Patents by Inventor Shiro Katagiri
Shiro Katagiri 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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Publication number: 20120263882Abstract: A resin-impregnated base substrate is provided by immersing a sheet in an aromatic liquid crystal polyester solution composition so that the polyester is impregnated into the sheet, and removing the solvent. The composition comprises 20 to 50 parts by weight of an aromatic liquid crystal polyester and 100 parts by weight of an aprotic solvent having no halogen atom, wherein the sheet comprises fiber selected from the group consisting of polyolefin resin fiber, fluorocarbon resin fiber, aramid resin fiber, glass fiber, ceramic fiber and carbon fiber.Type: ApplicationFiled: June 25, 2012Publication date: October 18, 2012Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Satoshi Okamoto, Shiro Katagiri, Jongchul Seo
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Patent number: 7344657Abstract: An aromatic liquid-crystalline polyester composition is provided, which comprises at least one compound selected from an aliphatic carboxylate aryl ester and an aromatic carboxylic anhydride; an aromatic liquid-crystalline polyester; and a solvent containing at least 30% by weight of a halogen-substituted phenol compound. Using the composition, an aromatic liquid-crystalline polyester film with a low viscosity in melting state can be obtained.Type: GrantFiled: September 23, 2005Date of Patent: March 18, 2008Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Shiro Katagiri
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Publication number: 20080048150Abstract: A method for producing a molded article is provided, the method comprising the step of press-molding a resin composition comprising a filler and a powder of a liquid crystal polymer having a flow starting temperature of 280° C. or higher and an average particle size of 0.5 to 50 ?m. In the molded article obtained by the method of the present invention, the functions provided by the filler, such as thermal conductivity and dielectric property, can be effectively and uniformly expressed.Type: ApplicationFiled: August 20, 2007Publication date: February 28, 2008Inventors: Tomoya Hosoda, Satoshi Okamoto, Shiro Katagiri
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Publication number: 20070182059Abstract: A resin molded article having a reduced dielectric loss tangent is provided. This resin molded article is obtained by performing a heat treatment to a resin composition comprising a liquid-crystalline polyester and an epoxy-group containing ethylene copolymer at a temperature lower than a flow-beginning temperature of the liquid-crystalline polyester, preferably at a temperature between a lower limit temperature calculated by subtracting 120° C. from the flow-beginning temperature and an upper limit temperature calculated by subtracting 20° C. from the flow-beginning temperature. This resin molded article has a smaller dielectric loss tangent than the resin molded article obtained from the resin composition without the heat treatment.Type: ApplicationFiled: March 3, 2005Publication date: August 9, 2007Applicants: MATSUSHITA ELECTRIC WORKS, LTD., SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Naoto Ikegawa, Satoshi Okamoto, Shiro Katagiri
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Patent number: 7223807Abstract: An object of the present invention is to provide a resin composition which is capable of manufacturing a high dielectric resin film having high dielectric constant and small dielectric loss tangent. And the present invention provides high dielectric resin composition comprising: a high dielectric filler; and resin; wherein a relative dielectric constant of the high dielectric filler satisfies the following formulae (1) and (2). [(?T??25)/?25]MAX?0.Type: GrantFiled: January 26, 2004Date of Patent: May 29, 2007Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Shiro Katagiri
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Patent number: 7211527Abstract: A resin-impregnated substrate is obtained by a method comprising the steps of immersing a sheet comprising an aromatic liquid crystalline polyester fiber in an aromatic liquid crystalline polyester solution containing 100 parts by weight of a solvent and 0.5 to 100 parts by weight of an aromatic liquid crystalline polyester and removing the solvent, the solvent containing on a weight basis with respect to the solvent 30% or more of a phenol compound. The resin-impregnated substrate has a high heat resistance in soldering conditions.Type: GrantFiled: January 5, 2005Date of Patent: May 1, 2007Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Shiro Katagiri, Wakana Aizawa, Masatoshi Kito
