Patents by Inventor Yun Ki Cho

Yun Ki Cho 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: 10633511
    Abstract: Provided are a plasticizer composition, a method of preparing the same, and a resin composition including the same. The plasticizer composition is a mixed composition of cyclohexane 1,3-diester-based materials prepared by transesterification and hydrogenation, and when used in the resin composition, exhibits excellent resistance to stress, and excellent physical properties such as migration resistance and volatility resistance as well as tensile strength and an elongation rate.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: April 28, 2020
    Assignee: LG CHEM LTD.
    Inventors: Hyun Kyu Kim, Mi Yeon Lee, Yun Ki Cho, Jeong Ju Moon, Joo Ho Kim, Seok Ho Jeong
  • Patent number: 10626247
    Abstract: The present invention relates to a plasticizer composition, a resin composition, and preparation methods therefor, and can provide: a plasticizer capable of improving physical properties such as plasticizing efficiency, migration, tensile strength, elongation, stress migration and light resistance, which are required in sheet formulation, when used as a plasticizer of a resin composition by improving inferior physical properties generated because of structural limitations; and a resin composition containing the same.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: April 21, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Hyun Kyu Kim, Mi Yeon Lee, Yun Ki Cho, Jeong Ju Moon, Joo Ho Kim, Seok Ho Jeong
  • Patent number: 10457773
    Abstract: 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: Grant
    Filed: December 8, 2015
    Date of Patent: October 29, 2019
    Assignee: 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
  • Patent number: 10407560
    Abstract: The present invention relates to a plasticizer composition, a resin composition, and methods for preparing the same. The present invention can provide: a plasticizer capable of improving properties, such as plasticization efficiency, transitivity, tensile strength, elongation, and tension/elongation retention, required when a resin composition is used as a plasticizer by improving poor properties caused due to structural limitations; and a resin composition containing the same.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: September 10, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Kyu Kim, Mi Yeon Lee, Yun Ki Cho, Jeong Ju Moon, Joo Ho Kim, Seok Ho Jeong
  • Publication number: 20190248982
    Abstract: The present invention relates to a plasticizer composition in which three types of cyclohexane 1,4-diester-based compounds prepared through trans-esterification and hydrogenation are mixed, wherein alkyl substituents of the dicarboxylate are a 2-ethylhexyl group and a butyl group or an isobutyl group, which has fewer carbon atoms than the 2-ethylhexyl group, so that the plasticizer composition may exhibit excellent properties in terms of stress resistance, migration resistance, plasticization efficiency, and the like while maintaining an excellent level of tensile strength and elongation rate, when used for a resin composition.
    Type: Application
    Filed: December 26, 2017
    Publication date: August 15, 2019
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Seok Ho JEONG, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM
  • Publication number: 20190248984
    Abstract: The present invention relates to a plasticizer composition, a resin composition including the same, and a method of preparing the same. The plasticizer composition includes a cyclohexane 1,4-diester-based material; and an epoxidized alkyl ester-based material, wherein a weight ratio of the cyclohexane 1,4-diester-based material and the epoxidized alkyl ester-based material is 99:1 to 1:99, and the epoxidized alkyl ester-based material has an oxirane index (O.I.) of 1.5 or more. When the plasticizer composition is used as a plasticizer for a resin composition, properties such as plasticization efficiency, migration ability, tensile strength, elongation rate, migration upon stress, absorption rate, and the like may be improved.
    Type: Application
    Filed: December 11, 2017
    Publication date: August 15, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Kyu KIM, Yun Ki CHO, Jeong Ju MOON, Mi Yeon LEE, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20190241715
    Abstract: The present invention relates to a plasticizer composition, which includes a terephthalate-based material in which alkyl groups bonded to a diester group have a weight average carbon number of greater than 7 and less than 9; and a monobenzoate-based material including one or more compounds represented by Chemical Formula 1, wherein a weight ratio of the terephthalate-based material and the monobenzoate-based material is 99:1 to 1:99. Such a plasticizer composition is environmentally friendly, and can also improve properties such as tensile strength, elongation rate, hardness, and the like and migration resistance to stress so as to be suitable for use.
    Type: Application
    Filed: December 11, 2017
    Publication date: August 8, 2019
    Inventors: Hyun Kyu KIM, Yun Ki CHO, Seok Ho JEONG, Mi Yeon LEE, Jeong Ju MOON
  • Publication number: 20190047938
    Abstract: The present invention relates to a plasticizer composition and a resin composition including the same, and can provide a plasticizer composition in which three types of terephthalate-based materials and three types of cyclohexane 1,4-diester-based materials are mixed, and by which environmental friendliness can be secured, mechanical properties such as tensile strength and an elongation rate, physical properties such as migration properties and volatile loss can be improved to levels equal to or higher than those of existing products, and effects of improving processability and plasticizing efficiency can be expected, and a resin composition including the same.
    Type: Application
    Filed: September 5, 2017
    Publication date: February 14, 2019
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20190048167
    Abstract: The present invention relates to a plasticizer composition and a resin composition including the same, and can provide a plasticizer composition in which a terephthalate-based material and a cyclohexane 1,4-diester-based material are mixed, and the sum of carbon atoms of alkyl groups bonded to the two materials is in the range of 34 to 40, and by which environmental friendliness can be secured, mechanical properties such as tensile strength and an elongation rate and physical properties such as migration properties and volatile loss can be improved to levels equal to or higher than those of existing products, and effects of improving processability and plasticizing efficiency can be expected, and a resin composition including the same.
