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US 10,492,888 B2Granted
Dental materials using thermoset polymers
AssigneeAlign Technology, Inc.
InventorsYan Chen, Chunhua Li, Srinivas Kaza, Neil Brian Cramer, Mary Catherine Berard
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Abstract
Provided herein are crosslinked polymers useful in orthodontic appliances and light polymerizable liquid compositions and formulations useful for making crosslinked polymers. Also provided are methods of making an orthodontic appliance comprising a cross-linked polymer formed by a direct fabrication technique.
Claims14
A crosslinked polymer for use in an orthodontic appliance, the crosslinked polymer comprising:
- a first repeating unit derived from a urethane (meth)acrylate oligomer;
- a second repeating unit derived from a vinyl or thiol monomer;
- and
- a tensile modulus from 800 MPa to 2000 MPa, a tensile strength at yield of 20 MPa to 55 MPa, an elongation at yield greater than 4% and an elongation at break greater than 30%.
1 more element
Dependencies are inferred from the claim text.