Patents by Inventor Chang-bum Ko

Chang-bum Ko 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: 10418609
    Abstract: An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit is repeatedly disposed and has same number of electrodes and separators which are alternately disposed and integrally combined, or (b) a structure in which at least two kinds of radical units are disposed in a predetermined order, and an auxiliary unit disposed on at least one among an uppermost part or a lowermost part of the cell stack part. The one kind of radical unit of (a) has a four-layered structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked, and each of the at least two kinds of radical units are stacked by ones in the predetermined order to form the four-layered structure or the repeating structure.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 17, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Ji Won Park, Myung Hoon Ko, Seung Ho Na, Chang Bum Ahn
  • Publication number: 20190127277
    Abstract: The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.
    Type: Application
    Filed: December 8, 2017
    Publication date: May 2, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Publication number: 20180298126
    Abstract: The present disclosure relates to a preparation method for an acrylic acid-based polymer. According to the preparation method for an acrylic acid-based polymer of the present disclosure, unreacted monomers may be reduced and a high quality acrylic acid-based polymer can be prepared. In addition, it is not necessary to increase the time or the temperature in the polymerization step or the aging step, thereby maintaining the high productivity.
    Type: Application
    Filed: January 12, 2017
    Publication date: October 18, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jung Sup Han, Young Sam Kim, Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Patent number: 10029946
    Abstract: Disclosed are a cement composition additive with improved compressive strength and workability, including a polycarboxylic acid copolymer and/or a salt thereof, zinc oxide particles, and a predetermined amount of gluconic acid and/or a salt thereof, and a cement composition containing the same.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: July 24, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Hyo Min Kim, Chang Bum Ko, Imgyu Kim, Dong Jo Ryu
  • Patent number: 9799885
    Abstract: Provided is a binder for secondary battery electrodes comprising polymer particles obtained by polymerizing three or more kinds of monomers wherein the polymer particles have a mean particle diameter of 0.3 ?m to 0.7 ?m. The binder exhibits superior adhesion force to electrode current collectors and excellent support force to the active material and basically improves safety of electrodes, thus providing a secondary battery with superior cycle characteristics.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: October 24, 2017
    Assignee: LG Chem, Ltd.
    Inventors: MinAh Kang, Young-Min Kim, Chang Bum Ko, Ok Sun Kim
  • Publication number: 20170233292
    Abstract: Disclosed are a cement composition additive with improved compressive strength and workability, including a polycarboxylic acid copolymer and/or a salt thereof, zinc oxide particles, and a predetermined amount of gluconic acid and/or a salt thereof, and a cement composition containing the same.
    Type: Application
    Filed: October 22, 2015
    Publication date: August 17, 2017
    Inventors: Hyo Min KIM, Chang Bum KO, Imgyu KIM, Dong Jo RYU
  • Patent number: 9650297
    Abstract: Disclosed are an additive of a cement composition including a cross-linked polycarboxylic copolymer and a cement composition including the same. More particularly, an additive of a cement composition including a polycarboxylic copolymer and/or a salt thereof, wherein the polycarboxylic copolymer is a copolymer of a monomer mixture including an alkoxy polyalkylene glycol mono(meth)acrylic acid ester-based monomer, a (meth)acrylic acid-based monomer, and a cross-linking agent containing 5 to 20 alkylene oxide groups and having two or more acrylate groups or vinyl groups, and a cement composition including the same are disclosed. The additive of the cement composition including the polycarboxylic copolymer according to the present invention controls a cross-linked structure and thereby initial sensitivity and retentivity are improved, and, accordingly, a cement composition having superior long-term workability may be formed.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: May 16, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Chang Bum Ko, Young-Min Kim, Imgyu Kim
  • Patent number: 9413011
    Abstract: Provided is a binder for secondary battery electrodes comprising a polymer obtained by polymerizing three or more kinds of monomers with a reactive emulsifying agent. The binder reduces moisture impregnation, improves dispersibility and enhances adhesive force, thus providing a secondary battery with superior safety and cycle characteristics.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: August 9, 2016
    Assignee: LG Chem, Ltd.
