Patents by Inventor Sungseok Chae
Sungseok Chae 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: 8729393Abstract: The present invention is an uncrosslinked linear medium-density polyethylene resin composition for a power cable, which is applicable to an insulating layer, a semi-conducting layer or a sheath layer. Specifically, the uncrosslinked polyethylene composition includes: 100 parts by weight of a polymer having a linear medium-density polyethylene resin having an ?-olefin having 4 or more carbon atoms as a comonomer and having a melt index of 0.6-2.2 g/10 min (at 190° C. under a load of 5 kg), a differential scanning calorimetry (DSC) enthalpy of 130-190 joule/g and a molecular weight distribution of 2-30; and 0.1 to 10 parts by weight of one or more additive(s) selected from a flame retardant, an oxidation stabilizer, a UV stabilizer, a heat stabilizer and a process aid.Type: GrantFiled: March 22, 2010Date of Patent: May 20, 2014Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.Inventors: Kyucheol Cho, Moonseok Lee, Hongdae Kim, Sungseok Chae
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Patent number: 8492494Abstract: Provided are ethylene copolymers with excellent impact resistance. More specifically, provided are ethylene copolymers satisfying certain correlation between the falling dart impact strength (F) or high rate impact resistant breakage energy (E) and Vicat softening point. The ethylene copolymers with improved impact properties are applicable to film, injection, compound, sheet, roto, pipe or blow molding.Type: GrantFiled: November 15, 2012Date of Patent: July 23, 2013Assignee: SK Innovation Co., Ltd.Inventors: Seungbum Kwon, Hyeongtaek Ham, Choonsik Shim, Sungseok Chae, Myungahn Ok, Daeho Shin
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Publication number: 20130137837Abstract: Provided are ethylene copolymers with excellent impact resistance. More specifically, provided are ethylene copolymers satisfying certain correlation between the falling dart impact strength (F) or high rate impact resistant breakage energy (E) and Vicat softening point. The ethylene copolymers with improved impact properties are applicable to film, injection, compound, sheet, roto, pipe or blow molding.Type: ApplicationFiled: November 15, 2012Publication date: May 30, 2013Inventors: Seungbum KWON, Hyeongtaek Ham, Choonsik Shim, Sungseok Chae, Myungahn Ok, Daeho Shin
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Patent number: 8334354Abstract: Provided are ethylene copolymers with excellent impact resistance. More specifically, provided are ethylene copolymers satisfying certain correlation between the falling dart impact strength (F) or high rate impact resistant breakage energy (E) and Vicat softening point. The ethylene copolymers with improved impact properties are applicable to film, injection, compound, sheet, roto, pipe or blow molding.Type: GrantFiled: October 29, 2009Date of Patent: December 18, 2012Assignee: SK Innovation Co., Ltd.Inventors: Seungbum Kwon, Hyeongtaek Ham, Choonsik Shim, Sungseok Chae, Myungahn Ok, Daeho Shin
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Publication number: 20120041149Abstract: Provided are ethylene copolymers and a process for preparing the same. More specifically, provided are ethylene copolymers exhibiting excellent processibility and physical properties due to its multimodal molecular weight distribution index, through a multi-stage process by using reactors connected in series or in parallel in the presence of catalyst composition containing transition metal catalyst, and a process for preparing the same.Type: ApplicationFiled: October 27, 2011Publication date: February 16, 2012Applicant: SK Innovation Co., Ltd.Inventors: Daeho SHIN, Choonsik Shim, Jisu Jeong, Sungseok Chae, Myungahn Ok, Seungbum Kwon, Dong-Cheol Shin, Ho-Seong Lee
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Publication number: 20120012363Abstract: Disclosed is uncrosslinked linear medium-density polyethylene resin composition for a power cable, which is applicable to an insulating layer, a semi-conducting layer or a sheath layer. Specifically, the uncrosslinked polyethylene composition includes: 100 parts by weight of a polymer comprising a linear medium-density polyethylene resin comprising an ?-olefin having 4 or more carbon atoms as a comonomer and having a melt index of 0.6-2.2 g/10 min (at 190° C. under a load of 5 kg), a differential scanning calorimetry (DSC) enthalpy of 130-190 joule/g and a molecular weight distribution of 2-30; and 0.1 to 10 parts by weight of one or more additive(s) selected from a flame retardant, an oxidation stabilizer, a UV stabilizer, a heat stabilizer and a process aid.Type: ApplicationFiled: March 22, 2010Publication date: January 19, 2012Applicants: SK GLOBAL CHEMICAL CO., LTD., SK INNOVATION CO., LTD.Inventors: Kyucheol Cho, Moonseok Lee, Hongdae Kim, Sungseok Chae
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Publication number: 20120015123Abstract: Provided is an ethylene copolymer with improved elasticity and processibility. More specifically, provided is an ethylene copolymer which exhibits a high zero shear viscosity and a large degree of shear thinning degree, and shows rheological characteristics behaviors differentiated from products manufactured by using the existing metallocene and Ziegler-Natta catalysts. In addition, provided is an ethylene copolymer which has a low processing load, shows differentiated behavior in Van-Gurp Palmen analysis, and exhibits excellent Neck-in characteristics.Type: ApplicationFiled: July 13, 2011Publication date: January 19, 2012Applicant: SK INNOVATION CO., LTD.Inventors: Seungbum Kwon, Hyeongtaek Ham, Sungseok Chae, Sewon Oh, Hyunwook Jung
