| abstract |
A coating composition that imparts oxygen barrier properties to a substrate is disclosed. The substrate may be a film such as a polyester film, for example. The coating composition contains a copolymer of maleic acid and acrylic acid, and a copolymer of vinyl alcohol and vinylamine. The barrier coating formed from the coating composition typically has a film thickness of less than about (1) microns and exhibits low oxygen permeability even at relatively high humidity. |