Patents by Inventor Hee Jung CHOI
Hee Jung CHOI 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: 10981146Abstract: The present invention relates to a super-absorbent polymer having excellent properties, both centrifugal retention capacity (CRC) and absorption under pressure (AUP) having been improved by introducing a surface crosslinked layer crosslinked by surface-modified inorganic particles, and to a method for preparing the same. The super-absorbent polymer comprises: a base resin powder containing a crosslinked polymer of water-soluble ethylene-based unsaturated monomers having an at least partially neutralized acidic group; and a surface crosslinked layer formed on the base resin powder, wherein inorganic particles may be chemically bound to the crosslinked polymer contained in the surface crosslinked layer, via an oxygen-containing bond or a nitrogen-containing bond.Type: GrantFiled: December 29, 2015Date of Patent: April 20, 2021Inventors: Sung Soo Park, Gi Cheul Kim, Ju Eun Kim, Hyeon Choi, Hyo Sook Joo, Sung Hyun Park, Hee Jung Choi, Ki Youl Yoon
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Publication number: 20200407231Abstract: Provided is a hydrophobic silica aerogel precursor, and a hydrophobic silica aerogel produced using the same. In the methods, a linear silane crosslinking agent containing a PEG-derived unit is introduced when preparing a hydrophobic aerogel precursor, resulting in the production of a hydrophobic silica aerogel having improved high-temperature thermal stability and improved physical properties.Type: ApplicationFiled: December 7, 2018Publication date: December 31, 2020Inventors: Hee Jung CHOI, Se Hyun KWON, Yeong Rae CHANG, Seok Hoon JANG
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Patent number: 10836925Abstract: Provided is a hydrophilic coating composition, and more particularly, a hydrophilic coating composition including both a block copolymer and a random copolymer, each including repeating units of particular structures, wherein the hydrophilic coating composition may impart a hydrophilic property to the surface of a substrate when applied to the surface, while having excellent adhesiveness to the substrate.Type: GrantFiled: December 26, 2017Date of Patent: November 17, 2020Assignee: LG CHEM, LTD.Inventors: Chang Hwan Ju, Hee Jung Choi, Jeongae Yoon, Yeong Rae Chang, Sung Soo Yoon
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Patent number: 10773964Abstract: Provided are an aerogel precursor, a method for preparing the same, an aerogel prepared therewith, and a method for preparing an aerogel using the same, wherein the aerogel precursor includes a structural unit represented by Formula 1 below and at least one selected from the group consisting of structural units represented by Formulae 2 to 4 in a molar ratio of 100:1 to 100:20, and has a weight average molecular weight of 1,000 g/mol to 6,000 g/mol, and a viscosity of 2.0 to 4.0 cps after heating for 24 hours or more at 45 to 60° C.Type: GrantFiled: August 9, 2017Date of Patent: September 15, 2020Assignee: LG CHEM, LTD.Inventors: Kyoung Shil Oh, Hee Jung Choi, Yeong Rae Chang, Je Kyun Lee
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Patent number: 10655018Abstract: Disclosed are a silica sol composition including silica, an anionic dispersant, a cationic dispersant, an epoxy silane coupling agent, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and a cationic dispersant, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.Type: GrantFiled: April 3, 2015Date of Patent: May 19, 2020Assignee: LG CHEM, LTD.Inventors: Hee-Jung Choi, Seong-Kyun Kang, Hyeon Choi, Jong-Won Lee
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Publication number: 20190315996Abstract: Provided is a hydrophilic coating composition, and more particularly, a hydrophilic coating composition including both a block copolymer and a random copolymer, each including repeating units of particular structures, wherein the hydrophilic coating composition may impart a hydrophilic property to the surface of a substrate when applied to the surface, while having excellent adhesiveness to the substrate.Type: ApplicationFiled: December 26, 2017Publication date: October 17, 2019Applicant: LG CHEM, LTD.Inventors: Chang Hwan JU, Hee Jung CHOI, Jeongae YOON, Yeong Rae CHANG, Sung Soo YOON
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Patent number: 10329438Abstract: Disclosed are a silica sol composition including silica, an anionic dispersant, two or more epoxy silane coupling agents, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and two or more epoxy silane coupling agents, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.Type: GrantFiled: May 29, 2015Date of Patent: June 25, 2019Assignee: LG CHEM, LTD.Inventors: Hee-Jung Choi, Hyung-Kee Kim, Seong-Kyun Kang, Hyeon Choi
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Patent number: 10258962Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. More specifically, the present invention relates to superabsorbent polymer with improved properties, comprising a dual cross-linking structure derived from alkyleneglycol multifunctional (meth)acrylate and modified nanoclay, and a method for preparing the same. According to the present invention, the modified nanoclay and alkyleneglycol multifunctional (meth)acrylate are used as internal crosslinking agents in the process of preparing superabsorbent polymer, thus contributing to improvement in the cross-linking degree and the properties of superabsorbent polymer.Type: GrantFiled: July 30, 2015Date of Patent: April 16, 2019Assignee: LG Chem, Ltd.Inventors: Ju Eun Kim, Gi Cheul Kim, Sung Soo Park, Hyeon Choi, Hee Jung Choi, Hyo Sook Joo, Ki Youl Yoon
