Patents by Inventor Myung-Ahn Ok
Myung-Ahn Ok 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: 8747970Abstract: Provided is an eco-friendly poly(propylene carbonate) resin composition for a sheet, which is characterized by using a poly(alkylene carbonate) resin developed by efficiently utilizing carbon dioxide, which is a major contributor to global warding, as a main material, and including appropriate additives, such as, a strength modifier, and a flexibilizer, thereby completely solving environmental hazards controversy of the existing polyvinyl chloride resin products; exhibiting excellent mechanical and thermal properties, processability, post processability (printability, embossing and surface treatment, laminating characteristics) and superior anti-flaming property (low smoke density) and elongation characteristics as compared with the existing polyvinyl chloride resin products; and overcoming an extruding production method which is a small-sized production manner, corresponding to a big defect in thermoplastic plastics emerged as substitutes for polyvinyl chloride resin products and thus applying a calenderingType: GrantFiled: October 24, 2012Date of Patent: June 10, 2014Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.Inventors: Jae Koo Kim, Young Hyo Park, In Hun Son, Seung Gweon Hong, Kang Min Jung, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8742043Abstract: Disclosed herein is a group IV transition metal catalyst for producing an ethylene homopolymer or an ethylene-olefin copolymers, having high catalytic activity, which includes a cyclopentadiene derivative and one or more anionic ligands having an aryl group substituted with an aryl derivative at an ortho-position thereof around a transition metal, the ligands not being crosslinked to each other, a catalyst system including the group IV transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and a method of producing ethylene homopolymers or ethylene-olefin copolymers using the catalyst system.Type: GrantFiled: October 30, 2007Date of Patent: June 3, 2014Assignee: SK Innovation Co., Ltd.Inventors: Myung Ahn Ok, Dae Ho Shin, Jong Sok Hahn, Ho Seong Lee, Sang Ook Kang, Sung Kwan Kim
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Publication number: 20140081064Abstract: Disclosed herein is a method of preparing 1-octene at high activity and high selectivity while stably maintaining reaction activity by tetramerizing ethylene using a chromium-based catalyst system comprising a transition metal or a transition metal precursor, a cocatalyst, and a P—C—C—P backbone structure ligand represented by (R1)(R2)P—(R5)CHCH(R6)—P(R3)(R4).Type: ApplicationFiled: November 21, 2013Publication date: March 20, 2014Applicant: SK INNOVATION CO., LTD. & SK GLOBAL CHEMICAL CO. LTD.Inventors: TAEK KYU HAN, MYUNG AHN OK, SUNG SEOK CHAE, SANG OOK KANG, JAE HO JUNG
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Patent number: 8674026Abstract: Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a process of producing an ethylene copolymer from ethylene and an alpha-olefin comonomer, in which the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, and thus can increase the value and productivity of products, including pipes and films. Particularly, the produced ethylene copolymer has a trimodal or higher molecular weight distribution or density distribution, and thus, when it is a linear low-density copolymer, it has an excellent effect of improving the impact strength of films, and when it is a medium-density ethylene copolymer, it can be produced into pipes, which have slow crack growth rate and can be used even at high temperature.Type: GrantFiled: December 7, 2011Date of Patent: March 18, 2014Assignee: SK Innovation Co., Ltd.Inventors: Choon Sik Shim, Hyeong Taek Ham, Sung Seok Chae, Dae Ho Shin, Seung Bum Kwon, Jong Sok Hahn, Myung Ahn Ok
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Publication number: 20140037965Abstract: The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer.Type: ApplicationFiled: October 4, 2013Publication date: February 6, 2014Applicant: SK Innovation Co., Ltd.Inventors: Min Ho Jeon, Ji Eun Yoo, Moon Jung Choi, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8609924Abstract: Disclosed herein is a method of preparing 1-octene at high activity and high selectivity while stably maintaining reaction activity by tetramerizing ethylene using a chromium-based catalyst system comprising a transition metal or a transition metal precursor, a cocatalyst, and a P—C—C—P backbone structure ligand represented by (R1)(R2)P—(R5)CHCH(R6)—P(R3)(R4).Type: GrantFiled: January 17, 2008Date of Patent: December 17, 2013Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.Inventors: Taek Kyu Han, Myung Ahn Ok, Sung Seok Chae, Sang Ook Kang, Jae Ho Jung
