A process for producing a polymer or copolymer of an alpha-olefin comprises continuously polymerizing or copolymerizing the alpha-olefin or the alpha-olefin with up to 5 mole% of a diolefin in the presence of a catalyst composed of (A) a solid magnesium compound obtained by reacting (i) an adduct formed between a magnesium halide and an electron donor with (ii) an organometallic compound of a metal of Groups I to III of Mendelejeff's periodic table, (B) a liquid transition metal compound. and (C) an organoaluminum compound, while feeding the compound (B) separately from the other compounds (A) and (C) into a polymerization or copolymerization zone.
By means of this process it is possible to produce a polymer or copolymer of narrow molecular weight distribution, while yet avoiding the requirement of known processes of supporting a transition metal compound on a magnesium-containing carrier before carrying out a polymerization or copolymerization reaction
一种生产α-烯烃聚合物或共聚物的工艺,包括在催化剂存在下,连续聚合或共聚 α-烯烃或α-烯烃与不超过 5 摩尔%的二烯烃,催化剂由以下部分组成:(A) 固态
镁化合物,该固态
镁化合物是由(i)卤化
镁和电子供体之间形成的加合物与(ii)门捷列夫周期表第 I 至 III 族
金属的有机
金属化合物反应而得,(B)液态过渡
金属化合物,以及(C)
有机铝化合物,同时将化合物(B)与其他化合物(A)和(C)分别送入聚合或共聚区。和 (C) 一种
有机铝化合物,同时将化合物 (B) 与其他化合物 (A) 和 (C) 分开送入聚合或共聚区。
通过这种工艺,可以生产出分子量分布较窄的聚合物或共聚物,同时又避免了已知工艺中 在进行聚合或共聚反应之前将过渡
金属化合物支撑在含
镁载体上的要求。