Waterproof breathable polyurethane membranes and porous substrates protected therewith
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United States of America Patent
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May 4, 1993
Grant Date -
N/A
app pub date -
Jul 16, 1992
filing date -
Jul 16, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed herein are polyurethane compositions specifically adapted to produce non-porous membranes exhibiting waterproof and water vapor transmissible characteristics. The membranes can be produced as free standing products or can be produced as coatings on porous substrates to confer similar properties to such substrates. Also disclosed are coated fabrics and fabric laminates utilizing the membranous coatings of the invention and exhibiting waterproof and water vapor transmissible characteristics. Such coated fabrics and fabric laminates find utility in the fabrication of tenting, rainwear and other garments where waterproofness, coupled with breathability, are important features.
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