Abstract
Some higher homologues of alkylthioethylamine were synthesized by radical addition of β-aminoethanethiol to α-olefin. From these amines, various cationic surfactants containing -S-, -SO-, -SO2- in the main chains were synthesized. Influences of these sulfurs on surface activities were examined. The orders of their surface activities among the three types of cationics having the same alkyl group were as follows : solubility in water, -SO->-S->>-SO2-; lowering of surface tension of water, -S->-SO-≈-SO2-; foaming, -S->-SO->-SO2-; bacteriostatic action, -S->-SO->>-SO2-.
