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公开(公告)号：US20160304636A1
公开(公告)日：2016-10-20
申请号：US15101803
申请日：2015-09-14
Applicant: LG CHEM, LTD.
Inventor： Kyung Seog YOUK , Hyun Min LEE , Chan Hee LEE , Heung Kwon BAE , Kwang Jin LEE , Kyung Hyun KIM , Jung Rae LEE
IPC: C08F14/06
CPC classification number: C08F114/06 , C08F8/32 , C08F8/40 , C08F14/06
Abstract: The present invention relates to a vinyl chloride polymer having good thermal stability due to the restraint of dehydrochlorination by heat or ultraviolet rays, and a method of preparing the same. The generation of the dehydrochlorination of the vinyl chloride polymer due to heat or ultraviolet rays may be markedly restrained, the thermal stability thereof may be improved, and the discoloration thereof or the modification of the physical properties thereof may be prevented. In addition, a modifier may be introduced to a polymerization process at the end of the polymerization, and high thermal stability may be attained without generating the transformation of the vinyl chloride polymer.
Abstract translation: 本发明涉及由于热或紫外线的脱氯化氢的限制而具有良好热稳定性的氯乙烯聚合物及其制备方法。 可以显着抑制由于热或紫外线而产生的氯乙烯聚合物的脱氯化氢，其热稳定性可以提高，并且可以防止其变色或其物理性质的改变。 此外，可以在聚合结束时将改性剂引入聚合方法，并且可以在不产生氯乙烯聚合物的转化的情况下获得高热稳定性。
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公开(公告)号：US20190055331A1
公开(公告)日：2019-02-21
申请号：US16078217
申请日：2017-10-12
Applicant: LG CHEM, LTD.
Inventor： Jung Rae LEE , Kyung Seog YOUK , Heung Kwon BAE , Hyun Min LEE
Abstract: The present invention relates to a vinyl chloride-based polymer composition and a method for producing the same, and more particularly, to a vinyl chloride-based polymer composition including a vinyl chloride-based polymer and a plasticizer, wherein the vinyl chloride-based polymer includes a higher fatty acid having 10 to 18 carbon atoms in an amount of more than 0.05 parts by weight to less than 2.0 parts by weight, based on 100 parts by weight of the vinyl chloride-based polymer.
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公开(公告)号：US20180016371A1
公开(公告)日：2018-01-18
申请号：US15545617
申请日：2016-10-07
Applicant: LG CHEM, LTD.
Inventor： Jung Rae LEE , Kyung Seog YOUK , Heung Kwon BAE , Hyun Min LEE
IPC: C08F130/08
CPC classification number: C08F130/08 , C08F2/00 , C08F8/26 , C08F8/42 , C08F14/06 , C08F292/00 , C08K3/34 , C08F2/44 , C08L27/06 , C08F214/06
Abstract: The present invention relates to a vinyl chloride-based polymer which has improved thermal stability and a method for preparing the same. The vinyl chloride-based polymer includes silicate compound derived units, and a dehydrochloric acid (dehydrochlorination) reaction due to heat or ultraviolet rays may be suppressed, and thus, thermal stability may be improved, and discoloration and deformation of physical properties may be prevented. Accordingly, the vinyl chloride-based polymer and the method for preparing the same may be readily applied to industries requiring a vinyl chloride-based polymer, for example, industries related to a vinyl chloride-based resin and molded articles thereof.
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4.发明申请PREPARATION METHOD OF VINYL CHLORIDE POLYMER AND VINYL CHLORIDE POLYMER PREPARED THEREBY 有权氯乙烯聚合物及其制备的氯乙烯聚合物的制备方法公开(公告)号：US20160369018A1
公开(公告)日：2016-12-22
申请号：US15121683
申请日：2015-09-14
Applicant: LG CHEM, LTD.
Inventor： Kyung Seog YOUK , Hyun Min LEE , Chan Hee LEE , Heung Kwon BAE , Kwang Jin LEE , Kyung Hyun KIM , Jung Rae LEE
IPC: C08F114/06
CPC classification number: C08F114/06 , C08F8/32 , C08F8/40 , C08F14/06
Abstract: The present invention relates to a method of preparing a vinyl chloride polymer having good thermal stability by restraining a dehydrochlorination reaction due to heat or ultraviolet rays, and a vinyl chloride polymer prepared thereby. According to the preparation method, the adding point of a modifier is controlled, and a vinyl chloride polymer markedly restraining the generation of dehydrochloric acid due to heat or ultraviolet rays may be prepared. Therefore, the preparation method of the vinyl chloride polymer via the emulsion polymerization and the vinyl chloride polymer prepared thereby in the present invention may be readily applied to industries requiring the vinyl chloride polymer such as industries concerning a vinyl chloride resin and a molded article.
Abstract translation: 本发明涉及通过抑制由于热或紫外线引起的脱氯化氢反应而制备具有良好热稳定性的氯乙烯聚合物的方法和由此制备的氯乙烯聚合物。 根据制备方法，可以控制改性剂的添加点，并且可以制备显着抑制由于热或紫外线而产生脱盐酸的氯乙烯聚合物。 因此，本发明中通过乳液聚合制备的氯乙烯聚合物和由其制备的氯乙烯聚合物的制备方法可以容易地应用于需要氯乙烯聚合物的行业，例如涉及氯乙烯树脂和模制品的行业。
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公开(公告)号：US20240002568A1
公开(公告)日：2024-01-04
申请号：US18035450
申请日：2022-08-17
Applicant: LG CHEM, LTD.
