Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 28, 2009
Patent Application Number
12082559
Date Filed
April 10, 2008
Patent Primary Examiner
Patent abstract
Disclosed herein is a process to produce a film comprising poly(vinyl alcohol), wherein the poly (vinyl alcohol) solution has been purified utilizing an ion exchange resin. An approximate 50 micrometer thick film produced from the purified aqueous poly(vinyl alcohol) solution has an APHA color value of 50 or less after the film has been heated at 150° C. for 60 minutes.
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