Patents by Inventor Ji-Sang Jeong

Ji-Sang Jeong 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: 20230187640
    Abstract: Provided is a novel binder for a secondary battery including a copolymer for a binder for a secondary battery containing specific repeating units. A negative electrode manufactured by mixing the binder with a negative electrode active material and a secondary battery including the negative electrode have excellent mechanical properties and an improved binding force, thereby effectively suppressing exfoliation and desorption of the negative electrode and expansion of the negative electrode even when a silicon-based negative electrode active material is used, and providing a negative electrode for a secondary battery having improved charge/discharge cycle characteristics and battery performance, and a secondary battery including the same.
    Type: Application
    Filed: December 9, 2022
    Publication date: June 15, 2023
    Inventors: Jun Soo Son, Gwi Ok Park, Seok Keun Yoo, Min Kyung Seon, Ji Sang Jeong, Ju Ho Chung
  • Publication number: 20230127580
    Abstract: Provided are a binder for a secondary battery, a negative electrode including the same, and a secondary battery including the same. More particularly, the binder for a secondary battery including a crosslinked product of a copolymer with a silane-based crosslinking agent according to the present invention may have excellent thermal resistance and mechanical properties and effectively improve a binding force, and the negative electrode for a secondary battery and the secondary battery including the same may effectively suppress expansion of a negative electrode to improve charge/discharge cycle characteristics and performance of the secondary battery.
    Type: Application
    Filed: October 20, 2022
    Publication date: April 27, 2023
    Inventors: Dong Gun Lee, Gwi Ok Park, Seok Keun Yoo, Min Kyung Seon, Ji Sang Jeong, Ju Ho Chung, Jun Soo Son
  • Publication number: 20220173400
    Abstract: The present invention relates to a binder for an anode for a secondary battery, an anode including the binder, and a secondary battery including the anode. More particularly, the present invention relates to a binder for an anode for a secondary battery that has excellent heat resistance and mechanical properties and an improved binding force because a copolymer is used for the binder, and an anode for a secondary battery. In addition, expansion and shrinkage of the anode may be efficiently suppressed, such that charge and discharge life characteristics and performance of the secondary battery may be improved.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 2, 2022
    Inventors: Joon-Sup Kim, Gwi Ok Park, Ji Sang Jeong, Min Kyung Seon, Dong Gun Lee, Sun Young Kim
  • Publication number: 20210095083
    Abstract: Provided are a polyimide-based film and a display device including the same. More particularly, a polyimide-based film having an excellent press characteristic and a display device including the same are provided. As an exemplary embodiment, a polyimide-based film is provided, wherein when a load is applied to a surface of the film with an Erichsen pen, a maximum load satisfies the following Relation 1: 0.07 ? F e T e ? 0.11 [ Relation ? ? 1 ] wherein Fe is a maximum load (N) at which when a load is applied to the surface of the polyimide-based film with the Erichsen pen, the surface is not scratched, and Te is a thickness (?m) of the polyimide-based film.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 1, 2021
    Inventors: Sang Yoon Park, Hye Ri Kim, Ji Sang Jeong
  • Publication number: 20210024707
    Abstract: Provided is a polyamideimide film which has an excellent uniformity of a birefringence value and may provide excellent display quality.
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Hye Ri Kim, Min Sang Park, Sang Yoon Park, Ji Sang Jeong
  • Patent number: 9028971
    Abstract: The present invention relates to a paper coating latex comprising 0.001-10 weight part of cyclo-oligosaccharide compound to 100 weight part of styrene-butadiene latex and a paper coating composition containing the same, and according to the present invention, latex petrochemical odors generated during the coating processes by non-reacted monomers and volatile organic compounds remaining in the latex can be eliminated without reducing polymerization productivity and latex stability.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: May 12, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Jung-su Han, Chang-sun Han, Ho-yeul Choi, Seung-hun Yang, Ji-sang Jeong
  • Patent number: 8674000
    Abstract: Disclosed are paper coating latex, a method for preparing the same, and paper coating composition containing the same, characterized in that in the paper coating latex having a core-shell structure, the core is formed by the polymerization of monomer mixtures comprising 5 to 10 weight parts of ethylene unsaturated acid based on 100 weight parts of the core, wherein the amount of ethylene unsaturated acid in the shell is less than that in the core, and the shell has glass transition temperature up to room temperature, lower than that of the core. The present invention has an effect of providing a high quality matte coated paper that has excellent printability such as ink drying rate, adhesion, etc., as well as low white paper gloss and improved print gloss by coating paper coating composition containing multi-layered paper coating latex having high swelling and contraction property on paper.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: March 18, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Dae-Ho Lee, Ji-Sang Jeong, Chang-Sun Han
  • Publication number: 20120328981
    Abstract: Disclosed is a preparation method for a toner. Problems according to use of a surfactant can be solved and it is possible to prepare toner particles having a uniform distribution of particle size by using an alkali-soluble resin containing an acidic group.
