Patents by Inventor Katsuhiko Tsunashima
Katsuhiko Tsunashima 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: 8357822Abstract: There is provided a process capable of preventing the adhesion of a catalyst to an evaporator in a step of separating a chlorophosphite as a target substance from a reaction liquid by evaporation. The process includes a first step of allowing phosphorus trichloride and a phosphorous acid triester represented by (RO)3P to react in the presence of a catalyst having a viscosity at 80° C. of 100 mPa·s or lower to produce a chlorophosphite represented by RO(R?)PCl, and a second step of vaporizing a reaction liquid containing the chlorophosphite obtained in the first step, in a short time, to separate the catalyst.Type: GrantFiled: December 5, 2008Date of Patent: January 22, 2013Assignee: Nippon Chemical Industrial Co., Ltd.Inventors: Kentaro Sasaki, Katsuhiko Tsunashima, Tadashi Saito, Yoshifusa Hara
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Patent number: 8247112Abstract: An object of the present invention is to provide an electrolyte solution for lithium-ion secondary batteries comprising a tetraalkylphosphonium salt which improves the cycle characteristics and safety of lithium-ion batteries, and to provide a lithium-ion secondary battery using the electrolyte solution. Disclosed is an electrolyte comprising a tetraalkylphosphonium salt represented by general formula (1) wherein R1 represents a linear, branched or alicyclic alkyl group having 2 to 6 carbon atoms and R2 represents a linear, branched or alicyclic alkyl group having 1 to 14 carbon atoms, provided that R1 and R2 are different from each other and the total number of carbon atoms in the phosphonium cation is 20 or less; and X represents an anion.Type: GrantFiled: September 11, 2007Date of Patent: August 21, 2012Assignee: Nippon Chemical Industrial Co., Ltd.Inventors: Katsuhiko Tsunashima, Masahiro Kikuchi
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Patent number: 8114212Abstract: Powdery silica composite particles obtained by a surface treatment step of adding acid or alkali to a reactant solution comprising: core silica particles of 5 to 200 nm in average particle size; alkoxysilane; a phosphonium salt ionic liquid represented by general formula (1); wherein R1, R2, and R3 respectively represent a linear or branched alkyl group having 1 to 5 carbon atoms, R4 represents a linear or branched alkyl group having 1 to 5 carbon atoms, n represents an integer of 1 to 8, and X represents an anionic group; and a reaction solvent such that the alkoxysilane is hydrolyzed, thereby surface-treating the core silica particles.Type: GrantFiled: February 6, 2009Date of Patent: February 14, 2012Assignees: Nippon Chemical Industrial Co., Ltd., National University Corporation Hirosaki UniversityInventors: Hideo Sawada, Katsuhiko Tsunashima, Masashi Sugiya
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Patent number: 8088995Abstract: An ionic liquid which is high in ionic conductivity and high in safety without an anxiety of ignition or the like and an electrolyte composition containing the same are provided. The present invention concerns an electrolyte composition for photoelectric conversion device, containing a quaternary phosphonium salt ionic liquid represented by the following formula (1). A viscosity at 25° C. of this ionic liquid is preferably not more than 200 mPa·sec. In the formula (1), it is preferable that the alkoxyalkyl group is a methoxymethyl group, and all of the alkyl groups are an ethyl group. In the formula, R1 represents a linear alkyl group or a branched alkyl group each having from 1 to 6 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer of from 1 to 6; and X represents N(SO2CF3)2 or N(CN)2.Type: GrantFiled: August 22, 2008Date of Patent: January 3, 2012Assignees: Tokai University Educational System, Nippon Chemical Industrial Co., Ltd.Inventors: Yoshihito Kunugi, Katsuhiko Tsunashima
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Publication number: 20110083744Abstract: An ionic liquid which is high in ionic conductivity and high in safety without an anxiety of ignition or the like and an electrolyte composition containing the same are provided. The present invention concerns an electrolyte composition for photoelectric conversion device, containing a quaternary phosphonium salt ionic liquid represented by the following formula (1). A viscosity at 25° C. of this ionic liquid is preferably not more than 200 mPa·sec. In the formula (1), it is preferable that the alkoxyalkyl group is a methoxymethyl group, and all of the alkyl groups are an ethyl group. In the formula, R1 represents a linear alkyl group or a branched alkyl group each having from 1 to 6 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer of from 1 to 6; and X represents N(SO2CF3)2 or N(CN)2.Type: ApplicationFiled: August 22, 2008Publication date: April 14, 2011Applicants: TOKAI UNIVERSITY EDUCATIONAL SYSTEM, NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Yoshihito KUNUGI, Katsuhiko TSUNASHIMA
