| 摘要 |
PURPOSE:To obtain a highly active catalyst component for the polymerization of olefins, by reacting an Mg compound with an electron-donative substance and a titanium halide, crushing the reaction product at a low temperature and contacting the resultant solid composition with a titanium halide. CONSTITUTION:The objective catalyst component can be produced by (1) reacting (A) an Mg compound (e.g. MgCl2) with (B) an electron-donative substance (e.g. aromatic dicarboxylic acid diester) and (C) a titanium halide of formula TiX4 (X is halogen), (2) crushing the reaction product at a low temperature (usually <=5 deg.C) and (3) contacting the obtained solid composition with a titanium halide. EFFECT:The content of catalyst residue in the produced polymer can be suppressed to an extremely low level and a stereoregular polymer can be produced in high yield.
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