Patents by Inventor Yoo Kyoung SHIM

Yoo Kyoung SHIM 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).

  • Publication number: 20250084276
    Abstract: The present invention relates to a biodegradable coating composition, a method for preparing same, and a biodegradable article using same. Particularly, according to an embodiment of the present invention, a biodegradable coating composition is a copolymerized polyhydroxyalkanoate (PHA) resin comprising a PHA resin, a surfactant, inorganic particles and a rheology modifier, and including 4-hydroxybutyrate (4-HB) repeating units. By using a PHA resin having a weight average molecular weight of 10,000-1,200,000 g/mol, the biodegradable coating composition is environmentally friendly due to excellent biodegradability and biocompatibility, and can have improved dispersibility, coatability, oil resistance and processability.
    Type: Application
    Filed: July 29, 2022
    Publication date: March 13, 2025
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Yoo-Kyoung SHIM, Soyun PARK, Jeung Yil PARK, Eun-Hye LEE, Jin Su CHUNG
  • Publication number: 20240343939
    Abstract: The present invention relates to a biodegradable coating composition, a method for manufacturing same, and a biodegradable article using same. Specifically, according to one embodiment of the present invention, the biodegradable coating composition is a copolymerized polyhydroxyalkanoate resin that comprises a polyhydroxyalkanoate (PHA) resin and a dispersant having a degree of saponification of at least 42 mol %, and comprises 4-hydroxybutyrate (4-HB) repeating units. Due to including 0.1 wt % to 60 wt % of the 4-hydroxybutyrate (4-HB) repeating units with respect to the total weight of the copolymerized polyhydroxyalkanoate resin, the biodegradable coating composition has excellent biodegradability and biocompatibility and can thus improve dispersibility, coating properties, water resistance, and processability while being environmentally friendly.
    Type: Application
    Filed: July 29, 2022
    Publication date: October 17, 2024
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Soyun PARK, Yoo-Kyoung SHIM, Jeung Yil PARK, Jin Su CHUNG
  • Publication number: 20240279407
    Abstract: The present invention relates to a polyhydroxyalkanoate (PHA) dispersion and a preparation method therefor. Specifically, according to one embodiment of the present invention, a method for preparing a PHA dispersion comprises a step of dispersing a PHA in a solvent by using particle dispersion, melt dispersion or solvent extraction, so that a PHA dispersion, which comprises PHA particles having an average diameter of 0.5-5 ?m and a deviation of diameter of ±0.3 ?m, can be prepared, and thus dispersibility, dispersion stability and processability can be improved.
    Type: Application
    Filed: July 29, 2022
    Publication date: August 22, 2024
    Applicant: CJ CHEILJEDANG CORPORATION
    Inventors: Yoo-Kyoung SHIM, Soyun PARK, Jeung Yil PARK, Jin Su CHUNG
  • Publication number: 20230392005
    Abstract: The present invention relates to a biodegradable plastic polyhydroxyalkanoate (PHA) composition having improved adhesive properties and mechanical properties, and a method for manufacturing same. Specifically, according to the present invention, it is possible to provide a composition having excellent adhesive properties with respect to a plastic material by improving the adhesive properties by means of a single component of biodegradable PHA without requiring additional chemical substances. In addition, it is possible to provide a composition of which mechanical properties as well as adhesive properties are improved. Therefore, it is possible to manufacture products which are eco-friendly and harmless to the human body, by easily applying the composition to products requiring biodegradable properties along with adhesive properties and mechanical properties.
    Type: Application
    Filed: October 21, 2021
    Publication date: December 7, 2023
    Inventors: Yoo Kyoung SHIM, Eun-Hye LEE, Dong-Eun CHANG
  • Publication number: 20230383119
    Abstract: The present invention relates to a polyhydroxyalkanoate (PHA) composition having improved stability and water resistance, and a preparation method therefor. According to the present invention, the aggregation of water-dispersed PHA particles can be prevented, and re-dispersion is induced so that precipitation can be prevented, and thus the dispersion stability and water resistance of PHA can be improved. In addition, the composition of the present invention minimizes the use of additives to enable recycling of biodegradable PHA, and has excellent compatibility with conventional commercial products and excellent room-temperature stability. Additionally, since overuse of a surfactant and an additional step of forming an emulsion are not required in the preparation of PHA, economic feasibility can be improved.
    Type: Application
    Filed: October 29, 2021
    Publication date: November 30, 2023
    Inventors: Yoo Kyoung SHIM, Eun-Hye LEE, Dong-Eun CHANG