Process for preparing ethylenic polymer compositions

Details Process for preparing ethylenic polymer compositions Process for preparing ethylenic polymer compositions

C - Chemistry, Metallurgy

08

F

402/643

C08F 10/02 (2006.01) C08F 297/08 (2006.01) C08L 23/04 (2006.01)

Patent

CA 2017183

ABSTRACT OF THE DISCLOSURE Disclosed is a process for preparing an ethylenic polymer composition involving a combination in any order of: step (a) for preparing an ethylene homopolymer or copolymer at a rate ranging from 1 to 23% by weight with respect to the total polymerization amount at a temperature of 30 °C to 80°C , said ethylenic polymer or copolymer containing an alpha-olefin other than ethylene in an amount of 10% by weight or lower and having an intrinsic viscosity [ ? ] of 10 dl/g to 40 dl/g; and step (b) for preparing an ethylene homopolymer or copolymer at a rate ranging from 77 to 99% by weight with respect to the total polymerization amount at a temperature of 60 °C to 100 °C , said ethylenic polymer or copolymer containing an alpha-olefin other than ethylene in an amount of 10% by weight or lower and having an intrinsic viscosity [ ? ] of 1.0 dl/g to 5.0 dl/g; in the presence of a catalyst obtainable from a solid catalyst component selected from a group consisting of a solid catalyst component obtainable from a magnesium alkoxide, a titanium compound and an organoaluminium halide, and a solid catalyst component containing at least titanium, zirconium, magnesium and a halogen, and an organoaluminium compound. This process can provide the ethylenic polymer composition suitable particularly for blow molding on a large scale.

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