Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Evonik Operations Gmbh

Evonik Operations Gbmh

Sylvia Monsheimer

Maik Grebe

Franz-Erich Baumann

Wolfgang Diekmann

Kristiane Warnke

Ulrich Simon

Wolfgang Christoph

Stefan Altkemper

Beatrice Küting

Heike Stemmer

Rainer Goering

Thomas Schiffer

Sigrid Hessel-Geldmann

Joachim Muegge

Harald Haeger

Helmut Mack

Hans Ries

Karl Kuhmann

Heinz Scholten

Frank Heindl

Odo Wunnicke

Harald Häger

Rainer Göring

Alexander Richter

Michael Beyer

Jörg Lohmar

Dirk Heinrich

Juergen Kreutz

Bodo Frings

Maximilian Cornelius

Holger Renners

Sigrid Hessel

Michael Holthausen

Johannes Chiovaro

Heinrich Temme

Joerg Lohmar

Eva Von Der Bey

Christoph Petter

Günter Brudny

Franz Erich Baumann

Susanne Leuchs

Beatrice Kueting

Tim Hupfeld

Vanessa Vennemann

Dominik Mispelkamp

Thomas Große-Puppendahl

Michael Tuerke

Frank-Erich Baumann

Martin WIELPÜTZ

Yoshiki Nakaie

Hideki Matsui

Hajime Komada

Joachim Mügge

Methods can be used for producing three-dimensional objects by powder bed fusion, using inks containing superparamagnetic particles and solvents. Sintering is performed by a magnetic field having a frequency of 50 kHz to 5 GHz.

Selective superparamagnetic sintering and an ink suitable therefor

A polyamide powder for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polyamide powder has a solution viscosity to ISO 307 of 1.8 to 2 and a rise in the solution viscosity of 0% to 25% when it is subjected to a temperature 20° C. below its melting temperature under air for 20 hours.

Polyamide powder for selective sintering methods

A polymer composition can be used for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polymer has open mesopores and the cumulative pore volume distribution of the mesopores, measured to DIN 66134, is at least 0.01 cm/g.

Polymer composition for selective sintering methods

A polymer composition can be used in selective absorbing sintering, SAS, or selective inhibition sintering, SIS, methods. The polymer of the polymer composition has open mesopores, where a cumulative pore volume distribution of the mesopores, measured according to DIN 66134, is at least 0.01 cm/g.

A polyamide powder for selective absorbing sintering, SAS, or selective inhibition sintering, SIS. The polyamide powder has a solution viscosity to ISO 307 of 1.8 to 2 and a rise in the solution viscosity of 0% to 25% when it is subjected to a temperature 20&#xb0; C. below its melting temperature under air for 20 hours.

Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the dmedian diameter of the core particles is from 3 to 100 &#x3bc;m and wherein the glass core particle material is at least one selected from the group consisting of a solid glass bead, a hollow glass bead, a porous glass bead, and a foamed glass particle. A method to prepare the particles includes dissolution of a polymer in a solvent and precipitation of the polymer in the presence of a suspension of the core glass particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.

Powder comprising polymer-coated glass particles

Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the dmedian diameter of the core particles is 1 &#x3bc;m or greater and the ratio of the dmedian diameter of the composite particles to the dmedian diameter of the core particles is 1.15 or greater, are provided. A method to prepare the particles includes dissolution of a polymer in a solvent and reprecipitation of the polymer in the presence of a suspension of the core particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.

Powder comprising polymer-coated core particles comprising metals, metal oxides, metal nitrides or semimetal nitrides

Disclosed herein is a polymer powder containing a polyamide of AB type, produced by polymerizing at least one lactam having from 10 to 12 carbon atoms in a monomer unit or by polycondensing at least one corresponding &#x3c9;-aminocarboxylic acid having from 10 to 12 carbon atoms in a monomer unit, and a polyamide of AABB type, produced by polycondensing at least one diamine and at least one dicarboxylic acid having respectively from 10 to 14 carbon atoms in monomer units. The polyamide of the AB type and the polyamide of the AABB type are prepared separately and then coprecipitated to form the polymer powder, and the polymer powder is a physical mixture of the polyamide of the AB type and the polyamide of the AABB type. Also disclosed herein is a method for producing the polymer powder.

Polyamide-based polymer powder, use thereof in a molding method, and molded articles made from said polymer powder

The present invention relates to a process for the bonding of material for the production of three-dimensional objects by selective heating via a laser of wavelength from 100 to 3000 nm. The beam spot may be a focused or unfocused beam spot, or may indeed be spread, as is the case with the diode laser, where the bars may have a stacked arrangement. The selectivity of the melting process is achieved via the application of an absorber to certain subregions of a layer composed of a pulverulent substrate, and then heating of the absorber by laser radiation of wavelength from 100 to 3000 nm. The heated absorber transfers the energy present therein to its surrounding pulverulent substrate, which is melted thereby and, after cooling, has firm cohesive bonding.

Method and device for producing three-dimensional objects using laser technology and for applying an absorber using an inkjet method

The present invention relates to a polymer powder which comprises nylon-11, and to the use of this powder for shaping processes, and also to moldings produced from this polymer powder. The moldings constructed using the inventive powder exhibit marked advantages in terms of component properties, particularly surface finish. There are also improvements here in processing and in recycling capability when comparison is made with conventional polyamide powders.

Polymer powder with polyamide, use in a shaping process, and moldings produced from this polymer powder

The present invention relates to a process for the bonding of material for the production of three-dimensional objects by selective heating with electromagnetic energy which is either non-coherent and/or non-monochromatic and/or non-oriented, with a wavelength of from 100 nm to 1 mm.

Method and device for production of three-dimensional objects by means of electromagnetic radiation and application of an absorber by means of an ink-jet method

Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the dmedian diameter of the core particles is from 1 to 70 &#x3bc;m and wherein the core particle is an inorganic material which does not include titanium dioxide are provided. A method to prepare the particles includes dissolution of a polymer in a solvent and precipitation of the polymer in the presence of a suspension of the core particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.

Powder comprising polymer-coated inorganic particles

The invention relates to powder, comprising composite particles comprising core particles completely or partially coated with a precipitated first polymer, where the core particles comprise a second polymer which differs from the precipitated first polymer, and where the ratio of the dmedian diameter of the composite particles to the dmedian diameter of the core particles is 1.15 or greater. The invention further relates to processes of using the powders of the present invention to making moldings.

Powder comprising polymer-coated polymeric core particles

An apparatus and method for the layer-by-layer production of three-dimensional objects wherein a powder layer is melted with a laser beam shaped such that the focus maximum power density is less than 50% greater than the average power density, is provided. Also provided are the corresponding mouldings.

Component properties through beam shaping in the laser sintering process

Method and device for producing three-dimensional objects using laser technology and for applying an absorber using an ink jet method

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Haltern am See, Germany

Sylvia Monsheimer