Patents by Inventor Yuji Echigo
Yuji Echigo 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: 11936076Abstract: A metal support for an electrochemical element where the metal support includes a plate face, has a plate shape as a whole, and has a warping degree of 1.5×10?2 or less determined by calculating a least square value through the least squares method using at least three points in the plate face of the metal support, calculating a first difference between the least square value and a positive-side maximum displacement value on a positive side with respect to the least square value and a second difference between the least square value and a negative-side maximum displacement value on a negative side that is opposite to the positive side with respect to the least square value, and dividing the sum of the first difference and the second difference by a maximum length of the plate face of the metal support that passes through a center of gravity.Type: GrantFiled: March 29, 2019Date of Patent: March 19, 2024Assignee: Osaka Gas Co., Ltd.Inventors: Yuji Tsuda, Mitsuaki Echigo, Tadayuki Sogi, Kazuyuki Minami, Kyohei Manabe
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Patent number: 10239970Abstract: Fine polymer particles made by a method include producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other, and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 150° C. or more and 400° C. or less, an average particle diameter of 1 ?m or more to 100 ?m or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type polymer.Type: GrantFiled: June 30, 2016Date of Patent: March 26, 2019Assignee: Toray Industries, Inc.Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
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Patent number: 10202496Abstract: A production method of polyvinylidene fluoride resin particles comprising: (Process a1) a process to precipitate the polyvinylidene fluoride resin particles by adding a 100 mass % solution in total consisting of 75 to 99 mass % organic solvent, 1 to 25 mass % water and 0.5 to 15 mass % polyvinylidene fluoride resin to a poor solvent of the polyvinylidene fluoride resin; or (Process a2) a process to precipitate polyvinylidene fluoride resin particles by performing a flash-crystallization of the solution. With such a configuration, PVDF resin particles can be industrially produced by simple operations without using surfactant agent.Type: GrantFiled: November 7, 2014Date of Patent: February 12, 2019Assignee: TORAY INDUSTRIES, INC.Inventors: Toshiya Takahashi, Kei Makita, Naoki Matsuda, Koya Ito, Yoshinori Kondo, Yuji Echigo
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Publication number: 20180338927Abstract: In a system where phase separation into two phases occurs when an ether cellulose derivative (A), a polymer (B) different from the ether cellulose derivative (A), and an alcohol solvent (C) are mixed together, the two phases including a solution phase mainly containing the ether cellulose derivative (A) and a solution phase mainly containing the polymer (B), the two separated phases containing approximately the same solvent, an emulsion is formed and brought into contact with a poor solvent (D) to provide an ether cellulose derivative microparticle having an average particle diameter of 1 to 1,000 ?m, a linseed oil absorption of 50 to 1,000 mL/100 g, and an average surface pore size of 0.05 to 5 ?m.Type: ApplicationFiled: October 26, 2016Publication date: November 29, 2018Inventors: Takahiko Otsubo, Kotoe Ohta, Yuji Echigo, Hiroshi Takezaki, Suguru Takaki, Satoshi Minakami, Akinori Ito, Hisashi Miyama
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Patent number: 10072377Abstract: A fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition is described. The prepreg includes at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin; [B] epoxy resin curing agent; and [C] polymer particles insoluble in epoxy resin.Type: GrantFiled: July 25, 2012Date of Patent: September 11, 2018Assignee: TORAY INDUSTRIES, INC.Inventors: Yuko Shimizu, Nobuyuki Tomioka, Shirou Honda, Maki Nagano, Yuji Echigo, Hiroshi Takezaki, Junko Kawasaki, Hiroshi Taiko
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Patent number: 9988501Abstract: A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.Type: GrantFiled: June 1, 2015Date of Patent: June 5, 2018Assignee: Toray Industries, Inc.Inventors: Yoshinori Kondo, Yuji Echigo, Akira Kitamura, Hiroshi Takezaki
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Patent number: 9920193Abstract: Provided are: fine vinylidene fluoride resin particles which are solid and have an average particle diameter of 0.3 ?m or more but less than 100 ?m, a particle diameter distribution index of 1-2, a repose angle of less than 40°, and an average sphericity of 80 or more said fine vinylidene fluoride particles being suitable for coating materials and coating applications; and a method for producing the fine vinylidene fluoride resin particles.Type: GrantFiled: August 26, 2013Date of Patent: March 20, 2018Assignee: TORAY INDUSTRIES, INC.Inventors: Yuji Echigo, Makiko Saito, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
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Publication number: 20170088677Abstract: A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.Type: ApplicationFiled: June 1, 2015Publication date: March 30, 2017Inventors: Yoshinori Kondo, Yuji Echigo, Akira Kitamura, Hiroshi Takezaki
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Publication number: 20170051116Abstract: A production method of polyvinylidene fluoride resin particles comprising: (Process a1) a process to precipitate the polyvinylidene fluoride resin particles by adding a 100 mass % solution in total consisting of 75 to 99 mass % organic solvent, 1 to 25 mass % water and 0.5 to 15 mass % polyvinylidene fluoride resin to a poor solvent of the polyvinylidene fluoride resin; or (Process a2) a process to precipitate polyvinylidene fluoride resin particles by performing a flash-crystallization of the solution. With such a configuration, PVDF resin particles can be industrially produced by simple operations without using surfactant agent.Type: ApplicationFiled: November 7, 2014Publication date: February 23, 2017Applicant: TORAY INDUSTRIES, INC.Inventors: Toshiya TAKAHASHI, Kei MAKITA, Naoki MATSUDA, Koya ITO, Yoshinori KONDO, Yuji ECHIGO
