| 摘要 |
An alpha -olefin polymer having an excellent H.I. is produced with a high yield by bringing, in the presence of an organic acid ester, a feed containing at least one alpha -olefin, having 3 or more carbon atoms, into contact with a catalyst composed of: a solid catalytic ingredient which has been prepared in such a manner that an aluminosiloxy compound of the formula, <IMAGE> [1] wherein X1 represents a chlorine atom, a bromine atom or an iodine atom, is reacted with a Grignard compound of the formula R1MgX2[II] wherein R1 represents an alkyl radical having 1 to 8 carbon atoms and X2 represents a halogen atom, the resultant solid reaction product is brought into contact with a titanium tetrahalide, the resultant titanium-containing solid product is treated with an organic acid ester, and the treated solid product is brought into contact with a titanium tetrahalide; and a trialkyl aluminum.
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