Patents by Inventor Hidekazu Kurimoto

Hidekazu Kurimoto 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: 10981437
    Abstract: A weather strip includes an ethylene-?-olefin-nonconjugated diene copolymer rubber composition having a volume resistivity of no less than 1.0E+6 ?·cm and having a specific gravity of less than 1.30, the rubber composition including: carbon black in an amount of 40 parts by mass to 140 parts by mass; and at least one polymer having a specific gravity of no more than 1.8 and an ethylene content of no more than 70 wt % and at least one polymer having a specific gravity of no more than 1.8 and an ethylene content of no less than 70 wt % in a collective amount of 5 parts by mass to 50 parts by mass, per 100 parts by mass of an EPDM polymer. At least a mount base of the weather strip, which is to be mounted to a car body, is formed of the rubber composition.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: April 20, 2021
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Mitsue Tanaka, Hidekazu Kurimoto
  • Patent number: 10894880
    Abstract: A rubber composition contains: at least one rubber component selected from the group consisting of an ethylene propylene diene rubber, a chloroprene rubber, a nitrile rubber, and an acrylic rubber; 1.5 to 30 parts by mass of a fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and 30 to 120 parts by mass of a carbon-based filler per 100 parts by mass of the rubber component. A method of producing a rubber composition comprises: kneading a dispersion of a fluorene-modified cellulose nanofiber in a process oil and a rubber component to prepare a kneaded material; and mixing a vulcanizing agent into the kneaded material.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: January 19, 2021
    Assignees: TOYODA GOSEI CO., LTD., OSAKA GAS CO., LTD.
    Inventors: Yuta Arakawa, Yasuhiro Yamaguchi, Hidekazu Kurimoto, Masahiro Yamada, Hiroki Sakamoto
  • Patent number: 10875994
    Abstract: A rubber includes 5 parts by mass to 45 parts by mass of an uncross-linked EPM relative to 100 parts by mass of a cross-linked rubber polymer (other than EPM), and an oil in an amount equal to or more than the amount of the EPM. The rubber is foamed and has a specific gravity of more than 0.3 and 0.8 or less. A weather strip 1 and a hose 2 are formed of the rubber.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: December 29, 2020
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Naoyuki Akahori, Hidekazu Kurimoto, Naoki Iwase
  • Patent number: 10731017
    Abstract: A foam rubber molded produce obtained by molding a rubber composition containing 100 parts by mass of ethylene-?-olefin-nonconjugated diene copolymer, 4 to 30 parts by mass of amorphous 4-methyl-1-pentene copolymer, 2 to 8 parts by mass of blowing agent, and a sulfur-based vulcanizing agent, and having a Mooney viscosity after kneading (ML1+4, 100° C.) of 54 or less. A specific gravity is 0.3 to 0.8, a compression set is less than 27%, and a foam state is an interconnected cell.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: August 4, 2020
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Naoyuki Akahori, Hidekazu Kurimoto, Yasuhiro Yamaguchi
  • Publication number: 20190299764
    Abstract: A thermoplastic elastomer composition includes 15 mass % or more and 36 mass % or less of organically modified nanodiamond contained in a base material formed of dynamically cross-linked thermoplastic elastomer. Good sliding property is obtained and excellent wear resistance is realized by containing the 15 mass % or more of organically modified nanodiamond.
    Type: Application
    Filed: March 20, 2019
    Publication date: October 3, 2019
    Inventors: Seira MORIYA, Ryota KISHI, Hidekazu KURIMOTO, Yasuhiro YAMAGUCHI
  • Publication number: 20190300663
    Abstract: A method of producing a sealing member for a fuel cell includes: setting a base material made of a modified polypropylene in a mold; bringing a hydrosilicone crosslinked ethylene/?-olefin/non-conjugated diene copolymer into contact with the base material and performing molding in the mold; and vulcanizing the hydrosilicone crosslinked ethylene/?-olefin/non-conjugated diene copolymer and at the same time, bonding the hydrosilicone crosslinked ethylene/?-olefin/non-conjugated diene copolymer and the base material by vulcanization, in the mold with a molding temperature set to a temperature that is higher than a vulcanization start temperature of the hydrosilicone crosslinked ethylene/?-olefin/non-conjugated diene copolymer and lower than a melting point of the modified polypropylene.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Inventors: Akishige SEO, Mitsue TANAKA, Kenichiro KANEKO, Yoshiaki MASE, Hidekazu KURIMOTO
  • Publication number: 20190300689
    Abstract: A rubber composition contains: at least one rubber component selected from the group consisting of an ethylene propylene diene rubber, a chloroprene rubber, a nitrile rubber, and an acrylic rubber; 1.5 to 30 parts by mass of a fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and 30 to 120 parts by mass of a carbon-based filler per 100 parts by mass of the rubber component. A method of producing a rubber composition comprises: kneading a dispersion of a fluorene-modified cellulose nanofiber in a process oil and a rubber component to prepare a kneaded material; and mixing a vulcanizing agent into the kneaded material.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 3, 2019
    Inventors: Yuta ARAKAWA, Yasuhiro YAMAGUCHI, Hidekazu KURIMOTO, Masahiro YAMADA, Hiroki SAKAMOTO
  • Publication number: 20190263992
    Abstract: A foam rubber molded produce obtained by molding a rubber composition containing 100 parts by mass of ethylene-?-olefin-nonconjugated diene copolymer, 4 to 30 parts by mass of amorphous 4-methyl-1-pentene copolymer, 2 to 8 parts by mass of blowing agent, and a sulfur-based vulcanizing agent, and having a Mooney viscosity after kneading (ML1+4, 100° C.) of 54 or less. A specific gravity is 0.3 to 0.8, a compression set is less than 27%, and a foam state is an interconnected cell.
