Process for producing .alpha.-olefin polymers

Details Process for producing .alpha.-olefin polymers Process for producing .alpha.-olefin polymers

C - Chemistry, Metallurgy

08

F

402/381, 402/644

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

Patent

CA 1142698

Abstract of the Disclosure A process for producing .alpha.-olefin polymers is provided which comprises: reacting an organoaluminum compound (0-A?1) with an electron donor (ED1) to obtain a reaction product (I); reacting (I) with TiC?4 to obtain a solid product (II); reacting (II) with an electron donor (ED2) and an electron acceptor to obtain a solid product (III); combining (III) with an organoaluminum compound (0-A?2) and a reaction product (RP) of an organoaluminum (0-A?3) with an electron donor (ED3) ( (III), (0-A?2) and (RP) being referred to as catalyst components), and in this combination, subjecting a part or the whole of the catalyst components to polymerization treatment with an .alpha.-olefin at least in the presence-of (III) and said (0-A?2) to obtain a preliminarily activated catalyst; and polymerizing an .alpha.-olefin in the presence of the catalyst. According to this process, even in the case of gas phase polymerization, the resulting polymer has a uniform particle size; the catalyst employed has not only a high stability but also a high activity whereby the advantages of gas phase polymerization can be fully exhibited; and further it is possible to easily control the stereoregularity of polymer.

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