Patents by Inventor Ro-Mi Lee

Ro-Mi Lee 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).

  • Conjugated diene-based polymer rubber composition containing dispersant
    Patent number: 10053552
    Abstract: Disclosed is a rubber composition, including a conjugated diene-based polymer and an amine compound.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: August 21, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, Youk-Reol Na, No-Ma Kim
  • End-functional conjugated diene-based polymer and method of preparing same
    Patent number: 10023661
    Abstract: Disclosed are a modified conjugated diene-based polymer, a method of preparing the same, and a rubber composition including the same.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: July 17, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Jin-Young Kim, Ro-Mi Lee, No-Ma Kim
  • Modified conjugated diene-based polymer, method for preparing same, and rubber composition comprising same
    Patent number: 9969832
    Abstract: Disclosed are a modified conjugated diene-based polymer represented by Chemical Formula 1, a method of preparing the same, and a rubber composition including the same.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: May 15, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Jin-Young Kim, No-Ma Kim, Ro-Mi Lee, He-Seung Lee
  • Modified conjugated diene polymer, method for preparing same, and rubber composition containing same
    Patent number: 9725527
    Abstract: Disclosed are a modified conjugated diene-based polymer represented by specific Chemical Formula and a method of preparing the same.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: August 8, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, No-Ma Kim
  • Anionic polymerization initiator having anionic terminal comprising amine group, production method for modified conjugated diene-based copolymer using same, and rubber composition comprising modified conjugated diene-based copolymer produced in accordance therewith
    Patent number: 9718899
    Abstract: Disclosed are an anionic polymerization initiator, which is an organo-alkali metal compound having an anionic end including an amine group, a method of preparing a modified conjugated diene-based polymer using the same, and a rubber composition including the modified conjugated diene-based polymer prepared thereby. Specifically the polydiene and the anionic initiator contain a group of Chemical Formula 8, below, in Chemical Formula 8, R1 and R2 are each independently a C1-C20 alkyl group, R3 is a C1-C10 alkylene group, R4 and R5 each independently a C1-C10 alkyl group, R1 and R2 are linked with each other to form a ring structure, and * represents a bonding position.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: August 1, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Mi Lee, Ro-Mi Lee, No-Ma Kim
  • END-FUNCTIONAL CONJUGATED DIENE-BASED POLYMER AND METHOD OF PREPARING SAME
    Publication number: 20170066849
    Abstract: Disclosed are a modified conjugated diene-based polymer, a method of preparing the same, and a rubber composition including the same.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 9, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Jin-Young Kim, Ro-Mi Lee, No-Ma Kim
  • MODIFIED CONJUGATED DIENE POLYMER, METHOD FOR PREPARING SAME, AND RUBBER COMPOSITION CONTAINING SAME
    Publication number: 20170058055
    Abstract: Disclosed are a modified conjugated diene-based polymer represented by specific Chemical Formula and a method of preparing the same.
    Type: Application
    Filed: October 22, 2015
    Publication date: March 2, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, No-Ma Kim
  • CONJUGATED DIENE-BASED POLYMER RUBBER COMPOSITION CONTAINING DISPERSANT
    Publication number: 20170009057
    Abstract: Disclosed is a rubber composition, including a conjugated diene-based polymer and an amine compound.
    Type: Application
    Filed: November 4, 2015
    Publication date: January 12, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, Youk-Reol Na, No-Ma Kim
  • ANIONIC POLYMERIZATION INITIATOR HAVING ANIONIC TERMINAL COMPRISING AMINE GROUP, PRODUCTION METHOD FOR MODIFIED CONJUGATED DIENE-BASED COPOLYMER USING SAME, AND RUBBER COMPOSITION COMPRISING MODIFIED CONJUGATED DIENE-BASED COPOLYMER PRODUCED IN ACCORDANCE THEREWITH
    Publication number: 20160347877
    Abstract: Disclosed are an anionic polymerization initiator, which is an organo-alkali metal compound having an anionic end including an amine group, a method of preparing a modified conjugated diene-based polymer using the same, and a rubber composition including the modified conjugated diene-based polymer prepared thereby.
