Rocket motor with ablative insulating casing liner
AssigneeImperial Metal Industries (Kynoch) Limited
InventorsMichael John Chase, Derek Anthony Smith, Michael Alan Dudley
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Abstract
A solid propellant rocket motor is provided with a liner between the motor case and the propellant, the liner comprising a terpolymer of ethylene, propylene and a nonconjugated diene and inert fillers. Ablative fillers such as heavy metal halides, calcium hydroxide and magnesium hydroxide may be included.
Claims6
A rocket motor cas having an insulating liner bonded to the inner surface of the case, said liner comprising a cured elastomer containing 75-100 parts of a terpolymer of ethylene, propylene and a non-conjugated diene, up to 25 parts of at least one other elastomer, 40 to 100 parts of an inert filler material selected from the group consisting of silica and asbestos and 20-80 parts of ablative filler materials other than lead chloride which will decompose at temperatures near to or above the decomposition temperature of the elastomer content of the liner.
A rocket motor case having an insulating liner bonded to the inner surface of the case, said liner comprising a cured elastomer containing 75-100 parts of a terpolymer of ethylene, propylene and a non-conjugated diene, up to 25 parts of at least one other elastomer, 40 to 100 parts of an inert filler material selected from the group consisting of silica and asbestos and 20-80 parts of ablative filler materials which have endothermic heats of decomposition greater than that of the elastomer content of the liner and which will decompose at temperatures near to or above the decomposition temperature of the elastomer content of the liner.
Dependencies are inferred from the claim text.