Crosslinking of polyethylene for low wear using radiation...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 110/02 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/30 (2006.01) A61F 2/32 (2006.01) A61F 2/34 (2006.01) A61L 27/00 (2006.01) A61L 27/16 (2006.01) B29C 71/02 (2006.01) B29C 71/04 (2006.01) C08F 110/06 (2006.01) C08J 3/24 (2006.01) C08J 3/28 (2006.01) C08J 5/16 (2006.01) C08L 23/00 (2006.01) C08L 23/06 (2006.01) C08L 101/00 (2006.01) C08L 101/16 (2006.01)

Patent

CA 2260241

The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting or annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric composition is wear-resistant and may be fabricated into an in vivo implant.

Dans la présente invention, on divulgue des méthodes pour améliorer la résistance à l'usure de polymères, les polymères ainsi obtenus et des implants in vivo obtenus à partir de ces polymères. Dans un aspect de cette invention, on irradie un polymère, de préférence avec un rayonnement gamma, puis on le traite thermiquement, par exemple par refusion ou recuit. La couche superficielle la plus oxydée de la composition polymère aisni obtenue est, de préférence, éliminée. Dans un autres aspect de la présente invention, on divulgue une méthode générale pour optimiser la résistance à l'usure et les propriétés physiques et/ou chimiques souhaitables d'un polymère par réticulation et traitement thermique. La composition polymère ainsi obtenue résiste à l'usure et peut être produite dans un implant in vivo.

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