Patents by Inventor Byoung Tak Yim
Byoung Tak Yim 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: 20250154294Abstract: A method of preparing an EPDM copolymer by solution polymerization using a Ziegler-Natta catalyst system, in which the Ziegler-Natta catalyst system includes VOCl3, ethylaluminum sesquichloride (EASC), and a straight chain or branched chain C4-C6 alkyl amine as a catalyst modifier. The method includes performing polymerization by adding the catalyst modifier before injecting VOCl3 or by adding VOCl3 and the catalyst modifier simultaneously.Type: ApplicationFiled: May 3, 2024Publication date: May 15, 2025Inventors: Byoung Tak YIM, Jeong Hwan KIM
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Patent number: 12065524Abstract: Provided are an ethylene-propylene-diene monomer (EPDM) copolymer and a method of preparing the same. An EPDM copolymer which has more improved miscibility with inorganic fillers such as carbon black, may further facilitate dispersibility in mixing to further decrease the viscosity of a compound composition, and may provide a compound composition having excellent processability and mechanical properties. A method of preparing the same is also provided.Type: GrantFiled: May 26, 2022Date of Patent: August 20, 2024Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., LtdInventors: Byoung Tak Yim, Byung Jun Kim, Jeong Hwan Kim
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Publication number: 20220389140Abstract: Provided are an ethylene-propylene-diene monomer (EPDM) copolymer and a method of preparing the same. An EPDM copolymer which has more improved miscibility with inorganic fillers such as carbon black, may further facilitate dispersibility in mixing to further decrease the viscosity of a compound composition, and may provide a compound composition having excellent processability and mechanical properties. A method of preparing the same is also provided.Type: ApplicationFiled: May 26, 2022Publication date: December 8, 2022Inventors: Byoung Tak Yim, Byung Jun Kim, Jeong Hwan Kim
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Patent number: 10130931Abstract: Disclosed are a granular super absorbent polymer, including particles (A) having an average diameter of 150 to 850 ?m, wherein the particles (A) includes particles (a1) having an average diameter of 500 to 850 ?m; and particles (a2) having an average diameter of 150 to 250 ?m, and the particles (a1 and a2) have a water-solubility index of 0.08 to 2.0 (represented by Equation 1), thereby it is possible to maintain a proper amount of extractables in a resin, and to exhibit excellent flow conductivity and water absorption ability in a case of being actually applied to products, without inducing any skin problem when, as well as a preparation method thereof.Type: GrantFiled: February 1, 2016Date of Patent: November 20, 2018Assignees: SK INNOVATION CO., LTD., SK GLOBAL CHEMICAL CO., LTD.Inventors: Byoung-Cheon Jo, Du-Youn Ka, Ju-Hee Kim, Byoung-Tak Yim
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Patent number: 9879122Abstract: A super-absorbent polymer satisfying Equation 1 exhibits remarkably improved shape rupture under pressure while maintaining excellent absorption ability. The super-absorbent polymer may be prepared by preparing a base resin by polymerizing a polymeric compound containing an acrylic monomer by using a polyfunctional nitroxide mediated radical polymerization initiator, substituting a terminal of the polymer prepared in the polymerization step with maleic anhydride, cross-linking each maleic anhydride terminal of different polymers prepared in the substitution step by using alkylenediamine having 2 to 8 carbon atoms, drying and grinding the base resin, and surface cross-linking the ground base resin.Type: GrantFiled: February 1, 2016Date of Patent: January 30, 2018Assignees: SK INNOVATION CO., LTD., SK GLOBAL CHEMICAL CO., LTD.Inventors: Ju-Hee Kim, Du-Youn Ka, Byoung-Tak Yim, Byoung-Cheon Jo
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Patent number: 9669384Abstract: Disclosed are a water-absorbing resin and a method of preparing the same, wherein absorbency under unload of the water-absorbing resin is 25 g/g or more, the absorbency under load is 20 g/g or more, and an increase in extractables at a high temperature represented by Equation 1 ranges from 1 or more but less than 3, thereby it is possible to solve a problem that gel-blocking of the water-absorbing resin is accelerated at a high temperature, and improve absorption rate and dry efficiency of the water-absorbing resin.Type: GrantFiled: February 1, 2016Date of Patent: June 6, 2017Assignees: SK GLOBAL CHEMICAL CO., LTD., SK INNOVATION CO., LTD.Inventors: Ju-Hee Kim, Du-Youn Ka, Byoung-Tak Yim, Byoung-Cheon Jo
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Publication number: 20160222175Abstract: A super-absorbent polymer satisfying Equation 1 exhibits remarkably improved shape rupture under pressure while maintaining excellent absorption ability. The super-absorbent polymer may be prepared by preparing a base resin by polymerizing a polymeric compound containing an acrylic monomer by using a polyfunctional nitroxide mediated radical polymerization initiator, substituting a terminal of the polymer prepared in the polymerization step with maleic anhydride, cross-linking each maleic anhydride terminal of different polymers prepared in the substitution step by using alkylenediamine having 2 to 8 carbon atoms, drying and grinding the base resin, and surface cross-linking the ground base resin.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Ju-Hee KIM, Du-Youn KA, Byoung-Tak YIM, Byoung-Cheon JO
