Patents by Inventor Yoichi Ishihara

Yoichi Ishihara 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).

  • Patent number: 9834450
    Abstract: A dispersion liquid contains fine particles of core-shell type inorganic oxide that have high dispersion stability and transparency and allow for excellent light resistance and weather resistance by being mixed in a coating film. The fine particles are produced by treating the surfaces of (a) fine particles of titanium-containing metal oxide serving as core particles with a hydrate and/or an oxide of a metal element such as zirconium to provide surface-treated particles or fine particles of titanium-containing metal oxide having (b) an intermediate layer and by covering the surfaces of the surface-treated particles to form (c) a shell layer with a composite oxide of silicon and at least one metal element selected from aluminum, zirconium, and antimony.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: December 5, 2017
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Patent number: 9534122
    Abstract: Provided are surface-treated fine particles which, when added to coatings for the production of films, exhibit excellent reactivity with respect to organosilicon compounds and resins that are matrix components of the coating films, and thereby allow the films to exhibit excellent performance. Oligomer-modified fine particles include inorganic oxide fine particles having a surface modified with an oligomer, the oligomer being derived from a metal alkoxide represented by Formula (1): RnM1(OR?)z-n (1) wherein M1: one or more elements selected from Si, Ti, Zr and Al; R and R?: one or more groups selected from alkyl groups of 1 to 8 carbon atoms, aryl groups and vinyl groups; n: an integer of from 0 to (z?2); and z: the valence of M1. The oligomer has a polymerization degree of 3 or more. The oligomer has a weight average molecular weight in the range of 1000 to 10000.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 3, 2017
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Patent number: 9441139
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. The process including (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: September 13, 2016
    Assignee: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 9234106
    Abstract: Core-shell type composite oxide fine particles are described in which the core particles are oxide fine particles or composite oxide fine particles that do not contain silicon and/or aluminum as main components, and the surface of the core particles is covered with a shell including a composite oxide that contains silicon and aluminum as main components, the shell containing silicon and aluminum in a weight ratio in terms of oxides, SiO2/Al2O3, in the range of 2.0 to 30.0. A dispersion liquid of the core-shell type composite oxide fine particles exhibits very high stability.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: January 12, 2016
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20150225609
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. The process including (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Application
    Filed: April 21, 2015
    Publication date: August 13, 2015
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 9039828
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. A process includes (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in the step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in the step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: May 26, 2015
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 8974592
    Abstract: The present invention relates to a coating composition containing metal oxide particles with a high refractive index and low photocatalytic activity and a coating film obtained by applying the coating composition onto a substrate. The coating composition contains metal oxide particles with a high refractive index obtained by coating the specific fine particles of the titanium-based oxide on their surfaces with at least a silica-based oxide or a silica-based composite oxide, and the coating film is obtained by applying the coating composition onto a substrate. The metal oxide particles with not only a high refractive index but also low photocatalytic activity, and therefore a coating film with excellent weathering resistance and light resistance can be formed on a substrate.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: March 10, 2015
    Assignee: JGC Catalysts and Chemicals, Ltd.
    Inventors: Yoichi Ishihara, Sachio Murai, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20140316046
    Abstract: Provided are surface-treated fine particles which, when added to coatings for the production of films, exhibit excellent reactivity with respect to organosilicon compounds and resins that are matrix components of the coating films, and thereby allow the films to exhibit excellent performance. Oligomer-modified fine particles include inorganic oxide fine particles having a surface modified with an oligomer, the oligomer being derived from a metal alkoxide represented by Formula (1): RnM1(OR?)z-n (1) wherein M1: one or more elements selected from Si, Ti, Zr and Al; R and R?: one or more groups selected from alkyl groups of 1 to 8 carbon atoms, aryl groups and vinyl groups; n: an integer of from 0 to (z?2); and z: the valence of M1. The oligomer has a polymerization degree of 3 or more. The oligomer has a weight average molecular weight in the range of 1000 to 10000.
