Patents by Inventor Jun-wye Lee
Jun-wye 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: 11712678Abstract: The present invention relates to a method for preparing superabsorbent polymer. The method for preparing superabsorbent polymer according to the present invention enables providing superabsorbent polymer having excellent absorption ratio, absorption speed and permeability.Type: GrantFiled: December 26, 2017Date of Patent: August 1, 2023Inventors: Dong Hyun Kim, Tae Bin Ahn, Jun Wye Lee, Chang Sun Han
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Patent number: 10894844Abstract: Provided are a superabsorbent polymer having a high bulk density value and showing a reduction in unpleasant odors which may be caused by various additives included in a preparation process while basically maintaining excellent absorption performance and absorption rate, and a preparation method thereof.Type: GrantFiled: June 26, 2018Date of Patent: January 19, 2021Inventors: Yong Hun Lee, Tae Young Won, Jun Wye Lee, Kwangin Shin, Chang Hun Han
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Patent number: 10829635Abstract: The present disclosure relates to an economical method of preparing a resin composition including a polyalkylene carbonate with improved thermal stability and processability. More specifically, the method of preparing a resin composition includes the steps of polymerizing carbon dioxide and an epoxide compound in the presence of a zinc-based catalyst and a solvent, recovering monomers, removing the catalyst and recovering raw materials, solution-blending with a thermostable resin to improve the thermal stability and processability, and removing the solvent and byproducts from the reaction mixture by using an agitated flash drum and an extrusion or kneader-type devolatilizer.Type: GrantFiled: March 8, 2017Date of Patent: November 10, 2020Assignee: LG Chem, Ltd.Inventors: Jun Wye Lee, Seung Young Park, Jin Woo Lee, Hyun Ju Cho, Jung Min Sohn, Yoon Jung Kim, Bo Hyun Seong, Taek Jun Jung, Yun Ki Cho, Yong Hee An, Sung-Kyoung Kim, Hyun Min Kim
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Publication number: 20200164344Abstract: The present invention relates to a method for preparing superabsorbent polymer. The method for preparing superabsorbent polymer according to the present invention enables providing superabsorbent polymer having excellent absorption ratio, absorption speed and permeability.Type: ApplicationFiled: December 26, 2017Publication date: May 28, 2020Applicants: LG Chem, Ltd., LG Chem, Ltd.Inventors: Dong Hyun Kim, Tae Bin Ahn, Jun Wye Lee, Chang Sun Han
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Patent number: 10640610Abstract: The present invention relates to an organozinc-supported catalyst, a method for producing the same, and a method for preparing a polyalkylene carbonate resin using the catalyst. The organozinc-supported catalyst provided by the present invention includes a zinc dicarboxylate-based catalyst supported on a zinc compound layer formed on at least a portion of a support surface, and can be used repeatedly or continuously while exhibiting improved selectivity in the polymerization process for preparing a polyalkylene carbonate resin.Type: GrantFiled: March 17, 2017Date of Patent: May 5, 2020Assignee: LG CHEM LTD.Inventors: Jun Wye Lee, Il Ha Lee, Seung Young Park, Ki-Hwan Kim, Sung-Kyoung Kim
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Patent number: 10577462Abstract: The present invention relates to a production method of polyalkylene carbonate particles capable of precipitating and separating resin particles from a polyalkylene carbonate suspension obtained through polymerization of an epoxide and carbon dioxide. According to the present invention, the production method is capable of obtaining a polyalkylene carbonate resin having excellent workability with a high yield and a low energy cost while reducing a scale of a facility, a processing time, and a wastewater amount, as compared to conventional methods such as a flash separation method.Type: GrantFiled: November 4, 2015Date of Patent: March 3, 2020Assignee: LG Chem, Ltd.Inventors: Woo Sung Hwang, Jong-Ku Lee, Seung Young Park, Dong Kwon Lee, Hyun Ju Cho, Kwang Hyon Kim, Yong Hee An, Jun Wye Lee
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Patent number: 10457773Abstract: A method of preparing a polyalkylene carbonate resin is provided. More particularly, a method of preparing a polyalkylene carbonate resin capable of preventing polymer degradation and improving physical properties and quality of a final resin product, in which, after polymerization of polyalkylene carbonate, by-products are removed by using a large amount of water to purify a reaction mixture, and in a subsequence process of removing a catalyst residue, a primary purification method is conducted by using a filter so that a content of the catalyst in the reaction mixture is less than 1% by weight, is provided.Type: GrantFiled: December 8, 2015Date of Patent: October 29, 2019Assignee: LG Chem, Ltd.Inventors: Jung Min Sohn, Seung Young Park, Jin Woo Lee, Yoon Jung Kim, Taek Jun Jung, Yun Ki Cho, Yong Hee An, Jun Wye Lee