    Type: Application
    Filed: January 15, 2019
    Publication date: August 29, 2019
    Inventors: Naoyuki AKAHORI, Hidekazu KURIMOTO, Yasuhiro YAMAGUCHI
  • Publication number: 20190169412
    Abstract: A thermoplastic elastomer composition contains 22 to 50 parts by mass of a crosslinked ethylene/propylene/non-conjugated diene copolymer (A), 25 to 66 parts by mass of a 4-methyl-1-pentene/propylene copolymer (B), and 13 to 30 parts by mass of polypropylene (C), based on 100 parts by mass of a total of (A), (B), and (C).
    Type: Application
    Filed: February 13, 2018
    Publication date: June 6, 2019
    Inventors: Atsuko SATO, Yasuhiro YAMAGUCHI, Hidekazu KURIMOTO
  • Publication number: 20190061501
    Abstract: A weather strip includes an ethylene-?-olefin-nonconjugated diene copolymer rubber composition having a volume resistivity of no less than 1.0E+6 ?·cm and having a specific gravity of less than 1.30, the rubber composition including: carbon black in an amount of 40 parts by mass to 140 parts by mass; and at least one polymer having a specific gravity of no more than 1.8 and an ethylene content of no more than 70 wt % and at least one polymer having a specific gravity of no more than 1.8 and an ethylene content of no less than 70 wt % in a collective amount of 5 parts by mass to 50 parts by mass, per 100 parts by mass of an EPDM polymer. At least a mount base of the weather strip, which is to be mounted to a car body, is formed of the rubber composition.
    Type: Application
    Filed: February 23, 2017
    Publication date: February 28, 2019
    Inventors: Mitsue TANAKA, Hidekazu KURIMOTO
  • Publication number: 20190031871
    Abstract: A rubber includes 5 parts by mass to 45 parts by mass of an uncross-linked EPM relative to 100 parts by mass of a cross-linked rubber polymer (other than EPM), and an oil in an amount equal to or more than the amount of the EPM. The rubber is foamed and has a specific gravity of more than 0.3 and 0.8 or less. A weather strip 1 and a hose 2 are formed of the rubber.
    Type: Application
    Filed: December 8, 2016
    Publication date: January 31, 2019
    Inventors: Naoyuki AKAHORI, Hidekazu KURIMOTO, Naoki IWASE
  • Patent number: 10047201
    Abstract: PP, an EPDM prior to crosslinking, and PE particles are fed into a twin screw extruder and melt-kneaded so that the EPDM is dynamically crosslinked, whereby a sliding material for weather strips formed of an olefin-based TPV in which the PE particles are dispersed is produced. The amount of the PE particles blended is 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM. It is preferable that the PE particles have an average particle diameter of 30 ?m to 200 ?m before the feeding, and are micronized by the melt kneading to have an average particle diameter of 10 ?m to 50 ?m in the produced sliding material for weather strips.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: August 14, 2018
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Atsuko Hirose, Yasuhiro Yamaguchi, Hidekazu Kurimoto
  • Patent number: 9909001
    Abstract: A rubber composition includes, as essential components, an EDPM polymer, a carbon black, an electrical insulating amorphous or spindle-shaped filler, a softener, and a sulfur-based vulcanizing agent as essential components, and also includes, as an optical component, an electrical insulating plate-shaped filler. An obtained vulcanized product is satisfied with the following Equations (1) and (2): volume resistivity ?1.0×106 ?·cm??(1) (M30<100° C.>/M30<23° C.>?1)×100??15%??(2) where M30<23° C.> is a tensile stress at elongation of 30% as measured by a tensile test at 23° C., and M30<100° C.> is a tensile stress at elongation of 30% as measured by a tensile test at 100° C.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 6, 2018
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Hidekazu Kurimoto, Hideyuki Imai, Masanori Kumazaki, Shinji Matsunaga
  • Patent number: 9809700
    Abstract: An air hose for an automobile, which has a two-layered structure of an inner tube made of an NBR composition and an outer cover made of a CSM composition, wherein the NBR composition satisfies (A) and (B) below: (A) an unvulcanized NBR in which an amount of AN is 30 to 50 and a Mooney viscosity (ML (1+4) 100° C.) is 50 to 90, is vulcanized in the presence of 0.5 to 7.0 parts by mass of a thiuram compound serving as a vulcanization accelerator, 0 to 2.5 parts by mass of 4,4?-dithio dimorpholine, and 2.0 to 7.0 parts by mass of a thiazole compound to 100 parts by mass of the unvulcanized NBR; and (B) 5 to 50 parts by mass of a plasticizer having a molecular weight of 700 to 2,000 is blended to 100 parts by mass of the unvulcanized NBR.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: November 7, 2017
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Akishige Seo, Hidekazu Kurimoto
  • Publication number: 20170044331
    Abstract: PP, an EPDM prior to crosslinking, and PE particles are fed into a twin screw extruder and melt-kneaded so that the EPDM is dynamically crosslinked, whereby a sliding material for weather strips formed of an olefin-based TPV in which the PE particles are dispersed is produced. The amount of the PE particles blended is 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM. It is preferable that the PE particles have an average particle diameter of 30 ?m to 200 ?m before the feeding, and are micronized by the melt kneading to have an average particle diameter of 10 ?m to 50 ?m in the produced sliding material for weather strips.
