Patents by Inventor Masashi Shitara

Masashi Shitara 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).

  • Low gloss agents, process for production thereof, low gloss thermoplastic resin compositions, and molded articles
    Patent number: 5290876
    Abstract: A grafted copolymer containing low cis-polybutadiene having a Mooney viscosity of 30 to 40 as a rubber component, and 30% by volume or more of particles of said rubber component becoming non-spherical rubber particles when molded into a molded article, is suitable for use as a low gloss agent which is usable in the fields of internal and external automotive trims, exterior parts of household electric appliances, etc.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: March 1, 1994
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Seizou Mishima, Kiyotaka Mashita, Kazuyoshi Shike, Jun Matsuzawa, Masashi Shitara, Isamu Hattori
  • Low gloss agents, process for production thereof, low gloss thermoplastic resin compositions, and molded articles
    Patent number: 5216076
    Abstract: A grafted copolymer containing low cis-polybutadiene having a Mooney viscosity of 30 to 40 as a rubber component, and 30% by volume or more of particles of said rubber component becoming non-spherical rubber particles when molded into a molded article, is suitable for use as a low gloss agent which is usable in the fields of internal and external automotive trims, exterior parts of household electric appliances, etc.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: June 1, 1993
    Assignee: Hitachi Chemical Company
    Inventors: Seizou Mishima, Kiyotaka Mashita, Kazuyoshi Shike, Jun Matsuzawa, Masashi Shitara, Isamu Hattori
  • Impact modifier, thermoplastic resin composition using the same and molded article obtained therefrom
    Patent number: 5180786
    Abstract: An impact modifier obtained by emulsion polymerizing acrylic monomer(s), etc., in the presence of a conjugated diene rubber to give a graft rubber polymer, or obtained by polymerizing acrylic monomer(s) and the like ethylenically unsaturated monomers in the presence of the graft rubber polymer, is effective for improving impact resistance and weathering resistance of molded articles obtained from thermoplastic resin compositions containing such an impact modifier.
    Type: Grant
    Filed: November 7, 1989
    Date of Patent: January 19, 1993
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Susumu Era, Toshio Matsumoto, Yoshinori Kobayashi, Masashi Shitara, Isamu Hattori, Yoshihiro Nomura
  • Low gloss agents, process for production thereof, low gloss thermoplastic resin compositions, and molded articles
    Patent number: 5081193
    Abstract: A grafted copolymer containing low cis-polybutadiene having a Mooney viscosity of 30 to 40 as a rubber component, and 30% by volume or more of particles of said rubber component becoming non-spherical rubber particles when molded into a molded article, is suitable for use as a low gloss agent which is usable in the fields of internal and external automotive trims, exterior parts of household electric applicances, etc.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: January 14, 1992
    Assignee: Hitachi Chemical Company Ltd.
    Inventors: Seizou Mishima, Kiyotaka Mashita, Kazuyoshi Shike, Jun Matsuzawa, Masashi Shitara, Isamu Hattori
  • Ether imides and process for producing the same
    Patent number: 4460783
    Abstract: An ether imide of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and D are as defined in the specification produced by reacting a diamine with an ethylenically unsaturated dicarboxylic acid can give a composition together with one or more unsaturated polyesters, epoxy compounds, amines, and the like to give shaped articles excellent in flexibility and heat resistance.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: July 17, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Akio Nishikawa, Masashi Shitara, Susumu Era, Toshiaki Fukushima, Hiroshi Suzuki, Hisashi Kohkame