| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyimide precursor aqueous solution composition in which environmental adaptability is good by using a water solvent, and moreover since the aromatic polyimide obtained using the same has high crystallinity, it is excellent in characteristics such as heat resistance, mechanical strength, an electrical property, and solvent resistance. <P>SOLUTION: The polyimide precursor aqueous solution composition comprises dissolving a polyamic acid consisting of a repeating unit expressed by chemical formula (1) with imidazoles which have two or more alkyl groups as a substituent of at least 1.6 times moles to the tetracarboxylic acid component of the polyamic acid into a water solvent. In the chemical formula (1), A is a tetravalent group based on tetracarboxylic acid, B is a group based on an aromatic diamine, and the solubility to water at 25°C of the aromatic diamine is at least 0.1 g/L. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
