Patents by Inventor Young-young Hwang

Young-young Hwang 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).

  • Copolycarbonate and composition comprising the same
    Patent number: 9745418
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature and melt index.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: August 29, 2017
    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
  • Copolycarbonate and composition containing the same
    Patent number: 9745466
    Abstract: Disclosed is a copolycarbonate including an aromatic polycarbonate-based first repeating unit; and one or more aromatic polycarbonate-based second repeating units having siloxane bonds represented by Chemical Formula 2 and Chemical Formula 3: The copolycarbonate provides improved impact strength at low-temperature and improved YI (yellow index) simultaneously.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: August 29, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Jung Jun Park, Hyong Min Bahn, Young Young Hwang, Moo Ho Hong, Ki Jae Lee, Min Jeong Kim, Byoung Kyu Chun, Un Ko, Young Wook Son
  • Copolycarbonate and composition comprising the same
    Patent number: 9732186
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature, and melt index.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: August 15, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Hyong Min Bahn, Moo Ho Hong, Jung Jun Park, Byoung Kyu Chun, Young Young Hwang, Min Jeong Kim, Un Ko, Ki Jae Lee
  • POLYCARBONATE RESIN COMPOSITION AND OPTICAL MOLDED PRODUCT COMPRISING THE SAME
    Publication number: 20170218198
    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: Application
    Filed: March 31, 2016
    Publication date: August 3, 2017
    Applicant: 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
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20170190833
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same, and more specifically to a technique for improving flame retardance and chemical resistance while maintaining inherent impact strength and melt index of the copolycarbonate, by comprising a branched repeating unit in the copolycarbonate structure.
    Type: Application
    Filed: December 3, 2015
    Publication date: July 6, 2017
    Inventors: Young Young HWANG, Jung Jun PARK, Moo Ho HONG
  • Polycarbonate resin composition
    Patent number: 9688843
    Abstract: Disclosed is a polycarbonate resin a composition. The polycarbonate resin composition may simply and exactly improve appearance properties such as yellow index (Y.I), haze and the like, and thermal stability during a high-temperature process, and provide processability by reducing gas generation during molding, through provision of a relational formula of addition amounts of a hindered phenol-based compound and a phosphite-based compound which function as antioxidants when mixed with the polycarbonate resin.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: June 27, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Hyong Min Bahn, Min Jeong Kim, Jung Jun Park, Moo Ho Hong, Young Young Hwang
  • COPOLYCARBONATE COMPOSITION AND ARTICLE CONTAINING THE SAME
    Publication number: 20170158852
    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: Application
    Filed: December 3, 2015
    Publication date: June 8, 2017
    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
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20170137568
    Abstract: The present invention relates to copolycarbonates and a molded article comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus has characteristics of providing excellent residence heat stability.
    Type: Application
    Filed: December 2, 2015
    Publication date: May 18, 2017
    Inventors: Byoung Kyu CHUN, Hyong Min BAHN, Young Young HWANG, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Un KO, Young Wook SON
  • Hydroxyl-capping monomer, its polycarbonate and article containing the same
    Patent number: 9550858
    Abstract: Disclosed are a hydroxy-capping monomer, its polycarbonate and an article including the same. Disclosed is a capping monomer capable of greatly improving mechanical properties and weather resistance when applied to polycarbonate, and polycarbonate containing the same, being prepared at high economic efficiency and having superior mechanical properties and excellent weather resistance.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: January 24, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Jung Jun Park, Min Jeong Kim, Hyong Min Bahn, Moo Ho Hong, Young Young Hwang
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160376405
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate and thus, has characteristics of providing improved impact strength at low-temperature and improved YI (yellow index) simultaneously.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 29, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Min Jeong KIM, Byoung Kyu CHUN, Un KO, Young Wook SON
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160369048
    Abstract: The present invention relates to a copolycarbonate and a composition 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 small difference between an impact strength at room temperature and an impact strength at low-temperature and thereby exhibits an excellent impact resistance.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Young Wook SON, Byoung Kyu CHUN, Un KO
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160369047
    Abstract: The present invention relates to a copolycarbonate and a composition 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 thus exhibits improved chemical resistance and impact strength simultaneously.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Young Young HWANG, Hyong Min BAHN, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Young Wook SON, Byoung Kyu CHUN, Un KO
  • POLYCARBONATE RESIN COMPOSITION
    Publication number: 20160369095
    Abstract: The present invention relates to a polycarbonate resin composition which may improve melting properties of a copolycarbonate in which a polysiloxane structure is introduced in a main chain of the polycarbonate. The present polycarbonate resin composition comprises a polycarbonate together with a copolycarbonate and thus may improve melting properties while maintaining the physical properties of the copolycarbonate to the maximum.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO, Young Wook SON
  • COPOLYCARBONATE RESIN COMPOSITION
    Publication number: 20160326312
    Abstract: The copolycarbonate composition according to the present invention has characteristics that it has excellent mobility and thus is excellent in various physical properties simultaneously.
