Patents by Inventor Jin-Eok Kim
Jin-Eok Kim 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).
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Patent number: 9771310Abstract: The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.Type: GrantFiled: November 25, 2013Date of Patent: September 26, 2017Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Kee Yoon Roh, Jung Hee Jang, Jin Eok Kim
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Patent number: 9464037Abstract: Provided is a styrenated phenol compound represented by Formula 1 in which styrenated phenol and hydroxylamine bind to each other: In Formula 1, n is one of integers of 1 to 3, and R1 and R2 are each hydrogen or one of C1 to C4 alkyl groups. The styrenated phenol compound may maintain curing stimulation property and plasticity, and prevent discoloration when being mixed with a curing agent for an epoxy paint, thereby enhancing exterior quality and storage stability of a product.Type: GrantFiled: September 17, 2014Date of Patent: October 11, 2016Assignee: KOREA KUMHO PETROCHEMICAL CO., LTDInventors: Kee Yoon Roh, Jung Hee Jang, Je Young Park, Jin Eok Kim
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Publication number: 20160207859Abstract: The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.Type: ApplicationFiled: November 25, 2013Publication date: July 21, 2016Inventors: Kee Yoon ROH, Jung Hee JANG, Jin Eok KIM
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Publication number: 20160046562Abstract: Provided is a styrenated phenol compound represented by Formula 1 in which styrenated phenol and hydroxylamine bind to each other: In Formula 1, n is one of integers of 1 to 3, and R1 and R2 are each hydrogen or one of C1 to C4 alkyl groups. The styrenated phenol compound may maintain curing stimulation property and plasticity, and prevent discoloration when being mixed with a curing agent for an epoxy paint, thereby enhancing exterior quality and storage stability of a product.Type: ApplicationFiled: September 17, 2014Publication date: February 18, 2016Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Kee Yoon Roh, Jung Hee Jang, Je Young Park, Jin Eok Kim
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Patent number: 9024073Abstract: Provided are novel thio compounds and a method for preparing the same. More particularly, there is provided a novel thio compound prepared by reacting an alkylation product of p-cresol and dicyclopentadiene with mercaptan and paraformaldehyde. Unlike existing antioxidants such as 2,6-di-t-butyl-4-methylphenol (BHT) being harmful to the human body due to the high volatility, the novel thio compounds of the present invention, which have the low volatility because of their high molecular weight, give no harm to the human body. Further, with excellent performances, they are suitable to replace the existing antioxidants.Type: GrantFiled: August 31, 2010Date of Patent: May 5, 2015Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Hyung Jae Lee, Chang Kyo Shin, Jin Eok Kim
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Patent number: 8835687Abstract: Provided is a method for preparing 4,4?-dinitrodiphenylamine (4,4?-DNDPA) in high yield via the NASH reaction using a mixture of a bis-quaternary ammonium base and a base catalyst for the reaction of urea with nitrobenzene, and a method of preparing 4,4?-bis(alkylamino)diphenylamine (4,4?BAADA) in high yield and purity by hydrogenating the resulting 4,4?-DNDPA with a ketone in the presence of hydrogen and hydrogenation catalyst. The catalyst complex used in the present invention allows easy recovery, provides superior alkaline stability and is capable of reducing production cost.Type: GrantFiled: June 17, 2011Date of Patent: September 16, 2014Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin-Eok Kim, Seoung-IL Kim, Han Jin Kwag, Sang hee Park
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Patent number: 8759587Abstract: Provided is a method of preparing 4,4?-dinitrodiphenylamine (4,4?-DNDPA) in high yield by reacting 4-nitroaniline with excess nitrobenzene via the NASH reaction, and a method of preparing 4,4?-bis(alkylamino)diphenylamine (4,4?BAADA) in high yield and purity by hydrogenating the resulting 4,4?-DNDPA with a ketone compound in the presence of hydrogen and hydrogenation catalyst. The disclosed process is simple, allows selective preparation of 4,4?-DNDPA without byproducts, and thus allows preparation of 4,4?-BAADA in high yield without a complicated purification procedure.Type: GrantFiled: June 17, 2011Date of Patent: June 24, 2014Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin-Eok Kim, Seoung-Il Kim, Han Jin Kwag, Sang hee Park
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Patent number: 8729169Abstract: Disclosed are a novel anti-oxidant for rubber and a synthetic rubber including the same. The disclosed anti-oxidant contains a thio compound. The rubber including the anti-oxidant has excellent thermostability at a temperature of 100° C. or higher, and the anti-oxidant shows a low volatility due to its high molecular weight thus being applicable to manufacture environment-friendly rubber.Type: GrantFiled: April 8, 2011Date of Patent: May 20, 2014Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Hyung Jae Lee, Chang Kyo Shin, Jin Eok Kim
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Publication number: 20120270982Abstract: Disclosed are a novel anti-oxidant for rubber and a synthetic rubber including the same. The disclosed anti-oxidant contains a thio compound. The rubber including the anti-oxidant has excellent thermostability at a temperature of 100° C. or higher, and the anti-oxidant shows a low volatility due to its high molecular weight thus being applicable to manufacture environment-friendly rubber.Type: ApplicationFiled: April 8, 2011Publication date: October 25, 2012Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Hyung Jae Lee, Chang Kyo Shin, Jin Eok Kim
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Patent number: 8283477Abstract: The present invention relates to a method of preparing N-substituted maleimide in high purity and high yield, wherein, unlike a conventional method of preparing N-substituted maleimide after preparing N-substituted maleamic acid, an organic solvent, an acid catalyst, a dehydration co-catalyst and a stabilizer are added into a reactor without separately preparing N-substituted maleamic acid, and then a primary amine is added into the reactor to form an amine salt, maleic anhydride is added into the reactor, and the resulting mixture is subjected to a dehydration-cyclization reaction, wherein water produced during the reaction is azeotropically distilled with the organic solvent so as to effectively suppress formation of a maleimide polymer.Type: GrantFiled: June 24, 2009Date of Patent: October 9, 2012Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin-Eok Kim, Seung-il Kim, Han-Jin Kwag
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Publication number: 20120197044Abstract: The present invention relates to a production method for 4,4?-bis(alkylamino)diphenylamine, and more specifically relates to a method in which 4,4?-dinitrodiphenylamine (4,4?-DNDPA) is produced by reacting urea with nitrobenzene in the presence of a polar organic solvent and a base catalyst, and then the 4,4?-bis(alkylamino)diphenylamine (4,4?-BAADA) is produced by subjecting the 4,4?-DNDPA and a ketone to hydrogenation in the presence of a hydrogenation catalyst.Type: ApplicationFiled: September 30, 2010Publication date: August 2, 2012Applicant: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin Eok Kim, Seung Il Kim, Jung Hee Jang, Han Jin Kwag
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Publication number: 20120172628Abstract: Provided are novel thio compounds and a method for preparing the same. More particularly, there is provided a novel thio compound prepared by reacting an alkylation product of p-cresol and dicyclopentadiene with mercaptan and paraformaldehyde. Unlike existing antioxidants such as 2,6-di-t-butyl-4-methylphenol (BHT) being harmful to the human body due to the high volatility, the novel thio compounds of the present invention, which have the low volatility because of their high molecular weight, give no harm to the human body. Further, with excellent performances, they are suitable to replace the existing antioxidants.Type: ApplicationFiled: August 31, 2010Publication date: July 5, 2012Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Hyung Jae Lee, Chang Kyo Shin, Jin Eok Kim
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Publication number: 20120157713Abstract: Provided is a method for preparing 4,4?-dinitrodiphenylamine (4,4?-DNDPA) in high yield via the NASH reaction using a mixture of a bis-quaternary ammonium base and a base catalyst for the reaction of urea with nitrobenzene, and a method of preparing 4,4?-bis(alkylamino)diphenylamine (4,4?BAADA) in high yield and purity by hydrogenating the resulting 4,4?-DNDPA with a ketone in the presence of hydrogen and hydrogenation catalyst. The catalyst complex used in the present invention allows easy recovery, provides superior alkaline stability and is capable of reducing production cost.Type: ApplicationFiled: June 17, 2011Publication date: June 21, 2012Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Jin-Eok Kim, Seoung-IL Kim, Han Jin Kwag, Sang hee Park
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Publication number: 20120157714Abstract: Provided is a method of preparing 4,4?-dinitrodiphenylamine (4,4?-DNDPA) in high yield by reacting 4-nitroaniline with excess nitrobenzene via the NASH reaction, and a method of preparing 4,4?-bis(alkylamino)diphenylamine (4,4?BAADA) in high yield and purity by hydrogenating the resulting 4,4?-DNDPA with a ketone compound in the presence of hydrogen and hydrogenation catalyst. The disclosed process is simple, allows selective preparation of 4,4?-DNDPA without byproducts, and thus allows preparation of 4,4?-BAADA in high yield without a complicated purification procedure.Type: ApplicationFiled: June 17, 2011Publication date: June 21, 2012Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Jin-Eok Kim, Seoung-IL Kim, Han Jin Kwag, Sang hee Park
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Publication number: 20110124882Abstract: The present invention relates to a method of preparing N-substituted maleimide in high purity and high yield, wherein, unlike a conventional method of preparing N-substituted maleimide after preparing N-substituted maleamic acid, an organic solvent, an acid catalyst, a dehydration co-catalyst and a stabilizer are added into a reactor without separately preparing N-substituted maleamic acid, and then a primary amine is added into the reactor to form an amine salt, maleic anhydride is added into the reactor, and the resulting mixture is subjected to a dehydration-cyclization reaction, wherein water produced during the reaction is azeotropically distilled with the organic solvent so as to effectively suppress formation of a maleimide polymer.Type: ApplicationFiled: June 24, 2009Publication date: May 26, 2011Applicant: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin-Eok Kim, Seung-il Kim, Han-Jin Kwag
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Patent number: 7528285Abstract: The present invention relates to a process for preparing thiomethylphenol derivatives, and particularly to a simple process of preparing thiophenol derivatives by performing a reaction of a phenol derivative, a mercaptan derivative and paraformaldehyde in a solvent in the presence of a given amount of heterocyclic amine base and acids, thereby capable of maintaining a mild reaction condition and providing thiomethylphenol derivatives with an improved discoloration by purification using acids.Type: GrantFiled: May 10, 2007Date of Patent: May 5, 2009Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Hyung-Jae Lee, Jin-Eok Kim
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Publication number: 20080081929Abstract: The present invention relates to a process for preparing thiomethylphenol derivatives, and particularly to a simple process of preparing thiophenol derivatives by performing a reaction of a phenol derivative, a mercaptan derivative and paraformaldehyde in a solvent in the presence of a given amount of heterocyclic amine base and acids, thereby capable of maintaining a mild reaction condition and providing thiomethylphenol derivatives with an improved discoloration by purification using acids.Type: ApplicationFiled: May 10, 2007Publication date: April 3, 2008Inventors: Hyung-Jae Lee, Jin-Eok Kim
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Patent number: 7157605Abstract: 4-aminodiphenylamine is prepared by reacting carbanilide and nitrobenzene in an adequate solvent, which may be nitrobenzene, in the presence of an appropriate organic base, which may be tetramethylammonium hydroxide, alone or in mixture with an inorganic base and subsequently reducing the reaction product in the presence of an appropriate catalyst and hydrogen gas. The subsequent reduction may be carried out on the reaction mixture before the reaction mixture is subjected to separation.Type: GrantFiled: September 14, 2005Date of Patent: January 2, 2007Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Jin-eok Kim, Jong-cheon Park, Kil-sun Lee, Jung-hee Jang
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Publication number: 20060258887Abstract: 4-aminodiphenylamine is prepared by reacting carbanilide and nitrobenzene in an adequate solvent, which may be nitrobenzene, in the presence of an appropriate organic base, which may be tetramethylammonium hydroxide, alone or in mixture with an inorganic base and subsequently reducing the reaction product in the presence of an appropriate catalyst and hydrogen gas. The subsequent reduction may be carried out on the reaction mixture before the reaction mixture is subjected to separation.Type: ApplicationFiled: September 14, 2005Publication date: November 16, 2006Inventors: Jin-eok Kim, Jong-cheon Park, Kil-sun Lee, Jung-hee Jang
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Patent number: 6881865Abstract: Disclosed is a synthesis method of cyclohexyl phenyl ketone with a high selectivity and a high yield from 1,3-butadiene and acrylic acid in the presence or absence of benzene or a non-aromatic organic solvent in the same reaction without a step of separating or purifying intermediates, the synthesis method including sequentially carrying out a [2+4] Diels-Alder reaction, a hydrogenation reaction, a chlorination reaction and a Friedel-Crafts reaction in the presence/absence of benzene or a non-aromatic organic solvent without separation of intermediates.Type: GrantFiled: July 28, 2003Date of Patent: April 19, 2005Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Young J. Joo, Jin Eok Kim, Jeong Im Won, Tae Yi Kang