Linear ethylene/vinyl alcohol and ethylene/vinyl acetate polymers and process for making same
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United States of America Patent
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Issued Date -
May 26, 2005
app pub date -
Sep 10, 2004
filing date -
Mar 12, 2002
priority date (Note) -
Abandoned
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Abstract
A polymer comprises a repeating unit of ethylene and vinyl alcohol, characterized by a linear backbone with substantial absence of branching on the backbone. The polymer has a steady state oxygen permeability coefficient substantially independent of the humidity. In addition, a polymer comprises a repeating unit of ethylene and vinyl acetate, characterized by a linear backbone with substantial absence of branching on the backbone and a plurality of acetate groups bonded to the backbone. Some polymers comprise vinyl alcohol or acetate groups that arm separated by x-2, x-1 or x carbon atoms, and such groups are present in a ratio of 1:2:1, wherein x ranges integrally from 3 to 12.
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