Patents by Inventor Jong-Kuk Choi
Jong-Kuk Choi 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: 10329423Abstract: The present invention relates to a modified poly(arylene ether) resin composition. More particularly, the present invention relates to a modified poly(arylene ether) resin composition including 10 to 40% by weight of a poly(arylene ether) resin, 30 to 70% by weight of a polyamide resin, 1 to 20% by weight of a polyolefin based resin, 1 to 10% by weight of a compatibilizer, and 1 to 20% by weight of an impact modifier, and a molded article manufactured using the same. The modified poly(arylene ether) resin composition according to the present invention exhibits reduction of property change due to moisture and provides low specific gravity and superior impact strength, heat resistance, and property balance.Type: GrantFiled: February 12, 2016Date of Patent: June 25, 2019Assignee: LG CHEM, LTD.Inventors: Nam Jib Park, Sang Ho Lee, Se Yeong Ju, Soo Min Lee, Jong Kuk Choi, Sung Ho Lee
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Publication number: 20180161239Abstract: An apparatus for assisting chest compressions includes a main unit that generates information relevant to chest compressions, and a connecting part which is extended from the main unit and of which both ends are connected to each other in order for the apparatus to be wearable on a part of a user's body, and the main unit includes a sensor unit configured to measure a compression depth during the chest compressions and measure a compression direction during the chest compressions, an information generating unit configured to generate information on the basis of a result of the measurement, and a light source operating unit configured to operate a light source on the basis of the information.Type: ApplicationFiled: June 10, 2016Publication date: June 14, 2018Inventors: Jong Kuk CHOI, Seung Mun HAM, Ji Hyo WANG, Dong Joon LEE
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Patent number: 9944792Abstract: A modified poly(arylene ether) resin composition includes a mixed resin that includes a poly(arylene ether) resin, a styrene-based resin and a polyolefin resin; a flame retardant; and mineral oil. A weight-average molecular weight of the mineral oil is 460 to 1,000 g/mol. A wire is manufactured using the modified poly(arylene ether) resin composition.Type: GrantFiled: February 27, 2015Date of Patent: April 17, 2018Assignee: LG CHEM, LTD.Inventors: Sung Hwan Lim, Jong Kuk Choi, Sang Ho Lee, Nam Jib Park, Soo Min Lee, Sung Ho Lee
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Patent number: 9890282Abstract: Disclosed are a flame retardant thermoplastic resin composition suitable for preparing an electric wire, etc. by enhancing extrudability of a resin composition without hindering flame retardancy of the resin composition, and an electric wire comprising the same. The flame retardant thermoplastic resin composition comprises a matrix resin that comprises 20% to 40% by weight of a poly arylene ether resin, 20% to 40% by weight of a vinyl aromatic resin and 5% to 17% by weight of a polypropylene resin comprising a rubber ingredient, and 10% to 30% by weight of a flame retardant, based on a total weight of the resin composition.Type: GrantFiled: February 25, 2015Date of Patent: February 13, 2018Assignee: LG CHEM, LTD.Inventors: Sung Hwan Lim, Soo Min Lee, Jong Kuk Choi, Sung Ho Lee, Eung Soo Kim, Sang Ho Lee, Nam Jib Park
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Patent number: 9822252Abstract: Disclosed are a fire retardant thermoplastic resin composition suitable for preparing an electric wire, etc. by enhancing extrudability of a resin composition without hindering fire retardancy of the resin composition, and an electric wire comprising the same. The fire retardant thermoplastic resin composition comprises a matrix resin that comprises 20 to 35% by weight of a poly arylene ether resin, 20 to 35% by weight of a vinyl aromatic resin and 5 to 20% by weight of an olefin-based resin comprising a rubber ingredient, 1 to 10% by weight of a room-temperature liquid-type fire retardant, and 8 to 20% by weight of an ancillary fire retardant, based on 100% by weight of a mixture of a poly arylene ether resin, a vinyl aromatic resin, an olefin-based resin, a room-temperature liquid-type fire retardant and an ancillary fire retardant.Type: GrantFiled: February 27, 2015Date of Patent: November 21, 2017Assignee: LG Chem, Ltd.Inventors: Sung Hwan Lim, Jong Kuk Choi, Sang Ho Lee, Nam Jib Park, Soo Min Lee, Sung Ho Lee
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Patent number: 9631091Abstract: Disclosed are a flame retardant poly(arylene ether) resin composition and a flame retardant non-crosslinked cable. According to the present invention, provided are a flame retardant poly(arylene ether) resin composition to provide flexibility, flame retardancy, productivity, extrusion processability, etc. while maintaining heat resistance, and a flame retardant non-crosslinked cable manufactured using the composition.Type: GrantFiled: December 10, 2014Date of Patent: April 25, 2017Assignee: LG Chem, Ltd.Inventors: Sung Hwan Lim, Nam Jib Park, Sang Ho Lee, Soo Min Lee, Jong Kuk Choi, Sang Wook Na
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Publication number: 20160362551Abstract: A modified poly(arylene ether) resin composition includes a mixed resin that includes a poly(arylene ether) resin, a styrene-based resin and a polyolefin resin; a flame retardant; and mineral oil. A weight-average molecular weight of the mineral oil is 460 to 1,000 g/mol. A wire is manufactured using the modified poly(arylene ether) resin composition.Type: ApplicationFiled: February 27, 2015Publication date: December 15, 2016Inventors: Sung Hwan LIM, Jong Kuk CHOI, Sang Ho LEE, Nam Jib PARK, Soo Min LEE, Sung Ho LEE
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Patent number: 9493649Abstract: A polycarbonate resin composition including 35 to 49% by weight of a polycarbonate resin; 41 to 55% by weight of a glass fiber having a rectangular or oval cross-sectional shape in the direction perpendicular to the longitudinal direction, in which its aspect ratio is 50 to 200; 1 to 10% by weight of an impact modifier having a core-shell structure; 1 to 10% by weight of an ethylene-(meth)acrylate-based copolymer; and 1 to 10% by weight of a rheology modifier containing a thermoplastic polyester-based polymer or a phosphate ester-based compound.Type: GrantFiled: October 4, 2013Date of Patent: November 15, 2016Assignee: LG Chem, Ltd.Inventors: Ryul Lee, Su Kyoung Lee, Min Ji Kim, Jong Kuk Choi, Sung Tae Ahn
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Publication number: 20160251514Abstract: Disclosed are a flame retardant thermoplastic resin composition suitable for preparing an electric wire, etc. by enhancing extrudability of a resin composition without hindering flame retardancy of the resin composition, and an electric wire comprising the same. The flame retardant thermoplastic resin composition comprises a matrix resin that comprises 20% to 40% by weight of a poly arylene ether resin, 20% to 40% by weight of a vinyl aromatic resin and 5% to 17% by weight of a polypropylene resin comprising a rubber ingredient, and 10% to 30% by weight of a flame retardant, based on a total weight of the resin composition.Type: ApplicationFiled: February 25, 2015Publication date: September 1, 2016Inventors: Sung Hwan LIM, Soo Min LEE, Jong Kuk CHOI, Sung Ho LEE, Eung Soo KIM, Sang Ho LEE, Nam Jib PARK
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Publication number: 20160024303Abstract: Disclosed are a fire retardant thermoplastic resin composition suitable for preparing an electric wire, etc. by enhancing extrudability of a resin composition without hindering fire retardancy of the resin composition, and an electric wire comprising the same. The fire retardant thermoplastic resin composition comprises a matrix resin that comprises 20 to 35% by weight of a poly arylene ether resin, 20 to 35% by weight of a vinyl aromatic resin and 5 to 20% by weight of an olefin-based resin comprising a rubber ingredient, 1 to 10% by weight of a room-temperature liquid-type fire retardant, and 8 to 20% by weight of an ancillary fire retardant, based on 100% by weight of a mixture of a poly arylene ether resin, a vinyl aromatic resin, an olefin-based resin, a room-temperature liquid-type fire retardant and an ancillary fire retardant.Type: ApplicationFiled: February 27, 2015Publication date: January 28, 2016Inventors: Sung Hwan LIM, Jong Kuk CHOI, Sang Ho LEE, Nam Jib PARK, Soo Min LEE, Sung Ho LEE
