Patents by Inventor Yong-Yeon Hwang
Yong-Yeon Hwang 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).
-
Publication number: 20240128653Abstract: Disclosed is a meta-structure. The meta-structure includes a lower electrode, a lower insulating layer on the lower electrode, a lower metal oxide layer on the lower insulating layer, a metal layer on the lower metal oxide layer, an upper metal oxide layer on the metal layer, an upper insulating layer on the upper metal oxide layer, and antenna electrodes on the upper insulating layer.Type: ApplicationFiled: June 28, 2023Publication date: April 18, 2024Inventors: Yong Hae KIM, Chi-Sun HWANG, Joo Yeon KIM, Jaehyun MOON, Jong-Heon YANG, Kyunghee CHOI, Ji Hun CHOI
-
Patent number: 11820851Abstract: The present invention relates to a method of preparing a graft copolymer powder, which includes: preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor and carrying out polymerization; preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and preparing a graft copolymer latex in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization; adding an alkyl methacrylate-based polymer to the graft copolymer latex and carrying out coagulation, and more particularly, to a method of preparing a graft copolymer powder that is excellent in weather resistance, fluidity, mechanical properties, surface gloss and appearance quality.Type: GrantFiled: October 10, 2019Date of Patent: November 21, 2023Assignee: LG CHEM, LTD.Inventors: Min Jung Kim, Yong Yeon Hwang, Bong Keun Ahn, Wang Rae Joe, Jang Won Park, Ji Yoon Jeon
-
Publication number: 20230125914Abstract: A display apparatus including a display and a supporter. The supporter being mounted on the display and configured to support the display and rotate the display module between a first position and a second position. The supporter including a drive motor, a first gear, and a detection sensor. The drive motor configured to supply a driving force to rotate the display. The first gear configured to rotate together with the display by receiving the driving force from the drive motor. The detection sensor configured to detect a rotation amount of a second gear configured to rotate in with the first gear.Type: ApplicationFiled: December 23, 2022Publication date: April 27, 2023Applicant: Samsung Electronics Co., Ltd.Inventors: Hyun Yong CHOI, Young Chul KIM, Ji Su KIM, Hun Sung KIM, Sung Yong PARK, Jin Soo SHIN, Dae Sik YOON, Yong Yeon HWANG
-
Patent number: 11582877Abstract: A display apparatus including a display and a supporter. The supporter being mounted on the display and configured to support the display and rotate the display module between a first position and a second position. The supporter including a drive motor, a first gear, and a detection sensor. The drive motor configured to supply a driving force to rotate the display. The first gear configured to rotate together with the display by receiving the driving force from the drive motor. The detection sensor configured to detect a rotation amount of a second gear configured to rotate in with the first gear.Type: GrantFiled: September 27, 2019Date of Patent: February 14, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun Yong Choi, Young Chul Kim, Ji Su Kim, Hun Sung Kim, Sung Yong Park, Jin Soo Shin, Dae Sik Yoon, Yong Yeon Hwang
-
Publication number: 20220403153Abstract: The present disclosure relates to a thermoplastic resin having excellent impact strength, gloss, fluidity, and non-whitening properties and a method of preparing the same. The thermoplastic resin including an alkyl acrylate-alkyl methacrylate graft copolymer (A), or an alkyl acrylate-alkyl methacrylate graft copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, an alkyl methacrylate, and an alkyl acrylate, wherein a total content of the alkyl acrylate is 20 to 50% by weight, and a butyl acrylate coverage value (X) as calculated by Equation 1 below is 50 or more. X={(G?Y)/Y}×100??[Equation 1] In Equation 1, G represents the total gel content (%) of the thermoplastic resin, and Y represents the content (% by weight) of butyl acrylate in the gel of the thermoplastic resin.Type: ApplicationFiled: July 19, 2021Publication date: December 22, 2022Applicant: LG CHEM, LTD.Inventors: Min Jung KIM, Yong Yeon HWANG, Bong Keun AHN, Jangwon PARK, Jiyoon JEON, Eunji LEE, Seyong KIM
-
Patent number: 11525053Abstract: Provided is a thermoplastic resin composition which includes: a graft copolymer including a C4 to C10 alkyl (meth)acrylate-based monomer unit, a styrene-based monomer unit, and a vinyl cyan-based monomer unit; a first styrene-based copolymer including a C1 to C3 alkyl-substituted styrene-based monomer unit and a vinyl cyan-based monomer unit; and a second styrene-based copolymer including an unsubstituted styrene-based monomer unit and a vinyl cyan-based monomer unit. The thermoplastic resin composition is remarkably excellent in heat resistance, chemical resistance, and appearance characteristics while maintaining basic properties.Type: GrantFiled: October 29, 2019Date of Patent: December 13, 2022Assignee: LG CHEM, LTD.Inventors: Da Eun Sung, Yong Yeon Hwang, Chun Ho Park, Yong Hee An, Jeong Min Jang
-
Publication number: 20220372269Abstract: The present disclosure relates to a thermoplastic resin having excellent non-whitening properties, impact strength, gloss, and fluidity, and a method of preparing the thermoplastic resin. The thermoplastic resin includes an alkyl acrylate-alkyl methacrylate graft copolymer (A), or the copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound-vinyl cyanide compound-alkyl methacrylate copolymer and an alkyl methacrylate polymer. A transparency measured under a condition of 3 mm thickness is less than 5, the total content of the alkyl acrylate is 20 to 50% by weight, and an alkyl acrylate coverage value (X) as calculated by Equation 1 below is 65 or more: X={(G?Y)/Y}×100,??[Equation 1] wherein G represents the total gel content (%) of the thermoplastic resin, and Y represents the content of alkyl acrylate in the gel contained in the thermoplastic resin.Type: ApplicationFiled: July 19, 2021Publication date: November 24, 2022Applicant: LG CHEM, LTD.Inventors: Jiyoon JEON, Yong Yeon HWANG, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Eunji LEE, Seyong KIM
-
Patent number: 11499046Abstract: Provided is a thermoplastic resin composition which includes: a graft copolymer prepared by graft-polymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer having an average particle diameter of 50.0 to 90.0 nm; a matrix copolymer including a C1-C3 alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit; and an additive including a polymer including a C1-C3 alkyl (meth)acrylate-based monomer unit, specifically, a thermoplastic resin composition which has improved properties in terms of elongation, processability, weather resistance, colorability, hardness, chemical resistance, scratch resistance, a whitening phenomenon, surface gloss and appearance quality while having excellent basic properties.Type: GrantFiled: November 13, 2019Date of Patent: November 15, 2022Assignee: LG CHEM, LTD.Inventors: Chun Ho Park, Yong Yeon Hwang, Da Eun Sung, Yong Hee An, Jeong Min Jang
-
Publication number: 20220356340Abstract: Disclosed is a thermoplastic resin including an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A), or an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, an alkyl methacrylate, and an alkyl acrylate, wherein the total content of the alkyl acrylate is 20 to 50% by weight, and an alkyl acrylate coverage value (X) as calculated by Equation 1 below is 65 or more: X={(G?Y)/Y}×100, ??[Equation 1] wherein G represents the total gel content (%) of the thermoplastic resin, and Y represents the content (% by weight) of the alkyl acrylate in the gel of the thermoplastic resin.Type: ApplicationFiled: December 10, 2020Publication date: November 10, 2022Applicant: LG CHEM, LTD.Inventors: Jangwon PARK, Yong Yeon HWANG, Bong Keun AHN, Min Jung KIM, Jiyoon JEON, Eunji LEE, Seyong KIM
-
Patent number: 11492437Abstract: The present invention relates to a method of preparing an ASA graft copolymer, a method of preparing a thermoplastic resin composition including the ASA graft copolymer, and a method of manufacturing a molded article using the thermoplastic resin composition.Type: GrantFiled: January 12, 2018Date of Patent: November 8, 2022Assignee: LG CHEM, LTD.Inventors: Min Jung Kim, Yong Yeon Hwang, Hyun Taek Oh, Bong Keun Ahn, Chun Ho Park, Eun Soo Kang, Yong Hee An, Jang Won Park
-
Publication number: 20220348761Abstract: The present disclosure relates to a thermoplastic resin having excellent non-whitening properties, impact strength, gloss, and fluidity, and a method of preparing the thermoplastic resin. The thermoplastic resin includes an alkyl acrylate-alkyl methacrylate graft copolymer (A), or the copolymer (A) and a matrix resin (B) including an alkyl methacrylate polymer and/or an alkyl methacrylate-alkyl acrylate copolymer. A transparency of the thermoplastic resin having a thickness of 0.15 mm is less than 2, a total content of the alkyl acrylate in the thermoplastic resin is 20 to 50% by weight, and a butyl acrylate coverage value (X) as calculated by Equation 1 below is 50 or more: X={(G?Y)/Y}×100,??[Equation 1] wherein G represents a total gel content (%) of the thermoplastic resin, and Y represents a content (% by weight) of butyl acrylate in the gel of the thermoplastic resin.Type: ApplicationFiled: July 19, 2021Publication date: November 3, 2022Applicant: LG CHEM, LTD.Inventors: Eunji LEE, Yong Yeon HWANG, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Jiyoon JEON, Seyong KIM
-
Patent number: 11459457Abstract: Provided is a thermoplastic resin composition which includes: a base resin including a polyarylene oxide-based polymer at 100 parts by weight; and an additive including one or more selected from the group consisting of compounds represented by Chemical Formula 1-1 to Chemical Formula 1-3 at 0.1 to 5 parts by weight, and can be used for producing a thermoplastic resin molded article which exhibits an excellent coloring property and thus has an aesthetically pleasing appearance.Type: GrantFiled: April 5, 2019Date of Patent: October 4, 2022Assignee: LG CHEM, LTD.Inventors: Je Sun Yoo, Ki Young Nam, Yong Yeon Hwang, Jae Yong Sim, Seon Hyeong Bae, Jae Yeon Bae, In Seok Kim
-
Patent number: 11401409Abstract: The present invention relates to a thermoplastic resin composition, including a first graft copolymer including an alkyl (meth)acrylate-based polymer-derived unit, an aromatic vinyl-based monomer-derived unit, and a vinyl cyanide-based monomer-derived unit; a copolymer including an aromatic vinyl-based monomer-derived unit and a vinyl cyanide-based monomer-derived unit; a polyester-based elastomer; and a phthalate-based plasticizer.Type: GrantFiled: October 30, 2018Date of Patent: August 2, 2022Assignee: LG CHEM, LTD.Inventors: Yong Hee An, Yong Yeon Hwang, Chun Ho Park, Jang Won Park
-
Patent number: 11384189Abstract: The present invention provides a graft copolymer comprising (A) a seed comprising units derived from an alkyl methacrylate monomer; (B) a core formed on the seed and comprising units derived from an alkyl acrylate monomer; and (C) a shell formed on the core and comprising units derived from one or more one or more selected from the group consisting of an aromatic vinyl-based monomer, a vinyl cyanide-based monomer and an alkyl methacrylate monomer, wherein an average particle diameter of the core is 40 to 90 nm, and a graft ratio of the shell is 10 to 30%, and a thermoplastic resin composition and a thermoplastic resin molded article including the same.Type: GrantFiled: September 12, 2018Date of Patent: July 12, 2022Assignee: LG CHEM, LTD.Inventors: Min Jung Kim, Bong Keun Ahn, Yong Yeon Hwang, Wang Rae Joe, Jang Won Park
-
Patent number: 11377547Abstract: Provided is a thermoplastic resin composition which includes: a graft copolymer prepared by graft-polymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer; a first matrix copolymer including a C1-C3 alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit; a second matrix copolymer including a C1-C3 alkyl (meth)acrylate-based monomer unit, an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit; and an additive including a polymer including a C1-C3 alkyl (meth)acrylate-based monomer unit, wherein the first matrix copolymer and the second matrix copolymer have different weight-average molecular weights, specifically, a thermoplastic resin composition which allows high gloss, high hardness, high weather resistance and reduced whitening to be realized.Type: GrantFiled: November 12, 2019Date of Patent: July 5, 2022Assignee: LG CHEM, LTD.Inventors: Chun Ho Park, Yong Yeon Hwang, Da Eun Sung, Yong Hee An, Jeong Min Jang
-
Patent number: 11377515Abstract: A method for preparing a graft copolymer includes the steps of: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and carrying out polymerization; 2) preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and 3) preparing a shell in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization, wherein an activator including a compound represented by Chemical Formula 1 is added in the step 3). In Chemical Formula 1, R1 and R2 are each independently hydrogen, a C1-C10 alkyl group, or *-(C=O)OM2, provided that R1 and R2 are not both hydrogen, and M1 and M2 are each independently an alkali metal.Type: GrantFiled: August 28, 2019Date of Patent: July 5, 2022Assignee: LG CHEM, LTD.Inventors: Bong Keun Ahn, Min Jung Kim, Wang Rae Joe, Yong Yeon Hwang, Jang Won Park, Ji Yoon Jeon
