Macromers and compositions for photocuring processes
AssigneePoly-Med, Inc.
InventorsMichael Aaron Vaughn, Prabhjot Saini
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Abstract
Compounds and compositions are provided which are useful in additive printing, particularly additive printing techniques such as stereolithography (SLA) wherein a macromer is photopolymerized to form a manufactured article. Representative compounds comprise a polyaxial central core (CC) and 2-4 arms of the formula (A)-(B) or (B)-(A) extending from the central core, where at least one of the arms comprise a light-reactive functional group (Q) and (A) is the free-radical polymerization product from monomers selected from trimethylene carbonate (T) and ε-caprolactone (C), while (B) is the free-radical polymerization product from monomers selected from glycolide, lactide and p-dioxanone.
Claims8
A photopolymerizable composition comprising:
- a photopolymerizable compound, and
- a photoinitiator,
- where
- the photopolymerizable compound comprises a polyaxial central core (CC) and 2-4 arms of a formula (A)-(B) or (B)-(A) extending from the central core,
- at least one of the arms comprises a light-reactive functional group (Q) comprising a thiol group, an acrylate group, or a methacrylate group, (A)
- (A) is a ring-opening polymerization product from a monomer selected from trimethylene carbonate (T) and ε-caprolactone (C), and
- (B) is a ring-opening polymerization product from a monomer of at least one of glycolide, lactide, or p-dioxanone,
- wherein the photopolymerizable compound comprises CC-[A-B-Q]2, CC-[A-B-Q]3, CC-[A-B-Q]4, CC-[B-A-Q]2, CC-[B-A-Q]3, or CC-[B-A-Q]4.
Dependencies are inferred from the claim text.