Patents by Inventor Tomihiko Yanagiguchi

Tomihiko Yanagiguchi 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: 9873781
    Abstract: The present invention aims to provide an acrylic rubber composition capable of giving an acrylic rubber molded product good in low-friction properties and non-sticking properties. The present invention relates to an acrylic rubber composition containing an acrylic rubber (A) and a fluororesin (B), the fluororesin (B) being a perfluororesin.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: January 23, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomihiko Yanagiguchi, Yasuhiro Nakano, Haruhisa Masuda, Takahiro Kitahara
  • Patent number: 9809008
    Abstract: A laminate of a rubber layer (A) and a fluororesin layer (B) on the rubber layer (A), wherein the rubber layer (A) is a layer made of a rubber composition for vulcanization, the rubber composition for vulcanization contains an unvulcanized rubber (a1); at least one compound (a2) selected from the group consisting of a 1,8-diazabicyclo(5.4.0)undec-7-ene salt, a 1,5-diazabicyclo(4.3.0)-non-5-ene salt, 1,8-diazabicyclo(5.4.0)undec-7-ene, and 1,5-diazabicyclo(4.3.0)-non-5-ene; magnesium oxide (a3); and silica (a4), the amount of the compound (a2) is larger than 1.0 part by mass and not larger than 5.0 parts by mass, for each 100 parts by mass of the unvulcanized rubber (a1), the fluororesin layer (B) is a layer made of a fluoropolymer composition, and the fluoropolymer composition contains a fluoropolymer (b1) having a copolymer unit derived from chlorotrifluoroethylene.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: November 7, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiaki Masui, Tomihiko Yanagiguchi, Mayuko Taeda, Takeshi Inaba
  • Patent number: 9663638
    Abstract: An object of the present invention is to provide an acrylonitrile-butadiene rubber composition that can provide an acrylonitrile-butadiene rubber molded article having excellent properties of non-stickiness, oil resistance, heat resistance, and low-friction properties. The acrylonitrile-butadiene rubber composition of the present invention includes: an acrylonitrile-butadiene rubber (A); and a fluororesin (B), the fluororesin (B) being a perhalopolymer, the composition formed from a co-coagulated composition obtainable by co-coagulating the acrylonitrile-butadiene rubber (A) and the fluororesin (B).
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: May 30, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomihiko Yanagiguchi, Haruhisa Masuda
  • Patent number: 9416234
    Abstract: There is provided a crosslinkable fluorine-containing rubber composition being capable of giving a fluorine-containing rubber crosslinked and molded article having a low friction coefficient and assuring an increased proportion of a fluorine-containing resin around the surface of a fluorine-containing rubber, a molded article obtained by crosslinking the composition, and a method for producing the molded article. The crosslinkable fluorine-containing rubber composition comprises a fluorine-containing rubber (A) comprising vinylidene fluoride unit, a fluorine-containing resin (B) and a polyol crosslinking agent (C), wherein the fluorine-containing rubber (A) and the fluorine-containing resin (B) are kneaded at a temperature of not less than a temperature being lower by 5° C. than the melting point of the fluorine-containing resin (B).
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: August 16, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kohei Takemura, Tomihiko Yanagiguchi, Kazuyoshi Kawasaki
  • Patent number: 9322476
    Abstract: The present invention provides a vehicle engine oil seal having excellent sliding properties over the entire rotation range of engines from a low rotation range to a high rotation range. The present invention is a vehicle engine oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: April 26, 2016
    Assignees: HONDA MOTOR CO., LTD., DAIKIN INDUSTRIES, LTD.
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Patent number: 9322477
    Abstract: The present invention provides a vehicle transmission having excellent sliding properties over the entire speed range of engines from a low speed range to a high speed range. The present invention is a vehicle transmission oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: April 26, 2016
    Assignees: HONDA MOTOR CO., LTD., DAIKIN INDUSTRIES, LTD.