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Publication number: 20160017146Abstract: Disclosed are a flame retardant poly(arylene ether) resin composition and a flame retardant non-crosslinked cable. According to the present invention, provided are a flame retardant poly(arylene ether) resin composition to provide flexibility, flame retardancy, productivity, extrusion processability, etc. while maintaining heat resistance, and a flame retardant non-crosslinked cable manufactured using the composition.Type: ApplicationFiled: December 10, 2014Publication date: January 21, 2016Inventors: Sung Hwan LIM, Nam Jib PARK, Sang Ho LEE, Soo Min LEE, Jong Kuk CHOI, Sang Wook NA
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Publication number: 20150218371Abstract: The present invention relates to a polycarbonate resin composition which has low warpage property and excellent flowability and appearance properties, and exhibits more improved toughness. The polycarbonate resin composition includes 35 to 60% by weight of a polycarbonate resin; 30 to 55% by weight of a glass fiber having a square or oval cross-sectional shape in the direction perpendicular to the longitudinal direction, in which its aspect ratio of the following Formula 1 is 50 to 200; 1 to 10% by weight of an impact modifier having a core-shell structure; 1 to 10% by weight of an ethylene-(meth)acrylate-based copolymer; and 1 to 10% by weight of a rheology modifier containing a thermoplastic polyester-based polymer or a phosphate ester-based compound.Type: ApplicationFiled: October 4, 2013Publication date: August 6, 2015Applicant: LG CHEM, LTDInventors: Ryul Lee, Su Kyoung Lee, Min Ji Kim, Jong Kuk Choi, Sung Tae Ahn
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Publication number: 20150159013Abstract: A thermoplastic polycarbonate resin composition may include about 50 to about 70 wt % of a polycarbonate resin; about 5 to about 20 wt % of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer; about 10 to about 30 wt % of a polyester resin; about 3 to about 15 wt % of a maleimide-based copolymer; about 2 to about 10 wt % of an impact modifier; and about 0.1 to about 1.0 wt % of a nucleating agent, wherein the polycarbonate resin has a melt index of about 2 to about 20 g/10 min (300° C., 2.16 kg). The thermoplastic polycarbonate resin composition has excellent chemical resistance and mechanical properties.Type: ApplicationFiled: July 2, 2014Publication date: June 11, 2015Inventors: Jae Joon Chang, Hyeon Don Kim, Yong Chun, Myeung Il Kim, Jong Kuk Choi, Yong Kim, Sung Ho Lee, Dae Yong Ok
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Patent number: 9045633Abstract: A thermoplastic polycarbonate resin composition may include about 50 to about 70 wt % of a polycarbonate resin; about 5 to about 20 wt % of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer; about 10 to about 30 wt % of a polyester resin; about 3 to about 15 wt % of a maleimide-based copolymer; about 2 to about 10 wt % of an impact modifier; and about 0.1 to about 1.0 wt % of a nucleating agent, wherein the polycarbonate resin has a melt index of about 2 to about 20 g/10 min (300° C., 2.16 kg). The thermoplastic polycarbonate resin composition has excellent chemical resistance and mechanical properties.Type: GrantFiled: July 2, 2014Date of Patent: June 2, 2015Assignees: Hyundai Mobis Co., Ltd., LG Chem. Ltd.Inventors: Jae Joon Chang, Hyeon Don Kim, Yong Chun, Myeung Il Kim, Jong Kuk Choi, Yong Kim, Sung Ho Lee, Dae Yong Ok
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Patent number: 8829086Abstract: Disclosed is a glass fiber-reinforced polycarbonate flame-retardant resin composition which comprises (A) 50 to 75% by weight of polycarbonate having a melt index of 22 g/10 min or more (300° C., 1.2 kg), (B) 3 to 15% by weight of a rubber-modified styrene-based graft copolymer, (C) 3 to 10% by weight of a bulk copolymer of an aromatic vinyl compound and a vinyl cyan compound, (D) 1 to 10% by weight of an ethylene acrylate-based copolymer, (E) 10 to 25% by weight of glass fiber, and (F) 5 to 20% by weight of an aromatic phosphate ester-based compound, and thus advantageously exhibits superior flowability, flame retardancy, hardness, impact resistance and appearance qualities.Type: GrantFiled: November 6, 2013Date of Patent: September 9, 2014Assignee: LG Chem, Ltd.Inventors: Jong Kuk Choi, Yong Kim, Myeung Il Kim, Dae Young Ok, Sung Tae Ahn
