Patents by Inventor Chika Uzawa

Chika Uzawa 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).

  • Solid catalyst component for olefin polymerization, catalyst for olefin polymerization, and method for producing olefin polymer
    Patent number: 11192965
    Abstract: Provided is a solid catalyst component for olefin polymerization comprising an electron-donating compound other than a phthalate, the solid catalyst component being equal in the olefin-polymerizing activity and in the primary physical properties of the resulting polymer such as stereoregularity and molecular weight distribution to those with use of a phthalate as an electron-donating compound. A solid catalyst component for olefin polymerization comprises a magnesium atom, a titanium atom, a halogen atom, an ester compound (A) represented by a general formula (1) and a diester compound (B) represented by a general formula (2), wherein a ratio represented by the following expression: (content (mass %) of ester compound (A)/content (mass %) of diester compound (B)) is 0.05 to 50.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: December 7, 2021
    Assignee: TOHO TITANIUM CO., LTD.
    Inventors: Toshiya Uozumi, Hiroyuki Kono, Shinta Marui, Chika Uzawa
  • SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION, CATALYST FOR OLEFIN POLYMERIZATION, AND METHOD FOR PRODUCING OLEFIN POLYMER
    Publication number: 20210040247
    Abstract: Provided is a solid catalyst component for olefin polymerization comprising an electron-donating compound other than a phthalate, the solid catalyst component being equal in the olefin-polymerizing activity and in the primary physical properties of the resulting polymer such as stereoregularity and molecular weight distribution to those with use of a phthalate as an electron-donating compound. A solid catalyst component for olefin polymerization comprises a magnesium atom, a titanium atom, a halogen atom, an ester compound (A) represented by a general formula (1) and a diester compound (B) represented by a general formula (2), wherein a ratio represented by the following expression: (content (mass %) of ester compound (A)/content (mass %) of diester compound (B)) is 0.05 to 50.
    Type: Application
    Filed: December 26, 2016
    Publication date: February 11, 2021
    Applicant: TOHO TITANIUM CO., LTD.
    Inventors: Toshiya Uozumi, Hiroyuki Kono, Shinta Marui, Chika Uzawa