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US 5,084,356 AGranted
Film coated with glass barrier layer with metal dopant
AssigneeE. I. Du Pont de Nemours and Company
InventorsGedeon I. Deak, Scott C. Jackson
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Abstract
A structure comprising a polymeric film substrate and a glassy coating of silicon dioxide heavily doped with at least one metal selected from the group consisting of antimony, aluminum, chromium, cobalt, copper, indium, iron, lead, manganese, tin, titanium, tungsten, zinc, and zirconium, provides improved barrier properties.
Claims22
A structure having superior barrier properties, comprising:
- (a) a polymeric substrate, and
- (b) a glassy coating of silicon dioxide doped with at least one metal selected from the group consisting of antimony, aluminum, chromium, cobalt, copper, indium, iron, lead, manganese, tin, titanium, tungsten, zinc, and zirconium, said coating and metal dopant contained therein being present in an amount suitable to provide an oxygen transmission value through the coated structure of at most about 5 mL/day-m.sup.2 -atm.
A structure having superior barrier properties, comprising:
- (a) a polymeric substrate, and
- (b) a glassy coating of silicon dioxide doped with lithium borate in an amount suitable to provide an oxygen transmission value through the coated structure of at most about 5 mL/day-m.sup.2 -atm.
Dependencies are inferred from the claim text.