Patents by Inventor Kyoung Won YIM

Kyoung Won YIM 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 producing polyamide with controlled activator addition, and polyamide produced thereby
    Patent number: 11814480
    Abstract: The present invention provides a method for producing a polyamide with controlled activator addition, and a polyamide produced thereby, the method allowing a polymerization conversion rate and a polydispersity index (PDI) to be enhanced by controlling the addition of an activator so as to prevent a gelation phenomenon that occurs during anionic polymerization.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: November 14, 2023
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon Lee, Do Kyoung Kim, Seung Hoe Do, Jin Seo Lee, Kyung Ho Kwon, Dae Hak Kim, Kyoung Won Yim
  • METHOD FOR PREPARING A COPOLYESTER
    Publication number: 20230357498
    Abstract: The present disclosure relates to a method for preparing a copolyester. More specifically, the present disclosure relates to a method for preparing a copolyester that reduces the use of a cobalt-based coloring agent but minimizes yellowing, by using a specific thermal stabilizer.
    Type: Application
    Filed: August 11, 2021
    Publication date: November 9, 2023
    Applicant: HANWHA SOLUTIONS CORPORATION
    Inventors: Eung Gyu KIM, Ho Seong NAM, Kyoung Won YIM, Ju Mi YUN
  • Method for producing polyamide by coordinated anionic ring-opening polymerization, and polyamide produced thereby
    Patent number: 11718713
    Abstract: The present invention relates to a method for producing a polyamide by coordinated anionic ring-opening polymerization and a polyamide produced thereby, wherein metal alkoxide as an initiator and metal hydride as a catalyst are added to enable polymerization having a narrow molecular weight distribution and uniform molecular weight within a short polymerization reaction time at a low temperature, without a separate vacuum process, as compared with an existing polymerization method.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: August 8, 2023
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon Lee, Dae Hak Kim, Seung Hoe Do, Jin Seo Lee, Kyung Ho Kwon, Kyoung Won Yim, Do Kyoung Kim
  • Lightweight sandwich steel sheet using polyamide, and manufacturing method therefor
    Patent number: 11433639
    Abstract: The present invention relates to a lightweight sandwich steel sheet using polyamide, and more particularly, to a lightweight sandwich steel sheet using polyamide and a manufacturing method therefor, the steel sheet being usable at a wider temperature range than that of a conventional sandwich steel sheet and, particularly, having excellent adhesion at a low temperature and remarkably increasing stability and lightweight property.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: September 6, 2022
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Dae Hak Kim, Seung Hoe Do, Jin Seo Lee, Kyoung Won Yim, Kyung Ho Kwon, Do Kyoung Kim, Hye Yeon Lee
  • METHOD FOR PREPARING POLYAMIDE BY USING MOLECULAR WEIGHT CONTROL AGENT HAVING DOUBLE ACTIVE GROUP, AND POLYAMIDE PREPARED THEREBY
    Publication number: 20210002424
    Abstract: Provided are a method for preparing a polyamide by using a molecular weight controller having a double active group in anionic ring-opening copolymerization of a polyamide, thereby enabling molecular weight to be controlled through the addition reaction of the molecular weight controller, and a polyamide prepared thereby.
    Type: Application
    Filed: October 29, 2018
    Publication date: January 7, 2021
    Applicant: HANWHA SOLUTIONS CORPORATION
    Inventors: Do Kyoung KIM, Jin Seo LEE, Kyung Ho KWON, Seung Hoe DO, Hye Yeon LEE, Kyoung Won YIM, Dae Hak KIM
  • METHOD FOR PRODUCING POLYAMIDE USING TERMINAL ENCAPSULANT AND POLYAMIDE PRODUCED THEREBY
    Publication number: 20200385520
    Abstract: Provided are a method for producing a polyamide using an end-capping agent and a polyamide produced thereby, wherein the method is an eco-friendly process method without using a solvent as a catalyst and may prepare, by using an end-capping agent for suppressing side reaction, a polymer having a uniform molecular weight and a high conversion rate at a low temperature within a short polymerization time in comparison with a conventional polymerization method.
