Kageaki Kashiwaya

Preparation and surface-active properties of sulfopropylated N-alkylperfluorooctanamides

Sulfopropylation of perfluorooctanamide or its N-alkyl substituted derivatives gave products which were valuable as anionic surfactants. The amides were prepared by the reaction of ethyl perfluorooctanoate with ammonia orn-alkyl amines (C1-C12), and then treated with 1,3-propanesultone to obtain the desired products. The surfaceactive properties of these compounds were investigated to elucidate the correlation with the chain length of the N-alkyl group. Thus, generally speaking, the N-butyl derivative was found to exhibit properties superior to the others.