Mitsui Chemicals, Inc.

Mitsui Petrochemical Industries, Ltd.

Kenji Sugimura

Toshiyuki Tsutsui

Mamoru Kioka

Yasushi Tohi

Ken Yoshitsugu

Junji Saito

Mamoru Takahashi

Hiroshi Hoya

Koji Matsunaga

Kuniaki Kawabe

Takashi Nakagawa

Akinori Etoh

Yoji Hayakawa

Kunihiko Mizumoto

Mai Kurihara

Toshiyuki Itou

Shinichirou Asao

Masayoshi Sutou

Terunori Fujita

Takashi Ueda

Junichi Imuta

Tetsunori Shinozaki

Satoru Moriya

Shinichi Kojoh

Naoshi Nagai

Yasushi Nakayama

Atsushi Morita

Tetsuo Hayashi

Motoyasu Yasui

Yasuhiko Suzuki

Hideki Bando

Shinya Matsunaga

Norio Kaneshige

Kazuoki Nakai

Yasuyuki Harada

Shiro Nakatsuka

Masahiro Kishine

Teruhisa Kojima

Shin-ya Matsunaga

Yasuhiro Kai

Kazuto Sugiyama

Nobuhisa Mikawa

Mineo Kubo

Kiyotaka Yorozu

Akiyoshi Taguchi

[Object] To provide a resin composition with excellent mold releasability and blocking resistance. [Solution] A resin composition containing a 4-methyl-1-pentene polymer includes 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B) per 100 parts by mass of at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the 4-methyl-1-pentene polymer (B) has (B1) an intrinsic viscosity [&#x3b7;] of 0.01 or more but less than 0.50 dl/g measured at 135&#xb0; C. in a decalin solvent.

4-methyl-1-pentene polymer, resin composition containing 4-methyl-1-pentene polymer, masterbatch thereof, and formed product thereof

There are provided a polyolefin resin composition having excellent mechanical properties and thermal resistance; a film formed of the polyolefin resin composition, which has excellent mechanical properties and thermal resistance and which is less likely to suffer from fisheyes; a microporous membrane having excellent permeability and shutdown properties in addition to the above-mentioned physical properties; and applications thereof. Such objects are accomplished by a polyolefin resin composition containing an ultra-high molecular weight ethylene polymer (A), a 4-methyl-1-pentene polymer or 3-methyl-1-pentene polymer (B), and a polymer of an olefin having 2 to 12 carbon atoms (C) at an intended ratio.

Polyolefin resin composition and applications thereof

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

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

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. 

Crystalline polypropylene contains components insoluble in 64&deg; C. decane satisfying the characteristics involving intrinsic viscosity; Mz/Mn; pentadvisotacticity, D value and Mw/Mn, are excellent in hardness and rigidity, high in melt tension, and excellent in molding properties. Processes for preparing such crystalline polypropylenes, and polypropylene compositions and thermoformed products that contain such crystalline polypropylenes are also described. The number-average molecular weight Mn of the components insoluble in 64&deg; C. decane is preferably 25000 or more.

Crystalline polypropylenes, process for preparing thereof, polypropylene compositions, and thermoformed products

The present invention is intended to obtain an ethylene copolymer composition having excellent transparency, mechanical strength and moldability. The ethylene copolymer composition comprises an ethylene/&agr;-olefin copolymer and high-pressure radical process low-density polyethylene. The ethylene/&agr;-olefin copolymer is a copolymer of ethylene and an &agr;-olefin of 6 to 8 carbon atoms and has the following properties: the melt tension (MT) and the melt flow rate (MFR) satisfy the relation 9.0&times;MFR,>MT>2.2&times;MFR,; the activation energy ((E,)&times;10,J/molK) of flow, the carbon atom number (C) of the &agr;-olefin in the copolymer and the &agr;-olefin content (x mol %) in the copolymer satisfy the relation (0.039Ln(C&minus;2)&plus;0.0096)&times;x&plus;2.87<Ea&times;10,&lE;(0.039Ln(C&minus;2)&plus;0.1660)&times;x&plus;2.87; and the haze of an inflation film produced from said copolymer satisfies a specific relation. This ethylene copolymer composition can be used for producing molded products such as films, sheets, packaging materials, injection molded products, expansion molded products and fibers. These molded products are excellent in mechanical strength, heat resistance or transparency.

Ethylene copolymer composition and uses thereof

The present invention provides olefin polymerization catalysts which can produce olefin polymers with excellent polymerization activity and an olefin polymerization method using the catalyst, wherein the catalyst comprises a transition metal amide compound represented by general formula (I) below:

Olefin polymerization catalyst and process for producing olefin polymers

Ethylene/C,alpha-olefin copolymers are characterized by melt tension, flow activation energy and haze. The copolymers have excellent moldability and produce films of excellent transparency and mechanical strength.

Ethylene/&agr;-olefin copolymer and process for preparing the same

Olefin polymerization catalyst, olefins polymerization methods, and

Disclosed is a solid titanium catalyst component for olefin polymerization comprising magnesium, titanium, halogen, and (C) a phthalic diester represented by the following structural formula (i): ##STR1## wherein R is a branched hydrocarbon group of 7 carbon atoms, and two or R may be the same as or different from each other. Also disclosed are a process for preparing the solid titanium catalyst component, an olefin polymerization catalyst containing said solid titanium catalyst component and a process for olefin polymerization using the olefin polymerization catalyst. According to the present invention, the olefin polymer having high stereoregularity can be produced in a prominently high yield per catalyst unit.

Solid titanium catalyst component for olefin polymerization, process for

Process for preparing olefin polymer

In accordance with the present invention, there are provided olefin polymerization catalysts comprising

Olefin polymerization catalyst and process for the polymerization of

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Iwakuni, Japan

Kenji Sugimura