Method for preparing molding powder of polyimide

A polyimide powder for moulding is prepared through preparing polyamide acid from aromatic diamine and dianhydride while adding a mixed solvent of non-protonic polar solvent and toluene or xylene andfine polyimide powder at the beginning of process, heating, dewatering, and cyclizing. The mould part...

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Bibliographische Detailangaben
Hauptverfasser:	FEIFENG HE, ZIXUE QIU, RUBIN WU
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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Beschreibung
Zusammenfassung:	A polyimide powder for moulding is prepared through preparing polyamide acid from aromatic diamine and dianhydride while adding a mixed solvent of non-protonic polar solvent and toluene or xylene andfine polyimide powder at the beginning of process, heating, dewatering, and cyclizing. The mould part by hot-press sintered has 7.7% for elongation of break, 307 J/m for impact strength and 4.5 GPa for elastic modulum.