Patents by Inventor Rae Keun GWAK
Rae Keun GWAK 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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Publication number: 20240026046Abstract: The present invention relates to an olefin-based polymer, particularly, to a low-density olefin-based polymer introducing a highly crystalline region and showing high mechanical rigidity.Type: ApplicationFiled: March 23, 2022Publication date: January 25, 2024Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, Ji Yoon Woo, In Sung Park, Choong Hoon Lee, Ki Eun Kim, Rae Keun Gwak
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Patent number: 11732071Abstract: An olefin-based copolymer and method of making the same are disclosed herein. In some embodiments, the olefin-based copolymer includes a repeating unit derived from an alpha-olefin, wherein the alphas-olefin is present in the copolymer at 15 wt % to 45 wt %, wherein the copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, and a hardness defined by Equation 1. The olefin-based copolymer has improved hardness and is highly flowable, and may show improved physical properties of tensile strength, elongation rate and flexural modulus.Type: GrantFiled: May 3, 2019Date of Patent: August 22, 2023Inventors: Sang Eun Park, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Patent number: 11718693Abstract: The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, having minimized number of unsaturated functional groups, and having uniform crystallinity, thereby showing excellent physical properties, and a method for preparing the same.Type: GrantFiled: May 3, 2019Date of Patent: August 8, 2023Inventors: Rae Keun Gwak, Seung Hwan Jung, Jin Sam Gong, Jung Ho Jun, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Patent number: 11718738Abstract: The present invention provides an adhesive composition including an ethylene/alpha-olefin copolymer; and a tackifier, wherein the ethylene/alpha-olefin copolymer has narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, and particularly a small amount of vinylidene among the unsaturated functional groups, thereby showing excellent physical properties.Type: GrantFiled: May 3, 2019Date of Patent: August 8, 2023Inventors: Jung Ho Jun, Eun Jung Lee, Jin Sam Gong, Rae Keun Gwak, Tae Su Kim
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Patent number: 11718737Abstract: The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, and particularly a small amount of vinylidene among the unsaturated functional groups to show excellent physical properties, and a method for preparing the same.Type: GrantFiled: May 3, 2019Date of Patent: August 8, 2023Inventors: Jung Ho Jun, Seung Hwan Jung, Jin Sam Gong, Rae Keun Gwak, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Patent number: 11629208Abstract: An olefin-based copolymer and a method of making the same are disclosed herein. In some embodiments, an olefin-based copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, a number of unsaturated functional groups (total V) per 1,000 carbon atoms of 0.8 or less, a vinylene content, and a vinyl content, wherein the vinylene content, the vinyl content and the total V satisfy (a) vinylene content/total V=0.1 to 0.7 and (b) vinylene content/vinyl content=0.8 to 1.6. The olefin-based copolymer has controlled content and kind of an unsaturated functional group in the olefin-based copolymer and thus, has high flowability, and may show improved physical properties of hardness, flexural strength and tensile strength.Type: GrantFiled: May 3, 2019Date of Patent: April 18, 2023Inventors: In Sung Park, Eun Jung Lee, Hyun Jin Ju, Sang Eun Park, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Patent number: 11505725Abstract: The present invention provides an adhesive composition including an ethylene/alpha-olefin copolymer; and a tackifier, wherein the ethylene/alpha-olefin copolymer has narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, uniform crystallinity, thereby showing excellent physical properties.Type: GrantFiled: May 3, 2019Date of Patent: November 22, 2022Inventors: Rae Keun Gwak, Eun Jung Lee, Jin Sam Gong, Jung Ho Jun, Tae Su Kim
