Katalysator zur (Co)Polymerisation von Ethylen und Verfahren zu deren Herstellung

• Main Authors: PAMPALONI, GUIDO, PONTEDERA (PI), IT, CALDERAZZO, FAUSTO, I-56010 GHEZZANO (PISA), IT, VALLIERI, ANDREA, I-44022 COMACCHIO (FE), IT, MASI, FRANCESCO, SAN ANGELO LODIGIANO- LODI-, IT
• Format: Patent
• Language: German
• Published: 10.12.1998
• Edition: 6
• Subjects: 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

A catalyst for the (co)polymerization of ethylene is obtained by a process comprising the contact of the following components (A), (B), (C) and (D) in the respective molar ratios (1):(0.5-2):(0-25):(0-15): <A): a bivalent arene of titanium having the formula Ti( eta -arene)(AlRxX4-x)2; wherein: "arene" indicates benzene, or benzene substituted with from 1 to 6 C1-C6 alkyl groups; each X independently represents a chlorine, bromine or fluorine atom; R is a C1C10 alkyl group, linear or branched; "x" is a number varying from 0.5 to 2.5; <B): a compound selected from the chlorides or bromides of the metals titanium, zirconium, vanadium, hafnium, tin, germanium, cerium or osmium, in the oxidation state (+4), and antimonium or vanadium in the oxidation state (+5), and the derivatives of these metals in said oxidation state with oxygenated binders wherein at least one oxygen atom is bound and/or co-ordinated to the metal; <C): an aluminum alkyl or halide of aluminum alkyl <D): an organic chloroderivative selected from: (a) di-or poly-chloroalkanes; (b) alkyl esters of aliphatic carboxylic acids di- or tri-chlorosubstituted on the carbon in alpha position with respect to the carboxyl; and (c) derivatives of chlorotriphenylmethane or dichlorodiphenylmethane having a carboxyalkyl group in the para position of at least one of the phenyl rings