Thermally stable jet fuel composition

Claim 1

A turbine fuel composition according to claim 1 in which said condensation product is N,N''-disalicylidene-1,2-propanediamine and said terpolymer consists of ethylene, butene-1 and dicyclopentadiene.

Claim 5

A method for operating a turbine engine which comprises supplying to and burning in said engine a turbine fuel composition comprising a a mixture of hydrocarbons boiling in the range from about 90* to 550* F. containing from about (1) 0.0003 to 0.01 weight percent of an aldehyde-amine condensation product represented by the formula: in which R is a divalent hydrocarbyl radical having from two to four carbon atoms, and (2) 0.0005 to 0.1 weight percent of an ethylene C3 to C4 olefin-non-conjugated-diene terpolymer-maleic anhydride C1 to C18 alkyl monoamine reaction product prepared by forming a mixture of from 1 to 50 percent maleic anhydride and the balance said ethylene C3 to C4 olefin-non-conjugated-diene terpolymer and heating said mixture above about 200* C. until the reaction has been substantially completed to form a first reaction product and then reacting this with from about 0.5 to 15.0 percent of a C1 to C18 alkyl monoamine at a temperature above about 100* C. to form the final reaction product, said ethylene C3 to C4 olefin-non-conjugated-diene terpolymer consisting of ethylene, a C3 or C4 olefin and a non-conjugated diene having from five to 30 carbon atoms, in the mole ratios of from 10 to 90 mole percent ethylene, 5 to 70 mole percent C3 or C4 olefin and 0.1 to 20 mole percent of said diene, said terpolymer being amorphous and having an Inherent Viscosity in the range of 0.2 to 0.9.