Patents by Inventor Tomoki HIGA

Tomoki HIGA 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: 20220380579
    Abstract: Provided is a rubber composition comprising at least NBR as a rubber component and having rubber-metal adhesiveness equal to or higher than that of a rubber composition comprising a cobalt salt. The rubber composition comprises a rubber component, and a rubber-metal adhesion promoter, where the rubber component comprises at least 10 parts by mass of NBR per 100 parts by mass of the rubber component, the rubber-metal adhesion promoter comprises at least one selected from the group consisting of a metal salt of an aliphatic carboxylic acid (1) and a compound (2) having a specific structure.
    Type: Application
    Filed: August 21, 2020
    Publication date: December 1, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Tomoki HIGA
  • Publication number: 20220340737
    Abstract: Provided is a rubber composition comprising at least CR as a rubber component and having rubber-metal adhesiveness equal to or higher than that of a rubber composition comprising a cobalt salt. The rubber composition comprises a rubber component, and a rubber-metal adhesion promoter, where the rubber component comprises at least 10 parts by mass of CR per 100 parts by mass of the rubber component, the rubber-metal adhesion promoter comprises at least one selected from the group consisting of a metal salt of an aliphatic carboxylic acid (1) and a compound (2) having a specific structure.
    Type: Application
    Filed: August 21, 2020
    Publication date: October 27, 2022
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Tomoki HIGA
  • Patent number: 10518581
    Abstract: The rubber composition of this disclosure is a rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein: the rubber component is separated into two or more polymer phases with different peak temperatures of tan ? temperature dispersion curve; a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass; 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan ? temperature dispersion curve; and the filler has an average aggregate area of 2100 nm2 or less.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: December 31, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Tomoki Higa, Kenji Nakatani
  • Publication number: 20190077891
    Abstract: The present disclosure provides a method for manufacturing with high productivity a modified polymer equivalent to the prior art blend of a modified polymer for matrix of a rubber composition and the low-molecular weight polymer. Specifically, a method for manufacturing a modified polymer, including continuously supplying a raw material monomer containing at least conjugated diene compound, a polymerization initiator containing lithium, 1,2-butadiene and a modification agent into a flow-through reactor, causing the raw material monomer to be continuously polymerized to generate polymer and also causing a portion of the polymer thus generated to be modified with the modification agent, is characterized in that: the polymerization and the modification are carried out at temperature equal to 110° C. or higher; and a mole ratio (1,2-Bd/Li) of the 1,2-butadiene (1,2-Bd) with respect to lithium (Li) of the polymerization initiator containing lithium is set to be 0.37 or less.
    Type: Application
    Filed: March 28, 2017
    Publication date: March 14, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Kenji NAKATANI, Tomoki HIGA, Shunsuke TSUDA
  • Publication number: 20180117967
    Abstract: The rubber composition of this disclosure is a rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein: the rubber component is separated into two or more polymer phases with different peak temperatures of tan ? temperature dispersion curve; a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass; 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan ? temperature dispersion curve; and the filler has an average aggregate area of 2100 nm2 or less.
    Type: Application
    Filed: May 16, 2016
    Publication date: May 3, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Tomoki HIGA, Kenji NAKATANI