    Type: Application
    Filed: December 21, 2012
    Publication date: October 23, 2014
    Applicant: JGC Catalysts and Chemicals Ltd
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Publication number: 20120132108
    Abstract: Core-shell type composite oxide fine particles are described in which the core particles are oxide fine particles or composite oxide fine particles that do not contain silicon and/or aluminum as main components, and the surface of the core particles is covered with a shell including a composite oxide that contains silicon and aluminum as main components, the shell containing silicon and aluminum in a weight ratio in terms of oxides, SiO2/Al2O3, in the range of 2.0 to 30.0. A dispersion liquid of the core-shell type composite oxide fine particles exhibits very high stability.
    Type: Application
    Filed: July 26, 2010
    Publication date: May 31, 2012
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20120103231
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. A process includes (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in the step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in the step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Application
    Filed: June 15, 2010
    Publication date: May 3, 2012
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Publication number: 20120065312
    Abstract: A dispersion liquid contains fine particles of core-shell type inorganic oxide that have high dispersion stability and transparency and allow for excellent light resistance and weather resistance by being mixed in a coating film. The fine particles are produced by treating the surfaces of (a) fine particles of titanium-containing metal oxide serving as core particles with a hydrate and/or an oxide of a metal element such as zirconium to provide surface-treated particles or fine particles of titanium-containing metal oxide having (b) an intermediate layer and by covering the surfaces of the surface-treated particles to form (c) a shell layer with a composite oxide of silicon and at least one metal element selected from aluminum, zirconium, and antimony.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 15, 2012
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Publication number: 20110257298
    Abstract: The present invention relates to a coating composition containing metal oxide particles with a high refractive index and low photocatalytic activity and a coating film obtained by applying the coating composition onto a substrate. The coating composition contains metal oxide particles with a high refractive index obtained by coating the specific fine particles of the titanium-based oxide on their surfaces with at least a silica-based oxide or a silica-based composite oxide, and the coating film is obtained by applying the coating composition onto a substrate. The metal oxide particles with not only a high refractive index but also low photocatalytic activity, and therefore a coating film with excellent weathering resistance and light resistance can be formed on a substrate.
    Type: Application
    Filed: August 12, 2009
    Publication date: October 20, 2011
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Sachio Murai, Toshiharu Hirai, Michio Komatsu
  • Patent number: 7758678
    Abstract: A housing of an air cleaner has an air inlet port and an air outlet port, and incorporates an air filter. In the housing, a fuel adsorption filter is arranged downstream of the air filter in such manner as to intersect an air passage. An open portion and a sheet-like adsorption portion are vertically defined in an outer frame of the fuel adsorption filter. The adsorption portion has a fuel adsorbing function. A weir is provided in a boundary between the open portion and the adsorption portion. The weir limits air flow from the upstream side of the adsorption portion to the upstream side of the open portion. A flow straightening plate having a flow straightening function is provided in the open portion.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: July 20, 2010
    Assignees: Toyota Boshoku Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiro Yoshida, Tatsuya Oyama, Haruhiko Saito, Tohru Ohba, Shinichi Kamiya, Masaki Aihara, Yoichi Ishihara
  • Patent number: 7494710
    Abstract: Fine metal particles are provided having surface resistance as low as about 102 to l04 ?/?, with excellent antistatic properties, anti-reflection properties, and electromagnetic shielding properties, and suitable for use in forming a transparent conductive coating film excellent in reliability and durability, and a process for producing the fine metal particles. The fine metal particles include iron and noniron metal having an average particle diameter in the range of from 1 to 200 nm and an iron content in the range of from 0.1 to 3.0% by weight. The noniron metal preferably is one or more metals selected from the group consisting of Au, Ag, Pd, Pt, Rh, Ru, Cu, Ni, Co, Sn, Ti, In, Al, Ta, and Sb. Part of the surface of the fine metal particles may be in the form of an oxide and/or a hydroxide.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: February 24, 2009
