Evonik Degussa Gmbh

Evonik Operations Gmbh

Umicore Ag & Co Kg

Evonik Rohm Gmbh

Markus Pridöhl

Christian Meier

Sven Balk

Karl Kuhmann

Stephan Wieber

Peter Biberbach

Thomas Hasskerl

Guido Zimmermann

Dirk Poppe

Jan Hendrik Schattka

Hartmut Wiggers

Stefan Bernhardt

Emmanuel Auer

Manfred Braum

Harald Häger

Edwin Staab

Andreas Gutsch

Rainer Göring

Paul Roth

Karsten Ruth

Lars Herbeck

Klaus Dilger

Sebastian Roos

Thorsten Mahrholz

Michael Gross

Christian Baron

Michael Frauenhofer

Gerd Löhden

Senada Schaack

Tobias Ströhlein

Michael Krämer

Frank-Martin Petrat

Andreas Hüther

Stefan Böhm

Jürgen Mosch

The present invention relates to the technical field of 3D printing, especially in the form of the binder jetting method, in which particulate material in a powder bed is bonded by means of a printed adhesive to form a three-dimensional object. The particulate materials may be inorganic materials, for example sand or a metal powder, or particulate polymeric materials, for example polymethacrylates or polyamides. For this purpose, polymethacrylates may take the form, for example, of suspension polymers, called bead polymers. The present invention relates to the use of porous particles in the binder jetting process, in particular of porous suspension polymers. These powders for 3-D printing differ from the prior art in that the porosity results in a faster and better absorption of the printed binder by the powder particles. A great advantage of this procedure is additionally that a product with less warpage is formed and that the end product has a better surface appearance.

Production and use of porous bead polymers in 3D printing using the binder jetting method

The invention relates to plastics composite moldings obtainable via welding in an alternating electromagnetic field, in which the weld is obtained with the aid of a plastics material which comprises nano-scale, magnetic oxidic particles, which are composed of aggregated primary particles, and where the primary particles are composed of magnetic metal oxide domains whose diameter is from 2 to 100 nm in a non-magnetic metal oxide matrix or non-magnetic metalloid oxide matrix.

Plastic composite moulded bodies obtainable by welding in an electromagnetic alternating field

Process and apparatus for the thermal treatment of pulverulent substances, in which the pulverulent substance is dispersed in a carrier gas and is passed in a continuous manner through a heated reactor where it is thermally treated and is then quenched by a cooling medium and is collected in a gas-solids separating unit.

Process and apparatus for the thermal treatment of pulverulent substances

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Grosskrotzenburg, Germany

Markus Pridöhl