| 摘要 |
<p>Preparation of a poly-1-olefin (I), comprises the reaction product of a magnesium alkoxide with a transition metal compound (a) and an organometallic compound (b). Preparation of a poly-1-olefin (I) (by polymerization of a 1-olefin of the formula (R 4>CH=CH 2) in suspension, in solution or in the gas phase, at 20-200[deg]C and 0.5-50 bar, in the presence of a catalyst), comprises the reaction product of a magnesium alkoxide with a transition metal compound (a) and an organometallic compound (b) and where (a) is prepared in a manner having the feature that a magnesium alkoxide powder having-a mean particle size (d 50) of 100-1000 (preferably 200-800) mu m, is firstly processed by dry milling in a mill under inert conditions to produce magnesium alkoxide powder having d 50of less than 15 mu m, then suspended in an inert hydrocarbon in which the magnesium alkoxide is insoluble and is reacted immediately without further pretreatment with a transition metal compound of titanium, zirconium, vanadium or chromium. R 4>H or 1-10C alkyl.</p> |
