Polyolefin polymerization catalyst containing sterically unhindered phenolic compounds (II)
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United States of America Patent
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Jul 31, 1984
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N/A
app pub date -
Jan 28, 1983
filing date -
Nov 19, 1981
priority date (Note) -
Expired
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Abstract
A catalyst and a process for the preparation of homopolymers and copolymers of alpha monoolefins by means of a catalyst system comprising (1) a titanium halide of the formula TiCl.sub.3 m AlCl.sub.3 where m is a number from 0 to 0.5, (2) a coordination complexing agent, the use of which is optional, and (3) an appropriate conventional aluminum-alkyl, the titanium halide (1) and the complexing agent (2), if used, having been milled together before use, wherein the catalyst system employed contains, as a further component (4), a sterically unhindered phenolic compound.
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