The present invention relates to new catalysts for the polymerization of ethylene and its blends with CH2=CHR olefins, where R is an alkyl, cycloalkyl or aryl radical that has 1-12 carbon atoms, comprising the product of the reaction between:
(a) a solid catalytic component comprising a magnesium halide in an active form and a titanium compound containing at least one Ti-halogen bond;
(b) an Al-alkyl compound
(c) an electron-donor compound selected from the 1,3 diethers that have a particular structural formula.
These catalysts make it possible to produce (co)polymers of ethylene with narrow MWD with good polymerization yields.
本发明涉及
乙烯及其与
CH2=CHR烯烃(其中R为具有1-12个碳原子的烷基、环烷基或芳基)共混物聚合的新型催化剂,包括以下两种反应的产物:
(a) 固体催化组分,包括活性形式的卤化
镁和含有至少一个
钛卤键的
钛化合物;
(b) 铝烷基化合物
(c) 选自具有特定结构式的 1,3-
二醚的电子供体化合物。
这些催化剂可以生产出具有较窄截留分子量的
乙烯(共)聚合物,并具有良好的聚合收率。