Patents by Inventor Byeong-do Lee
Byeong-do Lee 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: 7812072Abstract: A method of preparing a styrene polymer-silica nanocomposite is disclosed. One embodiment of the method includes polymerizing about 100 parts by weight of a monomer mixture including about 50 to about 80% by weight of an aromatic monomer an about 20 to about 50% by weight of a vinyl cyanide monomer with about 0.5 to about 30 parts by weight of a colloidal silica dispersed in a first organic solvent.Type: GrantFiled: May 30, 2008Date of Patent: October 12, 2010Assignee: Cheil Industries, Inc.Inventors: Byeong Do Lee, Young Sub Jin, Hwan Seok Park, Jae Keun Hong, Young Sik Ryu, Il Jin Kim
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Publication number: 20100168333Abstract: The present invention provides a thermoplastic resin composition that can have excellent heat resistance and impact strength comprising a rubber-modified styrene resin and a copolymer of N-substituted maleimide compound and aromatic vinyl compound.Type: ApplicationFiled: December 28, 2009Publication date: July 1, 2010Applicant: CHEIL INDUSTRIES INC.Inventors: Jae Keun HONG, Byeong Do LEE, Ho Ryong SUN, Young Sub JIN, Hwan Seok PARK, Sung Kwan KIM, Sa Chun BAE
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Publication number: 20100168354Abstract: A thermoplastic resin of the present invention is prepared by copolymerizing conjugated diene rubber (A), rubbery aromatic copolymer (B), heat resistant aromatic vinyl compound (C), aromatic vinyl compound (D), unsaturated nitrile compound (E) and cross linking agent (F) and can have excellent heat resistance, impact strength, and low gloss.Type: ApplicationFiled: December 28, 2009Publication date: July 1, 2010Applicant: CHEIL INDUSTRIES INC.Inventors: Jae Keun HONG, Byeong Do LEE, Ho Ryong SUN, Young Sub JIN, Hwan Seok PARK, Sung Kwan KIM, Jae Woo PARK
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Publication number: 20100152362Abstract: A block or graft copolymer including a thermoplastic resin segment and as an aliphatic polyester segment is provided. The copolymer can be used as a compatibilizer for a resin alloy comprising polylactic acid, which can reduce the consumption of petroleum raw materials.Type: ApplicationFiled: December 4, 2009Publication date: June 17, 2010Applicant: CHEIL INDUSTRIES INC.Inventors: Ji Won PACK, Byeong Do LEE, Chang Do JUNG, Hyung Tak LEE
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Publication number: 20100105840Abstract: A weather resistant thermoplastic resin having excellent low gloss characteristics according to the present invention comprises a (meth)acrylic acid alkyl ester-based polymer (A) and an aromatic vinyl-cyanide vinyl based copolymer (B), wherein the (meth)acrylic acid alkyl ester-based polymer (A) forms a network-shaped disperse phase, and the aromatic vinyl-cyanide vinyl based copolymer (B) forms a continuous phase. The thermoplastic resin has excellent low gloss characteristics as well as superior weatherability, impact resistance, thermal resistance, delamination characteristics, and the like.Type: ApplicationFiled: October 26, 2009Publication date: April 29, 2010Applicant: CHEIL INDUSTRIES INC.Inventors: Young Sub Jin, Sung Kwan Kim, Hwan Seok Park, Jae Keun Hong, Byeong Do Lee, Ho Ryong Sun, Bong Sil Jang, Chul In Lim
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Publication number: 20090215960Abstract: A method for preparing a thermoplastic resin is disclosed, which includes consecutively polymerizing a mixed raw material comprising a (meth)acrylic acid alkyl ester, an aromatic vinyl monomer and a unsaturated nitrile monomer in a plurality of serially connected reactors while controlling polymerization conversion in each reactor to be about 40% or less. The invention also relates to a transparent ABS resin composition which employs the thermoplastic resin as a matrix resin.Type: ApplicationFiled: April 30, 2009Publication date: August 27, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Young Sub JIN, Byeong Do LEE, Jae Keun HONG, Hwan Seok PARK
