Clariant Produkte (deutschland) Gmbh

Clariant Finance (bvi) Limited

Clariant Corporation

Clariant Produkte Gmbh

Frank Alfter

Joachim Weber

Hans-Tobias Macholdt

Carsten Plueg

Uwe Nickel

Gerhard Wilker

Karl-Heinz Schweikart

Klaus Kund

Magali Meder

Jens Paetzold

Patrick Hoetzel

Carsten Plüg

Harald Boner

Haejin Shim

Patrick Hötzel

The invention provides a method of conditioning azo pigments containing carboxylic ester groups, using glycol monoalkyl ethers or mixtures of glycols and glycol dialkyl ether.

Method of conditioning azo pigments containing carboxylic ester groups

The invention relates to a pigment preparation which contains the monoazo pigment of the formula (I) and 0.1% to 40%, preferably 0.5% to 25%, in particular 1.0% to 17.5% of a pigment dispersant, in relation to the weight of the monoazo pigment of the formula (I), which is composed of disazo compounds at least 30% of the diazo compounds forming an asymmetric disazo compound of the formula (II)Y-X-A-X-Z&#x2003;&#x2003;(II),in which

Pigment preparation based on an azo pigment

A pigment composition containing a disazo pigment of formula (I) and at least one pigment from the group of organic orange, red and violet pigments 

Pigment compositions consisting of a yellow disazo pigment and an organic pigment

A process for preparing disazo condensation pigments by diazotization of an aromatic amine, azo coupling with a coupling component to form an azocarboxylic acid or azodicarboxylic acid, formation of an azocarbonyl chloride or azodicarbonyl dichloride and condensation of the azocarbonyl chloride with an aromatic diamine or of the azodicarbonyl dichloride with an aromatic amine comprises effecting the acyl chloride formation and/or the condensation and optionally the diazotization and optionally the azo coupling in a microreactor.

Preparation of disazo condensation pigments in microreactors

Growing community of inventors

Bad Soden, Germany

Frank Alfter