Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-07-17
1981-05-26
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
526142, C08F 464
Patent
active
042697328
ABSTRACT:
A TiCl.sub.3 olefin polymerization catalyst component is prepared by reducing TiCl.sub.4 with an aluminum trihydrocarbyl compound in a molar ratio of Ti:Al of 2.7:1 to 4.0:1 in the presence of diisoamyl ether and a hydrocarbon solvent by gradually adding TiCl.sub.4 to the aluminum trihydrocarbyl compound and at least a substantial proportion of the diisoamyl ether at a temperature of from 15.degree. to 50.degree. C. during a period of from 0.7 to 2.5 hours to produce a precipitate of TiCl.sub.3, and thereafter converting the precipitate into active TiCl.sub.3 by heating at a temperature of from 80.degree. to 110.degree. C. during at least 30 minutes. The active TiCl.sub.3, when combined with a conventional organoaluminum cocatalyst, provides a stereospecific catalyst for the polymerization of alpha monoolefins having high activity, good morphology and good stereospecificity.
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Kortbeek Andras G. T. G.
van der Linden-Lemmers Wilhelmina J. M.
Baer Martin S.
Garvin Patrick
Shell Oil Company
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