Laser markable resin compositions for orthodontic appliances
AssigneeAlign Technology, Inc.
InventorsAdam LEUNG, Liang CHEN
Life of this patent
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Abstract
This disclosure provides laser markable polymerizable resin compositions comprising infrared absorbing marking additives to achieve improved laser markability of 3-D printed objects obtained from these polymerizable resin composition, and methods for marking the cured resin compositions using an infrared laser.
Claims32
A polymerizable resin composition for forming an orthodontic appliance by additive manufacturing, the polymerizable resin composition comprising:
- a telechelic compound comprising:
- an oligomeric or a polymeric chain of interconnected monomeric units having a first terminal end and a second terminal end, wherein the oligomeric or polymeric chain is selected from the group consisting of (poly)carbonate-(poly)urethane, (poly)ester-(poly)urethane, (poly)ether-(poly)urethane, (poly)thioether-(poly)urethane, hydrogenated (poly)butadiene, (poly)ester and (poly)urethane;
- at least one first reactive functional group covalently bonded to the first terminal end;
- and
- at least one second reactive functional group covalently bonded to the second terminal end;
- a reactive diluent;
- and
- an infrared absorbing marking additive.
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The composition of claim 2726, wherein the polymerizable resin composition comprises 5 to 100 ppm, based on the total weight of the composition, of the infrared absorbing marking additive.
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Dependencies are inferred from the claim text.