Use Of N-Methyl-N-Acylglucamines As Cold Stabilizers In Surfactant Solutions
The invention relates to the use of N-methyl-N-acylglucamines as cold stabilizers in aqueous surfactant solutions, wherein at least 90 wt.-% of the N-methyl-N-acylglucamines have a C 8 -acyl or C 10 -acyl group. The invention further relates to compositions containing (a) N-methyl-N-acylglucamines, wherein at least 90 wt.-% of the N-methyl-N-acylglucamines have a C 8 -acyl or C 10 -acyl group as component (A), (b) one or more anionic surfactants as component (B), (c) one or more betaine surfactants as component (C), (d) optionally additional surfactants as component (D), (e) water as component (E), and (f) optionally additional additives as component (F).
1 . The use of N-methyl-N-acylglucamines as cold stabilizers in aqueous surfactant solutions, where at least 90% by weight of the N-methyl-N-acylglucamines contain a C 8 -acyl or C 10 -acyl group.
2 . The use as claimed in claim 1 , wherein the aqueous surfactant solutions comprise an alkyl sulfate and/or an alkyl ether sulfate as anionic surfactant and a betaine surfactant.
3 . The use as claimed in claim 1 or 2 , wherein the aqueous surfactant solutions comprise a linear C 8 -C 20 -alkyl sulfate and/or a linear C 8 -C 20 -alkyl ether sulfate.
4 . The use as claimed in claim 3 , wherein the aqueous surfactant solutions comprise lauryl sulfate and/or a lauryl ether sulfate.
5 . The use as claimed in any of claims 1 to 4 , wherein the aqueous surfactant solutions comprise an acylamidopropyl betaine or an alkyl betaine.
6 . A composition comprising
(a) N-methyl-N-acylglucamines where at least 90% by weight of the N-methyl-N-acylglucamines contain a C 8 -acyl or C 10 -acyl group as component (A),
(b) one or more anionic surfactants as component (B),
(c) one or more betaine surfactants as component (C),
(d) optionally further surfactants as component (D),
(e) water as component (E),
(f) optionally further additives as component (F).
7 . A composition comprising
(a) 0.01% to 5.0% by weight of component (A),
(b) 1.0% to 20.0% by weight of component (B),
(c) 0.1% to 10.0% by weight of component (C),
(d) 0% to 5.0% by weight of component (D),
(e) 55.0% to 98.89% by weight of component (E),
(f) 0% to 5.0% by weight of component (F).
8 . The composition as claimed in claim 6 or 7 in the form of a hair shampoo, shower gel, hand soap or face cleanser.