Inventor： Jae Bum SEO , Dae Woo LEE , Jung Tae PARK , Jung Rae LEE , Ji Uk JANG , Kyeong Soo SHIN
IPC: C08F222/30 , C08F2/00
CPC classification number: C08F222/30 , C08F2/001
Abstract: The present disclosure relates to a method of preparing a polymer including preparing a first polymer mixture by polymerizing while continuously adding a monomer mixture comprising a (meth)acrylate-based monomer, a vinyl aromatic monomer, and a first vinyl cyanide-based monomer to a first reactor; and preparing a second polymer mixture by polymerizing while continuously adding a second vinyl cyanide-based monomer and the first polymer mixture to a second reactor, wherein a starting time of the continuous addition of the second vinyl cyanide-based monomer and the first polymer mixture is a time when a polymerization conversion rate is 40.0 to 55.0%, and a weight ratio of the first vinyl cyanide-based monomer and the second vinyl cyanide-based monomer is 10:90 to 35:65.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220348695A1
公开(公告)日：2022-11-03
申请号：US17264750
申请日：2020-06-22
Applicant: LG CHEM, LTD.
Inventor： Heung Kwon BAE , Hyun Min LEE , Kyung Seog YOUK , Joong Chul LIM , Se Woong LEE , Jung Rae LEE
Abstract: The present invention provides a post-treatment method of a vinyl chloride-based polymer including: (a) preparing a stream containing vinyl chloride-based polymer powder and unreacted vinyl chloride-based monomers by drying a vinyl chloride-based polymer latex in a drying unit; (b) filtering the stream containing the vinyl chloride-based polymer powder and the unreacted vinyl chloride-based monomers in a filtering unit; and (c) recirculating a gas containing the unreacted vinyl chloride-based monomers discharged from the filtering unit to a latex storage unit.
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公开(公告)号：US20210198388A1
公开(公告)日：2021-07-01
申请号：US17056973
申请日：2019-10-07
Applicant: LG CHEM, LTD.
Inventor： Heung Kwon BAE , Kyung Seog YOUK , Jung Rae LEE , Hyun Min LEE , Joong Chul LIM , Min Jeong KANG
Abstract: The present disclosure provides a method for preparing a polymerization initiator composition, including (a) a step of mixing water and a water-soluble initiator to prepare an aqueous initiator solution having a concentration of 1 to 10%; and (b) a step of activating the aqueous initiator solution, wherein the step of activating is performed by (b-1) a step of heat treating the aqueous initiator solution for 0.5 to 4.5 hours at a temperature of 48 to 62° C.; and (b-2) a step of treating the aqueous initiator solution to achieve pH of 1 to 7, where the steps above are performed in no particular order.
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公开(公告)号：US20230250210A1
公开(公告)日：2023-08-10
申请号：US18013202
申请日：2021-11-19
Applicant: LG CHEM, LTD.
Inventor： Ji Uk JANG , Dae Woo LEE , Jae Bum SEO , Jung Tae PARK , Jung Rae LEE
IPC: C08F285/00
CPC classification number: C08F285/00
Abstract: The present disclosure relates to a method of preparing a graft polymer, which includes: performing primary continuous polymerization by adding a diene-based rubber polymer and an aromatic vinyl-based monomer to a first reactor; and performing secondary continuous polymerization by adding the polymerization product discharged from the first reactor, a maleimide-based monomer, and a vinyl cyanide-based monomer to a second reactor.
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公开(公告)号：US20220220232A1
公开(公告)日：2022-07-14
申请号：US17607306
申请日：2020-09-25
Applicant: LG CHEM, LTD.
Inventor： Se Woong LEE , Heung Kwon BAE , Hyun Min LEE , Kyung Seog YOUK , Joong Chul LIM , Jung Rae LEE
Abstract: The present invention provides a method for preparing a vinyl chloride-based polymer, the method including (1) polymerizing a vinyl chloride-based monomer in the presence of a vinyl chloride-based first seed particle, a vinyl chloride-based second seed particle, and an emulsifier and (2) separating, after the polymerizing, a first vinyl chloride-based polymer and a second vinyl chloride-based polymer which are in a particulate form, wherein the separated first vinyl chloride-based polymer is dried using a fluid bed dryer (FBD), and the first vinyl chloride-based polymer has a smaller average particle diameter (D50) than the second vinyl chloride-based polymer, and two kinds of polymers having different physical properties may be prepared through a single manufacturing process.
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10.发明申请公开(公告)号：US20180134822A1
公开(公告)日：2018-05-17
申请号：US15572688
申请日：2016-11-15
Applicant: LG CHEM, LTD.
Inventor： Kyung Seog YOUK , Heung Kwon BAE , Hyun Min LEE , Jung Rae LEE
Abstract: The present invention relates to a vinyl chloride-based polymer, a method of preparing the same, and a plastisol including the vinyl chloride-based polymer. The vinyl chloride-based polymer according to the present invention may exhibit high viscosity characteristics in a low shear region by having particle size distribution characteristics, in which particles having a relatively small particle diameter and particles having a relatively large particle diameter are distributed at a specific ratio, and may exhibit low viscosity characteristics in a high shear region due to small increases in viscosity and stress as shear rate increases, and thus, the vinyl chloride-based polymer may be easily used in a spray coating process.Therefore, the vinyl chloride-based polymer according to the present invention and the method of preparing the same may be easily applied to industries that need them, for example, vinyl chloride-based resin industry for paste processing.
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