Patents by Inventor Jae-gwan Lee
Jae-gwan 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: 10975274Abstract: Disclosed is an acrylic adhesive, including an acrylic polymer obtained by polymerizing a mixture of about 120 parts by weight to about 250 parts by weight of acrylic monomers with about 0.1 parts by weight to about 1 parts by weight of an azo initiator, about 0.5 parts by weight to about 1 parts by weight of a filler, about 1.5 parts by weight to about 2.5 parts by weight of a crosslinking agent, and about 0.5 parts by weight to 1 parts by weight of an anti-static agent.Type: GrantFiled: July 20, 2017Date of Patent: April 13, 2021Assignees: SAMSUNG DISPLAY CO., LTD., DONGGUAN DYT ELECTRONIC TAPE CO., LTD.Inventors: Sung Kim, Hyun Sook Kim, Jang Hwan Jeong, Sung Chan Jo, Kyung Lae Rho, Soo Im Jeong, Oh Jung Kwon, Sung Hwan Kim, Oh Nam Kwon, Jae Gwan Lee, Jung Hun Kim
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Patent number: 10100234Abstract: The present invention relates to an acrylic pressure-sensitive adhesive composition, and more particularly, to an acrylic pressure-sensitive adhesive composition capable of showing an excellent anti-static performance, and solving a transferring problem of additives and a problem concerning a balance of low-rate and high-rate peel strength, by comprising a) an acrylic copolymer including a monomer having a functional group capable of chelating with a metal salt, and a hydrophobic monomer and b) a metal salt.Type: GrantFiled: January 13, 2009Date of Patent: October 16, 2018Assignee: LG Chem, Ltd.Inventors: No Ma Kim, Jae Gwan Lee, An Na Lee
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Publication number: 20180022973Abstract: Disclosed is an acrylic adhesive, including an acrylic polymer obtained by polymerizing a mixture of about 120 parts by weight to about 250 parts by weight of acrylic monomers with about 0.1 parts by weight to about 1 parts by weight of an azo initiator, about 0.5 parts by weight to about 1 parts by weight of a filler, about 1.5 parts by weight to about 2.5 parts by weight of a crosslinking agent, and about 0.5 parts by weight to 1 parts by weight of an anti-static agent.Type: ApplicationFiled: July 20, 2017Publication date: January 25, 2018Inventors: Sung KIM, Hyun Sook KIM, Jang Hwan JEONG, Sung Chan JO, Kyung Lae RHO, Soo Im JEONG, Oh Jung KWON, Sung Hwan KIM, Oh Nam KWON, Jae Gwan LEE, Jung Hun KIM
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Patent number: 9534149Abstract: The present invention relates to an adhesive film and to a touch panel. According to the present invention, even when the adhesive film is applied to a touch panel, for example, a capacitive touch panel, and directly attached to a conductive layer, the adhesive film effectively prevents the resistance of the conductive layer from being raised and exhibits good heat resistance. In addition, according to the present invention, an adhesive film having superior durability, optical characteristics, cuttability, workability, wettability and resistance to warping is provided.Type: GrantFiled: March 14, 2011Date of Patent: January 3, 2017Assignee: LG HAUSYS, LTD.Inventors: Jang-Soon Kim, Min-Seok Song, Eok-Hyung Lee, Won-Gu Choi, Jae-Gwan Lee, Yong-Hoon Lee, Hak-Rhim Han
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Patent number: 9505961Abstract: The present invention relates to an acrylic pressure sensitive adhesive composition comprising a monomer containing linear carbonate having an antistatic property. The acrylic pressure sensitive adhesive composition exhibits an excellent balance between low-rate peel strength and high-rate peel strength, and is capable of lowering the content of an antistatic agent. It also provides excellent releasable property, and protection of the surface of a polarizer due to proper wettability.Type: GrantFiled: December 9, 2008Date of Patent: November 29, 2016Assignee: LG Chem, Ltd.Inventors: No-Ma Kim, Jae-Gwan Lee, An-Na Lee, Suk-Ky Chang