    Type: Application
    Filed: December 3, 2015
    Publication date: November 10, 2016
    Inventors: Jung Jun PARK, Young Young HWANG, Moo Ho HONG, Hyong Min BAHN, Hee Yong PARK
  • POLYCARBONATE COMPOSITION AND ARTICLE COMPRISING THE SAME
    Publication number: 20160326321
    Abstract: The present invention provides a polycarbonate composition and an article comprising the same, wherein the polycarbonate composition comprises a copolycarbonate comprising a specific siloxane structure and a branched polycarbonate comprising a branched repeating unit to improve flame retardancy and chemical resistance while maintaining high impact strength and melt index.
    Type: Application
    Filed: December 4, 2015
    Publication date: November 10, 2016
    Inventors: Jung Jun PARK, Young Young HWANG, Moo Ho HONG, Hyong Min BAHN
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160326314
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus exhibits an excellent transparency and a high spiral flow while having a high impact strength at room temperature and a low melt index.
    Type: Application
    Filed: December 4, 2015
    Publication date: November 10, 2016
    Inventors: Young Wook SON, Hyong Min BAHN, Young Young HWANG, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160297925
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature, and melt index.
    Type: Application
    Filed: September 4, 2015
    Publication date: October 13, 2016
    Inventors: Hyong Min BAHN, Moo Ho HONG, Jung Jun PARK, Byoung Kyu CHUN, Young Young HWANG, Min Jeong KIM, Un KO, Ki Jae LEE
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160297926
    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: Application
    Filed: November 16, 2015
    Publication date: October 13, 2016
    Inventors: Young Young HWANG, Hyong Min BAHN, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO, Young Wook SON
  • Polyorganosiloxane compound, method for preparing the same, and copolycarbonate resin comprising the same
    Patent number: 9452969
    Abstract: A polyorganosiloxane compound, a method of preparing the same, and a copolycarbonate resin comprising the same are disclosed. Particularly, a copolycarbonate resin, which may be applied to a variety of applications, and in particular, comprises a polyorganosiloxane compound used as an impact modifier, a modifier, or a comonomer of a copolycarbonate resin and has improved mechanical properties such as low-temperature impact strength, is disclosed.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: September 27, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Hyong Min Bahn, Moo Ho Hong, Young Young Hwang, Min Jeong Kim, Jung Jun Park
  • HYDROXYL-CAPPING MONOMER, ITS POLYCARBONATE AND ARTICLE CONTAINING THE SAME
    Publication number: 20160272759
    Abstract: Disclosed are a hydroxy-capping monomer, its polycarbonate and an article including the same. Disclosed is a capping monomer capable of greatly improving mechanical properties and weather resistance when applied to polycarbonate, and polycarbonate containing the same, being prepared at high economic efficiency and having superior mechanical properties and excellent weather resistance.
    Type: Application
    Filed: July 1, 2014
    Publication date: September 22, 2016
    Inventors: Jung Jun PARK, Min Jeong KIM, Hyong Min BAHN, Moo Ho HONG, Young Young HWANG