| 摘要 |
A component of an olefin polymerisation catalyst comprises the reaction product of a dihalide or hydroxyhalide of a metal from Group IIA or IIB of the Periodic Table, preferably magnesium dichloride, with a transition metal compound comprising a metal from Group IVB or VB of the Periodic Table bonded to an O, N or S atom which in turn is bonded to a carbon atom of a carbon containing radical, preferably a titanium tetrahydrocarbyloxide, which may be subsequently reacted with an organometallic compound of a metal from Groups I to III of the Periodic Table. The component is used in conjunction with a further organometallic compound as cocatalyst. Preferably also the active catalyst component of the invention is treated with a halogen ion exchanging compound, e.g. a titanium tetrahalide, before admixture with the cocatalyst. |
