CATALYST PRECURSOR AND CATALYST FOR THE HIGH-TEMPERATURE (CO)POLYMERIZATION OF ALPHA-OLEFINS

CATALYST PRECURSOR AND CATALYST FOR THE HIGH-TEMPERATURE (CO)POLYMERIZATION OF ALPHA-OLEFINS

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 comb...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MENCONI FRANCESCO, CONTI GIUSEPPE, MASI FRANCESCO, POLESELLO MARIO, ZANELLATO ALBERTO
Format: Patent
Sprache:eng ; pol
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung: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.