Liquid solubilizers comprising ethoxylated fatty alcohols and ethoxylated triglycerides
Solubilizers are described which comprise a) one or more ethoxylated fatty alcohols according to formula (I) in which R 1 is a linear or branched alkyl radical having 6 to 12 carbon atoms and n is on average a number from 2 to 12, b) one or more ethoxylated triglycerides whose acyl radicals are derived from linear or branched saturated fatty acids having 6 to 22 carbon atoms, and c) water and which are liquid and clear at room temperature and do not comprise addition products of ethylene oxide and simultaneously propylene oxide onto fatty alcohols. The solubilizers are suitable in particular for producing cosmetic, dermatological or pharmaceutical formulations.
1 . A solubilizer comprising
a) at least one ethoxylated fatty alcohol according to formula (I)
wherein R 1 is a linear or branched alkyl radical having 6 to 12 carbon atoms and n is on average a number from 2 to 12,
b) at least one ethoxylated triglyceride whose acyl radicals are derived from linear or branched saturated fatty acids having 6 to 22 carbon atoms, and
c) water,
wherein the solubilizer is liquid and clear at room temperature and does not contain addition products of ethylene oxide and simultaneously propylene oxide onto fatty alcohols.
2 . The solubilizer as claimed in claim 1 , which comprises at least two ethoxylated fatty alcohols according to formula (I) and wherein the weight ratio of ethoxylated fatty alcohols of the formula (I) with linear radicals R 1 to ethoxylated fatty alcohols of the formula (I) with branched radicals R 1 is from 40:60 to 60:40.
3 . The solubilizer as claimed in claim 1 , wherein R 1 is a linear or branched alkyl radical having 11 carbon atoms.
4 . The solubilizer as claimed in claim 1 , wherein n on average is a number from 6 to 9.
5 . The solubilizer as claimed in claim 1 , wherein the at least one ethoxylated triglyceride of component b) is selected from addition products of, on average, 20 to 100 mol, of ethylene oxide onto at least one triglyceride.
6 . The solubilizer as claimed in claim 1 , wherein the at least one ethoxylated triglyceride of component b) is selected from addition products of, on average, 20 to 100 mol, of ethylene oxide onto hydrogenated castor oil.
7 . The solubilizer as claimed in claim 1 , which comprises the at least one ethoxylated fatty alcohol of component a) in an amount of from 20 to 70% by weight, the at least one ethoxylated triglyceride of component b) in an amount of from 20 to 60% by weight, and water in an amount of from 1 to 20% by weight.
8 . The solubilizer as claimed in claim 1 , which is free from components containing propylene oxide.
9 . The solubilizer as claimed in claim 1 , which consists of the at least one ethoxylated fatty alcohol of component a), the at least one ethoxylated triglyceride of component b) and water.
10 . A cosmetic, dermatological or pharmaceutical formulation comprising at least one solubilizer as claimed in claim 1 .
11 . A method for producing a cosmetic, dermatological or pharmaceutical formulation comprising the step of adding a solubilizer as claimed in claim 1 , wherein the solubilizer comprises
a1) C 11 -alkyl-O—(CH 2 CH 2 O) 8 —H,
b1) ethoxylated hydrogenated castor oil with 40 ethylene oxide units, and
c) water and
d) either does not comprise substances containing propylene oxide or if it does comprise substances containing propylene oxide, comprises, based on the finished formulation, 1.0% by weight or less, of substances containing propylene oxide,
to at least one other component of a cosmetic, dermatological or pharmaceutical formulation.
12 . A cosmetic, dermatological or pharmaceutical formulation which comprises
a1) C 11 -alkyl-O—(CH 2 CH 2 O) 8 —H,
b1) ethoxylated hydrogenated castor oil with 40 ethylene oxide units, and
c) water and
d) either does not comprise substances containing propylene oxide or if it does comprise substances containing propylene oxide, comprises, based on the finished formulation, 1.0% by weight or less, of substances containing propylene oxide.
13 . The formulation as claimed in claim 11 , which comprises, based on the finished formulation, the ethoxylated alcohol of component a1) from 0.05 to 6.0% by weight and the ethoxylated hydrogenated castor oil with 40 ethylene oxide units of component b1) from 0.02 to 5.0% by weight.
14 . The formulation as claimed in claim 11 , which does not comprise substances containing propylene oxide.
15 . The formulation as claimed in claim 11 , which comprises, based on the finished formulation, an amount of water of from 30.0% by weight or more.
16 . The formulation as claimed in claim 11 , which comprises components that are sparingly soluble in water.
17 . The formulation as claimed in claim 16 , which comprises, based on the finished formulation, 0.01 to 30.0% by weight, of components that are sparingly soluble in water.
18 . The formulation as claimed in claim 1 , which has a clear appearance.