Multi-component oxygen scavenger system useful in film packaging
AssigneeChevron Chemical Company
InventorsKiyoshi Katsumoto, Ta Yen Ching, Leslie P. Theard, Steven P. Current
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Abstract
An improved oxygen scavenging system is provided. The system involves an oxygen scavenging phase containing at least one oxygen-scavenger and a second phase comprising at least one catalyst effective in catalyzing a scavenging reaction. The oxygen scavenging phase is substantially devoid of any catalyst of the scavenging reaction and the second phase is effectively separate from the oxygen scavenging phase. Nevertheless, the oxygen scavenging system provides excellent scavenging capabilities while avoiding many of the prior art problems, such as undesired oxidation during high temperature processing when the system is incorporated into a multi-layer film.
Claims32
An oxygen scavenging system useful in multi-layer packaging film comprising,
- an oxygen scavenging layer comprised of at least one oxidizable compound, which layer is substantially devoid of any catalyst for an oxygen scavenging reaction;
- and
- a second layer separate from the oxygen scavenging layer and comprised of at least one catalyst effective in catalyzing an oxygen scavenging reaction.
An article comprising an oxygen scavenging system which comprises
- an oxygen scavenging layer comprising at least one oxidizable compound, and a separate layer comprising a catalyst to catalyze reaction of the oxidizable compound with oxygen when the oxidizable compound interacts with oxygen.
Dependencies are inferred from the claim text.