Patents by Inventor Seiki Kiuchi

Seiki Kiuchi 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 and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component for olefin polymerization
    Patent number: 6828396
    Abstract: There are provided: (I) a solid catalyst component (A-1) for olefin polymerization, which is obtained by a process comprising the step of contacting: (a-1) a carrier of carboxyl group-carrying polymer particles having an average particle diameter of from 1 to 300 &mgr;m, and (b) a transition metal compound of the number 4 group of metals in the periodic table of elements; (II) a catalyst for olefin polymerization, which is obtained by a process comprising the step of contacting: (A-1) the above solid catalyst component, and (B) at least one compound selected from the group consisting of an organoaluminum compound and an organoaluminumoxy compound; (III) a process for producing an olefin polymer, which comprises the step of polymerizing an olefin in the presence of the above catalyst; and (IV) a process for producing the above solid catalyst component (A-1), which comprises the step of contacting: (a-1) the above carrier, and (b) the above transition metal compound.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: December 7, 2004
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tatsuya Miyatake, Masaaki Nabika, Seiki Kiuchi
  • Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component
    Patent number: 6727333
    Abstract: There are disclosed: (i) a first solid catalyst component (A1) obtained by contacting (a) a carrier of carboxyl group-carrying polymer particles having an average particle size of from about 1 to 200 &mgr;m, (b) an organometallic compound of the number 1, 2 or 13 group of metals in the periodic table of elements, and (c) a transition metal compound of the number 4 group of metals of the periodic table of elements, and a second solid catalyst component (A2) obtained by contacting (a), (b), (c) and (d) a phenol compound, and production processes of the solid catalyst components (A1) and (A2), (ii) a catalyst obtained by combining the solid catalyst component (A1) or (A2) with an organoaluminum compound (B); and (iii) a process for producing an olefin polymer with a catalyst of the invention, wherein the polymer produced is extremely low in its content of lower molecular weight components and low crystallinity components, and superior in its powder properties.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: April 27, 2004
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kotohiro Nomura, Seiki Kiuchi, Tatsuya Miyatake
  • Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component for olefin polymerization
    Publication number: 20030130110
    Abstract: There are provided:
    Type: Application
    Filed: January 21, 2003
    Publication date: July 10, 2003
    Inventors: Tatsuya Miyatake, Masaaki Nabika, Seiki Kiuchi
  • Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component for olefin polymerization
    Patent number: 6544921
    Abstract: There are provided: (I) a solid catalyst component (A-1) for olefin polymerization, which is obtained by a process comprising the step of contacting: (a-1) a carrier of carboxyl group-carrying polymer particles having an average particle diameter of from 1 to 300 &mgr;m, and (b) a transition metal compound of the number 4 group of metals in the periodic table of elements; (II) a catalyst for olefin polymerization, which is obtained by a process comprising the step of contacting: (A-1) the above solid catalyst component, and (B) at least one compound selected from the group consisting of an organoaluminum compound and an organoaluminumoxy compound; (III) a process for producing an olefin polymer, which comprises the step of polymerizing an olefin in the presence of the above catalyst; and (IV) a process for producing the above solid catalyst component (A-1), which comprises the step of contacting: (a-1) the above carrier, and (b) the above transition metal compound.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: April 8, 2003
    Assignee: Sumitomo Chemical Comapny, Limited
    Inventors: Tatsuya Miyatake, Masaaki Nabika, Seiki Kiuchi
  • Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component
    Publication number: 20020193243
    Abstract: There are disclosed:
    Type: Application
    Filed: July 30, 2002
    Publication date: December 19, 2002
    Inventors: Kotohiro Nomura, Seiki Kiuchi, Tatsuya Miyatake
  • Solid catalyst component and catalyst for olefin polymerization, process for producing olefin polymer and process for producing solid catalyst component
    Patent number: 6468937
    Abstract: There are disclosed: (i) a first solid catalyst component obtained by contacting (a) a carrier of carboxyl group-carrying polymer particles having an average particle size of from about 1 to 200 &mgr;m with spherical or elliptical particles morphology (b) an organometallic compound of the number 1, 2 or 13 group of metals in the periodic table of elements, and (c) a transition metal compound of the number 4 group of metals of the periodic table of elements, and a second solid catalyst component obtained by contacting (a), (b), (c) and (d) a phenol compound, and production processes of the two solid catalyst components, (ii) a catalyst obtained by combining the two solid catalyst components with an organoaluminum compound; and (iii) a process for producing an olefin polymer with a catalyst of the invention, wherein the polymer produced is extremely low in its content of lower molecular weight components and low crystallinity components, and superior in its powder properties.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: October 22, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kotohiro Nomura, Seiki Kiuchi, Tatsuya Miyatake