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US 6,448,315 B1Granted
Method for the preparation of UHMWPE doped with an antioxidant and an implant made thereof
AssigneeBone Support AB
InventorsLars Lidgren, Peter Bengtsson, Peter Sj{overscore (o)}vall, Bengt Wesslén
Life of this patent
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Abstract
The invention relates to a method for the preparation in a reactor of a UHMWPE material doped with an antioxidant, preferably vitamin E.
Claims19
A method for the preparation in a reactor of an antioxidant doped UHMWPE material to be used in an implant, said method comprising the steps of mixing UHMWPE particles with an antioxidant and a solvent comprising CO2 under supercritical fluid conditions at elevated temperature and pressure, a superfluid mixture being formed, and after mixing the pressure is released from said reactor, CO2 being evaporated from said mixture.
Dependencies are inferred from the claim text.