-
公开(公告)号：US11952442B2
公开(公告)日：2024-04-09
申请号：US17251589
申请日：2019-10-28
申请人： LG CHEM, LTD.
发明人： Jin Hyuck Ju , Hyun Min Lee , Hyun Kyou Ha , Kun Ji Kim , Kwang Jin Lee , Yang Jun Jeon , Jae Hyun Park
CPC分类号： C08F14/06 , C08F2/18 , C08F2/22 , C08F2/44 , C08K3/26 , C08K3/30 , C08K2003/262 , C08K2003/265 , C08K2003/267
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.
-
公开(公告)号：US11773194B2
公开(公告)日：2023-10-03
申请号：US17058104
申请日：2019-10-28
申请人： LG CHEM, LTD.
发明人： Kwang Jin Lee , Yang Jun Jeon , Jae Hyun Park , Hyun Kyou Ha
CPC分类号： C08F14/06 , C08K3/26 , C08K5/12 , C08K2003/262
摘要： The present disclosure relates to a vinyl chloride-based polymer having a pH of 7 to 11 and satisfying the number of olefin-type defects (NO) of 1.5 or less and the number of chloro-type defects (NC) of 11.0 or less. The vinyl chloride-based polymer contains reduced defects in the entire polymer and may suppress dehydrochlorination reaction or crosslinking reaction during processing, and effects of preventing discoloration phenomenon, improving heat resistance and preventing the deterioration of physical properties may be expected.
-
公开(公告)号：US11149130B2
公开(公告)日：2021-10-19
申请号：US15774539
申请日：2017-09-05
申请人： LG CHEM, LTD.
发明人： Seong Yong Ahn , Kun Ji Kim , Se Woong Lee , Hyun Kyou Ha , Seong Jae Shin
摘要： The present invention relates to a method of preparing a vinyl chloride-based polymer composite, which comprises dispersing a vinyl chloride-based monomer in water (Step 1); polymerizing the dispersed vinyl chloride-based monomer with an initiator to prepare a polymer slurry by (Step 2); and adding a phosphite to the polymer while drying the polymer slurry, to prepare a vinyl chloride-based polymer composite (Step 3), and a vinyl chloride-based polymer composite prepared by the method and a vinyl chloride-based polymer composite composition.
-
公开(公告)号：US10654954B2
公开(公告)日：2020-05-19
申请号：US15763726
申请日：2017-06-07
申请人： LG CHEM, LTD.
发明人： Jin Hyuck Ju , Hyun Kyou Ha , Joong Chul Lim , Yang Jun Jeon , Min Jeong Kang
IPC分类号： C08F14/06 , C08F114/06 , C08F2/38 , C08L27/06
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).
-
公开(公告)号：US12129318B2
公开(公告)日：2024-10-29
申请号：US17782919
申请日：2021-09-14
申请人： LG CHEM, LTD.
发明人： Kun Ji Kim , Seong Yong Ahn , Heung Kwon Bae , Se Woong Lee , Dae Woo Lee , Hyun Kyou Ha
IPC分类号： C08F6/00 , C08F2/02 , C08F114/06
CPC分类号： C08F114/06 , C08F2/02 , C08F6/005
摘要： The present invention relates to a method for preparing a vinyl chloride-based polymer, including: bulk polymerizing a vinyl chloride-based monomer in a polymerization reactor to prepare a vinyl chloride-based polymer; and adding water and vapor to the polymerization reactor, and heating to remove an unreacted vinyl chloride-based monomer, wherein an addition amount of the water is 0.500 to 5.000 parts by weight based on 100 parts by weight of the vinyl chloride-based polymer.
-
公开(公告)号：US11952443B2
公开(公告)日：2024-04-09
申请号：US17265133
申请日：2019-10-30
申请人： LG CHEM, LTD.
发明人： Yang Jun Jeon , Hyun Min Lee , Hyun Kyou Ha , Kun Ji Kim , Kwang Jin Lee , Jin Hyuck Ju , Jae Hyun Park
CPC分类号： C08F14/06 , C08K3/26 , C08K2201/019
摘要： The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.
-
公开(公告)号：US20220227899A1
公开(公告)日：2022-07-21
申请号：US17606358
申请日：2020-09-07
申请人： LG CHEM, LTD.
发明人： Kwang Jin Lee , Yang Jun Jeon , Jae Hyun Park , Hyun Kyou Ha
IPC分类号： C08F114/06 , C08F2/26 , C08F2/44 , C08K3/26
摘要： A method for producing a vinyl chloride-based polymer, wherein the vinyl chloride-based polymer is produced by sequentially adding a first emulsifier and a second emulsifier, which are different from each other, during polymerization and using a succinate compound as a first emulsifier. The method provides improved processability by achieving low-viscosity properties when plastisol is mixed using the produced polymer, and improved fogging properties by suppressing generation of volatile organic compounds.
-
公开(公告)号：US20210309769A1
公开(公告)日：2021-10-07
申请号：US17265133
申请日：2019-10-30
申请人： LG CHEM, LTD.
发明人： Yang Jun Jeon , Hyun Min Lee , Hyun Kyou Ha , Kun Ji Kim , Kwang Jin Lee , Jin Hyuck Ju , Jae Hyun Park
摘要： The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.
-
公开(公告)号：US20210171674A1
公开(公告)日：2021-06-10
申请号：US16768482
申请日：2018-12-19
申请人： LG CHEM, LTD.
发明人： Se Woong Lee , Seong Yong Ahn , Kun Ji Kim , Hyun Kyou Ha
摘要： The present invention relates to a method for preparing a vinyl chloride-based polymer, more specifically, to a method for preparing a vinyl chloride-based polymer through which it is possible to improve an apparent specific gravity of a vinyl chloride-based polymer to be prepared by controlling a surface tension of a polymerization mixture to 46.5 mN/m or more, and thus, to improve an extrusion amount when extruded, whereby a vinyl chloride-based polymer having excellent processing productivity can be prepared.
-
公开(公告)号：US20200255626A1
公开(公告)日：2020-08-13
申请号：US15774539
申请日：2017-09-05
申请人： LG Chem, Ltd.
发明人： Seong Yong AHN , Kun JI Kim , Se Woong Lee , Hyun Kyou Ha , Seong Jae Shin
摘要： The present invention relates to a method of preparing a vinyl chloride-based polymer composite, which comprises dispersing a vinyl chloride-based monomer in water (Step 1); polymerizing the dispersed vinyl chloride-based monomer with an initiator to prepare a polymer slurry by (Step 2); and adding a phosphite to the polymer while drying the polymer slurry, to prepare a vinyl chloride-based polymer composite (Step 3), and a vinyl chloride-based polymer composite prepared by the method and a vinyl chloride-based polymer composite composition.
-
-
-
-
-
-
-
-
-
搜索结果
23 条记录 (耗时 0.018 秒)