    Type: Application
    Filed: February 16, 2011
    Publication date: December 27, 2012
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Il Hyuk Kim, Ji Sang Jeong, Ha Na Jung, Sung Hwa Lee, Kyung Gyol Yon
  • Publication number: 20120028182
    Abstract: A toner having a core-shell structure and a method of preparing the same. Since a shell includes a crosslinked resin, a toner preventing hot offsets and having excellent charge stability is prepared.
    Type: Application
    Filed: January 26, 2010
    Publication date: February 2, 2012
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Ji Sang Jeong, Il Hyuk Kim, Dong Won Kim, Ha Na Jung, Kyung Gyol Yon
  • Patent number: 8053045
    Abstract: The present invention relates to a styrene-butadiene latex, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper containing ethylenically unsaturated monomer by 0.1-1.5 weight parts with lowering surface negative charge density, a preparation method thereof and a coating liquid containing the same. The present invention provides a coating liquid for ink-jet paper having excellent price competitiveness and coating work-ability and at the same time reducing energy cost for drying process and thereby provides an ink-jet paper with excellent printing quality.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: November 8, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Ho-Yeul Choi, Ji-Sang Jeong, Dae-Ho Lee, Sang-Gil Lee, Hak-lae Lee, Chang-sun Han
  • Publication number: 20110014402
    Abstract: The present invention relates to a styrene-butadiene latex, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper containing ethylenically unsaturated monomer by 0.1-1.5 weight parts with lowering surface negative charge density, a preparation method thereof and a coating liquid containing the same. The present invention provides a coating liquid for ink-jet paper having excellent price competitiveness and coating work-ability and at the same time reducing energy cost for drying process and thereby provides an ink-jet paper with excellent printing quality.
    Type: Application
    Filed: December 4, 2007
    Publication date: January 20, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Ho-Yeul Choi, Ji-Sang Jeong, Dae-Ho Lee, Sang-Gil Lee, Hak-lae Lee, Chang-sun Han
  • Publication number: 20080097019
    Abstract: Disclosed are paper coating latex, a method for preparing the same, and paper coating composition containing the same, characterized in that in the paper coating latex having a core-shell structure, the core is formed by the polymerization of monomer mixtures comprising 5 to 35 weight parts of ethylene unsaturated acid based on 100 weight parts of the core and the shell has glass transition temperature up to room temperature, lower than that of the core. The present invention has an effect of providing a high quality matte coated paper that has excellent printability such as ink drying rate, adhesion, etc., as well as low white paper gloss and improved print gloss by coating paper coating composition containing multi-layered paper coating latex having high swelling and contraction property on paper.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 24, 2008
    Applicant: LG Chem, Ltd.
    Inventors: Dae-Ho Lee, Ji-Sang Jeong, Chang-Sun Han
  • Publication number: 20070049662
    Abstract: The present invention relates to a paper coating latex and a paper coating composition containing the same, and more precisely, a paper coating latex comprising 0.001-10 weight part of cyclo-oligosaccharide compound to 100 weight part of styrene-butadiene latex and a paper coating composition containing the same. According to the present invention, latex petrochemical odors generated during coating processes by non-reacted monomers and volatile organic compounds remaining in the latex can be eliminated without reducing polymerization productivity and latex stability. Therefore, the present invention provides an odorless paper coating latex, a paper coating composition containing the paper coating latex and an inorganic pigment, and a paper coated with the paper coating composition.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 1, 2007
    Inventors: Jung-su Han, Chang-sun Han, Ho-yeul Choi, Seung-hun Yang, Ji-sang Jeong