Emulsions comprising cationic emulsifiers based on MDIPA ester quats
An emulsion contains A) an alkyl ester quat of formula I wherein R 1 is an acyl radical of a fatty acid with a chain length of from 6 to 24 carbon atoms, with the proviso that a mass fraction of saturated, linear fatty acids with a chain length of from 12 to 24 carbon atoms, is more than 50% by weight, based on all acyl radicals R 1 , wherein R 2 is an alkyl radical having 1 to 6 carbon atoms, wherein a=1-3 and b=1-3, with the proviso that a+b=4, B) at least one consistency regulator, and C) at least one cosmetic oil.
1. An emulsion, comprising:
A) from 0.5% by weight to 10% by weight of an alkyl ester quat of formula I
wherein R 1 is an acyl radical from a saturated, linear fatty acid with a chain length of from 16 to 18 carbon atoms,
R 2 is methyl, and
a=1.8-2.2 and b=1.8-2.2, with the proviso that a+b=4;
B) from 2% by weight to 10% by weight of at least one consistency regulator selected from the group consisting of fatty alcohols having 12 to 24 carbon atoms, glycerol esters, polyglyceryl esters, fatty acids having 12 to 24 carbon atoms, polymer-based thickeners and mixtures thereof; and
C) from 6% by weight to 30% by weight of at least one cosmetic oil selected from the group consisting of silicone oils, functionalized silicones, mineral oils, fatty acid esters, fatty alcohol ethers, natural oils, animal oils and mixtures thereof,
wherein the percent by weight of the amounts of components A), B), and C) are based on a weight of the total emulsion.
2. The emulsion according to claim 1 ,
wherein a mass fraction of R 1 from a saturated, linear fatty acid with a chain length of 18 carbon atoms is more than 60% by weight, based on all acyl radicals R 1 .
3. The emulsion according to claim 1 , wherein the component A) is free of solvent.
4. The emulsion according to claim 1 , wherein the component A) is free of isopropyl alcohol.
5. A cosmetic care and/or cleaning formulation, comprising:
the emulsion according to claim 1 .
6. The emulsion according to claim 1 , wherein
the component A) comprises methyldiisopropanolamine (MDIPA) dialkyl quat with stearic acid,
the component B) is at least one selected from the group consisting of glyceryl stearate and cetearyl alcohol, and
the component C) is at least one selected from the group consisting of mineral oil, isopropyl palmitate, caprylic/capric triglyceride, and dimethicone.
7. The emulsion according to claim 1 , comprising:
from 1% by weight to 6% by weight of the component A), and
from 3% by weight to 6% by weight of the component B),
wherein the percent by weight of the amounts of components A) and B) are based on a weight of the total emulsion.
8. The emulsion according to claim 1 , wherein the emulsion does not exhibit water separation when stored for three months at 45° C.
9. The emulsion according to claim 8 , wherein the emulsion does not exhibit water separation after a triple freeze-thaw cycle between room temperature and −15° C.