    Type: Application
    Filed: August 28, 2015
    Publication date: February 16, 2017
    Inventors: Atsuko HIROSE, Yasuhiro YAMAGUCHI, Hidekazu KURIMOTO
  • Publication number: 20170002183
    Abstract: An air hose for an automobile, which has a two-layered structure of an inner tube made of an NBR composition and an outer cover made of a CSM composition, wherein the NBR composition satisfies (A) and (B) below: (A) an unvulcanized NBR in which an amount of AN is 30 to 50 and a Mooney viscosity (ML (1+4) 100° C.) is 50 to 90, is vulcanized in the presence of 0.5 to 7.0 parts by mass of a thiuram compound serving as a vulcanization accelerator, 0 to 2.5 parts by mass of 4,4?-dithio dimorpholine, and 2.0 to 7.0 parts by mass of a thiazole compound to 100 parts by mass of the unvulcanized NBR; and (B) 5 to 50 parts by mass of a plasticizer having a molecular weight of 700 to 2,000 is blended to 100 parts by mass of the unvulcanized NBR.
    Type: Application
    Filed: June 10, 2015
    Publication date: January 5, 2017
    Inventors: Akishige SEO, Hidekazu KURIMOTO
  • Patent number: 9493628
    Abstract: The present invention relates to a rubber material containing an EPDM rubber composition containing an EPDM rubber, a carbon black, a softening agent, a vulcanizing agent and a sulfur compound, in which a blending amount of whole components from which the vulcanizing agent and the sulfur compound are excluded is from 300 to 400 parts by weight, and a total sulfur blending amount is from 1.0 to 2.8 parts by weight, in which a blending ratio of carbon black/softening agent is from 1.8 to 2.5, and in which the EPDM rubber composition has a Mooney viscosity of from 70 to 100 at 100° C., and a vulcanized composition thereof has a rate of rigidity change satisfying the following equation (1): {(30% Modulus at 100° C./30% modulus at 23° C.)?1}×100%??10%??(1).
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: November 15, 2016
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Hidekazu Kurimoto, Hiroshi Yamaguchi, Naomi Nakashima
  • Publication number: 20150275053
    Abstract: The present invention provides a rubber material including rubber polymer with which a low molecular weight hydrocarbon-based oil having a weight average molecular weight of 1500 or less and a high molecular weight hydrocarbon-based oil having a weight average molecular weight of 5000 or more are blended.
    Type: Application
    Filed: March 17, 2015
    Publication date: October 1, 2015
    Inventors: Naoki IWASE, Hidekazu KURIMOTO, Teruyoshi SUSAKI
  • Publication number: 20140371369
    Abstract: A rubber composition includes, as essential components, an EDPM polymer, a carbon black, an electrical insulating amorphous or spindle-shaped filler, a softener, and a sulfur-based vulcanizing agent as essential components, and also includes, as an optical component, an electrical insulating plate-shaped filler. An obtained vulcanized product is satisfied with the following Equations (1) and (2): volume resistivity?1.0×106 ?·cm??(1) (M30<100° C.>/M30<23° C.>?1)×100??15%??(2) where M30<23° C.> is a tensile stress at elongation of 30% as measured by a tensile test at 23° C., and M30<100° C.> is a tensile stress at elongation of 30% as measured by a tensile test at 100° C.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 18, 2014
    Inventors: Hidekazu KURIMOTO, Hideyuki IMAI, Masanori KUMAZAKI, Shinji MATSUNAGA
  • Patent number: 8828300
    Abstract: A die for manufacturing CVJ boot by injection molding includes a central core, and a plurality of divisional molds for molding an inner peripheral surface of the CVJ boot, respectively. The divisional molds move diametrically toward the central core. Moreover, the divisional molds not only approach one another diametrically, but also get away from each other axially.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: September 9, 2014
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Hidekazu Kurimoto, Takuya Ueno, Akira Maeda, Junya Miyazawa, Shinjiro Tomida