Mitsui Chemicals, Inc.

Idemitsu Petrochemical Co., Ltd.

Mitsu Chemicals, Inc.

Takashi Nakagawa

Ryoji Mori

Mamoru Takahashi

Masahiko Okamoto

Hiromasa Marubayashi

Akira Todo

Yasushi Tohi

Shigenobu Ikenaga

Kouji Nagahashi

Kouji Tomita

Kenji Okamoto

Ken Yoshitsugu

Kenji Sugimura

Tetsuji Kasai

Satoshi Akiyama

Hideaki Mimaki

Tatsuya Nakamura

Takashi Yukita

Yuichi Ito

Shinji Tanaka

Shiro Otsuzuki

Mamoru Kagami

Kouichi Kodoi

Yuichi Yamamura

Mayumi Hiwara

Takayuki Kajihara

Naritoshi Hirota

Masakazu Jitsukata

Tomohiro Yamaguchi

Toshihide Yoshitome

Masashi Higuchi

Yasuo Ichiki

Shiegenobu Ikenaga

Miyuki Konno

Akira Mitsui Chemicals Inc Todo

Akira c/o Mitsui Chemicals Inc Todo

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

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

[Task] To provide a solar battery sealing material obtained by using an olefin-based (co)polymer, which is excellent in flexibility, stress-absorbing property, transparency, and impact-resistant strength at low temperature, and with which the productivity is improved by omitting a cross-linking treatment if necessary. [Solving Means] A solar battery sealing material containing 1 to 40 parts by weight of polypropylene (i) which has a propylene unit of more than 90 mol %; and 60 to 99 parts by weight of a propylene.ethylene-based copolymer (ii) which has a propylene unit of 45 to 90 mol %, an ethylene unit of 10 to 25 mol %, and an &#x3b1;-olefin unit (a) having 4 to 20 carbon atoms of 0 to 30 mol % ((i)+(ii)=100 parts by weight). The solar battery sealing material further contains 5 to 95 parts by weight of an ethylene.&#x3b1;-olefin copolymer (B), based on 95 to 5 parts by weight of the total amount of (i) and (ii) ((i)+(ii)+(B)=100 parts by weight).

Sealing material for solar battery, sheet for sealing solar battery, and solar battery module using the same

A material for vibration control of the invention includes a propylene polymer (A) containing a constitutional unit (a) derived from propylene in the proportion of 40 to 100 mol % and a constitutional unit (b) derived from &#x3b1;-olefin having 2 to 20 carbon atoms excluding propylene in the proportion of 60 to 0 mol % [provided that the total of (a) and (b) is 100 mol %], and having a melting point measured by DSC of 90&#xb0; C. or below or no observed melting point, and the material has excellent vibration controllability such as vibration damping property, vibration preventing property, sound insulating property, and sound absorbing property.

Material for vibration control, article for vibration control and multilayer laminate for vibration control

The present invention provides a propylene polymer composition having excellent transparency, flexibility, heat resistance, scratch resistance and rubber elasticity with a good balance. The propylene polymer composition comprises 1 to 40 parts by weight of isotactic polypropylene (i) and 60 to 99 parts by weight of a propylene/ethylene/&#x3b1;-olefin copolymer (ii) which contains 45 to 89% by mol of a propylene component, 10 to 25% by mol of an ethylene component, and optionally, 0 to 30% by mol of constituent units (a) derived from an &#x3b1;-olefin of 4 to 20 carbon atoms.

Propylene polymer compositions and uses thereof

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

The present invention proposes a molded product having excellent moldability and ability to be processed into parts, as well as excellent scratch resistance. The invention provides a multilayered laminate composed of two or more layers, having a structure in which a layer (I) comprising at least one selected from an olefinic thermoplastic elastomer composition (A) and an olefinic resin (B), and a layer (II) comprising an olefinic thermoplastic elastomer composition (C) are laminated. The olefinic thermoplastic elastomer composition (C) is a composition comprising [1] a specific syndiotactic polypropylene copolymer (c), and [2] at least one selected from a polypropylene resin (d) and an olefinic thermoplastic elastomer (e).

Olefinic thermoplastic elastomer laminate

The invention provides a propylene polymer composition well balanced and excellent in transparency, flexibility, heat resistance, scratch resistance and rubber elasticity, and a medical tube made from the propylene polymer composition. The propylene polymer composition satisfies all the following properties (A), (B), (C) and (D): (A) the composition shows a loss tangent (tan &#x3b4;) peak at a temperature in the range of &#x2212;20 to 25&#xb0; C. according to dynamic viscoelasticity measurement (10 rad/s) in a torsion mode, and the peak is 0.5 or above; (B) the storage elastic modulus G' at 20&#xb0; C. from the dynamic viscoelasticity measurement is in the range of 1.0&#xd7;10to 4.9&#xd7;10dyn/cm; (C) the penetration temperature (&#xb0; C.) determined in accordance with JIS K 7196 is in the range of 60 to 160&#xb0; C.; and (D) the composition has a permanent set of not more than 30% as determined after the composition fixed between chucks 30 mm apart is 100% strained at a stress rate of 30 mm/min, maintained for 10 minutes and released for 10 minutes. The medical tube is made from the propylene polymer composition.

Propylene polymer composition and use thereof

A syndiotactic propylene-based polymer composition which retains the inherent features of the conventional non-crosslinked or partially crosslinked olefin-based thermoplastic elastomer, and also has excellent abrasion resistance and flexibility. The syndiotactic propylene-based polymer composition comprises 1 to 40 parts by weight of the syndiotactic polypropylene (B), and 5 to 60 parts by weight of the syndiotactic structured propylene-&#x3b1;-olefin copolymer (C) comprising 95 to 65 mol % of a syndiotactic structured propylene component and 5 to 35 mol % of an &#x3b1;-olefin (except propylene) component having 2 to 20 carbon atoms, based on 100 parts by weight of the non-crosslinked or partially crosslinked olefin-based thermoplastic elastomer (A).

Syndiotactic propylene polymer composition

Adamantane derivative

Process for manufacturing an extruded article and an extruded article

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

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

There is disclosed a process for prevention the polymerization of a vinyl compound selected from acrylic acid and methacrylic acid which comprises allowing at least one corrosion inhibitive substance selected from an alcohol and inorganic acid or salt thereof, an aromatic carboxylic acid or salt thereof and a zinc-containing salt to coexist with a metallic salt of dithiocarbamic acid, in prevention the polymerization of the vinyl compound with the metallic salt of dithiocarbamic acid.

Process for preventing polymerization of vinyl compound

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Ichihara, Japan

Takashi Nakagawa