Patents by Inventor Yu Shinke

Yu Shinke 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: 11608425
    Abstract: A rubber composition for a tire contains a diene rubber, silica, and a specific modified butadiene polymer, wherein the diene rubber contains an aromatic vinyl-conjugated diene rubber A and at least one rubber component B selected from an aromatic vinyl-conjugated diene rubber b1 other than the rubber A and a butadiene rubber b2 having a weight average molecular weight of ?15000. A content of the aromatic vinyl-conjugated diene rubber A is from 30 to 90% by mass, and a content of the rubber component B is from 10 to 70% by mass, an average TG of the diene rubber is lower than ?20° C., a content of the silica is from 80 to 200 parts by mass per 100 parts by mass of the diene rubber, and a content of the modified butadiene polymer is from 1.0 to 25.0% by mass with respect to content of the silica.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: March 21, 2023
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Ayaki Kazariya, Makoto Ashiura, Satoshi Mihara, Kazuya Uenishi, Yu Shinke
  • Patent number: 11518835
    Abstract: An object of the present invention is to provide a conveyor belt rubber composition having excellent wear resistance and gouging resistance, a method for producing the conveyor belt rubber composition, a conveyor belt formed using the conveyor belt rubber composition, and a belt conveyor equipped with the conveyor belt. The present invention relates to a conveyor belt rubber composition containing a diene rubber containing less than 50 mass % of an aromatic vinyl-conjugated diene copolymer, wherein the aromatic vinyl-conjugated diene copolymer has a content of repeating units derived from an aromatic vinyl of 20 mass % or less, and a proportion of a vinyl structure in repeating units derived from a conjugated diene of 8 mol % or less.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: December 6, 2022
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yu Shinke, Deqing Zou, Jun Miyaji, Kazuya Uenishi
  • Patent number: 11505623
    Abstract: The present invention provides a compounding agent which, when used in a rubber composition containing a reinforcing filler, exhibits excellent dispersibility, workability, toughness, low heat build-up, and wear resistance; and a rubber composition containing the compounding agent. A modified butadiene polymer of the present invention has a functional group containing a nitrogen atom and silicon atom at a terminal, a weight average molecular weight of the modified butadiene polymer being from 1000 to 15000, and a molecular weight distribution of the modified butadiene polymer being 2.0 or less.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: November 22, 2022
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yu Shinke, Kazuya Uenishi
  • Patent number: 11498993
    Abstract: An object of the present invention is to provide a conveyor belt rubber composition having excellent cut resistance and wear resistance, a method for producing the conveyor belt rubber composition, a conveyor belt formed using the conveyor belt rubber composition, and a belt conveyor equipped with the conveyor belt. The present invention relates to a conveyor belt rubber composition containing a diene rubber containing 50 mass % or more of an aromatic vinyl-conjugated diene copolymer, wherein the aromatic vinyl-conjugated diene copolymer has a content of repeating units derived from an aromatic vinyl of more than 20 mass %, and a proportion of a vinyl structure in repeating units derived from a conjugated diene of 8 mol % or less.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: November 15, 2022
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yu Shinke, Deqing Zou, Jun Miyaji, Kazuya Uenishi
  • Publication number: 20210246246
    Abstract: An object of the present invention is to provide a method of producing a copolymer that produces an aromatic vinyl-diene copolymer having a low glass transition temperature, and a method of producing a rubber composition using the method. The subject method produces an aromatic vinyl-diene copolymer having a content of repeating units derived from an aromatic vinyl in an amount of 18 mass % or greater, and among repeating units derived from a diene, a proportion of a vinyl structure of 8 mol % or less, a proportion of a 1,4-trans structure of 60 mol % or less, and a proportion of a 1,4-cis structure from 40 to 95 mol %, the method including copolymerizing a monomer containing an aromatic vinyl and a diene using an initiator prepared with an organolithium compound, an alkylaluminum, a metal alcoholate, and at least one polar compound selected from the group consisting of water and an alcohol.
