Oxygen scavenging compositions for low temperature use
AssigneeW. R. Grace & Co.-Conn.
InventorsDrew Ve Speer, William P. Roberts
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Abstract
Improved compositions for scavenging oxygen are disclosed. These materials, characterized by low degree crystallinity and a glass transition temperature of <-10.degree. C., have high oxygen scavenging rates at low temperatures. 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.
Claims3
An oxygen scavenging composition in the form of a film, said composition consisting essentially of
- (a) an ethylenically unsaturated hydrocarbon polymer having a molecular weight of at least about 1,000 and
- (b) a transition metal catalyst, and wherein (a) has a a glass transition temperature of <-15.degree. C., and wherein (a) has an oxygen absorption rate of at least 10 cc O.sub.2 /(m.sup.2.day) at a temperature of <10.degree. C.
Dependencies are inferred from the claim text.