| abstract |
PURPOSE: To provide the subject catalyst component giving polyolefins having narrow mol.wt. distribution and high syndiotactic degree by forming it from a specific transition metal compound, an organic aluminum oxy compound and a finely particular carrier. n CONSTITUTION: The objective catalyst component is formed from (A) the periodic table IVb transition metal compound [e.g. isopropylidene (cyclpentadienyl- methylcyclopentadienyl)zirconium dichloride] containing as a ligand a multi- coordinate compound prepared by combining at least two different cycloalkadienyl groups or substituted products thereof with each other through a hydrocarbon, silylene or substituted silylene group, (B) an organic aluminum oxy compound [e.g. an aluminoxane of the formula (R and R 2 are methyl, ethyl, propyl or butyl; m is ≥2) and (C) a finely particular carrier. n COPYRIGHT: (C)1990,JPO&Japio |