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    VINYL CHLORIDE POLYMER AND PREPARATION METHOD THEREOF
    1.
    发明申请
    VINYL CHLORIDE POLYMER AND PREPARATION METHOD THEREOF 审中-公开
    乙烯基氯化聚合物及其制备方法

    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。

    METHOD OF PRODUCING VINYL CHLORIDE-BASED POLYMER
    3.
    发明申请
    METHOD OF PRODUCING VINYL CHLORIDE-BASED POLYMER 有权

    公开(公告)号：US20230002527A1

    公开(公告)日：2023-01-05

    申请号：US17779256

    申请日：2021-07-12

    Applicant: LG CHEM, LTD.

    Inventor： Jae Hyun PARK ,  Joong Chul LIM ,  Hyun Min LEE

    IPC: C08F214/06

    Abstract: Provided is a method of producing a vinyl chloride-based polymer including adding a vinyl chloride monomer and a monomer represented by Chemical Formula 1 to a reactor and performing polymerization, wherein an input amount of the monomer represented by Chemical Formula 1 is 1 to 4 parts by weight based on 100 parts by weight of the vinyl chloride monomer, and the monomer represented by Chemical Formula 1 is continuously added to the reactor.

    POST-PROCESSING APPARATUS
    4.
    发明申请
    POST-PROCESSING APPARATUS 有权

    公开(公告)号：US20220387960A1

    公开(公告)日：2022-12-08

    申请号：US17775834

    申请日：2021-04-16

    Applicant: LG CHEM, LTD.

    Inventor： Se Woong LEE ,  Young Man SONG ,  Hyeong Joon KIM ,  Hyun Min LEE

    IPC: B01J19/10 ,  C08F14/06 ,  C08F6/00

    Abstract: The present invention relates to a post-processing apparatus configured to post-process latex, the post-processing apparatus including: a receiving tank having therein a receiving part and having an inlet port through which the latex is introduced into the receiving part and a discharge port through which the latex is discharged; an ultrasonic wave generating device configured to generate ultrasonic waves to the latex accommodated in the receiving tank; a pressure reducing part configured to reduce a pressure of the receiving part of the receiving tank to discharge an unreacted monomer to the outside of the receiving tank; and a partition part provided in the receiving part of the receiving tank and comprising a plurality of partitions disposed in a direction from the inlet port toward the discharge port of the receiving tank, in which the latex accommodated in the receiving part moves along upper and lower sides of the plurality of partitions.

    METHOD FOR PREPARING POLYMERIZATION INITIATOR COMPOSITION
    8.
    发明申请
    METHOD FOR PREPARING POLYMERIZATION INITIATOR COMPOSITION 有权

    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

    IPC: C08F2/38 ,  C08F14/06 ,  C08F2/22

    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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