The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2018
Filed:
Oct. 12, 2016
Korea Institute of Science and Technology, Seoul, KR;
Hyoung-Juhn Kim, Seoul, KR;
Eun Ki Kim, Seoul, KR;
So Young Lee, Seoul, KR;
Jong Hyun Jang, Seoul, KR;
Jin Young Kim, Seoul, KR;
Sung Jong Yoo, Seoul, KR;
Dirk Henkensmeier, Seoul, KR;
Dae Ki Choi, Seoul, KR;
Jonghee Han, Seoul, KR;
Suk Woo Nam, Seoul, KR;
KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul, KR;
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.