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20160002447
    Abstract: An object of the present invention is to provide an acrylonitrile-butadiene rubber composition that can provide an acrylonitrile-butadiene rubber molded article having excellent properties of non-stickiness, oil resistance, heat resistance, and low-friction properties. The acrylonitrile-butadiene rubber composition of the present invention includes: an acrylonitrile-butadiene rubber (A); and a fluororesin (B), the fluororesin (B) being a perhalopolymer, the composition formed from a co-coagulated composition obtainable by co-coagulating the acrylonitrile-butadiene rubber (A) and the fluororesin (B).
    Type: Application
    Filed: February 28, 2014
    Publication date: January 7, 2016
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomihiko YANAGIGUCHI, Haruhisa MASUDA
  • Patent number: 9102817
    Abstract: A crosslinkable fluororubber composition containing: a fluororubber (A); and a fluororesin (B), wherein the fluororesin (B) is a copolymer (B1) consisting of tetrafluoroethylene units (a) and hexafluoropropylene units (b) or a copolymer (B2) containing tetrafluoroethylene units (a), hexafluoropropylene units (b), and polymerized units (c) derived from a monomer copolymerizable with tetrafluoroethylene and hexafluoropropylene, the copolymer (B1) satisfies the condition that the ratio (a)/(b) is (80.0 to 87.3)/(12.7 to 20.0) on a molar basis, and the copolymer (B2) satisfies the condition that the ratio (a)/(b) is (80.0 to 90.0)/(10.0 to 20.0) on a molar basis, and the ratio (c)/{(a)+(b)} is (0.1 to 10.0)/(90.0 to 99.9) on a molar basis.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: August 11, 2015
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasuhiro Nakano, Tomihiko Yanagiguchi, Takahiro Kitahara
  • Publication number: 20150041473
    Abstract: The object of the present invention is to provide an automotive filler cap with excellent low adhesion property. The present invention relates to an automotive filler cap configured to be attached to a filler opening of an automobile, the automotive filler cap including a gasket configured to seal the filler opening by being pressed against the filler opening, the gasket being made of a composition that contains a fluororubber and a fluororesin, the fluororesin being precipitated on the surface of the gasket, the fluororesin comprising a copolymer that contains a polymerized unit based on tetrafluoroethylene and a polymerized unit based on hexafluoropropylene.
    Type: Application
    Filed: February 25, 2013
    Publication date: February 12, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomihiko Yanagiguchi, Yasuhiro Nakano, Haruhisa Masuda, Takahiro Kitahara
  • Publication number: 20150014941
    Abstract: An oil seal for automobiles including an elastic component having a seal lip portion. The elastic component consists of a composition containing fluororubber and fluororesin. The seal lip portion has protrusions at least on the surface thereof. The protrusions substantially consist of the fluororesin contained in the composition. The fluororesin is a copolymer containing a polymerized unit based on tetrafluoroethylene and a polymerized unit based on hexafluoropropylene.
    Type: Application
    Filed: January 16, 2013
    Publication date: January 15, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomihiko Yanagiguchi, Haruhisa Masuda, Yasuhiro Nakano, Takahiro Kitahara
  • Patent number: 8931452
    Abstract: The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: January 13, 2015
    Assignees: Honda Motor Co., Ltd., Daikin Industries, Ltd.
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20140378616
    Abstract: A crosslinkable fluororubber composition containing: a fluororubber (A); and a fluororesin (B), wherein the fluororesin (B) is a copolymer (B1) consisting of tetrafluoroethylene units (a) and hexafluoropropylene units (b) or a copolymer (B2) containing tetrafluoroethylene units (a), hexafluoropropylene units (b), and polymerized units (c) derived from a monomer copolymerizable with tetrafluoroethylene and hexafluoropropylene, the copolymer (B1) satisfies the condition that the ratio (a)/(b) is (80.0 to 87.3)/(12.7 to 20.0) on a molar basis, and the copolymer (B2) satisfies the condition that the ratio (a)/(b) is (80.0 to 90.0)/(10.0 to 20.0) on a molar basis, and the ratio (c)/{(a)+(b)} is (0.1 to 10.0)/(90.0 to 99.9) on a molar basis.
