Polyolefin compositions having high fluidity
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United States of America Patent
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Sep 22, 2009
Grant Date -
Apr 17, 2008
app pub date -
Sep 26, 2007
filing date -
Mar 12, 2002
priority date (Note) -
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Abstract
linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, containing 15% to 40% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 35% by weight, the intrinsic viscosity of the xylene soluble fraction ranging, from 1.0 to 3.0 dl/g; the (1)/(2) weight ratio ranging from 1:5 to 5:1. The polyolefin composition of the invention, preferably prepared by sequential polymerization in at least three stages, has a flexural modulus lower than 130 Mpa, shore D hardness lower than 40, and MFR ≧1.5 g/10 min.
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