Curing preceramic polymers by exposure to nitrogen dioxide

The present invention relates to a rapid method of infusibilizing (curing) preceramic polymers comprising treating said polymers with gaseous nitrogen dioxide. The infusibilized polymers produced thereby may be pyrolyzed to temperatures in excess of about 800 DEG C. to yield ceramic materials with l...

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Bibliographische Detailangaben
Hauptverfasser:	RABE, JAMES ALAN, LIPOWITZ, JONATHAN, LU, PAUL PU-YUAN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	The present invention relates to a rapid method of infusibilizing (curing) preceramic polymers comprising treating said polymers with gaseous nitrogen dioxide. The infusibilized polymers produced thereby may be pyrolyzed to temperatures in excess of about 800 DEG C. to yield ceramic materials with low oxygen content and, thus, good thermal stability. The methods of this invention are especially useful for the production of ceramic fibers and, more specifically, to the on-line production of ceramic fibers.