Mitsui Chemicals, Inc.

Mitsui Toatsu Chemicals, Incorporated

Tohcello Co., Ltd.

Isao Hara

Usaji Takaki

Atsushi Shibahara

Tadahito Nobori

Shinji Kiyono

Katsuhiko Funaki

Takaomi Hayashi

Kazumi Mizutani

Yoshihiro Yamamoto

Shinobu Aoki

Kou Tsurugi

Kazumori Kawamura

Tatsuya Nakamura

Akiko Matsumoto

Shiori Hanada

Fumiaki Nishino

Yasuyuki Harada

Wataru Yamada

Setsuko Fujiyoshi

Toshihiro Muroto

Yoshihisa Inoue

Yasunori Saito

Tsuyoshi Matsumoto

Shoji Tamai

Keisuke Takuma

Makoto Suzuki

Tatsuhiro Urakami

Takashi Kuroki

Naoto Matsukawa

Katsuharu Miyata

Akira Hasegawa

Tetsuya Hamada

Yasushi Nakayama

Seiichi Ishii

Yasuhiko Suzuki

Hiroyoshi Watanabe

Naritoshi Yoshimura

Mitsuyuki Mizoguchi

Toshio Matsuhisa

Akira Nomoto

Shinsuke Kinoshita

Masahiro Toriida

Seiji Hasegawa

Toshiro Takao

Hiroyuki Sakayama

Akira Matsuura

Ritsuko Fukuda

Kuniyuki Takamatsu

Takaharu Abe

Tomoyoshi Hakamata

Isamu Sudo

Osamu Nakamura

Susumu Murata

Yoshiharu Hirose

Yoshiteru Taniguchi

Miyuki Konno

Hiromi Jouyama

Hiroharu Suzuki

Siori Hanada

Tuneyuki Ohkubo

An object of the invention is to provide a solid polyaluminoxane composition suitably used as a cocatalyst and a catalyst carrier in combination with an olefin oligomerization or polymerization catalyst, without the use of solid inorganic carriers such as silica. The solid polyaluminoxane composition of the invention includes a polyalkylaluminoxane and a trialkylaluminum, and has a solubility in n-hexane at 25&#xb0; C. of less than 0.50 mol % as measured by a specific method (i), a solubility in toluene at 25&#xb0; C. of less than 1.0 mol % as measured by a specific method (ii), and a 13 mol % or more molar fraction of alkyl groups derived from the trialkylaluminum moieties relative to the total number of moles of alkyl groups derived from the polyalkylaluminoxane moieties and the alkyl groups derived from the trialkylaluminum moieties as measured with respect to tetrahydrofuran-dsoluble components by a specific method (iii).

Solid polyaluminoxane composition, olefin polymerization catalyst, olefin polymer production method and solid polyaluminoxane composition production method

The objectives of the present invention are to provide an olefin oligomerization catalyst that allows properties of particles of a polymer component by-produced in an &#x3b1;-olefin production process to be obtained in such a shape that does not negatively affect a separation process for the particles and to provide a method for producing an olefin oligomer performed in the presence of the olefin oligomerization catalyst. The objectives can be achieved by the olefin oligomerization catalyst obtained by contacting (D) a transition metal compound with a preliminary contact solid catalyst component (II) obtained by contacting a solid catalyst component (I) formed by supporting (B) an organoaluminum oxy-compound (b-2) on (A) a solid carrier with (C) at least one compound selected from the group consisting of an organometallic compound (c-1), an organoaluminum oxy-compound (c-2), and a compound (c-3) that reacts with the transition metal compound (D) to form a pair of ion.

Catalyst for olefin multimerization and method for producing olefin multimer in presence of catalyst for olefin multimerization

A method for producing a solution containing at least an unsaturated carboxylic acid-modified vinyl alcohol polymer is characterized by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound in the presence of an acid catalyst soluble in the reaction system or a solid acid catalyst, and a gas barrier film is obtained by using the same. An example thereof is a method for producing a solution (A) containing an unsaturated carboxylic acid-modified vinyl alcohol polymer (b), the method comprising following two steps of: (1) a reaction step in which the unsaturated carboxylic acid-modified vinyl alcohol polymer (b) is formed by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound (a) in the presence of an acid catalyst soluble in the reaction system; and (2) an ion exchange step in which at least the acid catalyst of acidic compounds is removed by an anion exchange resin.

Method for producing unsaturated carboxylic acid-modified vinyl alcohol polymer, and gas barrier film or gas barrier laminate using the same

The invention provides transition metal complex compounds, high-activity olefin oligomerization catalysts containing the compounds, and olefin oligomerization processes using the catalysts. A transition metal complex compound [A] according to the invention is represented by Formula (I) or Formula (I') below. An olefin oligomerization catalyst includes the transition metal complex compound [A]. In an olefin oligomerization process of the invention, an olefin is oligomerized in the presence of the catalyst. 

