Process for forming polymer blends
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United States of America Patent
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Oct 23, 2012
Grant Date -
Dec 15, 2011
app pub date -
Dec 10, 2009
filing date -
Dec 29, 2008
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Abstract
A method for forming a polymer blend, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110° C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110° C. and a heat of fusion in excess of 80 J/g.
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