Patents by Inventor Suk Jo CHOI

Suk Jo CHOI 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: 20240240008
    Abstract: The present disclosure relates to a resin composition and relates to a resin composition having excellent heat resistance and impact resistance and accomplishing the high degree of blackness.
    Type: Application
    Filed: September 15, 2023
    Publication date: July 18, 2024
    Applicants: HYUNDAI MOTOR COMPANY, Kia Corporation, LG CHEM, LTD.
    Inventors: Min Jin CHOI, Choon Ho LEE, Woo Chul JUNG, Kyoung Sil LEE, Hyun Jun RYU, Suk Jo CHOI, Myoung Jun LIM, Tae Hoon KIM
  • Patent number: 11773233
    Abstract: The present invention relates to a carbon composite material and a method for producing the same, and more particularly, to a carbon composite material capable of improving electrostatic dispersibility and flame retardancy, and a method for producing the same. The carbon composite material according to the present invention can be effectively applied to products requiring conductivity and flame retardancy.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: October 3, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Seokwon Kim, Se Hyun Kim, Tae Hyung Kim, Pyeong-Gi Kim, Suk Jo Choi, Dong Hyun Cho
  • Patent number: 11634575
    Abstract: The present invention relates to a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. More specifically, the present invention relates to a thermoplastic resin composition including 100 parts by weight of a base resin including a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer and an ?-methyl styrene compound-vinyl cyanide compound copolymer and 0.4 to 3 parts by weight of an alkoxylated polyethyleneimine, a method of preparing the thermoplastic resin composition, and a molded article including the thermoplastic resin composition. The thermoplastic resin composition according to the present invention has improved chemical resistance to solvents such as thinner without degradation in fluidity and mechanical properties, and thus has excellent paintability.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: April 25, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Seunghun Han, Suk Jo Choi, Jinoh Nam, Seong Lyong Kim
  • Publication number: 20230109397
    Abstract: The present disclosure relates to a thermoplastic resin composition including a styrene-based copolymer comprising a (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a maleimide-based monomer; a first graft copolymer including an acrylic-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer; and a second graft copolymer comprising an acrylic-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer, wherein the styrene-based copolymer has a residual oligomer content of 0.37% by weight or less, and the acrylic-based rubber polymer of the first graft copolymer and the acrylic-based rubber polymer of the second graft copolymer have different average particle diameters. A method of preparing the thermoplastic resin composition, and a molded article including the thermoplastic resin composition are also disclosed.
    Type: Application
    Filed: June 11, 2021
    Publication date: April 6, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Insoo KIM, Hyung Sub LEE, Dae Woo LEE, Jung Tae PARK, Suk Jo CHOI, Mincheol JU, Minseung SHIN, Sungwon HONG, Hyun Jun RYU
  • Publication number: 20220348760
    Abstract: Disclosed are a thermoplastic resin composition, a method of preparing the same, and a molded article manufactured using the same. The thermoplastic resin composition includes 3 to 22% by weight of a graft copolymer (A-1) including an acrylate-based rubber having an average particle diameter of 200 to 400 nm, an aromatic vinyl compound, and a vinyl cyanide compound; 17 to 40% by weight of a graft copolymer (A-2) including an acrylate-based rubber having an average particle diameter of 50 to 199 nm, an aromatic vinyl compound, and a vinyl cyanide compound; 30 to 57% by weight of a copolymer (B) including a (meth)acrylic acid alkyl ester compound, an ?-methyl styrene-based compound, and a vinyl cyanide compound; and 6 to 30% by weight of a polymethacrylate resin (C) (except for ?-methyl styrene), wherein an average multi-axial impact strength is 22 J/mm or more.
    Type: Application
    Filed: July 19, 2021
    Publication date: November 3, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Suk Jo CHOI, Hyun Jun RYU, Tae Hoon KIM
  • Publication number: 20220298347
    Abstract: The present disclosure relates to a thermoplastic resin composition and a molded article including the same. The present disclosure relates to a thermoplastic resin composition including two or more types of acrylic graft resins (A) having different average particle diameters; a first copolymer (B) including an alkyl-substituted styrene, a (meth)acrylate, and a vinyl cyanide compound; a second copolymer (C) including an alkyl-unsubstituted styrene, a (meth)acrylate, and a vinyl cyanide compound; and a (meth)acrylate polymer (D), wherein the (meth)acrylate is included in an amount of 40 to 59% by weight based on a total weight of the thermoplastic resin composition, and a molded article including the thermoplastic resin composition. The thermoplastic resin composition having these compositional features may have excellent impact resistance, fluidity, and heat resistance, and may provide an economic advantage by suppressing increase in processing cost.
    Type: Application
    Filed: February 25, 2021
    Publication date: September 22, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Jun RYU, Suk Jo CHOI, Tae Hoon KIM, Hyunmin KIM
  • Patent number: 11198780
    Abstract: The present invention relates to a carbon composite, which comprises a polymer resin and a carbon material having specific conditions, thereby controlling a dielectric constant. According to the present invention, the carbon composite and a method for controlling a dielectric constant by using the same can be variously applied to a circuit, an electronic material and the like by establishing a correlation between the specific surface area of the carbon material and the dielectric property of the carbon composite.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: December 14, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Pyeong-Gi Kim, Seokwon Kim, Se Hyun Kim, Tae Hyung Kim, Suk Jo Choi, Dong Hyun Cho
  • Publication number: 20210047507
    Abstract: The present invention relates to a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. More specifically, the present invention relates to a thermoplastic resin composition including 100 parts by weight of a base resin including a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer and an ?-methyl styrene compound-vinyl cyanide compound copolymer and 0.4 to 3 parts by weight of an alkoxylated polyethyleneimine, a method of preparing the thermoplastic resin composition, and a molded article including the thermoplastic resin composition. The thermoplastic resin composition according to the present invention has improved chemical resistance to solvents such as thinner without degradation in fluidity and mechanical properties, and thus has excellent paintability.
    Type: Application
    Filed: November 7, 2019
    Publication date: February 18, 2021
    Inventors: Seunghun HAN, Suk Jo CHOI, Jinoh NAM, Seong Lyong KIM
  • Publication number: 20190002680
    Abstract: The present invention relates to a carbon composite, which comprises a polymer resin and a carbon material having specific conditions, thereby controlling a dielectric constant. According to the present invention, the carbon composite and a method for controlling a dielectric constant by using the same can be variously applied to a circuit, an electronic material and the like by establishing a correlation between the specific surface area of the carbon material and the dielectric property of the carbon composite.
    Type: Application
    Filed: October 17, 2016
    Publication date: January 3, 2019
    Inventors: Pyeong-Gi KIM, Seokwon KIM, Se Hyun KIM, Tae Hyung KIM, Suk Jo CHOI, Dong Hyun CHO
  • Publication number: 20180201751
    Abstract: The present invention relates to a carbon composite material and a method for producing the same, and more particularly, to a carbon composite material capable of improving electrostatic dispersibility and flame retardancy, and a method for producing the same. The carbon composite material according to the present invention can be effectively applied to products requiring conductivity and flame retardancy.
    Type: Application
    Filed: October 17, 2016
    Publication date: July 19, 2018
    Inventors: Seokwon KIM, Se Hyun KIM, Tae Hyung KIM, Pyeong-Gi KIM, Suk Jo CHOI, Dong Hyun CHO