Patents by Inventor Hyung-Tak Lee

Hyung-Tak 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).

  • Publication number: 20230144039
    Abstract: Disclosed are polypropylene thermoplastic resin composition containing a high crystalline homo polypropylene resin, a long glass fiber reinforced material, a modified polypropylene resin, and a nucleating agent having a structure including amino azobenzene or a derivative thereof.
    Type: Application
    Filed: November 2, 2022
    Publication date: May 11, 2023
    Inventors: Kyeong Hoon Jang, Boo Youn An, Dae Sik Kim, Jin Gi Ahn, In Soo Han, Seul Yi, Hyung Tak Lee, Kwang Il Kwon
  • Publication number: 20230024056
    Abstract: The present disclosure provides a thermoplastic resin composition having high rigidity and a low coefficient of linear thermal expansion and a molded article including the same. The thermoplastic resin composition includes a first propylene-ethylene copolymer, a second propylene-ethylene copolymer, a thermoplastic elastomer, an inorganic filler, and a sodium-phosphate-based nucleating agent as appropriate, and thus a molded article produced therefrom can exhibit improved mechanical rigidity, impact resistance, and dimensional stability. Even when formed to a low thickness for weight reduction, the molded article can be imparted with excellent processability, high tensile strength, a high flexural modulus, and high impact strength.
    Type: Application
    Filed: July 6, 2022
    Publication date: January 26, 2023
    Inventors: Jin Young Yoon, Hee Joon Lee, Dong Eun Cha, Sun Jun Kwon, Chun Ho Park, Seung Ryong Jeong, Seok Jin Yong, Hyung Tak Lee
  • Publication number: 20220106447
    Abstract: Disclosed herein are a long glass fiber reinforced thermoplastic resin composition and a molded article including the same. Specifically, the thermoplastic resin composition may include 30% to 70% by weight of polyamide, 20% to 60% by weight of a reinforcing agent which contains a glass fiber and has a flat-plate shape, and 1% to 5% by weight of a silane-based coupling agent.
    Type: Application
    Filed: May 26, 2021
    Publication date: April 7, 2022
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, GS Caltex Corporation
    Inventors: Kyeong Bae Seo, Wan Ki Noh, In Seok Kang, Min Sik Seo, Han Sol Lee, Sang Sun Park, Jae han Park, Hyung Tak Lee, Seok Jin Yong
  • Patent number: 10822483
    Abstract: A polypropylene resin composition includes: a base resin including a propylene homopolymer having a melt index of 20 g/10 min to 35 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg and an ethylene-propylene copolymer having a melt index of 90 g/10 min to 100 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg; a thermoplastic elastomer having a melt index of 10 g/10 min to 40 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg; an inorganic filler; and a sodium phosphate-based nucleating agent.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 3, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, LG Hausys Ltd., GS Caltex
    Inventors: Hyun Gyung Kim, Hee Joon Lee, Seung Jae Lee, Hyung Tak Lee, Ki Hyun Sung, Chun Ho Park
  • Publication number: 20180258267
    Abstract: A polypropylene resin composition includes: a base resin including a propylene homopolymer having a melt index of 20 g/10 min to 35 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg and an ethylene-propylene copolymer having a melt index of 90 g/10 min to 100 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg; a thermoplastic elastomer having a melt index of 10 g/10 min to 40 g/10 min measured at a temperature of 230° C. and under a load of 2.16 kg; an inorganic filler; and a sodium phosphate-based nucleating agent.
    Type: Application
    Filed: December 12, 2017
    Publication date: September 13, 2018
    Inventors: Hyun Gyung Kim, Hee Joon Lee, Seung Jae Lee, Hyung Tak Lee, Ki Hyun Sung, Chun Ho Park
  • Patent number: 9873791
    Abstract: A long carbon fiber reinforced thermoplastic resin composition for foam injection and a molded article manufactured using the same are provided. More particularly, the thermoplastic resin composition and the manufactured molded article may be capable of improving component assembly and stability by minimizing deformation after foam injection molding. Such composition and molded article can be utilized as a component for a vehicle structure such as a panoramic sunroof frame. Also provided herein is a low-density polyamide-6 polymer comprising a long carbon fiber reinforcing agent, a thermoplastic elastomer, a silane-based coupling agent and a sodium phosphate nucleating. The polymer is suitable for foam injection. The thermoplastic resin composition and molded article made of said composition are light weight and economic feasibility as well as having high stiffness, durability, dimensional stability, and a desirable injection appearance.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: January 23, 2018
    Assignees: HYUNDAI MOTOR COMPANY, GS CALTEX
    Inventors: Sang Sun Park, Ji Hyun Jung, Jong Tae Seo, Hyung Tak Lee, Woong Jae Boo
  • Publication number: 20160222208
    Abstract: The present invention relates to a thermoplastic resin composition and a molded article manufactured using the thermoplastic resin composition. Particularly, the thermoplastic resin composition may be reinforced with the carbon fiber. Accordingly, the thermoplastic resin composition may be obtained by mixing a carbon fiber, a silane-based coupling agent and a thermoplastic elastomer to a polyamide-6 polymer having low specific gravity, such that weight thereof may be reduced and economical efficiency may be improved. Further, parts assembly efficiency and stability of the injection molded product from the thermoplastic resin composition of the present invention may be improved by minimizing deformation after injection molding due to improved rigidity, durability and dimensional stability thereof. The thermoplastic resin composition may be used for parts of vehicle exterior material such as a panorama sunroof frame.