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Patent number: 11505631Abstract: The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, and minimized number of unsaturated functional groups, and in which a comonomer is uniformly present to show excellent physical properties, and a method for preparing the same.Type: GrantFiled: May 3, 2019Date of Patent: November 22, 2022Inventors: Jin Sam Gong, Seung Hwan Jung, Jung Ho Jun, Rae Keun Gwak, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Publication number: 20220325018Abstract: The present invention relates to an olefin-based polymer satisfying conditions as follow: (1) a melt index (MI, 190° C., 2.16 kg load conditions) is from 0.1 g/10 min to 10.0 g/10 min, (2) a density (d) is from 0.860 g/cc to 0.880 g/cc, and (3) T(90)?T(50)?50 and T(95)?T(90)?10 are satisfied when measured by a differential scanning calorimetry precise measurement method (SSA). The olefin-based polymer according to the present invention is a low-density olefin-based polymer introducing a highly crystalline region and showing high mechanical rigidity.Type: ApplicationFiled: September 28, 2020Publication date: October 13, 2022Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, Eun Jung Lee, In Sung Park, Tae Su Kim, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20220315747Abstract: The present invention relates to a polypropylene-based composite, including (A) polypropylene, and (B) an olefin-based polymer satisfying the following conditions: (1) a melt index (MI, 190° C., 2.16 kg load conditions) is from 0.1 g/10 min to 10.0 g/10 min, (2) a melting temperature when measured by differential scanning calorimetry (DSC) is from 20° C. to 70° C., and (3) a high temperature melting peak is confirmed at 75° C. to 150° C. when measured by a differential scanning calorimetry precise measurement method (SSA), and a total enthalpy of fusion ?H(75) of a corresponding region is 1.0 J/g or more. The polypropylene-based composite of the present invention may show excellent impact strength.Type: ApplicationFiled: September 28, 2020Publication date: October 6, 2022Applicant: LG Chem, Ltd.Inventors: In Sung Park, Eun Jung Lee, Sang Eun Park, Tae Su Kim, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20220306780Abstract: An olefin-based polymer satisfying conditions as follow: (1) a melt index (MI, 190° C., 2.16 kg load conditions) is from 0.1 g/10 min to 10.0 g/10 min, (2) a melting temperature when measured by differential scanning calorimetry (DSC) is 20° C. to 70° C., and (3) a high temperature melting peak is confirmed at 75° C. to 150° C. when measured by a differential scanning calorimetry precise measurement method (SSA), and a total enthalpy of fusion ?H(75) of a corresponding region is 1.0 J/g or more. The olefin-based polymer according to the present invention is a low-density olefin-based polymer introducing a highly crystalline region and showing high mechanical rigidity.Type: ApplicationFiled: September 28, 2020Publication date: September 29, 2022Applicant: LG Chem, Ltd.Inventors: Tae Su Kim, In Sung Park, Sang Eun Park, Eun Jung Lee, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20220227981Abstract: The present invention relates to a polypropylene-based composite, including (A) polypropylene, and (B) an olefin-based polymer satisfying the following conditions: (1) a melt index (MI, 190° C., 2.16 kg load conditions) is from 0.1 g/10 min to 10.0 g/10 min, (2) a density (d) is from 0.860 g/cc to 0.880 g/cc, and (3) T(90)-T(50)?50 and T(95)-T(90)?10 are satisfied, wherein T(50), T(90) and T(95) are temperatures at which 50%, 90%, and 95% are melted, respectively, when fractionating a temperature-heat capacity curve from measurement results by the differential scanning calorimetry precise measurement method (SSA). The polypropylene-based composite of the present invention may show excellent impact strength.Type: ApplicationFiled: September 28, 2020Publication date: July 21, 2022Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, Eun Jung Lee, In Sung Park, Tae Su Kim, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20220185920Abstract: The present invention relates to a polypropylene-based composite material having improved physical properties including impact strength at low temperature and at room temperature, flexural strength, flexural modulus, etc., and a method for preparing the same.Type: ApplicationFiled: August 27, 2020Publication date: June 16, 2022Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, In Sung Park, Eun Jung Lee, Hyun Jin Ju, Tae Su Kim, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20220049030Abstract: An olefin-based polymer and method of making the same is disclosed herein. In some embodiments, the olefin-based polymer has multiple crystallinity and satisfies the following: (1) two or more peaks in a temperature range of ?20° C. to 120° C. when measured by cross-fractionation chromatography (CFC), and T(90)?T(50)<8.0° C., (2) a soluble fraction (SF) of 1 wt % or less at ?20° C. in CFC, (3) 15° C.<elution temperature (Te)<50° C., and Te has a linear correlation with a density (d) of the polymer, and satisfies the following Equation 1, Te=1,220×d?A, wherein 1,031?A?1,039. The olefin-based polymer according to the present invention is an olefin-based polymer having relatively increased the ratio of high crystal regions, and exhibits excellent mechanical properties such as improved tensile strength, tear strength, and flexural modulus.Type: ApplicationFiled: February 20, 2020Publication date: February 17, 2022Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak, Choong Hoon Lee, Tae Su Kim
