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).
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Patent number: 11518831Abstract: To provide a method for producing a multicomponent copolymer with which a multicomponent copolymer having excellent rupture strength can be obtained, and a multicomponent copolymer, a rubber composition and a tire having excellent rupture strength. The method is a method for producing a multicomponent copolymer having a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, comprising adding a conjugated diene compound in divided portions into a reactor containing a catalyst and at least one selected from the group consisting of a non-conjugated olefin compound and an aromatic vinyl compound. The multicomponent copolymer is obtained with the production method. The rubber composition comprises the multicomponent copolymer as a rubber component. The tire uses the rubber composition.Type: GrantFiled: October 17, 2019Date of Patent: December 6, 2022Assignee: BRIDGESTONE CORPORATIONInventors: Shigenaga Takano, Aya Yanagisawa, Olivier Tardif, Yasuo Horikawa
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Patent number: 11142606Abstract: Provide is a polymer that can provide excellent toughness and weather resistance to a rubber composition and a rubber product such as a tire. The multicomponent copolymer contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, where a proportion of conjugated diene units bonded to a unit other than a conjugated diene unit out of the total conjugated diene units is 50% or more.Type: GrantFiled: November 13, 2017Date of Patent: October 12, 2021Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Olivier Tardif
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Patent number: 11059928Abstract: Provided is a multi-component copolymer comprising conjugated diene units, non-conjugated olefin units and aromatic vinyl units, wherein: a weight-average molecular weight of chain parts, divided by the conjugated diene units and each containing one or more of the non-conjugated olefin units and/or one or more of the aromatic vinyl units, is 50,000 or more. A rubber composition comprising the multi-component copolymer, a crosslinked rubber composition, and a rubber article comprising the crosslinked rubber composition are also provided.Type: GrantFiled: October 11, 2016Date of Patent: July 13, 2021Assignee: BRIDGESTONE CORPORATIONInventor: Yasuo Horikawa
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Patent number: 11021550Abstract: To provide a method for producing a multicomponent copolymer with which a multicomponent copolymer having excellent rupture strength can be obtained, and a multicomponent copolymer, a rubber composition and a tire having excellent rupture strength. The method is a method for producing a multicomponent copolymer having a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, comprising adding continuously or intermittently continuously a conjugated diene compound into a reactor containing a catalyst and at least one selected from the group consisting of a non-conjugated olefin compound and an aromatic vinyl compound. The multicomponent copolymer is obtained with the production method. The rubber composition comprises the multicomponent copolymer as a rubber component. The tire uses the rubber composition.Type: GrantFiled: April 16, 2018Date of Patent: June 1, 2021Assignee: BRIDGESTONE CORPORATIONInventors: Shigenaga Takano, Aya Yanagisawa, Olivier Tardif, Yasuo Horikawa
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Patent number: 11021595Abstract: An object of the present invention is to provide a multicomponent copolymer for use for producing a crosslinked rubber composition and a rubber product excellent in fracture performance (strength and elongation) at high temperatures while maintaining high weather resistance. Further, the invention provides a rubber composition containing the multicomponent copolymer, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a rubber product and a tire using the rubber composition or the crosslinked rubber composition. The multicomponent copolymer of the invention contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, wherein the main chain is formed of an acyclic structure alone, the content of the aromatic vinyl unit is 3 mol % or more of the whole multicomponent copolymer, and the content of the non-conjugated olefin unit is more than 44 mol % and less than 97 mol % of the whole multicomponent copolymer.Type: GrantFiled: October 14, 2016Date of Patent: June 1, 2021Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Olivier Tardif, Yamato Ono
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Publication number: 20210087368Abstract: The antivibration rubber composition of the present invention contains a styrene-butadiene rubber (A) having a polystyrene-equivalent weight-average molecular weight of 700,000 or more, and a liquid styrene-butadiene rubber (B) having a polystyrene-equivalent weight-average molecular weight of 12,000 or less, wherein the total amount of the vinyl bond content in the rubber (A) and the vinyl bond content in the liquid rubber (B) relative to the total amount of the rubber (A) and the liquid rubber (B) is 25% by mass or more. The antivibration rubber using the composition exhibits ultra-low spring property and high durability.Type: ApplicationFiled: December 11, 2018Publication date: March 25, 2021Applicant: BRIDGESTONE CORPORATIONInventors: Nahoko ITO, Yasuo HORIKAWA, Kei KIMURA, Kazutaka OTSU
