Patents by Inventor Wang Rae JOE
Wang Rae JOE 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: 11820851Abstract: The present invention relates to a method of preparing a graft copolymer powder, which includes: preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor and carrying out polymerization; preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and preparing a graft copolymer latex in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization; adding an alkyl methacrylate-based polymer to the graft copolymer latex and carrying out coagulation, and more particularly, to a method of preparing a graft copolymer powder that is excellent in weather resistance, fluidity, mechanical properties, surface gloss and appearance quality.Type: GrantFiled: October 10, 2019Date of Patent: November 21, 2023Assignee: LG CHEM, LTD.Inventors: Min Jung Kim, Yong Yeon Hwang, Bong Keun Ahn, Wang Rae Joe, Jang Won Park, Ji Yoon Jeon
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Patent number: 11384189Abstract: The present invention provides a graft copolymer comprising (A) a seed comprising units derived from an alkyl methacrylate monomer; (B) a core formed on the seed and comprising units derived from an alkyl acrylate monomer; and (C) a shell formed on the core and comprising units derived from one or more one or more selected from the group consisting of an aromatic vinyl-based monomer, a vinyl cyanide-based monomer and an alkyl methacrylate monomer, wherein an average particle diameter of the core is 40 to 90 nm, and a graft ratio of the shell is 10 to 30%, and a thermoplastic resin composition and a thermoplastic resin molded article including the same.Type: GrantFiled: September 12, 2018Date of Patent: July 12, 2022Assignee: LG CHEM, LTD.Inventors: Min Jung Kim, Bong Keun Ahn, Yong Yeon Hwang, Wang Rae Joe, Jang Won Park
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Patent number: 11377515Abstract: A method for preparing a graft copolymer includes the steps of: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and carrying out polymerization; 2) preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and 3) preparing a shell in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization, wherein an activator including a compound represented by Chemical Formula 1 is added in the step 3). In Chemical Formula 1, R1 and R2 are each independently hydrogen, a C1-C10 alkyl group, or *-(C=O)OM2, provided that R1 and R2 are not both hydrogen, and M1 and M2 are each independently an alkali metal.Type: GrantFiled: August 28, 2019Date of Patent: July 5, 2022Assignee: LG CHEM, LTD.Inventors: Bong Keun Ahn, Min Jung Kim, Wang Rae Joe, Yong Yeon Hwang, Jang Won Park, Ji Yoon Jeon
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Publication number: 20220177692Abstract: Provided is a thermoplastic resin composition which includes: a first graft copolymer including a first acrylic rubber polymer; a second graft copolymer including a second acrylic rubber polymer; and a first styrene-based copolymer including an alkyl-substituted styrene-based monomer unit and an acrylonitrile-based monomer unit, wherein the first acrylic rubber polymer has an average particle diameter larger than that of the second acrylic rubber polymer, the first graft copolymer is included in a larger amount than the second graft copolymer, and the sum of the first graft copolymer and the second graft copolymer is 22 parts by weight or less with respect to 100 parts by weight of the sum of the first graft copolymer, the second graft copolymer, and the first styrene-based copolymer.Type: ApplicationFiled: January 27, 2021Publication date: June 9, 2022Inventors: Da Eun SUNG, Tae Hoon KIM, Chun Ho PARK, Yong Hee AN, Wang Rae JOE, Ho Hoon KIM, Jeong Min JANG
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Patent number: 11326050Abstract: Provided are a method of preparing a graft copolymer, a graft copolymer, and a thermoplastic resin molded article including the graft copolymer, the method including: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and performing polymerization; 2) in the presence of the seed, preparing a core by adding an alkyl (meth)acrylate-based monomer and performing polymerization; and 3) in the presence of the core, preparing a shell by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and performing polymerization, wherein the method further includes adding an alkyl acrylate-based polymer. When the alkyl acrylate-based polymer is included in a graft copolymer, a graft copolymer and a thermoplastic resin molded article excellent in weather resistance, fluidity, mechanical properties, and appearance quality can be provided.Type: GrantFiled: August 5, 2019Date of Patent: May 10, 2022Assignee: LG CHEM, LTD.Inventors: Bong Keun Ahn, Min Jung Kim, Jang Won Park, Yong Yeon Hwang, Wang Rae Joe, Ji Yoon Jeon
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Publication number: 20210363282Abstract: The present invention provides a graft copolymer comprising (A) a seed comprising units derived from an alkyl methacrylate monomer; (B) a core formed on the seed and comprising units derived from an alkyl acrylate monomer; and (C) a shell formed on the core and comprising units derived from one or more one or more selected from the group consisting of an aromatic vinyl-based monomer, a vinyl cyanide-based monomer and an alkyl methacrylate monomer, wherein an average particle diameter of the core is 40 to 90 nm, and a graft ratio of the shell is 10 to 30%, and a thermoplastic resin composition and a thermoplastic resin molded article including the same.Type: ApplicationFiled: September 12, 2018Publication date: November 25, 2021Inventors: Min Jung KIM, Bong Keun AHN, Yong Yeon HWANG, Wang Rae JOE, Jang Won PARK
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Patent number: 11091625Abstract: Provided is a thermoplastic resin composition including: a first copolymer including an acrylic rubber-based graft copolymer and an emulsifier including an acid salt; a second copolymer including a unit derived from an alkyl acrylate-based monomer and a unit derived from an alkyl methacrylate-based monomer; and a third copolymer including a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer.Type: GrantFiled: January 17, 2019Date of Patent: August 17, 2021Assignee: LG CHEM, LTD.Inventors: Chun Ho Park, Yong Yeon Hwang, Bong Keun Ahn, Min Jung Kim, Yong Hee An, Wang Rae Joe, Jang Won Park, Jeong Min Jang, Ji Yoon Jeon
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Publication number: 20210246236Abstract: The present invention relates to a method of preparing a graft copolymer powder, which includes: preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor and carrying out polymerization; preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and preparing a graft copolymer latex in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization; adding an alkyl methacrylate-based polymer to the graft copolymer latex and carrying out coagulation, and more particularly, to a method of preparing a graft copolymer powder that is excellent in weather resistance, fluidity, mechanical properties, surface gloss and appearance quality.Type: ApplicationFiled: October 10, 2019Publication date: August 12, 2021Inventors: Min Jung KIM, Yong Yeon HWANG, Bong Keun AHN, Wang Rae JOE, Jang Won PARK, Ji Yoon JEON
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Patent number: 11034778Abstract: The present invention provides a method of preparing a graft copolymer, which comprises: emulsion-polymerizing one or more selected from the group consisting of an aromatic vinyl-based monomer to prepare a seed, a vinylcyano-based monomer and an alkyl (meth)acrylate-based monomer; emulsion-polymerizing the seed and an alkyl (meth)acrylate-based monomer to prepare a core; and emulsion-polymerizing the core, an aromatic vinyl-based monomer and a vinylcyano-based monomer to prepare a shell, wherein one or more steps selected from the group consisting of the steps of preparing the seed, the core and the shell comprises adding an emulsifier comprising a compound represented by Formula 1 below.Type: GrantFiled: November 16, 2018Date of Patent: June 15, 2021Assignee: LG CHEM, LTD.Inventors: Wang Rae Joe, Bong Keun Ahn, Min Jung Kim, Yong Yeon Hwang, Jang Won Park
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Publication number: 20210024678Abstract: The present invention relates to a method for preparing a graft copolymer and a graft copolymer. The method for preparing a graft copolymer includes the steps of: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and carrying out polymerization; 2) preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and 3) preparing a shell in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization, wherein an activator including a compound represented by Chemical Formula 1 is added in the step 3), and wherein the core has an average particle diameter of 320 nm to 520 nm.Type: ApplicationFiled: August 28, 2019Publication date: January 28, 2021Inventors: Bong Keun AHN, Min Jung KIM, Wang Rae JOE, Yong Yeon HWANG, Jang Won PARK, Ji Yoon JEON
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Publication number: 20210002472Abstract: Provided are a method of preparing a graft copolymer, a graft copolymer, and a thermoplastic resin molded article including the graft copolymer, the method including: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and performing polymerization; 2) in the presence of the seed, preparing a core by adding an alkyl (meth)acrylate-based monomer and performing polymerization; and 3) in the presence of the core, preparing a shell by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and performing polymerization, wherein the method further includes adding an alkyl acrylate-based polymer. When the alkyl acrylate-based polymer is included in a graft copolymer, a graft copolymer and a thermoplastic resin molded article excellent in weather resistance, fluidity, mechanical properties, and appearance quality can be provided.Type: ApplicationFiled: August 5, 2019Publication date: January 7, 2021Applicant: LG CHEM, LTD.Inventors: Bong Keun AHN, Min Jung KIM, Jang Won PARK, Yong Yeon HWANG, Wang Rae JOE, Ji Yoon JEON
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Publication number: 20200115540Abstract: Provided is a thermoplastic resin composition including: a first copolymer including an acrylic rubber-based graft copolymer and an emulsifier including a salt of a compound represented by Chemical Formula 1; a second copolymer including a unit derived from an alkyl acrylate-based monomer and a unit derived from an alkyl methacrylate-based monomer; and a third copolymer including a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer.Type: ApplicationFiled: January 17, 2019Publication date: April 16, 2020Applicant: LG CHEM, LTD.Inventors: Chun Ho PARK, Yong Yeon HWANG, Bong Keun AHN, Min Jung KIM, Yong Hee AN, Wang Rae JOE, Jang Won PARK, Jeong Min JANG, Ji Yoon JEON
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Publication number: 20200095346Abstract: The present invention provides a method of preparing a graft copolymer, which comprises: emulsion-polymerizing one or more selected from the group consisting of an aromatic vinyl-based monomer to prepare a seed, a vinylcyano-based monomer and an alkyl (meth)acrylate-based monomer; emulsion-polymerizing the seed and an alkyl (meth)acrylate-based monomer to prepare a core; and emulsion-polymerizing the core, an aromatic vinyl-based monomer and a vinylcyano-based monomer to prepare a shell, wherein one or more steps selected from the group consisting of the steps of preparing the seed, the core and the shell comprises adding an emulsifier comprising a compound represented by Formula 1 below.Type: ApplicationFiled: November 16, 2018Publication date: March 26, 2020Inventors: Wang Rae JOE, Bong Keun AHN, Min Jung KIM, Yong Yeon HWANG, Jang Won PARK
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Patent number: 10569259Abstract: The present disclosure relates to a catalyst for dehydration of glycerin, a preparation method thereof, and a production method of acrolein using the catalyst. Particularly, the catalyst according to an embodiment of the present disclosure is used in a dehydration reaction of glycerin to exhibit high catalytic activity, a high yield, and high selectivity to acrolein and acrylic acid, and has a longer lifetime compared to the conventional catalysts due to a characteristic that coke carbon cannot be easily deposited on the surface of the catalyst.Type: GrantFiled: December 15, 2016Date of Patent: February 25, 2020Assignee: LG CHEM, LTD.Inventors: Jun Seon Choi, Ji Yeon Kim, Joo Young Cheon, Wang Rae Joe, Hye Jeong Ok, Kyung Soo Kim
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Patent number: 10487052Abstract: The present invention relates to a synthesis method of N-substituted maleimides using a non-homogeneous solid acid catalyst, and particularly, a synthesis method of N-substituted maleimides with high synthesis yield by using a zirconium(IV) hydrogen phosphate as a catalyst, by which, the loss of the catalyst is minimized, the separation and recovering processes of the catalyst are simplified, in case when the activity of the separated and recovered catalyst is decreased, the complete regeneration of the catalyst is possible via washing or firing, and solvents that could be used during a washing process of the catalyst are not limited.Type: GrantFiled: November 6, 2017Date of Patent: November 26, 2019Assignee: LG CHEM, LTD.Inventors: Joo Young Cheon, Jun Seon Choi, Ji Yeon Kim, Wang Rae Joe, Kyung Soo Kim, Eung Seob Yeom, Won Kyun Lee
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Patent number: 10464050Abstract: A dehydration catalyst for preparing N-substituted maleimide, which may minimize formation of by-products, is reusable because its activity is not reduced significantly even after being reused several times, and may maintain its reaction activity for a long time, a preparation method thereof, and a method of preparing N-substituted maleimide, are provided.Type: GrantFiled: August 1, 2017Date of Patent: November 5, 2019Assignee: LG CHEM, LTD.Inventors: Ji Yeon Kim, Jun Seon Choi, Joo Young Cheon, Wang Rae Joe, Kyung Soo Kim
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Patent number: 10435347Abstract: The present invention relates to a method for preparing acrylic acid from glycerin. More specifically, the present invention provides a method which can improve the selectivity of acrolein by applying a specific catalyst composition and process conditions to minimize the generation of coke carbon of the catalyst, and can prepare acrylic acid with higher productivity for a longer duration of time because a dehydration reaction can be performed for a longer working period while maintaining catalyst activity at a high level during the reaction.Type: GrantFiled: December 15, 2016Date of Patent: October 8, 2019Assignee: LG CHEM, LTD.Inventors: Kyung Soo Kim, Jun Seon Choi, Ji Yeon Kim, Joo Young Cheon, Wang Rae Joe, Hye Jeong Ok
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Publication number: 20190152910Abstract: The present invention relates to a synthesis method of N-substituted maleimides using a non-homogeneous solid acid catalyst, and particularly, a synthesis method of N-substituted maleimides with high synthesis yield by using a zirconium(IV) hydrogen phosphate as a catalyst, by which, the loss of the catalyst is minimized, the separation and recovering processes of the catalyst are simplified, in case when the activity of the separated and recovered catalyst is decreased, the complete regeneration of the catalyst is possible via washing or firing, and solvents that could be used during a washing process of the catalyst are not limited.Type: ApplicationFiled: November 6, 2017Publication date: May 23, 2019Inventors: Joo Young CHEON, Jun Seon CHOI, Ji Yeon KIM, Wang Rae JOE, Kyung Soo KIM, Eung Seob YEOM, Won Kyun LEE
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Publication number: 20190118168Abstract: A dehydration catalyst for preparing N-substituted maleimide, which may minimize formation of by-products, is reusable because its activity is not reduced significantly even after being reused several times, and may maintain its reaction activity for a long time, a preparation method thereof, and a method of preparing N-substituted maleimide, are provided.Type: ApplicationFiled: August 1, 2017Publication date: April 25, 2019Applicant: LG CHEM, LTD.Inventors: Ji Yeon KIM, Jun Seon CHOI, Joo Young CHEON, Wang Rae JOE, Kyung Soo KIM
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Publication number: 20180273460Abstract: The present invention relates to a method for preparing acrylic acid from glycerin. More specifically, the present invention provides a method which can improve the selectivity of acrolein by applying a specific catalyst composition and process conditions to minimize the generation of coke carbon of the catalyst, and can prepare acrylic acid with higher productivity for a longer duration of time because a dehydration reaction can be performed for a longer working period while maintaining catalyst activity at a high level during the reaction.Type: ApplicationFiled: December 15, 2016Publication date: September 27, 2018Inventors: Kyung Soo KIM, Jun Seon CHOI, Ji Yeon KIM, Joo Young CHEON, Wang Rae JOE, Hye Jeong OK