PVOH-based coating composition coated polymeric film
AssigneeMobil Oil Corporation
InventorAnthony R. Knoerzer
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Abstract
Coating compositions which have improved oxygen and flavor/odor barrier characteristics are disclosed. The coating compositions are obtained by coating a polymeric substrate with an aqueous solution of polyvinyl alcohol and urea and drying the coating at a temperature sufficient to allow the polyvinyl alcohol and urea to crosslink such that urethane linkages are formed at least between the polymeric substrate and the coating composition. Polymeric film structures including coating compositions and a method of making the same are also disclosed.
Claims12
A polymeric film structure which comprises:
- (i) a corona discharge or flame treated, hydrophobic polyolefin substrate;
- (ii) a moisture resistant primer coating composition on at least one surface of said corona treated hydrophobic polyolefin substrate, said moisture resistant coating composition comprising polyvinyl alcohol and urea crosslinked with each other and such that urethane linkages are formed at least between said hydrophobic polyolefin substrate and said coating composition, whereby a polymeric structure having oxygen and flavor/odor barrier characteristics is obtained.
A polymeric film structure which comprises:
- (i) a corona or flame treated, hydrophobic polyolefin substrate;
- (ii) a moisture resistant primer coating composition on at least one surface of said corona treated hydrophobic polyolefin substrate, said moisture resistant coating composition consisting essentially of polyvinyl alcohol, urea and ethylene acrylic acid copolymer crosslinked such that urethane linkages are formed at least between said hydrophobic polyolefin substrate and said coating composition, whereby a polymeric structure having enhanced oxygen, flavor/odor barrier and slip characteristics is obtained.
Dependencies are inferred from the claim text.