Claims
- 1. A method for the manufacture of a synthetic absorbable block copolymer formed by copolymerizing lactide as the predominant monomer with 1,3-dioxan-2-one monomer, the method comprising employing sequential addition of the monomers in the polymerization, wherein the lactide monomer, the 1,3-dioxan-2-one monomer, or a combination of the monomers is substantially completely polymerized before the addition of one of said monomers or the combination thereof such that the synthetic absorbable block copolymer has a plurality of lactic acid ester linkages comprising at least about 50 up to about 90 mole percent of said block copolymer.
- 2. The method according to claim 1 wherein said lactide monomer is L(-) lactide.
- 3. The method according to claim 1 wherein said lactide monomer is dl-lactide.
- 4. An article of manufacture comprising a fracture fixation device, the fracture fixation device manufactured from a block copolymer comprising a plurality of lactic acid ester linkages having at least about 50 up to about 90 mole percent of the block copolymer and a plurality of 1,3-dioxan-2-one linkages.
- 5. The article of claim 4 wherein the fracture fixation device is a bone plate.
- 6. A copolymer selected from the group consisting of a block and graft copolymer, the copolymer having a plurality of first linkages comprising lactic acid ester linkages and a plurality of second 1,3-dioxan-2-one linkages, the plurality of lactic acid ester linkages comprising at least about 50 up to about 90 mole percent of the copolymer.
- 7. The copolymer of claim 6 consisting of a block copolymer.
- 8. The copolymer of claim 6 wherein said copolymer is a block copolymer and said plurality of lactic acid ester linkages comprises up to about 80 mole percent of the block copolymer.
Parent Case Info
This is a continuation of co-pending application Ser. No. 07/548,802, filed on Jul. 6, 1990, now U.S. Pat. No. 5,080,665.
US Referenced Citations (8)
Continuations (1)
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Number |
Date |
Country |
Parent |
548802 |
Jul 1990 |
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