Soap‐based detergent formulations: IV. The synthesis and surface active properties of sulfopropyl esters of N‐substituted iminodiacetic acids

Abstract

A series of di(potassium 3-sulfopropyl) N-alkyl and N-acyliminodiacetates were prepared by reacting 1,3-propanesultone with the corresponding dipotassium N-alkyl and N-acyliminodiacetates, respectively. The washing ability of these products was examined alone and in combination with soap. Whereas the surfactant properties of the precursor iminodiacetates were poor, the addition of two sulfopropyl groups resulted in products with excellent lime soap dispersing power, calcium ion stability and water solubility.

Advances in bar soap technology

“…This has resulted in the discovery of a number of novel and potentially useful new materials, including amphoteric sulfonates (26), sulfons (27), sulfonamides (28), sulfonated phenyl sulfostearic acid derivatives (29), alpha-sulfo fatty acids and esters (30,31), magnesium thiodisuccinic acid (32), vicinal acylamido sulfonates (33,34), hydrogenated olefin sulfonates (35)(36)(37), and alpha olefin sulfonates (38)(39)(40)(41)(42)(43)(44)(45)(46). There also have been a series of papers by Linfield et al, describing lime soap dispersants derived from tallow, including sulfated alcohols, sulfated hydroxyethyl amides, alkylaryl sulfopropionates, oxyethylated diethanolamides, and sulfopropyl esters (47)(48)(49)(50)(51)(52)(53).…”