Lanxess Deutschland Gmbh

Bayer Chemicals Ag

Sabine Endert

Frank Linke

Hans-Ulrich Borst

Dirk Pfuetzenreuter

Ulrich Feldhues

Stephan Michaelis

Ronald Göbel

Udo Herrmann

Heinz-Josef Fuellman

Heinz-Josef Fuellmann

Dirk Pfützenreuter

Heinz-Josef Füllmann

The novel pigment preparations containing at least one metal azo pigment A) and at least one aliphatic monocarboxylic acid B) having 10 to 22 carbon atoms are suitable for the colouring of plastics and in this connection feature improved heat stability.

Pigment preparations

The novel yellow metal azo pigments based on at least two metal azo compounds which differ at least in the type of metal have both improved dispersion properties and improved color strengths and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.

Metal azo pigments

The novel yellow metal azo pigments based on at least three metal azo compounds which differ at least in the type of metal have improved color strengths and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.

The novel yellow metal azo pigments based on at least three metal azo compounds, which differ at least in the type of metal, have improved color strengths and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.

The novel yellow metal azo pigments based on at least two metal azo compounds which differ a least in the type of metal have improved color strengths and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.

Yellow metal azo pigments based on adducts of at least two metal azo compounds provide improved dispersion properties and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.

The new metal azo pigments comprising the adduct of  

Metal azo pigments and pigment preparations produced therefrom

Process for preparing metal compounds of an azo compound which conforms in the form of its tautomeric structures to the formula (I) characterized in that the preparation takes place in the presence of seed crystals.

Process for preparing metal compounds of an azo compound in the presence of seed crystals

Metal complexes of metals of the scandium group with an azo compound which conforms to the formula (I) or to one of its tautomeric structureswhere

Growing community of inventors

Wuppertal, Germany

Sabine Endert