SYSTEMS AND METHODS FOR FORMING HIGH PERFORMANCE COMPRESSIBLE OBJECTS

The present systems and methods utilize a polyamic acid solution as a precursor to form a polyimide bead having desired properties. The polyamic acid solution may be formed into a polyamic acid droplet. The polyamic acid droplet is then processed to form a polyamic acid bead, such as by extraction o...

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Bibliographische Detailangaben
Hauptverfasser:	LUSTIGER, ARNOLD, CARSTENSEN, BARBARA, MATUSZEK, WALTER, T, PEIFFER, DENNIS, G, POLIZZOTTI, RICHARD, S, DALRYMPLE, DAVID, C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The present systems and methods utilize a polyamic acid solution as a precursor to form a polyimide bead having desired properties. The polyamic acid solution may be formed into a polyamic acid droplet. The polyamic acid droplet is then processed to form a polyamic acid bead, such as by extraction of solvent to concentrate the polyamic acid or by partial chemical imidization of the polyamic acid. The polyamic acid bead is then better able to retain its shape during subsequent processing steps, such as drying and pressurizing, before final thermal imidization. Les systèmes et procédés selon la présente invention utilisent une solution d'acide polyamique en tant que précurseur pour former une perle de polyimide ayant les propriétés désirées. La solution d'acide polyamique peut être transformée en une gouttelette d'acide polyamique. La gouttelette d'acide polyamique est ensuite traitée pour former une perle d'acide polyamique, par exemple par extraction de solvant pour concentrer l'acide polyamique ou par imidation chimique partielle de l'acide polyamique. La perle d'acide polyamique est alors mieux à même de conserver sa forme pendant les étapes de traitement ultérieures, telles que le séchage et la pressurisation, avant imidation thermique finale.