Methods for making oxidation resistant polymeric material

Patent metadata

Field	Value
Publication number	US-8968628-B2
Application number	US-98739911-A
Country	US
Kind code	B2
Filing date	Jan 10, 2011
Priority date	Jan 16, 2003
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.

First claim

The invention claimed is:

1. A method of making an oxidation resistant and wear resistant polymeric blend comprising the steps of:
a) mixing a polymeric material with an antioxidant in the absence of a supercritical fluid, thereby forming a polymeric blend;
b) consolidating the polymeric blend; and
c) irradiating the consolidated polymeric blend with electron-beam radiation at a dose rate of about 5 to about 3,000 Mrad/minute to a total absorbed dose of about 50 kGy to about 1…

Assignees

• Muratoglu Orhun K
• Spiegelberg Stephen H
• Gen Hospital Corp
• Cambridge Polymer Group Inc

Inventors

• Muratoglu Orhun K
• Spiegelberg Stephen H

Classifications

• A61L27/16 Primary

  Human Necessities · mapped topic

• A61L29/143

  Human Necessities · mapped topic

• C08K5/005

  Chemistry & Metallurgy · mapped topic

• B29C43/003

  Operations & Transport · mapped topic

• A61L31/143

  Human Necessities · mapped topic