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Publication number: 20160304714Abstract: Fine polymer particles made by a method include producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other, and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 150° C. or more and 400° C. or less, an average particle diameter of 1 ?m or more to 100 ?m or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type polymer.Type: ApplicationFiled: June 30, 2016Publication date: October 20, 2016Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
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Patent number: 9410004Abstract: A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.Type: GrantFiled: August 8, 2013Date of Patent: August 9, 2016Assignee: Toray Industries, Inc.Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
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Publication number: 20150218359Abstract: Provided are: fine vinylidene fluoride resin particles which are solid and have an average particle diameter of 0.3 ?m or more but less than 100 ?m, a particle diameter distribution index of 1-2, a repose angle of less than 40°, and an average sphericity of 80 or more said fine vinylidene fluoride particles being suitable for coating materials and coating applications; and a method for producing the fine vinylidene fluoride resin particles.Type: ApplicationFiled: August 26, 2013Publication date: August 6, 2015Applicant: TORAY INDUSTRIES, INC.Inventors: Yuji Echigo, Makiko Saito, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
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Patent number: 9080048Abstract: A process of producing polymer microparticles wherein, in a system which includes a polymer (A), a polymer (B) and an organic solvent and can cause phase separation into two phases of a solution phase mainly composed of the polymer (A) and a solution phase mainly composed of the polymer (B) when the polymer (A), the polymer (B) and the organic solvent are dissolved and mixed together, after an emulsion is formed at a temperature of 100° C. or higher, the polymer (A) is precipitated by bringing a poor solvent for the polymer (A) into contact with the emulsion.Type: GrantFiled: September 27, 2011Date of Patent: July 14, 2015Assignee: Toray Industries, Inc.Inventors: Yuji Echigo, Itaru Asano, Hiroshi Kobayashi, Hiroshi Takezaki
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Publication number: 20140162518Abstract: The invention provides a fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition. The prepreg comprises at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin [B] epoxy resin curing agent [C] polymer particles insoluble in epoxy resin and falling under any of the following [Cx] to [Cz]: [Cx] polymer particles insoluble in epoxy resin and giving a particle diameter distribution chart meeting the following requirements from (x-i) to (x-iii): (x-i) the chart has at least two peaks, (x-ii) the particles giving the two highest peaks have a diameter ratio in the range of 1.Type: ApplicationFiled: July 25, 2012Publication date: June 12, 2014Applicant: TORAY INDUSTRIES, INC.Inventors: Yuko Shimizu, Nobuyuki Tomioka, Shirou Honda, Maki Nagano, Yuji Echigo, Hiroshi Takezaki, Junko Kawasaki, Hiroshi Taiko
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Publication number: 20130337263Abstract: A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.Type: ApplicationFiled: August 8, 2013Publication date: December 19, 2013Applicant: Toray Industries, Inc.Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
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Patent number: 8574669Abstract: A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.Type: GrantFiled: May 20, 2009Date of Patent: November 5, 2013Assignee: Toray Industries, Inc.Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
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Publication number: 20130281573Abstract: Provided are: a fiber-reinforced composite material which has mode I interlaminar fracture toughness, mode II interlaminar fracture toughness and compressive strength under heat and humidity conditions at the same time; an epoxy resin composition for obtaining the fiber-reinforced composite material; and a prepreg which is obtained using the epoxy resin composition. An epoxy resin composition for fiber-reinforced composite materials, which contains at least the following constituent elements (A), (B), (C) and (D). (A) An epoxy resin (B) Resin particles that satisfy the following conditions (b1)-(b3) and are insoluble in an epoxy resin (b1) The particle size distribution index is 1.0-1.8. (b2) The particle sphericity is 90 or more. (b3) The glass transition temperature of the particles is 80-180° C. (C) At least one elastomer component that is selected from among block copolymers containing a block having a glass transition temperature of 20° C.Type: ApplicationFiled: January 20, 2012Publication date: October 24, 2013Applicant: TORAY INDUSTRIES, INC.Inventors: Yuko Goto, Nobuyuki Tomioka, Yuji Echigo, Hiroaki Sakata, Shiro Honda, Hiroshi Taiko
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Publication number: 20130183528Abstract: A process of producing polymer microparticles wherein, in a system which includes a polymer (A), a polymer (B) and an organic solvent and can cause phase separation into two phases of a solution phase mainly composed of the polymer (A) and a solution phase mainly composed of the polymer (B) when the polymer (A), the polymer (B) and the organic solvent are dissolved and mixed together, after an emulsion is formed at a temperature of 100° C. or higher, the polymer (A) is precipitated by bringing a poor solvent for the polymer (A) into contact with the emulsion.Type: ApplicationFiled: September 27, 2011Publication date: July 18, 2013Inventors: Yuji Echigo, Itaru Asano, Hiroshi Kobayashi, Hiroshi Takezaki
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Publication number: 20110070442Abstract: A fine polymer particle production method includes producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, and bringing it into contact with a poor solvent for the polymer A to precipitate the polymer A. This method serves for easy synthesis of fine polymer particles with a narrow particle size distribution and the method can be effectively applied to production of highly heat-resistant polymers that have been difficult to produce with the conventional methods.Type: ApplicationFiled: May 20, 2009Publication date: March 24, 2011Applicant: Toray Industries, Inc.Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki