Polyketone powder for laser sintering
AssigneeJabil Inc.
InventorsSteven Kubiak, Zachary Peterson, Nicholas John Dippel, Mathew Artin Torosian, Thomas Fry
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Abstract
In one instance a semicrystalline polyketone powder useful for additive manufacturing is comprised of a bimodal melt peak determined by an initial differential scanning calorimetry (DSC) scan at 20° C./min and a D90 particle size of at most 300 micrometers and average particle size of 1 micrometer to 150 micrometers equivalent spherical diameter. In another instance, A composition is comprised of a semicrystalline polyketone powder having a melt peak and a recrystallization peak, wherein the melt peak and recrystallization peak fail to overlap.
Claims50
A composition comprising an aliphatic semicrystalline polyketone powder having a bimodal melt peak determined by an initial differential scanning calorimetry (DSC) scan at 20° C./min and a D90 particle size of at most 300 micrometers and average particle size of 1 micrometer to 150 micrometers equivalent spherical diameter, wherein the semicrystalline polyketone powder is a copolymer of ethylene, carbon monoxide and at least one other alkene monomer.
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A composition comprised of an aliphatic semicrystalline polyketone powder having a melt peak and a recrystallization peak as determined by differential scanning calorimetry (DSC) scanned at a 20° C./min heating and cooling rate, wherein the melt peak and recrystallization peak fail to overlap, wherein the semicrystalline polyketone powder is a copolymer of ethylene, carbon monoxide and at least one other alkene monomer.
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A method for forming an aliphatic polyketone powder useful for making an additive manufactured article comprising;
- (i) reacting carbon monoxide, alkene monomer in the presence of a group 8 through 10 transition metal catalyst to form a raw polyketone powder,
- (ii) recovering the raw polyketone powder, and
- (iii) separating the raw polyketone powder to form the polyketone powder having a D90 particle size of at most 300 micrometers and average particle size of 1 micrometer to 150 micrometers equivalent spherical diameter and an oversized polyketone powder, wherein the semicrystalline polyketone powder is a copolymer of ethylene, carbon monoxide and at least one other alkene monomer.
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A composition comprising an aliphatic semicrystalline polyketone powder having a melt peak determined by differential scanning calorimetry (DSC) scan at 20° C./min and a crystallization peak and a D90 particle size of at most 300 micrometers and average particle size of 1 micrometer to 150 micrometers equivalent spherical diameter, wherein the melt peak and crystallization peak overlap, wherein the semicrystalline polyketone powder is a copolymer of ethylene, carbon monoxide and at least one other alkene monomer.
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Dependencies are inferred from the claim text.