Patents by Inventor Sang Chul Ji

Sang Chul Ji 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: 10246564
    Abstract: One aspect of the present invention provides an end-modified conjugated diene polymer represented by Formula 1 below: wherein p is a conjugated diene polymer chain; R1 to R7 are each independently C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1 or 2; and n is an integer of 1 to 200, and a method for preparing the same.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: April 2, 2019
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Hanjoung Cho, Jae Young Ko, Min Sung Kwon, Dae Hyung Lee, Eun Kyung Noh, Cheol Min Park, Sang Chul Ji
  • Publication number: 20170291997
    Abstract: One aspect of the present invention provides an end-modified conjugated diene polymer represented by Formula 1 below: wherein p is a conjugated diene polymer chain; R1 to R7 are each independently C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1 or 2; and n is an integer of 1 to 200, and a method for preparing the same.
    Type: Application
    Filed: June 26, 2017
    Publication date: October 12, 2017
    Inventors: Hanjoung Cho, Jae Young Ko, Min Sung Kwon, Dae Hyung Lee, Eun Kyung Noh, Cheol Min Park, Sang Chul Ji
  • Patent number: 9718911
    Abstract: One aspect of the present invention provides an end-modified conjugated diene polymer represented by Formula 1 below: wherein p is a conjugated diene polymer chain; R1 to R7 are each independently C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1 or 2; and n is an integer of 1 to 200, and a method for preparing the same.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: August 1, 2017
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Hanjoung Cho, Jae Young Ko, Min Sung Kwon, Dae Hyung Lee, Eun Kyung Noh, Cheol Min Park, Sang Chul Ji
  • Patent number: 9434751
    Abstract: The present invention relates to an alkylalkoxysilane compound of a novel structure which has an ether group and an dialkylamino group in an alkyl chain of the alkylalkoxysilane and thus has remarkably improved storage stability and hydrophilicity and a method for preparing same.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: September 6, 2016
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Hanjoung Cho, Jae Young Ko, Dae Hyung Lee, Cheol Min Park, Sang Chul Ji
  • Publication number: 20160122480
    Abstract: One aspect of the present invention provides an end-modified conjugated diene polymer represented by Formula 1 below: wherein p is a conjugated diene polymer chain; R1 to R7 are each independently C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1 or 2; and n is an integer of 1 to 200, and a method for preparing the same.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 5, 2016
    Inventors: Hanjoung Cho, Jae Young Ko, Min Sung Kwon, Dae Hyung Lee, Eun Kyung Noh, Cheol Min Park, Sang Chul Ji
  • Patent number: 9249276
    Abstract: The present invention relates to a conjugated diene polymer end-modified with an alkoxysilane derivative. More particularly, the present invention relates to an end-modified conjugated diene polymer, wherein an alkoxysilane derivative having an ether group and a dialkylamino group is bonded as end modifier to an end of a conjugated diene polymer, which is useful as a rubber material for a tire tread owing to improved compatibility with an inorganic reinforcing agent and improves dynamic mechanical properties such as wet traction, rolling resistance, Mooney viscosity, processability, etc.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: February 2, 2016
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Hanjoung Cho, Jae Young Ko, Dae Hyung Lee, Cheol Min Park, Sang Chul Ji
  • Patent number: 8987387
    Abstract: Disclosed is an interfacial polymer for a network used as a coupling agent in mixing of rubber-silica. More particularly, the interfacial polymer for a rubber-silica network is a block copolymer containing a copolymer of conjugated diene and vinyl aromatic monomers, in which when used as a coupling agent in the mixing of synthetic rubber and silica (an inorganic material), the polymer enhances silica dispersibility within the rubber, and improves compatibility and processability, resulting in considerable improvement in the dynamic property as well as the mechanical property of the rubber, and when used in a tire, etc., it enhances automobile braking performance and reduces rolling resistance.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: March 24, 2015
    Assignees: Korea Kumho Petrochemical Co., Ltd., Institute for Research & Industry Cooperation, PNU
    Inventors: Gwang Hoon Kwag, Jong Yeop Lee, Jae Yun Kim, Han Baek Lee, Sang Chul Ji, Hyun Jong Paik, Won Ho Kim, Hee Jeong Kim, Ki Hyun Kim
  • Publication number: 20140243447
    Abstract: The present invention relates to a conjugated diene polymer end-modified with an alkoxysilane derivative. More particularly, the present invention relates to an end-modified conjugated diene polymer, wherein an alkoxysilane derivative having an ether group and a dialkylamino group is bonded as end modifier to an end of a conjugated diene polymer, which is useful as a rubber material for a tire tread owing to improved compatibility with an inorganic reinforcing agent and improves dynamic mechanical properties such as wet traction, rolling resistance, Mooney viscosity, processability, etc.
    Type: Application
    Filed: September 13, 2013
    Publication date: August 28, 2014
    Applicant: KOREAN KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Hanjoung CHO, Jae Young KO, Dae Hyung LEE, Cheol Min PARK, Sang Chul JI
  • Publication number: 20140088320
    Abstract: The present invention relates to an alkylalkoxysilane compound of a novel structure which has an ether group and an dialkylamino group in an alkyl chain of the alkylalkoxysilane and thus has remarkably improved storage stability and hydrophilicity and a method for preparing same.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 27, 2014
    Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Hanjoung CHO, Jae Young KO, Dae Hyung LEE, Cheol Min PARK, Sang Chul JI
  • Publication number: 20130289209
    Abstract: Disclosed is an interfacial polymer for a network used as a coupling agent in mixing of rubber-silica. More particularly, the interfacial polymer for a rubber-silica network is a block copolymer containing a copolymer of conjugated diene and vinyl aromatic monomers, in which when used as a coupling agent in the mixing of synthetic rubber and silica (an inorganic material), the polymer enhances silica dispersibility within the rubber, and improves compatibility and processability, resulting in considerable improvement in the dynamic property as well as the mechanical property of the rubber, and when used in a tire, etc., it enhances automobile braking performance and reduces rolling resistance.
    Type: Application
    Filed: September 20, 2012
    Publication date: October 31, 2013
    Applicants: Institute for Research & Industry Cooperation, PNU, Korea Kumho Petrochemical Co., Ltd.
    Inventors: Gwang Hoon Kwag, Jong Yeop Lee, Jae Yun Kim, Han Baek Lee, Sang Chul Ji, Hyun Jong Paik, Won Ho Kim, Hee Jeong Kim, Ki Hyun Kim