Binding agents for printing 3d green body objects
AssigneePeridot Print LLC
InventorNatalie Harvey
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a binding agent for printing a 3D green body object. The binding agent includes from about 0.3 wt % to about 3 wt % adhesion promoter including an aromatic maleic anhydride-containing copolymer, from about 2 wt % to about 20 wt % a (meth)acrylic latex binder, from about 10 wt % to about 40 wt % solvent package including from about 3 wt % to about 40 wt % of a coalescing solvent, and from about 40 wt % to about 88 wt % 10 water. The weight percentage ranges are based on total content of the binding agent.
Claims19
A binding agent for printing a 3D green body object, the binding agent comprising:
- from about 0.3 wt % to about 3 wt % of an adhesion promoter including a maleic anhydride-containing copolymer selected from the group consisting of:
- a potassium salt of poly (isobutylene-alt-maleic anhydride) having a weight average molecular weight ranging from about 1000 MW to about 2000 MW;
- and
- an ammonium salt of styrene-maleic anhydride having a weight average molecular weight ranging from about 1000 MW to about 2000 MW;
- from about 2 wt % to about 20 wt % of a (meth)acrylic latex binder;
- from about 10 wt % to about 40 wt % of a solvent package, wherein the solvent package includes from about 3 wt % to about 40 wt % of a coalescing solvent;
- and
- from about 40 wt % to about 88 wt % of water,
- wherein weight percentage ranges are based on a total content of the binding agent.
A three-dimensional printing kit, comprising:
- a particulate build material comprising from about 80 wt % to 100 wt % of metal particles based on a total weight of the particulate build material;
- and
- a binding agent comprising:
- water;
- from about 0.3 wt % to about 3 wt % of an adhesion promoter including a maleic anhydride-containing copolymer based on a total content of the binding agent, wherein the maleic anhydride-containing copolymer is selected from the group consisting of:
- a potassium salt of poly (isobutylene-alt-maleic anhydride) having a weight average molecular weight ranging from about 1000 MW to about 2000 MW;
- and
- an ammonium salt of styrene-maleic anhydride having a weight average molecular weight ranging from about 1000 MW to about 2000MW;
- and
- from about 2 wt % to about 20 wt % of a (meth)acrylic latex binder based on the total content of the binding agent.
A method of three-dimensional printing, comprising:
- iteratively applying individual build material layers of a particulate build material, wherein the particulate build material includes from about 80 wt % to 100 wt % of metal particles based on a total weight of the particulate build material;
- based on a 3D object model, selectively applying a binding agent to the individual build material layers to define individually patterned layers of a 3D green body object, wherein the binding agent includes:
- water;
- from about 0.3 wt % to about 3 wt % of an adhesion promoter including an maleic anhydride-containing copolymer based on a total content of the binding agent, the maleic anhydride-containing copolymer being selected from the group consisting of:
- a potassium salt of poly (isobutylene-alt-maleic anhydride) having a weight average molecular weight ranging from about 1000 MW to about 2000 MW;
- and
- an ammonium salt of styrene-maleic anhydride having a weight average molecular weight ranging from about 1000 MW to about 2000 MW;
- and
- from about 2 wt % to about 20 wt % of a (meth)acrylic latex binder based on the total content of the binding agent;
- and
- heating the individually patterned layers of the 3D green body object to drive off water and further solidify the 3D green body object.
Dependencies are inferred from the claim text.