Methods and compositions for oxygen scavenging by a rigid semi-r

Details Methods and compositions for oxygen scavenging by a rigid semi-r Methods and compositions for oxygen scavenging by a rigid semi-r

1994-06-22

1996-03-12

Geist, Gary

Compositions

Reductive bleachant, deoxidant, reductant, or generative

Deoxidant or oxygen scavenging

522 66, 428 354, 428 357, 428 358, 428 359, C09K 1502, G09K 1504, B29D 2200

Patent

active

054983649

ABSTRACT:
A method of initiating oxygen scavenging by rigid or semi-rigid articles which comprise oxidizable organic compounds and transition metal catalysts is disclosed. The method comprises initiating scavenging by exposing the composition, etc., to radiation. The radiation exposure is preferably electron beam or ultraviolet light and is preferably used on oxygen scavenging compositions which comprise a substituted or unsubstituted ethylenically unsaturated hydrocarbon and a transition metal catalyst. Inclusion of a photoinitiator or antioxidant in the scavenging composition is also preferred to facilitate and/or control the composition's scavenging properties. The method can be used for initiating scavenging in packaging layers or articles for oxygen sensitive products such as food and beverage.

REFERENCES:
patent: 5194478 (1993-03-01), Frandsen et al.
patent: 5211875 (1993-05-01), Speer et al.
patent: 5239016 (1993-08-01), Cochran et al.
patent: 5246753 (1993-09-01), Koyama et al.

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