Patents by Inventor Takashi Ueshima
Takashi Ueshima 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: 4533721Abstract: A novel, linear, chlorine-containing polyether-sulfone polymer excellent in flame retardancy, heat resistance, transparency, and water resistance, which is obtained by polymerizing at least one aromatic tri- or tetra-halide with at least one dialkali metal salt of a dihydric phenol, and a process for the preparation of this polymer. The polymer is represented by the following general formula: ##STR1## wherein X and Y stand for a hydrogen atom or a chlorine atom, with the proviso that at least one of X and Y is a chlorine atom, Q stands for a direct bond, --O--, --S-- or a divalent aliphatic or alicyclic hydrocarbon group in which the carbon number is an integer of from 1 to 6, m is 0 or 1, and n is an integer of from 10 to 1000.Type: GrantFiled: August 23, 1983Date of Patent: August 6, 1985Assignee: Showa Denko Kabushiki KaishaInventors: Shigeru Kurosawa, Takashi Ueshima
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Patent number: 4351922Abstract: A highly water-absorbing but less water-soluble hydrogel is produced by polymerizing at least one hydrophilic ethylenically unsaturated monomer, e.g., ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, or derivatives thereof, in the presence of a specific difunctional compound, e.g., polyethyleneglycol diglycidyl ether, polyethyleneglycol diacrylate, etc.Type: GrantFiled: August 19, 1980Date of Patent: September 28, 1982Assignee: Showa Denko Kabushiki KaishaInventors: Tooru Yoshida, Seigo Iwagami, Takashi Ueshima, Yoshikazu Hosoda
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Patent number: 4140731Abstract: A resin composition having superior mechanical properties, especially high impact strength, which comprises (A) a norbornene-type polymer obtained by ring-opening polymerization of 5-cyano-bicyclo[2,2,1]heptene-2 or a mixture thereof with a small amount of a cycloolefin-type compound in the presence of an unsaturated polymer having a carbon-carbon double bond in the molecule and (B) a vinyl chloride homopolymer or copolymer.Type: GrantFiled: August 15, 1977Date of Patent: February 20, 1979Assignee: Showa Denko Kabushiki KaishaInventors: Junichi Nakamura, Takashi Ueshima, Shigeru Kurosawa
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Patent number: 4132750Abstract: A high impact resin composition which comprises 100 parts by weight of polymers obtained by ring-opening polymerization of cyano- or ester-substituted norbornene derivatives bearing at least one nitrile group, a substituent containing the nitrile group, an ester group or a substituent containing the ester group and 2 to 25 parts by weight of rubber-like materials.Type: GrantFiled: March 22, 1977Date of Patent: January 2, 1979Assignee: Showa Denko K.K.Inventors: Takashi Ueshima, Toshiro Yokoyama, Shoichi Kobayashi
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Patent number: 4105608Abstract: High impact composition of ring-opening polymerization product formed of (A) 100 parts by weight of at least one ring-opening polymerization product selected from the group consisting of (a) ring-opening polymerization homopolymers of norbornene derivatives containing at least one nitrile group or a substituent including said nitrile group, (b) ring-opening polymerization homopolymers of norbornene derivatives containing at least one ester group or a substituent including said ester group, (c) ring-opening polymerization copolymers of combination of said norbornene derivatives, and (d) other ring-opening polymerization copolymers of any of said norbornene derivatives and 50 mol% at most of other unsaturated cyclic compounds; and (B) 0.05 to 10.0 parts by weight of specified metal salts of fatty acids.Type: GrantFiled: May 6, 1975Date of Patent: August 8, 1978Assignee: Showa Denko K.K.Inventors: Junichi Nakamura, Hiroshi Konuma, Shiro Kokuryo, Takashi Ueshima, Chutatsu Tsuge
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Patent number: 4104325Abstract: A resin composition is prepared from 5 to 95 parts by weight of a polymer prepared by ring-opening polymerization of cyano-substituted norbornene derivatives having at least one nitrile group or substituents including nitrile group and 95 to 5 parts by weight of graft copolymer obtained by grafting at least one elastomer with at least one vinyl compound selected from the group consisting of styrene, acrylonitrile and methyl methacrylate.Type: GrantFiled: January 10, 1977Date of Patent: August 1, 1978Assignee: Showa Denko K.K.Inventors: Takashi Ueshima, Yasuzi Tanaka, Toshiro Yokoyama, Shoichi Kobayashi
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Patent number: 4080491Abstract: A process of producing a ring-opening polymerization product of a norbornene derivative containing at least one polar group or aromatic group, a norbornadiene derivative containing at least one of said groups or a cycloolefin using a catalyst system prepared from an organometallic compound and the reaction product of tungsten oxide or molybdenum oxide and a phosphorus pentahalide or phosphorus oxytrihalide or these compounds and other third components. The catalyst system possesses a high polymerization activity.Type: GrantFiled: August 16, 1976Date of Patent: March 21, 1978Assignee: Showa Denko K.K.Inventors: Yukio Kobayashi, Takashi Ueshima, Shoichi Kobayashi
