Patent ID: 11958109
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A three-dimensional printing kit, comprising:
a particulate build material including from about 80 wt % to 100 wt % metal particles based on a total weight of the particulate build material, the metal particles having a D50 particle size ranging from about 1 μm to about 150 μm; and
a separate binder fluid including:
water; and
a curable polyurethane adhesion promoter in an amount ranging from about 0.5 wt % to about 15 wt % based on a total weight of the binder fluid, the curable polyurethane adhesion promoter being a reaction product of:
(a) a polyisocyanate;
(b) an acrylate or methacrylate, the acrylate or methacrylate having at least one hydroxyl functional group and having an acrylate functional group or a methacrylate functional group;
(c) a carboxylic acid including one or two hydroxyl functional groups, an amount of the carboxylic acid ranging from 0 wt % to about 10 wt %; and
(d) a sulfonate or sulfonic acid having one or two hydroxyl functional groups or one or two amino functional groups, an amount of the sulfonate or sulfonic acid ranging from about 2 wt % to about 20 wt %.