Patents by Inventor Kazuyoshi Kawasaki

Kazuyoshi Kawasaki 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: 20210403622
    Abstract: A fluoroelastomer composition containing (a) a polyol-crosslinkable fluoroelastomer, (b) a cross-linking agent for polyol crosslinking, (c) a crosslinking accelerator; and (d) at least one acid acceptor selected from basic magnesium carbonate and magnesium phosphate, wherein the content of a divalent metal oxide is lower than 1 part by mass with respect to 100 parts by mass of the fluoroelastomer (a). Also disclosed is a molded article obtained by crosslinking the fluoroelastomer composition.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 30, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Kazuyoshi KAWASAKI
  • Patent number: 11117992
    Abstract: The invention provides a fluoroelastomer composition capable of providing a molded article that is inexpensive and has excellent heat-aging resistance. The fluoroelastomer composition is a peroxide-crosslinkable fluoroelastomer composition containing a fluorine-containing elastomer that contains 25 to 90 mol % of a unit of vinylidene fluoride, 10 to 75 mol % of a unit of a fluorine-containing monomer other than the vinylidene fluoride, 0 to 10 mol % of a unit of a fluorine-free monomer copolymerizable with the vinylidene fluoride, and 0.1% by mass or less of an iodine atom and a bromine atom; an organic peroxide having a specific structure; and a co-crosslinking agent. The organic peroxide is present in an amount of 0.3 to 10 parts by mass relative to 100 parts by mass of the fluorine-containing elastomer.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: September 14, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Kazuyoshi Kawasaki
  • Patent number: 11054066
    Abstract: The present invention provides a hose excellent in mechanical properties at high temperatures. The hose of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: July 6, 2021
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei Terada, Daisuke Ota, Masanori Kitaichi, Yutaka Ueta, Shigeru Morita, Kazuyoshi Kawasaki, Tatsuya Morikawa, Satoshi Kawai, Shoji Fukuoka
  • Publication number: 20190248938
    Abstract: The invention provides a fluoroelastomer composition capable of providing a molded article that is inexpensive and has excellent heat-aging resistance. The fluoroelastomer composition is a peroxide-crosslinkable fluoroelastomer composition containing a fluorine-containing elastomer that contains 25 to 90 mol % of a unit of vinylidene fluoride, 10 to 75 mol % of a unit of a fluorine-containing monomer other than the vinylidene fluoride, 0 to 10 mol % of a unit of a fluorine-free monomer copolymerizable with the vinylidene fluoride, and 0.1% by mass or less of an iodine atom and a bromine atom; an organic peroxide having a specific structure; and a co-crosslinking agent. The organic peroxide is present in an amount of 0.3 to 10 parts by mass relative to 100 parts by mass of the fluorine-containing elastomer.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 15, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventor: Kazuyoshi KAWASAKI
  • Publication number: 20190055382
    Abstract: A fluororubber composition including a fluororubber, a silicone rubber, and perfluoropolyether. The fluororubber composition contains the silicone rubber in an amount of 5 to 55 parts by mass relative to 100 parts by mass of the fluororubber and the perfluoropolyether in an amount of 0.5 to 10 parts by mass relative to 100 parts by mass of the fluororubber.
    Type: Application
    Filed: February 17, 2017
    Publication date: February 21, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masanori KITAICHI, Michiko KITAGAWA, Yasuhiro SAKAMOTO, Hidekazu UEHATA, Yasushi NAKAMAE, Kazuyoshi KAWASAKI
  • 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: 9068653
    Abstract: To provide a sealing material which is excellent in sealability under high-temperature conditions as well as crack resistance at high temperatures and high compression. A sealing material comprising a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E? of 600 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, and frequency: 10 Hz.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: June 30, 2015
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei Terada, Daisuke Ota, Masanori Kitaichi, Yutaka Ueta, Shigeru Morita, Kazuyoshi Kawasaki, Tatsuya Morikawa, Shoji Fukuoka
  • Patent number: 8754161
    Abstract: The present invention provides a complex-shaped fluororubber formed product having excellent demoldability in molding. The complex-shaped fluororubber formed product of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: June 17, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Junpei Terada, Daisuke Ota, Masanori Kitaichi, Yutaka Ueta, Shigeru Morita, Kazuyoshi Kawasaki, Tatsuya Morikawa, Shoji Fukuoka
  • Patent number: 8609774
    Abstract: The present invention provides a belt excellent in mechanical properties at high temperatures. The belt of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: December 17, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Junpei Terada, Daisuke Ota, Masanori Kitaichi, Yutaka Ueta, Shigeru Morita, Kazuyoshi Kawasaki, Tatsuya Morikawa, Shoji Fukuoka
  • Patent number: 8420739
    Abstract: There is provided a fluorine-containing elastomer composition assuring easy kneading and providing a crosslinked article having improved strength. The fluorine-containing elastomer composition comprises (A) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a branching coefficient of 30 to 300 ppm, a Mooney viscosity (ML1+10: 121° C.) of 7 to 80 and a molecular weight distribution (Mw/Mn) of 1.5 to 4, and (B) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a storage modulus G? at 180° C. at 500 cpm of 500 to 900, and a mass ratio of (A)/(B) is 70/30 to 90/10.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: April 16, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Yosuke Nishimura, Shoji Fukuoka, Yasuko Takagahara, Masahiko Oka, Kazuyoshi Kawasaki, Mitsuru Kishine
  • Publication number: 20120095151
    Abstract: The present invention provides a complex-shaped fluororubber formed product having excellent demoldability in molding. The complex-shaped fluororubber formed product of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Application
    Filed: August 25, 2011
    Publication date: April 19, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei TERADA, Daisuke OTA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Shoji FUKUOKA
  • Publication number: 20120073696
    Abstract: The present invention provides a hose excellent in mechanical properties at high temperatures. The hose of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Application
    Filed: August 25, 2011
    Publication date: March 29, 2012
    Applicant: DAIKIN INDUSTRIES LTD.
