| abstract |
[PROBLEMS] To provide a terminal crosslinkable polyamic acid oligomer which can have a high Tg, particularly a Tg of 300 ° C. or higher and a thermal decomposition temperature of 500 ° C. or higher, 2) toughness, and 3) a high-concentration solution. The polyamic acid oligomer of the present invention comprises an aromatic tetracarboxylic dianhydride containing 2,2 ', 3,3'-biphenyltetracarboxylic dianhydride, an aromatic diamine compound, an amino group or It is obtained by reacting an acid anhydride group and a reactive crosslinking agent having a crosslinkable group in a molecule, and has a crosslinkable group at a molecular terminal. [Selection diagram] None |