| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a production method, by which polyimide fine particles comprising a specified chemical structure and having a uniform particle diameter, preferably polyimide fine particles having an average particle diameter of less than 2.0μm and monomodal particle size distribution, can be stably and efficiently obtained with high reproducibility. <P>SOLUTION: The method of producing polyimide particles, which include a tetracarboxylic acid component essentially comprising pyromellitic acids and a diamine component essentially comprising paraphenylene diamine, is characterized in that the tetracarboxylic acid component and the diamine component are subjected to polymerization-imidization reaction in a solvent containing water in a molar amount 0.1 to 5.0 times as much as the amount of the tetracarboxylic acid component to precipitate polyimide particles. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
