公开(公告)号：US20200377625A1

公开(公告)日：2020-12-03

申请号：US16634268

申请日：2018-09-20

Applicant: LG CHEM, LTD.

Inventor： Jin Sook RYU ,  Kyoung Hwan OH ,  Woo Jin CHO ,  Suk Youn KANG ,  Sung Joon OH ,  Sun Ok OH

IPC: C08C19/25 ,  C08F4/52

Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.

公开(公告)号：US20220244235A1

公开(公告)日：2022-08-04

申请号：US17617196

申请日：2020-06-19

Applicant: LG CHEM, LTD.

Inventor： Hyo Yong KIM ,  Jin Sook RYU ,  Sunok OH ,  Sung Joon OH

IPC: G01N33/44 ,  G01N24/08 ,  B01D15/34

Abstract: Provided is a method of analyzing a copolycarbonate. More particularly, provided is a method of analyzing a copolycarbonate, in which a polysiloxane structure is introduced into the main chain of a polycarbonate, the method capable of more accurately analyzing a weight average molecular weight, a number average molecular weight, and a molecular weight distribution of a polysiloxane-containing aromatic diol compound which is used as a starting material.

公开(公告)号：US20210277235A1

公开(公告)日：2021-09-09

申请号：US16332389

申请日：2017-12-13

Applicant: LG CHEM, LTD.

Inventor： Duk Hun JANG ,  Byung Guk KIM ,  Young Sik EOM ,  Sung Yeol CHOI ,  Sang Gon KIM ,  Jin Sook RYU ,  Sun Ok OH ,  Hyung Sam CHOI

IPC: C08L79/08 ,  C08G73/10

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based block copolymer film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film having low haze and yellow index value while exhibiting excellent transparency.