    Type: Application
    Filed: August 22, 2019
    Publication date: August 12, 2021
    Inventors: Kazuya UENISHI, Yu SHINKE, Yoshihiro KAMEDA, Masaki SATO, Ayaki KAZARIYA, Hideaki SAWA
  • Patent number: 11077711
    Abstract: A rubber composition of the present technology is a rubber composition including a diene rubber and a filler; the diene rubber containing at least a styrene-butadiene copolymer; a radical generation index of the styrene-butadiene copolymer being not greater than 1.0 and being smaller than a value Y calculated by Equation (1): Y=?0.0186×(SV mass %+vinyl unit mol %)+1.5.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 3, 2021
    Inventors: Wataru Sakai, Takuma Arikawa, Ryosuke Sakai, Yu Shinke, Yuko Sekine, Fumito Yatsuyanagi
  • Patent number: 11008445
    Abstract: The present invention is to provide an aromatic vinyl-diene copolymer which exhibits excellent mechanical properties and wear resistance when being formed into a tire, a method for producing the aromatic vinyl-diene copolymer, and a rubber composition containing the aromatic vinyl-diene copolymer. The aromatic vinyl-diene copolymer of an embodiment of the present invention is an aromatic vinyl-diene copolymer which is a copolymer of an aromatic vinyl and a diene, wherein the content of a repeating unit derived from an aromatic vinyl is 18 mass % or greater, among repeating units derived from a diene, a proportion of a vinyl structure is 8 mol % or less, a proportion of a 1,4-trans structure is 75 mol % or less, and a proportion of a 1,4-cis structure is from 17 to 90 mol %, and a glass transition temperature is ?60° C. or lower.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: May 18, 2021
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Kazuya Uenishi, Makoto Ashiura, Motoji Fujita, Naoya Amino, Satoshi Mihara, Yu Shinke
  • Patent number: 11001654
    Abstract: The present invention is to provide a diene polymer that exhibits excellent low rolling resistance when used in a tire, a method for producing the diene polymer, and a rubber composition containing the diene polymer. The diene polymer of an embodiment of the present invention is produced by polymerizing a monomer containing at least a diene monomer by using an initiator prepared from an organolithium compound, an alkyl aluminum, and a metal alcoholate, and then terminating the polymerization by using an electrophile selected from the group consisting of titanium halides, tin halides, cyclic silazanes, alkoxysilanes, epoxides, amines, ketones, and compounds represented by Formula (N) below.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: May 11, 2021
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Kazuya Uenishi, Naoya Amino, Makoto Ashiura, Motoji Fujita, Satoshi Mihara, Yu Shinke
  • Publication number: 20200377624
    Abstract: The present invention provides a compounding agent which, when used in a rubber composition containing a reinforcing filler, exhibits excellent dispersibility, workability, toughness, low heat build-up, and wear resistance; and a rubber composition containing the compounding agent. A modified butadiene polymer of the present invention has a functional group containing a nitrogen atom and silicon atom at a terminal, a weight average molecular weight of the modified butadiene polymer being from 1000 to 15000, and a molecular weight distribution of the modified butadiene polymer being 2.0 or less.
    Type: Application
    Filed: May 8, 2018
    Publication date: December 3, 2020
    Inventors: Yu SHINKE, Kazuya UENISHI
  • Publication number: 20200339720
    Abstract: A polymer includes a repeating unit represented by Formula (1) and/or a repeating unit represented by Formula (2), and a repeating unit represented by Formula (3) and/or a repeating unit represented by Formula (4), where a proportion of a total of the repeating unit represented by Formula (1) and the repeating unit represented by Formula (2) is greater than 0 mol % but ?100 mol %; a proportion of a total of the repeating unit represented by Formula (3) and the repeating unit represented by Formula (4) is ?0 mol % but less than 100 mol %; a proportion of a total of the repeating unit represented by Formula (1) and the repeating unit represented by Formula (3) is ?20 mol %; and a proportion of a total of the repeating unit represented by Formula (2) and the repeating unit represented by Formula (4) is ?80 mol %.
    Type: Application
    Filed: November 12, 2018
    Publication date: October 29, 2020
    Inventors: Yu SHINKE, Kazuya UENISHI
  • Publication number: 20200325310
    Abstract: A rubber composition for a tire contains a diene rubber, silica, and a specific modified butadiene polymer, wherein the diene rubber contains an aromatic vinyl-conjugated diene rubber A and at least one rubber component B selected from an aromatic vinyl-conjugated diene rubber b1 other than the rubber A and a butadiene rubber b2 having a weight average molecular weight of ?15000. A content of the aromatic vinyl-conjugated diene rubber A is from 30 to 90% by mass, and a content of the rubber component B is from 10 to 70% by mass, an average TG of the diene rubber is lower than ?20° C., a content of the silica is from 80 to 200 parts by mass per 100 parts by mass of the diene rubber, and a content of the modified butadiene polymer is from 1.0 to 25.0% by mass with respect to content of the silica.
