Process for preparing a poly-1-olefin

Details Process for preparing a poly-1-olefin Process for preparing a poly-1-olefin

C - Chemistry, Metallurgy

08

G

C08G 10/00 (2006.01) B01J 8/00 (2006.01) B01J 8/24 (2006.01) B01J 8/26 (2006.01) C08F 2/34 (2006.01) C08F 4/643 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2116752

Abstract Process for preparing a poly-1-olefin By means of a highly active spherical Ziegler catalyst based on a dialkylmagnesium, spherical polymers can be obtained in the polymerization of alpha-olefins. A further advantage of the catalyst of the invention lies in the high catalyst activity, so that only vary small amounts of the catalyst are required for the polymeriza- tion. The residual titanium and/or zirconium content in the polymers prepared according to the invention is less than 10 ppm. Owing to its good responsiveness to hydro- gen, the catalyst is particularly suited to two-stage processes for preparing polymers having a broad bimodal molecular weight distribution. The replacement of sulfur- containing electron donors such as diethyl sulfite by alcohols such as ethanol leads to less odor problems and broadened opportunities for use of the polymer. Owing to the spherical shape of the particles and the associated very good flow behavior of the polymers and copolymers, considerable simplification and advantages in handling, drying and processing are achieved.

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