Patents by Inventor Houng Sik YOO

Houng Sik YOO 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: 20200358064
    Abstract: A slurry composition for coating a secondary battery separator, a separator prepared using the same, and a secondary battery including the separator, wherein the slurry composition includes a phenolic compound including two or more aromatic rings, inorganic particles, a binder, and a solvent.
    Type: Application
    Filed: December 5, 2018
    Publication date: November 12, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Gye Min KWON, Houng Sik YOO, Hyeon CHOI, Da Kyung HAN, Je An LEE
  • Publication number: 20200295347
    Abstract: A method of preparing a slurry composition for a secondary battery positive electrode includes preparing a positive electrode active material pre-dispersion by mixing a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, and preparing a slurry for a positive electrode by further mixing a conductive agent, a binder, and an additional solvent with the positive electrode active material pre-dispersion is provided. A positive electrode for a secondary battery which is prepared by using the same method, and a lithium secondary battery including the positive electrode are also provided.
    Type: Application
    Filed: March 22, 2018
    Publication date: September 17, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Hoon Ahn, Houng Sik Yoo, Gye Min Kwon, Sang Hoon Choy
  • Publication number: 20200259162
    Abstract: A negative electrode slurry composition including (1) clay particles having, a plate-type structure and an average particle diameter (D50) of 10 nm to 2 ?m, (2) carboxymethylcellulose (CMC), (3) a negative electrode active material, and (4) an aqueous solvent, wherein a weight ratio of the carboxymethylcellulose and the clay particles is 9.5:0.5 to 4:6. The negative electrode slurry composition is capable of solving problems due to the deterioration of storage stability and dispersibility of solids in a negative electrode slurry composition haying a high solid content.
    Type: Application
    Filed: November 6, 2018
    Publication date: August 13, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jong Won LEE, Houng Sik YOO, Hyeon CHOI
  • Patent number: 10741829
    Abstract: The present invention provides a composition for forming a positive electrode of a secondary battery which includes a positive electrode active material, a conductive material, and a dispersing agent, in which the conductive material includes a carbon-based material having a specific surface area of 130 m2/g or more and an oil absorption number of 220 ml/100 g or more at 0.1 wt % to 2 wt % with respect to the total weight of the composition for forming a positive electrode, and the dispersing agent is introduced into the conductive material to form a conductive material-dispersing agent composite, and the conductive material-dispersing agent composite has a particle size distribution D50 of 0.8 ?m to 1.2 ?m, a positive electrode for a secondary battery and a secondary battery, which are manufactured using the same.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: August 11, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Byoung Hoon Ahn, Sang Hoon Choy, Houng Sik Yoo, Ki Won Sung
  • Patent number: 10693124
    Abstract: The present invention provides a composition for forming a positive electrode of a secondary battery which includes a positive electrode active material, a conductive material, and a dispersing agent, in which the conductive material includes a carbon-based material having a specific surface area of 130 m2/g or more and an oil absorption number of 220 ml/100 g or more at 0.1 wt % to 2 wt % with respect to the total weight of the composition for forming a positive electrode, and the dispersing agent is introduced into the conductive material to form a conductive material-dispersing agent composite, and the conductive material-dispersing agent composite has a particle size distribution D50 of 0.8 ?m to 1.2 ?m, a positive electrode for a secondary battery and a secondary battery, which are manufactured using the same.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: June 23, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Byoung Hoon Ahn, Sang Hoon Choy, Houng Sik Yoo, Ki Won Sung
  • Patent number: 10655003
    Abstract: The present invention relates to a resin blend for a melting process, to a method for manufacturing a resin molding using same, and to a resin molding obtained thereby, the resin blend comprising a first resin and a second resin, wherein the second resin includes a polymer resin having at least one organic functional group selected from the group consisting of an alkyl group having 2 to 20 carbon atoms, an alicyclic ring having 5 to 40 carbon atoms and an aromatic ring having 6 to 40 carbon atoms, and has, with the first resin, a melt viscosity difference of 0.1 to 3,000 Pa*s at a shear rate of 100 to 1,000 s?1 and a processing temperature of the resin mixture, and a glass transition temperature (Tg) difference of 10° C. to 150° C.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: May 19, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Houng Sik Yoo, Jin Young Ryu, Hak Shin Kim, Eun Joo Choi, Young Jun Hong, Hyun Seok Yang
