Patents by Inventor Young Kyu Chang

Young Kyu Chang 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: 8633279
    Abstract: A method for continuously producing a thermoplastic resin from a conjugated diene includes: primarily polymerizing a conjugated diene monomer with an aromatic vinyl monomer in a first solvent in a first reactor, and feeding a hydroxyl group-containing polymerization inhibitor and a polar hydrocarbon to the first reactor to prepare a rubber solution; and adding an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer to the rubber solution, and subjecting the mixture to secondary polymerization in a second solvent of the same kind as the first solvent in a second reactor. The method can provide a thermoplastic resin that can have excellent color and low gloss characteristics.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: January 21, 2014
    Assignee: Cheil Industries Inc.
    Inventors: Jae Keun Hong, Sung Hun Kim, Dong Keun Yoo, Young Kyu Chang
  • Publication number: 20130256011
    Abstract: Disclosed herein is a method of fabricating a transparent conductive film, including preparing a carbon nanotube composite composition by blending a carbon nanotube in a solvent; coating the carbon nanotube composite composition on a base substrate to form a carbon nanotube composite film, and acid-treating the carbon nanotube composite film by dipping the carbon nanotube composite film in an acid solution, followed by washing the carbon nanotube composite film with distilled water and drying the washed carbon nanotube composite film to form a transparent electrode on the base substrate. The transparent conductive film can have excellent conductivity, transparency and bending properties following acid treatment, so that it can be used in touch screens and transparent electrodes of foldable flat panel displays. Further, the carbon nanotube composite conductive film can have improved conductivity while maintaining transparency after acid treatment.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 3, 2013
    Inventors: Young Kyu CHANG, Seung Yong BAE, Young Sil LEE, Young Hee LEE, Hong Zhang GENG
  • Patent number: 8512600
    Abstract: The present invention provides a polycarbonate resin composition comprising a polycarbonate (A), a styrene copolymer resin (B), carbon nano-tubes (C) and a carbon black (D).
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: August 20, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Young Min Shin, Sang Wan Kim, Young Kyu Chang, Young Sil Lee
  • Patent number: 8455043
    Abstract: Disclosed herein is a method of fabricating a transparent conductive film, including preparing a carbon nanotube composite composition by blending a carbon nanotube in a solvent; coating the carbon nanotube composite composition on a base substrate to form a carbon nanotube composite film, and acid-treating the carbon nanotube composite film by dipping the carbon nanotube composite film in an acid solution, followed by washing the carbon nanotube composite film with distilled water and drying the washed carbon nanotube composite film to form a transparent electrode on the base substrate. The transparent conductive film can have excellent conductivity, transparency and bending properties following acid treatment, so that it can be used in touch screens and transparent electrodes of foldable flat panel displays. Further, the carbon nanotube composite conductive film can have improved conductivity while maintaining transparency after acid treatment.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: June 4, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Young Kyu Chang, Seung Yong Bae, Young Sil Lee, Young Hee Lee, Hong Zhang Geng
  • Patent number: 8419979
    Abstract: The thermoplastic resin composition of present invention comprises (A) about 50 to about 90% by weight polyphenylene sulfide resin; (B) about 5 to about 30% by weight graphite; (C) about 5 to about 30% by weight fluoropolyolefin resin; (D) about 1 to about 10% by weight whiskers; and (E) about 0.01 to about 10% by weight carbon nanotubes. The thermoplastic resin composition can exhibit electrical conductivity, wear resistance and heat resistance.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: April 16, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Sang Wan Kim, Sun Ho Park, Young Kyu Chang, Young Sil Lee
  • Patent number: 8128844
    Abstract: Disclosed herein are an electrically conductive thermoplastic resin composition and a plastic article. The electrically conductive thermoplastic resin composition comprises about 80 to about 99% by weight of a thermoplastic resin, about 0.1 to about 10% by weight of carbon nanotubes and about 0.1 to about 10% by weight of an organo nanoclay.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: March 6, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Byeong Yeol Kim, Young Sil Lee, Young Kyu Chang
  • Patent number: 8088306
    Abstract: Disclosed herein are an electrically conductive thermoplastic resin composition and a plastic article including the same. The electrically conductive thermoplastic resin composition comprises about 80 to about 99.9 parts by weight of a thermoplastic resin, about 0.1 to about 10 parts by weight of carbon nanotubes, about 0.1 to about 10 parts by weight of an impact modifier, based on a total of about 100 parts by weight of the thermoplastic resin and the carbon nanotubes, and about 0.1 to about 10 parts by weight of conductive metal oxide, based on a total of about 100 parts by weight of the thermoplastic resin and the carbon nanotubes.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: January 3, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Tae Kyun Kim, Young Sil Lee, Young Kyu Chang
  • Publication number: 20110212016
    Abstract: The present invention provides a supported catalyst for synthesizing carbon nanotubes. The supported catalyst includes a metal catalyst supported on a supporting body and a water-soluble polymer, and has an average diameter of about 30 to about 100 ?m.
    Type: Application
    Filed: April 21, 2011
    Publication date: September 1, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Yun Tack LEE, Byeong Yeol KIM, Seung Yong BAE, Young Kyu CHANG, Young Sil LEE
  • Publication number: 20110204298
    Abstract: Disclosed herein is an electro-conductive thermoplastic resin composition with controllable superior electro-conductivity and excellent impact resistance. The electro-conductive thermoplastic resin composition comprises 80 to 99.7 parts by weight of a thermoplastic resin, 0.1 to 5 parts by weight of a carbon nanotube, 0.1 to 5 parts by weight of an impact modifier, and 0.1 to 10 parts by weight of a hydrophobic polymer additive, based on a total of 100 parts by weight of the electro-conductive thermoplastic resin composition.
