Reaction product of a polyalkenyl succinic acid or its anhydride, a hindered alcohol and an amine

Claim 1

An oil-soluble ashless detergent dispersant composition consisting essentially of a reaction product obtained by reacting in a first stage, at 100° to 250°C, a. a polyalkenyl succinic acid or its anhydride, wherein the polyalkenyl has at least 40 carbon atoms and is a polymer of an α-olefin of 2 to 6 carbon atoms having a molecular weight of 400 to 20000, with b. a hindered alcohol selected from the group consisting of pentaerythritol, dipentaerythritol, tripentaerythritol, neopentylglycol, trimethylol ethane, trimethylol propane and methyl propyl propane diol, wherein the molar ratio of (a):(b) is (2 to 3):(0.5 to 1.0), until the presence of said alcohol (b) cannot be detected to obtain an intermediate product, and then reacting in a second stage, at 50° to 250°C, said intermediate product from the first stage with c. an amine selected from the group consisting of Rnh 2 h 2 n(r'nh) x R'NH 2 ##EQU7## wherein R is alkyl of 1 to 20 carbon atoms, R' is alkylene of 2 to 6 carbon atoms, R" is hydrogen or alkyl of 1-4 carbon atoms, x is an integer from zero to 5, and X, Y and Z are hydrogen or alkyl of 1 to 6 carbon atoms, ethylene oxide and propylene oxide adducts of the above, morpholine, imidazoline, tetrakis (methyl propionyl) tetraethylene pentamine, 1-(3,6,9-triazanonyl)-2-ethyl-imidazoline and 1-(3,6,9,12-tetraazadodecyl)-2-ethyl-imidazoline, said amine having at least one primary or secondary amino group, wherein the sum of the number of moles of the primary and secondary amino groups does not exceed the sum of the moles of ester linkages in said intermediate product and the mole ratio of (a):(c) is (2 to 3):(0.1 to 2), to obtain said reaction product exhibiting characteristic imide ν C =O absorptions at 1780 cm.sup. -1 and 1715 cm.sup. -1 , ester ν C =O absorption at 1745 cm.sup. -1 and amide ν C =O absorption at 1645 cm.sup. -1 , in the infrared absorption spectrum.