    Type: Application
    Filed: December 14, 2015
    Publication date: August 4, 2016
    Inventors: Sang Sun Park, Kyung Min Yu, Kie Youn Jeong, Seok Hwan Kim, Hyung Tak Lee, Woong Jae Boo, Jong Tae Seo
  • Patent number: 8946337
    Abstract: Provided are a thermoplastic resin composition including a thermoplastic resin and an amorphous sheet-shaped metal particle having a ratio of thickness relative to long diameter of about 1:20 to about 1:1, and a molded product using the same.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: February 3, 2015
    Assignee: Cheil Industries Inc.
    Inventors: Hyung-Tak Lee, Doo-Han Ha, Jin-Kyung Cho, Young-Chul Kwon
  • Patent number: 8835558
    Abstract: Disclosed is a polylactic acid/polycarbonate resin composition including (A) a mixed resin including (a1) a polycarbonate resin and (a2) a polylactic acid resin, and (B) a modified acrylic-based resin, and a molded product made using the same.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: September 16, 2014
    Assignee: Cheil Industries Inc.
    Inventors: Hyung-Tak Lee, Doo-Han Ha, Chang-Do Jung, Young-Chul Kwon, Jin-Kyung Cho, Young-Mi Chung, Byung-Choon Lee
  • Patent number: 8367780
    Abstract: A block or graft copolymer including a thermoplastic resin segment and as an aliphatic polyester segment is provided. The copolymer can be used as a compatibilizer for a resin alloy comprising polylactic acid, which can reduce the consumption of petroleum raw materials.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: February 5, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Ji Won Pack, Byeong Do Lee, Chang Do Jung, Hyung Tak Lee
  • Publication number: 20120270988
    Abstract: Provided are a thermoplastic resin composition including a thermoplastic resin and an amorphous sheet-shaped metal particle having a ratio of thickness relative to long diameter of about 1:20 to about 1:1, and a molded product using the same.
    Type: Application
    Filed: June 28, 2012
    Publication date: October 25, 2012
    Applicant: Cheil Industries Inc.
    Inventors: Hyung-Tak Lee, Doo-Han Ha, Jin-Kyung Cho, Young-Chul Kwon
  • Publication number: 20120264869
    Abstract: Provided are a thermoplastic resin composition including a thermoplastic resin and a metal particle obtained by punching that has a ratio of thickness relative to long diameter of about 1:7 to about 1:1, and a molded product using the same.
    Type: Application
    Filed: June 28, 2012
    Publication date: October 18, 2012
    Applicant: Cheil Industries Inc.
    Inventors: Hyung-Tak LEE, Doo-Han HA, Jin-Kyung CHO, Young-Chul KWON
  • Publication number: 20120232184
    Abstract: Provided are an environmentally-friendly polyamide resin composition that includes (A-1) a first polyamide resin including polyamide 11, polyamide 1010, or a combination thereof, (B) a glass fiber having a cross-sectional aspect ratio of about 1.5 or more, and (C) a branched graft copolymer including a polyolefin main chain, and optionally (A-2) second polyamide resin including a C6 organic chain in one repeating unit, and a molded product using the same.
