Basf Aktiengesellschaft

Hartmut Heinen

Norbert G&uuml;ntherberg

Sven Grabowski

Bernhard Czauderna

Norbert Niessner

Graham E McKee

Peter Ittemann

Franz-Josef Dietzen

Gerd Ehrmann

Joachim Seibring

Reinhold Weber

Gerhard Alicke

Andreas Kleinke

Manfred Weilbacher

J&uuml;rgen Hofmann

Peter Barghoorn

J&uuml;rgen Koch

Bernardo Wolff

Rainer Nachtrab

Norbert Mosbach

Manfred Hahn

Alexander Ludwig

Shear forces are used for essentially salt-free coagulation of plastics dispersions or rubber dispersions. For this, method of use is made of an apparatus with at least one shearing module which has a stator and a rotor arranged within the stator, where the surfaces facing toward one another in the stator and in the rotor are in each case smooth, or at least the rotor exhibits a structure formed on its surface and facing from this in the direction of the stator, and between the stator and the rotor there is a gap of predetermined gap width. The process is carried out by passing the dispersion to be coagulated through the gap between stator and rotor and precipitating the dispersion by rotation of the rotor with predetermined shear rate and shear deformation.

Method for coagulating plastics dispersions using a device with shearing elements

A thermoplastic molding composition having little intrinsic color is produced from a graft copolymer and a thermoplastic polymer. The graft copolymer is produced from a soft elastomeric particulate graft base obtained by polymerization of a conjugated diene alone or with a small amount of a monoethylenically unsaturated monomer, upon which is grafted a vinylaromatic monomer and acrylonitrile and optionally another monoethylenically unsaturated monomer. The thermoplastic polymer is a copolymer of a vinylaromatic monomer and acrylonitrile and optionally an additional monoethylenically unsaturated monomer. The thermoplastic molding composition has a low level of intrinsic color coupled with good mechanical properties and can be processed by, for example, extrusion, injection molding, calendaring, blow molding, compression molding, or sintering.

Low individual color thermoplastic molding material

Production of foam boards of high compressive strength from styrene

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Kö'ln, Germany

Hartmut Heinen