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Patent number: 7211528Abstract: A resin-impregnated substrate having a high heat resistance at a high temperature under soldering conditions and a small linear expansion rate is provided. The resin-impregnated substrate can be obtained by a method comprising the steps of immersing a sheet comprising an aromatic liquid-crystalline polyester fiber in an aromatic liquid-crystalline polyester solution containing an aprotonic solvent and a liquid-crystalline polyester comprising 10 to 35% by mol, with respect to the total repeating units of the polyester, of at least one repeating unit selected from the group consisting of a repeating unit derived from an aromatic diamine and a repeating unit derived from an aromatic amine with a phenolic hydroxyl group; and removing the solvent.Type: GrantFiled: June 13, 2005Date of Patent: May 1, 2007Assignee: Sumitomo Chemical Company, LimitedInventors: Shiro Katagiri, Satoshi Okamoto
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Publication number: 20070092709Abstract: A resin-impregnated base substrate is provided by immersing a sheet in an aromatic liquid crystal polyester solution composition so that the polyester is impregnated into the sheet, and removing the solvent. The composition comprises 20 to 50 parts by weight of an aromatic liquid crystal polyester and 100 parts by weight of an aprotic solvent having no halogen atom, wherein the sheet comprises fiber selected from the group consisting of polyolefin resin fiber, fluorocarbon resin fiber, aramid resin fiber, glass fiber, ceramic fiber and carbon fiber.Type: ApplicationFiled: October 23, 2006Publication date: April 26, 2007Inventors: Satoshi Okamoto, Shiro Katagiri, Jongchul Seo
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Patent number: 7022413Abstract: The present invention provides an aromatic liquid crystalline polyester film excellent in the adhesion property to a substrate. Such film is obtained by an aromatic liquid crystalline polyester film obtained by casting an aromatic liquid crystalline polyester solution composition containing a solvent containing a halogen-substituted phenol defined by the following general formula (I): (wherein A is a halogen atom or a trihalomethyl group; i is an integer of 1 to 5; and in the case i is 2 or higher, the respective A may be the same or different), an aromatic liquid crystalline polyester, and a non-liquid crystalline resin at ratio of 1 to 200 parts by weight of the non-liquid crystalline resin to 100 parts by weight of the aromatic liquid crystalline polyester on a substrate; and removing the solvent.Type: GrantFiled: August 25, 2004Date of Patent: April 4, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Shiro Katagiri, Satoshi Okamoto
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Patent number: 7022807Abstract: A liquid-crystalline polyester solution composition comprises an aprotic solvent and liquid-crystalline polyester. The liquid-crystalline polyester includes at least one of repeating unit selected from the group consisting of a repeating unit derived from aromatic diamine, a repeating unit derived from aromatic amine having a hydroxyl group and a repeating unit derived from aromatic amino acid, in from 10 to 35 mol % in the liquid-crystalline polyester.Type: GrantFiled: April 15, 2004Date of Patent: April 4, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Shinji Ohtomo, Shiro Katagiri
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Publication number: 20060069190Abstract: An aromatic liquid-crystalline polyester composition is provided, which comprises at least one compound selected from an aliphatic carboxylate aryl ester and an aromatic carboxylic anhydride; an aromatic liquid-crystalline polyester; and a solvent containing at least 30% by weight of a halogen-substituted phenol compound. Using the composition, an aromatic liquid-crystalline polyester film with a low viscosity in melting state can be obtained.Type: ApplicationFiled: September 23, 2005Publication date: March 30, 2006Inventors: Satoshi Okamoto, Shiro Katagiri
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Publication number: 20050276975Abstract: A resin-impregnated substrate having a high heat resistance at a high temperature under soldering conditions and a small linear expansion rate is provided. The resin-impregnated substrate can be obtained by a method comprising the steps of immersing a sheet comprising an aromatic liquid-crystalline polyester fiber in an aromatic liquid-crystalline polyester solution containing an aprotonic solvent and a liquid-crystalline polyester comprising 10 to 35% by mol, with respect to the total repeating units of the polyester, of at least one repeating unit selected from the group consisting of a repeating unit derived from an aromatic diamine and a repeating unit derived from an aromatic amine with a phenolic hydroxyl group; and removing the solvent.Type: ApplicationFiled: June 13, 2005Publication date: December 15, 2005Inventors: Shiro Katagiri, Satoshi Okamoto
