Oxygen scavenging
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United States of America Patent
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Mar 21, 2006
Grant Date -
Mar 11, 2004
app pub date -
Aug 2, 2001
filing date -
Aug 3, 2000
priority date (Note) -
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Abstract
A fibrous catalyst comprises at least one transition metal anchored to a polymer fiber having a plurality of grafted units grafted to a polymer backbone. The polymer backbone may be a polyolefin, a fluorinated polyethylene, cellulose or viscose. The grafted units comprise a salt of a carboxylic acid, which in a preferred embodiment is a sodium salt of acrylic acid. The catalysts are particularly suitable for scavenging oxygen from sealed packages or containers and may further comprise a chemical indicator for the presence or absence of oxygen.
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