Patents by Inventor Dae Woo Nam

Dae Woo Nam 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).

  • Publication number: 20210221939
    Abstract: The present disclosure relates to an expanded foam solution for forming a thermosetting expanded foam having excellent flame retardancy produced using the same. According to the present disclosure, nanoclay is mixed with a polyol-based compound using ultrasonic waves, an isocyanate-based compound is added, and a trimerization catalyst or an isocyanurate compound is mixed with the polyol-based compound so that an isocyanurate structure is formed.
    Type: Application
    Filed: April 8, 2021
    Publication date: July 22, 2021
    Inventors: Jong Hyun YOON, Sang Yun LEE, Dae Woo NAM
  • Patent number: 11046819
    Abstract: A super absorbent polymer according to the present invention has excellent dryness while maintaining excellent absorption performance, and thus is preferably used for hygienic materials such as diapers, and can exhibit excellent performance.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: June 29, 2021
    Inventors: Dae Woo Nam, Jun Kyu Kim, Hyung Ki Yoon, Tae Hwan Jang, Bo Hyun Seong, Yeon Woo Hong, Su Jin Kim, Seong Beom Heo, Seon Jung Jung, Ji Yoon Jeong
  • Publication number: 20210189074
    Abstract: A super absorbent polymer according to the present invention has excellent dryness while maintaining excellent absorption performance, and thus is preferably used for hygienic materials such as diapers, and can exhibit excellent performance.
    Type: Application
    Filed: March 9, 2021
    Publication date: June 24, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Dae Woo Nam, Jun Kyu Kim, Hyung Ki Yoon, Tae Hwan Jang, Bo Hyun Seong, Yeon Woo Hong, Su Jin Kim, Seong Beom Heo, Seon Jung Jung, Ji Yoon Jeong
  • Publication number: 20210171736
    Abstract: Proposed are an organic-inorganic composite synthetic resin using a highly flame-retardant organically modified nanoparticle, and a production method thereof. The method for producing the organic-inorganic composite synthetic resin using a highly flame-retardant organically modified nanoparticle a includes the steps of: adding and stirring metal ion-based phosphinate, melamine cyanurate, and nanoclay to a container containing an aqueous or oily solvent, applying ultrasonic waves and high pressure energy to the stirred solution to prepare a highly flame-retardant organically modified silicate solution through a chemical bonding, and then adding a synthetic resin to form synthetic leather and foam used as life consumer goods to the silicate solution, processing and drying it.
    Type: Application
    Filed: February 4, 2021
    Publication date: June 10, 2021
    Inventors: Jong Hyun YOON, Sang Yun LEE, Dae Woo NAM, Dong Eui KIM
  • Publication number: 20210171737
    Abstract: Proposed are an organic-inorganic composite synthetic resin using a highly flame-retardant organically modified nanoparticle, and a production method thereof. The method for producing the organic-inorganic composite synthetic resin using a highly flame-retardant organically modified nanoparticle includes the steps of: adding and stirring metal ion-based phosphinate, melamine cyanurate, and nanoclay to a container containing an aqueous or oily solvent, applying ultrasonic waves and high pressure energy to the stirred solution to prepare a highly flame-retardant organically modified silicate solution through a chemical bonding, and then adding a synthetic resin to form synthetic leather and foam used as life consumer goods to the silicate solution, processing and drying it.
    Type: Application
    Filed: February 4, 2021
    Publication date: June 10, 2021
    Inventors: Jong Hyun YOON, Sang Yun LEE, Dae Woo NAM, Dong Eui KIM
  • Publication number: 20210163693
    Abstract: Provided are a superabsorbent polymer and a preparation method thereof. According to the present invention, a superabsorbent polymer having high centrifuge retention capacity and absorption rate may be prepared by using a specific foam stabilizer.
    Type: Application
    Filed: February 10, 2021
    Publication date: June 3, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Hyung Ki Yoon, Yeon Woo Hong, Seong Beom Heo, Dae Woo Nam, Tae Hwan Jang, Jun Kyu Kim, Bo Hyun Seong, Su Jin Kim, Seon Jung Jung, Ji Yoon Jeong
  • Patent number: 11020725
    Abstract: A superabsorbent polymer according to the present invention has excellent initial absorption properties, and thus it may be used in sanitary materials such as diapers, etc., thereby exhibiting excellent performances.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: June 1, 2021
    Inventors: Jun Kyu Kim, Hyung Ki Yoon, Dae Woo Nam, Bo Hyun Seong, Yeon Woo Hong, Seong Beom Heo, Seon Jung Jung, Ji Yoon Jeong, Tae Hwan Jang, Su Jin Kim
  • Publication number: 20210147640
    Abstract: Provided are a superabsorbent polymer and a preparation method thereof, including preparing a base resin and conducting surface modification of the base resin in the presence of an inorganic filler. The method of preparing the superabsorbent polymer of the present invention may provide a superabsorbent polymer having improved rewetting property and liquid permeability.
    Type: Application
    Filed: September 17, 2019
    Publication date: May 20, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Young Jae Hur, Dae Woo Nam, Bohee Park, Sujin Kim
  • Publication number: 20210113989
    Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. According to the method for preparing superabsorbent polymer of the present invention, superabsorbent polymer having improved rewet property and absorption speed can be provided.
