公开(公告)号：US20230220161A1

公开(公告)日：2023-07-13

申请号：US18154057

申请日：2023-01-13

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang-Youl KIM ,  Seong-Jong KIM

IPC: C08G73/10 ,  C08J5/18

CPC classification number: C08G73/1042 ,  C08G73/1071 ,  C08G73/1032 ,  C08J5/18 ,  C08J2379/08

Abstract: The present disclosure relates to a polyimide precursor and flexible polyimide obtained by imidization of the polyimide precursor and having high transparency, high glass transition temperature and low coefficient of thermal expansion.

公开(公告)号：US20230257514A1

公开(公告)日：2023-08-17

申请号：US18189250

申请日：2023-03-24

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang-Youl KIM ,  Jong-Ho SO

IPC: C08G61/08 ,  C08L65/00

CPC classification number: C08G61/08 ,  C08L65/00 ,  C08L2201/50 ,  C08L2203/16 ,  C08G2261/418 ,  C08G2261/3324

Abstract: The present disclosure relates to a cyclic olefin polymer having an epoxy functional group prepared by ring-opening metathesis polymerization and method of preparing the same.