Patents by Inventor Midori KAWADA

Midori KAWADA 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: 20240327547
    Abstract: Provided is a crosslinked elastomer that can easily be decrosslinked. The crosslinked elastomer is obtained through crosslinking of a diene elastomer that has a vinyl bond content of 30 mass % or less and a weight-average molecular weight of 1,000 or more. The crosslinked elastomer includes a diboronic acid ester skeleton unit represented by a specific general formula (1) at a crosslinking site.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 3, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Midori KAWADA, Yasuo HORIKAWA, Mari MIYANO
  • Publication number: 20240327548
    Abstract: Provided is a method of crosslinking an elastomer that uses an elastomer that can easily be crosslinked and decrosslinked. The method of crosslinking an elastomer includes a step of causing contact of an elastomer including a monoboronic acid ester-containing functional group represented by a specific general formula (4) with a diboronic acid compound in the presence of a solvent. The solvent has an SP value of not less than 10 (cal/cm3)1/2 and not more than 13 (cal/cm3)1/2 and includes at least a single solvent having an SP value of not less than 8 (cal/cm3)1/2 and not more than 10 (cal/cm3)1/2.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 3, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Midori KAWADA, Yasuo HORIKAWA, Mari MIYANO
  • Publication number: 20240301096
    Abstract: Provided is a method by which a crosslinking site of a crosslinked elastomer can easily be returned to a non-crosslinked state. The method of returning a crosslinking site of a crosslinked elastomer to a non-crosslinked state includes a step of causing contact of a crosslinked elastomer including a diboronic acid ester skeleton unit represented by a specific general formula (1) at a crosslinking site with a monoboronic acid compound represented by a specific general formula (3) in the presence of an organic solvent having an SP value (solubility parameter) of not less than 7 (cal/cm3)1/2 and not more than 10 (cal/cm3)1/2. In this step, a molar abundance ratio of the monoboronic acid compound relative to the diboronic acid ester skeleton unit (monoboronic acid compound/diboronic acid ester skeleton unit) is set as more than 2 and not more than 5.
    Type: Application
    Filed: June 30, 2022
    Publication date: September 12, 2024
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Midori KAWADA, Yasuo HORIKAWA, Mari MIYANO
  • Publication number: 20190061423
    Abstract: A tire includes a rubber member and a round tire frame made of a resin material. The resin material includes a thermoplastic elastomer, and has a deflection temperature under load of 150° C. or higher. The thermoplastic elastomer includes a soft segment and a hard segment derived from a polyamide. A minimum number X of carbon atoms present between nitrogen atoms in the main chain of the polyamide in the hard segment and a molecular weight Y of the hard segment satisfy the following Formulae 1 to 3: Y=250X+A??Formula 1: 6?X?12??Formula 2: ?1000?A?1500.
    Type: Application
    Filed: February 21, 2017
    Publication date: February 28, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yuki ITOH, Midori KAWADA, Mari MIYANO