Corrosion preventive compositions

Claim 1

A LIQUID CORROSION PREVENTIVE COMPOSITION FOR METAL SURFACES CONSISTING ESSENTIALLY OF A PETROLEUM HYDROCARBON AND THE REACTION PRODUCT OF FROM 1 TO 15 PARTS BY WEIGHT OF A PETROLEUM HYDROCARBON OXIDATE WITH 1 PART BY WEIGHT OF THE PRODUCT OBTAINED FROM CONDENSATION UNDER DEHYDRATING CONDICTIONS OF ABOUT 1 TO 2 MOLS OF A MONO CARBOXYLIC ACID CONTAINING FROM 8 TO 22 CARBON ATOMS AND ABOUT 1 MOL OF A POLYALKYLENE POLYAMINE SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE POLYAMINES AND POLYPROPYLENE POLYAMINESCONTAINING FROM 2 TO 4 ALKYLENE GROUPS AND FROM 3 TO 5 AMINO GROUPS AND HYDROXYALKYL ALKYLENE DIAMINES CONTAINING FROM 2 TO 3 CARBON ATOMS IN THE ALKYL GROUP AND FROM 2 TO 3 CARBON ATOMS IN THE ALKYLENE GROUP, SAID PETROLEUM OXIDATE CONSISTING ESSENTIALLY OF A MIXTURE OF HIGH MOLECULAR WEIGHT ALIPHATIC ACIDS, HYDROXY-CARBOXYLIC ACIDS, ALCOHOLS, KETOALCOHOLS, KETO-ACIDS, ESTERS, LACTONES, KETONES, AND PARTIALLY OXIDIZED HYDROCARBONS HAVING 5 TO 35 CARBON ATOMS, SAID OXIDATE HAVING A MEAN MOLECULAR WEIGHT IN THE RANGE OF 200 TO 600, ACID NUMBER IN THE RANGE OF 100 TO 200. SAPONIFICATION NUMBER IN THE RANGE OF 40 TO 300 AND AN UNSAPONIFIABLE CONTENT IN THE RANGE OF 10 TO 70 PERCENT BY WEIGHT.