is heated with stirring and nitrogen blowing at 0 3 scfh to 150 u00b0 c and held for one hour the product has a neutralization number to phenolphthalein of 103 5 an ammonium salt of the above product is prepared by adding 100 parts 0 19 equivalent of the above product to 90 parts of water and 10 5 parts 0 19 equivalent concentrated ammonium hydroxide the mixture is stirred for one quarter hour at room temperature the 50 aqueous solution has a ph of 7 0 7 5 a vessel equipped with a thermometer and a stirrer is charged with 192 parts 0 5 mole of ethomeen c 15 and 130 parts 0 5 mole of the succinic anhydride of example 1 the reaction is exothermic the reaction mixture is then heated to 110 u00b0 c and held for 2 hours infrared spectrum of the product shows no anhydride absorption peaks at 1770 c 1 and 1840 cm 1 the product has a neutralization number of 84 a reaction vessel is charged with 133 parts 0 5 mole of the succinic anhydride of example 1 and 80 5 parts 0 5 mole of n butyl diethanolamine the reaction is exothermic to 80 u00b0 c the reaction mixtire is heated to 110 u00b0 c and stirred for 0 5 hours a reaction vessel is charged with 166 parts 0 5 mole of a isomerized c 16 alpha olefin substituted succinic anhydride and 74 5 parts 0 5 mole of triethanolamine the mixture.