Process for the preparation of olefin polymer

Details Process for the preparation of olefin polymer Process for the preparation of olefin polymer

1992-12-29

1994-10-11

Delmendo, Romulo H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526125, 526348, 526351, 526352, C08F 4649, C08F 1006

Patent

active

053548205

ABSTRACT:
This invention relates to a process of producing an olefin polymer having stereoregularity by polymerizing an olefin in the presence of a catalyst obtained from (A) a solid catalyst component obtained by reacting a dialkoxymagnesium represented by the general formula: Mg(OR.sup.1).sub.m X.sup.1.sub.2-m, wherein R.sup.1 represents a cycloalkyl group, an aryl group, or an alkyl group having 1 to 10 carbon atoms, X.sup.1 represents an halogen atom, and m is 1 to 2, an organic acid ester, a silicon compound represented by the general formula: Si(OR.sup.2).sub.n X.sup.2.sub.4-n, wherein R.sup.2 represents an alkyl group, a cycloalkyl group, or an aryl group, X.sup.2 represents a halogen atom such as chlorine and bromine, and n is a real number of 0 to 3.0, and an a titanium compound, (B) an organic aluminum compound, and (C) an electron donative compound, characterized in that, as a first step, said dialkoxymagnesium, an aromatic dicarboxylic acid ester, and said silicon compound are reacted, and then, as a second step, a solid product obtained by reacting the reaction product obtained in said first step with a titanium tetrahalide is used as said solid catalyst component (A).

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