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Publication number: 20190194367Abstract: Provided are a superabsorbent polymer having a high bulk density value and showing a reduction in unpleasant odors which may be caused by various additives included in a preparation process while basically maintaining excellent absorption performance and absorption rate, and a preparation method thereof.Type: ApplicationFiled: June 26, 2018Publication date: June 27, 2019Applicant: LG Chem, Ltd.Inventors: Yong Hun Lee, Tae Young Won, Jun Wye Lee, Kwangin Shin, Chang Hun Han
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Publication number: 20190010283Abstract: The present invention relates to an organozinc-supported catalyst, a method for producing the same, and a method for preparing a polyalkylene carbonate resin using the catalyst. The organozinc-supported catalyst provided by the present invention includes a zinc dicarboxylate-based catalyst supported on a zinc compound layer formed on at least a portion of a support surface, and can be used repeatedly or continuously while exhibiting improved selectivity in the polymerization process for preparing a polyalkylene carbonate resin.Type: ApplicationFiled: March 17, 2017Publication date: January 10, 2019Inventors: Jun Wye LEE, Il Ha LEE, Seung Young PARK, Ki-Hwan KIM, Sung-Kyoung KIM
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Publication number: 20180305542Abstract: The present disclosure relates to an economical method of preparing a resin composition including a polyalkylene carbonate with improved thermal stability and processability. More specifically, the method of preparing a resin composition includes the steps of polymerizing carbon dioxide and an epoxide compound in the presence of a zinc-based catalyst and a solvent, recovering monomers, removing the catalyst and recovering raw materials, solution-blending with a thermostable resin to improve the thermal stability and processability, and removing the solvent and byproducts from the reaction mixture by using an agitated flash drum and an extrusion or kneader-type devolatilizer.Type: ApplicationFiled: March 8, 2017Publication date: October 25, 2018Applicant: LG CHEM, LTD.Inventors: Jun Wye LEE, Seung Young PARK, Jin Woo LEE, Hyun Ju CHO, Jung Min SOHN, Yoon Jung KIM, Bo Hyun SEONG, Taek Jun JUNG, Yun Ki CHO, Yong Hee AN, Sung-Kyoung KIM, Hyun Min KIM
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Patent number: 10100147Abstract: An organic zinc catalyst having more uniform and fine particle size and showing more improved activity in a polymerization process for the preparation of a poly(alkylene carbonate) resin and a preparation method thereof, and a method of preparing a poly(alkylene carbonate) resin using the organic zinc catalyst, are provided. The preparation method of the organic zinc catalyst includes the steps of surface-treating a zinc precursor with a dispersant, and reacting the surface-treated zinc precursor with dicarboxylic acid to form a zinc dicarboxylate-based catalyst.Type: GrantFiled: June 12, 2015Date of Patent: October 16, 2018Assignee: LG CHEM, LTD.Inventors: Seong Kyun Kang, Sung-Kyoung Kim, Jun Wye Lee, Eun Kyoung Park, Seung Young Park, Hyeon Choi
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Patent number: 10047032Abstract: The present invention relates to a preparation method of an organic zinc catalyst capable of preparing an organic zinc catalyst having a finer and more uniform particle size and more improved activity during a polymerization process for preparing a poly(alkylene carbonate) resin, and a preparation method of a poly(alkylene carbonate) resin using the organic zinc catalyst. The preparation method of an organic zinc catalyst includes reacting a zinc precursor and a dicarboxylic acid in the presence of a dispersant to form a zinc dicarboxylate-based catalyst, wherein a reaction step is performed under a condition at which the number of moles of the dicarboxylic acid present in a reaction system is larger than that of the zinc precursor throughout the entire reaction step.Type: GrantFiled: June 9, 2015Date of Patent: August 14, 2018Assignee: LG Chem, Ltd.Inventors: Sung Kyoung Kim, Seong Kyun Kang, Jun Wye Lee, Seung Young Park, Hyeon Choi
