| 摘要 |
<p>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-alpha-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.</p> |
