公开(公告)号：US20180050984A1

公开(公告)日：2018-02-22

申请号：US15292106

申请日：2016-10-12

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyoung-Juhn KIM ,  Eun Ki KIM ,  So Young LEE ,  Jong Hyun JANG ,  Jin Young KIM ,  Sung Jong YOO ,  Dirk Henkensmeier ,  Dae Ki CHOI ,  Jonghee HAN ,  Suk Woo NAM

IPC: C07C303/44 ,  C07C309/24 ,  C07C303/32

CPC classification number: C07C303/44 ,  C07C303/32 ,  C07C309/24

Abstract: Disclosed are a method for preparing a pure isophthalaldehyde bisulfite adduct free from impurities through a specific purification process, and use thereof as a starting material for polymerizing polybenzimidazole under a mild condition. According to the present disclosure, it is possible to obtain a pure isophthalaldehyde bisulfite adduct free from impurities, such as unreacted materials or byproducts. In addition, it is possible to accomplish industrial mass production of a high-molecular weight polybenzimidazole by using the adduct as a starting material for polymerizing polybenzimidazole under a mild condition in an organic solvent.