  • Patent number: 10655002
    Abstract: Provided are a resin blend for forming a layer-separated structure, a pellet, a method of preparing a resin article using the same and a resin article. The resin blend may include a first resin, and a second resin that comprises a resin to which at least one organic functional group selected from the group consisting of an alkyl group having 2 to 20 carbon atoms, an alicyclic group having 5 to 40 carbon atoms and an aromatic group having 6 to 40 carbon atoms is introduced, that has a difference in melt viscosity from the first resin of 0.1 to 3000 pa*s at a shear rate of 100 to 1000 s?1 and a processing temperature of the resin blend, and that has a difference in glass transition temperature from the first resin of 10° C. to 150° C. The resin blend can improve mechanical and surface characteristics of a resin article.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: May 19, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Houng Sik Yoo, Jin Young Ryu, Hak Shin Kim, Eun Joo Choi, Young Jun Hong, Hyun Seok Yang
  • Patent number: 10590248
    Abstract: The present invention relates to a PDMS-polyurethane film for displays, which has a dielectric constant/elastic modulus value of 2 to 15 mm2/N, and a production method thereof.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: March 17, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Jong-Won Lee, Hyeon Choi, Houng-Sik Yoo
  • Publication number: 20200028174
    Abstract: The present invention relates to a positive electrode active material pre-dispersion composition which includes a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, wherein the dispersant includes a hydrogenated nitrile butadiene rubber (HNBR), a slurry composition for a secondary battery positive electrode which is prepared by using the positive electrode active material pre-dispersion composition, a positive electrode for a secondary battery, and a lithium secondary battery including the positive electrode.
    Type: Application
    Filed: March 22, 2018
    Publication date: January 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Hoon Ahn, Houng Sik Yoo, Chang Wan Koo, Hyun Chul Ha, Sang Hoon Choy, Jong Won Lee, Dong Hyun Kim, Gye Min Kwon
  • Patent number: 10414888
    Abstract: The present invention relates to a polyurethane film for displays, which has high dielectric constant and low modulus characteristics and a dielectric constant/elastic modulus value of 2 to 15 mm2/N, and a production method thereof.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: September 17, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Jong-Won Lee, Hyeon Choi, Houng-Sik Yoo
  • Publication number: 20180233734
    Abstract: The present invention provides a composition for forming a positive electrode of a secondary battery which includes a positive electrode active material, a conductive material, and a dispersing agent, in which the conductive material includes a carbon-based material having a specific surface area of 130 m2/g or more and an oil absorption number of 220 ml/100g or more at 0.1 wt % to 2 wt % with respect to the total weight of the composition for forming a positive electrode, and the dispersing agent is introduced into the conductive material to form a conductive material-dispersing agent composite, and the conductive material-dispersing agent composite has a particle size distribution D50 of 0.8 ?m to 1.2 ?m, a positive electrode for a secondary battery and a secondary battery, which are manufactured using the same.
    Type: Application
    Filed: March 24, 2017
    Publication date: August 16, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Hoon Ahn, Sang Hoon Choy, Houng Sik Yoo, Ki Won Sung
  • Patent number: 10035902
    Abstract: Provided are a resin blend for melt processing, a pellet and a method of preparing a resin article using the same. The resin blend may include a first resin, and a second resin having a difference in melt viscosity from the first resin of 0.1 to 3000 pa*s at a shear rate of 100 to 1000 s?1 and a processing temperature of the resin blend. The resin blend can improve mechanical and surface characteristics of a resin article. Further, since coating or plating is not required for manufacturing a resin article, a manufacturing time and/or cost can be reduced, and productivity can be increased.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: July 31, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jin Young Ryu, Houng Sik Yoo, Hak Shin Kim, Young Jun Hong, Chong Kyu Shin, Eun Joo Choi
  • Publication number: 20180179351
    Abstract: The present invention relates to a polyurethane film for displays, which has high dielectric constant and low modulus characteristics and a dielectric constant/elastic modulus value of 2 to 15 mm2/N, and a production method thereof.
    Type: Application
    Filed: September 22, 2016
    Publication date: June 28, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jong-Won Lee, Hyeon Choi, Houng-Sik Yoo
  • Publication number: 20180179350
    Abstract: The present invention relates to a PDMS-polyurethane film for displays, which has a dielectric constant/elastic modulus value of 2 to 15 mm2/N, and a production method thereof.