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Patent number: 8598309Abstract: This invention relates to a Salen type ligand including three or more quaternary ammonium salts of nitrate anions, to a trivalent metal complex compound prepared from this ligand and a method of preparing the same, to a method of preparing polycarbonate by copolymerizing an epoxide compound and carbon dioxide using the complex compound as a catalyst, and to a method of separating and collecting the catalyst from the copolymer after copolymerization. This catalyst used to copolymerize an epoxide compound and carbon dioxide can be more simply prepared, and has lower catalyst preparation and recovery costs, and higher activity, compared to conventional catalysts.Type: GrantFiled: February 23, 2011Date of Patent: December 3, 2013Assignee: SK Innovation Co., Ltd.Inventors: Ji Su Jeong, Sujith Sudevan, Myung Ahn Ok, Sung Jae Na, Yong Gyu Han, Kwang Jin Chung, Bun Yeoul Lee, Kodiyan Varghese Jobi
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Patent number: 8568636Abstract: The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer.Type: GrantFiled: August 25, 2011Date of Patent: October 29, 2013Assignee: SK Innovation Co., Ltd.Inventors: Min Ho Jeon, Ji Eun Yoo, Moon Jung Choi, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8436113Abstract: There is provided a method for producing copolymer that is composed of ethylene and alpha-olefin by a solution polymerization, and more specifically, a method for producing copolymer that is composed of ethylene and aromatic monomer as main components by using a transition metal catalyst including a cyclopentadiene derivative, and one or more anionic ligand having aryloxy group in which an aryl derivative is substituted at an ortho-positionType: GrantFiled: December 14, 2010Date of Patent: May 7, 2013Assignees: SK Innovations Co., Ltd., SK Global Chemical Co., Ltd.Inventors: Hwan Kyu Jung, Young Wook Kim, Byoung Tak Yim, Ho Seong Lee, Myung Ahn Ok, Jong Sok Hahn, Dong Cheol Shin
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Publication number: 20130102715Abstract: Provided is an eco-friendly poly(propylene carbonate) resin composition for a sheet, which is characterized by using a poly(alkylene carbonate) resin developed by efficiently utilizing carbon dioxide, which is a major contributor to global warding, as a main material, and including appropriate additives, such as, a strength modifier, and a flexibilizer, thereby completely solving environmental hazards controversy of the existing polyvinyl chloride resin products; exhibiting excellent mechanical and thermal properties, processability, post processability (printability, embossing and surface treatment, laminating characteristics) and superior anti-flaming property (low smoke density) and elongation characteristics as compared with the existing polyvinyl chloride resin products; and overcoming an extruding production method which is a small-sized production manner, corresponding to a big defect in thermoplastic plastics emerged as substitutes for polyvinyl chloride resin products and thus applying a calenderingType: ApplicationFiled: October 24, 2012Publication date: April 25, 2013Inventors: Jae Koo KIM, Young Hyo Park, In Hun Son, Seung Gweon Hong, Kang Min Jung, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8376537Abstract: Provided is an eco-friendly rotogravure hot melt ink composition. More specifically, the present invention provides the rotogravure hot melt ink composition meeting requirements of a carbon footprint system by using, as a vehicle, poly propylene carbonate prepared using carbon dioxide as a raw material. The rotogravure hot melt ink prepared by the composition of the present invention has a higher printing density and more easily performs printing at low temperature than a poly vinyl acetate based hot melt ink according to the related art.Type: GrantFiled: August 19, 2011Date of Patent: February 19, 2013Assignee: SK Innovation Co., Ltd.Inventors: SeungGweon Hong, JaeYoung Park, HyeLim Kim, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8344081Abstract: The present invention relates to a transition metal complex useful as a transition metal catalyst in the preparation of an ethylene homopolymer or a copolymer of ethylene and an ?