A procatalyst for polymerization of olefins containing a...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/651 (2006.01) C08F 4/654 (2006.01) C08F 10/00 (2006.01) C08F 10/06 (2006.01)

Patent

CA 2102816

In the invention a procatalyst composition intended for the polymerization of olefins has been provided, which has been prepared by bringing together magnesium chloride, a lower alcohol, a titanium compound and an ester of phthalic acid. The procatalyst composition is active and stereospecific and it simultaneously has a titanium and phthalic acid content as low as pos- sible. These good properties have been achieved by carrying out a trans- esterification between the lower alcohol and the ester of the phthalic acid, whereby the alcoxy group of the phthalic acid comprises at least five carbon atoms.

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