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公开(公告)号：US10822488B2
公开(公告)日：2020-11-03
申请号：US16069438
申请日：2017-11-01
申请人： LG CHEM, LTD.
发明人： Eun Soo Kang , Yong Yeon Hwang , Hyun Taek Oh , Bong Keun Ahn , Min Jung Kim , Chun Ho Park , Yong Hee An , Jang Won Park
IPC分类号： C08L51/00 , C08L33/10 , C08L33/06 , C08L35/06 , C08L55/00 , C08L51/04 , C08F220/18 , C08L55/02 , C08L23/12 , C08L35/04
摘要： The present invention relates to a thermoplastic resin composition having excellent weather resistance, according to the present invention, the thermoplastic resin composition has excellent weather resistance, gloss, and impact resistance, and thus may be suitable for use as exterior materials for structures, such as siding and window frames.
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公开(公告)号：US11492437B2
公开(公告)日：2022-11-08
申请号：US16084940
申请日：2018-01-12
申请人： LG CHEM, LTD.
发明人： Min Jung Kim , Yong Yeon Hwang , Hyun Taek Oh , Bong Keun Ahn , Chun Ho Park , Eun Soo Kang , Yong Hee An , Jang Won Park
IPC分类号： C08K5/092 , C08F285/00 , B29C45/00 , C08L25/12 , C08L51/04 , B29K96/02 , B29K105/00
摘要： The present invention relates to a method of preparing an ASA graft copolymer, a method of preparing a thermoplastic resin composition including the ASA graft copolymer, and a method of manufacturing a molded article using the thermoplastic resin composition. More particularly, the present invention provides an ASA graft copolymer having improved thermal stability through addition of an emulsifier in a specific amount range in a seed preparation step and introduction of a multifunctional carboxylic acid having 20 or more carbon atoms or a salt thereof, as an emulsifier, in a shell preparation step and a high-quality thermoplastic resin composition exhibiting excellent impact resistance, such as impact strength and tensile strength, and excellent appearance, such as surface gloss, whiteness, and retention-associated heat discoloration, and causing considerable reduction in the amount of gas generated on a surface of a resin during a high-temperature thermoforming process due to inclusion of the ASA graft copolymer.
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公开(公告)号：US11377515B2
公开(公告)日：2022-07-05
申请号：US16968996
申请日：2019-08-28
申请人： LG CHEM, LTD.
发明人： Bong Keun Ahn , Min Jung Kim , Wang Rae Joe , Yong Yeon Hwang , Jang Won Park , Ji Yoon Jeon
IPC分类号： C08F285/00 , C08L51/00 , C08F265/04 , C08L25/12
摘要： 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.-
公开(公告)号：US11034778B2
公开(公告)日：2021-06-15
申请号：US16619063
申请日：2018-11-16
申请人： LG CHEM, LTD.
发明人： Wang Rae Joe , Bong Keun Ahn , Min Jung Kim , Yong Yeon Hwang , Jang Won Park
IPC分类号： C08F2/24 , C08F279/04 , C08F285/00 , C08F279/06 , C08L51/06
摘要： 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.
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公开(公告)号：US11384189B2
公开(公告)日：2022-07-12
申请号：US16339308
申请日：2018-09-12
申请人： LG CHEM, LTD.
发明人： Min Jung Kim , Bong Keun Ahn , Yong Yeon Hwang , Wang Rae Joe , Jang Won Park
IPC分类号： C08L25/12 , C08F265/04 , C08F285/00 , C08L25/14 , C08L51/00
摘要： 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.
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公开(公告)号：US11326050B2
公开(公告)日：2022-05-10
申请号：US16954995
申请日：2019-08-05
申请人： LG CHEM, LTD.
发明人： Bong Keun Ahn , Min Jung Kim , Jang Won Park , Yong Yeon Hwang , Wang Rae Joe , Ji Yoon Jeon
IPC分类号： C08L51/00 , C08F220/18 , C08F212/08 , C08F220/14 , C08F220/44 , C08F236/20 , C08F257/02 , C08F265/06 , C08J3/12
摘要： 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.
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公开(公告)号：US11091625B2
公开(公告)日：2021-08-17
申请号：US16626800
申请日：2019-01-17
申请人： LG CHEM, LTD.
发明人： 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
摘要： 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.
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公开(公告)号：US10647847B2
公开(公告)日：2020-05-12
申请号：US16078477
申请日：2017-12-05
申请人： LG CHEM, LTD.
发明人： Chun Ho Park , Yong Yeon Hwang , Hyun Taek Oh , Bong Keun Ahn , Min Jung Kim , Eun Soo Kang , Yong Hee An , Jang Won Park
摘要： The present invention relates to a thermoplastic resin composition, a method of preparing the same, and a molded part manufactured using the same. More specifically, the present invention provides a thermoplastic resin composition having excellent mechanical properties, such as tensile strength and impact strength, and weather resistance while having low gloss characteristics, a method of preparing the same, and a molded part manufactured using the same. According to the present invention, the thermoplastic resin composition includes an ASA graft copolymer having a core-shell structure having an average particle diameter of 0.05 to 1 μm, an aromatic vinyl compound-vinyl cyanide compound copolymer, and an epoxy group-containing copolymer having a weight average molecular weight of 2,000 to 8,000 g/mol in specific amounts.
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