PROCESS FOR POLYMERIZING ETHYLENE AND COPOLYMERIZING ETHYLENE WITH ALPHA-OLEFINS AND RELEVANT CATALYST

Ethylene homopolymers and ethylene copolymers with alpha-(C3-C10)-olefins are obtained by polymerizing the monomers with a polymerization catalyst formed by: a) an alkyl-aluminum; and b) a modified solid catalyst component obtained by treating with a Lewis' base a non-modified solid component t...

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Bibliographische Detailangaben
Hauptverfasser:	MALQUORI, STEFANO, FERRERO, CESARE, MOALLI, ANGELO, MASI, FRANCESCO, CIARDELLI, INVERNIZZI, RENZO, BARAZZONI, LIA, MENCONI
Format:	Patent
Sprache:	eng
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:	Ethylene homopolymers and ethylene copolymers with alpha-(C3-C10)-olefins are obtained by polymerizing the monomers with a polymerization catalyst formed by: a) an alkyl-aluminum; and b) a modified solid catalyst component obtained by treating with a Lewis' base a non-modified solid component to be defined by means of the following formula, expressed as atomic proportions: Ti (1), Hf (0.5-3), Si (1-6), Mg (0.5-15) Al (0,5-15), X (20-60), ROH (1-10) wherein: X represents either chlorine and bromine, and R represents an either linear or branched alkyl radical of from 1 to 6 carbon atoms. The catalyst is particularly useful for controlling the molecular weight and the molecular weight distribution of ethylene homopolymers and copolymers.