Patents by Inventor Won-Kook Kim

Won-Kook Kim 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).

  • Publication number: 20120135216
    Abstract: The present invention relates to novel organic-inorganic silica particles, a preparation method thereof, and a hard coating composition containing the same, and more specifically, to organic-inorganic silica particles wherein an initiator is chemically bonded to hydroxyl groups (—OH) on the surface of the silica particles, a preparation method thereof, and a hard coating composition containing the same. A hard coating film with excellent abrasion resistance, scratch resistance and the like can be prepared by using the hard coating composition containing the organic-inorganic silica particles according to the present invention.
    Type: Application
    Filed: August 31, 2010
    Publication date: May 31, 2012
    Applicant: LG HAUSYS, LTD.
    Inventors: Dongjoo Kwon, Won-Kook Kim, Yanggu Kang
  • Publication number: 20120055918
    Abstract: The present invention relates to a heat-generating film and to a heat-generating product comprising same. The heat-generating film of the present invention can continuously and stably generate heat even at a low voltage, for example, at a voltage of 12V or lower. In addition, the heat-generating film of the present invention has excellent comfort properties, filling properties, and flexibility. Accordingly, the heat-generating film of the present invention can be applied to a variety of heat-generating products, for example to a heat-generating sheet for a vehicle or for a baby stroller, or to a variety of portable heat-generating products or the like to exhibit superior effects.
    Type: Application
    Filed: October 13, 2010
    Publication date: March 8, 2012
    Applicant: LG HAUSYS, LTD.
    Inventors: Seonghoon Yue, Yongbae Jung, Won-Kook Kim, Jong-Bum Kim
  • Publication number: 20110245069
    Abstract: The present invention relates to a catalyst system for preparing a cyclic olefin addition polymer, a method for preparing the catalyst system and a cyclic olefin addition polymer prepared by the method, and more particularly to the method comprising the steps of contacting some content of norbornene-based monomer having a specific polar functional group with a catalyst system comprising a) a Group X transition metal compound; b) a compound comprising a neutral Group XV electron donor ligand having a cone angle of at least 160°; and c) a salt capable of offering an anion that can be weakly coordinated to the transition metal of the a) the Group X transition metal compound.
    Type: Application
    Filed: June 16, 2011
    Publication date: October 6, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Ho CHUN, Won-Kook KIM, Sung-Cheol YOON, Tae-Sun LIM, Heon KIM, Kyoung-Hoon KIM
  • Patent number: 7989570
    Abstract: The present invention relates to a catalyst system for preparing a cyclic olefin addition polymer, a method for preparing the catalyst system and a cyclic olefin addition polymer prepared by the method, and more particularly to the method comprising the steps of contacting some content of norbornene-based monomer having a specific polar functional group with a catalyst system comprising a) a Group X transition metal compound; b) a compound comprising a neutral Group XV electron donor ligand having a cone angle of at least 160°; and c) a salt capable of offering an anion that can be weakly coordinated to the transition metal of the a) the Group X transition metal compound.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: August 2, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Ho Chun, Won-Kook Kim, Sung-Cheol Yoon, Tae-Sun Lim, Heon Kim, Kyoung-Hoon Kim
  • Patent number: 7989571
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: August 2, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Ho Chun, Won-Kook Kim, Sung-Cheol Yoon, Tae-Sun Lim, Heon Kim, Kyoung-Hoon Kim, Jung-Min Lee, Kyung-Lim Paik, Sang-Doo Ahn
  • Patent number: 7814713
    Abstract: A catalyst system capable of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups of monomers, and a method of producing polymers using the same are provided. The catalyst system for polymerization of olefin according to the present invention has good thermal and chemical stability, and thus, in the method of preparing polyolefin using the catalyst system, the deactivation of a catalyst due to a polar functional group of the monomer can be prevented, and thus a high yield of the cyclic olefin polymer with a high molecular weight can be obtained when a ratio of the catalyst to the monomer is 1:5000, and the removal of a catalyst residue is not required.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: October 19, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Sung Cheol Yoon, Young Chul Won, Young Whan Park, Sung Ho Chun, Dai Seung Choi, Won Kook Kim, Taesun Lim, Heon Kim, Jungmin Lee, Kyung Lim Paik
  • Patent number: 7786231
    Abstract: Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising: preparing a catalyst mixture including i) a precatalyst, containing a Group 10 transition metal having a ligand containing oxygen ions bonded to the metal; ii) a first cocatalyst which is an organic compound containing a Group 15 element; and iii) a second cocatalyst which is capable of providing an anion and weakly coordinating to the metal of the precatalyst; and subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, at a temperature of 80-200° C., the total amount of the organic solvent being 50-800% by weight based on the total weight of the monomer contained in the monomer solution, and the product yield of the polymer being 50% by weight or more based on the total weight of the monomer.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: August 31, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Cheol Yoon, Sung-Ho Chun, Won-Kook Kim, Tae-Sun Lim, Heon Kim, Jung-Min Lee
