Appeal No. 1999-0203
Application No. 08/399,384
APPENDIX
8. A polymeric film structure having an enhanced oxygen
barrier produced by the process comprising:
coating at least one side of a polymeric substrate adapted
for receipt of an oxygen barrier with a solution of poly(vinyl
alcohol), formaldehyde-containing crosslinking agent and
crosslinking-promoting acid catalyst, said solution having a pH
of about 3.5 or less, and
wherein said acid catalyst is selected from the group
consisting of phosphoric acid, nitric acid and hydrochloric
acid.
17. A method of producing a film structure having an
enhanced oxygen barrier layer adhered thereto, comprising:
coating at least one side of a polymeric substrate adapted
for receipt of an oxygen barrier with a solution of poly (vinyl
alcohol), formaldehyde-containing crosslinking agent and
crosslinking-promoting acid catalyst, said solution having a pH
of about 3.5 or less, and
wherein said acid catalyst is selected from the group
consisting of phosphoric acid, nitric acid and hydrochloric
acid.
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