Surface-active agents amphoteric

The incorporation of metal salts of amphoteric surface active agents (Mostat Series) as internal antistatic agents in polypropylene fibers has been reported (95). Metal salts of alanine, amidoamine, and imida2oiine-type amphoteric surface-active agents show excellent performance as internal antistatic agents and also improve the dyeing abiUty of the fibers with acid dyes. 

Surfactants, 9 22-23, 784. See also Surface-active agents admixture for cement, 5 485 amphoteric, 14 709 amphoteric (zwitterionic), 24 148 anionic, 24 144-146 applications for, 24 119, 155-161... 

Amphoteric surface active agents consist of an amino acid, usually glycine, substituted with a long-chain alkyl group. Their dissociation in water leads to zwitterions (ions with a positive and negative charge in the same molecule)... 

Anionic and cationic products generally tend to interact with each other, usually diminishing the surface-active properties of both and often resulting in precipitation of the complex formed. Amphoteric compounds can also be incompatible with anionics in acid solution but are generally compatible with cationics and nonionics. Interaction between anionic and cationic agents can sometimes be prevented by addition of a nonionic. In some cases, if an ethoxylated sulphate or phosphate is used as the anionic component a cationic compound produces no obvious precipitation, since the oxyethylene chain acts as dispersant for any complex that may be formed. 

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