Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1995-01-03
1996-03-12
Cross, E. Rollins
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
5261253, 5261254, 5261255, 5261256, 5261257, 502115, 502117, C08F 444, B01J 3138
Patent
active
054986761
ABSTRACT:
A high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a novel olefin polymerization procatalyst which is prepared by contacting a tetravalent titanium halide, an optional inert diluent, an electron donor and a novel solid procatalyst precursor obtained by contacting (a) a carbonated magnesium alkoxide of the general formula ##STR1## wherein R is a hydrocarbyl group having up to 12 carbon atoms and x is a number from 0.1 to about 2; and (b) at least one halogenating compound which is a non-transition metal halogenated compound or non-metallic halogenated compound. A process for polymerizing one or more .alpha.-olefins utilizing the novel high activity polymerization catalyst.
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Kemp Richard A.
Wilson Stanley E.
Cross E. Rollins
Meeks Timothy H.
Shell Polypropylene Company
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