  • Patent number: 7786230
    Abstract: Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising the steps of: a) preparing a catalyst mixture including i) a precatalyst; ii) a first cocatalyst; and iii) a second cocatalyst; and b) subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, wherein the product yield of the prepared polymer is 50% by weight or more based on the total weight of the monomer.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: August 31, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Cheol Yoon, Sung-Ho Chun, Won-Kook Kim, Tae-Sun Lim, Heon Kim, Jung-Min Lee
  • Publication number: 20100174039
    Abstract: A catalyst system capable of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups of monomers, and a method of producing polymers using the same are provided. The catalyst system for polymerization of olefin according to the present invention has good thermal and chemical stability, and thus, in the method of preparing polyolefin using the catalyst system, the deactivation of a catalyst due to a polar functional group of the monomer can be prevented, and thus a high yield of the cyclic olefin polymer with a high molecular weight can be obtained when a ratio of the catalyst to the monomer is 1:5000, and the removal of a catalyst residue is not required.
    Type: Application
    Filed: December 8, 2009
    Publication date: July 8, 2010
    Inventors: Sung Cheol Yoon, Young Chul Won, Young Whan Park, Sung He Chun, Dai Seung Choi, Won Kook Kim, Taesun Lim, Heon Kim, Jungmin Lee, Kyung Lim Paik
  • Publication number: 20100155987
    Abstract: The present invention relates to a method for casting an acryl film, which includes the steps of injecting a material of the acryl film into a space that is formed from a pair of substrates and a gasket positioned between a pair of substrates, and curing the material of the acryl film. The shrinkage ratio of the gasket is not less than 10% after the acryl film is subjected to the curing step, or the shrinkage ratio of the gasket after the acryl film is subjected to the curing step is the same as or larger than the shrinkage ratio of the material of the acryl film.
    Type: Application
    Filed: August 21, 2008
    Publication date: June 24, 2010
    Inventors: Woo-Sung Kim, Won-Kook Kim, Young-Jun Hong, Yang-Gu Kang, Hyeon Choi, Dong-Joo Kwon, Jee-Seon Kim
  • Patent number: 7738063
    Abstract: Provided are a vertically aligned liquid crystal display (VA-LCD) with good viewing angle characteristics, which has liquid crystals with negative dielectric anisotropy (??<0). In the VA-LCD, a polynorbornene based polymer film is used as a protection film and/or as a negative C-plate retardation film for an upper polarization plate and/or a lower polarization plate. Therefore, high contrast characteristics for a front view and an oblique angle view are realized and color change for an oblique angle view can be minimized.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: June 15, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-kun Jeon, Jeong-su Yu, Sergey Belyaev, Won-kook Kim, Sung-ho Chun, Sung-cheol Yoon, Tae-sun Lim, Heon Kim, Jung-min Lee
  • Patent number: 7718744
    Abstract: Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising: preparing a catalyst mixture including i) a precatalyst, containing a Group 10 transition metal having a ligand containing oxygen ions bonded to the metal; ii) a first cocatalyst which is an organic compound containing a Group 15 element; and iii) a second cocatalyst which is capable of providing an anion and weakly coordinating to the metal of the precatalyst; and subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, at a temperature of 80-200° C., the total amount of the organic solvent being 50-800% by weight based on the total weight of the monomer contained in the monomer solution, and the product yield of the polymer being 50% by weight or more based on the total weight of the monomer.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: May 18, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Cheol Yoon, Sung-Ho Chun, Won-Kook Kim, Tae-Sun Lim, Heon Kim, Jung-Min Lee
  • Patent number: 7648937
    Abstract: A catalyst system capable of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups of monomers, and a method of producing polymers using the same are provided. The catalyst system for polymerization of olefin according to the present invention has good thermal and chemical stability, and thus, in the method of preparing polyolefin using the catalyst system, the deactivation of a catalyst due to a polar functional group of the monomer can be prevented, and thus a high yield of the cyclic olefin polymer with a high molecular weight can be obtained when a ratio of the catalyst to the monomer is 1:5000, and the removal of a catalyst residue is not required.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: January 19, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Sung Cheol Yoon, Young Chul Won, Young Whan Park, Sung Ho Chun, Dai Seung Choi, Won Kook Kim, Taesun Lim, Heon Kim, Jungmin Lee, Kyung Lim Paik
  • Publication number: 20090295000
    Abstract: Disclosed is a method of manufacturing a biaxial polynorbornene-film having a compensation film which has good light transmittance and a uniform in-plane retardation value and can function as both a negative C-plate and an A-plate.
