Mitsui Chemicals, Inc.

Tohcello Co., Ltd.

Mitsui Toatsu Chemicals, Incorporated

Yoshihisa Inoue

Yasunori Yoshida

Terunori Fujita

Yasuhiko Suzuki

Makoto Suzuki

Junji Saito

Usaji Takaki

Tadahito Nobori

Shinji Kiyono

Isao Hara

Kazumi Mizutani

Tomoaki Matsugi

Shigekazu Matsui

Yoshihiro Yamamoto

Yukihiro Takagi

Takashi Nakano

Hiroyoshi Watanabe

Akira Nomoto

Tomoyoshi Hakamata

Daisuke Fukuoka

Takaomi Hayashi

Kou Tsurugi

Shinobu Aoki

Naritoshi Yoshimura

Akira Matsuura

Osamu Nakamura

Yoshio Motoyama

Masumi Okita

Yasuko Ono

Miyuki Konno

Nobuhiro Tanabe

Kenji Shimamoto

Tuneyuki Ohkubo

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

Disclosed is an excellent gas barrier laminate whose gas-barrier property has little dependency on temperature and which hardly causes fracture even when the laminate is stretched. A gas barrier film comprising a polymer (A) of an unsaturated carboxylic acid compound monovalent metal salt (a), wherein the polymer (A) contains a modified vinyl alcohol polymer (B); a gas barrier laminate comprising a base layer and the gas barrier film formed on at least one surface of the base layer; and a method for production of a gas barrier laminate comprising the steps of: coating a solution of an unsaturated carboxylic acid compound monovalent metal salt (a) having a polymerization degree less than 20 on at least one surface of a base layer, wherein the solution contains a modified vinyl alcohol polymer (B); performing the polymerization to form a layer of the polymer (A) of the unsaturated carboxylic acid compound monovalent metal salt (a) containing the modified vinyl alcohol polymer (B).

Gas barrier film, gas barrier laminate and method for manufacturing film or laminate

A polymerization catalyst composition for a radically polymerizable monomer of the present invention comprises a transition metal-containing phosphazenium composition which is produced by mixing a phosphazenium compound with a compound of a transition metal belonging to Groups 4 to 12 in the periodic table and an organic halogen compound.

Polymerization catalyst composition and process for production of polymer

A process for producing a polar olefin copolymer comprises copolymerizing a non-polar olefin and a polar olefin in the presence of a transition metal compound selected from Groups 4, 5, 6 and 11 of the periodic table, which is represented by the following formula (IV): wherein M' is a transition metal atom selected from Groups 4, 5, 6 and 11 of the periodic table, m is an integer of 1 to 6, A is &#x2014;O&#x2014;, &#x2014;Si&#x2014;, &#x2014;Se&#x2014;, &#x2014;N(R)&#x2014;, n is a number satisfying a valence of M&#x2032;, Rto Rand Rare each a hydrogen atom, a halogen atom, a hydrocarbon group and the like, and X is a halogen atom, an oxygen atom, a hydrocarbon group and the like, and at least one compound (B) selected from the group consisting of an organometallic compound (B-1), an organoaluminum oxy-compound (B-2) and an ionic ionizing compound (B-3). Therefore, the process is capable of obtaining a polar olefin copolymer having excellent properties under mild polymerization conditions.

Process for producing polar olefin copolymer and polar olefin copolymer obtained thereby

A process for polymerizing an olefin is capable of polymerizing an olefin with excellent polymerization activity, and comprises polymerizing or copolymerizing an olefin at a polymerization reaction temperature of 50 to 200&#xb0; C. in the presence of a catalyst comprising a transition metal compound (A) represented by the following formula (I), a compound (B-1) having a reduction ability which reacts with the transition metal compound (A) to convert an imine structure moiety to a metal amide structure, and a compound (B-2) which reacts with the transition metal compound (A) to form an ion pair;wherein M is a transition metal atom of Groups 3 to 11 of the periodic table; m is an integer of 1 to 6; Y is O, S, Se, or &#x2014;C(R)&#x2014;; Rto Rmay be the same or different, and are each a hydrogen atom, a halogen atom, a hydrocarbon group, an oxgen-containing group, a nitrogen-containing group and the like; n is a number satisfying a valence of M; and X is a hydrogen atom, a halogen atom, a hydrocarbon group and the like.

Process for the polymerization olefins

Process for preparing an alkylcyclohexanol alkylene oxide adduct

An indigo compound is prepared from a corresponding indole compound which is unsubstituted at the 2- and 3- positions. The indole compound and an organic hydroperoxide are reacted in the presence of a catalyst which is a metal selected from the group consisting of the metals of Groups 4, 5 and 6 of the periodic table or a compound of the metal. The reaction is conducted while taking out water from a reaction system, said water being that introduced in the reaction system or formed during the reaction, or while controlling the amount of water, which is introduced in the reaction system, at a level not greater than 1 mole per mole of the indole compound.

Process for the preparation of indigo compounds

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Chiba, Japan

Yoshihisa Inoue