Abstract: Disclosed is a method for preparing a wet master batch elastomer composition, comprising a first step of feeding silica particles and an organic silane coupling agent into an SSBR polymer solution; and a second step of grinding the silica particles, while stirring the SSBR polymer solution into which the silica particles and the organic silane coupling agent are fed, wherein a ratio of an average particle size of the ground silica particles to an average particle size of the silica particles is less than or equal to 0.8, and wherein the wet master batch elastomer composition has a bound rubber content of 30 to 80 wt. %.
Type:
Application
Filed:
January 11, 2023
Publication date:
April 18, 2024
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Jae Young KO, Eunjoo KIM, Seung Hyun KIM, Kyeongjun CHO
Abstract: A preparation process of 5-ethylidene-2-norbornene, including: introducing dicyclopentadiene into a dicyclopentadiene decomposition reactor to thermally decompose the dicyclopentadiene; introducing a product of the above step into a cyclopentadiene purification tower; introducing 1,3-butadiene, a solvent, and cyclopentadiene separated from the top of the cyclopentadiene purification tower into a Diels-Alder reactor to react the same; introducing a product of the immediate above step into a 1,3-butadiene removal tower to recover 1,3-butadiene from the top; introducing a mixture at the bottom of the 1,3-butadiene removal tower into a desolvation tower, and recycling a solvent and unreacted raw materials recovered from the top of the desolvation tower to the dicyclopentadiene decomposition reactor; introducing a mixture at the bottom of the desolvation tower into a 5-vinyl-2-norbornene separation tower to separate 5-vinyl-2-norbornene; and introducing the 5-vinyl-2-norbornene into an isomerization reactor to rea
Type:
Application
Filed:
May 26, 2023
Publication date:
March 7, 2024
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Young Rok LEE, Jae Woom KIM, Kyoung Ho ROW, Ick Jin AN, Jin Woo PARK, Yu Mi KIM
Abstract: Provided are a polymer polyol dispersion stabilizer, which is prepared by reacting a first polyol having a hydroxyl value (OHV) of 5 to 50 mgKOH/g and an ethylene oxide content of less than 20 wt %, a second polyol having an OHV of 50 to 100 mgKOH/g and an ethylene oxide content of 20 wt % or more, and a reactive unsaturated compound having one or more carbon-carbon double bonds and two or more carbon-oxygen double bonds, and a method of preparing the same.
Type:
Application
Filed:
June 8, 2023
Publication date:
February 1, 2024
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Jinwoo PARK, Gi Jung KIM, Seulgi KIM, Jae Yeong SONG
Abstract: Proposed is a rubber composition for a tire tread, which includes: a solution-polymerized elastomer having a conjugated diene-based monomer unit, a solution-polymerized elastomer having an aromatic vinyl monomer unit and a conjugated diene-based monomer unit, or a combination thereof, at 100 parts by weight; and a plasticizer containing an aromatic petroleum resin and an aliphatic olefin polymer, at 10 to 50 parts by weight. Further, a manufacturing method of the rubber composition for a tire tread is proposed.
Type:
Grant
Filed:
October 15, 2020
Date of Patent:
January 30, 2024
Assignee:
Korea Kumho Petrochemical Co., Ltd.
Inventors:
Jae Yun Kim, Yeong Min Jung, Soo Jung Park, Eun Kyung Noh, Dong Eun Kang
Abstract: Disclosed is a process for producing a polymer polyol, comprising: (a) reacting a first mixture comprising an initiator, a polyol, a diluent, a stabilizer, a styrene-based monomer and a nitrile-based monomer; and (b) continuously adding, to the first mixture, a second mixture comprising an initiator, a polyol, a stabilizer, a styrene-based monomer and a nitrile-based monomer to react, wherein the first mixture and second mixture comprise the stabilizer in a weight ratio of 1:1 to 3, respectively, and a polymer polyol produced according to the process.
Abstract: Disclosed is a method for preparing polymer polyol comprising the steps of: (a) polymerizing polyol and aromatic vinyl monomer in the presence of an organic diluting agent; (b) additionally inputting and polymerizing polyol, aromatic vinyl monomer and unsaturated nitrile monomer in the product of step (a); and (c) removing the organic diluting agent from the product of step (b), wherein the organic diluting agent is compatible with the polymer of the aromatic vinyl monomer.
Abstract: An embodiment of the present invention provides a method for preparing hydrogenated bisphenol A, comprising: (a) heating a reactor in which bisphenol A, a solvent, and a ruthenium supported catalyst are added; (b) supplying hydrogen into the reactor to react; and (c) blocking the supply of hydrogen to react.
Type:
Grant
Filed:
September 14, 2022
Date of Patent:
December 5, 2023
Assignee:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Kee Yoon Roh, Jung Hee Jang, Je Young Park, Nam Hyun Cho
Abstract: An embodiment of the present specification provides a latex composition for dip-forming, comprising a copolymer latex obtained by polymerizing a monomer mixture of a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer; and a polyester polyol, and a dip-formed article prepared therefrom.
Type:
Application
Filed:
December 13, 2022
Publication date:
November 30, 2023
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD
Inventors:
Eunsoo Kang, Ha Jung Lee, Sung Hun Choung
Abstract: An embodiment of the present specification provides a method of preparing a copolymer, which includes steps of: (a) adding a polymerization initiator to a monomer mixture including an aromatic vinyl-based monomer, a first conjugated diene-based monomer, and a farnesene monomer to initiate a reaction; and (b) adding a second conjugated diene-based monomer.
Abstract: A composition for seeded polymerization includes: a compound having dithioate; a mercaptan compound; an aromatic vinyl monomer; and a conjugated diene monomer.
Type:
Grant
Filed:
October 23, 2019
Date of Patent:
October 31, 2023
Assignee:
Korea Kumho Petrochemical Co., Ltd.
Inventors:
Du Seong Ahn, Gwanghoon Kwag, Jae Kon Suh
Abstract: According to an exemplary embodiment of the present invention, provided is a latex composition for dip molding, which includes a copolymer latex formed by polymerizing an isoprene monomer, an ethylenically unsaturated nitrile monomer, and an ethylenically unsaturated acid monomer, wherein a dip-molded article made of the latex composition for dip molding exhibits a durability test result of 45 minutes or more.
Type:
Grant
Filed:
February 16, 2021
Date of Patent:
July 25, 2023
Assignee:
Korea Kumho Petrochemical Co., Ltd.
Inventors:
Sung Hun Choung, Jong Jin Jeon, Kun-Ho Yang
Abstract: Disclosed is a binder composition for an all-solid-state battery including a conjugated diene-based rubber polymer and a solvent, wherein a content of a cis bond in the conjugated diene-based rubber polymer is 90% by weight or more.
Type:
Application
Filed:
January 17, 2023
Publication date:
July 20, 2023
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Han Baek LEE, Hoo-Chae KIM, June PARK, Seung Hyun DO, Bona CHOI
Abstract: A composition for seeded polymerization includes: a seed copolymer which has a compound having dithioate, a mercaptan compound, a first aromatic vinyl monomer, and a first conjugated diene monomer, and has an average particle diameter of 10-30 nm; a second aromatic vinyl monomer; and a second conjugated diene monomer.
Type:
Grant
Filed:
October 23, 2019
Date of Patent:
July 4, 2023
Assignee:
Korea Kumho Petrochemical Co., Ltd.
Inventors:
Du Seong Ahn, Gwanghoon Kwag, Jae Kon Suh
Abstract: The present disclosure relates a system of preparing a phthalonitrile-based compound using a continuous process, the preparation system including: a first reaction unit filled with a mixture including a phthalic acid-based compound and a nitrile-based compound; a second reaction unit connected to the first reaction unit; and a discharge unit connected to the second reaction unit, and in the second reaction unit, there is a fluid flow from the first reaction unit direction to the discharge unit direction, wherein the length of the second reaction unit in the fluid flow direction is 10 fold or more the mean square root of the cross-sectional area perpendicular to the fluid flow direction; and a method of preparing a phthalonitrile-based compound using the same.
Abstract: Embodiments of the present invention provide a functionalized processing aid represented by the following Chemical Formula 1 in which a silane-based compound and a cardanol-derived structure are combined, a preparation method thereof, and a rubber composition including the same: (R1)3Si—R2—Z-(E)n??[Chemical Formula 1] in Chemical Formula 1, the definitions of R1, R2, Z, E, and n are as described in the specification.
Abstract: A method of preparing a thiomethylphenol derivative is disclosed, the method including: (a) carrying out a primary reaction of a phenol derivative represented by the following Chemical Formula 2, a mercaptan derivative represented by R4SH, and paraformaldehyde at a reaction temperature T1 under conditions in which a heterocyclic base having 3 to 10 carbon atoms and an acid are simultaneously present; and (b) carrying out a secondary reaction at a reaction temperature T2 to prepare a thiomethylphenol derivative represented by the following Chemical Formula 1, wherein T1<T2 is satisfied.
Type:
Application
Filed:
October 18, 2021
Publication date:
April 27, 2023
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Kee Yoon ROH, Sang Hun JANG, Jung Hei CHOI
Abstract: An embodiment of the present specification provides a rubber composition for a tire tread, comprising: a rubber polymer; a petroleum resin; and a functionalized processing aid, wherein the functionalized processing aid is a bond of a silane-based compound and a cardanol-derived structure, represented by the following formula 1: (R1)3Si—R2—Z-(E)n??[Formula 1] wherein R1, R2, Z, E and n are as defined in the specification, and a method of manufacturing the same.
Type:
Application
Filed:
September 12, 2022
Publication date:
March 30, 2023
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Jae-Yun KIM, Dong Eun KANG, Junhoo PARK
Abstract: An embodiment of the present invention provides a method for preparing a phthalonitrile-based compound, comprising: (a) feeding a mixture comprising a phthalic acid-based compound and a nitrile-based compound into a first reaction part to react; (b) transferring a resulting product of step (a) to a second reaction part connected to the first reaction part to react under the condition of 350 to 400° C.; and (c) obtaining a phthalonitrile-based compound at a discharge part connected to the second reaction part, wherein the second reaction part has a length in a fluid flow direction which is 10 times or more of a square root of an average cross-sectional area perpendicular to the fluid flow direction.
Abstract: An embodiment of the present invention provides a method for preparing hydrogenated bisphenol A, comprising: (a) heating a reactor in which bisphenol A, a solvent, and a ruthenium supported catalyst are added; (b) supplying hydrogen into the reactor to react; and (c) blocking the supply of hydrogen to react.
Type:
Application
Filed:
September 14, 2022
Publication date:
March 16, 2023
Applicant:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Kee Yoon ROH, Jung Hee JANG, Je Young PARK, Nam Hyun CHO
Abstract: Disclosed is a copolymer including a first part including an aromatic vinyl-based monomer and a conjugated diene-based monomer; and a second part including an aromatic vinyl-based monomer and a conjugated diene-based monomer, wherein the content of the aromatic vinyl-based monomer is 35 to 45% by weight based on a total weight of the copolymer, and the copolymer satisfies Equation 1 below: V1>V2??<Equation 1> wherein V1 is a vinyl content in the first part, and V2 is a vinyl content in the second part.
Type:
Grant
Filed:
October 25, 2019
Date of Patent:
January 10, 2023
Assignee:
KOREA KUMHO PETROCHEMICAL CO., LTD.
Inventors:
Ji Hyun Heo, June Park, Cheolbeom Bae, Sung Hoon Han, Se-Hee Jung