Patents by Inventor Katsuya Himuro

Katsuya Himuro 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: 11680193
    Abstract: Provided are a low-temperature heat-curable adhesive composition for structures which is able to cure at a low temperature in a short time, is reduced in groove defects after open-state standing, and is excellent in rust-preventive property, corrosion resistance, shower resistance, and workability; and a method for producing an automotive structure using the adhesive composition. The low-temperature heat-curable adhesive composition for structures includes (A) an epoxy resin, (B) a micro-encapsulated curing agent, (C) a hygroscopic agent, (D) a viscosity modifier, and (E) a stabilizer. The hygroscopic agent (C) is calcium oxide, which suitably includes both a surface-treated grade and a non-surface-treated grade.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: June 20, 2023
    Assignees: CEMEDINE CO., LTD., MAZDA MOTOR CORPORATION
    Inventors: Daisuke Makino, Atsuhiko Suzuki, Yusuke Murachi, Motoyasu Asakawa, Katsuya Himuro, Kenichi Yamamoto
  • Patent number: 11059949
    Abstract: To provide prepreg having high thermostability and a molded body (fiber reinforced composite) obtained from the prepreg, the prepreg is formed by impregnating a reinforced fiber having an elastic modulus of 100 to 900 GPa with an epoxy resin composition including the following Components A to D so as to have a resin content within a range of 25 to 50 mass %: Component A: an epoxy resin having an oxazolidone ring structure in a molecule thereof; Component B: an epoxy resin that is liquid at 30° C.; Component C: a diblock copolymer having a B-M structure, wherein M is a block including at least 50 mass % of methyl methacrylate, B is a block immiscible with the epoxy resins and the block M, a glass transition temperature of the block B being 20° C. or lower; and Component D: dicyandiamide, or an amine curing agent that is a derivative of dicyandiamide.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: July 13, 2021
    Assignees: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Mazda Motor Corporation, Nippon Graphite Fiber Corporation
    Inventors: Koichi Hattori, Yutaka Arai, Masaki Shimada, Tetsuya Sugiyama, Katsuya Himuro, Masanori Honda, Kenji Nishida, Hironobu Takahama
  • Publication number: 20210102101
    Abstract: Provided are a low-temperature heat-curable adhesive composition for structures which is able to cure at a low temperature in a short time, is reduced in groove defects after open-state standing, and is excellent in rust-preventive property, corrosion resistance, shower resistance, and workability; and a method for producing an automotive structure using the adhesive composition. The low-temperature heat-curable adhesive composition for structures includes (A) an epoxy resin, (B) a micro-encapsulated curing agent, (C) a hygroscopic agent, (D) a viscosity modifier, and (E) a stabilizer. The hygroscopic agent (C) is calcium oxide, which suitably includes both a surface-treated grade and a non-surface-treated grade.
    Type: Application
    Filed: March 23, 2018
    Publication date: April 8, 2021
    Applicants: CEMEDINE CO., LTD., MAZDA MOTOR CORPORATION
    Inventors: Daisuke MAKINO, Atsuhiko SUZUKI, Yusuke MURACHI, Motoyasu ASAKAWA, Katsuya HIMURO, Kenichi YAMAMOTO
  • Patent number: 10774247
    Abstract: The present invention provides a one-component type thermosetting adhesive composition used as an automotive structural adhesive having high damping performance without reducing adhesive strength and having excellent low-temperature curability and a body structure for vehicle, on which the one-component type thermosetting adhesive composition is applied. The present invention relates to a one-component type thermosetting adhesive composition comprising an epoxy resin and an amine-based latent curing agent, wherein the epoxy resin comprises: (1) a dibasic acid ester-based epoxy resin, (2) a butadiene-acrylonitrile copolymer modified epoxy resin, and (3) an unmodified bisphenol A type epoxy resin, and wherein a thermally cured product formed from the composition has: a loss tangent tan ? at 23° C. of not less than 0.2 as a damping performance, and a Young's modulus of not less than 50 MPa, and a body structure for vehicle, on which the one-component type thermosetting adhesive composition is applied.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: September 15, 2020
    Assignees: SUNSTAR ENGINEERING INC., MAZDA MOTOR CORPORATION
    Inventors: Takatomi Nishida, Shohei Yanagisawa, Katsuya Himuro, Kenichi Yamamoto, Motoyasu Asakawa, Tomoya Yoshida
  • Publication number: 20200102436
    Abstract: To provide prepreg having high thermostability and a molded body (fiber reinforced composite) obtained from the prepreg, the prepreg is formed by impregnating a reinforced fiber having an elastic modulus of 100 to 900 GPa with an epoxy resin composition including the following Components A to D so as to have a resin content within a range of 25 to 50 mass %: Component A: an epoxy resin having an oxazolidone ring structure in a molecule thereof; Component B: an epoxy resin that is liquid at 30° C.; Component C: a diblock copolymer having a B-M structure, wherein M is a block including at least 50 mass % of methyl methacrylate, B is a block immiscible with the epoxy resins and the block M, a glass transition temperature of the block B being 20° C. or lower; and Component D: dicyandiamide, or an amine curing agent that is a derivative of dicyandiamide.
