A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure:
[R1—O—C(O)—O—]xR2
wherein R1 is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; x is 2-4; and R2 is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms, provided that there are 2 atoms in the shortest chain connecting a first R1—O—C(O)—O— group and a second R1—O—C(O)—O— group.
一种固体、烃类不溶性催化剂成分,可用于聚合烯烃,该催化剂成分含有
镁、
钛和卤素,并进一步含有具有以下结构的内部电子给体:[R1—O—C(O)—O—]xR2,其中R1在每次出现时独立地是1-20个碳原子的脂肪族或芳香族烃或取代烃基;x为2-4;R2是1-20个碳原子的脂肪族或芳香族烃或取代烃基,前提是第一个R1—O—C(O)—O—基团和第二个R1—O—C(O)—O—基团之间的最短链中有2个原子。