Patents by Inventor Tae Chui Lee

Tae Chui 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).

  • Method for preparing modified conjugated diene-based polymer
    Patent number: 10920004
    Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 16, 2021
    Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung Lee
  • Method for preparing modified conjugated diene-based polymer
    Patent number: 10882939
    Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 5, 2021
    Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung Lee