Patents by Inventor Je-sun Yoo

Je-sun 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).

  • Patent number: 11685830
    Abstract: The present invention relates to a flame retardant resin composition having excellent flame retardancy and improved thermal deformation properties, and a flame retardant resin molded article manufactured therefrom, and provides a flame retardant resin composition including a) a base resin including a polyarylene ether-based polymer; an aromatic vinyl-based polymer and a copolymer of vinylcyan monomer-conjugated diene monomer-aromatic vinyl monomer; b) an organophosphorus-based flame retardant; c) a hypophosphite compound; and d) a sulfur-containing compound including at least two sulfur atoms, wherein b) the organophosphorus-based flame retardant, c) the hypophosphite compound and d) the sulfur-containing compound are included in a weight ratio of 15 to 24:2 to 4:2 to 5.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: June 27, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Jae Young Sim, Seon Hyeong Bae, Jae Yeon Bae, In Seok Kim
  • Publication number: 20230133560
    Abstract: Provided is a resin composition including 25 to 50 parts by weight of a phosphorus-based flame retardant composition, with respect to 100 parts by weight of a base resin including a graft copolymer containing a rubber polymer, and a styrene-based copolymer. The phosphorus-based flame retardant composition includes 30 wt % to 70 wt % of Mn+(diethylphosphinate)?n (M is a metal having an oxidation number of 2 to 5, and n is an integer selected from 2 to 5) and 30 wt % to 70 wt % of ammonium polyphosphate.
    Type: Application
    Filed: August 6, 2021
    Publication date: May 4, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Hee Seung YANG, Ki Young NAM, Je Sun YOO, Jae Young SIM, Seon Hyeong BAE
  • Patent number: 11584849
    Abstract: A thermoplastic resin composition includes a first copolymer including a conjugated diene-based polymer, a unit derived from an aromatic vinyl-based monomer, and a unit derived from a vinyl cyan-based monomer; a second copolymer including a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer; and, with respect to 100 parts by weight of the sum of the first copolymer and the second copolymer, 2.0 to 10 parts by weight of a third copolymer having a soft segment including a unit derived from a polyalkylene glycol and a hard segment including unit derived from an aromatic dicarboxylic acid or aromatic dicarboxylate and a unit derived from a linear aliphatic diol; and 2.5 to 10 parts by weight of a fourth copolymer including an aromatic dicarboxylic acid-derived unit, a unit derived from a linear aliphatic diol, and a unit derived from a cyclic aliphatic diol.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: February 21, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Jae Yeon Bae, Ki Young Nam, Je Sun Yoo, Jae Yong Sim, Seon Hyeong Bae, In Seok Kim
  • Patent number: 11459457
    Abstract: Provided is a thermoplastic resin composition which includes: a base resin including a polyarylene oxide-based polymer at 100 parts by weight; and an additive including one or more selected from the group consisting of compounds represented by Chemical Formula 1-1 to Chemical Formula 1-3 at 0.1 to 5 parts by weight, and can be used for producing a thermoplastic resin molded article which exhibits an excellent coloring property and thus has an aesthetically pleasing appearance.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: October 4, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Jae Yong Sim, Seon Hyeong Bae, Jae Yeon Bae, In Seok Kim
  • Publication number: 20210246306
    Abstract: The present invention relates to a nonhalogen flame retardant resin composition having excellent flame retardancy and improved thermal deformation properties, and a flame retardant resin molded article manufactured therefrom, and provides a nonhalogen flame retardant resin composition including a) a base resin including a polyarylene ether-based polymer; an aromatic vinyl-based polymer and a copolymer of vinylcyan-based monomer-conjugated-based diene monomer-aromatic vinyl-based monomer; b) an organophosphorus-based flame retardant; c) a hypophosphite compound; and d) a sulfur-containing compound including at least two sulfur atoms, wherein b) the organophosphorus-based flame retardant, c) the hypophosphite compound and d) the sulfur-containing compound are included in a weight ratio of 15 to 24:2 to 4:2 to 5.
    Type: Application
    Filed: August 14, 2019
    Publication date: August 12, 2021
    Inventors: Je Sun YOO, Ki Young NAM, Jae Young SIM, Seon Hyeong BAE, Jae Yeon BAE, In Seok KIM
  • Publication number: 20210198484
    Abstract: Provided is a thermoplastic resin composition which includes: a base resin including a polyarylene oxide-based polymer at 100 parts by weight; and an additive including one or more selected from the group consisting of compounds represented by Chemical Formula 1-1 to Chemical Formula 1-3 at 0.1 to 5 parts by weight, and can be used for producing a thermoplastic resin molded article which exhibits an excellent coloring property and thus has an aesthetically pleasing appearance.
    Type: Application
    Filed: April 5, 2019
    Publication date: July 1, 2021
    Inventors: Je Sun YOO, Ki Young NAM, Yong Yeon HWANG, Jae Yong SIM, Seon Hyeong BAE, Jae Yeon BAE, In Seok KIM
  • Publication number: 20210171761
    Abstract: A thermoplastic resin composition includes a first copolymer including a conjugated diene-based polymer, a unit derived from an aromatic vinyl-based monomer, and a unit derived from a vinyl cyan-based monomer; a second copolymer including a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer; and, with respect to 100 parts by weight of the sum of the first copolymer and the second copolymer, 2.0 to 10 parts by weight of a third copolymer having a soft segment including a unit derived from a polyalkylene glycol and a hard segment including unit derived from an aromatic dicarboxylic acid or aromatic dicarboxylate and a unit derived from a linear aliphatic diol; and 2.5 to 10 parts by weight of a fourth copolymer including an aromatic dicarboxylic acid-derived unit, a unit derived from a linear aliphatic diol, and a unit derived from a cyclic aliphatic diol.
    Type: Application
    Filed: January 10, 2019
    Publication date: June 10, 2021
    Inventors: Jae Yeon BAE, Ki Young NAM, Je Sun YOO, Jae Yong SIM, Seon Hyeong BAE, In Seok KIM
  • Patent number: 10836898
    Abstract: The present invention relates to a non-halogen flame retardant resin composition. More particularly, the present invention provides a non-halogen flame retardant resin composition capable of simultaneously exhibiting superior flame retardancy, whiteness, and gloss by addressing problems of a flame retardant resin such as difficulties in realizing V-1 grade or higher flame retardancy when a non-halogen flame retardant is used and poor colorability due to low gloss and whiteness.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: November 17, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Jae Young Sim, Seon Hyeong Bae, Jae Yeon Bae, In Seok Kim
  • Publication number: 20190100647
    Abstract: The present invention relates to a non-halogen flame retardant resin composition. More particularly, the present invention provides a non-halogen flame retardant resin composition capable of simultaneously exhibiting superior flame retardancy, whiteness, and gloss by addressing problems of a flame retardant resin such as difficulties in realizing V-1 grade or higher flame retardancy when a non-halogen flame retardant is used and poor colorability due to low gloss and whiteness.
    Type: Application
    Filed: October 26, 2017
    Publication date: April 4, 2019
    Inventors: Je Sun YOO, Ki Young NAM, Yong Yeon HWANG, Jae Young SIM, Seon Hyeong BAE, Jae Yeon BAE, In Seok KIM
  • Patent number: 10093823
    Abstract: The present invention relates to a flame retardant resin composition including (A) 100 parts by weight of a blend resin composition including a styrene copolymer and a polyester elastomer, (B) 1 to 30 parts by weight of an epoxy resin, and (C) 1 to 30 parts by weight of a phosphor-based flame retardant agent. The flame retardant resin composition has improved flame retardant properties and flexibility and is used for coating a wire and a cable.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: October 9, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jae Young Sim, Ki Young Nam, Yong Yeon Hwang, Je Sun Yoo, Seon Hyeong Bae, Jae Yeon Bae
  • Patent number: 10011710
    Abstract: The present disclosure relates to a flame retardant thermoplastic resin composition having superior thermal stability, and a molded article manufactured from the same. More particularly, the present disclosure provides a flame retardant thermoplastic resin composition exhibiting both superior thermal stability and flame retardancy without harmful gas generation even when injection-molded at high temperature, high pressure, and high speed and a molded article manufactured from the same.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: July 3, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Jae Young Sim, Seon Hyeong Bae, Jae Yeon Bae, In Seok Kim
  • Publication number: 20170342254
    Abstract: The present disclosure relates to a flame retardant thermoplastic resin composition having superior thermal stability, and a molded article manufactured from the same. More particularly, the present disclosure provides a flame retardant thermoplastic resin composition exhibiting both superior thermal stability and flame retardancy without harmful gas generation even when injection-molded at high temperature, high pressure, and high speed and a molded article manufactured from the same.