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Publication number: 20160152868Abstract: Provided are an adhesive composition for a touch panel, including: a hydrophilic functional group-containing monomer, wherein a dielectric constant at a frequency of 100 kHz to 2 MHz is 3.5 or less, and an adhesive film having an adhesive layer including a cured product of the adhesive composition for a touch panel. In addition, provided is a touch panel including: a conductive plastic film having a conductive layer formed on one surface; and an adhesive layer attached onto the conductive layer and including a cured product of the adhesive composition for a touch panel.Type: ApplicationFiled: February 27, 2014Publication date: June 2, 2016Applicant: LG Hausys, Ltd.Inventors: Chan Oh YOON, Eun Kyung PARK, Bu Gi JUNG, Jae Gwan LEE, Jang Soon KIM, Sung Chan PARK, Won Ho KIM
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Patent number: 9303130Abstract: Provided are a nanocomposite including a layered inorganic material and a random copolymer containing a hydrophobic monomer and a hydrophilic monomer, a polymer composition including the nanocomposite, and a method for preparing the polymer composition. The random copolymer can be prepared at a low cost in a simple process and function as a compatibilizer in small amounts to maintain excellent properties of the nanocomposite including excellent mechanical characteristics such as abrasion resistance, hardness, tensile modulus and tear resistance, excellent thermal characteristics, high liquid and gas permeability, and low flammability.Type: GrantFiled: November 20, 2008Date of Patent: April 5, 2016Assignee: LG CHEM, LTD.Inventors: No Ma Kim, Bong Keun Lee, Suk Ky Chang, Jae Gwan Lee
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Patent number: 9187677Abstract: Disclosed is an aqueous adhesive composition, the adhesive properties of which are barely degraded due to aging. The aqueous adhesive composition according to the present invention has the technical features of comprising a monomer having a hydroxyl group, and of not forming a chelate compound after polymerization. Thus, the aqueous adhesive composition has the advantages of having little reduction in adhesive properties thereof due to an increase in gel content.Type: GrantFiled: October 5, 2012Date of Patent: November 17, 2015Assignee: LG HAUSYS, LTD.Inventors: Han Na Lee, Jae Gwan Lee, Jang Soon Kim
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Publication number: 20140350165Abstract: Disclosed is an aqueous adhesive composition, the adhesive properties of which are barely degraded due to aging. The aqueous adhesive composition according to the present invention has the technical features of comprising a monomer having a hydroxyl group, and of not forming a chelate compound after polymerization. Thus, the aqueous adhesive composition has the advantages of having little reduction in adhesive properties thereof due to an increase in gel content.Type: ApplicationFiled: October 5, 2012Publication date: November 27, 2014Inventors: Han Na Lee, Jae Gwan Lee, Jang Soon Kim
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Publication number: 20120231245Abstract: The present invention relates to an adhesive film and to a touch panel. According to the present invention, even when the adhesive film is applied to a touch panel, for example, a capacitive touch panel, and directly attached to a conductive layer, the adhesive film effectively prevents the resistance of the conductive layer from being raised and exhibits good heat resistance. In addition, according to the present invention, an adhesive film having superior durability, optical characteristics, cuttability, workability, wettability and resistance to warping is provided.Type: ApplicationFiled: March 14, 2011Publication date: September 13, 2012Applicant: LG HAUSYS, LTDInventors: Jang-Soon Kim, Min-Seok Song, Eok-Hyung Lee, Won-gu Choi, Jae-Gwan Lee, Yong-Hoon Lee, Hak-Rhim Han
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Patent number: 8067475Abstract: Disclosed herein are an adhesive sheet comprising a cured acrylic polymer, hollow polymeric microspheres dispersed and ruptured in the cured acrylic polymer, and hollow parts formed by rupturing the hollow polymeric microspheres dispersed in the cured acrylic polymer, and a preparation method thereof.Type: GrantFiled: June 10, 2005Date of Patent: November 29, 2011Assignee: LG Chem, Ltd.Inventors: Jang Soon Kim, Woo Ha Kim, Jae Gwan Lee, Suk Ky Chang, Wook Kim, Geun Hee Lee, Byoung Soo Lee, Byeong Gyu Cho, Seung Min Yoo