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Publication number: 20090171028Abstract: Disclosed herein is a thermoplastic resin composition having excellent scratch resistance and a method for preparing the same. The thermoplastic resin composition comprises (A) about 80 to about 95% by weight of a terpolymer of (meth)acrylic acid alkyl ester-aromatic vinyl-cyanide vinyl compound; and (B) about 5 to about 20% by weight of a butadiene rubber.Type: ApplicationFiled: December 29, 2008Publication date: July 2, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Young Sub Jin, Hwan Seok Park, Jae Keun Hong, Sung Kwan Kim, Ho Ryong Sun, Byeong Do Lee, Kyung Jong Lee
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Publication number: 20090171020Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.Type: ApplicationFiled: December 29, 2008Publication date: July 2, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Hwan Seok Park, Young Sub Jin, Jae Keun Hong, Sung Kwan Kim, Byeong Do Lee, Ho Ryong Sun, Seung Dae Lee
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Publication number: 20090156719Abstract: One aspect of the invention relates to a transparent ABS resin composition having excellent impact resistance and flowability, which comprises about 10 to about 50 parts by weight of a rubber/(meth)acrylate-aromatic vinyl-unsaturated nitrile graft copolymer; about 50 to about 90 parts by weight of a thermoplastic resin matrix; and about 0.2 to about 0.5 parts by weight of a fluidizer, per 100 parts by weight of a base resin comprising the rubber/(meth)acrylate-aromatic vinyl-unsaturated nitrile graft copolymer and the thermoplastic resin matrix.Type: ApplicationFiled: February 13, 2009Publication date: June 18, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Young Sub JIN, Jae Keun HONG, Hwan Seok PARK, Byeong Do LEE
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Publication number: 20090143532Abstract: One aspect of the invention relates to a transparent rubber-modified styrenic resin composition. The resin composition comprises about 5 to about 30 parts by weight of a styrene-butadiene rubbery copolymer; and about 0 to about 15 parts by weight of a matrix resin comprising about 20 to about 40 parts by weight of styrenic monomer, about 30 to about 60 parts by weight of unsaturated carboxylic acid alkyl ester monomer and about 0 to about 15 parts by weight of vinyl cyanide monomer; wherein the difference between the refractive index of the rubbery copolymer and the matrix resin is about 0.005 or less and the transparent rubber-modified styrenic resin composition has a haze of about 5% or less as measured by a Nippon Denshoku Haze meter using a 3 mm thick test sample.Type: ApplicationFiled: January 27, 2009Publication date: June 4, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Byeong Do LEE, Young Sub JIN, Hwan Seok PARK, Jae Keun HONG
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Patent number: 7541401Abstract: Disclosed herein is an impact modifier for a polymer composition and a method of preparing the same. The impact modifier includes a core comprising a polyorganosiloxane, an acrylate polymer and a styrenic polymer; and a shell generally surrounding the core, the shell comprising a polymer attached to the core. The method includes providing a silicone rubber particle; adding a polymerizable styrenic compound into the silicone rubber particle; polymerizing the polymerizable styrenic compound within the particle to provide a styrenic polymer; adding a polymerizable acrylic compound into the silicone rubber particle; polymerizing the polymerizable acrylic compound within the silicone rubber particle to provide an acrylate polymer; and grafting a polymerizable compound onto the silicone rubber particle to provide a shell substantially surrounding the silicone rubber particle comprising the styrenic polymer and the acrylate polymer.Type: GrantFiled: December 28, 2005Date of Patent: June 2, 2009Assignee: Cheil Industries Inc.Inventors: Han Su Lee, Byeong Do Lee, Sung Sig Min, Byung Choon Lee
