Patents by Inventor SEUNG-CHEOL RYOO

SEUNG-CHEOL RYOO 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: 20220177688
    Abstract: The present invention provides a thermoplastic resin composition which comprises: a first polymer formed by graft polymerization of a diene-based rubber polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; a second polymer comprising an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; a third polymer formed by graft polymerization of an olefin-based polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; and a fourth polymer comprising an olefin-based monomer unit and having a density of 0.92 to 0.94 g/cm3 as measured in accordance with ASTM D1505, a softening point of 100 to 120° C. as measured in accordance with ASTM D1525, and a melt flow index of 5 to 7 g/10 min as measured in accordance with ASTM D1238 at 190° C. and 2.16 kg, wherein the thermoplastic resin composition comprises the fourth polymer at 1 to 10 wt %.
    Type: Application
    Filed: October 6, 2020
    Publication date: June 9, 2022
    Inventors: Jun Ho CHOE, Seung Cheol RYOO, Seong Lyong KIM, Dae San JUNG
  • Patent number: 11214673
    Abstract: The present invention relates to a heat-resistant resin composition including a first copolymer including a conjugated diene-based polymer, units derived from an aromatic vinyl-based monomer, and units derived from a vinyl cyan-based monomer; a second copolymer including units derived from an aromatic vinyl-based monomer and units derived from a vinyl cyan-based monomer and having a glass transition temperature of 115° C. or more; and a third copolymer including units derived from an aromatic vinyl-based monomer and units derived from a vinyl cyan-based monomer, wherein the second copolymer has a linear shape, and the third copolymer has a branched shape and a branched degree of 2 to 8.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: January 4, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Seung Cheol Ryoo, Dae San Jung, Seong Lyong Kim, Jin Oh Nam
  • Patent number: 11111377
    Abstract: The present invention relates to a resin composition including (1) 80 wt % to 99.8 wt % of a butadiene-based graft copolymer mixture; (2) 0.1 wt % to 10 wt % of a graft copolymer including a derived unit from a polyolefin-based polymer, a derived unit from a vinyl cyanide compound and a derived unit from an aromatic vinyl-based compound; and (3) 0.1 wt % to 10 wt % of an alpha olefin-based copolymer.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: September 7, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Seung Cheol Ryoo, Sung Hwan Yoon, Hyun Ki Kim, Seong Lyong Kim, Jin Oh Nam
  • Publication number: 20200369864
    Abstract: The present invention relates to a heat-resistant resin composition including a first copolymer including a conjugated diene-based polymer, units derived from an aromatic vinyl-based monomer, and units derived from a vinyl cyan-based monomer; a second copolymer including units derived from an aromatic vinyl-based monomer and units derived from a vinyl cyan-based monomer and having a glass transition temperature of 115° C. or more; and a third copolymer including units derived from an aromatic vinyl-based monomer and units derived from a vinyl cyan-based monomer, wherein the second copolymer has a linear shape, and the third copolymer has a branched shape and a branched degree of 2 to 8.
    Type: Application
    Filed: December 11, 2018
    Publication date: November 26, 2020
    Inventors: Seung Cheol RYOO, Dae San JUNG, Seong Lyong KIM, Jin Oh NAM
  • Publication number: 20200239682
    Abstract: The present invention relates to a resin composition including (1) 80 wt % to 99.8 wt % of a butadiene-based graft copolymer mixture; (2) 0.1 wt % to 10 wt % of a graft copolymer including a derived unit from a polyolefin-based polymer, a derived unit from a vinyl cyanide compound and a derived unit from an aromatic vinyl-based compound; and (3) 0.1 wt % to 10 wt % of an alpha olefin-based copolymer.
