Patents by Inventor Eiichi Terada

Eiichi Terada 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).

  • Method for producing vinyl aromatic resin composition
    Patent number: 4732924
    Abstract: Disclosed is a method for producing a vinyl aromatic resin composition containing a rubber in a disposed state which comprises from 60 to 90% by weight of a copolymer of a vinyl aromatic monomer with an unsaturated dicarboxylic anhydride in which the content of the vinyl aromatic monomer as a monomer unit is from 70 to 98 mol % and the content of the unsaturated dicarboxylic anhydride as a monomer unit is from 2 to 30 mol %, from 10 to 35% by weight of a graft copolymer and from 0 to 9% by weight of a diene based rubber, by copolymerizing the vinyl aromatic monomer with the unsaturated dicarboxylic anhydride in the presence of the diene based rubber, wherein said method comprises.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: March 22, 1988
    Assignee: Idemitsu Petrochemical Company Limited
    Inventors: Eiichi Terada, Hiroshi Kurokawa, Shigemi Kawazoe
  • Process of producing copolymers of an aromatic vinyl monomer and maleic anhydride
    Patent number: 4420599
    Abstract: A process of producing a copolymer of aromatic vinyl compound and maleic anhydride by adding half-ester maleate in two or more steps to the aromatic vinyl compound to perform the copolymerization reaction, and dealcoholating the unit of the half-ester maleate in the resulting copolymer to cyclize. The thus obtained aromatic vinyl compound-maleic anhydride copolymer has excellent transparency and thermal resistance.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: December 13, 1983
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Kenji Seki, Eiichi Terada