    Type: Application
    Filed: October 29, 2018
    Publication date: December 10, 2020
    Applicant: HANWHA SOLUTIONS CORPORATION
    Inventors: Kyoung Won YIM, Seung Hoe DO, Jin Seo LEE, Hye Yeon LEE, Dae Hak KIM, Do Kyoung KIM, Kyung Ho KWON
  • LIGHTWEIGHT SANDWICH STEEL SHEET USING POLYAMIDE, AND MANUFACTURING METHOD THEREFOR
    Publication number: 20200384725
    Abstract: The present invention relates to a lightweight sandwich steel sheet using polyamide, and more particularly, to a lightweight sandwich steel sheet using polyamide and a manufacturing method therefor, the steel sheet being usable at a wider temperature range than that of a conventional sandwich steel sheet and, particularly, having excellent adhesion at a low temperature and remarkably increasing stability and lightweight property.
    Type: Application
    Filed: November 1, 2018
    Publication date: December 10, 2020
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Dae Hak KIM, Seung Hoe DO, Jin Seo LEE, Kyoung Won YIM, Kyung Ho KWON, Do Kyoung KIM, Hye Yeon LEE
  • METHOD FOR PRODUCING POLYAMIDE COMPRISING AMIDE-BASED MOLECULAR WEIGHT MODIFIER, AND POLYAMIDE PRODUCED THEREBY
    Publication number: 20200385521
    Abstract: Provided are a method for producing a polyamide including an amide-based molecular weight controller and a polyamide produced thereby, wherein the amide-based molecular weight controller may easily control the molecular weight of the polyamide to have a narrow molecular weight distribution so as to prevent an increase in the molecular weight due to a basic intermediate produced in anionic polymerization and a side reaction generated under a high-temperature polymerization condition.
    Type: Application
    Filed: October 30, 2018
    Publication date: December 10, 2020
    Applicant: HANWHA SOLUTIONS CORPORATION
    Inventors: Kyung Ho KWON, Seung Hoe DO, Jin Seo LEE, Dae Hak KIM, Kyoung Won YIM, Do Kyoung KIM, Hye Yeon LEE
  • METHOD FOR PRODUCING POLYAMIDE WITH CONTROLLED ACTIVATOR ADDITION, AND POLYAMIDE PRODUCED THEREBY
    Publication number: 20200277438
    Abstract: The present invention provides a method for producing a polyamide with controlled activator addition, and a polyamide produced thereby, the method allowing a polymerization conversion rate and a polydispersity index (PDI) to be enhanced by controlling the addition of an activator so as to prevent a gelation phenomenon that occurs during anionic polymerization.
    Type: Application
    Filed: October 29, 2018
    Publication date: September 3, 2020
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon LEE, Do Kyoung KIM, Seung Hoe DO, Jin Seo LEE, Kyung Ho KWON, Dae Hak KIM, Kyoung Won YIM
  • METHOD FOR PRODUCING POLYAMIDE BY COORDINATED ANIONIC RING-OPENING POLYMERIZATION, AND POLYAMIDE PRODUCED THEREBY
    Publication number: 20200277439
    Abstract: The present invention relates to a method for producing a polyamide by coordinated anionic ring-opening polymerization and a polyamide produced thereby, wherein metal alkoxide as an initiator and metal hydride as a catalyst are added to enable polymerization having a narrow molecular weight distribution and uniform molecular weight within a short polymerization reaction time at a low temperature, without a separate vacuum process, as compared with an existing polymerization method.
    Type: Application
    Filed: October 29, 2018
    Publication date: September 3, 2020
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Hye Yeon LEE, Dae Hak KIM, Seung Hoe DO, Jin Seo LEE, Kyung Ho KWON, Kyoung Won YIM, Do Kyoung KIM
  • METHOD FOR PREPARING POLYAMIDE BY ANION RING-OPENING POLYMERIZATION AND POLYAMIDE PREPARED THEREBY
    Publication number: 20200270397
    Abstract: Provided is a method for preparing a polyamide by an anionic polymerization reaction, wherein lactam, and based on 100 parts by weight of the entire lactam, 0.01 parts by weight to 20 parts by weight of an alkali metal as an initiator, 0.3 parts by weight to 10 parts by weight of a molecular weight controller, and 0.002 parts by weight to 1.0 part by weight of carbon dioxide as an activator may be included.
    Type: Application
    Filed: November 5, 2018
    Publication date: August 27, 2020
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Seung Hoe DO, Jin Seo LEE, Kyung Ho KWON, Do Kyoung KIM, Hye Yeon LEE, Kyoung Won YIM