Patents by Inventor Jun Man Choi
Jun Man 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: 11873425Abstract: An adhesive composition and an adhesive film including a cured product thereof is provided.Type: GrantFiled: October 19, 2018Date of Patent: January 16, 2024Inventors: Jae Sung Hong, Ho Kyung Song, Sle Lee, Jun Man Choi, Jang Soon Kim
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Patent number: 11725126Abstract: Provided is a multilayer adhesive tape having excellent step coverage and reworkability. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which the intermediate adhesive layer includes an intermediate adhesive polymer including: a polymerization unit of an alkyl group-containing (meth)acrylate monomer; a polymerization unit of a carboxyl group-containing monomer; and a polymerization unit of an acrylamide-based monomer.Type: GrantFiled: May 18, 2018Date of Patent: August 15, 2023Inventors: Jae Sung Hong, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Ho Kyung Song, Jang Soon Kim, Sle Lee, Kwang Su Seo
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Patent number: 11697749Abstract: A multilayer adhesive tape is provided, including: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer sequentially. At least one of the first outer adhesive layer and the second outer adhesive layer includes a cured product of an outer adhesive composition including a high molecular weight prepolymer having a weight average molecular weight of 100,000 g/mol or more and 1,500,000 g/mol or less and a low molecular weight prepolymer having a weight average molecular weight of 1,000 g/mol or more and 80,000 g/mol or less.Type: GrantFiled: November 2, 2018Date of Patent: July 11, 2023Inventors: Sle Lee, Ho Kyung Song, Jae Sung Hong, Jun Man Choi, Jang Soon Kim
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Patent number: 11549036Abstract: A multilayer adhesive tape in which an interface separation between layers does not occur even at in extremely low temperature atmosphere is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which attaching force among the first outer adhesive layer, the intermediate adhesive layer, and the second outer adhesive layer is maintained after the multilayer adhesive tape is treated in liquefied nitrogen for 15 seconds.Type: GrantFiled: May 18, 2018Date of Patent: January 10, 2023Inventors: Hokyung Song, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Jae Sung Hong, Jang Soon Kim, Sle Lee, Kwang Su Seo
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Patent number: 11512152Abstract: A method of preparing an acrylic adhesive, in which the durability of an adhesive film may be improved through additional photocuring and the residual components according to solution photopolymerization are efficiently removed, and an adhesive film prepared therefrom.Type: GrantFiled: February 27, 2018Date of Patent: November 29, 2022Inventors: Jun Man Choi, Sang Hwan Kim, Jang Soon Kim, Kwang Su Seo, Won Gu Choi, Chi Gwan An
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Patent number: 11427658Abstract: A method for manufacturing a low molecular weight acrylic resin, and more particularly, to a method for manufacturing a low molecular weight acrylic resin having a high conversion rate and a low poly dispersion index includes maintaining the temperature of a reacting part with a screw stirrer at a specific temperature during a continuous polymerization of a solvent-free acrylic composition in a continuous flow reactor having the reacting part.Type: GrantFiled: January 11, 2019Date of Patent: August 30, 2022Inventors: Woo Yeon Kim, Jun Man Choi, Jang Soon Kim, Kwang Su Seo
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Patent number: 11319463Abstract: A multilayer adhesive film is provided including: a first outer adhesive layer; a second outer adhesive layer; and an intermediate adhesive layer disposed between the first outer adhesive layer and the second outer adhesive layer. The multilayer adhesive film has both high step absorbency and excellent reworkability.Type: GrantFiled: October 11, 2019Date of Patent: May 3, 2022Inventors: Hu Young Yoon, Jae Sung Hong, Sle Lee, Jun Man Choi, Woo Yeon Kim, Ho Kyung Song
