Membranes of polyurethane based materials including polyester polyols
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United States of America Patent
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Nov 27, 2001
Issued Date -
N/A
app pub date -
Nov 9, 1999
filing date -
Jun 7, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to membranes including an urethane including a polyester polyol, wherein the membrane has a gas transmission rate of 15.0 or less for nitrogen gas wherein the membrane has an average thickness of approximately 20.0 mils. Under certain embodiments, the membranes include blends of one or more polyester polyol based thermoplastic urethanes and one or more barrier materials. The membranes can be employed in a variety of applications and can be used as either monolayers or multi-layered laminates.
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