Patents by Inventor Aujiru SON

Aujiru SON 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 composition for preparing elastic copolymer, and method for preparing elastic copolymer, which comprises ethylene and alpha-olefin or ethylene, alpha-olefin and unconjugated diene, by using same
    Patent number: 11220566
    Abstract: The present invention relates to a method for preparing an ethylene-based elastic copolymer, and more particularly, to a method for preparing an ethylene-based elastic copolymer by using a catalyst composition for preparing an ethylene-based elastic copolymer, the catalyst composition comprising a binuclear constrained geometry transition metal compound, as a main catalyst, having a structural advantage to obtain a high-molecular-weight ethylene-based elastic copolymer due to a high polymerization activity and comonomer reactivity because the binuclear constrained geometry transition metal compound has a structure in which cyclopentadiene ligands of two constrained geometry catalysts are linked by 1,4-phenylene, and one or more cocatalyst compounds selected from the group consisting of an organoaluminum compound, an organoaluminoxane compound, and a boron compound.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: January 11, 2022
    Assignee: KUMHO POLYCHEM CO., LTD.
    Inventors: Hag-Jun Kim, Hyun-Soo Kim, Sung Kwan Kim, Sungwoo Yoon, Hee Ryoung Koo, Aujiru Son
  • CATALYST COMPOSITION FOR PREPARING ELASTIC COPOLYMER, AND METHOD FOR PREPARING ELASTIC COPOLYMER, WHICH COMPRISES ETHYLENE AND ALPHA-OLEFIN OR ETHYLENE, ALPHA-OLEFIN AND UNCONJUGATED DIENE, BY USING SAME
    Publication number: 20200270382
    Abstract: The present invention relates to a method for preparing an ethylene-based elastic copolymer, and more particularly, to a method for preparing an ethylene-based elastic copolymer by using a catalyst composition for preparing an ethylene-based elastic copolymer, the catalyst composition comprising a binuclear constrained geometry transition metal compound, as a main catalyst, having a structural advantage to obtain a high-molecular-weight ethylene-based elastic copolymer due to a high polymerization activity and comonomer reactivity because the binuclear constrained geometry transition metal compound has a structure in which cyclopentadiene ligands of two constrained geometry catalysts are linked by 1,4-phenylene, and one or more cocatalyst compounds selected from the group consisting of an organoaluminum compound, an organoaluminoxane compound, and a boron compound.
    Type: Application
    Filed: November 15, 2018
    Publication date: August 27, 2020
    Inventors: Hag-Jun KIM, Hyun-Soo KIM, Sung Kwan KIM, Sungwoo YOON, Hee Ryoung KOO, Aujiru SON