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Patent number: 11091674Abstract: A multilayer adhesive tape exhibiting high step coverage and having both high reworkability and excellent punchability is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which a glass transition temperature of the intermediate adhesive layer is ?40° C. or more and 0° C. or less, a glass transition temperature of each of the first outer adhesive layer and the second outer adhesive layer is ?60° C. or more and ?20° C. or less, and a difference in glass transition temperature between each of the first outer adhesive layer and the second outer adhesive layer and the intermediate adhesive layer is 5° C. or more and 25° C. or less.Type: GrantFiled: May 18, 2018Date of Patent: August 17, 2021Inventors: Sle Lee, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Ho Kyung Song, Jae Sung Hong, Jang Soon Kim, Kwang Su Seo
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Publication number: 20210130656Abstract: A multilayer adhesive film is provided including: a first outer adhesive layer; a second outer adhesive layer; and an intermediate adhesive layer disposed between the first outer adhesive layer and the second outer adhesive layer. The multilayer adhesive film has both high step absorbency and excellent reworkability.Type: ApplicationFiled: October 11, 2019Publication date: May 6, 2021Applicant: LG Chem, Ltd.Inventors: Hu Young YOON, Jae Sung HONG, Sle LEE, Jun Man CHOI, Woo Yeon KIM, Ho Kyung SONG
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Publication number: 20210079269Abstract: The present invention relates to a multilayer adhesive tape including: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer sequentially, in which at least one of the first outer adhesive layer and the second outer adhesive layer includes a cured product of an outer adhesive composition including a high molecular weight prepolymer having a weight average molecular weight of 100,000 g/mol or more and 1,500,000 g/mol or less and a low molecular weight prepolymer having a weight average molecular weight of 1,000 g/mol or more and 80,000 g/mol or less.Type: ApplicationFiled: November 2, 2018Publication date: March 18, 2021Applicant: LG Chem, Ltd.Inventors: Sle Lee, Ho Kyung Song, Jae Sung Hong, Jun Man Choi, Jang Soon Kim
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Publication number: 20200347160Abstract: A method for manufacturing a low molecular weight acrylic resin, and more particularly, to a method for manufacturing a low molecular weight acrylic resin having a high conversion rate and a low poly dispersion index includes maintaining the temperature of a reacting part with a screw stirrer at a specific temperature during a continuous polymerization of a solvent-free acrylic composition in a continuous flow reactor having the reacting part.Type: ApplicationFiled: January 11, 2019Publication date: November 5, 2020Applicant: LG Chem, Ltd.Inventors: Woo Yeon Kim, Jun Man Choi, Jang Soon Kim, Kwang Su Seo
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Publication number: 20200255691Abstract: An adhesive composition and an adhesive film including a cured product thereof is provided.Type: ApplicationFiled: October 19, 2018Publication date: August 13, 2020Applicant: LG Chem, Ltd.Inventors: Jae Sung Hong, Ho Kyung Song, Sle Lee, Jun Man Choi, Jang Soon Kim
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Publication number: 20200216724Abstract: An adhesive composition and an adhesive film are provided.Type: ApplicationFiled: September 28, 2018Publication date: July 9, 2020Applicant: LG Chem, Ltd.Inventors: Su Eun Lee, Joo Hyun Lee, Hu Young Yoon, Jun Man Choi, Jang Soon Kim, Kwang Su Seo
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Publication number: 20200172765Abstract: A multilayer adhesive tape in which an interface separation between layers does not occur even at in extremely low temperature atmosphere is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which attaching force among the first outer adhesive layer, the intermediate adhesive layer, and the second outer adhesive layer is maintained after the multilayer adhesive tape is treated in liquefied nitrogen for 15 seconds.Type: ApplicationFiled: May 18, 2018Publication date: June 4, 2020Applicant: LG Chem, Ltd.Inventors: Hokyung Song, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Jae Sung Hong, Jang Soon Kim, Sle Lee, Kwang Su Seo
