Abstract: The present disclosure relates to an apparatus for preparing an oligomer, the apparatus including: a reactor for oligomerizing a feed stream containing a fed monomer; a stirrer inserted into a hole formed in an upper portion of the reactor; and a solvent transfer line extending inward from a side of the reactor, wherein the stirrer includes a rotating shaft vertically extending downward from the upper portion of the reactor, and a blade having a conical shape whose vertex is positioned at a lower end of the rotating shaft and outer diameter increases from a bottom toward a top, and the solvent transfer line has a plurality of spray nozzles formed in a direction toward the blade.
Type:
Grant
Filed:
November 13, 2020
Date of Patent:
March 26, 2024
Assignee:
LG Chem, Ltd.
Inventors:
Hong Min Lee, Jeong Seok Lee, Jong Hun Song, Kyung Seog Youk, Dong Kwon Lee, Moon Sub Hwang
Abstract: The present disclosure provides a method for decomposing a phenolic by-product, the method including: a step S10 of injecting and mixing a bisphenol A by-product produced in a bisphenol A production process, a mixed by-product stream of phenol by-products produced in a phenol production process, a decomposition apparatus side discharge stream, and a process water stream in a mixing apparatus; a step S20 of injecting a mixing apparatus discharge stream discharged from the mixing apparatus into a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil-phase stream and a liquid-phase stream; a step S30 of feeding the oil-phase stream, which is phase-separated in the step S20 and discharged from the phase separation apparatus, to a decomposition apparatus to decompose the oil-phase stream; and a step S40 of circulating the decomposition apparatus side discharge stream obtained by the decomposition in the step S30 to the mixing apparatus in the step S10.
Type:
Grant
Filed:
August 11, 2020
Date of Patent:
March 26, 2024
Assignee:
LG Chem, Ltd.
Inventors:
Min Suk Kang, Sang Beom Lee, Joon Ho Shin
Abstract: This invention relates to a curable composition for forming high refractive index optical material and optical material comprising the same, and more specifically, to a curable composition for forming high refractive index optical material comprising an episulfide compound and a sulfur-containing polymer compound, and optical material comprising the same.
Abstract: The present disclosure relates to a polyimide-based resin film comprising a polyimide-based resin containing a polyimide repeating unit represented by Chemical Formula 1 and a polyimide repeating unit represented by Chemical Formula 2, a substrate for display device, and an optical device using the same.
Type:
Application
Filed:
September 14, 2022
Publication date:
March 21, 2024
Applicant:
LG CHEM, LTD.
Inventors:
Mi Eun KANG, Chan Hyo PARK, Jinyoung PARK, Chae Won PARK, Min Wook LEE
Abstract: The present invention relates to use of a compound of chemical formula 1 or a pharmaceutically acceptable salt thereof as a selective agonist of the melanocortin-4-receptor (MC4R).
Type:
Application
Filed:
December 21, 2021
Publication date:
March 21, 2024
Applicant:
LG CHEM, LTD.
Inventors:
Hee Dong PARK, Su Jin YEO, Hyun Seo PARK, Jin Sook PARK, Hye Won AHN
Abstract: Provided is an absorbent article exhibiting an improved effect of preventing the body fluid from leaking by including a superabsorbent polymer film having excellent absorbency in three-dimensional gathers.
Type:
Application
Filed:
May 11, 2022
Publication date:
March 21, 2024
Applicant:
LG Chem, Ltd.
Inventors:
Kiyoul Yoon, Myoungjin Shin, Seongkyun Kang, Yu Jin Kim, Gicheul Kim
Abstract: The present invention relates to a diene-based rubber latex including a polymer aggregate and having an extra large diameter, a method for preparing same and a graft copolymer with a core-shell structure, including same and having excellent impact strength and surface properties. A diene-based rubber latex of which 14 wt % to 26 wt % has diameter of 100 nm to less than 300 nm, 62 wt % to 81 wt % has a diameter of 300 nm to less than 800 nm, and 5 wt % to 14 wt % has a diameter of 800 nm to less than 1000 nm, based on 100 wt % of total rubber particles.
Type:
Grant
Filed:
December 17, 2019
Date of Patent:
March 19, 2024
Assignee:
LG CHEM, LTD.
Inventors:
Chang Hong Bak, Young Hwan Jeong, Young Min Kim
Abstract: A method for evaluation of a resin alloy includes identifying and quantifying individual materials contained in the resin alloy. In addition, the method can identify encapsulation and whether or not a single phase is formed, without an additional equipment, allowing easier analysis and evaluation of various alloy materials through evaluation of physical properties of resin alloys.
Abstract: Provided is an organic light-emitting device including: an anode; a cathode provided to face the anode; and organic material layers including a light emitting layer disposed between the anode and the cathode, wherein the light emitting layer, one or more layers of the organic material layers disposed between the anode and the light emitting layer, and one or more layers from among the organic material layers disposed between the cathode and the light emitting layer, each include one or more compounds each composed of sp3 carbon as a center, the light emitting layer includes a host including one or more anthracene-based compounds, and among organic materials included in the organic material layers, the bandgap energy (Ebg) of each of the organic materials except for a dopant compound is 3 eV or more.
Abstract: The present invention provides an adhesive composition for a dicing tape, which may prevent the success rate of chip pick-up from decreasing due to an oxygen inhibition phenomenon occurring in a dicing process, and a dicing tape including the same. The adhesive composition for a dicing tape includes an adhesive binder, a singlet oxygen scavenger, a photosensitizer, and a photoinitiator.
Type:
Grant
Filed:
August 13, 2020
Date of Patent:
March 19, 2024
Assignee:
LG CHEM, LTD.
