| 摘要 |
PURPOSE:To obtain an olefin polymer having high stereoregularity with high activity, by using a catalyst component comprising a specific solid catalyst component, an organometallic compound o a metal of Group I-III of the periodic table, and if desired, an electron donating compound. CONSTITUTION:A dialkoxymagnesium of the formula (wherein R<1> is a hydrocarbon group), a tetraalkoxysilane, and if desired, a tetraalkoxytitanium are reacted to obtain a solid product. The resulting solid product is reacted with TiCl4 and an aromatic carboxylic acid ester. After separation of the product, it is further reacted with TiCl4 and an aromatic carboxylic acid ester, and washed with an aromatic hydrocarbon to obtain a solid catalyst component (a) which contains Mg, Ti, halogen and an electron donating compound as essential components and 20-80wt.% of the Ti compound of which are soluble in boiling n-heptane. Then, the component (a), an organometallic compound (b) of a metal of Group I-III of the periodic table (e.g., triethylaluminum), and if desired, and electron donating compound (c) (e.g., an aromatic carboxylic acid ester) are blended in a molar ratio of Ti of the component (a)/the metal of the component (b)/the component (c) of 1/3-500/0-100 to obtain a catalyst. An olefin is polymerized using this catalyst.
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