Basf Se Corporation

Basf Aktiengesellschaft

Arnd Thom

Frank Braun

Hans Wohlfromm

Martin Bloemacher

Johan Ter Maat

Andreas Kern

Franz-Dieter Martischius

Martin Blömacher

Tsung-Chieh Cheng

Johan Herman Hendrik Ter Matt

Günter Fink

The invention relates to a process for the continuous thermal removal of binder from a metallic and/or ceramic shaped body which has been produced by injection molding, extrusion or pressing using a thermoplastic composition and comprises at least one polyoxymethylene homopolymer or copolymer as binder in a binder removal oven, which comprises the steps (a) removal of binder from the shaped body in a binder removal oven at a temperature which is from 5 to 20&#xb0; C. below, preferably from 10 to 15&#xb0; C. below, the temperature of a second temperature stage over a period of from 4 to 12 hours in a first temperature stage in an oxygen-comprising atmosphere, (b) removal of binder from the shaped body at a temperature in the range &#x3e;160 to 200&#xb0; C. over a period of from 4 to 12 hours in an oxygen-comprising atmosphere in a second temperature stage and (c) removal of binder from the shaped body at a temperature in the range from 200 to 600&#xb0; C. over a period of from 2 to 8 hours in a third temperature stage in an oxygen-comprising or neutral or reducing atmosphere, with the shaped bodies being transported through the binder removal oven during process steps (a) and (b).

Process for the continuous thermal removal of binder from a metallic and/or ceramic shaped body produced by injection molding, extrusion or pressing using a thermoplastic molding composition

The apparatus for the continuous catalytic removal of binder from metallic and/or ceramic shaped bodies produced by powder injection molding, which comprises a binder removal furnace through which the shaped bodies pass in a transport direction and are brought to a suitable process temperature, a feed facility for introduction of a process gas which is required for binder removal and comprises a reactant, at least one facility for the introduction of a protective gas into a reaction space of the binder removal furnace and a flare to burn the gaseous reaction products obtained in binder removal, wherein one or more devices which lead to a flow of the process gas directed transversely to the transport direction in the apparatus are present.

Device and method for continuously and catalytically removing binder, with improved flow conditions

The invention relates to open-celled melamine foams which have improved fire performance and whose cell-structure surface has been to some extent or entirely coated with an ammonium salt.

Melamine resin foam

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Alzey, Germany

Arnd Thom