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Publication number: 20110187970Abstract: The present invention relates to an acrylic pressure-sensitive adhesive composition, and more particularly, to an acrylic pressure-sensitive adhesive composition capable of showing an excellent anti-static performance, and solving a transferring problem of additives and a problem concerning a balance of low-rate and high-rate peel strength, by comprising a) an acrylic copolymer including a monomer having a functional group capable of chelating with a metal salt, and a hydrophobic monomer and b) a metal salt.Type: ApplicationFiled: January 13, 2009Publication date: August 4, 2011Applicant: LG CHEM, LTD.Inventors: No Ma Kim, Jae Gwan Lee, An Na Lee
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Publication number: 20110033695Abstract: Provided are a nanocomposite including a layered inorganic material and a random copolymer containing a hydrophobic monomer and a hydrophilic monomer, a polymer composition including the nanocomposite, and a method for preparing the polymer composition. The random copolymer can be prepared at a low cost in a simple process and function as a compatibilizer in small amounts to maintain excellent properties of the nanocomposite including excellent mechanical characteristics such as abrasion resistance, hardness, tensile modulus and tear resistance, excellent thermal characteristics, high liquid and gas permeability, and low flammability.Type: ApplicationFiled: November 20, 2008Publication date: February 10, 2011Applicant: LG Chem, Ltd.Inventors: No Ma Kim, Bong Keun Lee, Suk Ky Chang, Jae Gwan Lee
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Patent number: 7807767Abstract: The present invention provides a method for producing acryl syrup by bulk polymerization, comprising a step of preparing a mixture comprising monomer component and 2,4-diphenyl-4methyl-1-pentene; a step of heating the mixture to the initial reaction temperature; and a step of adding an polymerization initiator having the half-life of not more than 30 minutes at 5-80° C., wherein the initial reaction temperature is controlled so that the polymerization initiator has the half-life of up to 30 minutes. The method of the present invention has such advantages that reaction runaway does not occur, the control of molecular weight and conversion rate is possible even at low exothermic temperature, and a partially polymerized acryl syrup can also be prepared therefrom.Type: GrantFiled: September 17, 2008Date of Patent: October 5, 2010Assignee: LG Chem, Ltd.Inventors: No-ma Kim, Jae-gwan Lee, Suk-ky Chang
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Publication number: 20100209631Abstract: The present invention relates to an acrylic pressure sensitive adhesive composition comprising a monomer containing linear carbonate having an antistatic property. The acrylic pressure sensitive adhesive composition exhibits an excellent balance between low-rate peel strength and high-rate peel strength, and is capable of lowering the content of an antistatic agent. It also provides excellent releasable property, and protection of the surface of a polarizer due to proper wettability.Type: ApplicationFiled: December 9, 2008Publication date: August 19, 2010Inventors: No-Ma Kim, Jae-Gwan Lee, An-Na Lee, Suk-Ky Chang
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Patent number: 7700704Abstract: The present invention provides a method for producing an (meth)acrylate syrup by bulk polymerization which is characterized by: a) using (meth)acrylate ester monomer; and b) using 2,4-diphenyl-4methyl-1-pentenol singly or together with a thiol chain transfer agent as a chain transfer agent, c) initiating polymerization by adding an initiator having the half-life of up to 30 minutes at 55-80° C. of initial reaction temperature, so as to maintain the peak reactor temperature below 95° C. and the reactor conversion rate as 5-50 weight %. The method for producing an (meth)acrylate syrup of the present invention has such advantages that reaction runaway does not occur, the control of molecular weight and conversion rate is possible even at low exothermic temperature without stirring failure, and a partially polymerized (meth)acrylate syrup can also be prepared therefrom.Type: GrantFiled: November 8, 2005Date of Patent: April 20, 2010Assignee: LG Chem, Ltd.Inventors: No-ma Kim, Jae-gwan Lee, Suk-ky Chang
