Patents by Inventor Un Ko

Un Ko 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: 11859047
    Abstract: Provided is a polycarbonate resin composition and a molded product comprising same. The polycarbonate resin composition comprises a linear polycarbonate resin, a branched polycarbonate resin, a fluorinated sulfonate-based metal salt, a phenyl methyl silicone oil, and a phenyl methyl silicone resin. The linear polycarbonate resin and branched polycarbonate resin include a repeating unit of the following Chemical Formula 1: wherein in Chemical Formula 1: R1 to R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen; and Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: January 2, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Hyong Min Bahn, Un Ko, Jungmoon Bae, Daehyeon Hwang, Mooho Hong, Sugil Yum
  • Publication number: 20230212390
    Abstract: The present disclosure relates to a polycarbonate composition. The polycarbonate composition is a composition in which polyalkylene glycol end-capped with a specific compound is blended in polycarbonate together with two specific antioxidants in a predetermined amount, and can provide a molded article which has high light transmittance, is transparent and particularly has excellent long-term color stability.
    Type: Application
    Filed: October 21, 2021
    Publication date: July 6, 2023
    Inventors: Hyong Min BAHN, Un KO, Cheol Jun SONG, Jeeseon KIM, Jaemyeng JEONG, Hanbit JANG, Sugil YUM, Mooho HONG, Jungmoon BAE
  • Publication number: 20210371584
    Abstract: Provided is a polycarbonate resin composition and a molded product comprising same. The polycarbonate resin composition comprises a linear polycarbonate resin, a branched polycarbonate resin, a fluorinated sulfonate-based metal salt, a phenyl methyl silicone oil, and a phenyl methyl silicone resin. The linear polycarbonate resin and branched polycarbonate resin include a repeating unit of the following Chemical Formula 1: wherein in Chemical Formula 1: R1 to R4 are each independently hydrogen, C1-10 alkyl, C1-10 alkoxy, or halogen; and Z is C1-10 alkylene unsubstituted or substituted with phenyl, C3-15 cycloalkylene unsubstituted or substituted with C1-10 alkyl, O, S, SO, SO2, or CO.
    Type: Application
    Filed: November 6, 2019
    Publication date: December 2, 2021
    Inventors: Hyong Min BAHN, Un KO, Jungmoon BAE, Daehyeon HWANG, Mooho HONG, Sugil YUM
  • Patent number: 11066516
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: July 20, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Byoungkue Chun, Moo Ho Hong, Hyong Min Bahn, Un Ko
  • Patent number: 10995214
    Abstract: The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability and thus can ensure high transparency, and further can enhance the stability of a polycarbonate resin.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: May 4, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Byoungkue Chun, Un Ko, Young Wook Son, Moo Ho Hong, Hyong Min Bahn, Tae Yun Ko
  • Publication number: 20200317912
    Abstract: The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability and thus can ensure high transparency, and further can enhance the stability of a polycarbonate resin.
    Type: Application
    Filed: October 18, 2017
    Publication date: October 8, 2020
    Inventors: Byoungkue CHUN, Un KO, Young Wook SON, Moo Ho HONG, Hyong Min BAHN, Tae Yun KO
  • Patent number: 10577461
    Abstract: Provided are a novel polyorganosiloxane capable of preparing copolycarbonate with improved weather resistance and flowability while maintaining the intrinsic physical properties of polycarbonate resin, and a copolycarbonate prepared by using the same.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: March 3, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Young Young Hwang, Young Wook Son, Moo Ho Hong, Hyong Min Bahn, Byoung Kue Chun, Jung Jun Park, Un Ko, Ki Jae Lee
  • Patent number: 10538620
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: January 21, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Byoungkue Chun, Moo Ho Hong, Young Wook Son, Tae Yun Ko
  • Patent number: 10494478
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: December 3, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Byoungkue Chun, Moo Ho Hong, Young Wook Son, Tae Yun Ko
  • Publication number: 20190300648
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Application
    Filed: June 12, 2019
    Publication date: October 3, 2019
    Inventors: Byoungkue CHUN, Moo Ho HONG, Hyong Min BAHN, Un KO
  • Patent number: 10385163
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: August 20, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Byoungkue Chun, Moo Ho Hong, Hyong Min Bahn, Un Ko
  • Publication number: 20190085122
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Application
    Filed: June 29, 2017
    Publication date: March 21, 2019
    Inventors: Un KO, Byoungkue CHUN, Moo Ho HONG, Young Wook SON, Tae Yun KO
  • Patent number: 10196516
    Abstract: Disclosed are a copolycarbonate resin composition having improved mechanical properties such as impact resistance and chemical resistance while maintaining resin flowability, and an article including the same, where the copolycarbonate resin composition comprises a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond; and a polysiloxane polymer containing a hydrocarbon-based functional group having 2 or more carbon atoms.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: February 5, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Young Young Hwang, Hyong Min Bahn, Jung Jun Park, Moo Ho Hong, Byoung Kyu Chun, Un Ko, Ki Jae Lee, Young Wook Son
  • Publication number: 20190016884
    Abstract: The present invention relates to a polycarbonate resin composition. The polycarbonate resin composition exhibits excellent optical properties, and thus can be used as a material for a light guide plate.
