Crosslinking of polyethylene for low wear using radiation...

Details Crosslinking of polyethylene for low wear using radiation... Crosslinking of polyethylene for low wear using radiation...

2011-08-23

2011-08-23

McClendon, Sanza L. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S154000, C522S157000, C522S161000, C522S163000, C522S164000, C523S112000, C523S115000, C525S937000, C526S351000, C526S352000, C623S018110, C623S019110, C623S019120, C623S020110, C623S020140, C623S020150, C623S020190, C623S022110, C623S022150, C623S020220, C623S022210

Reexamination Certificate

active

08003709

ABSTRACT:
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 of 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 compositions is wear-resistant and may be fabricated into an in vivo implant.

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