Patents by Inventor Kum-hyoung Lee

Kum-hyoung 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).

  • Patent number: 11359118
    Abstract: The an adhesive composition characterized in that the kisstack, which is defined as the force measured when a sheet coated with the adhesive composition is instantaneously peeled off after being attached, is about 6 N/inch or higher. The composition not only has excellent loop tack but also exhibits high kisstack characteristics, and thus can be widely used for various substrates.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: June 14, 2022
    Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
  • Publication number: 20220154051
    Abstract: An aqueous acrylic pressure-sensitive adhesive composition, a method of preparing the same and a pressure-sensitive adhesive sheet including the same are disclosed herein. In some embodiments, an aqueous acrylic pressure-sensitive adhesive composition includes a copolymer including 20 to 99% by weight of an alkyl (meth)acrylate monomer, greater than 0 and 3% or less by weight of an acrylate monomer including a hydroxy group and greater than 0 and 3% or less by weight of an unsaturated carboxylic acid, and an anionic surfactant, wherein the anionic surfactant is present in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the copolymer, and wherein the copolymer has an average particle diameter of 500 nm or less and satisfies Equation 1.
    Type: Application
    Filed: December 24, 2020
    Publication date: May 19, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Kum Hyoung Lee, Seung Hun Yang, Yoon Jung Kim
  • Patent number: 11192088
    Abstract: The present invention relates to superabsorbent polymer having an improved absorption speed through micropores formed inside, and a method for preparing the same.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: December 7, 2021
    Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang
  • Patent number: 10995183
    Abstract: The present invention relates to a superabsorbent polymer having an improved adsorption rate and a high bulk density, and a preparation method thereof.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: May 4, 2021
    Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang, Bo Hyun Seong
  • Patent number: 10450428
    Abstract: The present invention relates to a method for preparing superabsorbent polymer. According to the preparation method of the present invention, by maintaining the hydrophilicity of superabsorbent polymer and appropriately controlling the crosslinking density, superabsorbent polymer with excellent properties can be prepared though homogeneous surface crosslinking. Thus, superabsorbent polymer with improved absorption speed can be provided without decrease in absorbency under load.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: October 22, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Ye Sol Yang, Gi Cheul Kim, Kum Hyoung Lee
  • Publication number: 20190218433
    Abstract: An adhesive composition characterized in that the kisstack, which is defined as the force measured when a sheet coated with the adhesive composition is instantaneously peeled off after being attached, is about 6 N/inch or higher. The composition not only has excellent loop tack but also exhibits high kisstack characteristics, and thus can be widely used for various substrates.
    Type: Application
    Filed: December 21, 2017
    Publication date: July 18, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
  • Patent number: 10144809
    Abstract: The present invention relates to a method for preparing super absorbent polymer, and the method for preparing super absorbent polymer according to the present invention may reduce the content of non-reacted monomers in the super absorbent polymer, by using three kinds of polymerization initiators.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: December 4, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
  • Publication number: 20180273705
    Abstract: The present invention relates to a method for preparing superabsorbent polymer. According to the preparation method of the present invention, by maintaining the hydrophilicity of superabsorbent polymer and appropriately controlling the crosslinking density, superabsorbent polymer with excellent properties can be prepared though homogeneous surface crosslinking. Thus, superabsorbent polymer with improved absorption speed can be provided without decrease in absorbency under load.
