| abstract |
Catalyst systems of the Ziegler-Natta type comprising as active constituents a) a titanium-containing solid component prepared using a titanium compound, a compound of magnesium, a halogenating agent and an electron donor component, b) an aluminum compound and c) as further electron donor component, an organosilicon compound of the formula (I)R1R2si(OR3)2(I) in which R1 is a C1-C10-alkyl radical or a C3-C8-cycloalkyl radical, R2 is a 2,4,4,6,6-pentamethylheptyl radical and R3 is a C1-C8-alkyl radical, are particularly suitable for the preparation of polymers of C2-C10-alk-1-enes. |