Mitsubishi Chemical Corporation

Japan Polychem Corporation

Taku Kato

Toshihiko Sugano

Sugio Nishimura

Naoshi Iwama

Masami Kashimoto

Takayuki Aoshima

Satoshi Hayakawa

Hisashi Shoda

Yoshinori Suga

Yasuo Maruyama

Toru Suzuki

Eiji Isobe

Stefan Sieber

Hideshi Uchino

Tomohiko Takahama

Eiji Taniyama

June Endo

Hirohisa Kitagawa

Yutaka Ohtani

Kazuya Okano

Catalysts for polymerization of &agr;-olefins, process for producing &agr;-olefin polymers, novel transition metal compounds and catalyst components for polymerization of &agr;-olefin

Transition metal compound, catalyst component for olefin polymerization and process for the preparation of &agr;-olefin polymer

Process for producing &agr;-olefin polymers

An alkali metal- or alkali earth metal-containing organic compound (i) is reacted with a leaving group- and silicon- or germanium-containing compound (ii) in the presence of a nitrogen-containing aromatic heterocyclic compound. By such a method, it is possible to produce a silicon- or germanium-containing organic compound, for example, a cyclopentadienyl compound cross-linked by a silicon atom or a germanium atom, typically a cyclopentadienyl compound which is substituted with a substituted or unsubstituted silyl or germyl group, for a short time with a high yield.

Processes for producing silicon- or germanium-containing organic compound, transition metal complex, catalyst for polymerization of &agr;-olefin and &agr;-olefin polymer

Transition metal compounds

Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an &agr;-olefin polymer:

The present invention provides a catalyst for polymerizing an .alpha.-olefin which is capable of producing an .alpha.-olefin polymer having a high molecular weight in a high yield under the polymerization conditions including at high temperature, and a process for preparing an .alpha.-olefin polymer, which catalyst comprises a Component (A) which comprises a coordination compound having a skeleton of a metallocene compound comprising an indenyl ring or a hydroindenyl ring which is an indenyl having a six-membered portion hydrogenated as a ligand and having Ti, Zr or Hf as a metal component in combination with a Component (B) which is, for example, an alumoxane. The coordination compound is crosslinked at the six-membered rings characterized by the fact that two of the indenyl or hydroindenyl groups are crosslinked at the six-membered ring of the indenyl or hydroindenyl group.

Catalyst component for the polymerization of .alpha.-olefins and a

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Yokohama, Japan

Taku Kato