    Type: Application
    Filed: September 22, 2016
    Publication date: June 28, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jong-Won Lee, Hyeon Choi, Houng-Sik Yoo
  • Patent number: 9650510
    Abstract: Provided are a resin blend including a first resin, and a second resin having a hydrophobic moiety represented by Formula 1 at a main chain and having a difference in surface energy from the first resin at 25° C. of 0.1 to 20 mN/m, and formed in a layer-separated structure, a pellet, a method of manufacturing the same, and a resin molded article having a specific layer-separated structure. Because of the resin blend, a molded product may have enhanced mechanical properties and surface hardness, and additional surface coating may be omitted, thereby reducing a processing time, increasing productivity, and reducing production costs.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: May 16, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Eun Joo Choi, Jin Young Ryu, Woo Sung Kim, Houng Sik Yoo, Han Na Lee, Hyeon Choi
  • Patent number: 9650511
    Abstract: Provided is a resin blend including a first resin and a second resin, the second resin having a hydrophobic functional group in a side chain and having a surface energy difference of 0.1 to 20 mN/m from the first resin at 25° C., wherein the resin blend is capable of forming a layer separation structure. Also, provided are a pellet, a method for preparing the same, and a resin molding article having a specific layer separation structure. The resin blend may not only improve mechanical properties and surface hardness of the molding article but also shorten process time, increase productivity and reduce production cost by omitting an additional surface coating step.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: May 16, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Houng Sik Yoo, Jin Young Ryu, Woo Sung Kim, Han Na Lee, Eun Joo Choi, Hyeon Choi
  • Patent number: 9644086
    Abstract: Provided are a resin blend for melt processing, a pellet and a method of preparing a resin article using the same. The resin blend may include a first resin, and a second resin having a difference in solubility parameter from the first resin at 25° C. of 0.001 to 10 (J/cm3)1/2. The resin blend can improve mechanical and surface characteristics of a resin article. Further, since coating or plating is not required for manufacturing a resin article, a manufacturing time and/or cost can be reduced, and productivity can be increased.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: May 9, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Jin Young Ryu, Houng Sik Yoo, Hak Shin Kim, Young Jun Hong, Chong Kyu Shin, Eun Joo Choi
  • Patent number: 9493644
    Abstract: Provided are a resin blend, which includes a first resin, and a second resin having hydrogen-binding donor and acceptor, and having a difference in surface energy from the first resin at 25° C. of 0.1 to 35 mN/m, and is formed in a layer-separated structure, a pellet, a method of manufacturing the same, and a resin molded article having a specific layer-separated structure. Because of the resin blend, a molded article may have enhanced mechanical properties and surface hardness, and additional surface coating may be omitted, thereby reducing a processing time, increasing productivity, and reducing production costs.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: November 15, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Houng Sik Yoo, Han Na Lee, Jin Young Ryu, Hyeon Choi, Woo Sung Kim, Eun Joo Choi
  • Patent number: 9481149
    Abstract: Provided is a resin article produced by melt processing and having layers formed by a layer-separation. The resin article may include a first resin layer, a second resin layer formed on the first resin layer and an interface layer including a first resin and a second resin and formed between the first resin layer and the second resin layer. The resin article may have improved mechanical and surface characteristics. Further, since coating or plating is not required for manufacturing a resin article, a manufacturing time and/or cost can be reduced, and productivity can be increased.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: November 1, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Houng Sik Yoo, Hak Shin Kim, Jin Young Ryu, Chong Kyu Shin, Young Jun Hong, Jeong Min Kim, Eun Joo Choi
  • Publication number: 20160194426
    Abstract: Provided are a resin, a method of preparing the resin, a resin blend including the resin, a pellet, a method of preparing a resin article using the resin blend and the pellet, and the resin article. An exemplary resin in the present invention may provide a resin article of which a surface has improved mechanical characteristics and surface hardness. Further, the use of the resin enables the resin article to exhibit the above-described effects without an additional coating process for a surface of the resin article, thereby leading to a decrease in manufacturing time and cost and to an increase in productivity.
    Type: Application
    Filed: August 1, 2014
    Publication date: July 7, 2016
    Inventors: Houng Sik YOO, Jin Young RYU, Eun Joo CHOI, Jong Won LEE, Hyeon CHOI