Patents by Inventor Jae-Il Chung
Jae-Il Chung 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: 11851527Abstract: This invention relates to polyamide-10 and a method for preparing the same, and according to this invention, polyamide-10 having superior mechanical and thermal properties can be prepared by preparing polyamide-10 while controlling the condensation polymerization conditions of 10-aminodecanoic acid.Type: GrantFiled: November 27, 2019Date of Patent: December 26, 2023Assignee: SK Chemicals Co., Ltd.Inventors: Chong Kwon Pae, Min Soo Kim, Soo-Hyun Kim, Jae Kyun Park, Jeong Ho Park, Jong-In Lee, Chang-yeol Lee, Jae-Il Chung, Hyun Jun Cho
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Patent number: 11608413Abstract: Provided are a polytrimethylene ether glycol and a preparation method thereof, wherein various by-products and oligomers may be effectively removed from a polytrimethylene ether glycol product without exposing to a high temperature for a long period of time, and therefore, a molecular weight variation may be reduced due to the removal of various by-products and low molecular weight oligomers.Type: GrantFiled: September 11, 2018Date of Patent: March 21, 2023Inventors: Jae-Il Chung, Hyun Jun Cho, Han-Seok Kim, Deug-Soo Kim
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Publication number: 20220214346Abstract: The present invention relates to a biomarker composition for diagnosing and predicting prognosis of prostate cancer, and that the detection rate and expression level of gene combination composed with AR (Androgen receptor), AR-V7 (Androgen receptor variant 7), EpCAM (Epithelial cell adhesion molecule) in blood tumor cells (CTC) isolated from patients, Epithelial cell adhesion molecule), KRT-19 (Cytokeratin 19), PSA (Prostate specific antigen), and PSMA (Prostate specific membrane antigen) in circulating tumor cells (CTCs) isolated from patients is related to the level of malignancy in prostate cancer is confirmed and thus the gene combination provides as a biomarker for prostate cancer diagnosis and a biomarker for prognosis prediction of prostate cancer.Type: ApplicationFiled: April 28, 2021Publication date: July 7, 2022Applicants: INJE UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, SEOUL NATIONAL UNIVERSITY HOSPITALInventors: Jae Seung CHUNG, Ki-Ho HAN, Hyung Seok CHO, Jae Il CHUNG, Seok-Soo BYUN
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Publication number: 20220025116Abstract: This invention relates to polyamide-10 and a method for preparing the same, and according to this invention, polyamide-10 having superior mechanical and thermal properties can be prepared by preparing polyamide-10 while controlling the condensation polymerization conditions of 10-aminodecanoic acid.Type: ApplicationFiled: November 27, 2019Publication date: January 27, 2022Inventors: Chong Kwon PAE, Min Soo KIM, Soo-Hyun KIM, Jae Kyun PARK, Jeong Ho PARK, Jong-In LEE, Chang-yeol LEE, Jae-IL CHUNG, Hyun Jun CHO
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Patent number: 11118051Abstract: The present invention relates to a polylactic acid resin composition and a molded product using same. Since the polylactic acid resin composition according to the present invention has excellent environmental friendliness and biodegradability, has excellent heat resistance characteristics due to high heat deformation temperature (HDT), and may be injection molded within a commercially reasonable cycle time due to high crystallinity and crystallization rate, it is suitable for the preparation of a molded product.Type: GrantFiled: January 24, 2017Date of Patent: September 14, 2021Assignee: SK CHEMICALS CO., LTD.Inventors: Min-young Kim, Tae-Young Kim, Jeoung-Jun Hwang, Jae-il Chung
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Publication number: 20200283622Abstract: The present invention relates to a polylactic acid resin composition and a molded product using same. Since the polylactic acid resin composition according to the present invention has excellent environmental friendliness and biodegradability, has excellent heat resistance characteristics due to high heat deformation temperature (HDT), and may be injection molded within a commercially reasonable cycle time due to high crystallinity and crystallization rate, it is suitable for the preparation of a molded product.Type: ApplicationFiled: January 24, 2017Publication date: September 10, 2020Applicant: SK CHEMICALS CO., LTD.Inventors: Min-young KIM, Tae-Young KIM, Jeoung-Jun HWANG, Jae-il CHUNG
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Publication number: 20200277437Abstract: Provided are a polytrimethylene ether glycol and a preparation method thereof, wherein various by-products and oligomers may be effectively removed from a polytrimethylene ether glycol product without exposing to a high temperature for a long period of time, and therefore, a molecular weight variation may be reduced due to the removal of various by-products and low molecular weight oligomers.Type: ApplicationFiled: September 11, 2018Publication date: September 3, 2020Inventors: Jae-IL CHUNG, Hyun Jun CHO, Han-Seok KIM, Deug-Soo KIM