-olefin, a catalyst composition comprising the same and a process of preparing an ethylene homopolymer or a copolymer of ethylene and an ?-olefin using the same. More particularly, it relates to a transition metal complex having a cyclopentadiene derivative and at least one phenyl oxide ligand substituted at the 2-position of phenyl with, for example, a silyl group having a C1-C30 hydrocarbon group or a C1-C20 hydrocarbon group, around a group IV transition metal, with no crosslinkage between the ligands, a catalyst composition comprising the transition metal complex and a cocatalyst selected from the group consisting of an aluminoxane and a boron compound, and a process for preparing an ethylene homopolymer or a copolymer of ethylene and an ?-olefin using the same.Type: GrantFiled: October 30, 2008Date of Patent: January 1, 2013Assignee: SK Innovation Co., Ltd.Inventors: Jong-Sok Hahn, Myung-Ahn Ok, Dong-Cheol Shin, Ho-Seong Lee, Sang-Ook Kang, Tae-Jin Kim
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Publication number: 20120196958Abstract: Provided is a polyalkylene carbonate resin composition for producing a decorating material and an environment-friendly polyalkylene carbonate resin decorating material produced therefrom, and more particularly to polyalkylene carbonate resin composition for producing a decorating material in which a polymer additive is input to impart heat resistance and shape stability of the decorating material, a crosslinker and a chain extender is input to improve the processability at a processing temperature, and a flame retardant agent is added to impart a flame retardant effect, and an environment-friendly polyalkylene carbonate resin decorating material produced therefrom. An environment-friendly polyalkylene carbonate resin decorating material having excellent thermal stability, processability, and dimensional stability can be produced by using the composition according to the present invention.Type: ApplicationFiled: January 26, 2012Publication date: August 2, 2012Applicant: SK INNOVATION CO., LTD.Inventors: Younghyo Park, Inhun Son, Kangmin Jung, Jaekoo Kim, Kwangjin Chung, Myung Ahn Ok
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Publication number: 20120165479Abstract: Provided is a method for improving thermal stability of polypropylene carbonate and, more particularly, a method of end capping a molecular chain of polypropylene carbonate using a urethane group by adding isocyanates or diisocyanates to a polypropylene carbonate resin, which may optionally be a mixture containing tertiary polyol, so as to delay thermal degradation of the polypropylene carbonate at a high temperature, thereby securing desired thermal stability. Especially, the method capable of being easily applied to reactive extrusion after preparing the polypropylene carbonate has been proposed, thus simplifying production processes and ensuring economical advantages. Moreover, the above method does not deteriorate transparency and specific smoke density characteristics at combustion, which are advantages of the polypropylene carbonate.Type: ApplicationFiled: December 13, 2011Publication date: June 28, 2012Applicant: SK INNOVATION CO., LTD.Inventors: SeungGweon Hong, JaeYoung Park, HyeLim Kim, Kwang Jin Chung, Myung Ahn Ok
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Publication number: 20120157592Abstract: Provided is an eco-friendly rotogravure hot melt ink composition. More specifically, the present invention provides the rotogravure hot melt ink composition meeting requirements of a carbon footprint system by using, as a vehicle, poly propylene carbonate prepared using carbon dioxide as a raw material. The rotogravure hot melt ink prepared by the composition of the present invention has a higher printing density and more easily performs printing at low temperature than a poly vinyl acetate based hot melt ink according to the related art.Type: ApplicationFiled: August 19, 2011Publication date: June 21, 2012Applicant: SK INNOVATION CO., LTD.Inventors: SeungGweon Hong, JaeYoung Park, HyeLim Kim, Kwang Jin Chung, Myung Ahn Ok
