Mitsubishi Petrochemical Company Limited

Shoichi Masukawa

Makoto Imanari

Yoshihisa Watanabe

Sadao Kitagawa

Masuzo Yokoyama

Hideo Sakurai

Isao Okada

Teruo Saito

Shozo Ohkosi

Satosi Ohtaka

Tsunenori Takahashi

Makoto Kouno

A process for producing olefin polymers comprising contacting an ethylenically unsaturated monomer comprising at least one olefin monomer with a catalyst system comprising a combination of a catalyst component I and a catalyst component II as described hereunder:

Process for producing olefin polymers

A catalyst component, which is to be combined with an organoaluminum component to form a Ziegler catalyst for olefin polymerization, is produced by treating (1) a solid composition resulting from a process of combining a magnesium halide such as magnesium chloride, an electron donor compound such as ethyl benzoate and a titanium halogen compound such as titanium tetrachloride with (2) an interhalogen compound or a halogen such as iodine trichloride.

Process for producing catalyst components for olefin polymerization

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Ibaraki, Japan

Shoichi Masukawa