| 摘要 |
A process for preparation of a transition metal component of a catalytic system for the polymerization of olefins, wherein an organo-magnesium-aluminum reaction product is formed by bringing into contact, a halogenated, alkylated or alkoxylated magnesium compound with an organo-aluminum compound, then subjecting the reaction product to a chlorination and to a treatment by a compound of a transition metal such as Ti, V, Zr and Cr. As an organo-aluminum compound there is used one or several aluminoxane compounds of the formula <IMAGE> wherein R' is an alkyl or from C1 to C16, the R''s form together a radical -O- or designate each a radical R' and n is an integer of from 0 to 20. The transition metal component obtained can be used in combination with a co-catalyst and eventually an electron donor to form a catalytic system apt to polymerize the alpha-olefins. |
