| 摘要 |
The present invention relates to a solid complex titanium catalyst for homo- polymerization and co-polymerization of .alpha.-olefin, obtained by (i) producing a solution of a magnesium compound by dissolving a magnesium compound and a compound of IIIA Group of the Periodic Table in a solvent mixed with cyclic ether, on e or more types of alcohol, a phosphorous compound, and an organosilane, (ii) precipitating the solid particles by reacting said magnesium solution with a compound of a transition metal, a silicon compound, or the mixture thereof, and (iii) reacting said precipitat ed solid particles with a titanium compound and an electron donor. The catalyst of the present invention is of large particle size, narr ow particle distribution, and high catalytic activity, while the polymers obtained with the use of this catalyst are of excellent stereoregularity.
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