Patents by Inventor Eiichi Yonemitsu
Eiichi Yonemitsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4228258Abstract: 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.Type: GrantFiled: January 29, 1979Date of Patent: October 14, 1980Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Akitoshi Sugio, Masanobu Masu, Masaharu Kimura, Norio Sayama, Keiun Ko, Eiichi Yonemitsu
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Patent number: 4177247Abstract: 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.Type: GrantFiled: May 8, 1978Date of Patent: December 4, 1979Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Hiroshi Miyamori, Takanari Nawata, Tomio Fujioka, Akira Ito, Makoto Kobayashi
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Patent number: 4153644Abstract: 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.Type: GrantFiled: December 15, 1975Date of Patent: May 8, 1979Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Akitoshi Sugio, Masanobu Masu, Masaharu Kimura, Norio Sayama, Keiun Ko, Eiichi Yonemitsu
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Patent number: 4059582Abstract: 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.Type: GrantFiled: July 24, 1975Date of Patent: November 22, 1977Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Tomiya Isshiki, Yasuhiko Kijima
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Patent number: 4058504Abstract: 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.Type: GrantFiled: April 16, 1976Date of Patent: November 15, 1977Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Atuo Kuramoto, Hiroyuki Urabe
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Patent number: 4038343Abstract: 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.Type: GrantFiled: October 17, 1975Date of Patent: July 26, 1977Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Masanobu Masu, Takao Kawaki, Yukio Sasaki
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Patent number: 4024195Abstract: 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.Type: GrantFiled: October 15, 1975Date of Patent: May 17, 1977Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Shizuo Togo, Kenichiro Hashimoto, Tomoyuki Yui, Akihiko Sanada
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Patent number: 4013725Abstract: 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.Type: GrantFiled: May 6, 1975Date of Patent: March 22, 1977Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Takeo Igarashi, Naoto Osaki, Tetsuo Aoyama, Yukiya Nakazato
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Patent number: 4011200Abstract: 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.Type: GrantFiled: March 4, 1975Date of Patent: March 8, 1977Assignee: Mitsubishi Gas Chemical Co., Ltd.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takao Kawaki
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Patent number: 3989671Abstract: 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.Type: GrantFiled: February 22, 1974Date of Patent: November 2, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Tetsuo Tomita, Tadashi Yoshii, Akira Ito
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Patent number: 3978158Abstract: 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.Type: GrantFiled: February 26, 1974Date of Patent: August 31, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Seiichi Kamiyama, Toshiaki Kanada, Takeshi Hattori
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Patent number: 3970640Abstract: 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.Type: GrantFiled: June 26, 1974Date of Patent: July 20, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takao Kawaki, Akihiko Konishi, Zempei Mizutani
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Patent number: 3963804Abstract: 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.Type: GrantFiled: April 18, 1974Date of Patent: June 15, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takanari Nawata, Masanobu Masu, Masaharu Kimura, Norio Sayama
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Patent number: 3962180Abstract: 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.Type: GrantFiled: October 30, 1974Date of Patent: June 8, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Akihiko Konishi
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Patent number: 3954904Abstract: Polyphenylene ether resins are stabilized with a substituted dicarboxylic acid dihydrazide.Type: GrantFiled: October 30, 1974Date of Patent: May 4, 1976Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Takanari Nawata, Masao Okabe, Masatsugu Matsunaga, Masaharu Kimura, Norio Sayama
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Patent number: 3953529Abstract: A process for alkylating the ortho-position of a phenol compound which comprises bringing a phenol compound containing at least one hydrogen atom at its ortho-position and an alcohol into contact with a catalyst in the gaseous phase, said catalyst being selected from the group consisting ofA. a mixture of iron oxide and silica in which the atomic ratio of Fe to Si is 100 : 0.03 - 200, andB. a mixture of iron oxide, silica and chromium oxide in which the atomic ratio of Fe to Si to Cr is 100 : 0.1 - 5 : 0.1 - 5.Type: GrantFiled: June 4, 1974Date of Patent: April 27, 1976Assignee: Mitsubishi Gas Chemical Co. Inc.Inventors: Eiichi Yonemitsu, Shizuo Togo, Kenichiro Hashimoto, Muneo Ito, Chiharu Nishizawa, Noboru Hara
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Patent number: 3952072Abstract: Stabilized polyphenylene ether type resin composition obtained by compounding a polyphenylene ether type resin with one or more of stabilizer-component such as those respectively (a) a high molecular phosphorous ester having at least three phosphorous ester-bondings per molecule, (b) a high molecular phosphorous ester as said above and dicarboxylic acid dihydrazide substitution product, (c) a high molecular phosphorous ester as said above and steric hindered phenols and (d) a high molecular phosphorous ester as said above, steric hindered phenols and dicarboxylic acid dihydrazide substitution product; and, if desired, boron oxide.Type: GrantFiled: November 14, 1974Date of Patent: April 20, 1976Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Masanobu Masu, Masaharu Kimura, Masao Okabe, Norio Sayama, Masatsugu Matsunaga
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Patent number: 3933941Abstract: A thermoplastic blended composition comprising 15-80% by weight of polyphenylene ether, 5-60% by weight of a styrene resin and 2-15% by weight of an aromatic polycarbonate. The composition has superior heat resistance, fatigue resistance and processability.Type: GrantFiled: May 1, 1974Date of Patent: January 20, 1976Assignee: Mitsubishi Gas Chemical Co., Ltd.Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Masanobu Masu, Masaharu Kimura, Masao Okabe