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.
Claims23
A photopolymerizable compound comprising 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 ring-opening polymerization product from a monomer selected from trimethylene carbonate (T) and &-caprolactone (C), while (B) is the ring-opening polymerization product from a monomer selected from glycolide, lactide and p-dioxanone.
A light-reactive polyaxial macromer comprising a central core (CC) and 2-4 arms extending from the central core, where at least one of the arms comprises a light-reactive functional group (Q) and a block copolymer comprising blocks A and B;
- wherein
- a. block A comprises residues formed from at least one of trimethylene carbonate (TMC) and ε-caprolactone (CAP);
- and
- b. block B comprises residues formed from at least one of glycolide, lactide and p-dioxanone.
A method for photopolymerization printing an article, e.g., by stereolithography, comprising:
- a) exposing for a time with light, a photopolymerizable composition comprising
- i. at least one photopolymerizable macromer component;
- iii. at least one photoinitiator component;
- and
- b) forming a printed article comprising a polymerized form of the macromer component;
- wherein the photopolymerizable macromer component comprises a central core (CC) and a plurality of arms extending from the central core, where all or substantially all of the arms terminate in a photopolymerizable group (Q);
- where each arm is formed by the polymerization of monomers selected from two groups, denoted as group A and group B;
- to provide region A and region B, respectively, in the arms, where region A represents the polymerization product of one or more monomers comprising, and optionally selected only from, trimethylene carbonate (T) and caprolactone (C), and region B represents the polymerization product of one or more monomers comprising, and optionally selected only from, glycolide (G), lactide (L) and p-dioxanone (D).
A compound comprising 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 terminal hydroxyl group, and (A) is the ring-opening polymerization product from a monomer selected from trimethylene carbonate (T) and e-caprolactone (C), while (B) is the ring-opening polymerization product from a monomer selected from glycolide, lactide and p-dioxanone.
A polyaxial macromer comprising a central core (CC) and 2-4 arms extending from the central core, where at least one of the arms comprises a terminal hydroxyl group and a block copolymer comprising blocks A and B;
- wherein
- a. block A comprises residues formed from at least one of trimethylene carbonate (TMC) and ε-caprolactone (CAP);
- and
- b. block B comprises residues formed from at least one of glycolide, lactide and p-dioxanone.
Dependencies are inferred from the claim text.