Transition metal complex compounds, olefin oligomerization catalysts including the compounds, and processes for producing olefin oligomers using the catalysts

There are disclosed, a polyether ketone having a primary particle size of 50 &#x3bc;m or less; and a method of producing a polyether ketone by a desalting polycondensation, which contains a step of conducting a polymerization reaction under a condition of deposition of the polymer. The polyether ketone obtained by the present invention has small particle size, high molecular weight and sufficiently small content of impurities such as alkali metal components.

Polyether ketone and method of producing the same

The purpose of the present invention is to provide polymerization catalyst which can produce quite efficiently (co)polymer having number average molecular weight and number of molecules which are accurately controlled in producing method of (co)polymer by the polymerization of polar unsaturated compound, and provide living polymerized (co)polymer obtained according to the producing method. For the purpose, polymerization catalyst composition which comprises the composition comprising organic oxysalt compound and hydroxycarbonyl compound having at least both an alcoholic hydroxyl group and a carbonyl group in the same molecule is provided and the polar unsaturated compound is polymerized by using the polymerization catalyst composition. The composition containing the obtained (co)polymer were able to provide thermosetting powder coating composition having particularly excellent characteristics.

Process for the production of living (co)polymers and use of the (co)polymers

Method for preparing living polymer in the presence of phosphazenium salt

Process for preparation of substituted aromatic compound

A process for preparing phosphine oxides by reacting iminophosphoranes with phosphorus oxytrichloride by which highly purified phosphine oxides can be obtained industrially in a higher yield. Specifically, phosphine oxides are prepared in such a manner that iminophosphoranes are reacted with phosphorus oxytrichloride using an aprotic organic solvent with permittivity 2.2 or more at 20&deg; C. as a solvent under special reaction conditions to give a liquid reaction product containing phosphine oxides and aminophosphonium chlorides which are yielded as a by-product at the same time as the phosphine oxides, and the above described chlorides are removed from the above described liquid reaction product by a solid-liquid separation process, and the solution having been subjected to the solid-liquid separation process is washed with water.

Process for preparing phosphine oxides and process for purifying the same

There are herein disclosed a poly&lcub;1-(1-alkoxyalkoxy)-4-(1-methylethenyl)benzene&rcub; having a narrow molecular weight distribution, for example, a poly&lcub;1-(1-alkoxyethoxy)-4-(1-methylethenyl)benzene&rcub; or a poly&lcub;1-(2-tetrahydrofuranyloxy)-4-(1-methylethenyl)benzene&rcub; which is useful as a chemical amplification type positive resist material; a preparation process of the polymer which comprises reacting industrially easily available 4-(1-methylethenyl)phenol with a vinyl ether to produce an alkoxyalkoxy compound, and then carrying out an anionic polymerization; and a preparation process of poly&lcub;4-(1-methylethenyl)phenol&rcub; having a narrow molecular weight distribution useful as a tease polymer for a chemical amplification type positive resist material which comprises reacting the above-mentioned polymer with a protonic acid in the presence of an organic solvent.

Poly&lcub;1-(1-alkoxyalkoxy)-4-(1-methylethenyl)benzene&rcub; having narrow molecular weight distribution, its preparation process, and preparation process of poly&lcub;4-methylethenyl)phenol&rcub; having narrow molecular weight distribution

There is provided a process for preparing a poly(alkylene oxide) by using a polymerization initiator which does not cause any problem on preparing and handling in the preparation of the polyalkylene oxide by polymerizing an alkylene oxide compound and does not require a special treatment before the initiation of the polymerization. That is, it is a process of polymerizing the alkylene oxide compound in the presence of a phosphine oxide compound represented by the formula (1):

Process for preparing poly(alkylene oxide)

The compound &lsqb;tris(dimethylamino)phosphonioamino&rsqb;tris&lsqb;tris(dimethylamino)phosphoranylideneamino&rsqb;phosphonium dichloride can be prepared by contacting hydrogen chloride with tetrakis&lsqb;tris(dimethylamino)phosphoranylideneamino&rsqb;phosphonium chloride. The phosphonium dichloride compound can be used in a process wherein it is brought into contact with an OH,-form ion exchange resin to prepare tetrakis&lsqb;tris(dimethylamino)phosphoranylideneamino&rsqb;phosphonium hydroxide. Separate processes for separating or isolating the phosphonium chloride compound or isolating the phosphonium hydroxide compound from feed solutions wherein an extraction step is used are also set forth.

&lsqb;Tris(dimethylamino)phosphonioamino&rsqb;tris&lsqb;tris(dimethylamino)phosphoranylideneamino&rsqb;phosphonium dichloride and preparation process thereof

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Ninomiya-machi, Japan

Isao Hara