Patents by Inventor Itaru Asano

Itaru Asano 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).

  • Publication number: 20200377670
    Abstract: A polysiloxane-polyalkylene glycol block copolymer is obtained by reacting a polysiloxane (A) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, an epoxy group, a carboxyl group, and an amino group with a polyalkylene glycol (B) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, a thiol group, and an isocyanate group, wherein a content of a structure derived from the polysiloxane (A) is 20% by mass or more and 90% by mass or less with respect to 100% by mass of the polysiloxane-polyalkylene glycol block copolymer.
    Type: Application
    Filed: May 24, 2018
    Publication date: December 3, 2020
    Inventors: Hiroko Tanaka, Yuka Isago, Itaru Asano, Hiroshi Takezaki, Hisashi Miyama, Shiro Honda
  • Publication number: 20200048413
    Abstract: A method produces polyamide fine particles by polymerizing a polyamide monomer (A) in the presence of a polymer (B) at a temperature equal to or higher than the crystallization temperature of a polyamide to be obtained, wherein the polyamide monomer (A) and the polymer (B) are homogeneously dissolved at the start of polymerization, and polyamide fine particles are precipitated after the polymerization. Polyamide fine particles have a number average particle size of 0.1 to 100 ?m, a sphericity of 90 or more, a particle size distribution index of 3.0 or less, a linseed oil absorption of 100 mL/100 g or less, and a crystallization temperature of 150° C. or more. In particular, a polyamide having a high crystallization temperature includes fine particles having a smooth surface, a narrow particle size distribution, and high sphericity.
    Type: Application
    Filed: May 7, 2018
    Publication date: February 13, 2020
    Inventor: Itaru Asano
  • Patent number: 10239970
    Abstract: 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: Grant
    Filed: June 30, 2016
    Date of Patent: March 26, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
  • Patent number: 10125252
    Abstract: By first forming an emulsion in a system that separates into two phases which include a solution phase containing an ethylene-vinyl alcohol copolymer (A) as the main component and a solution phase containing a polymer (B) different from the ethylene-vinyl alcohol copolymer (A) as the main component when the copolymer (A), the polymer (B), and an organic solvent (C) having an SP value of 20 (J/cm3)1/2 to 30 (J/cm3)1/2 are dissolved and mixed together, and then causing the ethylene-vinyl alcohol copolymer (A) to precipitate as microparticles by bringing a poor solvent (D) of the ethylene-vinyl alcohol copolymer (A) into contact with the emulsion, it is possible to obtain ethylene-vinyl alcohol copolymer microparticles that have a narrow particle size distribution wherein the particle size distribution index in a dry-powder state is 2 or less, have a true spherical particle shape, and exhibit excellent re-dispersibility into liquid.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: November 13, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Takahiko Otsubo, Itaru Asano, Hiroshi Takezaki
  • Patent number: 9920193
    Abstract: 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: Grant
    Filed: August 26, 2013
    Date of Patent: March 20, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuji Echigo, Makiko Saito, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Patent number: 9777130
    Abstract: Polyphenylene sulfide microparticles have a linseed oil absorption amount of 40 to 1,000 mL/100 g and a number average particle diameter of 1 to 200 ?m. The porous PPS microparticles have a large specific surface area and therefore promote fusion of particles when molded into various molded bodies by applying thermal energy, thus enabling formation or molding of a coating layer of particles at a lower temperature in a shorter time. The porous PPS microparticles have a porous shape and therefore enable scattering light in multiple directions and suppression of specific reflection of reflected light in a specific direction, thus making it possible to impart shading effect and matte effect when added to a medium.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 3, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Takahiko Otsubo, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Patent number: 9567443
    Abstract: A method of producing polycarbonate-based polymer microparticles including forming an emulsion in a system in which a polycarbonate-based polymer (A), a polymer (B) different from the polycarbonate-based polymer (A) and an organic solvent (C) are dissolved and mixed together and which causes phase separation into two phases of a solution phase having the polycarbonate-based polymer (A) as its main component and a solution phase having the polymer (B) different from the polycarbonate-based polymer (a) as its main component, and contacting a poor solvent for the polycarbonate-based polymer (A) with the emulsion at a temperature of 80° C. or higher to thereby precipitate microparticles of the polycarbonate-based polymer (A).
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: February 14, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Itaru Asano, Hiroshi Takezaki
  • Publication number: 20160311995
    Abstract: Polyphenylene sulfide microparticles have a linseed oil absorption amount of 40 to 1,000 mL/100 g and a number average particle diameter of 1 to 200 ?m. The porous PPS microparticles have a large specific surface area and therefore promote fusion of particles when molded into various molded bodies by applying thermal energy, thus enabling formation or molding of a coating layer of particles at a lower temperature in a shorter time. The porous PPS microparticles have a porous shape and therefore enable scattering light in multiple directions and suppression of specific reflection of reflected light in a specific direction, thus making it possible to impart shading effect and matte effect when added to a medium.
    Type: Application
    Filed: December 17, 2014
    Publication date: October 27, 2016
    Inventors: Takahiko Otsubo, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Publication number: 20160304714
    Abstract: 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: Application
    Filed: June 30, 2016
    Publication date: October 20, 2016
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
  • Patent number: 9410004
    Abstract: 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: Grant
    Filed: August 8, 2013
    Date of Patent: August 9, 2016
    Assignee: Toray Industries, Inc.
