Patent ID: 11945943
Assignee: DESKTOP METAL, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 13:
14. A method of additive manufacturing a metal-based composite structure by binder jet printing, the method comprising:
depositing a first layer of metal powder;
depositing a binder composition on at least a portion of the first layer of metal powder, the binder composition comprising:
water,
an adhesion promoter that is a small molecule, wherein the adhesion promoter is or comprises cysteine, cystine, methionine, homocysteine, an amine thiol, dithiothreitol, mercaptoethanol, a thiocarboxylic acid, and/or a thiocarboxylate, and
a low molecular weight polymer including an acrylic acid repeat unit, wherein the binder composition has a pH of greater than or equal to 4; and

drying and/or cross-linking at least the binder composition deposited on the first layer of the metal powder, thereby forming a metal-based composite structure.