Three-dimensional printing with dihydrazide antioxidants
AssigneePeridot Print LLC
InventorsEmre Hiro Discekici, Shannon Reuben Woodruff, Jesiska Tandy, Carolin Fleischmann
Life of this patent
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Abstract
The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a second fluid agent. The fusing agent can include water and a radiation absorber. The radiation absorber can absorb radiation energy and convert the radiation energy to heat. The fusing agent or the second fluid agent can include a water-soluble or water-dispersible dihydrazide antioxidant.
Claims11
A multi-fluid kit for three-dimensional printing, the multi-fluid kit comprising:
- a fusing agent comprising water and a radiation absorber, wherein the radiation absorber absorbs radiation energy and converts the radiation energy to heat;
- and
- another agent,
- wherein the fusing agent, the other agent, or both includes a water-soluble or water-dispersible dihydrazide antioxidant,
- and wherein:
- i) the water-soluble or water-dispersible dihydrazide antioxidant is present in the fusing agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the fusing agent;
- or
- ii) the water-soluble or water-dispersible dihydrazide antioxidant is present in the other agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the other agent;
- or
- iii) the water-soluble or water-dispersible dihydrazide antioxidant is present in the fusing agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the fusing agent and is present in the other agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the other agent.
A method of making a three-dimensional printed article, the method comprising:
- iteratively applying individual build material layers of polymer particles to a powder bed;
- based on a three-dimensional object model, selectively jetting a fusing agent onto the individual build material layers, wherein the fusing agent comprises water and a radiation absorber;
- based on the three-dimensional object model, selectively jetting a water-soluble or water-dispersible dihydrazide antioxidant onto the individual build material layers, wherein the dihydrazide is included in the fusing agent, in another agent separate from the fusing agent, or in both, and wherein:
- i) the water-soluble or water-dispersible dihydrazide antioxidant is present in the fusing agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the fusing agent;
- or
- ii) the water-soluble or water-dispersible dihydrazide antioxidant is present in the other agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the other agent;
- or
- iii) the water-soluble or water-dispersible dihydrazide antioxidant is present in the fusing agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the fusing agent and is present in the other agent in an amount ranging from about 0.1 wt % to about 10 wt % with respect to a total weight of the other agent;
- and
- exposing the powder bed to energy to selectively fuse the polymer particles in contact with the radiation absorber to form a fused polymer matrix at individual build material layers, wherein polymer particles in contact with the water-soluble or water-dispersible dihydrazide antioxidant exhibit reduced yellowing compared to polymer particles not in contact with the water-soluble or water-dispersible dihydrazide antioxidant.
Dependencies are inferred from the claim text.