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
  • Publication number: 20160122523
    Abstract: By first forming an emulsion in a system that separates into two phases which include a solution phase containing an ethylene-vinyl alcohol copolymer (A) as the main component and a solution phase containing a polymer (B) different from the ethylene-vinyl alcohol copolymer (A) as the main component when the copolymer (A), the polymer (B), and an organic solvent (C) having an SP value of 20 (J/cm3)1/2 to 30 (J/cm3)1/2 are dissolved and mixed together, and then causing the ethylene-vinyl alcohol copolymer (A) to precipitate as microparticles by bringing a poor solvent (D) of the ethylene-vinyl alcohol copolymer (A) into contact with the emulsion, it is possible to obtain ethylene-vinyl alcohol copolymer microparticles that have a narrow particle size distribution wherein the particle size distribution index in a dry-powder state is 2 or less, have a true spherical particle shape, and exhibit excellent re-dispersibility into liquid.
    Type: Application
    Filed: May 21, 2014
    Publication date: May 5, 2016
    Applicant: Toray Industries, Inc.
    Inventors: Takahiko Otsubo, Itaru Asano, Hiroshi Takezaki
  • Publication number: 20150318067
    Abstract: Conductive microparticles, each are composed of a polymer microparticle and a conductive layer formed by coating the surface of the polymer microparticle with a metal. The conductive microparticles have an elastic modulus (E) at 5% displacement of 1-100 MPa. Especially when the conductive microparticles have a shape recovery ratio (SR) of 0.1-13% under a load of 9.8 mN, a particle size distribution index of 1-3 and a particle size of 0.1-100 ?m, the conductive microparticles can exhibit excellent conduction reliability in applications such as conductive adhesives for flexible boards.
    Type: Application
    Filed: January 14, 2014
    Publication date: November 5, 2015
    Inventors: Itaru Asano, Ayano Ohno, Hiroshi Takezaki
  • Publication number: 20150218359
    Abstract: 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: Application
    Filed: August 26, 2013
    Publication date: August 6, 2015
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yuji Echigo, Makiko Saito, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Patent number: 9080048
    Abstract: 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: Grant
    Filed: September 27, 2011
    Date of Patent: July 14, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Yuji Echigo, Itaru Asano, Hiroshi Kobayashi, Hiroshi Takezaki
  • Publication number: 20150183928
    Abstract: A process of producing polylactic acid-based resin microparticles includes a dissolving step that forms a system, which can cause phase separation into two phases of a solution phase mainly composed of polylactic acid-based resin (A) having an enthalpy of fusion of less than 5 J/g and a solution phase mainly composed of polymer (B) different from polylactic acid-based resin, by dissolving the polylactic acid-based resin (A) and the polymer (B) different from polylactic acid-based resin in an ether-based organic solvent (C); an emulsion-forming step that forms an emulsion by applying a shear force to the system; and a microparticle-forming step that precipitates polylactic acid-based resin microparticles by contacting the emulsion with a poor solvent which has lower solubility of the polylactic acid-based resin (A) than the ether-based organic solvent (C).
    Type: Application
    Filed: March 17, 2015
    Publication date: July 2, 2015
    Inventors: Hiroshi Takezaki, Hiroshi Kobayashi, Makiko Saito, Itaru Asano
  • Patent number: 9017812
    Abstract: A process of producing polylactic acid-based resin microparticles includes a dissolving process that forms a system, which can cause phase separation into two phases of a solution phase mainly composed of polylactic acid-based resin (A) and a solution phase mainly composed of polymer (B) different from polylactic acid-based resin, by dissolving the polylactic acid-based resin (A) and the polymer (B) different from polylactic acid-based resin in an ether-based organic solvent (C), an emulsion-forming process that forms an emulsion by applying a shear force to the system, and a microparticle-forming process that precipitates polylactic acid-based resin microparticles by contacting the emulsion with a poor solvent which has lower solubility of the polylactic acid-based resin (A) than the ether-based organic solvent (C).
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 28, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Hiroshi Takezaki, Hiroshi Kobayashi, Makiko Saito, Itaru Asano
  • Publication number: 20150024205
    Abstract: A method of producing polycarbonate-based polymer microparticles including forming an emulsion in a system in which a polycarbonate-based polymer (A), a polymer (B) different from the polycarbonate-based polymer (A) and an organic solvent (C) are dissolved and mixed together and which causes phase separation into two phases of a solution phase having the poly-carbonate-based polymer (A) as its main component and a solution phase having the polymer (B) different from the polycarbonate-based polymer (a) as its main component, and contacting a poor solvent for the polycarbonate-based polymer (A) with the emulsion at a temperature of 80° C. or higher to thereby precipitate microparticles of the polycarbonate-based polymer (A).
    Type: Application
    Filed: January 18, 2013
    Publication date: January 22, 2015
    Inventors: Itaru Asano, Hiroshi Takezaki
  • Publication number: 20130337263
    Abstract: 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: Application
    Filed: August 8, 2013
    Publication date: December 19, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
  • Publication number: 20130309497
    Abstract: A process of producing polylactic acid-based resin microparticles includes a dissolving process that forms a system, which can cause phase separation into two phases of a solution phase mainly composed of polylactic acid-based resin (A) and a solution phase mainly composed of polymer (B) different from polylactic acid-based resin, by dissolving the polylactic acid-based resin (A) and the polymer (B) different from polylactic acid-based resin in an ether-based organic solvent (C), an emulsion-forming process that forms an emulsion by applying a shear force to the system, and a microparticle-forming process that precipitates polylactic acid-based resin microparticles by contacting the emulsion with a poor solvent which has lower solubility of the polylactic acid-based resin (A) than the ether-based organic solvent (C).
    Type: Application
    Filed: December 22, 2011
    Publication date: November 21, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Hiroshi Takezaki, Hiroshi Kobayashi, Makiko Saito, Itaru Asano
  • Patent number: 8574669
    Abstract: 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: Grant
    Filed: May 20, 2009
    Date of Patent: November 5, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki