Patents by Inventor Jeong Sik Bae

Jeong Sik Bae 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).

  • Patent number: 10829668
    Abstract: The present application relates to a pressure-sensitive adhesive composition, a protective film, an optical element and a display device. The pressure-sensitive adhesive composition of the present application has excellent storage stability, exhibits an appropriate low-speed and high-speed peel forces after the cross-linked structure is formed, and has excellent balance of both. Furthermore, the pressure-sensitive adhesive formed by the pressure-sensitive adhesive composition does not leave contaminants in the adherend after peeling, while exhibiting re-detachability. Accordingly, when the pressure-sensitive adhesive composition is applied to, for example, a protective film, it is also advantageous in terms of high-speed processes by being easily peeled off upon high-speed peeling as well as it exhibits an excellent protective effect, thereby being capable of exhibiting excellent antistatic characteristics.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: November 10, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Sang Ha Son, Jeong Sik Bae, Jeong Ae Yoon, Sung Soo Yoon
  • Publication number: 20200123423
    Abstract: The present application relates to a pressure-sensitive adhesive composition, a protective film, an optical element and a display device. The pressure-sensitive adhesive composition of the present application has excellent storage stability, exhibits an appropriate low-speed and high-speed peel forces after the cross-linked structure is formed, and has excellent balance of both. Furthermore, the pressure-sensitive adhesive formed by the pressure-sensitive adhesive composition does not leave contaminants in the adherend after peeling, while exhibiting re-detachability. Accordingly, when the pressure-sensitive adhesive composition is applied to, for example, a protective film, it is also advantageous in terms of high-speed processes by being easily peeled off upon high-speed peeling as well as it exhibits an excellent protective effect, thereby being capable of exhibiting excellent antistatic characteristics.
    Type: Application
    Filed: December 7, 2016
    Publication date: April 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sang Ha SON, Jeong Sik BAE, Jeong Ae YOON, Sung Soo YOON
  • Patent number: 10308751
    Abstract: A block copolymer, a method for preparing a block copolymer, a resin composition, and a film are provided. The block copolymer can be useful in inhibiting complete separation of the hard segment even under a severe high-temperature condition by increasing the chemical cross-linking density around the hard segment without causing an increase in glass transition temperature of the hard segment, thereby maintaining high-temperature durability.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: June 4, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Jeong Ae Yoon, Su Jeong Kim, Sung Soo Yoon, Min Ki Lee, Kee Young Kim, Han Na Chi, Sang Hyun Hong, Jeong Sik Bae
  • Patent number: 10131820
    Abstract: The present invention relates to a pressure-sensitive adhesive composition, a protective film, an optical element, and a display device. A pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to the present invention can have proper high-speed and low-speed peel strengths and simultaneously can exhibit an excellent balance between the high-speed and low-speed peel strengths. The pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention exhibits a proper level of surface resistance and excellent electrostatic discharge characteristics, and has no contaminants with respect to an adherend even when the pressure-sensitive adhesive sheet is peeled from the adherend after the pressure-sensitive adhesive sheet is attached to the adherend for a long period of time.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: November 20, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Sang Ha Son, Sung Soo Yoon, Kee Young Kim, Jeong Sik Bae
  • Patent number: 10066130
    Abstract: A pressure-sensitive adhesive composition, a protective film, an optical element and a display device are provided. The pressure-sensitive adhesive composition has excellent storage stability, exhibits proper low-speed and high-speed peel strengths after formation of a cross-linked structure, and also has an excellent balance between the low-speed and high-speed peel strengths. Therefore, when the pressure-sensitive adhesive composition is applied to a protective film, the pressure-sensitive adhesive composition can have an excellent protective effect, and can also be advantageous to perform a high-speed process since the pressure-sensitive adhesive composition is easily peeled during a high-speed peeling process. In the high-speed peeling process, the pressure-sensitive adhesive composition can exhibit excellent antistatic characteristics.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: September 4, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Kee Young Kim, Sung Soo Yoon, Jeong Sik Bae
  • Patent number: 10066133
    Abstract: Provided are a pressure-sensitive adhesive composition, a protective film, an optical device, and a display device. The pressure-sensitive adhesive composition may exhibit excellent storage stability, suitable low speed and high speed peel-off strengths after forming a crosslinking structure, and have an excellent balance between them. Accordingly, the pressure-sensitive adhesive composition may exhibit an excellent protective effect when applied to a protective film, may be easily peeled in a high speed peel-off and thus advantageous for a high speed process, and may exhibit an excellent antistatic characteristic.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: September 4, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Jeong Sik Bae, Sung Soo Yoon, Kee Young Kim
  • Publication number: 20170260423
    Abstract: The present invention relates to a pressure-sensitive adhesive composition, a protective film, an optical element, and a display device. A pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to the present invention can have proper high-speed and low-speed peel strengths and simultaneously can exhibit an excellent balance between the high-speed and low-speed peel strengths. The pressure-sensitive adhesive sheet formed using the pressure-sensitive adhesive composition according to one exemplary embodiment of the present invention exhibits a proper level of surface resistance and excellent electrostatic discharge characteristics, and has no contaminants with respect to an adherend even when the pressure-sensitive adhesive sheet is peeled from the adherend after the pressure-sensitive adhesive sheet is attached to the adherend for a long period of time.
    Type: Application
    Filed: August 3, 2015
    Publication date: September 14, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Sang Ha Son, Sung Soo Yoon, Kee Young Kim, Jeong Sik Bae
  • Publication number: 20160376480
    Abstract: Provided are a pressure-sensitive adhesive composition, a protective film, an optical device, and a display device. The pressure-sensitive adhesive composition may exhibit excellent storage stability, suitable low speed and high speed peel-off strengths after forming a crosslinking structure, and have an excellent balance between them. Accordingly, the pressure-sensitive adhesive composition may exhibit an excellent protective effect when applied to a protective film, may be easily peeled in a high speed peel-off and thus advantageous for a high speed process, and may exhibit an excellent antistatic characteristic.
    Type: Application
    Filed: June 19, 2014
    Publication date: December 29, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Jeong Sik Bae, Sung Soo Yoon, Kee Young Kim
  • Publication number: 20160208039
    Abstract: A block copolymer, a method for preparing a block copolymer, a resin composition, and a film are provided. The block copolymer can be useful in inhibiting complete separation of the hard segment even under a severe high-temperature condition by increasing the chemical cross-linking density around the hard segment without causing an increase in glass transition temperature of the hard segment, thereby maintaining high-temperature durability.
    Type: Application
    Filed: September 1, 2014
    Publication date: July 21, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Jeong Ae Yoon, Su Jeong Kim, Sung Soo Yoon, Min Ki Lee, Kee Young Kim, Han Na Chi, Sang Hyun Hong, Jeong Sik Bae
  • Publication number: 20150093533
    Abstract: A pressure-sensitive adhesive composition, a protective film, an optical element and a display device are provided. The pressure-sensitive adhesive composition has excellent storage stability, exhibits proper low-speed and high-speed peel strengths after formation of a cross-linked structure, and also has an excellent balance between the low-speed and high-speed peel strengths. Therefore, when the pressure-sensitive adhesive composition is applied to a protective film, the pressure-sensitive adhesive composition can have an excellent protective effect, and can also be advantageous to perform a high-speed process since the pressure-sensitive adhesive composition is easily peeled during a high-speed peeling process. In the high-speed peeling process, the pressure-sensitive adhesive composition can exhibit excellent antistatic characteristics.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 2, 2015
    Inventors: Kee Young Kim, Sung Soo Yoon, Jeong Sik Bae