    Type: Application
    Filed: December 31, 2007
    Publication date: August 25, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Kyu Chang, Sang Wan Kim, Young Sil Lee
  • Publication number: 20110195013
    Abstract: The present invention provides a supported catalyst for synthesizing carbon nanotubes. The supported catalyst includes a metal catalyst supported on a supporting body, and the supported catalyst has a surface area of about 15 to about 100 m2/g. The supported catalyst for synthesizing carbon nanotubes according to the present invention can lower production costs by increasing surface area of a catalytic metal to thereby allow production of a large amount of carbon nanotubes using a small amount of the catalyst.
    Type: Application
    Filed: April 15, 2011
    Publication date: August 11, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Seung Yong BAE, Byeong Yeol KIM, Yun Tack LEE, Young Kyu CHANG, Young Sil LEE
  • Publication number: 20110155965
    Abstract: The present invention provides a polycarbonate resin composition comprising a polycarbonate (A), a styrene copolymer resin (B), carbon nano-tubes (C) and a carbon black (D).
    Type: Application
    Filed: December 15, 2010
    Publication date: June 30, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Min Shin, Sang Wan Kim, Young Kyu Chang, Young Sil Lee
  • Publication number: 20110147640
    Abstract: The thermoplastic resin composition of present invention comprises (A) about 50 to about 90% by weight polyphenylene sulfide resin; (B) about 5 to about 30% by weight graphite; (C) about 5 to about 30% by weight fluoropolyolefin resin; (D) about 1 to about 10% by weight whiskers; and (E) about 0.01 to about 10% by weight carbon nanotubes. The thermoplastic resin composition can exhibit electrical conductivity, wear resistance and heat resistance.
    Type: Application
    Filed: February 18, 2011
    Publication date: June 23, 2011
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Sang Wan KIM, Sun Ho PARK, Young Kyu CHANG, Young Sil LEE
  • Publication number: 20100247891
    Abstract: Disclosed herein is a transfer belt for an image forming apparatus comprising (A) a base layer comprising a thermoplastic resin; and (B) a surface layer comprising a thermoplastic resin composite in which carbon nanotubes are dispersed, wherein the surface layer is laminated on one side of the base layer. The transfer belt for an image forming apparatus can have high surface electrical resistance, resistance homogeneity, homogeneous electrical conductivity, and good mechanical properties.
    Type: Application
    Filed: June 11, 2010
    Publication date: September 30, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Kyu CHANG, Young Sil LEE, Sei Jin OH
  • Publication number: 20100218979
    Abstract: Disclosed herein is a method of fabricating a transparent conductive film, including preparing a carbon nanotube composite composition by blending a carbon nanotube in a solvent; coating the carbon nanotube composite composition on a base substrate to form a carbon nanotube composite film, and acid-treating the carbon nanotube composite film by dipping the carbon nanotube composite film in an acid solution, followed by washing the carbon nanotube composite film with distilled water and drying the washed carbon nanotube composite film to form a transparent electrode on the base substrate. The transparent conductive film can have excellent conductivity, transparency and bending properties following acid treatment, so that it can be used in touch screens and transparent electrodes of foldable flat panel displays. Further, the carbon nanotube composite conductive film can have improved conductivity while maintaining transparency after acid treatment.
    Type: Application
    Filed: May 13, 2010
    Publication date: September 2, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young Kyu CHANG, Seung Yong BAE, Young Sil LEE, Young Hee LEE, Hong Zhang GENG
  • Publication number: 20100144932
    Abstract: Disclosed is a natural fiber reinforced polylactic acid resin composition that includes (A) a mixed resin including (A-1) a polylactic acid resin and (A-2) a natural fiber, (B) a coupling agent, and (C) carbon nanotubes.
    Type: Application
    Filed: December 9, 2009
    Publication date: June 10, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young-Chul KWON, Chang-Do JUNG, Hyung-Tak LEE, Young-Kyu CHANG
  • Publication number: 20090321687
    Abstract: Disclosed herein are an electrically conductive thermoplastic resin composition and a plastic article including the same. The electrically conductive thermoplastic resin composition comprises about 80 to about 99.9 parts by weight of a thermoplastic resin, about 0.1 to about 10 parts by weight of carbon nanotubes, about 0.1 to about 10 parts by weight of an impact modifier, based on a total of about 100 parts by weight of the thermoplastic resin and the carbon nanotubes, and about to about 10 parts by weight of conductive metal oxide, based on a total of about 100 parts by weight of the thermoplastic resin and the carbon nanotubes.
    Type: Application
    Filed: June 22, 2009
    Publication date: December 31, 2009
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Tae Kyun KIM, Young Sil LEE, Young Kyu CHANG
  • Publication number: 20090261303
    Abstract: Disclosed herein are an electrically conductive thermoplastic resin composition and a plastic article. The electrically conductive thermoplastic resin composition comprises about 80 to about 99% by weight of a thermoplastic resin, about 0.1 to about 10% by weight of carbon nanotubes and about 0.1 to about 10% by weight of an organo nanoclay.
    Type: Application
    Filed: June 26, 2009
    Publication date: October 22, 2009
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Byeong Yeol Kim, Young Sil Lee, Young Kyu Chang