Patents by Inventor Jun-sik NAM

Jun-sik NAM 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).

  • PMMA RESIN WITH IMPROVED SCRATCH RESISTANCE AND IMPACT RESISTANCE AND PREPARATION METHOD THEREOF
    Publication number: 20240327559
    Abstract: The present inventive concept relates to a PMMA resin that has improved impact resistance and scratch resistance at the same time, while maintaining excellent optical properties of conventional PMMA resins, and a preparation method thereof. More specifically, the present inventive concept relates to a crosslinked PMMA resin comprising PMMA chains crosslinked among each other and polyamine as a crosslinking agent, wherein the polyamine is coupled between the PMMA chains to yield the crosslinked PMMA resins, wherein the polyamine is selected from the group consisting of diamine, triamine and tetramine that have a C2-C50 linear, branched or cyclic group.
    Type: Application
    Filed: March 12, 2024
    Publication date: October 3, 2024
    Inventors: Ji-woong PARK, Jun-sik NAM