Build material and applications thereof
View Patent ↗In one aspect, build materials operable for use in 3D printing systems are described herein. In some embodiments, a build material comprises about 10 to 30 percent by weight of an oligomeric curable material; about 50 to 75 percent by weight of at least one diluent; and about 3 to 15 percent by weight of a reactive component. Moreover, in some cases, the build material is free or substantially free of a non-reactive wax component.
1. A build material for use in a three-dimensional printing system comprising:
about 10 to 30 percent by weight of an oligomeric curable material;
about 50 to 75 percent by weight of at least one diluent;
about 5 to 15 percent by weight of an isocyanurate (meth)acrylate; and
less than about 5 percent by weight of a non-reactive wax component, based on the total weight of the build material,
wherein the oligomeric curable material is a urethane (meth)acrylate having a viscosity ranging from about 10,000 cps to about 300,000 cps at about 50° C.; wherein the build material when cured exhibits a tensile modulus of about 2250-3150 MPa and a tensile strength of about 46-76 MPa when measured according to ASTM D 638.
2. The build material of claim 1 , wherein the build material further comprises one or more additives selected from the group consisting of photoinitiators, inhibitors, stabilizing agents, sensitizers, and combinations thereof.
3. The build material of claim 1 , wherein the oligomeric curable material comprises about 15 to 25 percent by weight of the build material.
4. The build material of claim 1 , wherein the at least one diluent contains one or more (meth)acrylate moieties.
5. The build material of claim 1 , wherein the isocyanurate (meth)acrylate is an isocyanurate tri(meth)acrylate.
6. The build material of claim 1 , wherein the isocyanurate (meth)acrylate is tris(2-hydroxy ethyl)isocyanurate triacrylate.
7. The build material of claim 1 , wherein the build material comprises less than about 1 percent by weight of a non-reactive wax component.
8. The build material of claim 1 , wherein the build material when cured exhibits a break elongation of about 5-20% when measured according to ASTM D 638.
9. The build material of claim 1 , wherein the build material when cured exhibits a heat deflection temperature ranging from about 45° C. to about 100° C. when tested according to ASTM D 648.
10. The build material of claim 1 , wherein the build material has a viscosity ranging from about 8.0 centipoise to about 18.0 centipoise at a temperature of about 65° C.
11. A composition comprising:
a three-dimensionally printed article comprising the build material of claim 1 .
12. A method of printing a three dimensional article comprising:
selectively depositing layers of a fluid build material to form the three dimensional article on a substrate, the build material comprising the build material of claim 1 .
13. The method of claim 12 , wherein the layers of the build material are deposited according to an image of the three dimensional article in a computer readable format.
14. The method of claim 12 further comprising supporting at least one of the layers of the build material with a support material.
15. The method of claim 12 further comprising curing the build material.