Catalyst for the stereospecific polymerization of alpha-olefins of 3 or more carbon atoms comprising an organoaluminium compound and a component prepared from halogen-containing compound of titanium(IV), organic electron donor, and a pretreatment product of components comprising magnesium alcoholate, Group II or IIIA metal alkyl, and optionally, one or more pretreatment modifiers such as a mineral acid or anhydride of sulfur, organometallic chalcogenide derivative of hydrogen sulfide, organic acid or organic acid ester. Preferably, the product obtained from such materials is contacted with liquid Lewis acid and mechanically activated prior to polymerization use.
用于 3 个或更多碳原子的α-烯烃立体聚合的催化剂,包括
有机铝化合物和由含卤素的
钛(IV)化合物制备的组分、有机电子供体,以及由醇酸
镁、II 或 IIIA 族
金属烷基和可选的一种或多种预处理改性剂(如矿物酸或
硫酐、
硫化氢的有机
金属卤化物衍
生物、有机酸或有机酸酯)组成的组分的预处理产物。最好是在聚合使用之前,将从这些材料中获得的产品与液态
路易斯酸接触并进行机械活化。