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Publication number: 20220049033Abstract: The present invention relates to an olefin-based copolymer of which soluble fraction at a low temperature has a high weight average molecular weight, and which has high flowability and improved physical properties of hardness, flexural strength, tearing strength, etc., and a method for preparing the same.Type: ApplicationFiled: November 15, 2019Publication date: February 17, 2022Applicant: LG Chem, Ltd.Inventors: In Sung Park, Sang Eun Park, Eun Jung Lee, Hyun Jin Ju, Tae Su Kim, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20210230326Abstract: An olefin-based copolymer and method of making the same are disclosed herein. In some embodiments, the olefin-based copolymer includes a repeating unit derived from an alpha-olefin, wherein the alphas-olefin is present in the copolymer at 15 wt % to 45 wt %, wherein the copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, and a hardness defined by Equation 1. The olefin-based copolymer has improved hardness and is highly flowable, and may show improved physical properties of tensile strength, elongation rate and flexural modulus.Type: ApplicationFiled: May 3, 2019Publication date: July 29, 2021Applicant: LG Chem, Ltd.Inventors: Sang Eun Park, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak
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Publication number: 20210230460Abstract: The present invention provides an adhesive composition including an ethylene/alpha-olefin copolymer; and a tackifier, wherein the ethylene/alpha-olefin copolymer has narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, and particularly a small amount of vinylidene among the unsaturated functional groups, thereby showing excellent physical properties.Type: ApplicationFiled: May 3, 2019Publication date: July 29, 2021Applicant: LG Chem, Ltd.Inventors: Jung Ho Jun, Eun Jung Lee, Jin Sam Gong, Rae Keun Gwak, Tae Su Kim
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Publication number: 20210163643Abstract: The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, and minimized number of unsaturated functional groups, and in which a comonomer is uniformly present to show excellent physical properties, and a method for preparing the same.Type: ApplicationFiled: May 3, 2019Publication date: June 3, 2021Applicant: LG Chem, Ltd.Inventors: Jin Sam Gong, Seung Hwan Jung, Jung Ho Jun, Rae Keun Gwak, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Publication number: 20210155727Abstract: The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, having minimized number of unsaturated functional groups, and having uniform crystallinity, thereby showing excellent physical properties, and a method for preparing the same.Type: ApplicationFiled: May 3, 2019Publication date: May 27, 2021Applicant: LG Chem, Ltd.Inventors: Rae Keun Gwak, Seung Hwan Jung, Jin Sam Gong, Jung Ho Jun, Choong Hoon Lee, Eun Jung Lee, Hyun Jin Ju, In Sung Park, Sang Eun Park
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Publication number: 20210095062Abstract: An olefin-based copolymer and a method of making the same are disclosed herein. In some embodiments, an olefin-based copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, a number of unsaturated functional groups (total V) per 1,000 carbon atoms of 0.8 or less, a vinylene content, and a vinyl content, wherein the vinylene content, the vinyl content and the total V satisfy (a) vinylene content/total V=0.1 to 0.7 and (b) vinylene content/vinyl content=0.8 to 1.6. The olefin-based copolymer has controlled content and kind of an unsaturated functional group in the olefin-based copolymer and thus, has high flowability, and may show improved physical properties of hardness, flexural strength and tensile strength.Type: ApplicationFiled: May 3, 2019Publication date: April 1, 2021Applicant: LG Chem, Ltd.Inventors: In Sung Park, Eun Jung Lee, Hyun Jin Ju, Sang Eun Park, Choong Hoon Lee, Jin Sam Gong, Jung Ho Jun, Rae Keun Gwak