    Type: Application
    Filed: November 23, 2018
    Publication date: July 30, 2020
    Inventors: Seung Cheol RYOO, Sung Hwan YOON, Hyun Ki KIM, Seong Lyong KIM, Jin Oh NAM
  • Patent number: 10364346
    Abstract: Disclosed are an ABS-based resin composition and a molded article manufactured therefrom. More particularly, the ABS-based resin composition according to the present disclosure includes (a) 22.5 to 50% by weight of a vinyl cyan compound-conjugated diene-based rubber-like polymer-aromatic vinyl compound copolymer resin; (b) 47.5 to 75% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer resin; (c) 1 to 6% by weight of a polyether ester amide resin; and (d) 1.5 to 3% by weight of an ethoxylated alkylamine-based antistatic agent, thereby providing a high humidification amount and less deformation. Accordingly, the present disclosure relates to an ABS-based resin composition suitable for application to disks for air washers, humidifiers, and the like, and a molded article manufactured therefrom.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: July 30, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Seung Cheol Ryoo, Soo Kyeong Lee, Seong Lyong Kim
  • Patent number: 10106677
    Abstract: The present invention relates to a thermoplastic resin composition with excellent chemical resistance and, more specifically, to a resin composition for blow molding and a molded product obtained by molding the same, the composition maintaining the balance of flowability and impact resistance and improving chemical resistance by controlling the glass transition temperature (Tg) and the weight average molecular weight (Mw) of an ?-methylstyrene (AMS)-based heat-resistant resin in a copolymer of vinyl cyanide compound-rubbery polymer-aromatic vinyl compound, having reinforced heat resistance, particularly, in an acrylonitrile-butadiene-styrene (ABS) copolymer resin. According to the present invention, an ABS resin composition for blow molding, having excellent chemical resistance while maintaining the balance of flowability, impact resistance and heat resistance to be of at least the same level, and a molded product obtained by applying the same can be obtained.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 23, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Soo Kyeong Lee, Seung Cheol Ryoo, Seong Lyong Kim
  • Publication number: 20170260386
    Abstract: Disclosed are an ABS-based resin composition and a molded article manufactured therefrom. More particularly, the ABS-based resin composition according to the present disclosure includes (a) 22.5 to 50% by weight of a vinyl cyan compound-conjugated diene-based rubber-like polymer-aromatic vinyl compound copolymer resin; (b) 47.5 to 75% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer resin; (c) 1 to 6% by weight of a polyether ester amide resin; and (d) 1.5 to 3% by weight of an ethoxylated alkylamine-based antistatic agent, thereby providing a high humidification amount and less deformation. Accordingly, the present disclosure relates to an ABS-based resin composition suitable for application to disks for air washers, humidifiers, and the like, and a molded article manufactured therefrom.
    Type: Application
    Filed: November 11, 2016
    Publication date: September 14, 2017
    Inventors: Seung Cheol RYOO, Soo Kyeong LEE, Seong Lyong KIM
  • Publication number: 20170260382
    Abstract: The present invention relates to a thermoplastic resin composition with excellent chemical resistance and, more specifically, to a resin composition for blow molding and a molded product obtained by molding the same, the composition maintaining the balance of flowability and impact resistance and improving chemical resistance by controlling the glass transition temperature (Tg) and the weight average molecular weight (Mw) of an ?-methylstyrene (AMS)-based heat-resistant resin in a copolymer of vinyl cyanide compound-rubbery polymer-aromatic vinyl compound, having reinforced heat resistance, particularly, in an acrylonitrile-butadiene-styrene (ABS) copolymer resin. According to the present invention, an ABS resin composition for blow molding, having excellent chemical resistance while maintaining the balance of flowability, impact resistance and heat resistance to be of at least the same level, and a molded product obtained by applying the same can be obtained.
    Type: Application
    Filed: November 24, 2015
    Publication date: September 14, 2017
    Inventors: Soo Kyeong LEE, Seung Cheol RYOO, Seong Lyong KIM
  • Publication number: 20020028878
    Abstract: A process for preparing the acrylate styrene acrylonitrile (ASA) resin having an improved impact strength and a low water content is disclosed. The process comprises the step of preparing alkyl acrylate rubber polymers and the step of grafting aromatic vinyl compounds and cyanized vinyl compounds to the alkyl acrylate rubber polymers. Such emulsifiers as alkyl sulfosuccinate metal salts having 12-18 carbon atoms, alkyl sulfuric acid esters having 12-20 carbon atoms or sulfonic acid metal salts are used in the step of preparing the alkyl acrylate rubber polymers. The emulsifiers as rosinic acid metal salts or carboxylic acid metal salts having 12-20 carbon atoms are used in the grafting step.
    Type: Application
    Filed: August 10, 1999
    Publication date: March 7, 2002
    Inventors: YANG-HYUN SHIN, KEUN-HOON YOO, SEUNG-CHEOL RYOO, CHAN-HONG LEE