Aqueous surfactant compositions

An aqueous surfactant composition comprising

• one or more alpha-sulfo fatty acid disalt (A) of general formula (I)
• R1CH(SO3M1)COOM2 (I),
• in which the radical R1 is a saturated, linear alkyl radical having 10 to 16 carbon atoms and the radicals M1 and M2, independently of one another, are selected from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium, and alkanolamine;
• one or more alkanolamide (B) selected from the group of compounds of general formula (IIa), (IIb) and (IIc)
• R13CO—NR14R15 (IIa)
• R13—CO—NR14R16 (IIb)
• R13—CO—NR14R17 (IIc),
• wherein the radical R13 in compounds (IIa) is a linear or branched alkyl radical having 6 to 18 carbon atoms and the radicals R14 and R15, independently of each other, are a linear or branched hydroxyalkyl group having 1 to 4 carbon atoms;
• wherein the radical R13 in compounds (IIb) is a linear or branched alkyl radical having 6 to 18 carbon atoms, the radical R14 is a linear or branched hydroxyalkyl group having 1 to 4 carbon atoms, and the radical R16 is hydrogen;
• and wherein the radical R13 in compounds (IIc) is a linear or branched alkyl radical having 6 to 18 carbon atoms, the radical R14 is a linear or branched hydroxyalkyl group having 1 to 4 carbon atoms, and the radical R17 is an alkyl group having 1 to 4 carbon atoms;
• one or more compound (C) of general formula (III)
• R4COOM5 (III),
• in which the radical R4 is a linear or branched alkyl or alkenyl radical having 7 to 19 carbon atoms and the radical M5 is selected from the group consisting of H, Li, Na, K, Ca/2, Mg/2, ammonium, and alkanolamine;
• one or more inorganic salt of sulfuric acid (D) of general formula (IV)
• (M6)2SO4 (IV),
• wherein M6 is selected from the group consisting of Li, Na, K, Ca/2, Mg/2, ammonium, and alkanolamine;
• and
• water,
• where the following provisos apply:
• with regard to compound (A) it is the case that the fraction of the compound (A) in which the radical R1 is a decyl or dodecyl radical, based on the total amount of the compound (A), is 90% by weight or more;
• the content of compound (A) is in the range from 60 to 100% by weight based on the sum of compounds (A), (C), and (D) in the aqueous surfactant composition;
• the content of compound (C) is in the range from more than 0 to 20% by weight based on the sum of compounds (A), (C), and (D) in the aqueous surfactant composition;
• the content of compound (D) is in the range from more than 0 to 20% by weight based on the sum of compounds (A), (C), and (D) in the aqueous surfactant composition;
• and
• if the aqueous surfactant compositions comprise one or more ester sulfonate (E) of general formula (V)
• R2CH(SO3M7)COOR3 (V),
• in which the radical R2 is a linear or branched alkyl or alkenyl radical having 6 to 18 carbon atoms and the radical R3 is a linear or branched alkyl or alkenyl radical having 1 to 20 carbon atoms, where the radical R3 can be an alkenyl radical or be branched only above 3 carbon atoms, and the radical M7 is selected from the group consisting of Li, Na, K, Ca/2, Mg/2, ammonium, and alkanolamine, it is the case that the compound (A), based on the totality of the compounds (A) and (E), must be present to an extent of 50% by weight or more.