| 摘要 |
PURPOSE:To obtain a catalytic component which acts in high activity in the use of olefin polymerization and can produce a stereoregular polymer in high yield, by grinding specific three components at low temperature to give a solid composition and further bringing a titanium halide into contact with the solid composition. CONSTITUTION:(A) A magnesium halide (e.g., MgCl2, etc.), (B) a reaction product of an electron donor (e.g. aromatic dicarboxylic acid diester, etc.) and a titanium halide (e.g. TiCl4, TiBr4, etc.) and (C) a magnesium carbonate or a substance (e.g. MgCO3, hydrotalcite, etc.) in ratio of usually 0.1-2g component B and <=2g component C based on 1g component A are ground at <=5 deg.C low temperature to give a solid composition, which is further brought into contact with a titanium halide. The prepared catalytic component is combined with an organoaluminum compound and used as a catalyst for polymerizing an olefin.
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