Patents by Inventor Dong-Jo Ryu

Dong-Jo Ryu 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: 20210151760
    Abstract: The present invention relates to a negative electrode slurry composition including a negative electrode active material; a hydrophobically modified alkali-swellable emulsion; and a solvent, and a negative electrode and a secondary battery, manufactured using the same.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 20, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Cheol Hoon Choi, Seon Hee Han, Min Ah Kang, Hye Soo Han, Dong Jo Ryu
  • Publication number: 20210036326
    Abstract: Provided are a binder composition for a secondary battery and an electrode mixture including the same. More particularly, provided are a binder composition for a secondary battery, the binder composition having excellent characteristics of binding strength, mechanical properties, etc., while maintaining structural stability of an electrode even after repeated charge/discharge cycles, thereby improving performances of a secondary battery, and an electrode mixture including the same.
    Type: Application
    Filed: November 1, 2019
    Publication date: February 4, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung Sup Han, Dong Jo Ryu, Seon Hee Han, Jeong Man Son, Min Ah Kang, Cheolhoon Choi
  • Publication number: 20200411872
    Abstract: Provided are a binder composition for a secondary battery electrode, and an electrode mixture including the same, and more particularly, a binder composition for a secondary battery electrode capable of providing excellent binding strength for an active material and an electrode while having excellent latex stability, thereby improving performance of a secondary battery, and an electrode mixture including the same.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 31, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Seon Hee Han, Min Ah Kang, Dong Jo Ryu, Jung Sup Han, Jeong Man Son, Cheolhoon Choi
  • Patent number: 10862126
    Abstract: The present invention relates to a binder composition for a secondary battery, including: a copolymer having a functional group; and an alkali metal ion bound to the functional group of the copolymer or with which a constituent element of the functional group is substituted. The binder composition exhibits enhanced adhesive strength and also exhibits low resistance due to the alkali metal ion included in the copolymer, and thus may exhibit more stable electrochemical performance.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: December 8, 2020
    Inventors: Min Ah Kang, Dong Jo Ryu, Seon Hee Han, Cheol Hoon Choi, Hye Soo Han
  • Patent number: 10745500
    Abstract: The present disclosure relates to a preparation method for an acrylic acid-based polymer. According to the preparation method for an acrylic acid-based polymer of the present disclosure, unreacted monomers may be reduced and a high quality acrylic acid-based polymer can be prepared. In addition, it is not necessary to increase the time or the temperature in the polymerization step or the aging step, thereby maintaining the high productivity.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: August 18, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Jung Sup Han, Young Sam Kim, Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Publication number: 20200194792
    Abstract: The present invention relates to a binder composition for a secondary battery, an electrode slurry composition including the same, and an electrode and a secondary battery manufactured by using the same, the binder composition including: a latex particle (A) which is a polymer of a monomer mixture including (a1) a conjugated diene monomer, (a2) an ethylenically unsaturated carboxylic acid monomer, and (a3) an aromatic vinyl monomer; and an emulsifier (B), wherein the (a2) ethylenically unsaturated carboxylic acid monomer is included in an amount of 3 parts by weight or more based on 100 parts by weight of the monomer mixture and the emulsifier (B) is included in an amount of less than 3000 ppm based on 100 parts by weight of the latex particles.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 18, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Hye Soo Han, Seon Hee Han, Min Ah Kang, Cheol Hoon Choi, Dong Jo Ryu
  • Patent number: 10449515
    Abstract: Disclosed herein is a method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid including a) providing a superabsorbent resin; b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); and c) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a).
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: October 22, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Young-Sam Kim, Yeon-Woo Hong, Dong-Jo Ryu
  • Patent number: 10418632
    Abstract: Disclosed is a binder composition for secondary batteries, wherein conjugated diene latex particles (A) having an average particle diameter of 50 nm or more and 200 nm or less and acrylic copolymer latex particles (B) having an average particle diameter of 300 nm or more and 700 nm or less are present as an independent phases, and the acrylic copolymer latex particles (B) are included in an amount of 1% to 30% by weight based on a mass of a solid. When the binder composition according to the present invention is applied to an electrode mixture and lithium secondary battery, superior binding force may be maintained between electrode materials and between an electrode material and a current collector, which suffer volume change during charge/discharge, and a secondary battery having superior initial capacity and efficiency may be provided. In addition, thickness increase and gas generation are decreased at high temperature and thus swelling is decreased, whereby a battery having enhanced safety may be provided.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: September 17, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Eun Joo Park, Dong Jo Ryu, Min Ah Kang
  • Publication number: 20190218433
    Abstract: An adhesive composition characterized in that the kisstack, which is defined as the force measured when a sheet coated with the adhesive composition is instantaneously peeled off after being attached, is about 6 N/inch or higher. The composition not only has excellent loop tack but also exhibits high kisstack characteristics, and thus can be widely used for various substrates.
    Type: Application
    Filed: December 21, 2017
    Publication date: July 18, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
  • Publication number: 20190127277
    Abstract: The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.
