Patents by Inventor Tae Woong Lee
Tae Woong 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: 9567429Abstract: The present invention relates to a polylactic acid resin film which has excellent flexibility, mechanical properties, stability, and transparency while having a specific biodegradability of the polylactic acid resin, and is useful as a packaging material. The present invention provides a polylactic acid resin film, comprising a polylactic acid resin including a hard segment comprising a specific polylactic acid repeating unit, and a soft segment comprising a polyurethane polyol repeating unit in which a specific polyether polyol repeating units are linearly linked via a urethane bond, wherein the total Young's modulus in both machine direction and transverse direction of the film is 350 to 750 kgf/mm2, and the total initial tensile strength in both machine direction and transverse direction of the film is 20 kgf/mm2 or more.Type: GrantFiled: November 2, 2011Date of Patent: February 14, 2017Inventors: Young-Man Yoo, Jae-Il Chung, Tae-Woong Lee, Kye-Yune Lee
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Publication number: 20160369094Abstract: Provided is a polymer resin composition capable of providing an environmentally friendly biomass-containing synthetic resin which exhibits improved chemical resistance. Provided is a high heat resistant polymer resin composition having excellent chemical resistance, the composition including a polyester copolymer containing a residue of a dicarboxylic acid component containing terephthalic acid and a residue of a diol component containing dianhydrohexitol; one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkylmethacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkylmethacrylate-silicone/alkylacrylate graft copolymer; and polytrimethylene terephthalate, and having 0.Type: ApplicationFiled: June 23, 2014Publication date: December 22, 2016Applicant: SK CHEMICALS CO., LTD.Inventors: Dong-Cheol SOHN, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20160369092Abstract: Provided are components for vehicles, electric/electronic products, home appliances, office equipments or household items, which are manufactured using a high heat resistant polymer resin composition capable of providing an environmentally friendly biomass-containing synthetic resin which exhibits improved chemical resistance.Type: ApplicationFiled: June 23, 2014Publication date: December 22, 2016Applicant: SK Chemicals Co., Ltd.Inventors: Dong-Cheol SOHN, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20160347950Abstract: Disclosed is a resin composition for forming a steering wheel remote control bezel. The resin composition comprises: an amount of about 40 to 50 wt % of a polyester copolymer including a dicarboxylic acid component residue including terephthalic acid and a diol component residue including dianhydrohexitol; an amount of about 10 to 20 wt % of at least one copolymer selected from a group consisting of unsaturated nitrile-diene-based rubber-aromatic vinyl grafted copolymers and alkylmethacrylate-diene-based rubber-aromatic vinyl grafted copolymers; and an amount of about 40 to 50 wt % of polycarbonate. Further, an amount of 0.1 to 0.5 parts by weight of a phosphate base antioxidant-based on 100 parts by weight of the resin composition is further added to the resin composition.Type: ApplicationFiled: February 6, 2015Publication date: December 1, 2016Inventors: Dong-Cheol Sohn, Jong Ryang Kim, Tae-Woong Lee, Jong-Wook Shin, Han Ki Lee, Kyeong Hoon Jang, Dae Sik Kim, Myoung Ryoul Lee, Hak Soo Kim, Jung Gyun Noh
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Patent number: 9499658Abstract: The present invention relates to a polylactic acid resin and a packaging film comprising the same, wherein the polylactic acid resin is useful as a packaging material due to excellent properties including heat resistance as well as optimized flexibility. The polylactic acid resin comprises: a hard segment including a predetermined polylactic acid repeating unit; and a soft segment including a polyurethane polyol repeating unit in which certain polyether-based polyol repeating units are linearly connected in a medium of a urethane bond. In addition, the polylactic acid resin has a glass transition temperature (Tg) of 25-55° C.Type: GrantFiled: November 2, 2011Date of Patent: November 22, 2016Inventors: Young-Man Yoo, Tae-Woong Lee, Kye-Yune Lee, Jae-Il Chung
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Patent number: 9469719Abstract: The present invention relates to a polylactic acid resin and a packaging film comprising the same, wherein the polylactic acid resin is useful as a packaging material due to excellent properties including heat resistance as well as optimized flexibility. The polylactic acid resin comprises: a hard segment including a predetermined polylactic acid repeating unit; and a soft segment including a polyurethane polyol repeating unit in which certain polyether-based polyol repeating units are linearly connected in a medium of a urethane bond. In addition, the polylactic acid resin has a glass transition temperature (Tg) of 25-55° C.Type: GrantFiled: November 2, 2011Date of Patent: October 18, 2016Inventors: Young-Man Yoo, Tae-Woong Lee, Kye-Yune Lee, Jae-Il Chung
