A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium(IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium(IV); and (b) at least one organic acid ester; and, optionally, at least one organic acid ester and/or at least one haloalkylchlorosilane.
一种用于α-烯烃的粉碎的支撑聚合催化剂包括(A)
有机铝化合物和(B)固体含
钛组分,其形成方法是(1)粉碎固体反应产物,该反应产物包括(a)至少一种含卤素的
钛(IV)化合物;(b)至少一种电子供体;和 (c) 至少一种不溶于烃的含
镁化合物;和 (2) 用 (a) 至少一种含卤素的
钛(IV)化合物;和 (b) 至少一种有机酸酯;和(可选)至少一种有机酸酯和/或至少一种卤代烷基
氯硅烷还原这种粉碎产物。