Inventors:
Da Ae Kim, Ji Ho Han, Kwang Joo Lee, Eun Yeong Kim, Mi Jang
Abstract: An elliptically polarizing plate and an organic light-emitting device. The elliptically polarizing plate has superior visibility and excellent reflection characteristics and color characteristics on the side as well as the front, and an organic light-emitting device comprising the same.
Type:
Grant
Filed:
April 17, 2019
Date of Patent:
March 19, 2024
Assignee:
LG CHEM, LTD.
Inventors:
Sun Kug Kim, Hyuk Yoon, Seongho Ryu, Moon Su Park
Abstract: This specification relates to a decoration member including: a substrate; and a decoration layer provided on the substrate in which there are one or more combinations of viewing angles ? and ? in which a contrast parameter Cn represented by Equation 1 is 0.1 or more.
Type:
Grant
Filed:
June 17, 2019
Date of Patent:
March 19, 2024
Assignee:
LG CHEM, LTD.
Inventors:
Jin Suk Song, Jungdoo Kim, Sangcholl Han, Song Ho Jang, Ki Hwan Kim, Pilsung Jo
Abstract: Provided is a phthalonitrile-based resin, comprising repeat units formed by the reaction of a phthalonitrile compound and a curing agent, wherein the phthalonitrile compound comprises 4,4?-bis(3,4-dicyanophenoxy)diphenyloxide of the following Chemical Formula 1 and 4,4?-bis(3,4-dicyanophenoxy)biphenyl of the following Chemical Formula 2 at a weight ratio of 30:70 to 90:10:
Type:
Grant
Filed:
August 22, 2019
Date of Patent:
March 19, 2024
Assignee:
LG Chem, Ltd.
Inventors:
Seunghee Lee, Sang Woo Kim, Youngdae Kim, Eun Ho Kho
Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. According to the method for preparing superabsorbent polymer of the present invention, superabsorbent polymer having improved rewet property and absorption speed can be provided.
Type:
Grant
Filed:
November 28, 2018
Date of Patent:
March 19, 2024
Assignee:
LG Chem, Ltd.
Inventors:
Young Jae Hur, Dae Woo Nam, Bohee Park, Seongbeom Heo
Abstract: The present disclosure provides a novel compound represented by the following Chemical Formula 1, and an organic light emitting device including the same: wherein A1 to A4, X, Y and n are described herein.
Type:
Application
Filed:
March 8, 2022
Publication date:
March 14, 2024
Applicants:
LG Chem, Ltd., LG Chem, Ltd.
Inventors:
Byeong Yun Lim, Jaechol Lee, Yongwook Kim, Soyoung Yu, Shin Sung Kim, Young Kwang Kim, Hyunju Choi
Abstract: Provided is a positive electrode active material which includes an inner region that is a region from the center of the positive electrode active material particle to R/2; and an outer region that is a region from R/2 to the surface of the positive electrode active material particle, wherein R is a distance from the center of the positive electrode active material particle to the surface thereof. The positive electrode active material further includes 30% to 80% of crystallites A with respect to a total number of crystallites in the outer region of the positive electrode active material, the crystallites A having high crystallite long-axis orientation degree and crystallite c-axis orientation degree. Thus, the positive electrode active material can achieve excellent capacity characteristics and service life characteristics.
Type:
Application
Filed:
March 22, 2022
Publication date:
March 14, 2024
Applicant:
LG Chem, Ltd.
Inventors:
Won Sig Jung, Hwan Young Choi, Jong Pil Kim, Yeo June Yoon, Kang Hyeon Lee, Tae Young Rhee, Yong Jo Jung
Abstract: A graft copolymer, and a graft copolymer composition having excellent particulate dispersibility in a curable resin such as an epoxy resin and is applicable as a particulate impact reinforcing agent, a curable resin composition including same, and methods of preparing them.
Type:
Application
Filed:
August 12, 2022
Publication date:
March 14, 2024
Applicant:
LG Chem, Ltd.
Inventors:
Min Ah Jeong, Ki Hyun Yoo, Sang Hoon Han, Yong Kyun Kim
Abstract: A precursor for a positive electrode active material and a method of making the same are disclosed herein. In some embodiments a method includes forming precursor seeds for a positive electrode active material by a co-precipitation reaction while supplying a transition metal aqueous solution, an ammonium cationic complexing agent, and a basic compound to a reaction solution, and growing precursor particles for a positive electrode active material by a co-precipitation reaction while supplying a transition metal aqueous solution, an ammonium cationic complexing agent, and a basic compound to the reaction solution containing the precursor seeds, wherein the co-precipitation reaction to grow the precursor particles proceeds while continuously increasing feed rates of the transition metal aqueous solution and the ammonium cationic complexing agent.
Type:
Application
Filed:
February 18, 2022
Publication date:
March 14, 2024
Applicant:
LG Chem, Ltd.
Inventors:
Min Joon Lee, Seong Ji Ye, Seung Beom Cho, Jang Soo Lee, Yoon Bin Park
Abstract: The purpose of the present invention is to provide: a crosslinked hyaluronic acid hydrogel in which a crosslinking agent and a polyol are used to reduce toxicity during crosslinking, and thereby enhance safety while increasing persistence in the body; and a filler composition including the crosslinked hyaluronic acid hydrogel.
Abstract: The present disclosure relates to a preparing method of a super absorbent polymer sheet and a super absorbent polymer sheet prepared therefrom. The preparing method of a super absorbent polymer sheet of the present disclosure may prepare a porous flexible super absorbent polymer sheet exhibiting high flexibility and fast absorption rate.
Type:
Application
Filed:
November 20, 2023
Publication date:
March 14, 2024
Applicant:
LG Chem, Ltd.
Inventors:
Kiyoul YOON, Hyeon CHOI, Hyosook JOO, Gicheul KIM, Ju Eun KIM