grimm

Albert Munkel

Gerhard Wilker

Christian Wille

Juergen Patzlaff

Ulrich Buhler

Reinhold Deubel

Wolfgang Rieper

Jorg Gitzel

Klaus Kund

Max Grossmann

Olaf Schupp

Klaus Brychcy

Otmar Hafner

Siegfried Schiebler

Andreas Sommer

Wolfgang Schwab

Martin B&ouml;hmer

Willi Kreuder

Hubert Kruse

Otto Fuchs

Alexander Sieber

Klaus Hofmann

Klaus Saitmacher

Heinrich Hamal

Bernd Dewald

Manfred Opravil

Erich Hoffmann

J&ouml;rg Jung

Frank Alfter

Jurgen Hohn

Kristina Schiffer

Ferdinand Memmel

Michael Kappert

Rainer Az

The invention provides novel pigment dispersants of the formula (I):in which Q is a radical of the formula (Ia):

Pigment dispersants based on diketopyrrolopyrrole compounds and pigment preparations

The invention relates to a method for producing vattable organic pigments. The invention is characterized in that an agueous or an aqueous-organic suspension of a coarse crystalline raw mineral is vatted and re-oxidised, and the pigment suspension is ground to a diameter equal to or less than 0.9 mm during vatting and/or during oxidation by means of an agitator ball mill, which is operated at a power density of more than 1.0 KW per litre per grinding chamber and at an agitator peripheral speed of more than 12 m/s, using grinding bodies.

Method for producing vattable organic pigments

The invention provides novel pigment dispersants of the formula (I)in which is a radical of the formula (Ia)s is a number from 0.1 to 4.0 andn is a number from 0 to 2.0;and provides pigment preparations comprising an organic base pigment and a pigment dispersant of the formula (I).

The invention provides novel pigment dispersants of the formula (I)in which Q is a radical of the formula (Ia)

The invention relates to pigment dispersants of the formula (I), and to pigment preparations including at least one organic pigment and at least one pigment disperant of the formula (I):wherein Q, R, R, E, G, s and n are defined in the specification.

Acid pigment dispersants and pigment preparations

Organic pigments are conditioned by introducing a liquid prepigment suspension into a miniaturized continuous reactor and thermally treating therein.

Conditioning of organic pigments

A process for preparing diketopyrrolopyrrole pigments comprises conducting the elementary steps of pigment synthesis (reaction and hydrolysis) in a miniaturized continuous reactor.

Preparation of diketopyrrolopyrrole pigments

Process for preparing perylene-3,4,9,10-tetracarboxylic diimide in transparent pigment form

A process for preparing alcoholic solutions of alkali metal alkoxides. The process includes reacting an alkali metal with an alcohol in a microreactor wherein the microreactor provides laminer flow.

Preparation of alcoholic solutions of alkali metal alkoxides

The invention provides a process for the fine division of pigments which comprises spraying a coarsely crystalline crude pigment and/or a poorly dispersible prepigment in suspension form through nozzles to a point of conjoint collision in a reactor chamber enclosed by a housing in a microjet reactor, a gas or an evaporating liquid being passed into the reactor chamber through an opening in the housing for the purpose of maintaining a gas atmosphere in the reactor chamber, and the resulting pigment suspension and the gas or the evaporated liquid being removed from the reactor through a further opening in the housing by means of overpressure on the gas entry side or underpressure on the product and gas exit side.

Process for fine division of organic pigments

The invention provides a process for preparing azo colorants which comprises spraying one or more coupling components individually or in a mixture and one or more compatible diazonium salts individually or in a mixture, in their solution or suspension form through nozzles to a point of conjoint collision in a reactor chamber enclosed by a housing in a microjet reactor, a gas or an evaporating liquid being passed into the reactor chamber through an opening in the housing for the purpose of maintaining a gas atmosphere in the reactor chamber, and the resulting product solution or suspension and the gas or the evaporated liquid being removed from the reactor through a further opening in the housing by means of overpressure on the gas entry side or underpressure on the product and gas exit side.

Process for preparing azo colorants

The invention provides a process for the fine division of pigments which comprises dissolving coarsely crystalline crude pigments in a solvent and precipitating them with a liquid precipitation medium by spraying the pigment solution and the precipitation medium through nozzles to a point of conjoint collision in a reactor chamber enclosed by a housing in a microjet reactor, a gas or an evaporating liquid being passed into the reactor chamber through an opening in the housing for the purpose of maintaining a gas atmosphere in the reactor chamber, and the resulting pigment suspension and the gas or the evaporated liquid being removed from the reactor through a further opening in the housing by means of overpressure on the gas entry side or underpressure on the product and gas exit side.

Process for fine division of organic pigments by precipitation

Growing community of inventors

Kelkheim, Germany

Erwin Dietz