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Publication number: 20180319669Abstract: Provided are an aerogel precursor, a method for preparing the same, an aerogel prepared therewith, and a method for preparing an aerogel using the same, wherein the aerogel precursor includes a structural unit represented by Formula 1 below and at least one selected from the group consisting of structural units represented by Formulae 2 to 4 in a molar ratio of 100:1 to 100:20, and has a weight average molecular weight of 1,000 g/mol to 6,000 g/mol, and a viscosity of 2.0 to 4.0 cps after heating for 24 hours or more at 45 to 60° C.Type: ApplicationFiled: August 9, 2017Publication date: November 8, 2018Inventors: Kyoung Shil OH, Hee Jung CHOI, Yeong Rae CHANG, Je Kyun LEE
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Publication number: 20180231690Abstract: The present invention relates to an anti-reflective film including: a hard coating layer; and a low refractive layer that is formed on one side of the hard coating layer, and includes porous inorganic nanoparticles with a diameter of 5 nm to 70 nm including micropores with a diameter of 0.5 nm to 10 nm, and a binder resin, and a method for preparing an anti-reflective film.Type: ApplicationFiled: March 10, 2017Publication date: August 16, 2018Inventors: Jin Seok BYUN, Yeong Rae CHANG, Hee Jung CHOI, Jae Young KIM
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Publication number: 20180162737Abstract: The present disclosure provides an aerogel precursor including an alkoxydisiloxane-based prepolymer and having a functional group derived from a hydrophobic sol-gel forming agent of the following Chemical Formula 1 on a surface thereof, and therefore, capable of enhancing high temperature thermal stability of an aerogel providing hydrophobic pores having uniform pore size distribution when preparing an aerogel, and an aerogel prepared using the same: (in Chemical Formula 1, M, R, R1 to R4 are the same as defined in the specification.Type: ApplicationFiled: December 15, 2016Publication date: June 14, 2018Inventors: Hee Jung CHOI, Kyoung Shil OH, Yeong Rae CHANG, Je Kyun LEE
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Publication number: 20170361305Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. More specifically, the present invention relates to superabsorbent polymer with improved properties, comprising a dual cross-linking structure derived from alkyleneglycol multifunctional (meth)acrylate and modified nanoclay, and a method for preparing the same. According to the present invention, the modified nanoclay and alkyleneglycol multifunctional (meth)acrylate are used as internal crosslinking agents in the process of preparing superabsorbent polymer, thus contributing to improvement in the cross-linking degree and the properties of superabsorbent polymer.Type: ApplicationFiled: July 30, 2015Publication date: December 21, 2017Applicant: LG Chem, Ltd.Inventors: Ju Eun Kim, Gi Cheul Kim, Sung Soo Park, Hyeon Choi, Hee Jung Choi, Hyo Sook Joo, Ki Youl Yoon
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Publication number: 20170326528Abstract: The present invention relates to a super-absorbent polymer having excellent properties, both centrifugal retention capacity (CRC) and absorption under pressure (AUP) having been improved by introducing a surface crosslinked layer crosslinked by surface-modified inorganic particles, and to a method for preparing the same. The super-absorbent polymer comprises: a base resin powder containing a crosslinked polymer of water-soluble ethylene-based unsaturated monomers having an at least partially neutralized acidic group; and a surface crosslinked layer formed on the base resin powder, wherein inorganic particles may be chemically bound to the crosslinked polymer contained in the surface crosslinked layer, via an oxygen-containing bond or a nitrogen-containing bond.Type: ApplicationFiled: December 29, 2015Publication date: November 16, 2017Applicant: LG Chem, Ltd.Inventors: Sung Soo Park, Gi Cheul Kim, Ju Eun Kim, Hyeon Choi, Hyo Sook Joo, Sung Hyun Park, Hee Jung Choi, Ki Youl Yoon
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Patent number: 9751995Abstract: The present invention relates to a superabsorbent polymer that has more improved gel strength and is improved in both water retention capacity (centrifuge retention capacity, CRC) and absorption ability under pressure (AUP) because of an optimized cross-linked structure of a base resin powder inside a cross-linked surface layer, and a preparation method thereof. The superabsorbent polymer includes a base resin powder including a 1st cross-linked polymer of a water-soluble ethylenic unsaturated monomer having acid groups of which at least a part is neutralized, and a cross-linked surface layer that includes a 2nd cross-linked polymer further cross-linked from the 1st cross-linked polymer and is formed on the base resin powder, wherein an inorganic particle is chemically bonded to the 1st cross-linked polymer by the medium of a cross-linking bond, an oxygen-containing bond (—O—), or a nitrogen-containing bond (—NR—, where R is hydrogen or a C1-C3 alkyl or an amide bond).Type: GrantFiled: August 4, 2015Date of Patent: September 5, 2017Assignee: LG CHEM, LTD.Inventors: Hyo Sook Joo, Ki Youl Yoon, Gi Cheul Kim, Ju Eun Kim, Hyeon Choi, Hee Jung Choi, Sung Soo Park, Sung Hyun Park, Myung Han Lee
