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    METHOD OF PREPARING VINYL CHLORIDE-BASED POLYMER
    2.
    发明申请
    METHOD OF PREPARING VINYL CHLORIDE-BASED POLYMER 审中-公开

    公开(公告)号：US20190048110A1

    公开(公告)日：2019-02-14

    申请号：US16079437

    申请日：2017-09-19

    Applicant: LG CHEM, LTD.

    Inventor： Se Woong LEE ,  Seong Yong AHN ,  Kun Ji KIM ,  Hyun Kyou HA

    IPC: C08F14/06 ,  C08F2/38 ,  C08K5/37

    Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which includes inducing the nucleation of particles by adding a mercaptan-based chain transfer agent to a monomer composition including a vinyl chloride-based monomer and a preliminary polymerization initiator (preliminary polymerization); and preparing a polymer by mixing a vinyl chloride-based monomer and the particle nuclei and adding a main polymerization initiator (main polymerization). In the preparation method, a vinyl chloride-based polymer having a uniform molecular weight distribution and a desired number average molecular weight may be provided by controlling a degree of polymerization of a vinyl chloride-based polymer prepared in such a way that dispersibility is ensured by adjusting the point of time to add the mercaptan-based chain transfer agent to the point of time to reach a specific conversion rate of the preliminary polymerization.

    METHOD OF PREPARING VINYL CHLORIDE POLYMER
    5.
    发明申请
    METHOD OF PREPARING VINYL CHLORIDE POLYMER 有权

    公开(公告)号：US20250145743A1

    公开(公告)日：2025-05-08

    申请号：US18832863

    申请日：2023-05-31

    Applicant: LG CHEM, LTD.

    Inventor： Se Woong LEE ,  Hyun Kyou HA ,  Kun Ji KIM ,  Heung Kwon BAE ,  Hyun Chul KIM ,  Yun Seok CHOI

    IPC: C08F14/06 ,  C08F6/28

    Abstract: A method of preparing a vinyl chloride polymer is provided. The method includes: preparing a mixture by adding an alcohol to a vinyl chloride polymer slurry (S1); separating a waste liquid from the mixture to obtain a vinyl chloride polymer (S2); and adding at least a portion of the separated waste liquid to the mixture (S3); wherein a content of the at least a portion of the separated waste liquid added in Step S3 is in the range of 33.0 to 35.0 parts by weight with respect to 100 parts by weight of the mixture.

    CHLOROETHYLENE-BASED NANOCOMPOSITE COMPOSITION AND METHOD OF PREPARING THE SAME (As Amended)
    8.
    发明申请
    CHLOROETHYLENE-BASED NANOCOMPOSITE COMPOSITION AND METHOD OF PREPARING THE SAME (As Amended) 审中-公开
    基于氯乙烯的纳米复合材料组合物及其制备方法（如修改）

    公开(公告)号：US20160137827A1

    公开(公告)日：2016-05-19

    申请号：US14898381

    申请日：2015-04-10

    Applicant: LG CHEM, LTD.

    Inventor： Seong Yong AHN ,  Kun Ji KIM ,  Se Woong LEE ,  Kyung Hyun KIM

    IPC: C08L27/06 ,  C08L1/02 ,  C08L29/04 ,  C08L33/02 ,  C08L31/04

    CPC classification number: C08L27/06 ,  C08F14/06 ,  C08J5/005 ,  C08J2323/28 ,  C08K3/346 ,  C08K9/04 ,  C08K2201/011 ,  C08L1/02 ,  C08L29/04 ,  C08L31/04 ,  C08L33/02 ,  C08L35/00 ,  C08L2205/02 ,  C08L2205/03 ,  C08F2/44 ,  C08F2/20

    Abstract: Disclosed are a chloroethylene-based nanocomposite composition and a method of preparing the same. More particularly, disclosed are a chloroethylene-based nanocomposite composition comprising a chloroethylene-based resin; a nanoclay comprising a coupling agent bonded thereto; and at least one polymer selected from unsaturated organic acid-based resins or polycarboxylic acid-based resins, and a method of preparing the same.According to the present disclosure, a uniformly dispersed water dispersion suspension may be provided by enhancing water dispersion effects of the nanoclay, and superior tensile strength may be exhibited by using the uniformly dispersed water dispersion suspension in chloroethylene-based suspension polymerization, and a chloroethylene nanocomposite having superior transparency may be provided.

    Abstract translation: 公开了一种氯乙烯基纳米复合材料组合物及其制备方法。 更具体地，公开了包含氯乙烯基树脂的氯乙烯基纳米复合材料组合物; 包含与其结合的偶联剂的纳米粘土; 和选自不饱和有机酸类树脂或多元羧酸类树脂中的至少一种聚合物及其制备方法。 根据本公开，可以通过增强纳米粘土的水分散效果来提供均匀分散的水分散体悬浮液，并且通过在氯乙烯基悬浮聚合中使用均匀分散的水分散体悬浮液和氯乙烯纳米复合材料可以显示出优异的拉伸强度 可以提供优异的透明度。

    METHOD OF PREPARING VINYL CHLORIDE-BASED POLYMER
    9.
    发明申请
    METHOD OF PREPARING VINYL CHLORIDE-BASED POLYMER 有权

    公开(公告)号：US20250002613A1

    公开(公告)日：2025-01-02

    申请号：US18708805

    申请日：2023-05-12

    Applicant: LG CHEM, LTD.

    Inventor： Heung Kwon BAE ,  Se Woong LEE ,  Eun Byeol SEO ,  Hyun Kyou HA ,  Kun Ji KIM

    IPC: C08F2/01 ,  C08F2/20 ,  C08F6/00 ,  C08F214/06

    Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer in a polymerization device including: a polymerization reactor; a reflux condenser connected to the polymerization reactor; and a recovery pipe connected to the reflux condenser, the method including: initiating a polymerization by adding a first vinyl chloride-based monomer and an initiator into the polymerization reactor; and recovering a second vinyl chloride-based monomer from the polymerization reactor through the recovery pipe, and performing a polymerization while adding a third vinyl chloride-based monomer into the polymerization reactor, wherein a content of the initiator is 0.105 to 0.110 parts by weight based on 100 parts by weight of a content of the first vinyl chloride-based monomer.

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