| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an aromatic polyimide seamless belt using a polyimide precursor aqueous solution composition comprising a water solvent and having good environment adaptability. <P>SOLUTION: A manufacturing method of an aromatic polyimide seamless belt is characterized by heating treatment of a polyimide precursor aqueous solution composition obtained by uniformly dissolving, in a water solvent, a polyamic acid comprised of a repeating unit represented by the following formula (1) together with an imidazole having 0.8 time equivalent or more relative to the carboxyl group of the polyamic acid. In the formula (1), A is a tetravalent group which is a residue after the carboxyl group is removed from the aromatic tetracarboxylic acid and B is a divalent group which is a residue after the amino group is removed from the aromatic diamine having a solubility of 0.1 g/L or more to water at 25°C. <P>COPYRIGHT: (C)2012,JPO&INPIT |
