Dianhydride analysis method
    2.
    发明授权

    公开(公告)号:US11639917B2

    公开(公告)日:2023-05-02

    申请号:US16959489

    申请日:2019-09-23

    申请人: LG Chem, Ltd.

    摘要: The present invention relates to a dianhydride analysis method, which can reliably analyze a dianhydride having high reactivity and low solubility. In addition, the present invention can analyze the structure of impurities by separating the impurities on the basis of having a similar retention time in HPLC analysis, and can analyze the purity of the dianhydride with or without chromophores.

    METHOD FOR PRODUCING ACRYLIC ACID

    公开(公告)号:US20230131529A1

    公开(公告)日:2023-04-27

    申请号:US17920861

    申请日:2021-10-27

    申请人: LG CHEM, LTD.

    IPC分类号: C07C51/377 C07C51/44

    摘要: Provided is a method for producing acrylic acid, the method including: preparing a reaction product containing acrylic acid by supplying lactic acid to a reactor and performing a dehydration reaction; supplying a reactor discharge stream containing the reaction product to a cooling tower and condensing the result to transfer a lower discharge stream including a condensate to an acrylic acid purification unit and supplying a non-condensate discharged as an upper discharge stream to a distillation tower; and, in the distillation tower, circulating the lower discharge stream containing acrylic acid to the cooling tower, and removing acetaldehyde from the upper discharge stream.

    Method for preparing organic electronic device

    公开(公告)号:US11638382B2

    公开(公告)日:2023-04-25

    申请号:US16467814

    申请日:2017-12-11

    申请人: LG CHEM, LTD.

    IPC分类号: G03F7/028

    摘要: The present application relates to a method for preparing an organic electronic device, and the organic electronic device prepared by the same, the method for preparing an organic electronic device can improve flatness and adhesion of an organic layer in a process of sealing an organic electronic element to effectively block moisture or oxygen from the outside, thereby securing the lifetime of the organic electronic device.

    Optical device
    6.
    发明授权

    公开(公告)号:US11635650B2

    公开(公告)日:2023-04-25

    申请号:US17426891

    申请日:2020-01-14

    申请人: LG Chem, Ltd.

    摘要: An optical device is disclosed herein. In some embodiments, an optical device includes a first base film and a second base film, a light modulation layer existing between the first and second base films, electrode layers formed on surfaces of the first and second base films that face the light modulation layer, wherein each electrode layer comprises a first region capable of applying an electric field to the light modulation layer, and a second region connecting the electrode layer to an external power source, wherein the second region on the first base film and the second region on the second base film face each other, and an insulating layer disposed between the facing second regions of the first and second base films. The optical device is capable of preventing defects such as short circuits even when an external power source has been connected in an encapsulated structure.

    System and method for diagnosing relay fault

    公开(公告)号:US11635466B2

    公开(公告)日:2023-04-25

    申请号:US16631626

    申请日:2018-11-20

    申请人: LG Chem, Ltd.

    发明人: You Seob Gil

    摘要: A relay abnormality diagnosis system and method capable of diagnosing an abnormality of a relay by directly connecting a diagnosis resistor to a current measurement unit and by using a current input to the current measurement unit from the diagnosis resistor and a current flowing on an electric circuit measured by the current measurement unit, in the relay abnormality diagnosis system that diagnoses the abnormality of the relay using the diagnosis resistor.

    Super absorbent polymer and method for producing same

    公开(公告)号:US11633720B2

    公开(公告)日:2023-04-25

    申请号:US17201484

    申请日:2021-03-15

    申请人: LG Chem, Ltd.

    摘要: The super absorbent polymer comprises: a base polymer powder including a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the super absorbent polymer has: a fixed height absorption (FHA) of 22.5 g/g to 29 g/g, a saline flow conductivity (SFC) of 35 (·10−7 cm3·s/g) or more, and T-20 of 180 seconds or less.

    Method For Preparing Super Absorbent Polymer

    公开(公告)号:US20230124243A1

    公开(公告)日:2023-04-20

    申请号:US17909901

    申请日:2021-12-23

    申请人: LG Chem, Ltd.

    摘要: The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer capable of improving drying efficiency, reducing a generation amount of refines, and simultaneously improving absorption performance, in particular, absorbing under pressure and permeability of the finally prepared super absorbent polymer by controlling granulation strength of the extruded fine reassembly.

    Electrode Mixture Manufacturing Method And Electrode Mixture

    公开(公告)号:US20230123951A1

    公开(公告)日:2023-04-20

    申请号:US18085025

    申请日:2022-12-20

    申请人: LG Chem, Ltd.

    摘要: The present invention provides: an electrode mixture manufacturing method comprising the processes of introducing a first binder, an electrode active material, and a conductive material into an extruder, performing a first mixing of the first binder, the electrode active material, and the conductive material in the extruder, additionally introducing a second binder into the extruder and performing a second mixing, and yielding an electrode mixture resulting from the first mixing and the second mixing; an electrode mixture manufactured thereby; and an electrode manufacturing method using the electrode mixture.