Patents by Inventor Mitsuo Yamanaka
Mitsuo Yamanaka 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: 9012537Abstract: There may be provided a process for producing a polyimide siloxane solution composition having a further improved long-term viscosity stability; and a polyimide siloxane solution composition. In the process for producing the polyimide siloxane solution composition by polymerizing/imidizing a tetracarboxylic acid component and a diamine component consisting of (a) a diaminopolysiloxane, (b) a diamine having a polar group and (c) a diamine other than (a) and (b) in a solvent, the tetracarboxylic acid component and the diamine component excluding (b) the diamine having a polar group are polymerized/imidized to provide a reaction mixture solution, and then (b) the diamine having a polar group is added to the reaction mixture solution last, and the mixture is polymerized/imidized.Type: GrantFiled: August 17, 2010Date of Patent: April 21, 2015Assignee: Ube Industries, Ltd.Inventors: Susumu Takasaki, Hiroo Yamashita, Seiichirou Takabayashi, Tomoko Hayashida, Mitsuo Yamanaka, Takafumi Hirakawa
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Publication number: 20120157574Abstract: There may be provided a process for producing a polyimide siloxane solution composition having a further improved long-term viscosity stability; and a polyimide siloxane solution composition. In the process for producing the polyimide siloxane solution composition by polymerizing/imidizing a tetracarboxylic acid component and a diamine component consisting of (a) a diaminopolysiloxane, (b) a diamine having a polar group and (c) a diamine other than (a) and (b) in a solvent, the tetracarboxylic acid component and the diamine component excluding (b) the diamine having a polar group are polymerized/imidized to provide a reaction mixture solution, and then (b) the diamine having a polar group is added to the reaction mixture solution last, and the mixture is polymerized/imidized.Type: ApplicationFiled: August 17, 2010Publication date: June 21, 2012Applicant: UBE INDUSTRIES, LTD.Inventors: Susumu Takasaki, Hiroo Yamashita, Selichirou Takabayashi, Tomoko Hayashida, Mitsuo Yamanaka, Takafumi Hirakawa
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Patent number: 6608235Abstract: In reduction of an epoxy group-containing organic compound, for example, a C5-C20 saturated or unsaturated epoxy cycloaliphatic compound, in the presence of a nickel catalyst, by bringing the compound into contact with hydrogen, the target compound can be produced at a high yield by adding a basic substance (for example, an alkali metal hydroxide, an alkali metal carbonate, an alkali metal alkoxide, and an amine compound having 1 to 3 C1-C12 alkyl groups), to the reduction reaction system, to thereby restrict production of by-products due to a side deoxidation reaction.Type: GrantFiled: August 6, 2001Date of Patent: August 19, 2003Assignee: Ube Industries, Ltd.Inventors: Nobuyuki Kuroda, Tokuo Matsuzaki, Mitsuo Yamanaka, Takato Nakamura, Osamu Yamazaki, Hirofumi Takemoto
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Patent number: 6420575Abstract: After 1,5,9-cyclododecatriene is epoxidized with hydrogen peroxide in the presence of a catalyst containing a tungsten compound, a quaternary onium salt and a mineral acid, to obtain a liquid reaction mixture containing the resultant 1,2-epoxy-5,9-cyclododecadiene, the catalyst, non-reacted hydrogen peroxide and non-reacted 1,5,9-cyclododecatriene and being phase-separated into an oil phase fraction and an aqueous phase fraction, at least the oil phase fraction of the liquid reaction mixture is treated with an aqueous alkali solution to deactivate and remove the non-reacted hydrogen peroxide and the catalyst contained in at least the oil phase fraction.Type: GrantFiled: July 2, 2001Date of Patent: July 16, 2002Assignee: Ube Industries Ltd.Inventors: Kouhei Ninomiya, Tsunemi Sugimoto, Junichi Kugimoto, Mitsuo Yamanaka, Kohji Kaiso
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Publication number: 20020045791Abstract: After 1,5,9-cyclododecatriene is epoxidized with hydrogen peroxide in the presence of a catalyst containing a tungsten compound, a quaternary onium salt and a mineral acid, to obtain a liquid reaction mixture containing the resultant 1,2-epoxy-5,9-cyclododecadiene, the catalyst, non-reacted hydrogen peroxide and non-reacted 1,5,9-cyclododecatriene and being phase-separated into an oil phase fraction and an aqueous phase fraction, at least the oil phase fraction of the liquid reaction mixture is treated with an aqueous alkali solution to deactivate and remove the non-reacted hydrogen peroxide and the catalyst contained in at least the oil phase fraction.Type: ApplicationFiled: July 2, 2001Publication date: April 18, 2002Applicant: Ube Industries, Ltd.Inventors: Kouhei Ninomiya, Tsunemi Sugimoto, Junichi Kugimoto, Mitsuo Yamanaka, Kohji Kaiso
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Patent number: 6172243Abstract: Described is a process for producing 1,2-epoxy-5,9-cyclododecadiene, which comprises bringing 1,5,9-cyclododecatriene into contact with hydrogen peroxide in the presence of a carboxylic acid having an acid dissociation constant K at 25° C. of 5.0×10−6≦K≦1.0×10−4. The present invention makes it possible to provide an industrially desirable process which permits the production of 1,2-epoxy-5,9-cyclododecadiene with good selectivity and facilitates control of reaction including shortening of the reaction time.Type: GrantFiled: March 10, 2000Date of Patent: January 9, 2001Assignee: Ube Industries, Ltd.Inventors: Nobuyuki Kuroda, Mitsuo Yamanaka, Hirofumi Takemoto, Kohei Ninomiya, Junichi Kugimoto
