Use of cyclic oligomers in a shaping process, and moldings produced by this process

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.

1 . 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.   
     
     
         2 . The molding of  claim 1 , wherein said alternative method is injection molding. 
     
     
         3 . The molding of  claim 1 , wherein said molding has a temperature of deflection under load to ISO 75 of not more than 25% 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 defined in  claim 1 . 
     
     
         4 . The molding of  claim 3 , wherein said alternative method is injection molding. 
     
     
         5 . A molding produced by the process of  claim 1 , wherein said molding has a temperature of deflection under load to ISO 75 of not more than 10% 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 defined in  claim 1 . 
     
     
         6 . The molding of  claim 5 , wherein said alternative method is injection molding. 
     
     
         7 . 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.   
     
     
         8 . A molding produced by the process of  claim 7 , wherein the density according to DIN 53479 is not more than 10% below the density of a component produced from a polymer corresponding to the cyclic oligomer used. 
     
     
         9 . A molding produced by the process of  claim 7 , wherein the density according to DIN 53479 is not more than 8% below the density of a component produced from a polymer corresponding to the cyclic oligomer used. 
     
     
         10 . 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.   
     
     
         11 . 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.   
     
     
         12 . 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.   
     
     
         13 . 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.   
     
     
         14 . The molding of  claim 13 , wherein the melt viscosity of the component according to DIN 54811 is not more than 30% below the melt viscosity of a component produced from a polymer corresponding to the cyclic oligomer used. 
     
     
         15 . The molding of  claim 13 , wherein the melt viscosity of the component according to DIN 54811 is not more than 20% below the melt viscosity of a component produced from a polymer corresponding to the cyclic oligomer used.