Mitsubishi Gas Chemical Company, Inc.

Eiichi Yonemitsu

Akitoshi Sugio

Masanobu Masu

Masaharu Kimura

Norio Sayama

Takao Kawaki

Masao Okabe

Takanari Nawata

Shizuo Togo

Keiun Ko

Akihiko Konishi

Masatsugu Matsunaga

Kenichiro Hashimoto

Makoto Kobayashi

Tomoyuki Yui

Akira Ito

Tetsuo Aoyama

Tomiya Isshiki

Chiharu Nishizawa

Yasuhiko Kijima

Tetsuo Tomita

Muneo Ito

Toshiaki Kanada

Yukio Sasaki

Hiroyuki Urabe

Tomio Fujioka

Noboru Hara

Tadashi Yoshii

Seiichi Kamiyama

Hiroshi Miyamori

Yukiya Nakazato

Naoto Osaki

Takeshi Hattori

Zempei Mizutani

Atuo Kuramoto

Akihiko Sanada

Takeo Igarashi

A novel resin composition improved in moldability and impact resistance, comprising (A) a polyphenylene oxide having a molecular weight of 5,000 or higher, (B) an aromatic hydrocarbon-formaldehyde resin or a modified aromatic hydrocarbon-formaldehyde resin, and, if necessary, (C) a rubbery polymer, the weight ratio of the resin (A) to the resin (B) being from 10:90 to 99:1 and the amount of the rubbery polymer (C) being 3 to 40 parts by weight per 100 parts by weight of the sum of the resins (A) and (B). This resin composition has excellent mechanical and electrical properties of the polyphenylene oxide together with an improved moldability, impact resistance, and adhesiveness.

Resin composition containing polyphenylene oxide

Dithionites are produced by reacting hydroquinones with bisulfites, pyrosulfites, alkyl sulfites, or aryl sulfites, substances capable of forming these salts upon reacting with sulfur dioxide or sulfurous acid, and sulfur dioxide or sulfurous acid.

Process for producing dithionites

Adenine is prepared by reacting at least one member selected from the class of diaminomaleonitrile and diaminofumaronitrile, a formic acid derivative and at least one member selected from the class of ammonia and ammonium salts in the presence or absence of a solvent.

Process for preparing adenine

In the production of polyphenylene ethers by oxidative polycondensation of phenols in the presence of a complex catalyst, an aminocarboxylic acid derivative and a reducing agent are simultaneously added to the reaction mixture when the resulting polyphenylene ether has attained the desired degree of polymerization, thereby to terminate the polymerization and simultaneously purify the reaction mixture. Hence, a stable purified polymer can be obtained.

Process for terminating polyphenylene ethers reactions with amino

A resin composition comprising (A) 5 to 95 parts by weight of a copolyphenylene ether derived from a mixture of 50 to 98 mole% of a 2,6-dialkylphenol and 2 to 50 mole% of a 2,3,6-trialkylphenol and (B) 5 to 95 parts by weight of a styrene resin. The composition has superior thermal resistance and oxidation stability under heat and satisfactory mechanical properties, and retains these desirable properties after heat-aging. The composition is suitable for preparation of molded articles.

Resin composition containing copolyphenylene ether

A process for alkylating the ortho-position of a phenol compound which comprises catalytically reacting a phenol compound containing at least one hydrogen atom at its ortho-position with an alcohol in the gaseous phase, characterized by that the catalyst containing iron oxide, silica, chromium oxide and one or more of alkali metal compound is used.

Process for alkylating the ortho-position of phenol compounds

A process for preparing hydroperoxide by autoxidizing secondary alkyl group-substituted methylbenzenes in the presence of water comprises using as a catalyst a water-soluble chelate compound in which multidentate ligands are coordinated to at least one member selected from the class of cobalt, nickel, manganese, copper and iron.

Process for preparing hydroperoxide

A polyphenylene ether random copolymer excelling in heat resistance and resistance to solvents, said copolymer being composed of 50-98 mol% of a structural unit of the formula ##STR1## derived from 2,6-dimethyl phenol and 50-2 mol% of a structural unit of the formula ##STR2## derived from 2,3,6-trimethylphenol, each of said structural units being randomly arranged in the polymeric structure, said copolymer having an intrinsic viscosity, as measured in chloroform at 25.degree. C., of at least 0.3 dl/g.

Novel polyphenylene ether and process for preparing the same

Polyphenylene oxides, self-condensation products of phenols, are produced through oxidative coupling by employing a novel catalyst system which comprises a copper compound, an iodine compound and tertiary diamine which is capable of forming a stable chelate ring with the copper compound. According to this invention, copper compounds, which hitherto have been considered to be unsuitable for using with tertiary amines, act with excellent performance as a component of the catalyst.

Process for producing polyphenylene oxides

A thermoplastic resin composition having excellent mechanical and thermal properties as well as excellent moldability comprising a bis(hydroxyaryl)alkanic polycarbonate and a rubber-modified polychlorostyrenic resin prepared by latex-blending a chlorostyrenic graft polymer latex and a chlorostyrenic copolymer latex.

Thermoplastic resin compositions

Polyphenylene ethers, self-condensation products of phenols, having desired polymerization degree are prepared by a process which comprises terminating the reaction by adding simultaneously at least one member selected from the class consisting of dioxybenzenes and/or benzoquinones and a reducing agent to the reaction medium at the stage of the desired polymerization degree in the oxidative polycondensation of phenols in the presence of a complex catalyst.

Process for the production of polyphenylene ethers having a  desired

A thermoplastic blend composition having especially superior impact strength and fatigue resistance comprising 15 ro 80% by weight of a polyphenylene oxide, 16 to 75% by weight of a rubber-modified polystyrene, 2 to 15% by weight of an aromatic polycarbonate and 2 to 15% by weight of a high styrene rubber, the sum total of the proportions of these ingredients being 100% by weight.

Thermoplastic blend composition

Polyphenylene oxides of low molecular weight are produced by oxidative polymerization of phenols in the presence of a catalyst and the amount of solvent is limited and the phenols are not added to the reaction medium at one time, but continuously over a certain period of time.

Process for polymerizing phenols to produce polyphenylene oxides of low

Polyphenylene ether resins are stabilized with a substituted dicarboxylic acid dihydrazide.

Growing community of inventors

Kashiwa, Japan

Eiichi Yonemitsu