Inks for 3D printing having low polymerization shrinkage
Assignee3D Systems, Inc.
InventorKhalil Moussa
Life of this patent
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Abstract
In one aspect, inks for use with a three-dimensional (3D) printing system are described herein. In some embodiments, an ink described herein comprises 20-60 wt. % oligomeric curable material; 10-50 wt. % cyclocarbonate (meth)acrylate monomer; and 0.1-5 wt. % photoinitiator, based on the total weight of the ink. Additionally, in some cases, the ink further comprises one or more additional curable materials differing from the oligomeric curable material and the cyclocarbonate (meth)acrylate monomer. An ink described herein, in some embodiments, also comprises one or more additional component that are non-curable.
Claims20
A method of printing a three-dimensional article comprising:
- selectively depositing layers of an ink in a fluid state onto a substrate to form the three-dimensional article,
- wherein the ink comprises:
- 20-60 wt. % oligomeric curable material;
- 15-50 wt. % cyclocarbonate (meth)acrylate monomer;
- and
- 0.1-5 wt. % photoinitiator, based on the total weight of the ink,
- wherein the oligomeric curable material comprises one or more ethylenically unsaturated species having a weight average molecular weight of 500-6,000;
- wherein the cyclocarbonate (meth)acrylate monomer has the structure of Formula (A1):
- wherein R1 is selected from the group consisting of a linear or branched C1-C4 alkylene moiety;
- R2 is H or CH3;
- and
- wherein the ink, when cured, exhibits a tear strength of 30 to 200 kN/m when measured according to ASTM D624.
A method of printing a three-dimensional article comprising:
- retaining an ink in a fluid state in a container;
- selectively applying energy to the ink in the container to solidify at least a portion of a first fluid layer of the ink, thereby forming a first solidified layer that defines a first cross-section of the article;
- raising or lowering the first solidified layer to provide a second fluid layer of the ink at a surface of the fluid ink in the container;
- and
- selectively applying energy to the ink in the container to solidify at least a portion of the second fluid layer of the ink, thereby forming a second solidified layer that defines a second cross-section of the article, the first cross-section and the second cross-section being bonded to one another in a z-direction,
- wherein the ink comprises:
- 20-60 wt. % oligomeric curable material;
- 15-50 wt. % cyclocarbonate (meth)acrylate monomer;
- and
- 0.1-5 wt. % photoinitiator, based on the total weight of the ink,
- wherein the oligomeric curable material comprises one or more ethylenically unsaturated species having a weight average molecular weight of 500-6,000;
- wherein the cyclocarbonate (meth)acrylate monomer has the structure of Formula (A1):
- wherein R1 is selected from the group consisting of a linear or branched C1-C4 alkylene moiety;
- R2 is H or CH3;
- and
- wherein the ink, when cured, exhibits a tear strength of 30 to 200 kN/m when measured according to ASTM D624.
Dependencies are inferred from the claim text.