    Inventors: Junpei TERADA, Daisuke OTA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Satoshi KAWAI, Shoji FUKUOKA
  • Publication number: 20120077924
    Abstract: To provide a fluororubber formed product having excellent heat resistance and excellent mechanical properties at high temperatures. A formed product comprising: a cross-linked fluororubber product obtained by cross-link-molding a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber product having a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of a measurement temperature of 160° C., tensile strain of 1%, initial force of 157 cN, and frequency of 10 Hz.
    Type: Application
    Filed: August 25, 2011
    Publication date: March 29, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke OTA, Junpei TERADA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Shoji FUKUOKA
  • Publication number: 20120077925
    Abstract: To provide a sealing material which is excellent in sealability under high-temperature conditions as well as crack resistance at high temperatures and high compression. A sealing material comprising a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the cross-linked fluororubber layer having a loss modulus E? of 600 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test under conditions of measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, and frequency: 10 Hz.
    Type: Application
    Filed: August 25, 2011
    Publication date: March 29, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei TERADA, Daisuke OTA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Shoji FUKUOKA
  • Publication number: 20120077939
    Abstract: The present invention provides a fluororubber formed product having excellent heat resistance and excellent mechanical properties at high temperatures. The formed product comprises a cross-linked fluororubber product obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B), the fluororubber (A) being a vinylidene fluoride fluororubber including 48 to 88 mol % of a structural unit derived from vinylidene fluoride and 0 to 10 mol % of a structural unit derived from tetrafluoroethylene relative to the total amount 100 mol % of structural units derived from all monomer components, the cross-linked fluororubber product having a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, and frequency: 10 Hz).
    Type: Application
    Filed: August 25, 2011
    Publication date: March 29, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke OTA, Junpei TERADA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Shoji FUKUOKA
  • Publication number: 20120077938
    Abstract: The present invention provides a vibration isolation rubber excellent not only in heat-aging resistance and oil resistance but also in mechanical properties at high temperatures. The vibration isolation rubber of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, and frequency: 10 Hz).
    Type: Application
    Filed: August 25, 2011
    Publication date: March 29, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei TERADA, Daisuke Ota, Masanori Kitaichi, Yutaka Ueta, Shigeru Morita, Kazuyoshi Kawasaki, Tatsuya Morikawa, Shoji Fukuoka
  • Publication number: 20120067706
    Abstract: The present invention provides a belt excellent in mechanical properties at high temperatures. The belt of the present invention comprises a cross-linked fluororubber layer obtainable by cross-linking a fluororubber composition containing a fluororubber (A) and a carbon black (B). The cross-linked fluororubber layer has a loss modulus E? of 400 kPa or higher and 6,000 kPa or lower determined by a dynamic viscoelasticity test (measurement temperature: 160° C., tensile strain: 1%, initial force: 157 cN, frequency: 10 Hz).
    Type: Application
    Filed: August 25, 2011
    Publication date: March 22, 2012
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Junpei TERADA, Daisuke OTA, Masanori KITAICHI, Yutaka UETA, Shigeru MORITA, Kazuyoshi KAWASAKI, Tatsuya MORIKAWA, Shoji FUKUOKA
  • Publication number: 20110184126
    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: Application
    Filed: September 7, 2009
    Publication date: July 28, 2011
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kohei Takemura, Tomihiko Yanagiguchi, Kazuyoshi Kawasaki
  • Publication number: 20110021690
    Abstract: There is provided a fluorine-containing elastomer composition assuring easy kneading and providing a crosslinked article having improved strength. The fluorine-containing elastomer composition comprises (A) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a branching coefficient of 30 to 300 ppm, a Mooney viscosity (ML1+10: 121° C.) of 7 to 80 and a molecular weight distribution (Mw/Mn) of 1.5 to 4, and (B) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a storage modulus G? at 180° C. at 500 cpm of 500 to 900, and a mass ratio of (A)/(B) is 70/30 to 90/10.
    Type: Application
    Filed: March 17, 2009
    Publication date: January 27, 2011
    Inventors: Yosuke Nishimura, Shoji Fukuoka, Yasuko Takagahara, Masahiko Oka, Kazuyoshi Kawasaki, Mitsuru Kishine
  • Patent number: 7772327
    Abstract: To provide a novel crosslinking system of fluorine-containing elastomer giving a crosslinked product particularly having improved mechanical strength and compression set at high temperature. A fluorine-containing rubber composition comprising a fluorine-containing elastomer having carboxyl group and/or alkoxycarbonyl group at an end of a trunk chain and/or branched chain as a crosslinkable group.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: August 10, 2010
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuyoshi Kawasaki, Masaki Irie, Katsuhiko Iseki, Tsuyoshi Itagaki, Tsuyoshi Noguchi, Takafumi Yamato, Mitsuru Kishine