Patents by Inventor Toshihide Senzaki
Toshihide Senzaki 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: 9051422Abstract: A water-soluble thermally polymerizable oxetane resin composition comprises (A) a water-soluble oxetane compound and (B) at least one heteropolyacid compound selected from heteropolyacids and heteropolyacid salts. The water-soluble oxetane compound may contain one or more oxetane functional groups in the molecule and one or more alcoholic OH groups in the molecule. The heteropolyacids include phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, silicomolybdic acid or mixtures thereof. The heteropolyacid salts include phosphotungstic acid salts, phosphomolybdic acid salts, silicotungstic acid salts, silicomolybdic acid salts or mixtures thereof.Type: GrantFiled: September 13, 2007Date of Patent: June 9, 2015Assignee: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.Inventors: Atsuhiko Katayama, Keiji Banno, Niranjan Kumar Shrestha, Toshihide Senzaki
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Patent number: 8344097Abstract: Disclosed is a cationically polymerizable composition which shows improved storage stability and whose polymerization initiation temperature or curing temperature is controlled. In the case where the composition is thermosetting, it yields a cured product of three-dimensional structure excellent in mechanical properties, electrical properties, adhesive properties, heat resistance, moisture resistance, chemical resistance, and the like. The cationically polymerizable composition comprises a cationically polymerizable compound selected from vinyl compounds, lactones, cyclic ethers, and the like, a heteropolyacid selected from phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, silicomolybdic acid, and the like as a cationic polymerization initiator, and a stabilizer selected from heteropolyacid salts as an inhibitor of cationic polymerization.Type: GrantFiled: June 12, 2007Date of Patent: January 1, 2013Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Atsuhiko Katayama, Niranjan Kumar Shrestha, Keiji Banno, Toshihide Senzaki
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Publication number: 20100273941Abstract: Disclosed is a water-soluble, thermally polymerizable oxetane composition essentially comprising a water-soluble oxetane compound and a heteropolyacid. The water-soluble thermally polymerizable oxetane resin composition essentially comprises (A) a water-soluble oxetane compound and (B) at least one heteropolyacid compound selected from heteropolyacids and heteropolyacid salts. The water-soluble oxetane compound may contain one or more oxetane functional groups in the molecule and one or more alcoholic OH groups in the molecule. The heteropolyacids include phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, and silicomolybdic acid and mixtures thereof. The heteropolyacid salts include phosphotungstic acid salts, phosphomolybdic acid salts, silicotungstic acid salts, and silicomolybdic acid salts and mixtures thereof.Type: ApplicationFiled: September 13, 2007Publication date: October 28, 2010Applicant: NIPPON STEEL CHEMICAL CO., LTD.Inventors: Atsuhiko Katayama, Keiji Banno, Niranja Kumar Shrestha, Toshihide Senzaki
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Publication number: 20100081785Abstract: Disclosed is a cationically polymerizable composition which shows improved storage stability and whose polymerization initiation temperature or curing temperature is controlled. In the case where the composition is thermosetting, it yields a cured product of three-dimensional structure excellent in mechanical properties, electrical properties, adhesive properties, heat resistance, moisture resistance, chemical resistance, and the like. The cationically polymerizable composition comprises a cationically polymerizable compound selected from vinyl compounds, lactones, cyclic ethers, and the like, a heteropolyacid selected from phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, silicomolybdic acid, and the like as a cationic polymerization initiator, and a stabilizer selected from heteropolyacid salts as an inhibitor of cationic polymerization.Type: ApplicationFiled: June 12, 2007Publication date: April 1, 2010Inventors: Atsuhiko Katayama, Niranjan Kumar Shrestha, Keiji Banno, Toshihide Senzaki
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Patent number: 7098268Abstract: This invention relates to a resin composition useful as a vibration-damping agent and the like. The resin composition is formulated by adding 1 wt % or more of styrenated phenol obtained by the reaction of a phenol with styrene to a polycyclic aromatic oligomer obtained by condensing a polycyclic aromatic compound containing 2 to 3 rings and formaldehyde. The polycyclic aromatic oligomer is obtained by the reaction of a polycyclic aromatic compound with formaldehyde and, if necessary, further with a phenol in the presence of an acid catalyst and has a number average molecular weight of 300–1000. The styrenated phenol is obtained by the reaction of 1 mole of a phenol with 1–2.5 moles of styrene in the presence of an acid catalyst.Type: GrantFiled: August 1, 2002Date of Patent: August 29, 2006Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Toshihide Senzaki, Takahiro Imamura
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Patent number: 7049389Abstract: This invention relates to a process for preparing high-purity aromatic oligomers by effectively separating an organic layer containing aromatic oligomers or the reaction products of a polycyclic aromatic compound with formaldehyde from an aqueous layer containing an acid catalyst in a simplified manner, hitherto regarded difficult to accomplish, and obtaining high-purity aromatic oligomers from the organic layer containing a reduced amount of impurities. In separating the aqueous layer containing the acid catalyst and the organic layer containing the oligomers from the reaction mixture formed by the condensation of a polycyclic aromatic compound and formaldehyde, the emulsion phase is broken by adding a nonionic or cationic surfactant in an effective amount and an alkali in an amount sufficient to neutralize 1–70% of the acid in the acid catalyst, the organic and aqueous layers are separated and the aromatic oligomers are recovered from the organic layer.Type: GrantFiled: December 26, 2002Date of Patent: May 23, 2006Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Toshihide Senzaki, Takahiro Imamura, Kazuyoshi Horibe, Tomoaki Yoshida, Atsuhiko Katayama, Yasuo Wada, Katsuhide Noguchi
