Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Joerg Lohmar

Franz-Erich Baumann

Maik Grebe

Sylvia Monsheimer

Martin Roos

Georg Oenbrink

Juergen Herwig

Bernd Guenzel

A molding, produced by a layer-by-layer process in which regions of respective polymer pulverulent layers are selectively melted via introduction of electromagnetic energy, where the process employs a powder which comprises at least one homopolyamide prepared via polycondensation of diamines and dicarboxylic acids, wherein the homopolyamide has an enthalpy of fusion of at least 125 J/g and a recrystallization temperature of at least 148&#xb0; C.

Polymer powder comprising polyamide use thereof in a moulding method and moulded body made from said polymer powder

Settling times of a catalyst in the epoxidation of a cyclic, at least monounsaturated alkene are improved by a method, comprising epoxidizing a cyclic, at least monounsaturated alkene having from 8 to 20 carbon atoms in the ring in a reaction medium containing an oxidant and a catalyst system comprising at least one metal of Groups 4, 5 and 6 of the Periodic Table of the Elements, phosphoric acid and a phase transfer catalyst and a cyclic alkane having from 8 to 20 carbon atoms in the ring, which corresponds to the alkene reactant, as settling accelerator in the epoxidation reaction.

Use of a settling accelerator in epoxidation

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Dortmund, Germany

Joerg Lohmar