CROSS-LINKING GROUP-CONTAINING POLYIMIDE PRECURSOR, CROSS- LINKING GROUP-CONTAINING POLYIMIDE, AND HEAT-RESISTANT ADHESIVE

摘要

PROBLEM TO BE SOLVED: To (1) provide a cross-linking group-containing polyamic acid that is a precursor of a cross-linking group-containing polyimide and has excellent storage stability, to (2) provide a cross-linked polyimide obtained by thermally treating the cross linking group-containing polyimide that has excellent heat resistance and excellent soldering heat resistance, and to (3) provide a heat- resistant adhesive that contains the cross-linked polyimide obtained by thermally treating the cross-linking group-containing polyimide that has excellent heat resistance and excellent soldering heat resistance. SOLUTION: This cross-linking group-containing polyimide precursor characterized by having the cross-linking groups at 5 to 99 mol.% of the molecular terminals of repeating units represented by general formula (1) [Ar1 is a tetravalent group selected from the group consisting of groups of formula (V); X is a divalent group selected from the group consisting of formula (VI)].