| 摘要 |
PROBLEM TO BE SOLVED: To obtain a solid catalyst ingredient and a catalyst for a polymer of a olefins capable of providing the polymer of olefins having excellent stereoregularity in high yield and further providing the polymer of olefins having very little fine powders. SOLUTION: This solid catalyst ingredient for the polymer of olefins is obtained by bringing a solid ingredient containing magnesium, titanium, an electron donative compound and a halogen atom into contact with a complex of a titanium compound and an ester compound and the catalyst for polymerizing the polymers of olefins is composed of the solid catalyst ingredient, an organoaluminum compound represented by the general formula: R1pAlQ3-p and an orgasnosilicon compound represented by the general formula: R2qSi(OR3)3-q.
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