EXOTHERMIC COMPOSITIONS

An exothermic composition comprises a particulate readily oxidisable metal such as aluminium, magnesium or silicon and an organic fluorine-containing compound, and usually an oxidising agent for the readily oxidisable metal. The preferred organic fluorine-containing compound is polytetrafluoroethyle...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GOUGH, MICHAEL JOHN, NEU, MAX GERHARD
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES FOUNDRY MOULDING LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PERFORMING OPERATIONS POLISHES POWDER METALLURGY REFRACTORIES SLAG TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	An exothermic composition comprises a particulate readily oxidisable metal such as aluminium, magnesium or silicon and an organic fluorine-containing compound, and usually an oxidising agent for the readily oxidisable metal. The preferred organic fluorine-containing compound is polytetrafluoroethylene. The composition may also contain a binder, a particulate refractory material, refractory fibres and/or organic fibres. The composition may be used in the casting of molten metal, either in particulate form or as a preformed shape such as a sleeve or board, to cover or surround molten metal in the feeder of a casting mould or in the head or head box of an ingot mould.