| 摘要 |
<p>A process for producing alpha -olefin polymers is provided which comprises: reacting an organoaluminum compound (A1) with an electron donor (B1) to obtain a reaction product (I); reacting (I) with TiCl4 to obtain a solid product (II); reacting (II) with an electron donor (B2) and an electron acceptor to obtain a solid product (III); combining (III) with an organoaluminum compound (A2) and a reaction product (G) of an organoaluminum (A3) with an electron donor (B3) ((III), (A2) and (G) 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 (A2) 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.</p> |
