Vapor permeable, water resistive, air barrier polyester membrane having a polyacrylic coating with porous pressure sensitive adhesive added to the rear surface of the membrane
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United States of America Patent
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Nov 30, 2021
Grant Date -
Jan 28, 2016
app pub date -
May 5, 2015
filing date -
Jul 22, 2013
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Abstract
An ultra violet stable polyester membrane with a polyacrylic coating on one side and a coated pressure sensitive adhesive coating on its other side capable of allowing water vapor to pass through it. The pressure sensitive adhesive is formed of a copolymer comprising a backbone of n-butyl acrylate, 2-ethylhexyl acrylate, and vinyl acetate which is mixed with at least one surfactant and emulsified to produce air bubbles which form pores when the copolymer is set with about 80% to about 90% of the pore sizes ranging from about 200 microns to about 300 microns and being uniformly distributed to form a flow path through the pressure sensitive adhesive.
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