Bioresorbable thermoset polyester/urethane elastomers
AssigneeBiomedical, Inc.
InventorsDanny Concagh, Chang Cheng You, Greg Zugates
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Abstract
Bioresorbable thermoset elastomers and methods of making the same are disclosed. In certain embodiments, the thermoset elastomers include soft segments comprising branched polyesters, and hard segments including urethane and/or urea. The thermoset elastomers are made in certain embodiments by curing a branched prepolymer with a cross-linking agent. In certain embodiments, the mechanical properties of the thermoset elastomers are tailored by selecting the average molecular weight of the prepolymer, or by tuning the ratio of prepolymer to the cross-linking agent during curing, or by selecting a cross-linking agent with specific chemical characteristics.
Claims28
A polymer prepared by the process comprising the steps of:
- providing a branched polyester having at least three branches and having a glass transition temperature less than about 25° Centigrade, wherein the polyester has an average molecular weight (Mn) of at least 20,000 g/mol;
- and
- at least partially crosslinking said polyester with a symmetrical isocyanate cross linker,
- wherein said polymer is an elastomer.
A polymer prepared by the process comprising the steps of:
- providing a branched prepolymer with an average molecular weight of between 33 kDa and 65 kDa, the prepolymer having at least three branches and having a glass transition temperature less than about 25° Centigrade;
- and
- curing said polymer with an isocyanate crosslinker.
Dependencies are inferred from the claim text.