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US 5,346,644 AGranted
Compositions, articles & methods for scavenging oxygen
AssigneeW. R. Grace & Co.-Conn.
InventorsDrew V. Speer, William P. Roberts, Charles R. Morgan, Cynthia L. Ebner
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Abstract
A composition for scavenging oxygen is disclosed. The composition comprises an ethylenically unsaturated hydrocarbon and a transition metal catalyst and can be incorporated into various types of layers. It is preferable that the composition be incorporated into layers of multilayered articles used for packaging oxygen-sensitive products such as food products.
Claims20
A method of scavenging oxygen from a package for an oxygen-sensitive product wherein the method comprises incorporating into the package a layer comprising a composition consisting essentially of
- (a) an ethylenically unsaturated hydrocarbon polymer having a molecular weight of at least 1,000 and
- (b) a transition metal catalyst;
- wherein the rate of oxygen scavenging is at least 0.5 cc oxygen per day per gram of hydrocarbon polymer and the scavenging capacity is at least 1 cc oxygen per gram of polymer, and wherein scavenging occurs during the storage of a product in a package comprising the composition.
Dependencies are inferred from the claim text.