Patents Assigned to Mitsubishi Yuka Badische Company Limited
  • Polypropylene resin expanded particles
    Patent number: 5468781
    Abstract: There are provided polypropylene resin expanded particles which have a uniform bubble size, can be molded with an exceptionally low steam pressure, and can produce an expanded molded product having a good surface appearance and an excellent energy absorption property. The present particles are polypropylene resin expanded particles containing as a base resin an isotactic polypropylene resin polymerized in the presence of a metallocene polymerization catalyst.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: November 21, 1995
    Assignees: Mitsubishi Petrochemical Company Limited, Mitsubishi Yuka Badische Company Limited
    Inventors: Toshihiko Sugano, Toshihiro Gotoh