申请人:MOBIL OIL CORPORATION
公开号:EP0435627A2
公开(公告)日:1991-07-03
A supported olefin, e.g., alpha-olefin, polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium composition; (2) contacting the slurry of step (1) with a hydroxyl group-containing compound, e.g., an alcohol; (3) contacting the slurry of step (2) with at least one transition metal compound; (4) removing the non-polar solvent to obtain a dry-flowing powder; and, (5) activating the powder with dimethylaluminum chloride. The resulting catalyst composition produces polymers having substantially better distribution of side chain branches on polymer molecules than polymers made with precursors activated with conventional activators, e.g., triethylaluminum.
一种支撑烯烃(如α-烯烃)聚合催化剂组合物的合成方法是:(1)将固体催化剂载体在非极性溶剂(如己烷)中的浆液与二烷基有机镁组合物反应;(2)将步骤(1)的浆液与含羟基的化合物(如醇)接触;(3)将步骤(2)的浆液与至少一种过渡金属化合物接触;(4)除去非极性溶剂,得到干粉;(5)活化步骤(2)的浆液、(3) 将步骤(2)中的浆液与至少一种过渡金属化合物接触;(4) 去除非极性溶剂,得到干粉;(5) 用二甲基氯化铝活化粉末。与使用传统活化剂(如三乙基铝)活化的前体相比,所得催化剂组合物生产的聚合物分子侧链分支分布更均匀。