Patents by Inventor Noboru Moriwaki

Noboru Moriwaki 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).

  • Process for production of chlorinated ethylene-propylene copolymers
    Patent number: 5466757
    Abstract: A chlorinated ethylene-propylene copolymer having a chlorine content of 20 to 45% by weight and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150 is produced by chlorinating in two or three stages, by contact with chlorine gas in an aqueous suspension, an ethylene-propylene copolymer having a propylene content of 15 to 40% by weight, a melt flow index of 0.01 to 5.0 g/10 minutes, a melting peak as measured by differential scan calorimeter (DSC) of 80.degree. C. or more, a crystallinity as measured by X-rays of 3% or more, an index M.sub.W /M.sub.N of the distribution of molecular wieght, determined by gel permeation chromatography (GPC), of greater than 4, and a Mooney visocisty (ML.sub.1+4, 100.degree. C.) of 10 to 180.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: November 14, 1995
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Naotoshi Watanabe, Tsuyoshi Masukawa, Kenji Ozaki, Noboru Moriwaki
  • Process for production of chlorinated ethylene-propylene copolymers
    Patent number: 5087673
    Abstract: A chlorinated ethylene-propylene copolymer having a chlorine content of 20 to 45% by weight and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150 is produced by chlorinating in two or three stages, by contact with chlorine gas in an aqueous suspension, an ethylene-propylene copolymer having a propylene content of 15 to 40% by weight, a melt flow index of 0.01 to 5.0 g/10 minutes, a melting peak as measured by differential scan calorimeter (DSC) of 80.degree. C. or more, a crystallinity as measured by X-rays of 3% or more, an index M.sub.W /M.sub.N of the distribution of molecular weight, determined by gel permeation chromatography (GPC), of greater than 4, and a Mooney visocisty (ML.sub.1+4, 100.degree. C.) of 10 to 180.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: February 11, 1992
    Assignee: Showa Denko K.K.
    Inventors: Naotoshi Watanabe, Tsuyoshi Masukawa, Kenji Ozaki, Noboru Moriwaki