    Type: Application
    Filed: May 24, 2012
    Publication date: September 13, 2012
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young-Chul KWON, Doo-Han HA, Hyung-Tak LEE, Bong-Jae LEE, Chang-Do JUNG
  • Patent number: 8232343
    Abstract: An environmentally-friendly polylactic acid resin composition includes (A) a mixed resin including (a1) a polylactic acid (PLA) resin and (a2) a polycarbonate resin, and (B) a compatibilizer capable of forming a stereo-complex with the polylactic acid resin. According to the present invention, the polylactic acid resin composition is environmentally-friendly and has excellent appearance and improved welding impact strength, as well as improved mechanical strength and heat resistance. Accordingly, it can be used for manufacturing various molded products requiring heat resistance and mechanical strength, for example electronic parts, office machines, miscellaneous goods, and the like.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: July 31, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Young-Mi Chung, Chang-Do Jung, Young-Jun Lee, Ji-Won Pack, Young-Chul Kwon, Hyung-Tak Lee, Jin-Kyung Cho
  • Patent number: 8133943
    Abstract: Disclosed is a polylactic acid/polycarbonate resin composition including (A) about 100 parts by weight of a mixed resin including: (a1)) about 10 to about 90 wt % of a polycarbonate resin and (a2) about 10 to about 90 wt % of a polylactic acid resin; (B) about 1 to about 50 parts by weight of a flame retardant based on about 100 parts by weight of the mixed resin; (C) about 1 to about 30 parts by weight of an acryl-based copolymer based on about 100 parts by weight of the mixed resin; and (D) about 1 to about 20 parts by weight of an impact-reinforcing agent based on about 100 parts by weight of the mixed resin.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: March 13, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Jin-Kyung Cho, Hyung-Tak Lee, Doo-Han Ha, Chang-Do Jung
  • Publication number: 20100160499
    Abstract: Disclosed is a polylactic acid/polycarbonate resin composition including (A) about 100 parts by weight of a mixed resin including: (a1)) about 10 to about 90 wt % of a polycarbonate resin and (a2) about 10 to about 90 wt % of a polylactic acid resin; (B) about 1 to about 50 parts by weight of a flame retardant based on about 100 parts by weight of the mixed resin; (C) about 1 to about 30 parts by weight of an acryl-based copolymer based on about 100 parts by weight of the mixed resin; and (D) about 1 to about 20 parts by weight of an impact-reinforcing agent based on about 100 parts by weight of the mixed resin.
    Type: Application
    Filed: November 18, 2009
    Publication date: June 24, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Jin-Kyung CHO, Hyung-Tak LEE, Doo-Han HA, Chang-Do JUNG
  • Publication number: 20100160559
    Abstract: Disclosed is a polylactic acid/polycarbonate resin composition including (A) a mixed resin including (a1) a polycarbonate resin and (a2) a polylactic acid resin, and (B) a modified acrylic-based resin, and a molded product made using the same.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 24, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Hyung-Tak Lee, Doo-Han Ha, Chang-Do Jung, Young-Chul Kwon, Jin-Kyung Cho, Young-Mi Chung, Byung-Choon Lee
  • Publication number: 20100152362
    Abstract: A block or graft copolymer including a thermoplastic resin segment and as an aliphatic polyester segment is provided. The copolymer can be used as a compatibilizer for a resin alloy comprising polylactic acid, which can reduce the consumption of petroleum raw materials.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 17, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Ji Won PACK, Byeong Do LEE, Chang Do JUNG, Hyung Tak LEE
  • Publication number: 20100144932
    Abstract: Disclosed is a natural fiber reinforced polylactic acid resin composition that includes (A) a mixed resin including (A-1) a polylactic acid resin and (A-2) a natural fiber, (B) a coupling agent, and (C) carbon nanotubes.
    Type: Application
    Filed: December 9, 2009
    Publication date: June 10, 2010
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Young-Chul KWON, Chang-Do JUNG, Hyung-Tak LEE, Young-Kyu CHANG
  • Publication number: 20100056700
    Abstract: An environmentally-friendly polylactic acid resin composition includes (A) a mixed resin including (a1) a polylactic acid (PLA) resin and (a2) a polycarbonate resin, and (B) a compatibilizer capable of forming a stereo-complex with the polylactic acid resin. According to the present invention, the polylactic acid resin composition is environmentally-friendly and has excellent appearance and improved welding impact strength, as well as improved mechanical strength and heat resistance. Accordingly, it can be used for manufacturing various molded products requiring heat resistance and mechanical strength, for example electronic parts, office machines, miscellaneous goods, and the like.
    Type: Application
    Filed: May 1, 2009
    Publication date: March 4, 2010
    Applicant: Cheil Industries Inc.
    Inventors: Young-Mi Chung, Chang-Do Jung, Young-Jun Lee, Ji-Won Pack, Young-Chul Kwon, Hyung-Tak Lee, Jin-Kyung Cho