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).
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Patent number: 11359118Abstract: 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: GrantFiled: December 21, 2017Date of Patent: June 14, 2022Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
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Publication number: 20220154051Abstract: 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: ApplicationFiled: December 24, 2020Publication date: May 19, 2022Applicant: LG Chem, Ltd.Inventors: Kum Hyoung Lee, Seung Hun Yang, Yoon Jung Kim
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Patent number: 11192088Abstract: The present invention relates to superabsorbent polymer having an improved absorption speed through micropores formed inside, and a method for preparing the same.Type: GrantFiled: April 14, 2016Date of Patent: December 7, 2021Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang
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Patent number: 10995183Abstract: The present invention relates to a superabsorbent polymer having an improved adsorption rate and a high bulk density, and a preparation method thereof.Type: GrantFiled: November 4, 2016Date of Patent: May 4, 2021Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang, Bo Hyun Seong
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Patent number: 10450428Abstract: 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: GrantFiled: December 1, 2016Date of Patent: October 22, 2019Assignee: LG Chem, Ltd.Inventors: Ye Sol Yang, Gi Cheul Kim, Kum Hyoung Lee
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Publication number: 20190218433Abstract: 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: ApplicationFiled: December 21, 2017Publication date: July 18, 2019Applicant: LG Chem, Ltd.Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
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Patent number: 10144809Abstract: 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: GrantFiled: December 10, 2015Date of Patent: December 4, 2018Assignee: LG Chem, Ltd.Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
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Publication number: 20180273705Abstract: 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: ApplicationFiled: December 1, 2016Publication date: September 27, 2018Applicant: LG Chem, Ltd.Inventors: Ye Sol Yang, Gi Cheul Kim, Kum Hyoung Lee
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Patent number: 10066061Abstract: 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: GrantFiled: December 10, 2015Date of Patent: September 4, 2018Assignee: LG Chem, Ltd.Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
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Patent number: 10052611Abstract: 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: GrantFiled: December 10, 2015Date of Patent: August 21, 2018Assignee: LG Chem, Ltd.Inventors: Seung Mo Lee, Gi Cheul Kim, Sang Gi Lee, Kum Hyoung Lee, Se Yeol Park
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Publication number: 20180194904Abstract: The present invention relates to a superabsorbent polymer having an improved adsorption rate and a high bulk density, and a preparation method thereof.Type: ApplicationFiled: November 4, 2016Publication date: July 12, 2018Applicant: LG Chem, Ltd.Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang, Bo Hyun Seong
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Publication number: 20180043332Abstract: The present invention relates to superabsorbent polymer having an improved absorption speed through micropores formed inside, and a method for preparing the same.Type: ApplicationFiled: April 14, 2016Publication date: February 15, 2018Applicant: LG Chem, Ltd.Inventors: Kum Hyoung Lee, Gi Cheul Kim, Sung Soo Park, Ye Sol Yang
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Publication number: 20170297002Abstract: 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: ApplicationFiled: December 10, 2015Publication date: October 19, 2017Applicant: LG Chem, Ltd.Inventors: Seung Mo Lee, Gi Cheul Kim, Sang Gi Lee, Kum Hyoung Lee, Se Yeol Park
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Publication number: 20170198105Abstract: 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: ApplicationFiled: December 10, 2015Publication date: July 13, 2017Applicant: LG Chem, Ltd.Inventors: Seung Mo Lee, Gi Cheul Kim, Kum Hyoung Lee, Se Yeol Park
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Patent number: 9550924Abstract: 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: GrantFiled: September 16, 2010Date of Patent: January 24, 2017Assignee: LG Chem, Ltd.Inventors: Chan Bum Ko, Young Min Kim, Kong Ju Song, Kum Hyoung Lee
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Patent number: 8822028Abstract: 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: GrantFiled: July 7, 2010Date of Patent: September 2, 2014Assignee: LG Chem, Ltd.Inventors: Kong-ju Song, Young-min Kim, Chang-bum Ko, Kum-hyoung Lee
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Publication number: 20120071053Abstract: 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: ApplicationFiled: September 16, 2010Publication date: March 22, 2012Inventors: Chang Bum KO, Young Min Kim, Kong Ju Song, Kum Hyoung Lee
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Patent number: 8071490Abstract: 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: GrantFiled: August 20, 2009Date of Patent: December 6, 2011Assignee: LG Chem, Ltd.Inventors: Chang-bum Ko, Young-min Kim, Kong-ju Song, Kum-hyoung Lee
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Publication number: 20110014465Abstract: 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: ApplicationFiled: July 7, 2010Publication date: January 20, 2011Applicant: LG CHEM, LTD.Inventors: Kong-ju Song, Young-min Kim, Chang-bum Ko, Kum-hyoung Lee
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Publication number: 20100048077Abstract: 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: ApplicationFiled: August 20, 2009Publication date: February 25, 2010Applicant: LG CHEM, LTD.Inventors: Chang-bum Ko, Young-min Kim, Kong-ju Song, Kum-hyoung Lee