by applying vacuum the resulting product is the ester amine which is useful as an intermediate in the preparation of the compounds of the present invention to 561 0 grams of dimer acid is added 200 0 grams of dimethylethanol amine the mixture is heated to 180 200 u00b0 c keeping the temperature of the distillate coming off at no more than 102 u00b0 c this temperature assures that minimal amounts of the amine distill off with the water made during the reaction once the temperature reaches 200 u00b0 c hold for 3 8 hours an excess of the amine is added to speed up the reaction when the acid value reaches 1 0 mg koh gram the excess amine is stripped off by applying vacuum the resulting product is the dimer ester amine which is useful as an intermediate in the preparation of the compounds of the present invention the product is a yellow water insoluble liquid at ambient temperatures to 561 0 grams if dimer acid is added 200 0 grams of dimethylethanol amine the mixture is heated to 180 200 u00b0 c keeping the temperature of the distillate coming off at no more than 102 u00b0 c this temperature assures that minimal amounts of the amine distill off with the water made during the reaction once the temperature reaches 200 u00b0 c hold for 3 8 hours.