Patents by Inventor Yasuo Horikawa

Yasuo Horikawa 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: 9346907
    Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: May 24, 2016
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa
  • Patent number: 9212274
    Abstract: The present invention provides a rubber composition that is used for manufacturing a rubber excellent in weather resistance, fracture resistance and crack growth resistance, and that contains a conjugated diene compound/non-conjugated olefin copolymer, a conjugate diene-based polymer and a non-conjugated diene compound/non-conjugated olefin copolymer, a rubber composition for tire side use using the rubber composition for tire sidewall members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire. The rubber composition includes: (A) a conjugated diene compound/non-conjugated olefin copolymer containing a conjugated diene compound-derived unit by at least 40 mol %; (B) a conjugated diene-based polymer; and (C) a non-conjugated diene compound/non-conjugated olefin copolymer containing an ethylene-propylene-diene rubber.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: December 15, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Junko Matsushita, Yasuo Horikawa, Shojiro Kaita, Olivier Tardif
  • Patent number: 9181376
    Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a block copolymer, the conjugated diene compound unit having 1,2 adduct (including 3,4 adduct) content of 5% or less or the conjugated diene compound unit having a cis-1,4 bond content of more than 92%, in which preferred examples of the conjugated diene compound include 1,3-butadiene and isoprene, and preferred examples of the non-conjugated olefin include ethylene, propylene, and 1-butene.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: November 10, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Patent number: 9139680
    Abstract: Provided is a block copolymer of a conjugated diene compound and a non-conjugated olefin, a rubber composition including the block copolymer, a crosslinked rubber obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. The copolymer of the present invention is a block copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer having a peak area in a temperature range in a range of 70° C. to 110° C. that accounts for at least 60% of a peak area in a range of 40° C. to 140° C. and a peak area in a range of 110° C. to 140° C. that accounts for 20% or less of a peak area in a range of 40° C. to 140° C., the peak areas being measured by the differential scanning calorimetry (DSC) according to JIS K 7121-1987.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: September 22, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Patent number: 9074035
    Abstract: In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5% and the non-conjugated olefin is contained in an amount of 10 mol % or more.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: July 7, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
  • Patent number: 9056936
    Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a random copolymer including randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, in which the non-conjugated olefin is preferably an acyclic olefin, the non-conjugated olefin preferably has 2 to 10 carbon atoms, and specific examples of the non-conjugated olefin preferably include ethylene, propylene, and 1-butene.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: June 16, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Patent number: 8987347
    Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin that is used for manufacturing a rubber excellent in crack growth resistance, heat resistance and ozone resistance and that includes a cis-1,4 bond at a unit derived from the conjugated diene compound, a rubber composition containing the copolymer, a rubber composition for tire treads using the rubber composition for tire tread members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. In the copolymer of a conjugated diene compound and a non-conjugated olefin, the cis-1,4 bond content of a unit derived from the conjugated diene compound is more than 92%.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: March 24, 2015
    Assignee: Bridgestone Corporation
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Patent number: 8962743
    Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin, in which the conjugated diene unit has cis-1,4 bonds and the non-conjugated olefin contains many ethylene structures. In a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound, the conjugated diene unit has a cis-1,4 bond content of 50% or more and the unconjugated olefin is contained in an amount of 20 mol % or more.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: February 24, 2015
    Assignee: Bridgestone Corporation
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
  • Patent number: 8962744
    Abstract: The present invention provides a random copolymer that is used for manufacturing a tire having excellent rollability and wear resistance and that includes randomly arranged monomer units of a conjugated diene compound and of a non-conjugated olefin, a rubber composition containing the random copolymer, a cross-linked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the cross-linked rubber composition. A copolymer of a conjugated diene compound and a non-conjugated olefin, including a random copolymer having randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, and containing, by more than 30 mol %, a unit derived from the conjugated diene compound.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: February 24, 2015
    Assignee: Bridgestone Corporation
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20140371408
    Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.
    Type: Application
    Filed: August 28, 2014
    Publication date: December 18, 2014
    Inventors: Shojiro KAITA, Olivier TARDIF, Yasuo HORIKAWA
  • Patent number: 8853339
    Abstract: This invention relates to a method for producing a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound having a high cis-1,4 bond content of a conjugated diene compound portion, and more particularly to a method for producing a copolymer characterized by comprising a step of polymerizing a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition including at least one complex selected from a metallocene complex represented by the following general formula (I): (wherein M is a lanthanoid element, scandium or yttrium, and CpR is independently a non-substituted or substituted indenyl, and Ra-Rf are independently an alkyl group having a carbon number of 1-3 or a hydrogen atom, and L is a neutral Lewis base, and w is an integer of 0-3) and so on.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: October 7, 2014
    Assignee: Bridgestone Corporation
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa
  • Publication number: 20140179861
    Abstract: Provided is a block copolymer of a conjugated diene compound and a non-conjugated olefin, a rubber composition including the block copolymer, a crosslinked rubber obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. The copolymer of the present invention is a block copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer having a peak area in a temperature range in a range of 70° C. to 110° C. that accounts for at least 60% of a peak area in a range of 40° C. to 140° C. and a peak area in a range of 110° C. to 140° C. that accounts for 20% or less of a peak area in a range of 40° C. to 140° C., the peak areas being measured by the differential scanning calorimetry (DSC) according to JIS K 7121-1987.
