Catalyst precursor and catalyst for the high-temperature (co)polymerization of alpha-olefin
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United States of America Patent
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Sep 5, 2017
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Nov 28, 2013
app pub date -
Dec 20, 2011
filing date -
Dec 20, 2010
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Abstract
A precursor for the formation of catalysts for the (co)polymerization of α-olefins, comprising titanium, magnesium, at least one metal selected from hafnium and zirconium, aluminum and chlorine, obtained with a process comprising treatment with a siloxane compound. Said solid precursor, used in combination with a suitable co-catalyst in high-temperature (co)polymerization processes of α-olefins, shows an improved productivity, a high incorporation of co-monomers in the copolymerization of ethylene and an increased thermal stability with respect to the systems so far in use.
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