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Publication number: 20200147939Abstract: Provided is a multilayer adhesive tape having excellent step coverage and reworkability. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which the intermediate adhesive layer includes an intermediate adhesive polymer including: a polymerization unit of an alkyl group-containing (meth)acrylate monomer; a polymerization unit of a carboxyl group-containing monomer; and a polymerization unit of an acrylamide-based monomer.Type: ApplicationFiled: May 18, 2018Publication date: May 14, 2020Applicant: LG Chem, Ltd.Inventors: Jae Sung Hong, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Ho Kyung Song, Jang Soon Kim, Sle Lee, Kwang Su Seo
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Publication number: 20200095484Abstract: A multilayer adhesive tape exhibiting high step coverage and having both high reworkability and excellent punchability is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which a glass transition temperature of the intermediate adhesive layer is ?40° C. or more and 0° C. or less, a glass transition temperature of each of the first outer adhesive layer and the second outer adhesive layer is ?60° C. or more and ?20° C. or less, and a difference in glass transition temperature between each of the first outer adhesive layer and the second outer adhesive layer and the intermediate adhesive layer is 5° C. or more and 25° C. or less.Type: ApplicationFiled: May 18, 2018Publication date: March 26, 2020Applicant: LG Chem, Ltd.Inventors: Sle Lee, Dong Hoon Lim, Ju Yong Seo, Jun Man Choi, Woo Yeon Kim, Ho Kyung Song, Jae Sung Hong, Jang Soon Kim, Kwang Su Seo
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Publication number: 20190338165Abstract: A method of preparing an acrylic adhesive, in which the durability of an adhesive film may be improved through additional photocuring and the residual components according to solution photopolymerization are efficiently removed, and an adhesive film prepared therefrom.Type: ApplicationFiled: February 27, 2018Publication date: November 7, 2019Applicant: LG Chem, Ltd.Inventors: Jun Man Choi, Sang Hwan Kim, Jang Soon Kim, Kwang Su Seo, Won Gu Choi, Chi Gwan An
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Patent number: 10131728Abstract: Provided is an acrylic syrup preparation method including the steps of: performing bulk photopolymerization by initiating a UV irradiation of a composition containing a photoinitiator and one or more types of acrylic monomers; stopping the UV irradiation at the time point when the temperature is increased by about 5° C. to about 40° C. from the time point when the temperature at which the UV irradiation of the composition is initiated; and purging the composition with an oxygen-containing inert gas after the UV irradiation is stopped.Type: GrantFiled: September 23, 2015Date of Patent: November 20, 2018Assignee: LG Chem, Ltd.Inventors: Jun-Man Choi, Jang-Soon Kim
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Publication number: 20170283535Abstract: Provided is an acrylic syrup preparation method including the steps of: performing bulk photopolymerization by initiating a UV irradiation of a composition containing a photoinitiator and one or more types of acrylic monomers; stopping the UV irradiation at the time point when the temperature is increased by about 5° C. to about 40° C. from the time point when the temperature at which the UV irradiation of the composition is initiated; and purging the composition with an oxygen-containing inert gas after the UV irradiation is stopped.Type: ApplicationFiled: September 23, 2015Publication date: October 5, 2017Applicant: LG Chem, Ltd.Inventors: Jun-Man Choi, Jang-Soon Kim
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Patent number: 8981353Abstract: The present invention relates to a polymer memory device and to a production method for the same, and relates to a novel photocrosslinkable polymer compound able to be used in a polymer memory device, to a novel non-volatile memory device in which an active layer between an upper electrode and a lower electrode comprises a photocrosslinkable polyimide polymer, and to a production method for the same. In the polymer memory device, the photocrosslinkable polyimide polymer is used as an active layer.Type: GrantFiled: March 31, 2011Date of Patent: March 17, 2015Assignee: Postech Academy-Industry FoundationInventors: Moonhor Ree, Samdae Park, Suk Gyu Ham, Jin Chul Kim, Yong-gi Ko, Jun Man Choi, Taek Joon Lee, Dong Min Kim, Kyungtae Kim, Wonsang Kwon