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 an oligomeric curable material, a reactive component that is solid at 25° C., and at least one diluent, wherein the reactive component comprises at least one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent.
1. A build material for use in a three-dimensional printing system comprising:
an oligomeric curable material;
a reactive component;
a non-reactive component comprising one or more urethane waxes; and
at least one diluent,
wherein the reactive component comprises at least one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent and wherein the reactive component is present in the build material as crystalline regions.
2. The build material of claim 1 , wherein the non-reactive component does not comprise a chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material or the at least one diluent.
3. 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.
4. The build material of claim 1 , wherein the oligomeric curable material is a urethane (meth)acrylate having a viscosity ranging from about 10,000 cps to about 300,000 cps.
5. The build material of claim 1 , wherein the oligomeric curable material and the reactive component each contain one or more acrylate or (meth)acrylate moieties.
6. The build material of claim 1 , wherein the reactive component is solid at about 30° C.
7. The build material of claim 1 , wherein the reactive component is solid at about 40° C.
8. The build material of claim 1 , wherein the reactive component is crystalline or substantially crystalline at about 30° C.
9. The build material of claim 1 , wherein the reactive component is crystalline or substantially crystalline at about 40° C.
10. The build material of claim 1 , wherein the reactive component is crystalline or substantially crystalline at about 50° C.
11. The build material of claim 1 , wherein the reactive component comprises more than one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent.
12. The build material of claim 1 , wherein the reactive component comprises at least one of the following: a urethane (meth)acrylate, a urea (meth)acrylate, and an isocyanurate (meth)acrylate.
13. The build material of claim 1 , wherein the reactive component is selected from the group consisting of:
(i) an isocyanurate tri(meth)acrylate;
(ii) a species defined by the formula R 1 —NHCOO—R 2 —R 3 , wherein R 1 is C n H (2n+2) (wherein n=4-36), R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 ;
(iii) a species defined by the formula R 1 —R 2 —NHCOO—R 3 —OOC—NH—R 2 —R 1 , wherein R 1 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 , R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is C n H (2n+2) (wherein n=2-36);
(iv) a species defined by the formula R 1 —NHCONH—R 2 —R 3 , wherein R 1 is C n H (2n+2) (wherein n=4-36), R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 ; and
(v) a species defined by the formula R 1 —R 2 —NHCONH—R 3 —OOC—NH—R 2 —R 1 , wherein R 1 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 , R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is C n H (2n+2) (wherein n=2-36).
14. The build material of claim 1 , wherein the reactive component comprises a nitrogen-containing ring.
15. The build material of claim 1 , wherein the reactive component is an isocyanurate.
16. The build material of claim 1 , wherein the reactive component is tris(2-hydroxy ethyl)isocyanurate triacrylate.
17. The build material of claim 1 , wherein the reactive component comprises about 5 to about 50 percent by weight of the build material.
18. The build material of claim 1 , wherein the reactive component comprises about 5 to about 30 percent by weight of the build material.
19. The build material of claim 1 , wherein the reactive component comprises about 5 to about 15 percent by weight of the build material.
20. The build material of claim 1 , wherein the reactive component exhibits a melting point range of about 1° C. to about 10° C.
21. The build material of claim 1 , wherein the reactive component exhibits a melting point range centered between about 40° C. and about 100° C.
22. The build material of claim 1 , wherein the at least one diluent contains one or more (meth)acrylate moieties.
23. The build material of claim 1 , wherein the build material when cured exhibits a tensile modulus of about 1500-2200 MPa when measured according to ASTM D 638.
24. The build material of claim 1 , wherein the build material when cured exhibits a tensile modulus of about 1500-1900 MPa when measured according to ASTM D 638.
25. The build material of claim 1 , wherein the build material when cured exhibits a tensile modulus of about 1550-1850 MPa when measured according to ASTM D 638.
26. The build material of claim 1 , wherein the build material when cured exhibits a break elongation of about 10-24% when measured according to ASTM D 638.
27. The build material of claim 1 , wherein the build material when cured exhibits a break elongation of about 12-22% when measured according to ASTM D 638.
28. The build material of claim 1 , wherein the build material when cured exhibits a break elongation of about 14-20% when measured according to ASTM D 638.
29. 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.
30. The build material of claim 1 , wherein the build material exhibits a melting point range centered between about 45° C. and about 55° C.
31. The build material of claim 1 , wherein the build material exhibits a melting point range centered between about 50° C. and about 65° C.
32. The build material of claim 1 , wherein the build material exhibits a melting point range centered between about 50° C. and about 80° C.
33. The build material of claim 1 , wherein the build material exhibits a melting point range centered at a temperature greater than about 40° C.
34. A composition comprising:
a three-dimensionally printed article comprising a build material, the build material comprising an oligomeric curable material, a reactive component, a non-reactive component comprising one or more urethane waxes, and at least one diluent, wherein the reactive component comprises at least one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent and wherein the reactive component is present in the build material as crystalline regions.
35. The composition of claim 34 , wherein the non-reactive component does not comprise a chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material or the at least one diluent.
36. The composition of claim 34 , wherein the reactive component is substantially crystalline at 25° C.
37. The composition of claim 34 , wherein the reactive component comprises more than one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent.
38. The composition of claim 34 , wherein the oligomeric curable material and the reactive component each contain one or more acrylate or (meth)acrylate moieties.
39. The composition of claim 34 , wherein the build material when cured exhibits a tensile modulus of 1500-2200 when measured according to ASTM D 638.
40. The composition of claim 34 , wherein the build material when cured exhibits a break elongation of 10-24% when measured according to ASTM D 638.