Patents by Inventor Keu Yeun Park

Keu Yeun Park 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: 20230149971
    Abstract: A gravure coater test apparatus includes a gravure roll and a backup roll which are circumscribed to each other, a motor which drives the gravure roll partially submerged in a water-based pressure-sensitive adhesive for coating, a controller which adjusts the rotational speed of the motor, a doctor blade which is selected from a plurality of types to scrape the water-based pressure-sensitive adhesive from the surface of the gravure roll being rotated, and an infrared analyzer which allows at least one of the type of the water-based pressure-sensitive adhesive corresponding to the selected doctor blade, the uniformity of the coating surface, and the amount of the coated water-based pressure-sensitive adhesive to be confirmed.
    Type: Application
    Filed: April 6, 2021
    Publication date: May 18, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Sungjong Seo, Keu Yeun Park, Seung Hun Yang, Seungmo Lee
  • Patent number: 11613677
    Abstract: A water-based acrylic pressure-sensitive adhesive for clothing and a preparation method thereof are provided. Since a specific internal crosslinking agent is used in a predetermined range during polymerization of an acrylic emulsion resin, a glass transition temperature and an internal crosslinking degree may be controlled while maintaining physical properties of the resin equal to those of the existing adhesives, and thus a residual ratio of the pressure-sensitive adhesive may be greatly reduced at the time of removing the pressure-sensitive adhesive from a substrate such as a fabric for clothing, etc.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: March 28, 2023
    Inventors: Sungjong Seo, Jung Sup Han, Hyunju Cho, Kumhyoung Lee, Keu Yeun Park, Jungeun Yeo
  • Patent number: 11525019
    Abstract: A process for preparing an acrylic emulsion resin is provided by introducing specific monomers at a certain time during an emulsion polymerization process, dispersion stability and adhesion properties of the acrylic emulsion resin are improved, thereby providing an aqueous acrylic pressure-sensitive adhesive that not only has excellent initial adhesion but also has low viscosity and improved processability, and high adhesion holding power.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 13, 2022
    Inventors: Seungmo Lee, Seung Hun Yang, Jungeun Woo, Keu Yeun Park, Jungeun Yeo
  • Publication number: 20220363959
    Abstract: An acrylic emulsion pressure-sensitive adhesive composition is provided. More particularly, an acrylic emulsion pressure-sensitive adhesive composition that may become easily removable when being impregnated with water in a water-borne removal process while being able to realize excellent tacky/adhesive strength for a substrate to be adhered is provided.
    Type: Application
    Filed: September 29, 2020
    Publication date: November 17, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Hye Soo Han, Seung Hun Yang, Hyunju Cho, Kumhyoung Lee, Keu Yeun Park, Seungmo Lee, Sungjong Seo, Jungeun Yeo
  • Publication number: 20210230463
    Abstract: A method for preparing an aqueous acrylic pressure-sensitive adhesive for clothing is provided, which maintains aging peel strength even when stored at a high temperature for a long time and has greatly improved residue properties when the adhesive is removed from clothing fabrics, and the like. An aqueous acrylic pressure-sensitive adhesive for clothing including the composition prepared as above is also provided.
    Type: Application
    Filed: October 31, 2019
    Publication date: July 29, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Sungjong Seo, Seung Hun Yang, Hyunju Cho, Keu Yeun Park, Jungeun Yeo
  • Publication number: 20210122845
    Abstract: A process for preparing an acrylic emulsion resin is provided by introducing specific monomers at a certain time during an emulsion polymerization process, dispersion stability and adhesion properties of the acrylic emulsion resin are improved, thereby providing an aqueous acrylic pressure-sensitive adhesive that not only has excellent initial adhesion but also has low viscosity and improved processability, and high adhesion holding power.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 29, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Seungmo Lee, Seung Hun Yang, Jungeun Woo, Keu Yeun Park, Jungeun Yeo
  • Publication number: 20200199414
    Abstract: A water-based acrylic pressure-sensitive adhesive for clothing and a preparation method thereof are provided. Since a specific internal crosslinking agent is used in a predetermined range during polymerization of an acrylic emulsion resin, a glass transition temperature and an internal crosslinking degree may be controlled while maintaining physical properties of the resin equal to those of the existing adhesives, and thus a residual ratio of the pressure-sensitive adhesive may be greatly reduced at the time of removing the pressure-sensitive adhesive from a substrate such as a fabric for clothing, etc.
    Type: Application
    Filed: December 7, 2018
    Publication date: June 25, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sungjong Seo, Jung Sup Han, Hyunju Cho, Kumhyoung Lee, Keu Yeun Park, Jungeun Yeo