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Publication number: 20090018259Abstract: The present invention provides a method for producing acryl syrup by bulk polymerization, comprising a step of preparing a mixture comprising monomer component and 2,4-diphenyl-4methyl-1-pentene; a step of heating the mixture to the initial reaction temperature; and a step of adding an polymerization initiator having the half-life of not more than 30 minutes at 5-80° C., wherein the initial reaction temperature is controlled so that the polymerization initiator has the half-life of up to 30 minutes. The method of the present invention has such advantages that reaction runaway does not occur, the control of molecular weight and conversion rate is possible even at low exothermic temperature, and a partially polymerized acryl syrup can also be prepared therefrom.Type: ApplicationFiled: September 17, 2008Publication date: January 15, 2009Inventors: No-ma Kim, Jae-gwan Lee, Suk-ky Chang
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Patent number: 7462390Abstract: The present invention provides an acrylic pressure-sensitive adhesive composition for a polarizing film comprising a) 100 parts by weight of a (meth)acrylic copolymer having a high molecular weight, which is copolymerized from a (meth)acrylic acid ester monomer and a vinylic and/or an acrylic monomer having a functional group capable of crosslinking with a multifunctional crosslinking agent and has a weight-average molecular weight of at least 1,000,000; b) 5-20 parts by weight of a (meth)acrylic copolymer having a low molecular weight, which comprises the same monomer of the main chain of a) the (meth)acrylic copolymer having a high molecular weight, has a weight-average molecular weight of 2,000-30,000 and comprises 0.01-1 monomer, per one molecule of the copolymer on average, having a functional group capable of reacting with the crosslinking agent of c); and c) 0.01-10 parts by weight of a multifunctional crosslinking agent.Type: GrantFiled: April 20, 2005Date of Patent: December 9, 2008Assignee: LG Chem, Ltd.Inventors: Se-ra Kim, Suk-ky Chang, Hyun-ju Cho, Jae-gwan Lee, In-cheon Han, Hye-ran Seong
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Publication number: 20070112154Abstract: Disclosed is a method for producing (meth)acrylate syrup, the method comprising initiating polymerization using the following components at a temperature of 50-80° C.: a (meth)acrylate ester monomer, a chain transfer agent, a diacyl peroxide initiator, and 0.5-3.0 moles, based on 1 mole of the diacyl peroxide initiator, of a tertiary amine cocatalyst. In the disclosed method, a reaction runway does not occur even in bulk polymerization, it is easy to control molecular weight and it is possible to form a high-molecular weight (meth)acrylate syrup without stirring failure.Type: ApplicationFiled: September 8, 2005Publication date: May 17, 2007Inventors: Jae-gwan Lee, No-ma Kim, Suk-ky Chang
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Publication number: 20060100407Abstract: The present invention provides a method for producing an (meth)acrylate syrup by bulk polymerization which is characterized by: a) using (meth)acrylate ester monomer; and b) using 2,4-diphenyl-4methyl-1-pentenol singly or together with a thiol chain transfer agent as a chain transfer agent, c) initiating polymerization by adding an initiator having the half-life of up to 30 minutes at 55-80° C. of initial reaction temperature, so as to maintain the peak reactor temperature below 95° C. and the reactor conversion rate as 5-50 weight %. The method for producing an (meth)acrylate syrup of the present invention has such advantages that reaction runaway does not occur, the control of molecular weight and conversion rate is possible even at low exothermic temperature without stirring failure, and a partially polymerized (meth)acrylate syrup can also be prepared therefrom.Type: ApplicationFiled: November 8, 2005Publication date: May 11, 2006Inventors: No-ma Kim, Jae-gwan Lee, Suk-ky Chang