    Type: Application
    Filed: October 18, 2016
    Publication date: November 30, 2017
    Inventors: Je Sun YOO, Ki Young NAM, Yong Yeon HWANG, Jae Young SIM, Seon Hyeong BAE, Jae Yeon BAE, In Seok KIM
  • Patent number: 9790355
    Abstract: Disclosed is a thermoplastic resin composition. Due to addition of the epoxy-based resin, the phosphorous-based flame retardant, the silicon-based compound and the calcium carbonate to the basic resin according to the present invention, a thermoplastic resin composition having superior flame retardancy and excellent rigidity, heat resistance and processability, and a molded article manufactured therefrom may be provided.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: October 17, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Jae Young Sim, Seon Hyeong Bae, Jae Yeon Bae
  • Publication number: 20160230038
    Abstract: The present invention relates to a flame retardant resin composition including (A) 100 parts by weight of a blend resin composition including a styrene copolymer and a polyester elastomer, (B) 1 to 30 parts by weight of an epoxy resin, and (C) 1 to 30 parts by weight of a phosphor-based flame retardant agent. The flame retardant resin composition has improved flame retardant properties and flexibility and is used for coating a wire and a cable.
    Type: Application
    Filed: October 14, 2014
    Publication date: August 11, 2016
    Inventors: Jae Young SIM, Ki Young NAM, Yong Yeon HWANG, Je Sun YOO, Seon Hyeong BAE, Jae Yeon BAE
  • Publication number: 20160145429
    Abstract: Disclosed is a thermoplastic resin composition. Due to addition of the epoxy-based resin, the phosphorous-based flame retardant, the silicon-based compound and the calcium carbonate to the basic resin according to the present invention, a thermoplastic resin composition having superior flame retardancy and excellent rigidity, heat resistance and processability, and a molded article manufactured therefrom may be provided.
    Type: Application
    Filed: October 14, 2015
    Publication date: May 26, 2016
    Inventors: Je Sun YOO, Ki Young NAM, Yong Yeon HWANG, Jae Young SIM, Seon Hyeong BAE, Jae Yeon BAE
  • Patent number: 9279050
    Abstract: Disclosed is a non-halogen flame retardant styrene resin composition which comprises (a) a styrene resin and (b) a phosphorous-modified epoxy resin and thus exhibits superior flame retardancy to external candle flame ignition.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: March 8, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Jae Yong Sim, Ki Young Nam, Yong Yeon Hwang, Je Sun Yoo, Min Sul Jang
  • Patent number: 9181425
    Abstract: Disclosed is a thermoplastic resin composition comprising A) 100 parts by weight of a basic resin comprising 11 to 89% by weight of an acrylonitrile-butadiene-styrene copolymer and 89 to 11% by weight of a styrene-acrylonitrile copolymer, B) 10 to 40 parts by weight of a bromine organic flame retardant, and C) 0.1 to 10 parts by weight of a coated antimony compound.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: November 10, 2015
    Assignee: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Min Sul Jang, Jae Young Sim
  • Publication number: 20140243454
    Abstract: Disclosed is a non-halogen flame retardant styrene resin composition which comprises (a) a styrene resin and (b) a phosphorous-modified epoxy resin and thus exhibits superior flame retardancy to external candle flame ignition.
    Type: Application
    Filed: January 15, 2014
    Publication date: August 28, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Jae Yong SIM, Ki Young NAM, Yong Yeon HWANG, Je Sun YOO, Min Sul JANG
  • Publication number: 20130178564
    Abstract: Disclosed is a thermoplastic resin composition with superior flame retardancy, colorability and scratch resistance. More specifically, disclosed is a thermoplastic resin composition comprising A) 100 parts by weight of a basic resin comprising 11 to 89% by weight of an acrylonitrile-butadiene-styrene copolymer and 89 to 11% by weight of a styrene-acrylonitrile copolymer, B) 10 to 40 parts by weight of a bromine organic flame retardant, and C) 0.1 to 10 parts by weight of a coated antimony compound.
    Type: Application
    Filed: March 31, 2011
    Publication date: July 11, 2013
    Applicant: LG CHEM, LTD.
    Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Min Sul Jang, Jae Young Sim
  • Patent number: 8263693
    Abstract: The present invention provides a flame retardant resin composition comprising (A) 100 weight part of a basic resin comprising acrylonitrile-butadiene-styrene copolymer resin and styrene-acrylonitrile copolymer resin; and (B) 10-30 weight part of a bromine-based organic compound flame retardant, and selectively comprising (C) 1-20 weight part of an antimony-based auxiliary flame retardant and (D) 1-10 weight part of one or more compounds selected from the group consisting of metalstearate and stearamide compounds, wherein the bromine-based organic compound flame retardant (B) is octabromodiphenyl ethane. The flame retardant resin composition of the present invention has excellent flame retardancy, impact strength and melt flow index.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: September 11, 2012
    Assignee: LG Chem, Ltd.
    Inventors: You-seok Seo, Ki-young Nam, Yong-yeon Hwang, Je-sun Yoo, Hyeon-gook Kim, Myeong-soo Song