C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/646 (2006.01) C08F 4/654 (2006.01) C08F 10/00 (2006.01)
Patent
CA 2145538
A process for polymerizing one or more .alpha.-olefins of up to 10 carbon atoms which comprises contacting the one or more .alpha.-olefin under polymerization conditions with a catalyst system comprising: (a) a titanium halide-containing magnesium, con- taining procatalyst component wherein the component is obtained by contacting a magnesium compound of the formula MgR'R", wherein R' and R" are, independently, alkoxide group, aryloxide group or halogen, with a halogenated tetravalent tita- nium compound in the presence of a halohydrocarbon and an alkyl ester of a polycarboxylic acid electron donor, (b) an orga- noaluminum cocatalyst component, and (c) an organosilane selectivity control agent represented by general formula (I) wherein R1, R2 and R3, are, independently, alkyl group of 1 to 12 carbon atoms; aryl group of 1 to 12 carbon atoms, alkaryl group of 1 to 12 carbon atoms, aralkyl of 1 to 12 carbon atoms or halogen; and R4 is hydrocarbyloxy of 1 to 2 carbon atoms. The pro- cess affords high catalyst productivity and produces polymer products that have broad molecular weight distribution while retaining low oligomer content properties.
Smart & Biggar
Union Carbide Chemicals & Plastics Technology Corporation
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