Hot melt sealant and foam-in-place gasketing material
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United States of America Patent
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Nov 10, 2015
Grant Date -
Feb 22, 2007
app pub date -
Aug 17, 2006
filing date -
Aug 17, 2005
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Abstract
A hot melt sealant and foam-in-place gasket composition based on a rubber such as ethylene propylene rubber (EPR) and/or ethylene propylene diene rubber (EPDM) and at least one semicrystalline olefinic polymer. The hot melt composition includes the rubber or a blend of rubbers in an amount of 5% to 50% by weight, at least one semicrystalline olefinic polymer in an amount of 5% to 40% by weight, at least one amorphous poly-α-olefin (APAO) polymer in an amount of 0% to 70% by weight, a compatible tackifier in an amount of 0% to 50% by weight, and a plasticizer in an amount of at least 30% by weight. The composition is particularly useful for foamed gasket applications as a replacement for pressure sensitive adhesive (PSA) coated foam tape.
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