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Publication number: 20140114001Abstract: Disclosed is a glass fiber-reinforced polycarbonate flame-retardant resin composition which comprises (A) 50 to 75% by weight of polycarbonate having a melt index of 22 g/10 min or more (300° C., 1.2 kg), (B) 3 to 15% by weight of a rubber-modified styrene-based graft copolymer, (C) 3 to 10% by weight of a bulk copolymer of an aromatic vinyl compound and a vinyl cyan compound, (D) 1 to 10% by weight of an ethylene acrylate-based copolymer, (E) 10 to 25% by weight of glass fiber, and (F) 5 to 20% by weight of an aromatic phosphate ester-based compound, and thus advantageously exhibits superior flowability, flame retardancy, hardness, impact resistance and appearance qualities.Type: ApplicationFiled: November 6, 2013Publication date: April 24, 2014Applicant: LG CHEM, LTD.Inventors: Jong Kuk CHOI, Yong KIM, Myeung Il KIM, Dae Yong OK, Sung Tae AHN
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Patent number: 7981953Abstract: The present invention relates to a flame retardant rubber-modified styrene resin composition having excellent flame resistance for dripping without containing halogens and phenylene ether, which comprises A) 100 weight part of a rubber-modified polystyrene; B) 1˜10 weight part of a phosphoric ester compound; and C) 0.1˜10 weight part of an aliphatic amide compound. The flame retardant rubber-modified styrene resin composition of the present invention has flame resistance at the level of UL-94 V-2 and excellent impact resistance, heat resistance and fluidity.Type: GrantFiled: December 7, 2006Date of Patent: July 19, 2011Assignee: LG Chem, Ltd.Inventors: Jong-kuk Choi, Dae-san Jung, Sung-ho Lee, Yong-yeon Hwang, Boo-ho Seo
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Publication number: 20080004378Abstract: The present invention relates to a flame retardant rubber-modified styrene resin composition having excellent flame resistance for dripping without containing halogens and phenylene ether, which comprises A) 100 weight part of a rubber-modified polystyrene; B) 1˜10 weight part of a phosphoric ester compound; and C) 0.1˜10 weight part of an aliphatic amide compound. The flame retardant rubber-modified styrene resin composition of the present invention has flame resistance at the level of UL-94 V-2 and excellent impact resistance, heat resistance and fluidity.Type: ApplicationFiled: December 7, 2006Publication date: January 3, 2008Applicant: LG CHEM, LTD.Inventors: Jong-kuk CHOI, Dae-san JUNG, Sung-ho LEE, Yong-yeon HWANG, Boo-ho SEO
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Patent number: 6946516Abstract: A rubber-modified flame resistant styrene resin composition, which has superior heat stability and weather resistance to prevent discoloration and deterioration due to heat or light and is processed under various molding condition, is provided. The rubber-modified flame resistant styrene resin composition includes a rubber-modified styrene resin, flame retardant comprising compounds selected from a group consisting of tetrabromobisphenol-A-bis(2,3-dibromopropylether), hexabromocyclododecane and a mixture thereof, and brominated epoxy oligomer, and calcium stearate as a lubricant.Type: GrantFiled: July 7, 2003Date of Patent: September 20, 2005Assignee: LG Chem, Ltd.Inventors: Dae-San Jung, Yong-Yeon Hwang, Su-Yeon Na, Jong-Kuk Choi, Chan-Hong Lee
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Publication number: 20050020737Abstract: A rubber-modified flame resistant styrene resin composition, which has superior heat stability and weather resistance to prevent discoloration and deterioration due to heat or light and is processed under various molding condition, is provided. The rubber-modified flame resistant styrene resin composition includes a rubber-modified styrene resin, flame retardant comprising compounds selected from a group consisting of tetrabromobisphenol-A-bis(2,3-dibromopropylether), hexabromocyclododecane and a mixture thereof, and brominated epoxy oligomer, and calcium stearate as a lubricant.Type: ApplicationFiled: July 7, 2003Publication date: January 27, 2005Inventors: Dae-San Jung, Yong-Yeon Hwang, Su-Yeon Na, Jong-Kuk Choi, Chan-Hong Lee