    Type: Application
    Filed: July 21, 2009
    Publication date: December 3, 2009
    Inventors: Won Kook Kim, Sung Ho Chun, Kyung Lim Paik, Belyaev Sergey, Malimonenko Nikolai
  • Patent number: 7582339
    Abstract: Disclosed is a method of manufacturing a biaxial polynorbornene-film having a compensation film which has good light transmittance and a uniform in-plane retardation value and can function as both a negative C-plate and an A-plate.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: September 1, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Won Kook Kim, Sung Ho Chun, Kyung Lim Paik, Belyaev Sergey, Malimonenko Nikolai
  • Publication number: 20090192277
    Abstract: A method of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups, moisture and oxygen is provided. According to the olefin polymerization method, deactivation of a catalyst due to polar functional groups of monomers can be prevented, and thus a polyolefin having a high molecular weight can be prepared with a high yield, and the ratio of catalyst to monomer can be less than 1/5000 due to good activity of the catalyst, and thus removal of catalyst residues is not required.
    Type: Application
    Filed: July 5, 2005
    Publication date: July 30, 2009
    Inventors: Sung Cheol Yoon, Young Chul Won, Young Whan Park, Sung Ho Chun, Dai Seung Choi, Won Kook Kim, Tae Sun Lim, Heon Kim, Jung Min Lee, Kyung Lim Paik
  • Patent number: 7524542
    Abstract: The present invention provides a negative C-plate type optical anisotropic film having negative birefringence along the thickness direction. In particular, the present invention provides a film comprising cycloolefin addition polymer, which is prepared by addition polymerizing norbornene-based monomers, a method for preparing the same, and a liquid crystal display comprising the same. The film of the present invention can be used for optical compensation films of a variety of LCD (liquid crystal display) modes because the refractive index alone the thickness direction can be controlled by the kind and amount of functional groups introduced to the cycloolefin addition polymer.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: April 28, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Won-Kook Kim, Sung-Ho Chun, Sung-Cheol Yoon, Tae-Sun Lim, Heon Kim, Jung-Min Lee, Jeong-Su Yu
  • Publication number: 20090092769
    Abstract: Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising: preparing a catalyst mixture including i) a precatalyst, containing a Group 10 transition metal having a ligand containing oxygen ions bonded to the metal; ii) a first cocatalyst which is an organic compound containing a Group 15 element; and iii) a second cocatalyst which is capable of providing an anion and weakly coordinating to the metal of the precatalyst; and subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, at a temperature of 80-200° C., the total amount of the organic solvent being 50-800% by weight based on the total weight of the monomer contained in the monomer solution, and the product yield of the polymer being 50% by weight or more based on the total weight of the monomer.
    Type: Application
    Filed: November 20, 2008
    Publication date: April 9, 2009
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Cheol Yoon, Sung-Ho Chun, Won-Kook Kim, Tae-Sun Lim, Heon Kim, Jung-Min Lee
  • Patent number: 7507426
    Abstract: The present invention relates to a unified polarizing plate, which employs, as a protection layer of a polarizing film, a transparent film that can simultaneously function as a negative C-plate and transparent protection layer of a polarizing film and has negative refractive index toward thickness direction, thereby simultaneously performing functions as a negative C-plate for optical compensation and as a polarizing plate, and a method for preparing the same. The unified polarizing plate has superior durability at high temperature and high humidity compared to those employing TAC as a protection layer, and improves wide view angle of liquid crystal display having positive refractive index toward thickness direction, when the liquid crystal display device is ON or OFF.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: March 24, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Won-Kook Kim, Sung-Ho Chun, Sung-Cheol Yoon, Tae-Sun Lim, Heon Kim, Jung-Min Lee, Jeong-Su Yu, In-Seok Hwang, Beom-Seok Kim
  • Publication number: 20080319157
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Application
    Filed: April 4, 2008
    Publication date: December 25, 2008
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Ho CHUN, Won-Kook KIM, Sung-Cheol YOON, Tae-Sun LIM, Heon KIM, Kyoung-Hoon KIM, Jung-Min LEE, Kyung-Lim PAIK, Sang-Doo AHN