    Type: Application
    Filed: October 4, 2018
    Publication date: October 15, 2020
    Inventors: Ayaki KAZARIYA, Makoto ASHIURA, Satoshi MIHARA, Kazuya UENISHI, Yu SHINKE
  • Publication number: 20190375872
    Abstract: An object of the present invention is to provide a conveyor belt rubber composition having excellent wear resistance and gouging resistance, a method for producing the conveyor belt rubber composition, a conveyor belt formed using the conveyor belt rubber composition, and a belt conveyor equipped with the conveyor belt. The present invention relates to a conveyor belt rubber composition containing a diene rubber containing less than 50 mass % of an aromatic vinyl-conjugated diene copolymer, wherein the aromatic vinyl-conjugated diene copolymer has a content of repeating units derived from an aromatic vinyl of 20 mass % or less, and a proportion of a vinyl structure in repeating units derived from a conjugated diene of 8 mol % or less.
    Type: Application
    Filed: February 22, 2018
    Publication date: December 12, 2019
    Inventors: Yu SHINKE, Deqing ZOU, Jun MIYAJI, Kazuya UENISHI
  • Publication number: 20190375873
    Abstract: An object of the present invention is to provide a conveyor belt rubber composition having excellent cut resistance and wear resistance, a method for producing the conveyor belt rubber composition, a conveyor belt formed using the conveyor belt rubber composition, and a belt conveyor equipped with the conveyor belt. The present invention relates to a conveyor belt rubber composition containing a diene rubber containing 50 mass % or more of an aromatic vinyl-conjugated diene copolymer, wherein the aromatic vinyl-conjugated diene copolymer has a content of repeating units derived from an aromatic vinyl of more than 20 mass %, and a proportion of a vinyl structure in repeating units derived from a conjugated diene of 8 mol % or less.
    Type: Application
    Filed: February 22, 2018
    Publication date: December 12, 2019
    Inventors: Yu SHINKE, Deqing ZOU, Jun MIYAJI, Kazuya UENISHI
  • Publication number: 20190023880
    Abstract: The present invention is to provide an aromatic vinyl-diene copolymer which exhibits excellent mechanical properties and wear resistance when being formed into a tire, a method for producing the aromatic vinyl-diene copolymer, and a rubber composition containing the aromatic vinyl-diene copolymer. The aromatic vinyl-diene copolymer of an embodiment of the present invention is an aromatic vinyl-diene copolymer which is a copolymer of an aromatic vinyl and a diene, wherein the content of a repeating unit derived from an aromatic vinyl is 18 mass % or greater, among repeating units derived from a diene, a proportion of a vinyl structure is 8 mol % or less, a proportion of a 1,4-trans structure is 75 mol % or less, and a proportion of a 1,4-cis structure is from 17 to 90 mol %, and a glass transition temperature is ?60° C. or lower.
    Type: Application
    Filed: February 10, 2017
    Publication date: January 24, 2019
    Applicant: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Kazuya UENISHI, Makoto ASHIURA, Motoji FUJITA, Naoya AMINO, Satoshi MIHARA, Yu SHINKE
  • Publication number: 20180282446
    Abstract: The present invention is to provide a diene polymer that exhibits excellent low rolling resistance when used in a tire, a method for producing the diene polymer, and a rubber composition containing the diene polymer. The diene polymer of an embodiment of the present invention is produced by polymerizing a monomer containing at least a diene monomer by using an initiator prepared from an organolithium compound, an alkyl aluminum, and a metal alcoholate, and then terminating the polymerization by using an electrophile selected from the group consisting of titanium halides, tin halides, cyclic silazanes, alkoxysilanes, epoxides, amines, ketones, and compounds represented by Formula (N) below.
    Type: Application
    Filed: September 8, 2016
    Publication date: October 4, 2018
    Inventors: Kazuya UENISHI, Naoya AMINO, Makoto ASHIURA, Motoji FUJITA, Satoshi MIHARA, Yu SHINKE
  • Publication number: 20180134078
    Abstract: A rubber composition of the present technology is a rubber composition including a diene rubber and a filler; the diene rubber containing at least a styrene-butadiene copolymer; a radical generation index of the styrene-butadiene copolymer being not greater than 1.0 and being smaller than a value Y calculated by Equation (1): Y=?0.0186×(SV mass %+vinyl unit mol %)+1.5.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 17, 2018
    Inventors: Wataru Sakai, Takuma Arikawa, Ryosuke Sakai, Yu Shinke, Yuko Sekine, Fumito Yatsuyanagi