Mitsui Chemicals, Inc.

Prime Polymer Co., Ltd.

Mitsu Chemicals, Inc.

Yasushi Tohi

Toshiyuki Tsutsui

Terunori Fujita

Koji Kawai

Shigekazu Matsui

Ryoji Mori

Masahiko Okamoto

Makoto Mitani

Junji Saito

Haruyuki Makio

Hiromu Kaneyoshi

Koji Endo

Shigenobu Ikenaga

Masatoshi Nitabaru

Nobuo Kawahara

Masahiro Yamashita

Shiro Otsuzuki

Kiyoaki Sugi

Hiromasa Marubayashi

Takashi Nakagawa

Kenji Sugimura

Junichi Imuta

Mikio Hashimoto

Ken Yoshitsugu

Yoshiharu Kikuchi

Tomoaki Matsugi

Ikunori Sakai

Kotaro Ichino

Takashi Yukita

Takeshi Minoda

Keita Itakura

Tetsuji Kasai

Mikio Hosoya

Hideki Bando

Mitsunao Arino

Masayasu Yoshida

Yuichi Yamamura

Keisuke Shishido

Tatsuya Nakamura

Mamoru Takahashi

Yoshiho Sonobe

Hiroshi Noguchi

Munehito Funaya

Naoto Matsukawa

Naoshi Nagai

Sadahiko Matsuura

Ryousuke Kaneshige

Kazuoki Nakai

Takayuki Kajihara

Shota Abe

Kouji Nagahashi

Naomi Urakawa

Yasushi Yanagimoto

Kenji Michiue

Mayumi Hiwara

Naritoshi Hirota

Yasuyuki Harada

Kenji Iwamasa

Tomohiro Yamaguchi

Masamichi Naito

Shinichi Nagano

Hideki Hirano

Sunil Krzysztof Moorthi

Shiro Nakatsuka

Michio Toriumi

Yasuo Satoh

Masao Suzuki

Takahiro Akashi

Toru Takaoka

Junpei Tanaka

Masashi Higuchi

Yasuo Funabara

Yasuhiro Hasada

Yoshiyuki Hirase

Daisuke Tanifuji

Masatoshi Chinaka

Nobukazu Yamahira

Yuriko Iimura

Yasuo Ichiki

Keiko Takahashi

Chiemi Okawa, Legal Representative

Kazunori Okawa

Yusuke Sekioka

Naoya Akiyama

Toshio Fujita

Miyuki Konno

Shiegenobu Ikenaga

Keiko Fukushi

Kazunori Kamio

Junichi Yoshizono

A novel ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an &#x3b1;-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches,  The novel ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer, and a use thereof are provided.

Ethylene/&#x3b1;-olefin/non-conjugated polyene copolymer, and production process and use thereof

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

To provide a process for producing an olefin polymer, which makes it possible to use, as a solvent for use in the catalyst preparation and the like, an aliphatic hydrocarbon solvent instead of an aromatic hydrocarbon solvent causing large environmental burden, and which has good olefin polymerization activity. A process for producing an olefin polymer, characterized by having a step comprising feeding an olefin polymerization catalyst solution, which is obtained by mixing a metallocene compound, a compound that reacts with the metallocene compound to form an ion pair and at least one compound selected from an organoaluminum compound and an organoaluminum oxy compound with a saturated hydrocarbon solvent, to a polymerization reactor and solution-polymerizing an olefin in the polymerization reactor.

Process for producing olefin polymer

The propylene-based polymer composition of the present invention includes This polymer composition is excellent in transparency, low-temperature impact resistance, and mechanical properties (flexibility or rigidity, etc.) and also excellent in heat resistance.

Propylene-based polymer composition, use thereof, and method for producing thermoplastic polymer composition

According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.

Bridged metallocene compound, olefin polymerization catalyst containing the same, and ethylene polymer obtained with the catalyst

The invention provides a method for preventing fouling in chemical equipment, comprising adding an antifouling agent which comprises a polyoxyalkylene polymer having Mn of 30,000 or less to a component in the chemical equipment.