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Publication number: 20170275423Abstract: The present invention relates to a production method of polyalkylene carbonate particles capable of precipitating and separating resin particles from a polyalkylene carbonate suspension obtained through polymerization of an epoxide and carbon dioxide. According to the present invention, the production method is capable of obtaining a polyalkylene carbonate resin having excellent workability with a high yield and a low energy cost while reducing a scale of a facility, a processing time, and a wastewater amount, as compared to conventional methods such as a flash separation method.Type: ApplicationFiled: November 4, 2015Publication date: September 28, 2017Inventors: Woo Sung HWANG, Jong-Ku LEE, Seung Young PARK, Dong Kwon LEE, Hyun Ju CHO, Kwang Hyon KIM, Yong Hee AN, Jun Wye LEE
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Publication number: 20170226284Abstract: A method of preparing a polyalkylene carbonate resin is provided. More particularly, a method of preparing a polyalkylene carbonate resin capable of preventing polymer degradation and improving physical properties and quality of a final resin product, in which, after polymerization of polyalkylene carbonate, by-products are removed by using a large amount of water to purify a reaction mixture, and in a subsequence process of removing a catalyst residue, a primary purification method is conducted by using a filter so that a content of the catalyst in the reaction mixture is less than 1% by weight, is provided.Type: ApplicationFiled: December 8, 2015Publication date: August 10, 2017Applicant: LG CHEM, LTD.Inventors: Jung Min SOHN, Seung Young PARK, Jin Woo LEE, Yoon Jung KIM, Taek Jun JUNG, Yun Ki CHO, Yong Hee AN, Jun Wye LEE
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Publication number: 20170029563Abstract: An organic zinc catalyst having more uniform and fine particle size and showing more improved activity in a polymerization process for the preparation of a poly(alkylene carbonate) resin and a preparation method thereof, and a method of preparing a poly(alkylene carbonate) resin using the organic zinc catalyst, are provided. The preparation method of the organic zinc catalyst includes the steps of surface-treating a zinc precursor with a dispersant, and reacting the surface-treated zinc precursor with dicarboxylic acid to form a zinc dicarboxylate-based catalyst.Type: ApplicationFiled: June 12, 2015Publication date: February 2, 2017Applicant: LG CHEM, LTD.Inventors: Seong Kyun KANG, Sung-Kyoung KIM, Jun Wye LEE, Eun Kyoung PARK, Seung Young PARK, Hyeon CHOI
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Publication number: 20150361023Abstract: The present invention relates to a preparation method of an organic zinc catalyst capable of preparing an organic zinc catalyst having a finer and more uniform particle size and more improved activity during a polymerization process for preparing a poly(alkylene carbonate) resin, and a preparation method of a poly(alkylene carbonate) resin using the organic zinc catalyst. The preparation method of an organic zinc catalyst includes reacting a zinc precursor and a dicarboxylic acid in the presence of a dispersant to form a zinc dicarboxylate-based catalyst, wherein a reaction step is performed under a condition at which the number of moles of the dicarboxylic acid present in a reaction system is larger than that of the zinc precursor throughout the entire reaction step.Type: ApplicationFiled: June 9, 2015Publication date: December 17, 2015Inventors: Sung Kyoung KIM, Seong Kyun KANG, Jun Wye LEE, Seung Young PARK, Hyeon CHOI
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Publication number: 20150051095Abstract: A method of using a DNA structure includes forming a DNA structure including a plurality of spaces; attaching a DNA building block to the spaces; contacting the DNA building block with a clinical specimen; and separating the DNA building block from the DNA structure. After the DNA building block is separated from the DNA structure, the method may further include attaching a new DNA building block to the spaces. The DNA building block includes a first DNA strand attached to the spaces; and a second DNA strand attached to the first DNA strand.Type: ApplicationFiled: February 28, 2014Publication date: February 19, 2015Applicant: Samsung Electronics Co., Ltd.Inventors: Chang-won LEE, Sung-ha PARK, Jun-young SON, Jun-wye LEE
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Publication number: 20140356857Abstract: Provided is an interparticle spacing material comprising a nucleic acid structure which comprises at least one nucleic acid lattice comprising a double helix domain; and at least one metal particle which is in contact with a plane of the nucleic acid lattice, in a direction extending obliquely or perpendicularly away from the plane; wherein the double helix domain comprises a hybridization area in which a single strand is hybridized with another single strand.Type: ApplicationFiled: May 23, 2014Publication date: December 4, 2014Applicants: Samsung Electronics Co., Ltd., Sungkyunkwan University Foundation for Corporate CollaborationInventors: Myoung-soon KIM, Sung-ha Park, Jun-wye Lee, Jong-myeon Park, Nam Huh