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Publication number: 20100324337Abstract: There is provided a process capable of preventing the adhesion of a catalyst to an evaporator in a step of separating a chlorophosphite as a target substance from a reaction liquid by evaporation. The process includes a first step of allowing phosphorus trichloride and a phosphorous acid triester represented by (RO)3P to react in the presence of a catalyst having a viscosity at 80° C. of 100 mPa·s or lower to produce a chlorophosphite represented by RO(R?)PCl, and a second step of vaporizing a reaction liquid containing the chlorophosphite obtained in the first step, in a short time, to separate the catalyst.Type: ApplicationFiled: December 5, 2008Publication date: December 23, 2010Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Kentaro Sasaki, Katsuhiko Tsunashima, Tadashi Saito, Yoshifusa Hara
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Publication number: 20100267980Abstract: An object of the present invention is to provide a deep-ultraviolet-transmitting epoxy resin cured product having high heat resistance and high resistance to deep-ultraviolet light, and to provide a curing accelerator and an epoxy resin composition which are used for producing the epoxy resin cured product. The curing accelerator for deep-ultraviolet-transmitting epoxy resins comprises a tetraalkylphosphonium dialkyl phosphate represented by the following general formula (1): wherein R1, R2, R3, R4, R5, and R6 each represent an alkyl group or an alkyl group having a hydroxyl group, which has 1 to 8 carbon atoms and is linear, branched, or alicyclic; and R1, R2, R3, R4, R5, and R6 may be the same or different. Also disclosed are an epoxy resin composition comprising the curing accelerator and an epoxy resin cured product obtained by curing the resin composition.Type: ApplicationFiled: May 18, 2010Publication date: October 21, 2010Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Katsuhiko TSUNASHIMA, Masashi SUGIYA
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Publication number: 20100003597Abstract: An object of the present invention is to provide an electrolyte solution for lithium-ion secondary batteries comprising a tetraalkylphosphonium salt which improves the cycle characteristics and safety of lithium-ion batteries, and to provide a lithium-ion secondary battery using the electrolyte solution. Disclosed is an electrolyte comprising a tetraalkylphosphonium salt represented by general formula (1) wherein R1 represents a linear, branched or alicyclic alkyl group having 2 to 6 carbon atoms and R2 represents a linear, branched or alicyclic alkyl group having 1 to 14 carbon atoms, provided that R1 and R2 are different from each other and the total number of carbon atoms in the phosphonium cation is 20 or less; and X represents an anion.Type: ApplicationFiled: September 11, 2007Publication date: January 7, 2010Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Katsuhiko Tsunashima, Masahiro Kikuchi
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Publication number: 20090203820Abstract: It is intended to provide highly dispersible, powdery silica composite particles comprising a phosphonium salt ionic liquid immobilized in the surface and comprising the ionic liquid at a high content. It is also intended to provide an industrially advantageous process for producing the powdery silica composite particles at high yields. The present invention provides powdery silica composite particles obtained by a surface treatment step of adding acid or alkali to a reactant solution comprising: core silica particles of 5 to 200 nm in average particle size; alkoxysilane; a phosphonium salt ionic liquid represented by the following general formula (1); and a reaction solvent such that the alkoxysilane is hydrolyzed, thereby surface-treating the core silica particles.Type: ApplicationFiled: February 6, 2009Publication date: August 13, 2009Applicants: NIPPON CHEMICAL INDUSTRIAL CO., LTD., NATIONAL UNIVERSITY CORPORATION HIROSAKI UNIVERSITYInventors: Hideo SAWADA, Katsuhiko TSUNASHIMA, Masashi SUGIYA
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Publication number: 20090118442Abstract: An object of the present invention is to provide a deep-ultraviolet-transmitting epoxy resin cured product having high heat resistance and high resistance to deep-ultraviolet light, and to provide a curing accelerator and an epoxy resin composition which are used for producing the epoxy resin cured product. The curing accelerator for deep-ultraviolet-transmitting epoxy resins comprises a tetraalkylphosphonium dialkyl phosphate represented by the following general formula (1): wherein R1, R2, R3, R4, R5, and R6 each represent an alkyl group or an alkyl group having a hydroxyl group, which has 1 to 8 carbon atoms and is linear, branched, or alicyclic; and R1, R2, R3, R4, R5, and R6 may be the same or different. Also disclosed are an epoxy resin composition comprising the curing accelerator and an epoxy resin cured product obtained by curing the resin composition.Type: ApplicationFiled: April 13, 2007Publication date: May 7, 2009Applicant: NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Katsuhiko Tsunashima, Masashi Sugiya