    Inventors: MinAh Kang, Young-Min Kim, Chang Bum Ko, Ok Sun Kim
  • Patent number: 9126867
    Abstract: Disclosed are an additive for cement compositions that includes a polycarboxylic copolymer and a cement composition including the same and, more particularly, an additive for cement compositions that includes a polycarboxylic copolymer and/or a salt thereof, wherein the polycarboxylic copolymer is a copolymer of a monomer mixture including an alkoxy polyalkylene glycol mono(meth)acrylic acid ester-based monomer, a (meth)acrylic acid-based monomer, a (meth)acrylic acid ester-based monomer, and a polyoxyalkylene alkenyl ether sulfate salt and a cement composition including the same.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: September 8, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Chang Bum Ko, Young-Min Kim, Imgyu Kim
  • Publication number: 20150203402
    Abstract: Disclosed are an additive of a cement composition including a cross-linked polycarboxylic copolymer and a cement composition including the same. More particularly, an additive of a cement composition including a polycarboxylic copolymer and/or a salt thereof, wherein the polycarboxylic copolymer is a copolymer of a monomer mixture including an alkoxy polyalkylene glycol mono(meth)acrylic acid ester-based monomer, a (meth)acrylic acid-based monomer, and a cross-linking agent containing 5 to 20 alkylene oxide groups and having two or more acrylate groups or vinyl groups, and a cement composition including the same are disclosed. The additive of the cement composition including the polycarboxylic copolymer according to the present invention controls a cross-linked structure and thereby initial sensitivity and retentivity are improved, and, accordingly, a cement composition having superior long-term workability may be formed.
    Type: Application
    Filed: September 3, 2013
    Publication date: July 23, 2015
    Inventors: Chang Bum Ko, Young-Min Kim, Imgyu Kim
  • Publication number: 20150175484
    Abstract: Disclosed are an additive for cement compositions that includes a polycarboxylic copolymer and a cement composition including the same and, more particularly, an additive for cement compositions that includes a polycarboxylic copolymer and/or a salt thereof, wherein the polycarboxylic copolymer is a copolymer of a monomer mixture including an alkoxy polyalkylene glycol mono(meth)acrylic acid ester-based monomer, a (meth)acrylic acid-based monomer, a (meth)acrylic acid ester-based monomer, and a polyoxyalkylene alkenyl ether sulfate salt and a cement composition including the same.
    Type: Application
    Filed: August 20, 2013
    Publication date: June 25, 2015
    Inventors: Chang Bum Ko, Young-Min Kim, Imgyu Kim
  • 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
  • Patent number: 8652967
    Abstract: Disclosed is an adjuvant for use in simultaneous polishing of a cationically charged material and an anionically charged material, wherein the adjuvant comprises a polyelectrolyte salt containing: (a) a mixture of a linear polyelectrolyte having a weight average molecular weight of 2,000˜50,000 with a graft type polyelectrolyte that has a weight average molecular weight of 1,000˜20,000 and comprises a backbone and a side chain; and (b) a basic material. CMP (chemical mechanical polishing) slurry comprising the above adjuvant and abrasive particles is also disclosed. The adjuvant comprising a mixture of a linear polyelectrolyte with a graft type polyelectrolyte makes it possible to increase polishing selectivity as compared to CMP slurry using the linear polyelectrolyte alone, and to obtain a desired range of polishing selectivity by controlling the ratio of the linear polyelectrolyte to the graft type polyelectrolyte.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: February 18, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Gi Ra Yi, Jong Pil Kim, Jung Hee Lee, Kwang Ik Moon, Chang Bum Ko, Soon Ho Jang, Seung Beom Cho, Young Jun Hong
  • Publication number: 20130216906
    Abstract: Provided is a binder for secondary battery electrodes comprising a polymer obtained by polymerizing three or more kinds of monomers with a reactive emulsifying agent. The binder reduces moisture impregnation, improves dispersibility and enhances adhesive force, thus providing a secondary battery with superior safety and cycle characteristics.