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Patent number: 4059561Abstract: A flame-resistant composition of (a) a ring-opening polymerization product of a norbornene derivative and (b) a halogen-containing multicyclic compound or bromine-containing aromatic compound. The composition is employed in shaped articles and structural materials which are subjected to flame and heat exposure.Type: GrantFiled: February 9, 1976Date of Patent: November 22, 1977Assignee: Showa Denko Kabushiki KaishaInventors: Fumio Arai, Masaaki Kira, Shiro Kokuryo, Takashi Ueshima
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Patent number: 4028482Abstract: Polymers or copolymers of acid anhydride type norbornene derivatives and a method of preparing the same, said polymers or copolymers being formed with a reduced viscosity of 0.1 to 20 by ring-opening polymerization of acid anhydride type norbornene derivatives having at least one carboxylic anhydride group or a mixture of said norbornene derivatives and cycloolefins.Type: GrantFiled: September 19, 1974Date of Patent: June 7, 1977Assignee: Showa Denko Kabushiki KaishaInventors: Takashi Ueshima, Yasuzi Tanaka, Shoichi Kobayashi
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Patent number: 4022954Abstract: Processes for preparing novel polymers containing carboxyl or carboxylate groups which comprises hydrolyzing starting polymers containing acid anhydride groups in the presence of acids or alkalies, the starting polymers being prepared by ring-opening polymerization of acid anhydride-type norbornene derivatives, and the characteristics and utility of these novel polymers are disclosed.Type: GrantFiled: July 1, 1975Date of Patent: May 10, 1977Assignee: Showa Denko Kabushiki KaishaInventors: Shigeru Kurosawa, Takashi Ueshima, Yasuzi Tanaka, Shoichi Kobayashi
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Patent number: 4021510Abstract: A resin composition is prepared from 5 to 95 parts by weight of a polymer prepared by ring-opening polymerization of cyano-substituted norbornene derivatives having at least one nitrile group or substituents including nitrile group and 95 to 5 parts by weight of (a) homopolymer or copolymer of vinyl chloride, (b) styrene homopolymer or vinyl copolymer containing at least 50 per cent by weight of at least one vinyl compound selected from the group consisting of styrene, acrylonitrile and methyl methacrylate, (c) said homopolymer or copolymer compounded with elastomer, or (d) graft copolymer obtained by grafting at least one of said vinyl compounds to said elastomer.Type: GrantFiled: March 19, 1974Date of Patent: May 3, 1977Assignee: Showa Denko Kabushiki KaishaInventors: Takashi Ueshima, Yasuzi Tanaka, Toshiro Yokoyama, Shoichi Kobayashi
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Patent number: 3991139Abstract: High stability composition of ring-opening polymerization product which is formed of (A) 100 parts by weight of at least one ring-opening polymerization product selected from the group consisting of (a) ring-opening polymerization homopolymers of norbornene derivatives containing at least one cyano group, (b) ring-opening polymerization homopolymers of norbornene derivatives containing at least one ester group, (c) ring-opening polymerization homopolymers of norbornene derivatives containing at least one ether group, (d) ring-opening polymerization homopolymers containing at least one N-substituted cyclic imide group, (e) ring-opening polymerization interpolymers of the above-mentioned types of norbornene derivatives, and (f) other ring-opening polymerization copolymers obtained by the ring-opening copolymerization of said various types of norbornene derivatives and 50 mol% at most of other unsaturated cyclic compounds; and (B) 0.01 to 10.0 parts by weight of specified phenolic compounds.Type: GrantFiled: April 22, 1975Date of Patent: November 9, 1976Assignee: Showa Denko Kabushiki KaishaInventors: Shiro Kokuryo, Hiroyasu Kawahara, Hiroshi Akiyama, Takashi Ueshima, Chutatsu Tsuge
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Patent number: 3959234Abstract: A method of polymerizing imide type norbornene derivatives which comprises the ring-opening polymerization of imide type norbornene derivatives containing at least one N-substituted cyclic imide group or a mixture consisting of said norbornene derivatives as the main component and cycloolefins in the presence of a catalytic system comprising organic aluminum compounds and tungsten and/or molybdenum compounds.Type: GrantFiled: November 1, 1974Date of Patent: May 25, 1976Assignee: Showa Denko Kabushiki KaishaInventors: Shigeru Kurosawa, Takashi Ueshima, Shoichi Kobayashi
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Patent number: 3956355Abstract: A method for manufacturing cyanonorbornene by reacting acrylonitrile with a fraction resulting from cracking a petroleum fraction, particularly naphtha and mainly containing a mixture of various kinds of hydrocarbon each having five carbon atoms.Type: GrantFiled: April 3, 1975Date of Patent: May 11, 1976Assignee: Showa Denko Kabushiki KaishaInventors: Takashi Ueshima, Tosiro Yokoyama, Shoichi Kobayashi