Olefine polymerization catalyst and the production and use there

Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants

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526128, 526139, 526140, 526141, 526142, 526129, C08F 464

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active

043292526

ABSTRACT:
A component of a polymerization catalyst is prepared by reacting an organomagnesium halide with a solid, inorganic oxide, then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. After reacting the organo-magnesium halide with the inorganic oxide it may be treated with a halogenating agent before it is reacted with the Lewis Base compound. The product obtained is combined with an organo-aluminium compound preferably together with a Lewis Base and used to polymerize an olefin monomer particularly propylene or mixtures of ethylene and a 1-olefine containing at least 4 carbon atoms. The catalyst system has a high activity, is stereospecific and has a lower proportion of halogen than some other catalyst systems.

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