Patent ID: 11932729
Assignee: NATIONAL UNIVERSITY CORPORATION, IWATE UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A polybenzimidazole production method for producing the polybenzimidazole comprising a repeating unit represented by the formula (1), the method comprising:
a step (1-1) of polymerizing a tetramine compound (3) represented by the following formula (3) and a dicarboxylic acid derivative compound (4) represented by the following formula (4) to provide a polybenzimidazole precursor polyamide containing a repeating unit represented by the following formula (2); and
a step (1-2) of dehydrocyclizing the polybenzimidazole precursor polyamide to provide the polybenzimidazole containing a repeating unit represented by the formula (1),
the formula (1) being as follows:, , wherein
Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula:, , the formula (2) being as follows:, , wherein
Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula:, two Xs are each individually a hydrogen atom or a monovalent organic group; and
R1 is a divalent organic group,
the formula (3) being as follows:, , wherein
Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula:, , and
two Xs are each individually a hydrogen atom or a monovalent organic group,
the formula (4) being as follows:, , wherein
R1 is a divalent organic group; and
R2 and R3 are each individually an aromatic oxy group optionally containing a substituent.