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The preparation of amphoteric surfactants by the condensation of mixed N-alkylethylenediamines and unsaturated acid derivatives, particularly acrylic acid esters, was studied. The reaction proceeded readily near 100 C either neat or with solvents. Saponification of the ester products yielded salts which were water-soluble. The mono-and disodium salts of mixed N-alkyl (Cl1.5 av) ethylenediamine dipropionic and diisobutyric acid (crotonic acid derived) as 1% active in water were completely soluble at all pH levels. The solutions demonstrated no perceptible isoelectric range on addition of 1-10% concentrations of sodium chloride. Data on surface tension, solubility, calcium tolerance, foam, viscosity, color, and density are presented.

The alkoxylation of a new mixture of N-alkylethylenediamines obtained by reacting C 11.5 av. chloroparaffins and ethylenediamine was studied. Ethoxylation in both laboratory glassware or Parr autoclave equipment readily produced 20 mole adducts without alkaline catalysis. The reaction was initiated by the formation of the 3 mole adduct at 160 C and subsequent addition of the alkylene oxide at 90 C. The formation of adducts with mole ratios greater than 20 required an alkaline catalyst. The preparation of propoxylate derivatives necessitated the addition of 2.5-3.0 wt % of caustic catalyst. The preparative time was minimized by operating at 185-190 C and 40-50 psi. The surfactant properties of the alkoxylares were evaluated and correlated with structures and compositions. Data on solubility, surface tension, density, refractive index, pH and foam characteristics are presented. Polyurethane foams were prepared from several of the alkoxylates.

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Alkoxylierte Amine stellen einen wichtigen, wenn auch kleinen (12 ‐ 15 00 t/a) Anteil handelsüblicher oberflächenaktiver Wirkstoffe dar, als Emulgatoren für Korrosionsschutzmittel, in der Textilveredlung und sonstige spezielle Fälle.