    Type: Application
    Filed: July 13, 2011
    Publication date: August 22, 2013
    Applicant: LG CHEM, LTD.
    Inventors: MinAh Kang, Young-Min Kim, Chang Bum Ko, Ok Sun Kim
  • Publication number: 20130209876
    Abstract: Provided is a binder for secondary battery electrodes comprising polymer particles obtained by polymerizing three or more kinds of monomers wherein the polymer particles have a mean particle diameter of 0.3 ?m to 0.7 ?m. The binder exhibits superior adhesion force to electrode current collectors and excellent support force to the active material and basically improves safety of electrodes, thus providing a secondary battery with superior cycle characteristics.
    Type: Application
    Filed: July 5, 2011
    Publication date: August 15, 2013
    Applicant: LG Chem, Ltd.
    Inventors: MinAh Kang, Young-Min Kim, Chang Bum Ko, Ok Sun Kim
  • Publication number: 20120187333
    Abstract: Disclosed is an adjuvant for use in simultaneous polishing of a cationically charged material and an anionically charged material, wherein the adjuvant comprises a polyelectrolyte salt containing: (a) a mixture of a linear polyelectrolyte having a weight average molecular weight of 2,000˜50,000 with a graft type polyelectrolyte that has a weight average molecular weight of 1,000˜20,000 and comprises a backbone and a side chain; and (b) a basic material. CMP (chemical mechanical polishing) slurry comprising the above adjuvant and abrasive particles is also disclosed. The adjuvant comprising a mixture of a linear polyelectrolyte with a graft type polyelectrolyte makes it possible to increase polishing selectivity as compared to CMP slurry using the linear polyelectrolyte alone, and to obtain a desired range of polishing selectivity by controlling the ratio of the linear polyelectrolyte to the graft type polyelectrolyte.
    Type: Application
    Filed: March 15, 2012
    Publication date: July 26, 2012
    Inventors: Gi Ra Yi, Jong Pil Kim, Jung Hee Lee, Kwang Ik Moon, Chang Bum Ko, Soon Ho Jang, Seung Beom Cho, Young Jun Hong
  • Patent number: 8163650
    Abstract: Disclosed is an adjuvant for use in simultaneous polishing of a cationically charged material and an anionically charged material, which forms an adsorption layer on the cationically charged material in order to increase polishing selectivity of the anionically charged material, wherein the adjuvant comprises a polyelectrolyte salt containing: (a) a mixture of a linear polyelectrolyte having a weight average molecular weight of 2,000˜50,000 with a graft type polyelectrolyte that has a weight average molecular weight of 1,000˜20,000 and comprises a backbone and a side chain; and (b) a basic material. CMP (chemical mechanical polishing) slurry comprising the above adjuvant and abrasive particles is also disclosed.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: April 24, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Gi Ra Yi, Jong Pil Kim, Jung Hee Lee, Kwang Ik Moon, Chang Bum Ko, Soon Ho Jang, Seung Beom Cho, Young Jun Hong
  • Patent number: 8147711
    Abstract: Disclosed is an adjuvant for controlling polishing selectivity when polishing a cationically charged material simultaneously with an anionically charged material. CMP slurry comprising the adjuvant is also disclosed. The adjuvant comprises: (a) a polyelectrolyte that forms an adsorption layer on the cationically charged material in order to increase the polishing selectivity of the anionically charged material; (b) a basic material; and (c) a fluorine-based compound. when the adjuvant for controlling polishing selectivity of CMP slurry according to the present invention is applied to a CMP process, it is possible to increase the polishing selectivity of a silicon oxide layer, to obtain a uniform particle size of CMP slurry, to stabilize variations in viscosity under an external force and to minimize generation of microscratches during a polishing process.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: April 3, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jung Hee Lee, Jong Pil Kim, Gi Ra Yi, Kwang Ik Moon, Chang Bum Ko, Soon Ho Jang, Seung Beom Cho, Young Jun Hong
  • 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