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Patent number: 8067511Abstract: Provided are ethylene copolymers and a process for preparing the same. More specifically, provided are ethylene copolymers exhibiting excellent processibility and physical properties due to its multimodal molecular weight distribution index, through a multi-stage process by using reactors connected in series or in parallel in the presence of catalyst composition containing transition metal catalyst, and a process for preparing the same.Type: GrantFiled: September 11, 2009Date of Patent: November 29, 2011Assignee: SK Innovation Co., Ltd.Inventors: Daeho Shin, Choonsik Shim, Jisu Jeong, Sungseok Chae, Myungahn Ok, Seungbum Kwon, Dong-Cheol Shin, Ho-Seong Lee
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Publication number: 20110282011Abstract: Provided is a process for preparing copolymers of ethylene with ?-olefin. More specifically, provided are transition metal compound being useful as catalyst for preparing those copolymers, a catalyst composition comprising the same, and a process for preparing elastic copolymers of ethylene with ?-olefin, having the density of not more than 0.910, which can be adopted to a wide variety of applications including film, electric wires, and hot-melt adhesives. The catalyst composition is a catalytic system which comprises transition metal catalyst comprising a cyclopentadiene derivative and at least one anionic ligand(s) of aryloxy group with an aryl derivative at ortho-position, and boron or aluminum compound as an activator. Provided is a process for copolymerizing ethylene with ?-olefin to produce copolymer having narrow molecular weight distribution and uniform density distribution with the density of not more than 0.910, with high activity and excellent reactivity on higher ?-olefin.Type: ApplicationFiled: July 28, 2011Publication date: November 17, 2011Applicant: SK ENERGY CO., LTD.Inventors: Myungahn Ok, Daeho Shin, Seungbum Kwon, Jongsok Hahn, Hoseong Lee, Choonsik Shim, Hyeongtaek Ham, Jisu Jeong, Sungseok Chae
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Patent number: 8013086Abstract: Provided is a process for preparing copolymers of ethylene with ?-olefin. More specifically, provided are transition metal compound being useful as catalyst for preparing those copolymers, a catalyst composition comprising the same, and a process for preparing elastic copolymers of ethylene with ?-olefin, having the density of not more than 0.910, which can be adopted to a wide variety of applications including film, electric wires, and hot-melt adhesives. The catalyst composition is a catalytic system which comprises transition metal catalyst comprising a cyclopentadiene derivative and at least one anionic ligand(s) of aryloxy group with an aryl derivative at ortho-position, and boron or aluminum compound as an activator. Provided is a process for copolymerizing ethylene with ?-olefin to produce copolymer having narrow molecular weight distribution and uniform density distribution with the density of not more than 0.910, with high activity and excellent reactivity on higher ?-olefin.Type: GrantFiled: November 4, 2009Date of Patent: September 6, 2011Assignee: SK Energy Co., Ltd.Inventors: Myungahn Ok, Daeho Shin, Seungbum Kwon, Jongsok Hahn, Hoseong Lee, Choonsik Shim, Hyeongtaek Ham, Jisu Jeong, Sungseok Chae
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Publication number: 20100120981Abstract: Provided are ethylene copolymers and a process for preparing the same. More specifically, provided are ethylene copolymers exhibiting excellent processibility and physical properties due to its multimodal molecular weight distribution index, through a multi-stage process by using reactors connected in series or in parallel in the presence of catalyst composition containing transition metal catalyst, and a process for preparing the same.Type: ApplicationFiled: September 11, 2009Publication date: May 13, 2010Inventors: Daeho Shin, Choonsik Shim, Jisu Jeong, Sungseok Chae, Myungahn Ok, Seungbum Kwon, Dong-Cheol Shin, Ho-Seong Lee
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Publication number: 20100113720Abstract: Provided is a process for preparing copolymers of ethylene with ?-olefin. More specifically, provided are transition metal compound being useful as catalyst for preparing those copolymers, a catalyst composition comprising the same, and a process for preparing elastic copolymers of ethylene with ?-olefin, having the density of not more than 0.910, which can be adopted to a wide variety of applications including film, electric wires, and hot-melt adhesives. The catalyst composition is a catalytic system which comprises transition metal catalyst comprising a cyclopentadiene derivative and at least one anionic ligand(s) of aryloxy group with an aryl derivative at ortho-position, and boron or aluminum compound as an activator. Provided is a process for copolymerizing ethylene with ?-olefin to produce copolymer having narrow molecular weight distribution and uniform density distribution with the density of not more than 0.910, with high activity and excellent reactivity on higher ?-olefin.Type: ApplicationFiled: November 4, 2009Publication date: May 6, 2010Inventors: Myungahn Ok, Daeho Shin, Seungbum Kwon, Jongsok Hahn, Hoseong Lee, Choonsik Shim, Hyeongtaek Ham, Jisu Jeong, Sungseok Chae
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Publication number: 20100113729Abstract: Provided are ethylene copolymers with excellent impact resistance. More specifically, provided are ethylene copolymers satisfying certain correlation between the falling dart impact strength (F) or high rate impact resistant breakage energy (E) and Vicat softening point. The ethylene copolymers with improved impact properties are applicable to film, injection, compound, sheet, roto, pipe or blow molding.Type: ApplicationFiled: October 29, 2009Publication date: May 6, 2010Inventors: Seungbum Kwon, Hyeongtek Ham, Choonsik Shim, Sungseok Chae, Myungahn Ok, Daeho Shin