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Publication number: 20160220724Abstract: An absorbent polymer has an absorbency under pressure (AUL) ranging from 20 to 45 g/g; a phase angle (67 ) of swollen gel ranging from 3 to 30 degrees; and a decrease in phase angle ranging from 3 to 35%. Thereby, the absorbent polymer may have favorable gel elasticity under pressure after swelling, so as to reduce adhesion between swollen particles. Accordingly, even after absorbing the liquid to swell the absorbent polymer, the polymer may maintain excellent flow conductivity, thereby reducing a decrease in absorption ability of the absorbent polymer.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Du-Youn KA, Ju-Hee KIM, Byoung-Tak YIM, Ju-Eun JUNG, Byoung-Cheon JO
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Publication number: 20160220981Abstract: A water-absorbing resin and a method of preparing the same, and more specifically, to a method of preparing the water-absorbing resin includes crosslinking and polymerization of an unsaturated monomer including an acrylic acid monomer in the presence of a first internal crosslinking agent and a second internal crosslinking agent having a lower reactivity than the first internal crosslinking agent, thereby preparing a water-absorbing resin having significantly improved absorbency due to a uniform crosslinking structure and a suitable degree of crosslinking.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Byoung-Tak YIM, Du-Youn KA, Byoung-Cheon JO
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Publication number: 20160220723Abstract: Disclosed are an absorbent polymer and a method of preparing the same. The absorbent polymer may be mixed with a cross-linking additive in order to allow the polymerized hydrogel to have a uniform cross-linkage structure, and thereby enhancing flow conductivity while having excellent absorption ability.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Du-Youn KA, Ju-Hee KIM, Byoung-Tak YIM, Ju-Eun JUNG, Byoung-Cheon JO
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Publication number: 20160220980Abstract: Disclosed are a water-absorbing resin and a method of preparing the same, wherein absorbency under unload of the water-absorbing resin is 25 g/g or more, the absorbency under load is 20 g/g or more, and an increase in extractables at a high temperature represented by Equation 1 ranges from 1 or more but less than 3, thereby it is possible to solve a problem that gel-blocking of the water-absorbing resin is accelerated at a high temperature, and improve absorption rate and dry efficiency of the water-absorbing resin.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Ju-Hee KIM, Du-Youn KA, Byoung-Tak YIM, Byoung-Cheon JO
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Publication number: 20160220983Abstract: Disclosed are a granular super absorbent polymer, including particles (A) having an average diameter of 150 to 850 ?m, wherein the particles (A) includes particles (a1) having an average diameter of 500 to 850 ?m; and particles (a2) having an average diameter of 150 to 250 ?m, and the particles (a1 and a2) have a water-solubility index of 0.08 to 2.0 (represented by Equation 1), thereby it is possible to maintain a proper amount of extractables in a resin, and to exhibit excellent flow conductivity and water absorption ability in a case of being actually applied to products, without inducing any skin problem when, as well as a preparation method thereof.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Inventors: Byoung-Cheon JO, Du-Youn KA, Ju-Hee KIM, Byoung-Tak YIM
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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: 20110152475Abstract: 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: ApplicationFiled: December 14, 2010Publication date: June 23, 2011Applicant: SK ENERGY 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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Patent number: 6998446Abstract: The present invention relates to the unbalanced multi-block styrene-butadiene-styrene (SBS) and provides the copolymer represented by the following structure, mB1*S1?lB2?S2?sB3, wherein B is a butadiene block, S is a styrene block, l, m, s are the relative size among the blocks (i.e., large size, middle size, and small size, respectively), and * is the tapered block between mB1 block and S1 block (i.e., random copolymer of a kind). They have to satisfy the following related expressions. 0.01lB2?mB1?0.5lB2 and 0.01mB1?sB3?0.5mB1 ??a) 0.5S1?S2?1.5S1 ??b) 5%?*%?25% ??c) In the related expression, the value of B1 and S1 include tapered block for the sake of convenience, and * % is the random styrene content in all the styrene in SBS. The unbalanced multi-block SBS of this invention exhibits excellent processability in the preparation of hot-melt adhesives, reducing processing hours.Type: GrantFiled: July 22, 2003Date of Patent: February 14, 2006Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Nam Hoon Baik, Seung Il Kim, Dong Hyuk Na, Sun Woo Cheen, Byoung Tak Yim