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Publication number: 20090084443Abstract: An ionic liquid which is high in ionic conductivity and high in safety without an anxiety of ignition or the like and an electrolyte composition containing the same are provided. The present invention concerns an electrolyte composition for photoelectric conversion device, containing a quaternary phosphonium salt ionic liquid represented by the following formula (1). A viscosity at 25° C. of this ionic liquid is preferably not more than 200 mPa·sec. In the formula (1), it is preferable that the alkoxyalkyl group is a methoxymethyl group, and all of the alkyl groups are an ethyl group. In the formula, R1 represents a linear alkyl group or a branched alkyl group each having from 1 to 6 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer of from 1 to 6; and X represents N(SO2CF3)2 or N(CN)2.Type: ApplicationFiled: September 16, 2008Publication date: April 2, 2009Applicants: TOKAI UNIVERSITY EDUCATIONAL SYSTEM, NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Yoshihito KUNUGI, Katsuhiko TSUNASHIMA
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Publication number: 20090065058Abstract: An ionic liquid which is high in ionic conductivity and high in safety without an anxiety of ignition or the like and an electrolyte composition containing the same are provided. The present invention concerns an electrolyte composition for photoelectric conversion device, containing a quaternary phosphonium salt ionic liquid represented by the following formula (1). A viscosity at 25° C. of this ionic liquid is preferably not more than 200 mPa·sec. In the formula (1), it is preferable that the alkoxyalkyl group is a methoxymethyl group, and all of the alkyl groups are an ethyl group. In the formula, R1 represents a linear alkyl group or a branched alkyl group each having from 1 to 6 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer of from 1 to 6; and X represents N(SO2CF3)2 or N(CN)2.Type: ApplicationFiled: November 12, 2008Publication date: March 12, 2009Applicants: TOKAI UNIVERSITY EDUCATIONAL SYSTEM, NIPPON CHEMICAL INDUSTRIAL CO., LTD.Inventors: Yoshihito KUNUGI, Katsuhiko TSUNASHIMA
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Publication number: 20090053597Abstract: The present invention provides an electrolyte composition used in a charge storage device, which comprises an ionic liquid that has high ionic conductivity and is highly safe with no risks of inflammation and the like. It is an electrolyte composition used in a charge storage device, which comprises a quaternary phosphonium salt ionic liquid represented by general formula (1) as described below. The viscosity at 25° C. of this ionic liquid is preferably 200 mPa·sec or less. In the general formula (1), it is preferable that the alkoxyalkyl group be a methoxymethyl group and that all the alkyl groups be ethyl groups. wherein R1 represents a linear or branched alkyl group containing 1 to 3 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer between 1 and 3; and X represents N(SO2CF3)2.Type: ApplicationFiled: August 20, 2008Publication date: February 26, 2009Inventors: Katsuhiko Tsunashima, Fumihiro Yonekawa
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Publication number: 20090047518Abstract: An object of the invention is to provide a substance enabling uniformly dispersing an ionic liquid or a phosphonium salt in various solvents, resin materials, and the like. A powdery silica composite particle obtained by a surface treatment step comprising providing a reaction solution by mixing a silica sol containing a core silica particle having an average particle size of 5 to 200 nm, an alkoxysilane, and an ionic liquid and hydrolyzing the alkoxysilane by addition of an acid or an alkali to the reaction solution to surface-treat the core silica particle.Type: ApplicationFiled: March 6, 2007Publication date: February 19, 2009Applicants: NIPPON CHEMICAL INDUSTRIAL CO., LTD., NATIONAL UNIVERSITY CORPORATION HIROSAKI UNIVERSIT YInventors: Hideo Sawada, Masashi Sugiya, Ryo Ebara, Katsuhiko Tsunashima
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Publication number: 20080221353Abstract: The present invention provides an ionic liquid including a quaternary phosphonium salt represented by general formula (1): wherein R1, R2, R3, and R4 each represent a linear alkyl group having 1 to 6 carbon atoms, a branched alkyl group having 3 to 6 carbon atoms, an alicyclic alkyl group having 3 to 6 carbon atoms, or an alkoxyalkyl group represented by —(CH2)nO—R5 (wherein n is an integer of 1 to 6; and R5 represents a methyl group or an ethyl group); at least one of R1, R2, R3, and R4 is an alkoxyalkyl group; R1, R2, R3, and R4 may be the same or different; R1 and R2 together may form a ring; and X represents an anion. The present invention also provides a reaction solvent including the ionic liquid.Type: ApplicationFiled: March 5, 2008Publication date: September 11, 2008Applicant: Nippon Chemical Industrial Co., Ltd.Inventor: Katsuhiko Tsunashima