Polyoxyethylenated long-chain amines

Diamines and polyamines Quaternary ammonium salts Polyoxyethylenated long-chain amines Corrosion inhibitor Water-soluble Surface adsorption to silicaeous materials... 

CATIONIC SURFACTANTS Long -chain amines and their salts Diamines and polyamines and their salts Quaternary ammonium salts Polyoxyethylenated (POE) long- chain amines Quatemized polyoxyethylenated long-chain amines Amine oxides... 

Long-chain molecules with active hydrogen (alcohols, amines, and amides) react as nucleophiles with ethylene oxide usually with a basic catalyst. The product has a hydroxyl group that can react with further ethylene oxide, leading to polyoxyethylene products with a range of molecular weights. The average number of ethylene oxide molecules added depends on the reaction conditions and can be adjusted to alter the solubility and surfactant properties of the product. 

To avoid agglomeration, one possibility is to use a saturated fatty acid instead of oleic acid. Also, the use of such surface-active agents that are both oxidation inhibitors and form micelles only at concentrations larger than the ones used is recommended. Examples of such surfactants are the polyoxyethylene fatty amines. Since the critical concentration for micelle formation increases with decreasing alkyl- and increasing ethylene oxide chain length, short alkyl and long polyoxyethylene chains are favorable, such as Ethomeen C-25. 

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