Mitsui Chemicals, Inc.

Prime Polymer Co., Ltd.

Masatoshi Chinaka

Yasushi Tohi

Ken Yoshitsugu

Tomoaki Matsugi

Naoto Matsukawa

Sadahiko Matsuura

Masakazu Tanaka

Toyoaki Sasaki

Naoya Akiyama

Toshio Fujita

A 4-methyl-1-pentene polymer particle (X) which satisfies the following requirements (X-a), (X-b) and (X-c): (X-a) being composed of a 4-methyl-1-pentene polymer which has a content of a constitutional unit derived from 4-methyl-1-pentene being 30.0 to 99.7% by mol, and a content of a constitutional unit derived from at least one olefin selected from ethylene and an &#x3b1;-olefin having 3 to 20 carbon atoms (except for 4-methyl-1-pentene) being 0.3 to 70.0% by mol; (X-b) having, when measured in a cross fractionation chromatograph apparatus (CFC) using an infrared spectrophotometer as a detector part, at least one peak A of an amount of a component eluted present in the range of 100 to 140&#xb0; C., and at least one peak B of an amount of a component eluted present at lower than 100&#xb0; C.; and (X-c) having a meso diad fraction (m) measured byC-NMR falling within the range of 95.0 to 100%.

4-methyl-1-pentene polymer particle and method for producing 4-methyl-1-pentene resin

An object of the present invention is to provide a method for producing an olefin polymer, with which an olefin polymer having good particle properties can be produced in high activity, fouling inside the polymerization vessel, such as a vessel wall or an impeller, can be effectively prevented, and a long-term stable operation is achieved. A method for producing an olefin polymer according to the present invention is characterized by including (co)polymerizing at least one olefin selected from the group consisting of ethylene and &#x3b1;-olefins having 3 to 20 carbon atoms in a polymerization vessel in the presence of (A) a solid catalyst component for olefin polymerization, (B) an aliphatic amide, and (C) an organoaluminum compound.

Method for producing olefin polymer

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Iwakuni, Japan

Masatoshi Chinaka