| abstract |
Oligopeptide derivatives of the general formula I in which one of the groups R 'or R 2 is hydrogen or an alkyl group with 1 -4 C atoms and the other is an alkyl or alkenyl group with 6 -22 C atoms, R 3 represents the rest of an oligopeptide which may be on the N atom of basic amino acid soap groups contains further MOOC-CHR'-CHR'-CO groups and M represents hydrogen or an alkali metal, alkaline earth metal, ammonium ion, mono-, di- or trialkanolammonium ion, one can be obtained by partial hydrolysis animal or vegetable protein to a hydrolyzate with an average molecular weight of 200-20,000 and reaction of the hydrolyzate with a substituted succinic anhydride of the general formula II Prepare in the presence of a base at a pH above 8. They are suitable as skin-friendly surfactants. |