Aviation fuel containing dissolved polymer and having reduced tendency to particulate dissemination under shock
AssigneeImperial Chemical Industries PLC
InventorsDesmond Wilfrid John Osmond, Norman Douglas Patrick Smith, Frederick Andrew Waite
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Abstract
A polymer is dissolved in a liquid hydrocarbon fuel which has a flash point of at least 90.degree. F and is of a type suitable for gas turbine aircraft engines in order to reduce the tendency of the fuel to particulate dissemination when the fuel is subjected to shock. The polymer has a viscosity average molecular weight greater than 10.sup.6 or an intrinsic viscosity greater than 2.5 dls./gm. and the amount of polymer is sufficient that there is molecular overlap of polymer molecules in the liquid.
Claims9
A liquid hydrocarbon fuel of flash point at least 90.degree. F. and suitable for use in gas turbine engined aircraft, characterized in that it has a reduced tendency to particulate dissemination on being subjected to shock, the fuel containing dissolved therein an addition polymer of ethylenically unsaturated monomer which is soluble in said hydrocarbon fuel and which has a theta temperature lower than -50.degree. C so that the polymer does not precipitate when the fuel is cooled to low temperature in an aircraft, said polymer having a viscosity average molecular weight greater than 10.sup.6 or of intrinsic viscosity greater than 2.5 dls./gm. in a concentration such that there is molecular overlap of the polymer molecules in the liquid.
Dependencies are inferred from the claim text.