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Publication number: 20160272787Abstract: The present invention relates to a polycyclohexylenedimethylene terephthalate resin composition having improved reflectivity, heat resistance, and yellowing resistance. The resin composition according to one embodiment of the present invention includes 40 to 95 wt % of polycyclohexylenedimethylene terephthalate resin; 1 to 50 wt % of a white pigment; and 1 to 50 wt % of a filler, and the amount of germanium (Ge) atoms remaining in the resin is 30 to 1,000 ppm based on the weight of the resin.Type: ApplicationFiled: November 11, 2014Publication date: September 22, 2016Inventors: Kyu-Tae PARK, Min-Goo KANG, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20160251512Abstract: The present invention relates to a polymer resin composition including: one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft copolymer; a polyester resin; a polycarbonate resin; and a block copolymer including two or more alkylene-based repeating units having 2 to 10 carbon atoms and an aromatic vinyl-based repeating unit, and a molded article thereof. According to the present invention, a polymer resin composition providing an environment-friendly biomass-containing synthetic resin representing improved chemical resistance, and a polymer resin molded article obtained using the same may be provided.Type: ApplicationFiled: September 4, 2014Publication date: September 1, 2016Inventors: Dong-Cheol SOHN, Kye Yune LEE, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20160137834Abstract: The present invention relates to a polymer resin composition that is capable of providing an environmentally friendly biomass-containing synthetic resin having improved chemical resistance. The present invention provides a polymer resin composition including: a polyester copolymer including a residue of a dicarboxylic acid component containing terephthalic acid, and a residue of a diol component including dianhydrohexitol; and one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft copolymer, and which has a tensile strength loss defined in the following Equation 1 ranging from 0.5 to 30%.Type: ApplicationFiled: June 11, 2014Publication date: May 19, 2016Applicant: SK Chemicals Co., Ltd.Inventors: Dong-Cheol SOHN, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20160137835Abstract: The present invention relates to parts for automobiles, electrical/electronic devices, home appliances, office equipment, or daily necessities, which are manufactured by using a polymer resin composition that is capable of providing an environmentally friendly biomass-containing synthetic resin having improved chemical resistance.Type: ApplicationFiled: June 11, 2014Publication date: May 19, 2016Inventors: Dong-Cheol SOHN, Tae-Woong LEE, Jong-Wook SHIN
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Publication number: 20150147549Abstract: The present invention relates to a polylactic acid resin which is environment-friendly and is useful as a packaging material due to its properties including excellent heat resistance and flexibility, and a packaging film comprising the same. The polylactic acid resin comprises a hard segment comprising a polylactic acid repeating unit; and a soft segment comprising a polyurethane polyol repeating unit in which polyether polyol repeating units are linearly linked via a urethane bond, wherein the polylactic acid resin has an organic carbon content (% Cbio) from the biomass source of 60 wt % or more.Type: ApplicationFiled: May 29, 2013Publication date: May 28, 2015Applicant: SKI CHEMICALS CO.,LTD.Inventors: Young-Man Yoo, Jae-Il Chung, Tae-Woong Lee, Kye Yune Lee, Sung-Wan Jeon
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Patent number: 8883386Abstract: Disclosed herein is a toner for use in an electronic photograph-duplicating process or in an electrostatic printing process, and a polyester resin included in the toner as a binder. The polyester resin comprises lactic acids (D or L-lactic acids) or lactides (D or L-lactides) which are derivative compounds thereof, and dianhydrohexitols which are bio-derived sugar derivatives.Type: GrantFiled: January 6, 2011Date of Patent: November 11, 2014Assignee: SK Chemicals Co., Ltd.Inventors: Young Man Yoo, Kye Yune Lee, Tae Woong Lee, Jong Wook Shin
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Publication number: 20140302297Abstract: The present invention relates to a polylactic acid resin composition useful as a packaging material which has not only improved flexibility but also superior external appearance and superior properties such as mechanical property, transparency, heat resistance, anti-blocking property, workability of a film, and the like, and a packaging film including the same. The polylactic acid resin composition comprises a polylactic acid resin including a hard segment comprising a polylactic acid repeating unit and a soft segment comprising a polyurethane polyol repeating unit in which polyether polyol repeating units are linearly linked via a urethane bond; and a specific content of antioxidant.Type: ApplicationFiled: November 2, 2011Publication date: October 9, 2014Applicant: SK CHEMICALS CO., LTD.Inventors: Young-Man Yoo, Tae-Woong Lee, Kye-Yune Lee, Jae-Il Chung
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Patent number: 8808843Abstract: Disclosed is a transparent multilayer sheet that is excellent in antistatic properties, as well as transparency. The transparent multilayer sheet includes a surface layer comprising a conductive thermoplastic polyurethane or polyurea resin containing ethylene oxide; and a back layer attached to the surface layer and comprising a transparent non-conductive polymer resin. Preferably, the polyurethane or polyurea resin is a polymerization product of (a) a polyether-based polymer containing ethylene oxide and reacting with an isocyanate group; (b) an aromatic or aliphatic diisocyanate compound; and (c) a chain extender C2 to C10 containing a primary hydroxyl group or an amine group, and the transparent non-conductive polymer resin is selected from the group consisting of polyethylene terephthalate, glycol modified polyethylene tereph-thalate, glycol modified polycyclohexaneterephthalate, polymethylmethacrylate, polycarbonate, transparent acrylonitrile-butadiene-styrene (ABS), and mixtures thereof.Type: GrantFiled: December 22, 2008Date of Patent: August 19, 2014Assignee: Lubrizol Advanced Materials, Inc.Inventors: Hwa Yong Lee, Tae Woong Lee, Dong Sik Kim, Nam Jung Kim, Young Woo Kim
