Patents Assigned to Nissan Maruzen Polyethylene Company
  • Process for producing a blow molding resin
    Patent number: 4528151
    Abstract: A process for producing a blow molding resin comprises pelletizing a high density polyethylene prepared by means of a highly active Ziegler catalyst, at a temperature of at least 230.degree. C. in the presence of air or oxygen so as not to change the average molecular weight and the molecular weight distribution.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: July 9, 1985
    Assignees: Nissan Chemical Industries, Ltd., Nissan Maruzen Polyethylene Company
    Inventors: Yoshiho Matsuo, Ryoji Nishijima, Atsuhiko Yoshino, Takai Kawashima
  • Process for producing a blow molding resin
    Patent number: 4508878
    Abstract: A process for producing a blow molding resin comprises pelletizing a high density polyethylene prepared by means of highly active Ziegler catalyst, characterized in that a small amount of a cross linking agent is added to the high density polyethylene and the pelletizing is conducted in an atmosphere containing a small amount of oxygen.
    Type: Grant
    Filed: September 8, 1983
    Date of Patent: April 2, 1985
    Assignees: Nissan Chemical Industries Ltd, Nissan Maruzen Polyethylene Company
    Inventors: Yoshiho Matsuo, Atsuhiko Yoshino, Ryoji Nishijima