Catalyst system for hightemperature (co)polymerization of ethylene.

摘要

A catalyst system that is a combination of at least two com­ponents A and B, which components comprise:
<UnorderedLists id="ula01" listStyle="none"><ListItem>A : one or more titanium compounds and one or more vanadium com­pounds, mixed with one or more organoaluminium compounds in such an amount that the atomic ratio of aluminium to the sum of titanium and vanadium is at least 3,</ListItem><ListItem>B : one or more organoaluminium compounds,
one or both of components A and B containing a chloride, and which two components are fed, separately or in combination, direct to the reaction vessel in such an amount that the atomic ratio of the chlorine from components A and/or B to the sum of titanium and vanadium of component A is at least 6, is suitable for (co)polymeri­zation of ethylene and optionally minor amounts of 1-alkenes and/or dienes at high polymerization temperatures.</ListItem></UnorderedLists>