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Patent number: 7479469
    Abstract: Provided is a process for producing electrode catalyst fine particles capable of affording formed catalysts such as membranes excellent in uniformity and strength and also employable as catalyst to exhibit high catalytic activity over long periods because fine metal particles are highly distributed on carriers to make particle growth or the like less likely to occur. Electrode catalyst fine particles comprise fine particles which have an average particle diameter of 10 nm to 10 ?m and in which fine metal particles are supported on carrier particles, wherein a potential difference (absolute value of (II) minus (I)) between a flow potential (I) of a water dispersion of the fine metal particles at 1 wt % concentration and a pH of 3 to 8 and a flow potential (II) of a water dispersion of the carrier particles at 1 wt % concentration and a pH of 4 to 10, is in the range of 10 to 3000 mV.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: January 20, 2009
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20080257160
    Abstract: A housing of an air cleaner has an air inlet port and an air outlet port, and incorporates an air filter. In the housing, a fuel adsorption filter is arranged downstream of the air filter in such manner as to intersect an air passage. An open portion and a sheet-like adsorption portion are vertically defined in an outer frame of the fuel adsorption filter. The adsorption portion has a fuel adsorbing function. A weir is provided in a boundary between the open portion and the adsorption portion. The weir limits air flow from the upstream side of the adsorption portion to the upstream side of the open portion. A flow straightening plate having a flow straightening function is provided in the open portion.
    Type: Application
    Filed: April 16, 2008
    Publication date: October 23, 2008
    Applicants: TOYOTA BOSHOKU KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro YOSHIDA, Tatsuya OYAMA, Haruhiko SAITO, Tohru OHBA, Shinichi KAMIYA, Masaki AIHARA, Yoichi ISHIHARA
  • Publication number: 20050085379
    Abstract: Provided is a process for producing electrode catalyst fine particles capable of affording formed catalysts such as membranes excellent in uniformity and strength and also employable as catalyst to exhibit high catalytic activity over long periods because fine metal particles are highly distributed on carriers to make particle growth or the like less likely to occur. Electrode catalyst fine particles comprise fine particles which have an average particle diameter of 10 nm to 10 ?m and in which fine metal particles are supported on carrier particles, wherein a potential difference (absolute value of (II) minus (I)) between a flow potential (I) of a water dispersion of the fine metal particles at 1 wt % concentration and a pH of 3 to 8 and a flow potential (II) of a water dispersion of the carrier particles at 1 wt % concentration and a pH of 4 to 10, is in the range of 10 to 3000 mV.
    Type: Application
    Filed: October 15, 2004
    Publication date: April 21, 2005
    Inventors: Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu
  • Publication number: 20040112175
    Abstract: Subjects for the invention are to provide fine metal particles which have surface resistance as low as about 102 to 104 &OHgr;/▭, are excellent in antistatic properties, anti-reflection properties, and electromagnetic shielding properties, and are suitable for use in forming a transparent conductive coating film excellent in reliability and durability, and to provide a process for producing the fine metal particles.
    Type: Application
    Filed: September 29, 2003
    Publication date: June 17, 2004
    Inventors: Yoichi Ishihara, Toshiharu Hirai
  • Publication number: 20040016914
    Abstract: Disclosed is a coating liquid for forming a transparent conductive film, comprising conductive fine particles having an average particle diameter of 1 to 200 nm, silica particles having an average particle diameter of 4 to 200 nm and a polar solvent. The silica particles are in the form of chain silica particles having 2 to 10 silica particles on an average being connected. The content of an alkali in the silica particles is not more than 1000 ppm in terms of an alkali metal M.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 29, 2004
    Applicant: CATALYSTS & CHEMICALS INDUSTRIES CO., LTD.
    Inventors: Masayuki Matsuda, Mitsuaki Kumazawa, Yoichi Ishihara, Toshiharu Hirai, Michio Komatsu