    Type: Application
    Filed: December 1, 2016
    Publication date: September 27, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Ye Sol Yang, Gi Cheul Kim, Kum Hyoung Lee
  • Patent number: 10066061
    Abstract: The present invention relates to a method for preparing super absorbent polymer, and the method for preparing super absorbent polymer according to the present invention may reduce the content of non-reacted monomers in the super absorbent polymer, by using three kinds of polymerization initiators.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: September 4, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
  • Patent number: 10052611
    Abstract: Provided is a method of preparing a superabsorbent polymer. In the method of preparing the superabsorbent polymer according to the present disclosure, a polymer resulting from polymerization of ethylene-based unsaturated monomers is subjected to a reassembling process by mixing with a compound of a particular Chemical Formula and water. According to the preparation method of the present disclosure, provided is a method of preparing a superabsorbent polymer having improved water holding capacity and a reduced content of residual monomers, thereby improving quality of final polymer products.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: August 21, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Seung Mo Lee, Gi Cheul Kim, Sang Gi Lee, Kum Hyoung Lee, Se Yeol Park
  • Publication number: 20180194904
    Abstract: The present invention relates to a superabsorbent polymer having an improved adsorption rate and a high bulk density, and a preparation method thereof.
    Type: Application
    Filed: November 4, 2016
    Publication date: July 12, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang, Bo Hyun Seong
  • Publication number: 20180043332
    Abstract: The present invention relates to superabsorbent polymer having an improved absorption speed through micropores formed inside, and a method for preparing the same.
    Type: Application
    Filed: April 14, 2016
    Publication date: February 15, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang
  • Publication number: 20170297002
    Abstract: Provided is a method of preparing a superabsorbent polymer. In the method of preparing the superabsorbent polymer according to the present disclosure, a polymer resulting from polymerization of ethylene-based unsaturated monomers is subjected to a reassembling process by mixing with a compound of a particular Chemical Formula and water. According to the preparation method of the present disclosure, provided is a method of preparing a superabsorbent polymer having improved water holding capacity and a reduced content of residual monomers, thereby improving quality of final polymer products.
    Type: Application
    Filed: December 10, 2015
    Publication date: October 19, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Seung Mo Lee, Gi Cheul Kim, Sang Gi Lee, Kum Hyoung Lee, Se Yeol Park
  • Publication number: 20170198105
    Abstract: The present invention relates to a method for preparing super absorbent polymer, and the method for preparing super absorbent polymer according to the present invention may reduce the content of non-reacted monomers in the super absorbent polymer, by using three kinds of polymerization initiators.
    Type: Application
    Filed: December 10, 2015
    Publication date: July 13, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
  • Patent number: 9550924
    Abstract: Acrylic pressure-sensitive adhesive including an acrylic copolymer formed by copolymerizing: i) 81 to 96% by weight of an alkyl (meth) acrylic acid ester monomer having a carbon number of an alkyl group of 2 to 14; ii) 1 to 10% by weight of at least one monomer selected from the group consisting of an allyl ester, a vinyl ester and an unsaturated acetate; iii) 1 to 10% by weight of an acrylonitrile monomer; and iv) 0.1 to 2% by weight of a crosslinker including 5 to 15 of an alkylene oxide group, and having two or more groups of an acrylate group, a vinyl group or the combination thereof, and a surface finishing material comprising the same, which is environmentally friendly, has an excellent room temperature and an aging adhesive property, and has an excellent constructability.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: January 24, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Chan Bum Ko, Young Min Kim, Kong Ju Song, Kum Hyoung Lee
  • Patent number: 8822028
    Abstract: Provided is a removable acrylic pressure sensitive adhesive comprising (A) 70-96.5 weight % of (meth)acrylic acid ester monomer having C1-C14 alkyl group; (B) 0.5-27 weight % of one or more functional group containing monomers selected from the group consisting of carboxyl group containing monomer, hydroxyl group containing monomer, epoxy group containing monomer, vinyl ester group containing monomer and cyano group containing monomer; and (C) 0.6-3 weight % of a cross linking agent having 5-13 alkylene oxide groups and acrylate group or vinyl group in 100 weight % of the monomers and the cross linking agent, and the adhesive of the present invention is a water based adhesive and pro-environmental, and demonstrates excellent adhesiveness at room temperature and under aging atmosphere and excellent dimensional stability as well, so that it can be widely used for various pressure sensitive adhesive sheets for outdoor/indoor advertisement, automobile, printing, decorating, etc.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: September 2, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Kong-ju Song, Young-min Kim, Chang-bum Ko, Kum-hyoung Lee
  • Publication number: 20120071053
    Abstract: Disclosed are an acrylic pressure-sensitive adhesive and a surface finishing material comprising the same. More specifically, disclosed is an acrylic pressure-sensitive adhesive that is achieved by including an acrylic copolymer formed by copolymerizing: i) 81 to 96% by weight of an alkyl (meth) acrylic acid ester monomer having a carbon number of an alkyl group of 2 to 14; ii) 1 to 10% by weight of at least one monomer selected from the group consisting of an allyl ester, a vinyl ester and an unsaturated acetate; iii) 1 to 10% by weight of an acrylonitrile monomer; and iv) 0.
