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US 12,029,623 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.
Claims18
A light polymerizable composition comprising:
- a first polymerizable component, wherein the first polymerizable component is a urethane (meth)acrylate oligomer comprising at least two polymerizable groups;
- a second polymerizable component, wherein the second polymerizable component is a first vinyl monomer not including a urethane linkage or a first thiol monomer;
- a third polymerizable component, wherein the third polymerizable component is a second vinyl monomer or a second thiol monomer comprising at least two polymerizable groups;
- and
- a photoinitiator,
- wherein a viscosity of the light polymerizable composition is less than 4000 cP at 80° C.
- wherein an amount of the first polymerizable component in the light polymerizable composition is from 15 to 40 wt %, an amount of the second polymerizable component in the light polymerizable composition is from 15 to 75 wt %, and an amount of the third polymerizable component in the light polymerizable composition is from 2 to 60 wt %, with a total amount of the first, second and third polymerizable components greater than or equal to 70 wt %, and
- wherein the light polymerizable composition is incorporated into a cross-linked polymer, wherein the cross-linked polymer forms an orthodontic appliance.
5 more elements
A method of making an orthodontic appliance comprising a cross-linked polymer, the method comprising:
- providing a light polymerizable composition comprising:
- a first polymerizable component, wherein the first polymerizable component is a urethane (meth)acrylate oligomer comprising at least two polymerizable groups;
- a second polymerizable component, wherein the second polymerizable component is a first vinyl monomer not including a urethane linkage or a first thiol monomer;
- and
- a third polymerizable component, wherein the third polymerizable component is a second vinyl monomer or a second thiol monomer comprising at least two polymerizable groups;
- a photoinitiator,
- wherein a viscosity of the light polymerizable composition is less than 4000 cP at 80° C., and
- wherein an amount of the first polymerizable component in the light polymerizable composition is from 15 to 40 wt %, an amount of the second polymerizable component in the light polymerizable composition is from 15 to 75 wt %, and an amount of the third polymerizable component in the light polymerizable components is from 2 to 60 wt %, with a total amount of the first, second and third polymerizable components greater than or equal to 70 wt %;
- fabricating at least a first portion of the orthodontic appliance comprising the cross-linked polymer by a direct fabrication technique;
- and
- fabricating at least a second portion of the orthodontic appliance comprising the cross-linked polymer by an additive manufacturing process.
8 more elements
Dependencies are inferred from the claim text.