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Publication number: 20200239675Abstract: A multicomponent copolymer according to the present invention contains a non-conjugated polyene unit, a non-conjugated olefin unit and an aromatic vinyl unit, wherein the content of the aromatic vinyl unit is 5% by mass or more and less than 30% by mass. A crosslinked rubber composition having a high strength, as compared with the case where EPDM is used, while having high weather resistance, a multicomponent copolymer useful for producing a rubber product, and a method for producing the multicomponent copolymer are provided.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Olivier TARDIF, Yasuo HORIKAWA
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Publication number: 20200140576Abstract: To provide a method for producing a multicomponent copolymer with which a multicomponent copolymer having excellent rupture strength can be obtained, and a multicomponent copolymer, a rubber composition and a tire having excellent rupture strength. The method is a method for producing a multicomponent copolymer having a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, comprising adding continuously or intermittently continuously a conjugated diene compound into a reactor containing a catalyst and at least one selected from the group consisting of a non-conjugated olefin compound and an aromatic vinyl compound. The multicomponent copolymer is obtained with the production method. The rubber composition comprises the multicomponent copolymer as a rubber component. The tire uses the rubber composition.Type: ApplicationFiled: April 16, 2018Publication date: May 7, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Shigenaga TAKANO, Aya YANAGISAWA, Olivier TARDIF, Yasuo HORIKAWA
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Publication number: 20200048380Abstract: To provide a method for producing a multicomponent copolymer with which a multicomponent copolymer having excellent rupture strength can be obtained, and a multicomponent copolymer, a rubber composition and a tire having excellent rupture strength. The method is a method for producing a multicomponent copolymer having a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, comprising adding a conjugated diene compound in divided portions into a reactor containing a catalyst and at least one selected from the group consisting of a non-conjugated olefin compound and an aromatic vinyl compound. The multicomponent copolymer is obtained with the production method. The rubber composition comprises the multicomponent copolymer as a rubber component. The tire uses the rubber composition.Type: ApplicationFiled: October 17, 2019Publication date: February 13, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Shigenaga TAKANO, Aya Yanagisawa, Olivier Tardif, Yasuo Horikawa
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Patent number: 10538649Abstract: Provided is a multi-component copolymer comprising conjugated diene units, non-conjugated olefin units and aromatic vinyl units, wherein: a peak top molecular weight of chain parts, divided by the conjugated diene units and each containing one or more of the non-conjugated olefin units and/or one or more of the aromatic vinyl units, is 1,000 or more and less than 40,000. A rubber composition comprising the multi-component copolymer, a crosslinked rubber composition, and a rubber article comprising the crosslinked rubber composition are also provided.Type: GrantFiled: October 11, 2016Date of Patent: January 21, 2020Assignee: BRIDGESTONE CORPORATIONInventor: Yasuo Horikawa
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Publication number: 20190367654Abstract: Provide is a polymer that can provide excellent toughness and weather resistance to a rubber composition and a rubber product such as a tire. The multicomponent copolymer contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, where a proportion of conjugated diene units bonded to a unit other than a conjugated diene unit out of the total conjugated diene units is 50% or more.Type: ApplicationFiled: November 13, 2017Publication date: December 5, 2019Applicant: BRIDGESTONE CORPORATIONInventors: Yasuo HORIKAWA, Olivier TARDIF
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Publication number: 20180298167Abstract: Provided is a multi-component copolymer comprising conjugated diene units, non-conjugated olefin units and aromatic vinyl units, wherein: a peak top molecular weight of chain parts, divided by the conjugated diene units and each containing one or more of the non-conjugated olefin units and/or one or more of the aromatic vinyl units, is 1,000 or more and less than 40,000. A rubber composition comprising the multi-component copolymer, a crosslinked rubber composition, and a rubber article comprising the crosslinked rubber composition are also provided.Type: ApplicationFiled: October 11, 2016Publication date: October 18, 2018Applicant: BRIDGESTONE CORPORATIONInventor: Yasuo HORIKAWA