Method for preventing fouling in chemical equipment and antifouling agent

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

The present invention provides an ethylene polymer that has excellent fluidity and moldability as well as gives a molded product having excellent mechanical strength. The ethylene polymer of the present invention contains 0.02 to 1.50 mol % of a constitutional unit derived from &#x3b1;-olefin having 6 to 10 carbon atoms, and has the density of 945 to 975 kg/m, which satisfies both of the following requirements [1] and [2] simultaneously:

Ethylene polymer and use thereof

A process for producing an olefin polymer is provided, in which ethylene and at least one kind or more of monomers selected from &#x3b1;-olefins are polymerized by a high temperature solution polymerization in a temperature range between 120 and 300&#xb0; C., in the presence of an olefin polymerization catalyst composed of a bridged metallocene compound represented by general formula [I] described below and at least one kind or more compounds (B) selected from (b-1) an organoaluminum oxy-compound, (b-2) a compound capable of forming an ion pair in a reaction with the bridged metallocene compound mentioned above, and (b-3) an organoaluminum compound. According to the high temperature solution polymerization of the present invention, it has become possible to obtain a polymer having a high molecular weight with high polymerization activity that was so far unattainable, and when the polymer is a copolymer, it is a process for producing a high molecular weight olefin polymer with a large comonomer content, a narrow composition distribution, and a narrow molecular weight distribution.

Process for producing olefin polymers

Disclosed is a method for producing a syndiotactic propylene polymer having a syndiotactic pentad fraction (rrrr fraction) of not less than 85%, a melting point (Tm) within the range of 145-170&#xb0; C. and a limiting viscosity [&#x3b7;] within the range of 0.1-10 dl/g by a solution polymerization method using a group 4 crosslinked metallocene compound, which is not accompanied by precipitation of a polymer (excluding white turbidity). Also disclosed is a production method which enables to continuously perform such a production.

Process for production of syndiotactic propylene polymer

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

A composition having excellent transparency, flexibility, rubber elasticity, thermal resistance, impact resistance, abrasion resistance and the like, a composition having excellent rigidity and impact resistance as well as excellently balanced in whitening resistance, abrasion resistance and heat sealability, and a composition having excellent rubbery properties, thermal resistance, abrasion resistance and flexibility are provided. A composition comprising a specific propylene&#x2022;&#x3b1;-olefin copolymer for which, in a signal chart measured byC-NMR and predetermined such that the peak present at the highest magnetic field among the signals originating from CH (methine) of the constituent unit derived from an &#x3b1;-olefin having 4 to 20 carbon atoms is to be at 34.4 ppm, an absorption intensity A at about 22.0 to 20.9 ppm and an absorption intensity B at about 19.0 to 20.6 ppm satisfy the following relational expressions (i) and (ii) with respect to an absorption intensity C at about 19.0 to 22.0 ppm, which is assignable to propylene methyl:()&#xd7;100&#x2266;8&#x2003;&#x2003;(i), and()&#xd7;100&#x2267;60&#x2003;&#x2003;(ii),

&#x3b1;-olefin-based polymer composition, molded product formed from the composition, and novel polymer

A synthetic lubricating oil comprising an &#x3b1;-olefin (co)polymer defined by the features (i) to (v). Also, a lubricating oil composition including the above-mentioned synthetic lubricating oil and a low-viscosity base oil. The synthetic lubricating oil and the lubricating oil composition have high thermal oxidation stability and are excellent in viscosity index, low-temperature viscosity properties and shear stability.

Synthetic lubricating oil and lubricating oil composition

A process for producing an olefin polymer is provided, in which ethylene and at least one kind or more of monomers selected from &#x3b1;-olefins are polymerized by a high temperature solution polymerization in a temperature range between 120 and 300&#xb0; C., in the presence of an olefin polymerization catalyst composed of a bridged metallocene compound represented by general formula [I] described below and at least one kind or more compounds (B) selected from (b-1) an organoaluminum oxy-compound, (b-2) a compound capable of forming an ion pair in a reaction with the bridged metallocene compound mentioned above, and (b-3) an organoaluminum compound. According to the high temperature solution polymerization of the present invention, it has become possible to obtain a polymer having a high molecular weight with high polymerization activity that was so far unattainable, and when the polymer is a copolymer, it is a process for producing a high molecular weight olefin polymer with a large comonomer content, a narrow composition distribution, and a narrow molecular weight distribution. 

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Sodegaura, Japan

Yasushi Tohi