Mitsui Chemicals, Inc.

Susumu Murata

Naoto Matsukawa

Yasushi Nakayama

Yasunori Yoshida

Terunori Fujita

Makoto Mitani

Junji Saito

Isao Hara

Atsushi Shibahara

Tetsuya Hamada

Seiichi Ishii

Yasuhiko Suzuki

Naritoshi Yoshimura

Shinsuke Kinoshita

Takayuki Onogi

Kou Tsurugi

Kazumori Kawamura

Fumiaki Nishino

Takeshi Karino

Yasunori Saito

A method of production of ethylene-based polymer particles includes the steps of: homopolymerizing ethylene or copolymerizing ethylene and a linear or branched &#x3b1;-olefin having 3 to 20 carbon atoms in the presence of an olefin polymerization catalyst including: (A) fine particles having an average particle diameter greater than or equal to 1 nm and less than or equal to 300 nm obtained at least by the following two steps: (Step 1) causing contact between a metal halide and an alcohol in a hydrocarbon solvent; (Step 2) causing contact between a component obtained by (Step 1) and an organoaluminum compound and/or an organoaluminumoxy compound; and (B) a transition metal compound represented in General Formula (I) or (II), and (E) an intrinsic viscosity [&#x3b7;] of the ethylene-based polymer particles, measured in decalin at 135&#xb0; C., is from 5 to 50 dL/g.

Method of production of ethylene-based polymer particles and stretch-molded article obtained from ethylene-based polymer particles

To provide capsular fine particles comprising an olefinic polymer which have a uniform particle size distribution and a uniform particle size, and which are spherical and free from the coagulation between particles. Capsular fine particles comprising the olefinic polymer, of which the ratio (L/M) of the outer diameter (L) to the inner diameter (M) is 1.1 to 6.0, and the average diameter is 0.6 to 40 &#x3bc;m.

Capsular fine particle comprising olefinic polymer

The invention provides transition metal complex compounds, high-activity olefin oligomerization catalysts containing the compounds, and olefin oligomerization processes using the catalysts. A transition metal complex compound [A] according to the invention is represented by Formula (I) or Formula (I') below. An olefin oligomerization catalyst includes the transition metal complex compound [A]. In an olefin oligomerization process of the invention, an olefin is oligomerized in the presence of the catalyst. 

Transition metal complex compounds, olefin oligomerization catalysts including the compounds, and processes for producing olefin oligomers using the catalysts

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Ichihara, Japan

Susumu Murata