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Publication number: 20170088721Abstract: Disclosed are a silica sol composition including silica, an anionic dispersant, two or more epoxy silane coupling agents, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and two or more epoxy silane coupling agents, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.Type: ApplicationFiled: May 29, 2015Publication date: March 30, 2017Applicant: LG CHEM, LTD.Inventors: Hee-Jung CHOI, Hyung-Kee KIM, Seong-Kyun KANG, Hyeon CHOI
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Publication number: 20170073478Abstract: The present invention relates to a superabsorbent polymer that has more improved gel strength and is improved in both water retention capacity (centrifuge retention capacity, CRC) and absorption ability under pressure (AUP) because of an optimized cross-linked structure of a base resin powder inside a cross-linked surface layer, and a preparation method thereof. The superabsorbent polymer includes a base resin powder including a 1st cross-linked polymer of a water-soluble ethylenic unsaturated monomer having acid groups of which at least a part is neutralized, and a cross-linked surface layer that includes a 2nd cross-linked polymer further cross-linked from the 1st cross-linked polymer and is formed on the base resin powder, wherein an inorganic particle is chemically bonded to the 1st cross-linked polymer by the medium of a cross-linking bond, an oxygen-containing bond (—O—), or a nitrogen-containing bond (—NR—, where R is hydrogen or a C1-C3 alkyl or an amide bond).Type: ApplicationFiled: August 4, 2015Publication date: March 16, 2017Inventors: Hyo Sook JOO, Ki Youl YOON, Gi Cheul KIM, Ju Eun KIM, Hyeon CHOI, Hee jung CHOI, Sung Soo PARK, Sung Hyun PARK, Myung Han LEE
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Publication number: 20170037265Abstract: Disclosed are a silica sol composition including silica, an anionic dispersant, a cationic dispersant, an epoxy silane coupling agent, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and a cationic dispersant, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.Type: ApplicationFiled: April 3, 2015Publication date: February 9, 2017Applicant: LG CHEM, LTD.Inventors: Hee-Jung CHOI, Seong-Kyun KANG, Hyeon CHOI, Jong-Won LEE
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Patent number: 9200840Abstract: Disclosed herein are a clothes dryer and a control method thereof in which a drying time is adjusted according to wool content during a drying cycle of a wool course. Wool content of woolen textiles is judged by sensing a dryness of the woolen textiles during a drying cycle of a wool course, and a drying time is adjusted according to the wool content, thereby minimizing contraction or deformation of the woolen textiles while satisfying the range of a target dryness set by wool mark standards. Further, only a high-capacity heater is driven during the drying cycle of the wool course, thereby allowing an internal temperature of a rotary drum to keep the optimum temperature without contraction or deformation of the woolen textiles.Type: GrantFiled: August 29, 2013Date of Patent: December 1, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hee Jung Choi, Geun Kang, Do Haeng Kim
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Patent number: 8961919Abstract: A method of preparing silica aero-gel powders having a short preparation time and stable preparation processes. In the method, the silica aerogel powders are generated by using a water glass solution, an inorganic acid, an organosilane compound and an organic solvent. The method includes dispersion-solution generating, gelating and solvent exchanging and drying. In the dispersion-solution generating, a dispersion solution is generated by dispersing the water glass solution and the organosilane compound in the organic solvent. In the gelating and solvent exchanging, silica hydrogel is generated by adding the inorganic acid to the dispersion solution and simultaneously performing gelating and solvent-exchanging. In the drying, the silica aerogel powders are generated by drying the silica hydro-gel.Type: GrantFiled: May 3, 2011Date of Patent: February 24, 2015Assignee: Jios Aerogel LimitedInventors: Young Chul Joung, Myung Je Roe, Young Jong Yoo, Jong Chul Park, Hee Jung Choi, Min Woo Kim
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Publication number: 20130340276Abstract: Disclosed herein are a clothes dryer and a control method thereof in which a drying time is adjusted according to wool content during a drying cycle of a wool course. Wool content of woolen textiles is judged by sensing a dryness of the woolen textiles during a drying cycle of a wool course, and a drying time is adjusted according to the wool content, thereby minimizing contraction or deformation of the woolen textiles while satisfying the range of a target dryness set by wool mark standards. Further, only a high-capacity heater is driven during the drying cycle of the wool course, thereby allowing an internal temperature of a rotary drum to keep the optimum temperature without contraction or deformation of the woolen textiles.Type: ApplicationFiled: August 29, 2013Publication date: December 26, 2013Applicant: Samsung Electronics Co., Ltd.Inventors: Hee Jung CHOI, Geun Kang, Do Haeng Kim