Metods of preventing oxidation
OwnerOrhun K. Muratoglu, Ebru Oralinventors
Life of this patent
Estimating the term…
Abstract
The present invention relates to methods for preventing oxidation of polymeric material. The invention discloses solutions for lipid- and/or cyclic deformation-initiated oxidation, methods of making oxidation and wear resistant polymeric materials, methods of preventing such oxidation and materials used therewith also are provided.
Claims109
A method of preventing lipid-initiated oxidation of polymeric material by providing an oxidation and wear resistant polymeric material, wherein the polymeric material is made by a process comprising the steps of:
- a) blending a polymeric material with one or more antioxidants;
- b) consolidating the polymeric blend;
- c) heating the consolidated polymeric blend to an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- and
- d) irradiating the heated consolidated polymeric blend with ionizing radiation at an elevated temperature that is below the melting point of the polymeric material, thereby providing an oxidation and wear resistant polymeric material that can resist lipid-initiated oxidation.
(canceled)
(canceled)
(canceled)
A method of preventing lipid-initiated oxidation of polymeric material by providing an oxidation and wear resistant polymeric material, wherein the polymeric material is made by a process comprising the steps of:
- a) irradiating a consolidated blend of polymeric materials containing one or more antioxidants by ionizing radiation at an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- b) heating a consolidated polymeric blend containing one or more antioxidants to an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- and
- c) annealing the heated consolidated polymeric blend at an elevated temperature that is below the melting point of the polymeric material, thereby providing an oxidation and wear resistant polymeric material that can resist lipid-initiated oxidation.
(canceled)
(canceled)
(canceled)
A method of preventing oxidation initiated by cyclic deformation of polymeric material by providing an oxidation and wear resistant polymeric material, wherein the polymeric material is made by a process comprising the steps of:
- a) blending a polymeric material with an antioxidant;
- b) consolidating the polymeric blend;
- c) heating the consolidated polymeric blend to an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- and
- d) irradiating the heated consolidated polymeric blend with ionizing radiation at an elevated temperature that is below the melting point of the polymeric material, thereby providing an oxidation and wear resistant polymeric material that can resist oxidation due to, caused by, induced by or initiated by cyclic deformation of the polymeric material.
(canceled)
(canceled)
A method of preventing oxidation initiated by cyclic deformation of polymeric material by providing an oxidation and wear resistant polymeric material, wherein the polymeric material is made by a process comprising the steps of:
- a) irradiating a consolidated blend of polymeric materials containing one or more antioxidants by ionizing radiation at an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- b) heating a consolidated polymeric blend containing one or more antioxidants to an elevated temperature that is above the room temperature and below the melting point of the polymeric material;
- and
- c) annealing the heated consolidated polymeric blend at an elevated temperature that is below the melting point of the polymeric material, thereby providing an oxidation and wear resistant polymeric material that can resist oxidation due to, caused by, induced by or initiated by cyclic deformation of the polymeric material.
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.