    Type: Application
    Filed: November 28, 2018
    Publication date: April 22, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Young Jae Hur, Dae Woo Nam, Bohee Park, Seongbeom Heo
  • Patent number: 10961356
    Abstract: Provided are a superabsorbent polymer and a preparation method thereof. According to the present invention, a superabsorbent polymer having high centrifuge retention capacity and absorption rate may be prepared by using a specific foam stabilizer.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: March 30, 2021
    Inventors: Hyung Ki Yoon, Yeon Woo Hong, Seong Beom Heo, Dae Woo Nam, Tae Hwan Jang, Jun Kyu Kim, Bo Hyun Seong, Su Jin Kim, Seon Jung Jung, Ji Yoon Jeong
  • Publication number: 20210069674
    Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. The present invention can provide a superabsorbent polymer in which a hydrophobic material having an HLB of 0-6 and a surface cross-linking agent are mixed into a base resin prepared in the presence of water dispersible silica, thereby having improved rewetting characteristics and permeability through surface-modification of the base resin.
    Type: Application
    Filed: December 7, 2018
    Publication date: March 11, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Seonjung Jung, Dae Woo Nam, Bo Hyun Seong, Hyungki Yoon
  • Patent number: 10927223
    Abstract: The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 ?m or less, and a base resin having a particle size of 150 ?m or more and 850 ?m or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 ?m or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: February 23, 2021
    Inventors: Dae Woo Nam, Kyung Moo Lee, Jae Hong Lee, Chang Sun Han
  • Publication number: 20210040271
    Abstract: A superabsorbent polymer having optimized gel strength and exhibiting an improved absorption rate without increasing a specific surface area by chemical foaming or a physical method, and a preparation method thereof, are provided.
    Type: Application
    Filed: June 11, 2019
    Publication date: February 11, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Yong Hun Lee, Mookon Kim, Dae Woo Nam, Hyemi Nam, Sang Gi Lee, Chang Hun Lee, Jiyoon Jeong, Chang Hun Han
  • Publication number: 20210023529
    Abstract: Provided is a method of preparing a superabsorbent polymer. More specifically, provided is a method of preparing a superabsorbent polymer capable of exhibiting improved initial absorbency and a rapid absorption rate by polymerizing monomers having acidic groups, of which part is neutralized with a basic material including potassium hydroxide, in the presence of an encapsulated foaming agent.
    Type: Application
    Filed: December 10, 2019
    Publication date: January 28, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Seul Ah Lee, Gicheul Kim, Dae Woo Nam, Ki Hyun Kim, Jun Kyu Kim, Young Jae Hur
  • Publication number: 20210009725
    Abstract: The present invention relates to super absorbent polymer and a method for preparing the same. According to the super absorbent polymer and preparation method for the same of the present invention, super absorbent polymer having improved rewet property and vortex time can be provided.
    Type: Application
    Filed: March 20, 2019
    Publication date: January 14, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Dae Woo Nam, Ki Hyun Kim, Jun Kyu Kim, Young Jae Hur
  • Patent number: 10843170
    Abstract: A superabsorbent polymer having high centrifuge retention capacity and absorption rate prepared by using a particular foam stabilizer and a polymerization initiator. The foam stabilizer includes a sucrose ester and a polyalkylene oxide, and polymerization initiator includes a photoinitiator and a cationic azo-based initiator.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: November 24, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Yeon Woo Hong, Seong Beom Heo, Hyung Ki Yoon, Dae Woo Nam, Tae Hwan Jang, Jun Kyu Kim, Bo Hyun Seong, Su Jin Kim, Seon Jung Jung, Ji Yoon Jeong
  • Patent number: 10821418
    Abstract: The present invention relates to a super absorbent polymer exhibiting more improved liquid permeability and/or absorption rate while maintaining excellent absorption performance. Such super absorbent polymer comprises a base polymer powder including a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface cross-linked layer formed on the base polymer powder and including a second cross-linked polymer in which the first cross-linked polymer is further cross-linked through an alkylene carbonate having 2 to 5 carbon atoms, and satisfies predetermined physical properties.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: November 3, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Dae Woo Nam, Chang Sun Han, Hyemin Lee, Hwayoon Jung, Hyung Ki Yoon
  • Publication number: 20200308352
    Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. The present invention can provide a superabsorbent polymer in which a hydrophobic material having an HLB of 0-6, a hydrophilic polymer and a surface cross-linking agent are mixed into a base resin, thereby having improved rewetting characteristics and permeability through surface-modification of the base resin.
    Type: Application
    Filed: November 29, 2018
    Publication date: October 1, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Bohee Park, Dae Woo Nam, Young Jae Hur, Yeon Woo Hong, Jiyoon Jeong
  • Patent number: 10773237
    Abstract: The present invention relates to a method for preparing a super absorbent polymer exhibiting improved liquid permeability, gel strength, absorption rate and the like while maintaining excellent absorption performance. The method for preparing the super absorbent polymer comprises the steps of: carrying out a crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent to form a hydrogel polymer including a cross-linked polymer; drying, pulverizing, and classifying the hydrogel polymer to form a base polymer powder; and surface-crosslinking the base polymer powder by using a surface crosslinking liquid containing a surface crosslinking agent of an alkylene carbonate having 2 to 5 carbon atoms, in the presence of hydrophobic silica particles having a water-contact angle of more than 10° and 150° or less and hydrophilic silica particles having a water-contact angle of 10° or less.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: September 15, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyung Ki Yoon, Dae Woo Nam, Hyemin Lee, Chang Sun Han, Sung Jong Seo
  • Publication number: 20200207929
    Abstract: The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 ?m or less, and a base resin having a particle size of 150 ?m or more and 850 ?m or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 ?m or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Dae Woo Nam, Kyung Moo Lee, Jae Hong Lee, Chang Sun Han