-
Patent number: 11326050Abstract: Provided are a method of preparing a graft copolymer, a graft copolymer, and a thermoplastic resin molded article including the graft copolymer, the method including: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and performing polymerization; 2) in the presence of the seed, preparing a core by adding an alkyl (meth)acrylate-based monomer and performing polymerization; and 3) in the presence of the core, preparing a shell by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and performing polymerization, wherein the method further includes adding an alkyl acrylate-based polymer. When the alkyl acrylate-based polymer is included in a graft copolymer, a graft copolymer and a thermoplastic resin molded article excellent in weather resistance, fluidity, mechanical properties, and appearance quality can be provided.Type: GrantFiled: August 5, 2019Date of Patent: May 10, 2022Assignee: LG CHEM, LTD.Inventors: Bong Keun Ahn, Min Jung Kim, Jang Won Park, Yong Yeon Hwang, Wang Rae Joe, Ji Yoon Jeon
-
Patent number: 11286383Abstract: Provided is a thermoplastic resin composition which includes: a first graft copolymer including a C4 to C10 alkyl (meth)acrylate-based monomer unit, a C1 to C3 alkyl-substituted styrene-based monomer unit, and a vinyl cyan-based monomer unit; a second graft copolymer including a C4 to C10 alkyl (meth)acrylate-based monomer unit, an alkyl-unsubstituted styrene-based monomer unit, and a vinyl cyan-based monomer unit; a first styrene-based copolymer including a C1 to C3 alkyl-substituted styrene-based monomer unit and a vinyl cyan-based monomer unit; a second styrene-based copolymer including an alkyl-unsubstituted styrene-based monomer unit and a vinyl cyan-based monomer unit; and an olefin-based copolymer including a C1 to C3 alkyl (meth)acrylate-based monomer unit. The thermoplastic resin composition exhibits remarkably excellent chemical resistance and remarkably excellent appearance characteristics while maintaining basic properties.Type: GrantFiled: October 28, 2019Date of Patent: March 29, 2022Assignee: LG CHEM, LTD.Inventors: Da Eun Sung, Yong Yeon Hwang, Chun Ho Park, Yong Hee An, Jeong Min Jang
-
Publication number: 20220073723Abstract: The present invention relates to an acrylic graft copolymer, a method of preparing the same, and a thermoplastic resin composition including the same. More specifically, the acrylic graft copolymer of the present invention includes a seed, a core, and a graft shell. In this case, the graft shell includes 0.05 to 2 parts by weight of a reactive ultraviolet stabilizer based on 100 parts by weight of the acrylic graft copolymer, and the graft shell has an average particle diameter of 80 to 140 nm (greater than the average particle diameter of the core). The acrylic graft copolymer of the present invention has excellent impact strength, tensile strength, weather resistance, and surface gloss. In addition, when the acrylic graft copolymer is used, mold deposits may be reduced.Type: ApplicationFiled: September 11, 2020Publication date: March 10, 2022Inventors: Bong Keun AHN, Yong Yeon HWANG, Min Jung KIM, Jang Won PARK, Jiyoon JEON, Eunji LEE, Seyong KIM
-
Publication number: 20220056183Abstract: The present invention relates to a thermoplastic resin composition including a (meth)acrylate graft copolymer and a method of preparing the thermoplastic resin composition. According to the present invention, the thermoplastic resin composition includes a graft copolymer (A) containing an alkyl acrylate rubber core and an alkyl methacrylate compound (co)polymer shell surrounding the alkyl acrylate rubber core; and a matrix resin (B). In this case, the rubber core has an average particle diameter of 40 to 100 nm, the graft copolymer (A) has a grafting degree of 20 to 100%, and the thermoplastic resin composition has a refractive index of greater than 1.46 and less than 1.49 and a blackness (L value) of less than 25.0.Type: ApplicationFiled: August 10, 2020Publication date: February 24, 2022Inventors: Min Jung KIM, Yong Yeon HWANG, Bong Keun AHN, Jang Won PARK, Seyong KIM, Jiyoon JEON