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US 2011/0237756 A1Published application
Use of cyclic oligomers in a shaping process, and moldings produced by this process
AssigneeEvonik Degussa GmbH
InventorsSylvia MONSHEIMER, Alexander Richter
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Abstract
The present invention relates to a three-dimensional powder-based production process using powders based on cyclic oligomers, and to moldings produced by this process.
Claims15
A molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm,
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer, and
- wherein said molding has a temperature of deflection under load to ISO 75 of not more than 40% below the temperature of deflection under load of a molding produced by an alternative method from a polymer composed of the corresponding cyclic polymers used in the process above.
3 more elements
A molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm,
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer, and
- wherein the density according to DIN 53479 is not more than 20% below the density of a component produced from a polymer corresponding to the cyclic oligomer used.
3 more elements
An automobile molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm, and
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer.
2 more elements
An aerospace molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm, and
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer.
2 more elements
A sports equipment molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm, and
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer.
2 more elements
A molding produced by a layer-by-layer process comprising:
- selectively melting regions of one or more powder layers via input of electromagnetic energy, and
- permitting the layers to solidify to provide a solid mass,
- wherein selectivity is achieved by applying one or more aids selected from the group consisting of susceptors, inhibitors, absorbers, masks, and focusing of a laser beam,
- wherein said powder comprising cyclic oligomers and has a median grain diameter determined by laser diffraction of between 25 and 150 μm,
- wherein the powder comprises a shell comprising at least 30 percent by weight of cyclic oligomers and a core comprising a material with a density that is greater than the density of the oligomer, and
- wherein the melt viscosity of the component according to DIN 54811 is not more than 40% below the melt viscosity of a component produced from a polymer corresponding to the cyclic oligomer used.
3 more elements
Dependencies are inferred from the claim text.