    Type: Application
    Filed: November 20, 2015
    Publication date: December 1, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Sang-Mi Lee, Ro-Mi Lee, No-Ma Kim
  • MODIFIED CONJUGATED DIENE-BASED POLYMER, METHOD FOR PREPARING SAME, AND RUBBER COMPOSITION COMRISING SAME
    Publication number: 20160177011
    Abstract: Disclosed are a modified conjugated diene-based polymer represented by Chemical Formula 1, a method of preparing the same, and a rubber composition including the same.
    Type: Application
    Filed: September 25, 2014
    Publication date: June 23, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Jin-Young Kim, No-Ma Kim, Ro-Mi Lee, He-Seung Lee
  • Catalyst system for olefin polymerization comprising trioxasilocane and method for olefin polymerization using the same
    Patent number: 7884164
    Abstract: The present invention relates to a catalyst system for olefin polymerization and a method for olefin polymerization using the same. More particularly, the present invention relates to a Ziegler-Natta catalyst system for olefin polymerization comprising a transition metal compound as a main catalyst component, an organic metal compound as a cocatalyst component, and a cyclic organosilane compound, trioxasilocane as an external electron donor, and a method for olefin polymerization using the same. According to the present invention, a polyolefin having improved various properties such as polymerization activity, melt-flow ability, isotacticity, molecular weight distribution and apparent density can be produced.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: February 8, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Nan-Young Lee, Churl-Young Park, Dong-Ryul Im, Jin-Woo Lee, Ro-Mi Lee
  • Prepolymerized catalyst for olefin polymerization, process for polymerizing olefin by using the catalyst and polyolefin produced by the process
    Patent number: 7776979
    Abstract: The present invention relates to a prepolymerized catalyst for olefin polymerization, a process for polymerizing an olefin by using the catalyst and a polyolefin produced by the process, in which a Ziegler-Natta catalyst is prepolymerized sequentially using ?-olefin and vinyl saturated cyclic hydrocarbon, and then an olefin is polymerized using the prepolymerized Ziegler-Natta catalyst, thereby producing a polyolefin with high yield. Therefore, the polymerized polyolefin has high Isotactic index, bulk density, and crystallinity.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: August 17, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, Churl-Young Park, Cheon-Il Park, Dong-Ryul Im, Jin-Woo Lee, Nan-Young Lee
  • CATALYST SYSTEM FOR OLEFIN POLYMERIZATION COMPRISING TRIOXASILOCANE AND METHOD FOR OLEFIN POLYMERIZATION USING THE SAME
    Publication number: 20100036067
    Abstract: The present invention relates to a catalyst system for olefin polymerization and a method for olefin polymerization using the same. More particularly, the present invention relates to a Ziegler-Natta catalyst system for olefin polymerization comprising a transition metal compound as a main catalyst component, an organic metal compound as a cocatalyst component, and a cyclic organosilane compound, trioxasilocane as an external electron donor, and a method for olefin polymerization using the same. According to the present invention, a polyolefin having improved various properties such as polymerization activity, melt-flow ability, isotacticity, molecular weight distribution and apparent density can be produced.
    Type: Application
    Filed: January 21, 2008
    Publication date: February 11, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Nan-Young Lee, Churl-Young Park, Dong-Ryul Im, Jin-Woo Lee, Ro-Mi Lee
  • Prepolymerized catalyst for olefin polymerization, process for polymerizing olefin by using the catalyst and polyolefin produced by the process
    Publication number: 20080182950
    Abstract: The present invention relates to a prepolymerized catalyst for olefin polymerization, a process for polymerizing an olefin by using the catalyst and a polyolefin produced by the process, in which a Ziegler-Natta catalyst is prepolymerized sequentially using ?-olefin and vinyl saturated cyclic hydrocarbon, and then an olefin is polymerized using the prepolymerized Ziegler-Natta catalyst, thereby producing a polyolefin with high yield. Therefore, the polymerized polyolefin has high Isotactic index, bulk density, and crystallinity.
    Type: Application
    Filed: January 18, 2008
    Publication date: July 31, 2008
    Applicant: LG Chem, Ltd.
    Inventors: Ro-Mi Lee, Churl-Young Park, Cheon-II Park, Dong-Ryul Im, Jin-Woo Lee, Nan-Young Lee