Oxygen scavenging metal-loaded high surface area particulate compositions
AssigneeW.R. Grace & Co.-Conn.
InventorsJames George Miller, Thomas Andrew Blinka, Drew Ve Speer, William Alfred Feehley, Jr.
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Abstract
An oxygen scavenging composition composed of a carrier and a metal coated, inert, porous particulate material having the metal substantially in a zero valence state. The composition is contained within the interior cavity of a container to scavenge oxygen therein. The composition may form at least a part of the interior surface of the container or be present therein in the form of a film, mat, sachet or ceramic.
Claims18
A method of scavenging oxygen contained in a closed interior cavity of a container comprising exposing the interior cavity of said container to a composition comprising a polymeric matrix carrier having substantially uniformly distributed therein a metal coated inert, high-surface area, porous, particulate material having substantially no ion-exchange capacity with respect to the metal, a surface area of from 1 to 950 m2/gm;
- a pore volume of at least about 0.007 cc/gm, wherein the metal is in substantially its zero valence state and forms a coating on a major portion of the particulate material's surface area, and subjecting said composition to moisture in an amount sufficient to initiate oxygen scavenging.
Dependencies are inferred from the claim text.