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Publication number: 20090124750Abstract: Disclosed herein is a transparent thermoplastic resin comprising a rubber phase including an aromatic rubbery block copolymer resin, and a resin phase including a terpolymer comprising an aromatic vinyl compound, a vinyl cyanide compound and an unsaturated alkyl ester compound, wherein the rubber phase and the resin phase have a co-continuous phase structure.Type: ApplicationFiled: November 3, 2008Publication date: May 14, 2009Applicant: CHEIL INDUSTRIES INC.Inventors: Jae Keun HONG, Byeong Do LEE, Young Sub JIN, Hwan Seok PARK, Ho Ryong SUN
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Publication number: 20080255270Abstract: A method of preparing a styrene polymer-silica nanocomposite is disclosed. One embodiment of the method includes polymerizing about 100 parts by weight of a monomer mixture including about 50 to about 80% by weight of an aromatic monomer and about 20 to about 50% by weight of a vinyl cyanide monomer with about 0.5 to about 30 parts by weight of a colloidal silica dispersed in a first organic solvent.Type: ApplicationFiled: May 30, 2008Publication date: October 16, 2008Applicant: CHEIL INDUSTRIES INC.Inventors: Byeong Do LEE, Young Sub JIN, Hwan Seok PARK, Jae Keun HONG, Young Sik RYU, Il Jin KIM
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Patent number: 6777483Abstract: A method of preparing a diene rubber latex having large size particles, good stability and reduced coagulum during polymerization wherein the method comprises: (a) pretreating a seed diene rubber latex with an anionic emulsifier and a non-ionic emulsifier, (b) adjusting the pH of an unsaturated carboxylic acid-containing copolymer latex to about 5 to 11 and adjusting the solids content of the copolymer latex to about 1 to 10% by weight solids content to produce an agglomerating latex solution, and (c) adding the pretreated seed diene rubber latex of step (a) to the agglomerating latex solution of step (b). Step (c) must be carried out by adding the pretreated seed diene rubber latex to the agglomerating latex. If the agglomerating latex is added to the rubber latex, an undesirable level of coagulum is produced.Type: GrantFiled: August 6, 2002Date of Patent: August 17, 2004Assignee: Cheil Industries Inc.Inventors: Byeong-Do Lee, Ki-bo Chang, Kwang-Yeol Lim, Dong-Won Jun
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Patent number: 6656999Abstract: The present invention provides a method of preparing a synthetic rubber latex having a large particle size, showing good stability and reducing coagulum during polymerization, which comprises (a) pretreating a seed synthetic rubber latex by mixing the seed synthetic rubber latex with deionized water and a small amount of an emulsifier and stirring, (b) preparing an agglomerating latex with a pH value of about 5.0˜8.0 by mixing a copolymer latex containing unsaturated acid having from about 10 to about 50% by weight of solid content with deionized water and a pH controlling agent, and (c) adding the pretreated seed synthetic rubber latex of step (a) to the agglomerating latex of step (b). The step (c) may be carried out by adding the pretreated seed synthetic rubber latex dropwisely to the agglomerating latex containing unsaturated acid for about 30 minutes to about 1 hour.Type: GrantFiled: October 27, 2000Date of Patent: December 2, 2003Assignee: Cheil Industries Inc.Inventors: Byeong-Do Lee, Sang-Dong Park, Young-Sun Jun, Kwang-Yeol Lim, Sang-Kyu Park
