Thermally stable combustion gas turbine fuels

Claim 1

A COMBUSTION GAS TURBINE FUEL COMPOSITION COMPRISING A MAJOR AMOUNT OF A NORMALLY THERMALLY UNSTABLE, LIQUID HYDROCARBON AVIATION TURBINE FUEL AND A SMALL AMOUNT, SUFFICIENT TO IMPROVE THE THERMAL STABILITY OF SAID FUEL OF A COMBINATION OF (A) AN N,N''-DI(ORTHOHYDROXYARYLMETHYLIDENE) ALKYLENEPOLYAMINE CONTAINING 2 TO 3 AMINO NITROGEN ATOMS AND WHOSE ALKYLENE GROUPS CONTAIN 2 TO 6 CARBON ATOMS EACH, AND (B) AN OIL-SOLUBLE COPOLYMER OF (I) A MONOMERIC ALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS WHOSE ALKYL ESTER SUBSTITUENT CONTAINS 8 TO 18 CARBON ATOMS, AND (II) A MONOMERIC SALT FORMED FROM SUBSTANTIALLY EQUIVALENT PROPORTIONS OF AN ACID SELECTED FROM THE AFORESAID GROUP AND AN AMINE HAVING AS AT LEAST ONE N-SUBSTITUENT AN ALIPHATIC HYDROCARBON RADICAL CONTAINING 8 TO 18 CARBON ATOMS, AND AS THE OTHER N-SUBSTITUENTS MEMBERS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALIPHATIC HYDROCARBON RADICALS CONTAINING 1 TO 18 CARBON ATOMS AND ALKYLOL GROUPS CONTAINING 1 TO 4 CARBON ATOMS; SAID MONOMERIC AMINE SALT AND SAID MONOMERIC ALKYL ESTER BEING COPOLYMERIZED IN A WEIGHT RATIO IN THE RANGE OF ABOUT 0.03:1 TO 1:1, SAID SMALL AMOUNT COMPRISING AT LEAST ABOUT 2.5 POUNDS OF EACH MEMBER OF SAID COMBINATION PER THOUSAND BARRELS OF FUEL.