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US 4,728,574 AGranted
Electric cable with insulation of ethylene vinyl alcohol copolymer and ammonium polyphosphate
AssigneeSocieta' Cavi Pirelli S.p.A.
InventorColin K. Alesbury
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Abstract
A fire retardant polymeric compound comprises a polymer having hydroxyl groups and an inorganic phophate so as to produce a char by the process of intumescence when subjected to combustion. The polymer may be an ethylene vinyl alcohol copolymer and the inorganic phosphate may be ammonium polyphosphate.
Claims4
An insulated electric cable comprising a conductor with a layer of insulation therearound, said layer comprising an ethylene vinyl alcohol copolymer and ammonium polyphosphate.
Dependencies are inferred from the claim text.