US 12,257,769 B2
Compositions comprising a binder and a powder, and associated methods
Ilya L. Rushkin, Acton, MA (US); Yun Bai, Burlington, MA (US); and Shannon Lee Taylor, Westford, MA (US)
Assigned to Desktop Metal, Inc., Burlington, MA (US)
Appl. No. 17/285,650
Filed by Desktop Metal, Inc., Burlington, MA (US)
PCT Filed Oct. 16, 2019, PCT No. PCT/US2019/056508
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/081666, PCT Pub. Date Apr. 23, 2020.
Claims priority of provisional application 62/746,131, filed on Oct. 16, 2018.
Prior Publication US 2021/0394265 A1, Dec. 23, 2021
Int. Cl. B22F 1/00 (2022.01); B22F 1/10 (2022.01); B22F 1/107 (2022.01); B22F 10/14 (2021.01); B29C 64/165 (2017.01); B33Y 70/10 (2020.01); B22F 1/052 (2022.01); B29K 33/00 (2006.01)
CPC B29C 64/165 (2017.08) [B22F 1/10 (2022.01); B22F 1/107 (2022.01); B22F 10/14 (2021.01); B33Y 70/10 (2020.01); B22F 1/052 (2022.01); B22F 2304/10 (2013.01); B29K 2033/26 (2013.01); B29K 2039/06 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of fabricating a metal part through additive manufacturing, the method comprising:
depositing a binder formulation onto a powder layer comprising a plurality of metal particles to form a composite layer, wherein the plurality of metal particles comprise particles of a noble metal and/or copper;
curing the composite layer; and
heating the cured composite layer such that at least a portion of the binder formulation is removed from the cured composite layer,
wherein the binder formulation comprises a solution comprising a liquid and a polymer comprising repeat units, wherein the polymer is dissolved in the liquid, and wherein at least 40% of the repeat units of the polymer are nitrogen-containing repeat units.