Patents by Inventor Mitsuharu AMBE

Mitsuharu AMBE 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).

  • Rubber composition for tire
    Patent number: 10377883
    Abstract: The present invention provides a rubber composition for a tire having improved workability and abrasion resistance. A rubber composition for a tire according to the present invention comprises: a polybutadiene which has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C. measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00; another rubber (ii); and a rubber reinforcing material (iii).
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: August 13, 2019
    Assignees: UBE INDUSTRIES, LTD., SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Mitsuharu Ambe, Yuuto Kanou, Takeshi Shoda, Takahiro Mabuchi, Toshifumi Haba
  • Polybutadiene
    Patent number: 9676881
    Abstract: The present invention provides a polybutadiene having improved workability and abrasion resistance. A polybutadiene according to the present invention has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C.measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: June 13, 2017
    Assignee: UBE INDUSTRIES, LTD.
    Inventors: Mitsuharu Ambe, Yuuto Kanou, Takeshi Shoda
  • RUBBER COMPOSITION FOR TIRE
    Publication number: 20170107358
    Abstract: The present invention provides a rubber composition for a tire having improved workability and abrasion resistance. A rubber composition for a tire according to the present invention comprises: a polybutadiene which has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C. measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00; another rubber (ii); and a rubber reinforcing material (iii).
    Type: Application
    Filed: February 19, 2015
    Publication date: April 20, 2017
    Applicants: UBE INDUSTRIES, LTD., SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Mitsuharu AMBE, Yuuto KANOU, Takeshi SHODA, Takahiro MABUCHI, Toshifumi HABA
  • POLYBUTADIENE
    Publication number: 20170015766
    Abstract: The present invention provides a polybutadiene having improved workability and abrasion resistance. A polybutadiene according to the present invention has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C.measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00.
    Type: Application
    Filed: February 19, 2015
    Publication date: January 19, 2017
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Mitsuharu AMBE, Yuuto KANOU, Takeshi SHODA