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Patent number: 6921842Abstract: The hydrogenated aromatic oligomer of this invention is represented by the following formula (1) (A-F)n-A??(1) (wherein A is a segment comprising mainly a polycyclic aromatic compound, a phenol and at least partly hydrogenated products of these two, F is methylene or dimethylene ether and n is a number in the range of 1-100) and obtained by the reaction of a polycyclic aromatic compound such as naphthalene with formaldehyde or a derivative thereof and a phenol in the presence of an acid catalyst followed by hydrogenation of the product aromatic oligomer. This oligomer is odorless, highly transparent and useful as an improver of the adhesiveness and vibration damping properties when incorporated in resins and rubbers and performs excellently as a vibration damping agent in a wide temperature range.Type: GrantFiled: July 11, 2001Date of Patent: July 26, 2005Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Toshihide Senzaki, Takahiro Imamura, Takehiro Shimizu, Munehito Nagai
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Publication number: 20040266976Abstract: This invention relates to a process for preparing high-purity aromatic oligomers by effectively separating an organic layer containing aromatic oligomers or the reaction products of a polycyclic aromatic compound with formaldehyde from an aqueous layer containing an acid catalyst in a simplified manner, hitherto regarded difficult to accomplish, and obtaining high-purity aromatic oligomers from the organic layer containing a reduced amount of impurities. In separating the aqueous layer containing the acid catalyst and the organic layer containing the oligomers from the reaction mixture formed by the condensation of a polycyclic aromatic compound and formaldehyde, the emulsion phase is broken by adding a nonionic or cationic surfactant in an effective amount and an alkali in an amount sufficient to neutralize 1-70% of the acid in the acid catalyst, the organic and aqueous layers are separated and the aromatic oligomers are recovered from the organic layer.Type: ApplicationFiled: May 20, 2004Publication date: December 30, 2004Inventors: Toshihide Senzaki, Takahiro Imamura, Kazuyoshi Horibe, Tomoaki Yoshida, Atsuhiko Katayama, Yasuo Wada, Katsuhide Noguchi
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Publication number: 20040214967Abstract: This invention relates to a resin composition useful as a vibration-damping agent and the like. The resin composition is formulated by adding 1 wt % or more of styrenated phenol obtained by the reaction of a phenol with styrene to a polycyclic aromatic oligomer obtained by condensing a polycyclic aromatic compound containing 2 to 3 rings and formaldehyde. The polycyclic aromatic oligomer is obtained by the reaction of a polycyclic aromatic compound with formaldehyde and, if necessary, further with a phenol in the presence of an acid catalyst and has a number average molecular weight of 300-1000. The styrenated phenol is obtained by the reaction of 1 mole of a phenol with 1-2.5 moles of styrene in the presence of an acid catalyst.Type: ApplicationFiled: February 2, 2004Publication date: October 28, 2004Inventors: Toshihide Senzaki, Takahiro Imamura
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Patent number: 6713591Abstract: This invention relates to an aromatic oligomer represented by the following formula (1): (A—F)n—A (1) wherein A is a unit comprising (a) 30-90 wt % of a bicyclic or tricyclic aromatic compound and (b) 10-70 wt % of a phenol, F is methylene or a mixture of methylene and —CH2OCH2— and n is a number of 1-100. The aromatic oligomer is obtained by and reaction of a polycyclic aromatic compound such as naphthalene and benzothiophene, a phenol and formaldehyde compound in the presence of an acid catalyst. The aromatic oligomer is odorless and useful for various applications. In particular, when incorporated in rubber or resin, the aromatic oligomer can perform execellently as a tackifier in a wide temperature range or perform excellently as a vibration damping agent.Type: GrantFiled: March 5, 2002Date of Patent: March 30, 2004Assignee: Nippon Steel Chemicals Co., Ltd.Inventors: Toshihide Senzaki, Takahiro Imamura
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Publication number: 20040014930Abstract: The hydrogenated aromatic oligomer of this invention is represented by the following formula (1)Type: ApplicationFiled: January 10, 2003Publication date: January 22, 2004Inventors: Toshihide Senzaki, Takahiro Imamura, Takehiro Shimizu, Munehito Nagai
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Patent number: 6664433Abstract: This invention provides a process for purifying to a high degree of purity aromatic hydrocarbons containing impurities which are difficult to separate by distillation such as sulfur compounds and nitrogen compounds. The process of this invention for purifying aromatic hydrocarbons comprises treating crude aromatic hydrocarbons with a formaldehyde or with a formaldehyde and a phenol in the presence of an acid catalyst to form oligomers, distilling or evaporating the reaction mixture thereby separating the unreacted aromatic hydrocarbons from the oligomers, and crystallizing or washing with an organic solvent the separated aromatic hydrocarbons. In case the target hydrocarbon is naphthalene, it is possible to prepare naphthalene which has a purity of 99.9999 wt % or more, emits little odor, and can be readily flavored by perfumes. Naphthalene of this quality is used to prepare an insecticide of excellent fragrance.Type: GrantFiled: October 15, 2001Date of Patent: December 16, 2003Assignee: Nippon Steel Chemical Co., Ltd.Inventors: Toshihide Senzaki, Takahiro Imamura, Takeshi Takayama, Katsuhide Noguchi