    Type: Application
    Filed: December 8, 2017
    Publication date: May 2, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Publication number: 20190085102
    Abstract: A cyanoethyl group-containing polymer and a preparation method thereof are provided. The cyanoethyl group-containing polymer is characterized by having very low contents of functional groups other than cyanoethyl groups.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 21, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Hye Soo Han, Min Ah Kang, Kyung An Kwon, Dong Jo Ryu, Seon Hee Han, Cheol Hoon Choi
  • Patent number: 10208171
    Abstract: Provided are a preparation method of a superabsorbent polymer, and a superabsorbent polymer prepared thereby. The preparation method of the superabsorbent polymer according to the present disclosure enables preparation of the superabsorbent polymer which is excellent in absorption properties such as centrifuge retention capacity and absorbency under pressure, and also has improved permeability. In addition, the preparation method exhibits excellent operability during the preparation (in particular, surface crosslinking of the polymer) and excellent productivity due to low production of coarse particles and fine particles.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: February 19, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Yong Hun Lee, Chang Sun Han, Hye Mi Nam, Dong Jo Ryu, Hyemin Lee
  • Publication number: 20190009250
    Abstract: Disclosed herein is a method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid including a) providing a superabsorbent resin; b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); and c) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a).
    Type: Application
    Filed: September 13, 2018
    Publication date: January 10, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Young-Sam Kim, Yeon-Woo Hong, Dong-Jo Ryu
  • Publication number: 20180351177
    Abstract: The present invention relates to a binder composition for a secondary battery, including: a copolymer having a functional group; and an alkali metal ion bound to the functional group of the copolymer or with which a constituent element of the functional group is substituted. The binder composition exhibits enhanced adhesive strength and also exhibits low resistance due to the alkali metal ion included in the copolymer, and thus may exhibit more stable electrochemical performance.
    Type: Application
    Filed: December 22, 2016
    Publication date: December 6, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Min Ah Kang, Dong Jo Ryu, Seon Hee Han, Cheol Hoon Choi, Hye Soo Han
  • Patent number: 10124316
    Abstract: Disclosed herein is a superabsorbent polymer with a surface modified with both a polyvalent cationic salt and a polycarbonic acid-based copolymer, which is able to effectively absorb blood or highly viscous liquid, and a method for preparing the same.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: November 13, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Young-Sam Kim, Yeon-Woo Hong, Dong-Jo Ryu
  • Patent number: 10112176
    Abstract: Disclosed herein is a superabsorbent polymer with a surface modified with both a water-soluble polyvalent cationic salt and a polycarbonic acid-based copolymer, wherein an improvement is brought about in processability without significant degradation of other properties and a method is provided for preparing the surface-modified superabsorbent polymer.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: October 30, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Young-Sam Kim, Yeon-Woo Hong, Dong-Jo Ryu
  • Publication number: 20180298126
    Abstract: The present disclosure relates to a preparation method for an acrylic acid-based polymer. According to the preparation method for an acrylic acid-based polymer of the present disclosure, unreacted monomers may be reduced and a high quality acrylic acid-based polymer can be prepared. In addition, it is not necessary to increase the time or the temperature in the polymerization step or the aging step, thereby maintaining the high productivity.
    Type: Application
    Filed: January 12, 2017
    Publication date: October 18, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jung Sup Han, Young Sam Kim, Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Patent number: 10100160
    Abstract: Disclosed herein is a superabsorbent polymer with a surface crosslinked with a water-soluble polyvalent cationic salt, a polycarbonic acid-based copolymer, and a surface crosslinking agent wherein an improvement is brought about in physical properties, with the concomitant reduction of process time and cost. Also, a method is provided for preparing the surface-crosslinked superabsorbent polymer.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: October 16, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Young-Sam Kim, Yeon-Woo Hong, Dong-Jo Ryu
  • Publication number: 20180265653
    Abstract: Provided are a preparation method of a superabsorbent polymer, and a superabsorbent polymer prepared thereby. The preparation method of the superabsorbent polymer according to the present disclosure enables preparation of the superabsorbent polymer which is excellent in absorption properties such as centrifuge retention capacity and absorbency under pressure, and also has improved permeability. In addition, the preparation method exhibits excellent operability during the preparation (in particular, surface crosslinking of the polymer) and excellent productivity due to low production of coarse particles and fine particles.
    Type: Application
    Filed: May 21, 2018
    Publication date: September 20, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Yong Hun Lee, Chang Sun Han, Hye Mi Nam, Dong Jo Ryu, Hyemin Lee
  • Patent number: 10044041
    Abstract: Disclosed are a binder with a core-shell structure for a secondary battery electrode, and a secondary battery including the same, wherein the core includes styrene-butadiene rubber (SBR), the shell includes a copolymer of two or more monomers selected from the group consisting of a conjugated diene-based monomer, a (meth)acrylic ester-based monomer, an acrylate-based monomer, a vinyl-based monomer, a nitrile-based monomer, and an ethylenically unsaturated carboxylic acid monomer, and the binder includes a functional group providing binding capacity to surfaces of the SBR particles. Such a binder provides excellent adhesive strength and elasticity and, thus, overall performance of a secondary battery including the same may be improved.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: August 7, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Eun Joo Park, Min Ah Kang, Dong Jo Ryu