Patents by Inventor Masamitsu Yamauchi

Masamitsu Yamauchi 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).

  • Polyolefin masterbatch and composition suitable for injection molding
    Patent number: 6586531
    Abstract: A masterbatch composition, a polyolefin composition prepared from the masterbatch and articles prepared from the polyolefin composition. The masterbatch contains (percent by weight) from 20% to 90% of A) a crystalline polypropylene containing from 25% to 75% of a fraction AI having a melt flow rate MFRI of from 0.5 to 10 g/10 min., and from 75% to 25% of a fraction AII having a melt flow rate MFRII such that MFRII/MFRI is from 30 to 2000; and from 10% to 80% of B) a copolymer of ethylene and at least one C3-C10 &agr;-olefin, the copolymer containing from 10 to 70% of ethylene, the copolymer being soluble in xylene at room temperature, and having an intrinsic viscosity [&eegr;] of from 4 to 9 dl/g. Articles prepared from the polyolefin composition exhibit a good balance of physical properties and reduced surface defects such as tiger striping.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: July 1, 2003
    Assignee: Basell Poliolefine Italia S.p.A.
    Inventors: Junichiro Washiyama, Kazuhiko Minowa, Hiroshi Takenouchi, Takeshi Nakajima, Masamitsu Yamauchi, Yutaka Yokoyama, Anteo Pelliconi
  • Polyolefin masterbatch and composition suitable for injection molding
    Publication number: 20030040583
    Abstract: A masterbatch composition, a polyolefin composition prepared from the masterbatch and articles prepared from the polyolefin composition. The masterbatch contains (percent by weight) from 20% to 90% of A) a crystalline polypropylene containing from 25% to 75% of a fraction AI having a melt flow rate MFRI of from 0.5 to 10 g/10 min., and from 75% to 25% of a fraction AII having a melt flow rate MFRII such that MFRII/MFRI is from 30 to 2000; and from 10% to 80% of B) a copolymer of ethylene and at least one C3-C10 &agr;-olefin, the copolymer containing from 10 to 70% of ethylene, the copolymer being soluble in xylene at room temperature, and having an intrinsic viscosity [&eegr;] of from 4 to 9 dl/g. Articles prepared from the polyolefin composition exhibit a good balance of physical properties and reduced surface defects such as tiger striping.
    Type: Application
    Filed: September 27, 2001
    Publication date: February 27, 2003
    Inventors: Junichiro Washiyama, Kazuhiko Minowa, Hiroshi Takenouchi, Takeshi Nakajima, Masamitsu Yamauchi, Yutaka Yokoyama, Anteo Pelliconi