Idemitsu Kosan Company, Limited

Hideaki Noda

Kiyokazu Katayama

Shojiro Tanase

Takehito Konakazawa

Nobuhiro Yabunouchi

Kiyohiko Yokota

Takanori Sadashima

Kenji Tanaka

Hitomi Shimizu

Provided is a method for producing an &#x3b1;-olefin polymer, comprising the step of polymerizing one or more kinds of &#x3b1;-olefins each having 3 to 30 carbon atoms with a polymerization catalyst obtained by using: (A) a metallocene compound; (B) an ionic compound capable of reacting with the metallocene compound to transform the compound into a cation; (C) an organometallic compound; and (D) one or more kinds of compounds selected from the group consisting of (d-1) an alcohol, (d-2) a phenol, and (d-3) an ether compound, the catalyst having a ratio between the component (A) and the component (D) of from 10:1 to 1:100 in terms of a molar ratio, and having a ratio of the component (D) to the component (C) of less than 1 in terms of a molar ratio.

Methods for producing &#x3b1;-olefin polymer and hydrogenated &#x3b1;-olefin polymer

Provided is a method of producing an &#x3b1;-olefin polymer including a step of polymerizing one or more kinds of &#x3b1;-olefins each having 6 to 20 carbon atoms with a catalyst obtained by using a specific transition metal compound. By the method, an &#x3b1;-olefin polymer having a viscosity suitable for use in a lubricating oil can be produced on an industrial scale with ease, and further, the characteristics of the product can be widely changed through the control of reaction conditions.

Process for producing &#x3b1;-olefin polymer, &#x3b1;-olefin polymer, and lubricating oil composition

A magnesium compound obtainable by reacting metal magnesium, ethanol, an alcohol having from 3 to 10 carbon atoms and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium at 0 to 70&#xb0; C., which comprises composition represented by the formula (I), and which has a particle diameter Dcorresponding to 50% of cumulative weight fraction of from 4 to 20 &#x3bc;m and a particle size distribution index (P) of P&#x3c;4.0:Mg(OCH)(OR)&#x2003;&#x2003;(I)where n is a numerical value satisfying 0&#x3c;n&#x3c;0.35, Ris CH, and m is an integer of from 3 to 10.

Magnesium compound, solid catalyst component, catalyst for ethylene polymerization and method of producing ethylene polymer

A magnesium compound represented by the formula (I):Mg(OCH)(OR)&#x2003;&#x2003;(I)where Ris CH(where m is an integer of from 3 to 10), and n is a numerical value satisfying 0&#x3c;n&#x3c;0.35; a solid catalyst component for olefin polymer using the magnesium compound; a catalyst for olefin polymer; and methods of producing olefin copolymers such as a propylene-based random copolymer and propylene-based block copolymer by using the catalyst for olefin polymer.

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Ichihara, Japan

Hideaki Noda