Patents by Inventor Masatoshi Ookura

Masatoshi Ookura 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).

  • Catalyst for the polymerization of olefines and processes for the polymerization of olefines using the same
    Patent number: 5747595
    Abstract: A catalyst for the polymerization of olefines comprises a solid catalytic component obtained by pre-polymerizing propylene in the presence of (A) a solid component containing magnesium, titanium, halogen and an electron-donating compound, (B) an organoaluminum compound, and (C) an alkylalkoxysilane represented by the formula, R.sup.1 Si(OR.sup.2)(OCH.sub.3).sub.2, wherein R.sup.1 represents a branched or cyclic alkyl group having 3 to 6 carbon atoms, and R.sup.2 represents a branched alkyl, alkenyl or alkinyl group having 3 to 6 carbon atoms; (B) an organoaluminum compound; and (D) an alkyltrialkoxysilane represented by the formula, R.sup.3 Si(OR.sup.4).sub.2 (OCH.sub.3), wherein R.sup.3 represents a linear alkyl group having 3 to 6 carbon atoms, and R.sup.4 represents a branched alkyl, alkenyl or alkinyl group having 3 to 5 carbon atoms.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: May 5, 1998
    Assignee: Tonen Corporation
    Inventors: Toshiya Saito, Takayuki Taki, Masashi Nakajima, Kunihiko Imanishi, Masahide Murata, Hiroyuki Ozaki, Kazukiyo Aiba, Masatoshi Ookura, Satoshi Ueki