Mitsubishi Chemical Corporation

Kabushiki Kaisha Toshiba

Mitsubishi Kasei Corporation

Japan Polypropylene Corporation

Japan Polyethylene Corporation

Cornell University

Nippon Hoso' Kyokai

Fumihiko Shimizu

Naomasa Sato

Akio Tanna

Masato Onoe

Taro Shibagaki

Kazuyuki Hata

Teruaki Ashihara

Yoshinori Suga

Yasuo Maruyama

Eiji Tanaka

Fumiyoshi Yamada

Shixuan Xin

Geoffrey William Coates

Mitsuru Sugawara

Glenn H Fredrickson

Toru Suzuki

Yukihito Zanka

Shoichi Takahashi

Eiji Isobe

Masayuki Takami

Hisashi Ohtaki

Akitoshi Yoshinaga

Toshiya Seko

Kouichi Nakayama

Toshiaki Egashira

Fuminao Watanabe

Toshinori Kondo

Masatoshi Yorozu

Kiyoshi Yukawa

Yongwoo Shin

Glen H Ko

Kenji Mitsutani

Yongjun Jang

Sayohiko Ichiki

Seiji Kunishige

Fumio Fujioka

Akira Kuwahara

Kenjirou Takayanagi

Shiho Goromaru

Koushi Matsubara

Provided is a process of effectively producing an ethylene/unsaturated carboxylic acid copolymer having excellent mechanical and thermal properties. A process for producing an ethylene/unsaturated carboxylic acid copolymer comprises: producing an ethylene/unsaturated carboxylic acid ester copolymer from ethylene and unsaturated carboxylic acid ester using a late-transition-metal complex catalyst; and heating the ethylene/unsaturated carboxylic acid ester copolymer at a temperature capable of converting the ester group into a carboxylic acid group, thereby converting into the ethylene/unsaturated carboxylic acid copolymer.

Process for producing ethylene/unsaturated carboxylic acid copolymer, and said copolymer

The present invention relates to a thermoplastic elastomer composition which comprises a branched olefin copolymer comprising: a main chain of an ethylene/&#x3b1;-olefin copolymer; and a side chain derived from a crystalline propylene polymer containing a vinyl group at one end, wherein the content of &#x3b1;-olefin in the main chain is 70 mol % or less, the composition has an elongation at break of 500% or higher, and has an elastic recovery rate of 70% or more when recovering from an extension to 300% elongation, and a process for manufacturing the same.

Thermoplastic elastomer composition and process for manufacturing the same

A novel catalyst component for producing a crystalline &#x3b1;-olefin polymer or &#x3b1;-olefin/(meth)acrylate copolymer having few branches, especially a polymer having a high molecular weight, and a method for producing an &#x3b1;-olefin polymer or an &#x3b1;-olefin/(meth)acrylate copolymer using the catalyst component. A metal complex represented by the following general formula (D), as well as a method for producing an &#x3b1;-olefin polymer and a method for producing an &#x3b1;-olefin/(meth)acrylate copolymer using the metal complex. 

Metal complex and method for producing &#x3b1;-olefin polymer and method for producing &#x3b1;-olefin/(meth)acrylate copolymer using the same

To provide an aqueous dispersion of a resin wherein dispersed particles are stable with fine particle sizes and whereby bleeding out is suppressed, which is thus useful as e.g. a surface treating agent for a polyolefin substrate, an adhesive or a coating material. A resin dispersion having dispersed in water a polymer (C) having a hydrophilic polymer (B) bonded to a polyolefin (A) in a ratio of (A):(B)=100:5 to 100:500 (weight ratio); a method for producing the resin dispersion; and a coating material and a laminate, employing it.

Aqueous resin dispersion, method for its production, coating material and laminate

A polypropylene type aqueous dispersion comprising the following components (a) to (c): wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 &#x3bc;m, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond byC-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S/S) of an area Sof a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.6 ppm is expressed as S, 4+2S/S&#x3e;5, and Feature (2) a content ratio (mol ratio) of propylene unit (A): other olefin unit (B) is from 100:0 to 90:10.

