The aromatic diamine compound of the present invention is represented by the following formula (1), and from the aromatic diamine compound a polyimide having a repeating unit represented by the following formula (4), which has low-temperature adherability, can be obtained.
In the formulas (1) and (4), n is an integer of 3 to 7, each R is independently an atom or a group selected from the group consisting of a hydrogen atom, a halogen atom and a hydrocarbon group, the same or different two hetero atoms selected from nitrogen atoms and oxygen atoms bonded to each benzene ring are at the ortho- or meta-positions to each other on at least one benzene ring, and when n is 3, the hetero atoms are at the ortho- or meta-positions to each other on all the benzene rings. In the formula (4), Y is a tetravalent organic group.
本发明的芳香族二胺化合物由以下式子(1)表示,并且可以从该芳香族二胺化合物获得具有低温粘附性的重复单元由以下式子(4)表示的聚
酰亚胺。在式子(1)和(4)中,n是3到7的整数,每个R独立地是氢原子,卤素原子和碳氢基团中选择的一种原子或基团,选择的两个同异构原子(选择自氮原子和氧原子)与至少一个苯环上的其他同异构原子在邻位或间位位置上结合,当n为3时,这些异构原子在所有苯环上均在邻位或间位位置上。在式子(4)中,Y是四价有机基团。