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。

公开(公告)号：US20180002466A1

公开(公告)日：2018-01-04

申请号：US15543174

申请日：2016-09-09

Applicant: LG CHEM, LTD.

Inventor： Chan Hee LEE ,  Kwang Jin LEE ,  Hyun Min LEE ,  Kyung Seog YOUK

IPC: C08F214/06

CPC classification number: C08F214/06 ,  C08F2/24 ,  C08F218/08

Abstract: The present invention relates to a vinyl chloride-vinyl acetate copolymer, which may exhibit excellent tensile strength even during low-temperature processing, and a method of preparing the same. The copolymer according to the present invention may exhibit excellent tensile strength even during low-temperature processing by including a vinyl acetate-derived unit in a specific ratio and having a specific range of polydispersity index, for example, a polydispersity index of 2.1 to 2.4, at a degree of polymerization of 1,200 to 1,300. Thus, the vinyl chloride-vinyl acetate copolymer according to the present invention and the method of preparing the same may be easily applied to industries that need them, particularly, automotive industry or polyvinyl chloride resin industry.

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。