| 摘要 |
<p>Polymerization of ethylene or .alpha.-olefins is carried out using a catalyst comprising a titanium component obtained by copulverizing the starting titanium component of Ziegler catalysts and an organoaluminum compound together with a small amount of ethylene or .alpha.-olfins ,and an organoaluminum component. A modified titanium catalyst component is obtained by subjecting the above copulverized titanium component to a modification treatment through contact with an inert organic solvent or its mixture with a modifier selected from the group consisting of 1) an oxygen-, sulphur-, phosphor-, nitrogen- or siliconcontaining organic compound, 2) a combination of said organic compound with aluminum halides, 3) an organoaluminum compound and 4) Lewis acid.</p> |
