Patents by Inventor Masahiro Hakotani

Masahiro Hakotani 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: 20240141090
    Abstract: An unsaturated polyester resin composition contains an unsaturated polyester, a vinyl ester, a polymerizable monomer, and an aluminum hydroxide. The vinyl ester is a reaction product of an epoxy resin and an unsaturated monobasic acid. The vinyl ester is blended in a predetermined ratio to the unsaturated polyester. The aluminum hydroxide is blended in a predetermined ratio to the vinyl ester.
    Type: Application
    Filed: November 9, 2020
    Publication date: May 2, 2024
    Inventors: Ikuo AKAI, Masahiro HAKOTANI, Takashi TSUKAMOTO
  • Patent number: 11753520
    Abstract: An unsaturated polyester resin composition includes a resin component containing an unsaturated polyester and a polymerizable monomer, an aluminum hydroxide, and an expandable graphite. The mixing ratio of the aluminum hydroxide to 100 parts by mass of the resin component is 50 parts by mass or more and 300 parts by mass or less. The mixing ratio of the expandable graphite to 100 parts by mass of the resin component is 3 parts by mass or more and 10 parts by mass or less. The expandable graphite has an average particle size of 150 ?m or less.
    Type: Grant
    Filed: October 4, 2021
    Date of Patent: September 12, 2023
    Assignee: JAPAN COMPOSITE CO., LTD.
    Inventors: Ikuo Akai, Masahiro Hakotani
  • Publication number: 20230227623
    Abstract: An unsaturated polyester resin composition includes a resin component containing an unsaturated polyester and a polymerizable monomer, an aluminum hydroxide, and an expandable graphite. The mixing ratio of the aluminum hydroxide to 100 parts by mass of the resin component is 50 parts by mass or more and 300 parts by mass or less. The mixing ratio of the expandable graphite to 100 parts by mass of the resin component is 3 parts by mass or more and 10 parts by mass or less. The expandable graphite has an average particle size of 150 ?m or less.
    Type: Application
    Filed: October 4, 2021
    Publication date: July 20, 2023
    Inventors: Ikuo AKAI, Masahiro HAKOTANI
  • Publication number: 20230183433
    Abstract: A thin plate molding material includes a resin composition containing a resin component and a filling material, and a reinforced fiber with a predetermined fiber length. The content ratio of the reinforced fiber is a predetermined ratio. The mixing ratio of the resin component is a predetermined ratio.
    Type: Application
    Filed: April 22, 2021
    Publication date: June 15, 2023
    Inventors: Masahiro HAKOTANI, Hirokuni FUJITA, Takashi TSUKAMOTO
  • Publication number: 20220089864
    Abstract: An unsaturated polyester resin composition includes an unsaturated polyester, a polymerizable monomer, a low shrinkage agent, aluminum hydroxide, and an electrically conductive filler. The unsaturated polyester is a polymerization product of a polybasic acid including a polybasic acid having an ethylenically unsaturated double bond at a predetermined ratio and a polyhydric alcohol. A polyvinyl acetate as the low shrinkage agent is included at a predetermined ratio with respect to the total amount of the unsaturated polyester, the polymerizable monomer, and the low shrinkage agent. The aluminum hydroxide is included at a predetermined ratio with respect to the total amount of the unsaturated polyester, the polymerizable monomer, and the low shrinkage agent.
    Type: Application
    Filed: January 29, 2020
    Publication date: March 24, 2022
    Inventors: Ikuo AKAI, Masahiro HAKOTANI, Takashi TSUKAMOTO
  • Publication number: 20210380801
    Abstract: An unsaturated polyester resin composition includes: a resin component comprising an unsaturated polyester, a polymerizable monomer, and a low profile agent; aluminum hydroxide; and a fire retardant. The unsaturated polyester is a polymerized product of polybasic acid and polyhydric alcohol. The polybasic acid has an ethylenic unsaturated double bond at a predetermined ratio. The polyvinyl acetate is blended as a low profile agent relative to the resin component at a predetermined ratio. Aluminum hydroxide is blended relative to the resin component at a predetermined ratio.
