Mitsui Chemicals, Inc.

Naritoshi Hirota

Munehito Funaya

Koji Kawai

Ryoji Mori

Nobuo Kawahara

Norio Kashiwa

Keiji Okada

Yasushi Tohi

Shigenobu Ikenaga

Shinichi Kojoh

Masahiko Okamoto

Hiromu Kaneyoshi

Hiromasa Marubayashi

Yuichi Yamamura

Mayumi Hiwara

Tatsuya Nakamura

Koji Endo

Hiroshi Hoya

Tomoaki Matsugi

Takashi Yukita

Takashi Nakagawa

Norihide Inoue

Keita Itakura

Shiro Otsuzuki

Toshiyuki Hirose

Shingo Matsuo

Kouichi Kizu

Hideyuki Kaneko

Tooru Tanaka

Takayuki Kajihara

Hiroshi Nishikawa

Kouji Nagahashi

Satoshi Hashizume

Tomohiro Yamaguchi

Shuji Matsumura

Nobuhisa Mikawa

Masashi Higuchi

Yasuo Ichiki

Shiegenobu Ikenaga

Ayako Kadosaka

Yoshio Sasaki

Miyuki Konno

A catalyst for olefin polymerization, comprising: wherein in Formula [1-1], R, R, R, R, R, R, R, and Rare each selected from a hydrogen, a hydrocarbon group and a silicon-containing group; the four groups of R, R, R, and Rare not hydrogen atoms, and are each selected from a hydrocarbon group or a silicon-containing group; Rand Rare each a hydrocarbon group or the like, excluding a hydrogen atom and a methyl group; M is Ti, Zr or the like; Y is carbon or the like; Q is a halogen or the like; and j is an integer from 1 to 4.

Catalyst for olefin polymerization, method for producing olefin polymer, method for producing propylene-based copolymer, propylene polymer, propylene-based polymer composition, and use of those

A high molecular weight propylene polymer exhibiting high stereoregularity (isotactic) and high position selectivity can be effectively produced by polymerizing at least one monomer selected from propylene, &#x3b1;-olefins and polyenes in the presence of a catalyst for olefin polymerization comprising:

Process for producing propylene polymer

Provided is a transition metal compound represented by the general formula [III]:  

Fluorene derivative, transition metal compound, catalyst for olefin polymerization, and process for producing olefin polymer

A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to 50% by weight of a constituent unit derived from at least one olefin selected from olefins having 2 to 20 carbon atoms except 4-methyl-1-pentene, and having the following properties: i) the diad isotacticity is 70% or greater, ii) the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5, and iii) the intrinsic viscosity [&#x3b7;] is 0.5 (dl/g) or greater.

Olefin-based polymers and uses thereof

A transition metal compound represented by the following formula (2a): 

Propylene copolymer, polypropylene composition and uses thereof, transition metal compound and olefin polymerization catalyst

A propylene/1-butene random copolymer containing 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75&#xb0; C. and a crystallization rate at 45&#xb0; C. of 10 minutes or less, and satisfying the following relation, 146 exp (&#x2212;0.022M)&#x2267;Tm&#x2267;125 exp (&#x2212;0.032M), and an olefin catalyst for preparation thereof.

Propylene copolymer, polypropylene composition, and uses thereof, transition metal compounds and catalyst for olefin polymerization

Growing community of inventors

Takaishi, Japan

Naritoshi Hirota