    Type: Application
    Filed: August 6, 2012
    Publication date: December 25, 2014
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasuhiro Nakano, Tomihiko Yanagiguchi, Takahiro Kitahara
  • Patent number: 8796384
    Abstract: Provided is a cross-linkable fluororubber composition capable of giving a fluororubber cross-linked molded article that has excellent mechanical strength and low friction properties. The cross-linkable fluororubber composition includes a coagulum obtained by co-coagulating a fluororubber (A) and a fluororesin (B).
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: August 5, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20130280490
    Abstract: A fluororubber molded article produced by crosslinking a crosslinkable composition containing a fluororubber (A) and a fluororesin (B), wherein the fluororubber molded article has a surface with projecting portions, an area ratio of areas having the projecting portions to the entire surface of the fluororubber molded article is not less than 0.06, a volume ratio of the fluororesin (B) to the fluororubber molded article is 0.05 to 0.45, the area ratio of the areas having the projecting portions is 1.2 times or more larger than the volume ratio of the fluororesin (B), and the fluororesin (B) is a tetrafluoroethylene/hexafluoropropylene copolymer.
    Type: Application
    Filed: December 27, 2011
    Publication date: October 24, 2013
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20120325175
    Abstract: The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Application
    Filed: March 4, 2011
    Publication date: December 27, 2012
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20120299251
    Abstract: The present invention provides a vehicle transmission having excellent sliding properties over the entire speed range of engines from a low speed range to a high speed range. The present invention is a vehicle transmission oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Application
    Filed: March 4, 2011
    Publication date: November 29, 2012
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20120286479
    Abstract: The present invention provides a vehicle engine oil seal having excellent sliding properties over the entire rotation range of engines from a low rotation range to a high rotation range. The present invention is a vehicle engine oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.
    Type: Application
    Filed: March 4, 2011
    Publication date: November 15, 2012
    Applicants: DAIKIN INDUSTRIES, LTD., HONDA MOTOR CO., LTD.
    Inventors: Hidetaka Ogishi, Tetsuya Mizone, Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20120231196
    Abstract: The present invention provides a laminated article having improved adhesion of the fluorine-containing resin layer to the elastomer layer. The laminated article comprises a fluorine-containing resin layer (a) formed using a fluorine-containing resin having a carbonyl group, an olefin group or an amino group at an end of a polymer trunk chain or an end of a polymer side chain, and an elastomer layer (b) formed using an elastomer composition.
    Type: Application
    Filed: May 24, 2012
    Publication date: September 13, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiki ICHISAKA, Michiko DOI, Haruhisa MASUDA, Katsuhide OHTANI, Tomihiko YANAGIGUCHI, Tsuyoshi ONO, Tomohiro KINO, Tadahiro YABU
  • Publication number: 20120108753
    Abstract: Provided is a cross-linkable fluororubber composition capable of giving a fluororubber cross-linked molded article that has excellent mechanical strength and low friction properties. The cross-linkable fluororubber composition includes a coagulum obtained by co-coagulating a fluororubber (A) and a fluororesin (B).
    Type: Application
    Filed: July 2, 2010
    Publication date: May 3, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kouhei Takemura, Tomihiko Yanagiguchi
  • Publication number: 20120107617
    Abstract: The present invention provides a vulcanized laminate in which a rubber layer and a fluororesin layer are firmly adhered to each other without using an adhesive or performing a surface treatment on the rubber layer and the fluororesin layer. The present invention relates to a laminate comprising a rubber layer (A) and a fluororesin layer (B) on the rubber layer (A), wherein the rubber layer (A) is a layer made of a rubber composition for vulcanization, the rubber composition for vulcanization contains an unvulcanized rubber (a1); at least one compound (a2) selected from the group consisting of a 1,8-diazabicyclo(5.4.0)undec-7-ene salt, a 1,5-diazabicyclo(4.3.0)-non-5-ene salt, 1,8-diazabicyclo(5.4.0)undec-7-ene, and 1,5-diazabicyclo(4.3.0)-non-5-ene; magnesium oxide (a3); and silica (a4), the amount of the compound (a2) is larger than 1.0 part by mass and not larger than 5.
    Type: Application
    Filed: May 19, 2010
    Publication date: May 3, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiaki Masui, Tomihiko Yanagiguchi, Mayuko Taeda, Takeshi Inaba