    Type: Application
    Filed: October 16, 2019
    Publication date: December 9, 2021
    Inventors: Ikuo AKAI, Masahiro HAKOTANI, Takashi TSUKAMOTO
  • Publication number: 20210139629
    Abstract: An unsaturated polyester resin composition includes an unsaturated polyester, a polymerizable monomer, a low profile agent, and aluminum hydroxide. The unsaturated polyester is a polymerized product of polybasic acid and polyhydric alcohol. The polybasic acid contains unsaturated polybasic acid, and the unsaturated polybasic acid is blended in an amount of 80 mol % or more relative to 100 mol % the polybasic acid. The low profile agent contains polyvinyl acetate, and the polyvinyl acetate is blended in an amount of 3 parts by mass or more and 10 parts by mass or less relative to 100 parts by mass of a total amount of the unsaturated polyester, polymerizable monomer, and low profile agent. The aluminum hydroxide is blended in an amount of 150 parts by mass or more and 300 parts by mass or less relative to 100 parts by mass of a total amount of the unsaturated polyester, polymerizable monomer, and low profile agent.
    Type: Application
    Filed: April 5, 2019
    Publication date: May 13, 2021
    Inventors: Ikuo AKAI, Satoshi TAMURA, Kenji TSUBOI, Masahiro HAKOTANI
  • Patent number: 6592986
    Abstract: The present invention presents an SMC with which the electrically conductive layer does not break down or become non-uniform during molding and with which molded articles with excellent electromagnetic wave shielding capability and electric conductivity can be produced. This SMC is a thermosetting resin sheet molding compound having at least one continuous layer of electrically conductive fibers with a fiber length of 50 &mgr; to 5 mm, and it is further preferred that electrically conductive powder is uniformly dispersed throughout the entire molding compound. These SMCs can be produced by impregnating a reinforcing material with a thermosetting resin composition which is combined with the above-mentioned electrically conductive fibers, or the electrically conductive fibers and electrically conductive powder, and forming at least one continuous layer of these electrically conductive fibers adjacent to this reinforcement layer.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: July 15, 2003
    Assignee: Mitsui Takeda Chemicals Inc.
    Inventors: Masahiro Hakotani, Koichi Akiyama, Hiromu Miyashita, Takashi Shibata
  • Patent number: 6245419
    Abstract: An unsaturated polyester resin composition having excellent vibration-damping properties, comprising an unsaturated polyester resin (A) having a glass transition temperature (Tg) of 0° C. or more and less than 60° C. In the composition, the unsaturated polyester resin (A) may be blended with an unsaturated polyester resin (B) having a glass transition temperature (Tg) of 150° C. or more and less than 200° C. or an unsaturated polyester resin (C) having a glass transition temperature (Tg) of 200° C. or more. Further, the composition may contain an elastomer (D) having a glass transition temperature (Tg) of −50° C. or more and less than 100° C.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: June 12, 2001
    Assignees: Takeda Chemical Industries, Ltd., Toyota Jidosha Kabushiki Kaisha, Uchihamakasei Kabushiki Kaisha
    Inventors: Masahiro Hakotani, Koichi Akiyama, Takashi Shibata, Kaneo Hamajima, Osamu Kito, Hiroyuki Takahashi, Kazuhiro Uchida
  • Patent number: 5484276
    Abstract: An apparatus for curing a sheet molding compound which comprises at least one pair of molds disposed along a path of transport of the sheet molding compound. The molds defines a cavity therebetween for passage of the sheet molding compound, which has been generally semi- cured and shaped by a shaping apparatus to a predetermined shape, to heat the generally semi-cured sheet molding compound. At least one of the molds is in the form of a movable mold effective to vary a cross-sectional shape of the cavity to follow a thermal expansion and shrinkage which take place in the sheet molding compound during a curing process.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: January 16, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yuzo Hayakawa, Masahiro Hakotani