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US 11,377,538 B2Granted
Optically active build materials for 3D printing
Assignee3D Systems, Inc.
InventorsMehrgan Khavari, Khalil Moussa, Scott Broce
Life of this patent
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Abstract
Build materials for 3D printing applications are described herein which, in some embodiments, comprise a dye component operable to alter spectral characteristics of the printed part over the course of the build cycle. In some embodiments, for example, the dye component can provide desirable light penetration depth during article printing and sufficient optical clarity during final light curing processes.
Claims17
A polymerizable liquid comprising:
- a monomeric photocurable material, an oligomeric photocurable material, or mixtures thereof;
- a photoinitiator component;
- and
- a dye component,
- wherein the monomeric photocurable material comprises isocyanurate polyacrylate;
- wherein the monomeric photocurable material is present in an amount of 10-90 wt. %, based on total weight of the polymerizable liquid;
- wherein the oligomeric photocurable material is present in an amount of 10-70 wt. %, based on total weight of the polymerizable liquid;
- wherein the photoinitiator component is present in an amount of up to 5 wt. %, based on the total weight of the polymerizable liquid;
- wherein the dye component is present in an amount of 0.0005-0.02 wt. %, based on the total weight of the polymerizable liquid;
- wherein the dye component fades during post photocuring of the polymerizable liquid to provide an article that when cured satisfies the relation
- T
- a
- T
- c
- ≥
- 0.75
- where Ta and Tc are maximum transmittance values from 400-500 nm for the article and a dyeless control article, respectively.
14 more elements
A polymerizable liquid comprising:
- a monomeric photocurable material, an oligomeric photocurable material, or mixtures thereof;
- a photoinitiator component;
- and
- a dye component comprising a dye of formula I:
- wherein R1-R8 are independently selected from the group consisting or hydrogen, alkyl, and —OR9 wherein R9 is selected from the group consisting of hydrogen, alkyl, aryl, alkyl-aryl and aryl-alkyl,
- wherein the monomeric photocurable material comprises isocyanurate polyacrylate:
- wherein the monomeric photocurable material is present in an amount of 10-90 wt. %, based on total weight of the polymerizable liquid:
- wherein the oligomeric photocurable material is present in an amount of 10-70 wt. %, based on total weight of the polymerizable liquid:
- wherein the photoinitiator component is present in an amount of up to 5 wt. %, based on the total weight of the polymerizable liquid;
- and
- wherein the dye component is present in an amount of 0.0005-0.02 wt. %, based on the total weight of the polymerizable liquid.
8 more elements
Dependencies are inferred from the claim text.