METHOD FOR PRODUCING POLYAMIC ACID PARTICULATE AND POLYIMIDE PARTICULATE

PROBLEM TO BE SOLVED: To provide a method capable of producing polyimide particulates having higher monodispersibility in an industrial scale. SOLUTION: The method for producing polyimide particulates comprises synthesizing a polyimide from anhydrous tetracarboxylic acid and a diamine compound. The...

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Hauptverfasser:	YAMAMOTO KAZUHIKO, TATE HIDEKI, YOSHIOKA YAYOI, OKADA WATARU, ASAO KATSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method capable of producing polyimide particulates having higher monodispersibility in an industrial scale. SOLUTION: The method for producing polyimide particulates comprises synthesizing a polyimide from anhydrous tetracarboxylic acid and a diamine compound. The method comprises (a) a first step of preparing (1) a first solution containing anhydrous tetracarboxylic acid in an amount exceeding the solubility in the solvent, and (2) a second solution containing a diamine compound in an amount exceeding the solubility in the solvent, (b) a second step of mixing the first solution and the second solution under stirring by virtue of stirring vanes and ultrasonic irradiation and precipitating polyamic acid particulates from the mixed solution, and (c) a third step of imidizing the polyamic acid particulates to obtain polyimide particulates. COPYRIGHT: (C)2006,JPO&NCIPI