    Type: Application
    Filed: September 5, 2017
    Publication date: February 14, 2019
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180319953
    Abstract: The present invention relates a plasticizer composition, a resin composition, and a method of preparing the same. A plasticizer capable of improving physical properties, such as plasticizing efficiency, migration, tensile strength, an elongation rate, stress migration and light resistance, which are required for sheet Chemical Formulations when used as a plasticizer of a resin composition, by improving inferior physical properties caused by structural limitations, and a resin composition including the same may be provided.
    Type: Application
    Filed: June 13, 2017
    Publication date: November 8, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180305542
    Abstract: 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: Application
    Filed: March 8, 2017
    Publication date: October 25, 2018
    Applicant: 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
  • Publication number: 20180298161
    Abstract: The present invention relates to a plasticizer composition, a resin composition and methods of preparing the same, and provides a plasticizer which is environmentally friendly so as to be suitable for use, exhibits excellent transparency and adhesiveness, and can be improved in basic properties such as tensile strength, an elongation rate, hardness and the like when used as a plasticizer for a resin composition, and a resin composition including the same.
    Type: Application
    Filed: June 13, 2017
    Publication date: October 18, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180298162
    Abstract: The present invention relates to a plasticizer composition, a resin composition and methods of preparing the same, and provides a plasticizer composition which is environmentally friendly so as to be suitable for use in applications such as a resin for a food wrapping material, exhibits excellent transparency, color and adhesiveness and can maintain or improve mechanical properties such as tensile strength, an elongation rate and hardness when used as a plasticizer of a resin composition, and a resin composition including the same.
    Type: Application
    Filed: June 13, 2017
    Publication date: October 18, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180291178
    Abstract: The present invention relates to a plasticizer composition, a resin composition and a method of preparing the same, and preferably, a plasticizer composition which can be improved in physical properties such as plasticization efficiency, tensile strength and elongation retentions, volatile loss and migration loss, required for a plasticizer composition contained in a vinyl chloride-based resin composition at the same or higher levels than a conventional plasticizer composition, and a resin composition including the same.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 11, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180282512
    Abstract: The present invention relates to a plasticizer composition, a resin composition and a method of preparing the same, particularly, provides an environmentally-friendly plasticizer composition, which is suitable for use as an application to resins for food packaging, has excellent transparency, color and pressure-sensitive adhesion, and is capable of maintaining/improving mechanical properties such as tensile strength, an elongation rate and hardness when used as a plasticizer of the resin composition, and a resin composition including the same.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 4, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180237613
    Abstract: The present invention relates to a plasticizer composition and a resin composition including the same. When the plasticizer composition is used as a plasticizer in the resin composition, the plasticizer composition may be environmentally friendly, may be improved in processability due to an enhanced absorption rate and enhanced plasticization efficiency, may reduce the total amount of the plasticizer to be applied due to improved physical properties such as migration and volatile loss, and may also have excellent mechanical properties due to improved tensile strength and an improved elongation rate as a plasticizer.
    Type: Application
    Filed: May 17, 2017
    Publication date: August 23, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180237614
    Abstract: The present invention relates to a plasticizer composition, a resin composition and methods of preparing the same. When the plasticizer composition is used as a plasticizer in the resin composition, and the plasticizer composition may be environmentally friendly, may be improved in processability due to an enhanced absorption rate and enhanced plasticization efficiency, may reduce the total amount of the plasticizer to be applied due to improved physical properties such as migration and volatile loss, and may also have excellent mechanical properties such as tensile strength and an elongation rate.
    Type: Application
    Filed: May 17, 2017
    Publication date: August 23, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun KI CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180171103
    Abstract: Provided are a plasticizer composition, a resin composition and a method of preparing the same. Particularly, a plasticizer capable of improving physical properties such as plasticization efficiency, migration, tensile strength, elongation rate, stress migration and light fastness, which are required for sheet formulations, when used as a plasticizer for the resin composition by improving poor physical properties generated due to a structural limitation thereof, and a resin composition including the same are provided.
    Type: Application
    Filed: April 17, 2017
    Publication date: June 21, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180163018
    Abstract: Provided are a plasticizer composition, a resin composition and a method of preparing the same. Particularly, a plasticizer capable of improving physical properties such as plasticizer efficiency, migration, tensile strength, elongation rate, stress migration and light resistance, which are required for sheet formulations, when used as a plasticizer for a resin composition by improving poor physical properties generated due to a structural limitation thereof, and a resin composition including the same are provided.
    Type: Application
    Filed: April 17, 2017
    Publication date: June 14, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG
  • Publication number: 20180163019
    Abstract: Provided are a plasticizer composition, a method of preparing the same, and a resin composition including the same. The plasticizer composition is a mixed composition of cyclohexane 1,3-diester-based materials prepared by transesterification and hydrogenation, and when used in the resin composition, exhibits excellent resistance to stress, and excellent physical properties such as migration resistance and volatility resistance as well as tensile strength and an elongation rate.
    Type: Application
    Filed: April 17, 2017
    Publication date: June 14, 2018
    Inventors: Hyun Kyu KIM, Mi Yeon LEE, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG