Patents by Inventor Kouji Shouya

Kouji Shouya 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).

  • Conjugated diene rubber, process for producing the same, and rubber composition
    Patent number: 7241842
    Abstract: A conjugated diene rubber obtained by a process wherein active conjugated diene polymer chains each having an active metal at a polymer chain terminal, which have been obtained by polymerizing a conjugated diene monomer alone, or a conjugated diene monomer and an aromatic vinyl monomer with the aid of an organic active metal in an inert solvent, are allowed to react with a specific polyorganosiloxane capable of reacting with the active metal bonded to the polymer chain terminal. The conjugated diene rubber contains at least 5% by weight of a structure comprising at least three conjugated diene polymer chains bonded through a polyorganosiloxane. The conjugated diene rubber gives, when silica is incorporated therein, a rubber composition having good processability and giving a crosslinked rubber having reduced heat build-up, good wet grip performance and good abrasion resistance.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: July 10, 2007
    Assignee: Zeon Corporation
    Inventors: Masao Nakamura, Masaaki Komatsu, Kouji Shouya, Kiyonori Umetsu, Takeshi Karato, Takahiko Fukahori
  • Conjugated diene rubber, process for producing the same, and rubber composition
    Publication number: 20060155076
    Abstract: A conjugated diene rubber obtained by a process wherein active conjugated diene polymer chains each having an active metal at a polymer chain terminal, which have been obtained by polymerizing a conjugated diene monomer alone, or a conjugated diene monomer and an aromatic vinyl monomer with the aid of an organic active metal in an inert solvent, are allowed to react with a specific polyorganosiloxane capable of reacting with the active metal bonded to the polymer chain terminal. The conjugated diene rubber contains at least 5% by weight of a structure comprising at least three conjugated diene polymer chains bonded through a polyorganosiloxane. The conjugated diene rubber gives, when silica is incorporated therein, a rubber composition having good processability and giving a crosslinked rubber having reduced heat build-up, good wet grip performance and good abrasion resistance.
    Type: Application
    Filed: June 2, 2003
    Publication date: July 13, 2006
    Applicant: Zeon Corporation
    Inventors: Masao Nakamura, Masaaki Komatsu, Kouji Shouya, Kiyonori Umetsu, Takeshi Karato, Takahiko Fukahori