公开(公告)号：US20190330423A1

公开(公告)日：2019-10-31

申请号：US16065720

申请日：2017-10-30

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Kyoung Shil OH ,  Je Kyun LEE

IPC: C08G77/02

Abstract: The present invention relates to a two-step synthesis method of a pre-hydrolyzed alkyl polysilicate. In the method, a silica precursor hydrated to 90 to 100% is added to maximize a condensation reaction rate, and a silica precursor hydrated to 25 to 70% is additionally added to terminate a condensation reaction, so that a condensation reaction time may be remarkably shortened relative to a conventional one-step synthesis method and may be shortened even without the use of a condensation catalyst, so that the catalyst purchase cost and the catalyst separation step in the process may not be required, thus having a simple process and reducing the production cost. Also, the amount and time point of the silica precursor additionally added may be controlled, thereby easily controlling the gelation reaction time and the weight average molecular weight, and synthesizing the pre-hydrolyzed alkyl polysilicate excellent in storage stability and processabilty.

公开(公告)号：US20240166525A1

公开(公告)日：2024-05-23

申请号：US18282055

申请日：2022-06-07

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Kyoung Shil OH

IPC: C01B33/154 ,  C01B33/158

CPC classification number: C01B33/154 ,  C01B33/1585

Abstract: Provided is a method for producing silica aerogel using a pre-hydrolyzed polysilicate, the method comprising: applying a polysilicate as a reactant when synthesizing of the pre-hydrolyzed polysilicate; and hydrating the polysilicate in the presence of an alcohol-based compound, which is generated through the hydration of a compound of Formula 1 without the addition of a separate alcohol-based solvent:


R1—Si(OR2)3  [Formula 1]

wherein R1 is an alkyl having 1 to 20 carbon atoms, a cycloalkyl having 3 to 20 carbon atoms, or a vinyl having 1 to 20 carbon atoms, and each R2 is independently an alkyl having 1 to 20 carbon atoms.

公开(公告)号：US20230287019A1

公开(公告)日：2023-09-14

申请号：US18018092

申请日：2021-07-30

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Se Won BAEK

IPC: C07F7/18

CPC classification number: C07F7/188

Abstract: Provided is a method of manufacturing an alkoxysilane compound that is capable of more effectively removing ammonia generated as a by-product when the alkoxysilane compound is manufactured using a silazane-based compound, the method including adding an alcohol to a silazane-based compound of Formula 1:




and allowing the alcohol to react with the silazane-based compound to prepare a first mixture comprising an alkoxysilane compound and ammonia; adding an alcohol and a compound of Formula 2:


(R1)n(R2)3-nSi—X

to the first mixture and allowing the alcohol and the compound of Formula 2 to react with the first mixture to prepare a second mixture in which an additional alkoxysilane compound and an ammonium salt are generated; adding an aqueous solvent to the second mixture to dissolve the ammonium salt; and separating and removing the ammonium salt.

公开(公告)号：US20230227479A1

公开(公告)日：2023-07-20

申请号：US18018327

申请日：2021-07-30

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Se Won BAEK

IPC: C07F7/18

CPC classification number: C07F7/188

Abstract: Provided is a method of manufacturing an alkoxysilane compound, the method capable of more effectively removing ammonia generated as a byproduct when the alkoxysilane compound is manufactured with a silazane-based compound by adding and reacting a silazane-based compound. The method includes: adding an alcohol to a silazane-based compound and allowing the alcohol to react with the silazane-based compound to manufacture a first mixture containing an alkoxysilane compound and ammonia; adding an acid having a pKa of 2-6.5 to the first mixture to prepare a second mixture containing the alkoxysilane compound and an ammonium salt; adding an aqueous solvent to the second mixture to dissolve the ammonium salt; and separating and removing the ammonium salt.

公开(公告)号：US20220098046A1

公开(公告)日：2022-03-31

申请号：US17425457

申请日：2020-09-28

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Se Won BAEK ,  Hyun Woo JEON ,  Mi Ri KIM ,  Sung Min YU ,  Sang Woo PARK ,  Bong June KIM

IPC: C01B33/159 ,  C01B33/158 ,  C01B33/145

Abstract: Provided is a silica sol, a silica aerogel blanket using the same, and a method for manufacturing the same, wherein a hydrophobizing agent, a base catalyst, an organic solvent, and water are included in a catalyst composition when manufacturing the silica aerogel blanket, so that a wet aging step which is performed under high-temperature conditions and increases the amount of a solvent used, and a surface modification step which uses a large amount of an organic solvent and an expensive surface modifier, resulting in a process that is complex and long and thus inhibiting economic feasibility and productivity, can be omitted.

公开(公告)号：US20210114887A1

公开(公告)日：2021-04-22

申请号：US16762675

申请日：2018-09-19

Applicant: LG CHEM, LTD.

Inventor： Myung Eun OH ,  Kyu Reon LEE ,  Je Kyun LEE

IPC: C01B33/158 ,  C04B28/26 ,  C01B33/159 ,  C09D7/61

Abstract: Provided is a silica aerogel blanket capable of preventing deterioration of heat insulating performance while reducing dust generation, and method for manufacturing the same. The method manufactures a low-dust silica aerogel blanket by separately adding a silica sol to prevent an opacifying agent from being exposed to the surface of the silica aerogel blanket.

公开(公告)号：US20240199812A1

公开(公告)日：2024-06-20

申请号：US18281740

申请日：2022-06-07

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Kyoung Shil OH

IPC: C08G77/02

CPC classification number: C08G77/02

Abstract: Provided is a method for preparing a prehydrolyzed polysilicate in which a polysilicate is applied as a reactant during synthesizing a prehydrolyzed polysilicate, and the polysilicate is hydrated in the presence of an alcohol-based compound formed through the hydration of a compound of Formula 1 without the injection of a separate alcohol-based solvent:


R1—Si—(OR2)3   [Formula 1]

wherein: R1 is an alkyl of 1 to 20 carbon atoms, cycloalkyl of 3 to 20 carbon atoms, or vinyl of 1 to 20 carbon atoms; and each R2 is independently an alkyl of 1 to 20 carbon atoms.

公开(公告)号：US20220250922A1

公开(公告)日：2022-08-11

申请号：US17427018

申请日：2020-09-28

Applicant: LG CHEM, LTD.

Inventor： Hyun Woo JEON ,  Se Won BAEK ,  Kyu Reon LEE ,  Mi Ri KIM

IPC: C01B33/158 ,  F16L59/02

Abstract: The present invention relates to an aerogel blanket including an aerogel structure and a substrate for a blanket, wherein the aerogel structure includes a three-dimensional network structure formed by a plurality of aerogel particles aggregated or bonded, and an average aerogel structure size (D50) measured by spraying 10 ml of dry powder of the aerogel structure with air at a pressure of 15 psi, and using laser diffraction of 780 nm wavelength is 5 μm to 10 μm.

公开(公告)号：US20210206923A1

公开(公告)日：2021-07-08

申请号：US17057292

申请日：2019-11-27

Applicant: LG CHEM, LTD.

Inventor： Kyu Reon LEE ,  Kyoung Shil OH ,  Jong Hun KIM ,  Se Won BAEK

IPC: C08G77/02 ,  C08J9/28 ,  C08J3/075 ,  C01B33/158 ,  C01B33/143

Abstract: A method for synthesizing a pre-hydrolyzed polysilicate, wherein a polysilicate is applied as a reactant when synthesizing the pre-hydrolyzed polysilicate, and the total amount of water added in the reaction system is specified. The method is capable of omitting a condensation reaction by applying a polysilicate as a reactant, thereby significantly shortening synthesis time and reducing production costs when compared with a typical synthesis method in which alkoxysilane-based monomer compound is used as a reactant. In addition, the gelation reaction time and the weight average molecular weight can be easily controlled, and a pre-hydrolyzed polysilicate excellent in storage stability and processability can be synthesized.

公开(公告)号：US20210198112A1

公开(公告)日：2021-07-01

申请号：US17057251

申请日：2019-12-13

Applicant: LG CHEM, LTD.

Inventor： Myung Eun OH ,  Se Won BAEK ,  Kyu Reon LEE

IPC: C01B33/158 ,  B01J13/00 ,  C01B33/143

Abstract: Provided is a method for manufacturing an aerogel blanket having improved processability by reducing manufacturing time and cost, the method including the steps of mixing a precursor material, an acid catalyst and a hydrous alcohol to prepare a sol, depositing a substrate in the sol, and reacting with a gaseous silazane-based compound to form a gel and to perform aging and surface modification reaction simultaneously to form a wet gel blanket, and drying the wet gel blanket to manufacture an aerogel blanket.