Patents by Inventor Mal-Ou Lee

Mal-Ou Lee 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).

  • Patent number: 7833926
    Abstract: The present invention relates to an arylphenoxy catalyst system producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group IV arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group IV transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes an environmentally-friendly raw material, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: November 16, 2010
    Assignee: SK Energy Co., Ltd.
    Inventors: Tae Woo Woo, Myung Ahn Ok, Jong Sok Hahn, Mal-Ou Lee, Sang Ook Kang, Sung-bo Ko, Tae-Jin Kim, Sung-Kwan Kim
  • Publication number: 20090326175
    Abstract: The present invention relates to an arylphenoxy catalyst system producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group IV arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group IV transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes an environmentally-friendly raw material, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.
    Type: Application
    Filed: July 31, 2009
    Publication date: December 31, 2009
    Applicant: SK Energy Co., Ltd.
    Inventors: Tae Woo Woo, Myung Ahn Ok, Jong Sok Hahn, Mal Ou Lee, Sang Ook Kang, Sung Bo Ko, Tae Jin Kim, Sung Kwan Kim
  • Patent number: 7589042
    Abstract: Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group 4 arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadienyl derivative and arylphenoxide as fixed ligands are located around the group 4 transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes non-toxic raw materials, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: September 15, 2009
    Assignee: SK Corporation
    Inventors: Tae-Woo Woo, Myung-Ahn Ok, Jong-sok Hahn, Mal-Ou Lee, Sang-Ook Kang, Sung-bo Ko, Tae-Jin Kim, Sung Kun Kim
  • Publication number: 20070135297
    Abstract: Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group 4 arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group 4 transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes non-toxic raw materials, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.
    Type: Application
    Filed: February 6, 2007
    Publication date: June 14, 2007
    Applicant: SK CORPORATION
    Inventors: Tae-Woo Woo, Myung-Ahn Ok, Jong-Sok Hahn, Mal-Ou Lee, Sang-Ook Kang, Sung-Bo Ko, Tae-Jin Kim, Sung-Kwan Kim