A catalyst for producing a polyolefin having a high melting point and a high stereoregularity, which comprises: (A) a solid catalyst component containing titanium, magnesium and halogen, (B) an organic aluminum compound, and (C) an organic silicon compound represented by formula (1):
wherein R¹, R² and R³ each represents a C₁₋₃ hydrocarbon group.
一种用于生产具有高熔点和高立体规整度的聚烯烃的催化剂,它包括:(A) 一种含有
钛、
镁和卤素的固体催化剂组分,(B) 一种
有机铝化合物,和 (C) 一种由式 (1) 表示的
有机硅化合物:
其中 R¹、R² 和 R³ 各代表一个 C₁₋₃烃基。