Polypropylene type aqueous dispersion, polypropylene type composite aqueous emulsion composition and its use

This invention provides a graft modified polypropylene polymer which does not contain halogens, is excellent in certain properties such as solubility and can add good adhesiveness and coating ability to crystalline propylene polymer base materials, and a composition containing the same; and in particular, it provides a propylene polymer which contains a propylene polymer main chain having a stereo-block structure containing an isotactic block and a side chain containing a carboxylic acid group, an acid anhydride group or a carboxylic acid ester group, wherein when it is dissolved in toluene to a concentration of 10% by weight at 25&#xb0; C., the insoluble matter is 1% by weight or less based on the total polymer, and a composition containing the same.

Modified propylene polymer, composition containing the same and use thereof

An object of the present invention is to provide a novel propylene-based polymer capable of providing a propylene-based polymer with a good adhesion and coatability. The present invention lies in a propylene-based polymer having a propylene component with several characteristics including a weight-average molecular weight Mw from not smaller than 5,000 to less than 1,000,000 as measured by GPC, and Regio irregular units based on 2,1-inserted propylene monomer and/or 1,3-inserted propylene monomer present in its main chain and the sum of the ratio of regio irregular units based on 2,1-insertion and 1,3-insertion to all propylene insertions not smaller than 0.05%.

Propylene-based polymer

Soft propylene-based resin compositions, which comprise substantially the following block (I) and block (II):

Soft propylene-based resin composition

The present invention provides a propylene block copolymer comprising polymer particles whose rubber-like component contents are 50% by weight or more, in an amount less than 1.0% by weight of the whole polymer particles finally discharged from a polymerization system.

Propylene block copolymer

A process for continuously producing a propylene-based block copolymer having an excellent impact resistance of the present invention, comprises: a first polymerization step comprising polymerizing .alpha.-olefin comprising propylene in the presence of hydrogen and a stereoregular polymerization catalyst comprising a solid catalyst component containing magnesium, titanium, halogen atom and an electron-donor compound, an organoaluminum compound and, if required, an electron-donar compound in a single polymerization reactor; and a second polymerization step comprising transporting .alpha.-olefin polymer obtained in the first polymerization step to a copolymerization reactor and copolymerizing propylene with .alpha.-olefin other than propylene in a gas phase substantially in the presence of said stereoregular polymerization catalyst used in the first polymerization step.

Process for continuously producing propylene-based block copolymer

A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from the group consisting of clay, clay minerals, ion exchanging layered compounds, diatomaceous earth, silicates and zeolites, and (C) an organic aluminum compound.

Catalyst for polymerizing an olefin and method for producing an olefin

A process for producing an olefin polymer which comprises polymerizing an olefin or copolymerizing olefins in the presence of a catalyst comprising a novel solid catalyst component (A), an organometallic compound (B) and an electron donating compound (C) is disclosed. According to the process of the present invention, an olefin polymer excellent in stereospecificity and particle property can be obtained. The catalyst used in the process of the present invention shows a very slight lowering in polymerization activity during a long-term polymerization, and therefore, the productivity of an olefin polymer can be improved.

Process for producing olefin polymer

In a signal distribution system, a bus transmission path is provided on which at least one terminal of a pair of transmission lines terminates in a proper potential through a line-to-ground characteristic impedance Z.sub.0. A pair of differential output terminals of at least one transmission circuit are connected to the corresponding pair of transmission lines on the bus transmission path to deliver differential transmission signals of a fundamental frequency f as output signals. A pair of differential input terminals of a respective one of a maximal number of reception circuits, N, are connected to the corresponding pair of transmission lines through a corresponding pair of branch resistors. The input terminal of the respective reception circuit has a characteristic of an input impedance Z.sub.L given below:

Signal distribution system

An optical communication apparatus which comprises a printed circuit board, plural circuit elements fixed to the printed circuit board, the circuit elements having terminals extended to the printed circuit board, a photosensitive glass base fixed to the printed circuit board, various optical components accurately fixed to the glass base, the optical elements respectively having plural leads, and corresponding conductive members for electrically connecting the terminals of the circuit elements and the corresponding leads of the optical components, the conductive members each having a rigidity smaller than the rigidity of the corresponding leads of the optical components.

Optical communication apparatus with base for fixing elements

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Kanagawa, Japan

Fumihiko Shimizu