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Publication number: 20050181692Abstract: A resin-impregnated substrate is obtained by a method comprising the steps of immersing a sheet comprising an aromatic liquid crystalline polyester fiber in an aromatic liquid crystalline polyester solution containing 100 parts by weight of a solvent and 0.5 to 100 parts by weight of an aromatic liquid crystalline polyester and removing the solvent, the solvent containing on a weight basis with respect to the solvent 30% or more of a phenol compound. The resin-impregnated substrate has a high heat resistance in soldering conditions.Type: ApplicationFiled: January 5, 2005Publication date: August 18, 2005Inventors: Satoshi Okamoto, Shiro Katagiri, Wakana Aizawa, Masatoshi Kito
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Publication number: 20050085618Abstract: The present invention provides an aromatic liquid crystalline polyester film excellent in the adhesion property to a substrate. Such film is obtained by an aromatic liquid crystalline polyester film obtained by casting an aromatic liquid crystalline polyester solution composition containing a solvent containing a halogen-substituted phenol defined by the following general formula (I): (wherein A is a halogen atom or a trihalomethyl group; i is an integer of 1 to 5; and in the case i is 2 or higher, the respective A may be the same or different), an aromatic liquid crystalline polyester, and a non-liquid crystalline resin at ratio of 1 to 200 parts by weight of the non-liquid crystalline resin to 100 parts by weight of the aromatic liquid crystalline polyester on a substrate; and removing the solvent.Type: ApplicationFiled: August 25, 2004Publication date: April 21, 2005Inventors: Shiro Katagiri, Satoshi Okamoto
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Publication number: 20040210032Abstract: A liquid-crystalline polyester solution composition comprises an aprotic solvent and liquid-crystalline polyester. The liquid-crystalline polyester includes at least one of repeating unit selected from the group consisting of a repeating unit derived from aromatic diamine, a repeating unit derived from aromatic amine having a hydroxyl group and a repeating unit derived from aromatic amino acid, in from 10 to 35 mol % in the liquid-crystalline polyester.Type: ApplicationFiled: April 15, 2004Publication date: October 21, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Satoshi Okamoto, Shinji Ohtomo, Shiro Katagiri
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Publication number: 20040192858Abstract: The present invention is to provide a solution composition of aromatic liquid-crystalline polyester from which a film excellent in an electric property and mechanical strength is produced. The present invention provides a solution composition comprising a solvent, aromatic liquid crystalline polyester, an inorganic filler, and coupling agent having a boiling point of not less than 250° C., wherein a pH of water solution of the coupling agent is from 4 to 8.Type: ApplicationFiled: March 15, 2004Publication date: September 30, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Shiro Katagiri, Satoshi Okamoto
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Publication number: 20040164282Abstract: An object of the present invention is to provide a resin composition which is capable of manufacturing a high dielectric resin film having high dielectric constant and small dielectric loss tangent.Type: ApplicationFiled: January 26, 2004Publication date: August 26, 2004Applicant: SUMITOMO CHEMICAL COMPANY LIMITEDInventors: Satoshi Okamoto, Shiro Katagiri
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Patent number: 6548577Abstract: The present invention relates to a wood-filled thermoplastic resin composition comprising wood meal, thermoplastic resin particles and a binder solution, and a process for producing the same.Type: GrantFiled: July 17, 2001Date of Patent: April 15, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Takeo Kitayama, Shiro Katagiri, Shigeyoshi Matsubara
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Publication number: 20020016388Abstract: The present invention relates to a wood-filled thermoplastic resin composition comprising wood meal, thermoplastic resin particles and a binder solution, and a process for producing the same.Type: ApplicationFiled: July 17, 2001Publication date: February 7, 2002Applicant: Sumitomo Chemical Company, LimitedInventors: Takeo Kitayama, Shiro Katagiri, Shigeyoshi Matsubara