    Type: Application
    Filed: September 24, 2019
    Publication date: April 2, 2020
    Inventors: Koichi Hattori, Yutaka Arai, Masaki Shimada, Tetsuya Sugiyama, Katsuya Himuro, Masanori Honda, Kenji Nishida, Hironobu Takahama
  • Patent number: 10279843
    Abstract: A reinforcing body is disposed in a closed cross sectional portion constituted by one or more vehicle body components. The reinforcing body is provided with a joining portion to be joined to the vehicle body components. The joining portion includes hard connecting portions connected to the vehicle body components in an abutting state, and a soft connecting portion connected to the vehicle body components via a vibration damping member. The storage shear rigidity (KB?) of the vibration damping member is set in the range: 800 N/mm<KB?<57500 N/mm.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: May 7, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kohya Nakagawa, Kuniaki Nagao, Kenichi Yamamoto, Motoyasu Asakawa, Katsuya Himuro
  • Publication number: 20190062611
    Abstract: The present invention provides a one-component type thermosetting adhesive composition used as an automotive structural adhesive having high damping performance without reducing adhesive strength and having excellent low-temperature curability and a body structure for vehicle, on which the one-component type thermosetting adhesive composition is applied. The present invention relates to a one-component type thermosetting adhesive composition comprising an epoxy resin and an amine-based latent curing agent, wherein the epoxy resin comprises: (1) a dibasic acid ester-based epoxy resin, (2) a butadiene-acrylonitrile copolymer modified epoxy resin, and (3) an unmodified bisphenol A type epoxy resin, and wherein a thermally cured product formed from the composition has: a loss tangent tan ? at 23° C. of not less than 0.2 as a damping performance, and a Young's modulus of not less than 50 MPa, and a body structure for vehicle, on which the one-component type thermosetting adhesive composition is applied.
    Type: Application
    Filed: August 23, 2018
    Publication date: February 28, 2019
    Inventors: Takatomi NISHIDA, Shohei YANAGISAWA, Katsuya HIMURO, Kenichi YAMAMOTO, Motoyasu ASAKAWA, Tomoya YOSHIDA
  • Publication number: 20160325785
    Abstract: A reinforcing body is disposed in a closed cross sectional portion constituted by one or more vehicle body components. The reinforcing body is provided with a joining portion to be joined to the vehicle body components. The joining portion includes hard connecting portions connected to the vehicle body components in an abutting state, and a soft connecting portion connected to the vehicle body components via a vibration damping member. The storage shear rigidity (KB?) of the vibration damping member is set in the range: 800 N/mm<KB?<57500 N/mm.
    Type: Application
    Filed: January 30, 2015
    Publication date: November 10, 2016
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kohya NAKAGAWA, Kuniaki NAGAO, Kenichi YAMAMOTO, Motoyasu ASAKAWA, Katsuya HIMURO
  • Patent number: 8981249
    Abstract: A gap is provided at joining faces of a pair of metal works with an uneven shape when the metal works contact one another for joining. An adhesive agent having a chain-reacting curing reaction function is disposed within the gap. The adhesive agent is cured by an autogenously-generated curing reaction heat caused by an outer energy and an additional heat that is successively generated by the autogenously-generated curing reaction heat within the adhesive agent. A welding portion, where the works contact one another substantially directly, is welded by a laser beam, and the above-described energy for causing the autogenously-generated curing reaction heat for the adhesive agent is provided by the laser beam. Accordingly, a joining structure and method of metal works that can have less limitation in a joining location is provided.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: March 17, 2015
    Assignee: Mazda Motor Corporation
    Inventors: Chikara Tanaka, Katsuya Himuro, Yoichiro Kitahara
  • Patent number: 7985317
    Abstract: There are provided an adhesive-agent disposing step of disposing the adhesive agent, a first curing step of curing part of the adhesive agent disposed (including an adhesive-agent-disposition providing step of the present invention), a painting step of coating a paint on the works, and a heating step (a second curing step) of applying a heating treatment with a drying device. There can be provided a joining method of works that can ensure a high joining quality and productivity.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: July 26, 2011
    Assignee: Mazda Motor Corporation
    Inventors: Katsuya Himuro, Chikara Tanaka, Masatoshi Shinomori
  • Publication number: 20090236039
    Abstract: A heat energy as a second trigger energy is applied to an overlap portions in such a manner that a terminal portion of a first chain-reacting cure area which is presumed to be generated by applying the heat energy as a first trigger energy to an vehicle-body assembly member overlaps a start portion of a second chain-reacting cure area which is to be generated by applying the heat energy as the second trigger energy to the adhesive agent between the vehicle-body assembly member and the vehicle-body member. Accordingly, the adhesive agent can be made cure surely.
    Type: Application
    Filed: January 8, 2009
    Publication date: September 24, 2009
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikara TANAKA, Katsuya HIMURO
  • Publication number: 20080314515
    Abstract: There are provided an adhesive-agent disposing step of disposing the adhesive agent, a first curing step of curing part of the adhesive agent disposed (including an adhesive-agent-disposition providing step of the present invention), a painting step of coating a paint on the works, and a heating step (a second curing step) of applying a heating treatment with a drying device. There can be provided a joining method of works that can ensure a high joining quality and productivity.
    Type: Application
    Filed: June 16, 2008
    Publication date: December 25, 2008
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Katsuya HIMURO, Chikara TANAKA, Masatoshi SHINOMORI
  • Publication number: 20080237203
    Abstract: A gap is provided at joining faces of a pair of metal works with an uneven shape when the metal works contact one another for joining. An adhesive agent having a chain-reacting curing reaction function is disposed within the gap. The adhesive agent is cured by an autogenously-generated curing reaction heat caused by an outer energy and an additional heat that is successively generated by the autogenously-generated curing reaction heat within the adhesive agent. A welding portion, where the works contact one another substantially directly, is welded by a laser beam, and the above-described energy for causing the autogenously-generated curing reaction heat for the adhesive agent is provided by the laser beam. Accordingly, a joining structure and method of metal works that can has less limitation in a joining location is provided.
    Type: Application
    Filed: January 28, 2008
    Publication date: October 2, 2008
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikara TANAKA, Katsuya HIMURO, Yoichiro KITAHARA