Oxygen absorber for low moisture products
AssigneeMultiform Desiccants, Inc.
InventorsJohn S. Cullen, George E. McKedy, Christopher S. Nigon, Thomas H. Powers
Life of this patent
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Abstract
An oxygen-absorbing composition for absorbing oxygen from an enclosure, such as a package, containing a low-moisture product having an equilibrium relative humidity, or water activity, of between 30% and 90% including in relatively sufficient proportions for absorbing oxygen in the container, particles of iron, particles of a solid electrolyte material, and particles of hydrogel.
Claims19
An oxygen-absorbing composition for absorbing oxygen from a container having a low moisture product therein comprising in relatively sufficient proportions for absorbing oxygen in said container, particles of iron, particles of a solid electrolyte material, and particles of a hydrogel type of flowable amorphous silicon dioxide containing 50%-70% moisture wherein said hydrogel type of flowable amorphous silicon dioxide in present in an amount by weight of between about 30% and 300% of said iron, and wherein said electrolyte material is present in an amount by weight sufficient to combine with moisture from said hydrogel to provide a sufficiently strong electrolytic solution to effect electrolytic action.
A package for absorbing oxygen from a container having a low moisture product therein comprising an envelope, and a composition in said envelope comprising in relatively sufficient proportions for absorbing oxygen in said container, particles of iron, particles of a solid electrolyte material, and particles of a hydrogel type of flowable amorphous silicon dioxide containing 50%-70% moisture wherein said hydrogel type of flowable amorphous silicon dioxide is present in an amount by weight of between about 30% and 300% of said iron, and wherein said electrolyte material is present in an amount by weight sufficient to combine with moisture from said hydrogel to provide a sufficiently strong electrolytic solution to effect electrolytic action.
A package for absorbing oxygen from a container having a low moisture product therein comprising an envelope, and a composition in said envelope comprising in relatively sufficient proportions for absorbing oxygen in said container, particles of iron, particles of a solid electrolyte material, and particles of a hydrogel type of flowable amorphous silicon dioxide containing 50%-70% moisture wherein said hydrogel type of flowable amorphous silicon dioxide is present in an amount of at least 30% by weight of the iron, and wherein said electrolyte material is present in a sufficient amount by weight to combine with moisture from said hydrogel to provide a sufficiently strong electrolytic solution to effect electrolyte action.
In combination:
- a closed container having a low moisture product therein, and a package for absorbing oxygen from said container comprising an envelope, and a composition in said envelope comprising in relatively sufficient proportions for absorbing oxygen in said container, particles of iron, particles of a solid electrolyte material, and particles of a hydrogel type of flowable amorphous silicon dioxide containing 50%-70% moisture wherein said hydrogel type of flowable amorphous silicon dioxide is present in an amount by weight of between about 30% and 300% of said iron, and wherein said electrolyte material is present in an amount by weight sufficient to combine with moisture from said hydrogel to provide a sufficiently strong electrolytic solution to effect electrolytic action.
Dependencies are inferred from the claim text.