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US 11,628,494 B2Granted
Surface additive for three-dimensional metal printing compositions
AssigneeXerox Corporation
InventorsRichard P. N. Veregin, Karen A. Moffat
Life of this patent
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Abstract
A composition including a three-dimensional metal printing powder; an organic polymeric additive on at least a portion of an external surface of the three-dimensional metal printing powder; and optionally, an inorganic additive on at least a portion of an external surface of the three-dimensional metal printing powder. A process for preparing a three-dimensional metal printing powder having an organic polymeric additive disposed thereon. A process for employing the three-dimensional metal printing powder including selective laser sintering.
Claims20
A composition comprising:
- a three-dimensional metal printing powder;
- an organic polymeric additive disposed on at least a portion of an external surface of the three-dimensional metal printing powder;
- wherein the organic polymeric additive is a copolymer comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8, wherein the first monomer is cyclohexyl methacrylate;
- a second monomer comprising divinyl benzene, wherein the second monomer is present in the copolymer in an amount of from greater than about 8 percent by weight to about 40 percent by weight, based on the weight of the copolymer;
- and a third monomer comprising an amine, wherein the third monomer is present in an amount of from about 0.1 percent by weight to about 1.5 percent by weight, based on the weight of the copolymer, and wherein the third monomer is dimethylaminoethyl methacrylate;
- and
- optionally, an inorganic additive on at least a portion of an external surface of the three-dimensional metal printing powder.
4 more elements
A process comprising:
- providing a three-dimensional metal printing powder;
- spray drying an organic polymeric additive on at least a portion of an external surface of the three-dimensional metal printing powder;
- wherein the organic polymeric additive is a polymer or copolymer comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8, wherein the first monomer is cyclohexyl methacrylate;
- a second monomer comprising two or more vinyl groups, wherein the second monomer is divinylbenzene, wherein the second monomer, is present in the copolymer in an amount of from greater than about 8 percent by weight to about 40 percent by weight, based on the weight of the copolymer;
- and a third monomer comprising an amine, wherein the third monomer is present in an amount of from about 0.1 percent by weight to about 1.5 percent by weight, based on the weight of the copolymer, and wherein the third monomer is dimethylaminoethyl methacrylate;
- optionally, further providing an inorganic additive on at least a portion of an external surface of the three-dimensional metal printing powder;
- wherein the organic polymeric additive is prepared by emulsion polymerization.
4 more elements
A method comprising:
- providing a three-dimensional metal printing powder having an organic polymeric additive on at least a portion of an external surface of the three-dimensional metal printing powder;
- wherein the organic polymeric additive is a polymer or copolymer comprising a first monomer having a high carbon to oxygen ratio of from about 3 to about 8, wherein the first monomer is cyclohexyl methacrylate;
- a second monomer comprising divinylbenzene, wherein the second monomer is present in the copolymer in an amount of from greater than about 8 percent by weight to about 40 percent by weight, based on the weight of the copolymer;
- and a third monomer comprising an amine, wherein the third monomer is present in an amount of from about 0.1 percent by weight to about 1.5 percent by weight, based on the weight of the copolymer, and wherein the third monomer is dimethylaminoethyl methacrylate;
- and
- exposing the three-dimensional metal printing powder having the organic polymeric additive and optional inorganic additive to a laser to fuse the three-dimensional metal printing powder.
3 more elements
Dependencies are inferred from the claim text.