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Patent number: 10501604Abstract: The present invention relates to a polylactic acid resin composition having eco-friendly properties, which can be effectively used as a packaging material due to improved flexibility and moisture resistance, as well as superior general properties such as mechanical properties, transparency, heat resistance, an anti-blocking property, and film processability. The inventive polylactic acid resin composition comprises a polylactic acid resin comprising a hard segment comprising a polylactic acid repeating unit and a soft segment comprising a polyolefin-based polyol repeating unit in which polyolefin-based polyol structural units are linked in a linear or branched manner via a urethane bond or an ester bond, wherein the organic carbon content (% Cbio) of biomass-based carbon, as defined in Equation 1, is at least 60 wt %; and an antioxidant.Type: GrantFiled: April 2, 2014Date of Patent: December 10, 2019Assignee: SK Chemicals Co., Ltd.Inventors: Young-Man Yoo, Jae-il Chung, Kye Yune Lee, Sung-wan Jeon, Min-young Kim
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Patent number: 10087282Abstract: The present invention relates to a polylactic acid resin composition which has a low glass transition temperature, fusion temperature, and enthalpy of fusion, can be crystallized under commercially meaningful processing conditions, has good film processability such as extrusion properties, has excellent storage stability, and is highly biodegradable. The polylactic acid resin composition comprises a block copolymer comprising a hard segment and a soft segment, the hard segment comprising polylactic acid repeat units, and the soft segment comprising polyurethane polyol repeat units which have polyether-based polyol repeat units linearly connected via a urethane bond, wherein the soft segment is contained by 5% to 35% by weight based on the weight of the block copolymer, and the polylactic acid repeat units include poly(L-lactic acid) repeat units and poly(D-lactic acid) repeat units by a molar ratio of 94:6 to 88:12.Type: GrantFiled: June 1, 2015Date of Patent: October 2, 2018Assignee: SK CHEMICALS CO., LTD.Inventors: Jae-il Chung, Tae-young Kim, Sung-wan Jeon, Min-young Kim
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Publication number: 20170198089Abstract: The present invention relates to a polylactic acid resin composition which has a low glass transition temperature, fusion temperature, and enthalpy of fusion, can be crystallized under commercially meaningful processing conditions, has good film processability such as extrusion properties, has excellent storage stability, and is highly biodegradable. The polylactic acid resin composition comprises a block copolymer comprising a hard segment and a soft segment, the hard segment comprising polylactic acid repeat units, and the soft segment comprising polyurethane polyol repeat units which have polyether-based polyol repeat units linearly connected via a urethane bond, wherein the soft segment is contained by 5% to 35% by weight based on the weight of the block copolymer, and the polylactic acid repeat units include poly(L-lactic acid) repeat units and poly(D-lactic acid) repeat units by a molar ratio of 94:6 to 88:12.Type: ApplicationFiled: June 1, 2015Publication date: July 13, 2017Inventors: Jae-il CHUNG, Tae-young KIM, Sung-wan JEON, Min-young KIM
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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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Patent number: 9567428Abstract: 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: GrantFiled: November 2, 2011Date of Patent: February 14, 2017Inventors: Young-Man Yoo, Tae-Woong Lee, Kye-Yune Lee, Jae-Il Chung
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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: 20160053089Abstract: The present invention relates to a polylactic acid resin composition having eco-friendly properties, which can be effectively used as a packaging material due to improved flexibility and moisture resistance, as well as superior general properties such as mechanical properties, transparency, heat resistance, an anti-blocking property, and film processability. The inventive polylactic acid resin composition comprises a polylactic acid resin comprising a hard segment comprising a polylactic acid repeating unit and a soft segment comprising a polyolefin-based polyol repeating unit in which polyolefin-based polyol structural units are linked in a linear or branched manner via a urethane bond or an ester bond, wherein the organic carbon content (% Cbio) of biomass-based carbon, as defined in Equation 1, is at least 60 wt %; and an antioxidant.Type: ApplicationFiled: April 2, 2014Publication date: February 25, 2016Inventors: Young-Man Yoo, Jae-il Chung, Kye Yune Lee, Sung-wan Jeon, Min-young Kim
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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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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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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