    Type: Application
    Filed: September 16, 2010
    Publication date: March 22, 2012
    Inventors: Chang Bum KO, Young Min Kim, Kong Ju Song, Kum Hyoung Lee
  • Patent number: 8071490
    Abstract: An acrylic pressure-sensitive adhesive composition according to the present invention comprises: acrylic copolymer (A) formed by copolymerizing i) alkyl(meth)acrylic acid ester monomer wherein the carbon atom of alkyl group is 2 to 14, ii) monomer having a functional group capable of crosslinking, iii) methyl(meth)acrylate monomer, iv) vinyl acetate monomer, v) glycidyl(meth)acrylate, and vi) crosslinking agent having 5 to 15 of alkyleneoxide groups and at least two acrylate group or vinyl group; and flame retardant (B). The acrylic pressure-sensitive adhesive composition improves the adhesive property and the dispersion of the flame retardant by controlling the crosslinking structure of the acrylic copolymer, such that a surface finishing material comprising the same can have the excellent adhesion and fireproof.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: December 6, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Chang-bum Ko, Young-min Kim, Kong-ju Song, Kum-hyoung Lee
  • Publication number: 20110014465
    Abstract: Provided is a removable acrylic pressure sensitive adhesive comprising (A) 70-96.5 weight % of (meth)acrylic acid ester monomer having C1-C14 alkyl group; (B) 0.5-27 weight % of one or more functional group containing monomers selected from the group consisting of carboxyl group containing monomer, hydroxyl group containing monomer, epoxy group containing monomer, vinyl ester group containing monomer and cyano group containing monomer; and (C) 0.6-3 weight % of a cross linking agent having 5-13 alkylene oxide groups and acrylate group or vinyl group in 100 weight % of the monomers and the cross linking agent, and the adhesive of the present invention is a water based adhesive and pro-environmental, and demonstrates excellent adhesiveness at room temperature and under aging atmosphere and excellent dimensional stability as well, so that it can be widely used for various pressure sensitive adhesive sheets for outdoor/indoor advertisement, automobile, printing, decorating, etc.
    Type: Application
    Filed: July 7, 2010
    Publication date: January 20, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Kong-ju Song, Young-min Kim, Chang-bum Ko, Kum-hyoung Lee
  • Publication number: 20100048077
    Abstract: An acrylic pressure-sensitive adhesive composition according to the present invention comprises: acrylic copolymer (A) formed by copolymerizing i) alkyl (meth) acrylic acid ester monomer wherein the carbon atom of alkyl group is 2 to 14, ii) monomer having a functional group capable of crosslinking, iii) methyl (meth)acrylate monomer, iv) vinyl acetate monomer, v) glycidyl (meth)acrylate, and vi) crosslinking agent having 5 to 15 of alkyleneoxide groups and at least two acrylate group or vinyl group; and flame retardant (B). The acrylic pressure-sensitive adhesive composition improves the adhesive property and the dispersion of the flame retardant by controlling the crosslinking structure of the acrylic copolymer, such that a surface finishing material comprising the same can have the excellent adhesion and fireproof.
    Type: Application
    Filed: August 20, 2009
    Publication date: February 25, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Chang-bum Ko, Young-min Kim, Kong-ju Song, Kum-hyoung Lee