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Patent number: 8668845Abstract: A method for preparing an electrostatic dissipative polymer and a blend of a thermoplastic polymer and the ESD polymer is disclosed. The method for preparing an electrostatic dissipative polymer includes the step of polymerizing the electrostatic dissipative polymer in the presence of a reactive solvent and lithium salt dissolved in the reactive solvent, wherein the amount of the reactive solvent is from 0.1 to 20 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, the amount of lithium salt is from 0.1 to 5 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, and the reactive solvent is aliphatic glycol having from 2 to 8 carbon atoms and having a primary alcohol group, or aromatic glycol having from 6 to 10 carbon atoms.Type: GrantFiled: October 22, 2010Date of Patent: March 11, 2014Assignee: Lubrizol Advanced Materials, Inc.Inventors: Chang-Min Suh, Tae-Woong Lee, Dong-Sik Kim
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Publication number: 20140037931Abstract: The present invention relates to a polylactic acid resin film which has excellent flexibility, mechanical properties, stability, and transparency while having a specific biodegradability of the polylactic acid resin, and is useful as a packaging material. The present invention provides a polylactic acid resin film, comprising a polylactic acid resin including a hard segment comprising a specific polylactic acid repeating unit, and a soft segment comprising a polyurethane polyol repeating unit in which a specific polyether polyol repeating units are linearly linked via a urethane bond, wherein the total Young's modulus in both machine direction and transverse direction of the film is 350 to 750 kgf/mm2, and the total initial tensile strength in both machine direction and transverse direction of the film is 20 kgf/mm2 or more.Type: ApplicationFiled: November 2, 2011Publication date: February 6, 2014Applicant: SK CHEMICALS CO., LTD.Inventors: Young-Man Yoo, Jae-Il Chung, Tae-Woong Lee, Kye-Yune Lee
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Publication number: 20140004330Abstract: The present invention relates to a polylactic acid resin and a packaging film comprising the same, wherein the polylactic acid resin is useful as a packaging material due to excellent properties including heat resistance as well as optimized flexibility. The polylactic acid resin comprises: a hard segment including a predetermined polylactic acid repeating unit; and a soft segment including a polyurethane polyol repeating unit in which certain polyether-based polyol repeating units are linearly connected in a medium of a urethane bond. In addition, the polylactic acid resin has a glass transition temperature (Tg) of 25-55° C.Type: ApplicationFiled: November 2, 2011Publication date: January 2, 2014Applicant: SK CHEMICALS CO., LTD.Inventors: Young-Man Yoo, Tae-Woong Lee, Kye-Yune Lee, Jae-II Chung
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Patent number: 8545728Abstract: A method for preparing an electrostatic dissipative polymer and a blend of a thermoplastic polymer and the ESD polymer is disclosed. The method for preparing an electrostatic dissipative polymer includes the step of polymerizing the electrostatic dissipative polymer in the presence of a reactive solvent and lithium salt dissolved in the reactive solvent, wherein the amount of the reactive solvent is from 0.1 to 20 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, the amount of lithium salt is from 0.1 to 5 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, and the reactive solvent is aliphatic glycol having from 2 to 8 carbon atoms and having a primary alcohol group, or aromatic glycol having from 6 to 10 carbon atoms.Type: GrantFiled: January 21, 2005Date of Patent: October 1, 2013Assignee: Lubrizol Advanced Materials, Inc.Inventors: Chang-Min Suh, Tae-Woong Lee, Dong-Sik Kim
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Publication number: 20120330061Abstract: This disclosure relates to a method for preparing N,N?-dimethyl-3,3?-dithiodipropionamides, which is an intermediate compound used for preparation of substituted 3-isothiazolones, including reacting 3,3?-dithiopropionic acid alkyl ester with an alkylamine at a temperature of from 0 to 50° C. in the presence of a polar solvent.Type: ApplicationFiled: December 6, 2010Publication date: December 27, 2012Applicant: SK Chemicals Co., Ltd.Inventors: Jae-Min Ha, Jeong-Soo Yu, Tae-Woong Lee, Jeong-Joo Shin
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Patent number: 8313881Abstract: A toner for an electrophotographic image forming process or an electrostatic printing process, and a polyester resin for the toner are disclosed. The polyester resin comprises: acid components including 70 to 96 mol % of aromatic dibasic acid component, 3 to 20 mol % of cycloaliphatic dibasic acid component, and 1 to 10 mol % of trivalent or higher acid component; alcohol components including 10 to 50 mol % of cycloaliphatic diol component, 2 to 20 mol % of trihydric or higher alcohol component, and 30 to 88 mol % of aliphatic diol component; and a heat stabilizer.Type: GrantFiled: July 10, 2008Date of Patent: November 20, 2012Assignee: SK Chemicals Co., Ltd.Inventors: Young-Man Yoo, Jae-Kyoung Roh, Kye-Yune Lee, Tae-Woong Lee