Coated polymeric film with oxygen barrier properties
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United States of America Patent
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Apr 21, 2009
Grant Date -
Feb 8, 2007
app pub date -
Jun 22, 2006
filing date -
Jun 22, 2005
priority date (Note) -
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Abstract
A coating compositions for providing substrates with oxygen barrier properties is disclosed. The substrate may be, for instance, a film, such as a polyester film. The coating composition includes a copolymer of maleic acid and acrylic acid and a copolymer of vinyl alcohol and a vinylamine. The barrier coating formed from the coating composition is typically less than about 1 micron in thickness and provides reduced oxygen transmission even at relatively high relative humidities.
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