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Publication number: 20180291185Abstract: An object of the present invention is to provide a multicomponent copolymer for use for producing a crosslinked rubber composition and a rubber product excellent in fracture performance (strength and elongation) at high temperatures while maintaining high weather resistance. Further, the invention provides a rubber composition containing the multicomponent copolymer, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a rubber product and a tire using the rubber composition or the crosslinked rubber composition. The multicomponent copolymer of the invention contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, wherein the main chain is formed of an acyclic structure alone, the content of the aromatic vinyl unit is 3 mol % or more of the whole multicomponent copolymer, and the content of the non-conjugated olefin unit is more than 44 mol % and less than 97 mol % of the whole multicomponent copolymer.Type: ApplicationFiled: October 14, 2016Publication date: October 11, 2018Applicant: BRIDGESTONE CORPORATIONInventors: Yasuo HORIKAWA, Olivier TARDIF, Yamato ONO
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Publication number: 20180282456Abstract: Provided is a multi-component copolymer comprising conjugated diene units, non-conjugated olefin units and aromatic vinyl units, wherein: a weight-average molecular weight of chain parts, divided by the conjugated diene units and each containing one or more of the non-conjugated olefin units and/or one or more of the aromatic vinyl units, is 50,000 or more. A rubber composition comprising the multi-component copolymer, a crosslinked rubber composition, and a rubber article comprising the crosslinked rubber composition are also provided.Type: ApplicationFiled: October 11, 2016Publication date: October 4, 2018Applicant: BRIDGESTONE CORPORATIONInventor: Yasuo HORIKAWA
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Patent number: 9701776Abstract: 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: GrantFiled: February 3, 2012Date of Patent: July 11, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
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Patent number: 9670302Abstract: Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a tapered copolymer including: at least one of a block sequence including monomer units of the conjugated diene compound and a block sequence including monomer units of the non-conjugated olefin; and a random sequence including randomly arranged monomer units of the conjugated diene compound and monomer units of the non-conjugated olefin.Type: GrantFiled: July 26, 2011Date of Patent: June 6, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita
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Publication number: 20170073450Abstract: A multiblock copolymer, obtainable by copolymerization of a conjugated diene compound and a non-conjugated olefin, is characterized in that: a structure of the multiblock copolymer includes A-(B-A)x and/or B-(A-B)x, wherein “A” represents a block portion constituted of monomer units of a non-conjugated olefin, “B” represents a block portion constituted of monomer units of a conjugated diene compound, and “x” represents an integer ?1; content of the non-conjugated olefin portion is 50 mol %; 0 mol % <crystal content of the non-conjugated olefin portion 20 mol %; and 0% <degree of crystallinity of the non-conjugated olefin portion 40%. Vulcanized rubber having high fracture resistance and high crack resistance (thus a rubber composition and a tire each using the vulcanized rubber and having such excellent physical properties) can be manufactured from the multiblock polymer.Type: ApplicationFiled: February 24, 2015Publication date: March 16, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Madoka KIMURA, Yasuo HORIKAWA, Olivier TARDIF
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Patent number: 9346907Abstract: 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: GrantFiled: August 28, 2014Date of Patent: May 24, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa
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Patent number: 9212274Abstract: 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: GrantFiled: February 27, 2012Date of Patent: December 15, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Junko Matsushita, Yasuo Horikawa, Shojiro Kaita, Olivier Tardif
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Patent number: 9181376Abstract: 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: GrantFiled: July 26, 2011Date of Patent: November 10, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Yasuo Horikawa, Shojiro Kaita, Olivier Tardif, Junko Matsushita