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Patent number: 6646032Abstract: A flameproof thermoplastic resin composition of the present invention comprises (A) a base resin comprising 40 to 95% by weight of a rubber modified styrene-containing resin (a1) composed of 20 to 100% by weight of a styrene-containing graft copolymer resin (a11) and 0 to 80% by weight of a styrene-containing copolymer resin (a12), and 60 to 5% by weight of polyphenylene ether resin (a2); (B) 2 to 40 parts by weight of a styrene-acrylonitrile copolymer containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the base resin; (C) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound having a melting point of more than 90° C. per 100 parts by weight of the base resin; and (D) 3 to 30 parts by weight of a phenolic resin per 100 parts by weight of the base resin.Type: GrantFiled: December 6, 2001Date of Patent: November 11, 2003Assignee: Cheil Industries Inc.Inventors: Bok-nam Jang, Se-jong Kim, Gyu-cheol Lee, Young-kil Chang, Byeong-do Lee, Jung-hyun Kim
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Publication number: 20020198309Abstract: A method of preparing a diene rubber latex having large size particles, good stability and reduced coagulum during polymerization wherein the method comprises:Type: ApplicationFiled: August 6, 2002Publication date: December 26, 2002Applicant: CHEIL INDUSTRIES INC.Inventors: Byeong-Do Lee, Ki-Bo Chang, Kwang-Yeol Lim, Dong-Won Jun
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Publication number: 20020065343Abstract: A flameproof thermoplastic resin composition of the present invention comprises (A) a base resin comprising 40 to 95% by weight of a rubber modified styrene-containing resin (a1) composed of 20 to 100% by weight of a styrene-containing graft copolymer resin (a11) and 0 to 80% by weight of a styrene-containing copolymer resin (a12), and 60 to 5% by weight of polyphenylene ether resin (a2); (B) 2 to 40 parts by weight of a styrene-acrylonitrile copolymer containing 5 to 18% by weight of acrylonitrile per 100 parts by weight of the base resin; (C) 5 to 30 parts by weight of an aromatic phosphoric acid ester compound having a melting point of more than 90° C. per 100 parts by weight of the base resin; and (D) 3 to 30 parts by weight of a phenolic resin per 100 parts by weight of the base resin.Type: ApplicationFiled: December 6, 2001Publication date: May 30, 2002Applicant: Cheil Industries Inc.Inventors: Bok-Nam Jang, Se-Jong Kim, Guy-Cheol Lee, Young-Kil Chang, Byeong-Do Lee, Jung-Hyun Kim
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Patent number: 6365669Abstract: A method for preparing a polybutadiene latex comprises providing an emulsion polymerization medium by reacting a mixture of water, butadiene monomers, a surfactant, a chain transfer agent, an initiator and an electrolyte, preferably at a temperature of about 60˜80° C., preferably for about 8˜16 hours, and agglomerating the resulting emulsion polymerization medium, preferably at a temperature of about 5˜20° C. higher than the polymerization temperature, preferably for about 4˜12 hours by adding a surfactant and an agglomerating agent to the emulsion polymerization medium in consecutive order.Type: GrantFiled: October 22, 1998Date of Patent: April 2, 2002Assignee: Cheil Industries Inc.Inventors: Byeong-do Lee, Dong-un Jin
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Patent number: 5985993Abstract: A method for preparing a polybutadiene latex comprises providing an emulsion polymerization medium by reacting water, butadiene monomers, a surfactant, a chain transfer agent, an initiator and an electrolyte, preferably at a temperature of about 60.about.80.degree. C., preferably for about 8.about.16 hours, and agglomerating the resulting emulsion polymerization medium, preferably at a temperature of about 5.about.20.degree. C. higher than the polymerization temperature, preferably for about 4.about.12 hours by adding a surfactant and an agglomerating agent to the emulsion polymerization medium in consecutive order. The agglomerating agent is prepared a method comprising a first step of forming agglomerating seeds by batch polymerization of an alkyl acrylate of C.sub.1 .about.C.sub.12, an anionic surfactant and an anionic initiator, a second step of growing the agglomerating agent in semi-batch polymerization by adding an alkyl acrylate of C.sub.1 .about.C.sub.Type: GrantFiled: December 30, 1996Date of Patent: November 16, 1999Assignee: Cheil Industries, Inc.Inventors: Byeong-do Lee, Dong-un Jin