Patents by Inventor Deok Kyeong Kim

Deok Kyeong Kim 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).

  • High stereospecific polybutylene polymer and highly active process for preparation thereof
    Patent number: 7345122
    Abstract: Disclosed is a process for the preparation of a high stereospecific (isotactic) polybutylene polymer comprising the step of polymerizing a reactive monomer, 1-butene, which is used or is not used as a solvent, in the presence of catalyst and inert gas. According to the present invention, it is possible to prepare a high stereospecific polybutylene polymer in much higher activity than that of any other known processes for the preparation of a high stereospecific polybutylene polymer. The high stereospecific polybutylene polymer according to the present invention is a homopolymer of 1-butene, or a copolymer containing a-olefin and up to 40% by weight of a comonomer, wherein titanium in the catalyst residues is not detected in the ppm level, stereospecificity (Isotactic Index, mmmm %) determined by 13C-NMR is 96 or more, molecular weight distribution (Mw/Mn) is 3-6, and molecular weight distribution (Mw/Mn) can be controlled to 8 or more.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: March 18, 2008
    Assignee: Ylem Technology Holdings, Inc.
    Inventors: Seung Pyo Hong, Min Kyu Park, Deok Kyeong Kim, Seok Joong Hwang