    Type: Application
    Filed: October 11, 2017
    Publication date: January 17, 2019
    Inventors: Young Wook SON, Byoungkue CHUN, Moo Ho HONG, Un KO, Tae Yun KO
  • Patent number: 10174194
    Abstract: Disclosed is a copolycarbonate having an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating units having siloxane bonds, where the copolycarbonate provides an improved residence heat stability, and where the second repeating unit includes a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3:
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: January 8, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Byoung Kyu Chun, Hyong Min Bahn, Young Young Hwang, Jung Jun Park, Moo Ho Hong, Ki Jae Lee, Un Ko, Young Wook Son
  • Patent number: 10040937
    Abstract: The present invention relates to a polycarbonate resin composition and an optical molded product comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color uniformity which are required for a light guide plate, and also excellent in processability. Thus, it can be effectively used as a material of the light guide plate.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 7, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Hyong Min Bahn, Byoung Kyu Chun, Un Ko, Moo Ho Hong, Young Young Hwang, Min Jeong Kim, Jung Jun Park, Ki Jae Lee, Young Wook Son
  • Patent number: 10030096
    Abstract: The present disclosure relates to a polycarbonate resin and a method of preparing the same, has an effect of providing a polycarbonate resin having superior chemical resistance and wear resistance due to application of a predetermined comonomer thereto, and a method of preparing the same.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: July 24, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Hyoung Min Bahn, Byoung Kyu Chun, Jung Jun Park, Ki Jae Lee, Young Wook Son, Moo Ho Hong, Young Young Hwang, Min Jeong Kim
  • Publication number: 20180194894
    Abstract: Provided are a novel polyorganosiloxane capable of preparing copolycarbonate with improved weather resistance and flowability while maintaining the intrinsic physical properties of polycarbonate resin, and a copolycarbonate prepared by using the same.
    Type: Application
    Filed: August 17, 2016
    Publication date: July 12, 2018
    Inventors: Young Young HWANG, Young Wook SON, Moo Ho HONG, Hyong Min BAHN, Byoung Kue CHUN, Jung Jun PARK, Un KO, Ki Jae LEE
  • Patent number: 10011716
    Abstract: The present invention relates to a copolycarbonate resin composition comprising a copolycarbonate in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and a UV stabilizer. Since the present copolycarbonate resin composition has excellent weather resistance, the article prepared by using this composition exhibits less deteriorated surface quality and physical properties caused by ultraviolet rays or the like when exposed to the outside.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: July 3, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Un Ko, Hyong Min Bahn, Young Young Hwang, Jung Jun Park, Moo Ho Hong, Ki Jae Lee, Byoung Kyu Chun, Young Wook Son, Tae Yun Ko
  • Patent number: 9969841
    Abstract: The present invention relates to a copolycarbonate and a molded article comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and has effects of improving impact strength at room temperature, impact strength at low temperature, and melt index properties.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 15, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Young Young Hwang, Hyong Min Bahn, Jung Jun Park, Moo Ho Hong, Ki Jae Lee, Byoung Kyu Chun, Un Ko, Young Wook Son