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Publication number: 20120141702Abstract: Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a process of producing an ethylene copolymer from ethylene and an alpha-olefin comonomer, in which the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, and thus can increase the value and productivity of products, including pipes and films. Particularly, the produced ethylene copolymer has a trimodal or higher molecular weight distribution or density distribution, and thus, when it is a linear low-density copolymer, it has an excellent effect of improving the impact strength of films, and when it is a medium-density ethylene copolymer, it can be produced into pipes, which have slow crack growth rate and can be used even at high temperature.Type: ApplicationFiled: December 7, 2011Publication date: June 7, 2012Inventors: Choon Sik Shim, Hyeong Taek Ham, Sung Seok Chae, Dae Ho Shin, Seung Bum Kwon, Jong Sok Hahn, Myung Ahn Ok
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Publication number: 20120065360Abstract: Provided is preparation of poly(alkylene carbonate) through alternating copolymerization of carbon dioxide and epoxide. According to the disclosure, by introducing a diepoxide compound to alternating copolymerization of carbon dioxide and epoxide compound using a metal(III) prepared with salen-type ligands containing quaternary ammonium salt as a catalyst, some of the polymer chains may be cross-linked to thus increase an average molecular weight of the copolymer and extend a distribution of molecular weight. A resin prepared according to this method may have high mechanical strength and rheological advantages.Type: ApplicationFiled: September 7, 2011Publication date: March 15, 2012Applicant: SK INNOVATION CO., LTD.Inventors: Ji Su Jeong, Sung Jae Na, Sujith Sudevan, Myung Ahn Ok, Yong Gyu Han, Kwang Jin Chung, Bun Yeoul Lee, Anish Cyriac
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Publication number: 20120058346Abstract: The present invention relates to a multilayer film coextruded from an aliphatic polycarbonate and polylactic acid-based polymer and a method for producing the same. According to the present invention, a multilayer film having excellent adhesive property can be manufactured even without a separate adhesive layer.Type: ApplicationFiled: August 25, 2011Publication date: March 8, 2012Applicant: SK INNOVATION CO., LTD.Inventors: Min Ho Jeon, Ji Eun Yoo, Moon Jung Choi, Kwang Jin Chung, Myung Ahn Ok
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Patent number: 8076428Abstract: Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a process of producing an ethylene copolymer from ethylene and an alpha-olefin comonomer, in which the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, and thus can increase the value and productivity of products, including pipes and films. Particularly, the produced ethylene copolymer has a trimodal or higher molecular weight distribution or density distribution, and thus, when it is a linear low-density copolymer, it has an excellent effect of improving the impact strength of films, and when it is a medium-density ethylene copolymer, it can be produced into pipes, which have slow crack growth rate and can be used even at high temperature.Type: GrantFiled: September 2, 2008Date of Patent: December 13, 2011Assignee: SK Energy Co., Ltd.Inventors: Choon Sik Shim, Hyeong Taek Ham, Sung Seok Chae, Dae Ho Shin, Seung Bum Kwon, Jong Sok Hahn, Myung Ahn Ok
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Publication number: 20110207909Abstract: This invention relates to a Salen type ligand including three or more quaternary ammonium salts of nitrate anions, to a trivalent metal complex compound prepared from this ligand and a method of preparing the same, to a method of preparing polycarbonate by copolymerizing an epoxide compound and carbon dioxide using the complex compound as a catalyst, and to a method of separating and collecting the catalyst from the copolymer after copolymerization. This catalyst used to copolymerize an epoxide compound and carbon dioxide can be more simply prepared, and has lower catalyst preparation and recovery costs, and higher activity, compared to conventional catalysts.Type: ApplicationFiled: February 23, 2011Publication date: August 25, 2011Applicant: SK INNOVATION CO., LTD.Inventors: Ji Su Jeong, Sujith Sudevan, Myung Ahn Ok, Sung Jae Na, Yong Gyu Han, Kwang Jin Chung, Bun Yeoul Lee, Kodiyan Varghese Jobi