Clariant Produkte (deutschland) Gmbh

Clariant Corporation

Clariant Produkte Gmbh

Klaus Brychcy

Joachim Weber

Erwin Dietz

Hans Joachim Metz

Dieter Schnaitmann

Andreas Stohr

Leonhard Unverdorben

Gerhard Wilker

Christian Wille

Thomas Hundsdorf

Heino Heckmann

Heidrun Mehler

Martin Böhmer

A method for the production of a phthalocyanine pigment preparation includes finely distributing a crude phthalocyanine pigment by dry milling, wet milling, salt kneading, acid pasting or acid swelling to give a pre-pigment, the pre-pigment is subjected to a finishing treatment in a mixture of water and an organic solvent at alkaline pH, increased temperature and in the presence of at least one pigment dispersant from the group of phthalocyanine sulphonic acids, phthalocyanine carboxylic acids, phthalocyanine sulphonate salts, phthalocyanine carboxylate salts and phthalocyanine suiphonamides.

Method for the production of phthalocyanine pigment preparations

A method for distortion-free pigmentation of partly-crystalline plastics, characterized in that a phthalocyanine pigment is used which has been heated to a temperature of at least 80&#xb0; C. as a suspension in an acid-free organic medium in the presence of a base.

Method for distortion-free pigmentation of partly-crystalline plastics with phthalocyanine pigments

A copper phthalocyanine pigment preparation contains a copper phthalocyanine pigment and at least one pigment dispersant from the group of copper phthalocyanine sulfonic acids and copper phthalocyanine sulfonic acid salts. The inventive pigment preparation is characterized by a) a maximum dynamic viscosity of 180 mPas and/or a maximum thixotropy of 800 Pa/s, the dynamic viscosity and the thixotropy being determined by a rotary viscometer at a temperature of 23&#xb0; C. in a pigment dispersion comprising 28 percent by weight of dry copper phthalocyanine pigment preparation, 9 percent by weight of nitrocellulose, 62.3 percent by weight of ethanol, and 0.7 percent by weight of ethyl acetate; and b) a color intensity such that a printing ink consisting of an ethanol/nitrocellulose gravure varnish, containing 75 to 65 percent by weight of ethanol and 9 to 11 percent by weight of nitrocellulose at a ratio of 2 to 7.5, and a maximum amount of dry copper phthalocyanine pigment preparation of 6.6 percent by weight relative to the total weight of the printing ink, reaches the &#x2153; standard depth of shade of the corresponding tone.

Phthalocyanine pigment preparations

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

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

Frankfurt am Main, Germany

Klaus Brychcy