AROMATIC POLYIMINE, PROCESS FOR PRODUCING THE SAME, AROMATIC POLYIMINE OLIGOMER USED FOR PRODUCING SAID POLYIMINE, AND PROCESS FOR PRODUCING SAID OLIGOMER

摘要

An aromatic polyimine oligomer comprising repeating units composed of an aromatic dialdehyde having a phenolic hydroxyl group and an aromatic diamine and having a number-average degree of polymerization of 2 to 20, and a process for producing the same. An aromatic polyimine and a process for producing the same by thermally dehydrating the oligomer.