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Patent number: 6043383Abstract: 1,2-epoxy-5,9-cyclododecadiene is produced with a high selectivity thereto by epoxidizing 1,5,9-cyclododecatriene in a continuous multi-stage oxidation apparatus having a plurality of reactors connected to each other in series in such a manner that (1) in a first reactor, 1,5,9-cyclododecatriene, hydrogen peroxide, catalyst components and optionally a mineral acid are subjected to an epoxidation reaction; (2) the resultant reaction mixture delivered from the first reactor is passed through one or more succeeding reactors to further epoxidize the non-reacted 1,5,9-cyclododecatriene with the non-reacted hydrogen peroxide; and (3) the final reaction mixture produced in a rearend reactor is delivered from the oxidation apparatus, and optionally subjected to an isolation-refining procedure wherein the target 1,2-epoxy-5,9-cyclododecadiene is refined and collected and the non-reacted 1,5,9-cyclododecatriene is recovered and recycled to the epoxidation procedure.Type: GrantFiled: April 12, 1999Date of Patent: March 28, 2000Assignee: Ube Industries, Ltd.Inventors: Nobuyuki Kuroda, Mitsuo Yamanaka, Osamu Yamazaki, Hirofumi Takemoto, Kohei Ninomiya, Junichi Kugimoto, Koji Kaiso, Hideo Shimomura
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Patent number: 5728890Abstract: A cycloalkylhydroperoxide, preferably having a C.sub.5-20 cycloalkyl group, is decomposed by bringing it into contact with a ruthenium complex of the formula:?RuCl.sub.2 L.sub.n !.sub.m (I)wherein L=a neutral ligand, n=1-4 and m.gtoreq.1, for example, ?RuCl.sub.2 (PPh.sub.3).sub.3 !, to produce a cycloalkanol and cycloalkanone.Type: GrantFiled: January 30, 1996Date of Patent: March 17, 1998Assignee: Ube Industries, Ltd.Inventors: Toshikazu Hamamoto, Mitsuo Yamanaka, Takato Nakamura, Tetsuro Shimano
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Patent number: 4992332Abstract: The improvement in a porous hollow fiber having a large number of micropores in its surrounding wall, in which walls of said pores are coated with an essentially water-insoluble alkylcellulose derivative such as ethylcellulose, carboxymethylethylcellulose, hydroxypropylmethylcellulose acetate succinate or hydroxypropylmethylcellulose phthalate, or poly(2-hydroxyethyl methacrylate).Type: GrantFiled: April 27, 1989Date of Patent: February 12, 1991Assignee: UBE Industries, Ltd.Inventors: Eiichi Kamei, Yasushi Shimomura, Mitsuo Yamanaka
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Patent number: 4663372Abstract: A flame-retarded polyamide composition comprising a polyamide and a triazine addition compound consisting essentially of one mole of a triazine derivative having the formula (I): ##STR1## in which R is divalent hydrocarbon residue containing 1-12 carbon atoms, and one or two moles of one or two compounds selected from the group consisting of cyanuric acid and isocyanuric acid.Type: GrantFiled: November 1, 1985Date of Patent: May 5, 1987Assignee: UBE Industries Ltd.Inventors: Hidemasa Okamoto, Mitsuo Yamanaka, Kazuyoshi Fujii
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Patent number: 4654265Abstract: In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon, such as ethylene oxide-grafted nylon 6.Type: GrantFiled: June 4, 1986Date of Patent: March 31, 1987Assignee: Ube Industries, Ltd.Inventors: Eiichi Kamei, Yasushi Shimomura, Mitsuo Yamanaka
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Patent number: 4574154Abstract: A triazine addition compound consisting essentially of one mole of a triazine derivative having the formula (I): ##STR1## in which R is a divalent hydrocarbon residue containing 1-12 carbon atoms, and one or two moles of at least one compound selected from the group consisting of cyanuric acid and isocyanuric acid.Processes of the preparation of the addition compound and a flame-retarded polyamide composition are also disclosed.Type: GrantFiled: December 28, 1983Date of Patent: March 4, 1986Assignee: Ube Industries, Ltd.Inventors: Hidemasa Okamoto, Mitsuo Yamanaka, Kazuyoshi Fujii
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Patent number: 4452931Abstract: A flame-retardant polyamide resin composition having an excellent flame-retarding property clearing over the level V-0 of the UL-94 Standard contains a flame retarder consisting essentially of:(1) a first flame-retarder component consisting essentially of at least one melamine derivative of the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 represent, independently from each other, a divalent hydrocarbon radical having 1 to 15 carbon atoms and n represents zero or an integer of 1 to 5, and(2) a second flame-retarder component consisting essentially of at least one member selected from unsubstituted and substituted melamine cyanurate compounds and unsubstituted and substituted organic carboxylic acids and anhydrides having a boiling point and/or a decomposition point higher than the melting point of the polyamide resin matrix.Type: GrantFiled: March 24, 1983Date of Patent: June 5, 1984Assignee: UBE Industries, Ltd.Inventors: Hidemasa Okamoto, Mitsuo Yamanaka, Mokoto Takahashi