    Type: Application
    Filed: May 29, 2012
    Publication date: June 26, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20140018493
    Abstract: The present invention provides a random copolymer that is used for manufacturing a tire having excellent rollability and wear resistance and that includes randomly arranged monomer units of a conjugated diene compound and of a non-conjugated olefin, a rubber composition containing the random copolymer, a cross-linked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the cross-linked rubber composition. A copolymer of a conjugated diene compound and a non-conjugated olefin, including a random copolymer having randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, and containing, by more than 30 mol %, a unit derived from the conjugated diene compound.
    Type: Application
    Filed: February 2, 2012
    Publication date: January 16, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20140005327
    Abstract: The present invention provides a random copolymer that is used for manufacturing a rubber having high fracture strength and excellent low loss properties (low heat generation properties) and that includes randomly arranged monomer units of a conjugated diene compound and of a non-conjugated olefin, a rubber composition containing the random copolymer, a cross-linked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the cross-linked rubber composition. A copolymer of a conjugated diene compound and a non-conjugated olefin includes a random copolymer having randomly arranged monomer units of the conjugated diene compound and of the non-conjugated olefin, which random copolymer contains, by at least 5 mol %, alternate bonding units of the conjugated diene compound and the non-conjugated olefin in a unit derived from the non-conjugated olefin.
    Type: Application
    Filed: February 3, 2012
    Publication date: January 2, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20140005321
    Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin that is used for manufacturing rubber excellent in low heat generation properties, heat resistance, ozone resistance (weather resistance), a rubber composition containing the copolymer, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire manufactured by using the rubber composition or the crosslinked rubber composition. In the copolymer of a conjugated diene compound and a non-conjugated olefin, the content of 1,2 adduct units (including 3,4 adduct units) of a unit derived from the conjugated diene compound is 5% or less.
    Type: Application
    Filed: February 2, 2012
    Publication date: January 2, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20140005296
    Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin that is used for manufacturing a rubber excellent in crack growth resistance, heat resistance and ozone resistance and that includes a cis-1,4 bond at a unit derived from the conjugated diene compound, a rubber composition containing the copolymer, a rubber composition for tire treads using the rubber composition for tire tread members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire using the rubber composition or the crosslinked rubber composition. In the copolymer of a conjugated diene compound and a non-conjugated olefin, the cis-1,4 bond content of a unit derived from the conjugated diene compound is more than 92%.
    Type: Application
    Filed: February 1, 2012
    Publication date: January 2, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20130324660
    Abstract: The present invention provides a rubber composition that is used for manufacturing a rubber excellent in weather resistance, fracture resistance and crack growth resistance, and that contains a conjugated diene compound/non-conjugated olefin copolymer, a conjugate diene-based polymer and a non-conjugated diene compound/non-conjugated olefin copolymer, a rubber composition for tire side use using the rubber composition for tire sidewall members, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a tire. The rubber composition includes: (A) a conjugated diene compound/non-conjugated olefin copolymer containing a conjugated diene compound-derived unit by at least 40 mol %; (B) a conjugated diene-based polymer; and (C) a non-conjugated diene compound/non-conjugated olefin copolymer containing an ethylene-propylene-diene rubber.
    Type: Application
    Filed: February 27, 2012
    Publication date: December 5, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Junko Matsushita, Yasuo Horikawa, Shojiro Kaita, Olivier Tardif
  • Publication number: 20130210994
    Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin, in which the conjugated diene unit has cis-1,4 bonds and the non-conjugated olefin contains many ethylene structures. In a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound, the conjugated diene unit has a cis-1,4 bond content of 50% or more and the unconjugated olefin is contained in an amount of 20 mol % or more.
    Type: Application
    Filed: July 27, 2011
    Publication date: August 15, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
  • Publication number: 20130211010
    Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a block copolymer, the conjugated diene compound unit having 1,2 adduct (including 3,4 adduct) content of 5% or less or the conjugated diene compound unit having a cis-1,4 bond content of more than 92%, in which preferred examples of the conjugated diene compound include 1,3-butadiene and isopropylene, and preferred examples of the non-conjugated olefin include ethylene, propylene, and 1-butene.
    Type: Application
    Filed: July 26, 2011
    Publication date: August 15, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
  • Publication number: 20130197157
    Abstract: In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5% and the non-conjugated olefin is contained in an amount of 10 mol % or more.
    Type: Application
    Filed: July 26, 2011
    Publication date: August 1, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano