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公开(公告)号：EP3789410A1
公开(公告)日：2021-03-10
申请号：EP19795973.7
申请日：2019-04-29
申请人： LG CHEM, LTD.
发明人： AHN, Seong Yong , KIM, Kun Ji , LEE, Se Woong , JU, Jin Hyuck , HA, Hyun Kyou
IPC分类号： C08F14/06 , C08F114/06 , C08F2/18
摘要： The present invention relates to a vinyl chloride polymer and a production method thereof. More specifically, the present invention provides a vinyl chloride polymer having a polydispersity index of 2.0 to 2.3 and a porosity of 60 % or greater and a production method of the vinyl chloride polymer. The production method of the vinyl chloride polymer is specifically a method in which a vinyl chloride polymerization seed having a conversion rate of 5-20 % is first prepared through preliminary polymerization and then a vinyl chloride monomer is introduced into the vinyl chloride polymerization seed to polymerize (main polymerization) a vinyl chloride polymer, and at this time, the temperature difference between the preliminary polymerization and the main polymerization is controlled to be 5-15°C. The production method has an effect of improving polymerization productivity, and since a vinyl chloride polymer produced by the production method may exhibit desired physical properties, the production method also has an effect of improving fish eye quality and initial coloring properties and having excellent processability.
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公开(公告)号：EP4112677A1
公开(公告)日：2023-01-04
申请号：EP22739759.3
申请日：2022-01-14
申请人： Lg Chem, Ltd.
发明人： YOON, Hyungki , HUR, Young Jae , JU, Jin Hyuck , AHN, Taebin , PARK, Dong Hoon , SHIN, Kwangin , KIM, Jae Soon
摘要： The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer capable of preparing a super absorbent polymer in which the residual monomer content and the extractable content are simultaneously reduced by adding a reducing agent capable of a redox reaction with a thermal polymerization initiator before drying the hydrogel polymer.
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3.发明授权
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公开(公告)号：EP2952542B1
公开(公告)日：2019-01-02
申请号：EP14847716.9
申请日：2014-09-30
申请人： LG Chem, Ltd.
发明人： LEE, Dong Kwon , KIM, Kwang Hyon , PARK, Bo Hee , LEE, Se Woong , JU, Jin Hyuck
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公开(公告)号：EP4458884A1
公开(公告)日：2024-11-06
申请号：EP23894877.2
申请日：2023-11-06
申请人： LG Chem, Ltd.
发明人： YOON, Hyungki , JU, Jin Hyuck , SHIN, Kwangin , AHN, Taebin
摘要： The present disclosure relates to super absorbent polymer that are excellent in all properties including centrifuge retention capacity, absorption under pressure, vortex time, 1min tap water free absorbency, and rewet property, and thus, can exhibit high absorption performance and excellent use feel when used in hygiene products such as diapers, and the like, and a method for preparing the same.
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公开(公告)号：EP3875500A1
公开(公告)日：2021-09-08
申请号：EP19880552.5
申请日：2019-10-28
申请人： LG CHEM, LTD.
发明人： JU, Jin Hyuck , LEE, Hyun Min , HA, Hyun Kyou , KIM, Kun Ji , LEE, Kwang Jin , JEON, Yang Jun , PARK, Jae Hyun
摘要： The present disclosure provides a method for preparing a vinyl chloride-based polymer, the method including a step of injecting an ionizable normal salt and polymerizing a vinyl chloride monomer in the presence of one or more emulsifiers and a polymerization initiator, wherein the ionizable normal salt includes a carbonate metal salt or a sulfite metal salt, and the ionizable normal salt is continuously injected in an amount of 70 to 1200 ppm based on the total weight of the vinyl chloride monomer when a polymerization conversion rate is in a range of 0% to 20%. The method capable of preparing a vinyl chloride-based polymer suitable as an eco-friendly material, while not affecting the rate of polymerization reaction and decreasing the generation amount of total volatile organic compounds by controlling the injection time, injection amount and kind of the ionizable normal salt, is provided.
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公开(公告)号：EP3243852B1
公开(公告)日：2020-09-09
申请号：EP16820907.0
申请日：2016-07-29
申请人： LG Chem, Ltd.
IPC分类号： C08F214/06 , C08F222/40
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8.发明公开
公开(公告)号：EP3333197A1
公开(公告)日：2018-06-13
申请号：EP17789779.0
申请日：2017-03-14
申请人： LG Chem, Ltd.
摘要： The present invention provides a method for preparing a vinyl chloride-based polymer comprising performing suspension polymerization of vinyl chloride-based monomer, wherein an aromatic hydrocarbon-based compound is added when a pressure change is 0.5 to 1.5 kg/cm 2 with respect to an equilibrium pressure at a polymerization temperature in a polymerization reactor after the vinyl chloride-based monomer is added to the polymerization reactor, wherein the aromatic hydrocarbon-based compound comprises a reactive functional group having an intracarbon double bond and a hydroxyl group; and a vinyl chloride-based polymer prepared by the method and having a high polymerization degree and excellent fusion processability.
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公开(公告)号：EP4194486A1
公开(公告)日：2023-06-14
申请号：EP21907139.6
申请日：2021-12-17
申请人： Lg Chem, Ltd.
发明人： SHIN, Kwangin , JU, Jin Hyuck , YOON, Hyungki , AHN, Taebin , PARK, Dong Hoon
摘要： The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, the above method performs a polymerization reaction of a monomer in the presence of an aqueous dispersion of hydrophobic particles, and thus a super absorbent polymer having an improved absorption rate can be prepared without deterioration in absorption properties.
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公开(公告)号：EP3336110A1
公开(公告)日：2018-06-20
申请号：EP17815626.1
申请日：2017-06-07
申请人： LG Chem, Ltd.
摘要： The present invention relates to a method of preparing a vinyl chloride-based polymer, and more specifically, to a method comprising the steps of, (S1) preparing a mixture in which a first protective colloid auxiliary agent and a chain regulator are mixed; (S2) preparing a second protective colloid auxiliary agent including the chain regulator activated by stirring the mixture prepared in step (S1) ; and (S3) performing polymerization by adding a vinyl chloride-based monomer and a polymerization initiator in the presence of the second protective colloid auxiliary agent prepared in step (S2).
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