Reaction products of nu-alkylated polyalkylenepolyamines and alkenyl succinic acid anhydrides

Claim 1

A CORROSION-INHIBITING COMPOSITION WHICH COMPRISES A SUBSTANTIALLY NEUTRAL VEHICLE CONTAINING BETWEEN ABOUT 0.003 PER CENT AND ABOUT 50 PER CENT BY WEIGHT OF THE REACTION PRODUCT OBTAINED BY REACTING AN ALKYL MONOHALIDE HAVING BETWEEN EIGHT AND EIGHTEEN CARBON ATOMS PER MOLECULE WITH A POLYALKYLENEPOLYAMINE HAVING ONE MORE NITROGEN ATOM PER MOLECULE THAN THERE ARE ALKYLENE GROUPS IN THE MOLECULE, IN A MOLAR PROPORTION VARYING BETWEEN ABOUT ONE AND ABOUT (X-1) TO ONE, RESPECTIVELY, WHEREIN X REPRESENTS THE NUMBER OF NITROGEN ATOMS IN THE POLYALKYLENEPOLYAMINE MOLECULE, AT A TEMPERATURE OF BETWEEN ABOUT 100* C. AND ABOUT 250* C., FOR A PERIOD OF TIME VARYING BETWEEN ABOUT 6 HOURS AND ABOUT 10 HOURS, TO PRODUCE AN INTERMEDIATE PRODUCT, AND REACTING TO ALKENYL SUCCINIC ACID ANHYDRIDE HAVING BETWEEN TWO CARBON ATOMS AND TWELVE CARBON ATOMS PER ALKENYL RADICAL, WITH SAID INTERMEDIATE PRODUCT, IN A MOLAR PROPORTION VARYING BETWEEN ABOUT (X-1) AND ABOUT ONE TO ONE, RESPECTIVELY, AT A TEMPERATURE OF BETWEEN AMBIENT TEMPERATURES AND ABOUT 150* C., FOR A PERIOD OF TIME VARYING BETWEEN SEVERAL MINUTES AND ABOUT 10 HOURS; THE SUM OF THE NUMBER OF MOLES OF SAID ALKYL HALIDE AND OF SAID ALKENYL SUCCINIC ACID ANHYDRIDE REACTED WITH EACH MOLE OF SAID POLYALKYLENEPOLYAMINE BEING NO GREATER THAN X.