Exothermic compositions
AssigneeFoseco International Limited
InventorsMax G. Neu, Michael J. Gough
Life of this patent
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Abstract
An exothermic composition comprises a particulate readily oxidizable metal such as aluminium, magnesium or silicon and an organic fluorine-containing compound, and usually an oxidizing agent for the readily oxidizable 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.
Claims15
An exothermic composition comprising a particulate readily oxidisable metal, and an oxidising agent for the metal, and an organic fluorine-containing compound, said organic fluorine-containing compound being polytetrafluoroethylene, polyhexafluoropropylene, polychlorofluoroethylene or polyvinyl fluoride, said oxidising agent being one or more of iron oxide, manganese dioxide, sodium nitrate, potassium nitrate, sodium chlorate or potassium chlorate.
Dependencies are inferred from the claim text.