Process for producing stereoregular polymers having a narrow...

Details Process for producing stereoregular polymers having a narrow... Process for producing stereoregular polymers having a narrow...

C - Chemistry, Metallurgy

08

F

402/645

C08F 4/64 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1302640

- 49 - ABSTRACT OF THE DISCLOSURE Stereoregular polymers having a molecular weight distribution of less than 5.0 and an isotactic index in excess of 96 percent are produced by polymerizing an alpha-olefin having 3 to B carbon atoms in a low pressure gas phase fluid bed process at a temperature in excess of 80°C employing a heat stable catalyst system comprising (a) a solid catalyst component containing magnesium, titanium, halide and a polycarboxylic acid ester containing two coplanar ester groups attached to adjacent carbon atoms, as inside electron donor, (b) an organoaluminum cocatalyst, and (c) a silicon compound containing a silicon-oxygen-carbon linkage, as out- side electron donor.

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