Ester compositions
Mixture compositions made of specifically chosen alkyl carboxylates can be used in a process for the preparation of ester compositions. These mixture compositions and ester compositions can be used in cosmetic applications.
1 . A mixture composition, comprising:
a first alkyl carboxylate group of the general formula (Ia)
general formula (Ia),
and
a second alkyl carboxylate group of the general formula (Ib)
general formula (Ib),
with
R 1a and R 1b are each hydrocarbon acyl radicals exhibiting from 10 to 30 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
R 2a and R 2b are each hydrocarbon acyl radicals exhibiting from 12 to 22 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
with the proviso
that R 2a is different from R 2b , and
that the alkyl carboxylates of the first group and of the second group in total are present in an amount of at least 55% by weight, the percentages by weight referring to all alkyl carboxylates present in the mixture composition,
wherein the ratio by weight of all alkyl carboxylates of the first group to all alkyl carboxylates of the second group is from 10.0:1.0 to 1.0:1.0; and
said mixture has a melting point of less than 25° C.
2 . The mixture composition according to claim 1 , wherein the amount of R 1a , R 1b , R 2a and R 2b radicals in total, which exhibit an uneven number of carbon atoms, is less than or equal to 40% by weight, the percentages by weight referring to all R 1a , R 1b , R 2a and R 2b radicals present in the mixture composition.
3 . The mixture composition according to claim 1 , wherein R 2a is a lauryl radical and R 2b is a myristyl radical.
4 . The mixture composition according to claim 3 , wherein the alkyl carboxylates of the first group and of the second group are present in total in an amount of 70% by weight to 99% by weight, the percentages by weight referring to all alkyl carboxylates present in the mixture composition.
5 . The mixture composition according to claim 4 , wherein the alkyl carboxylates of the first group and of the second group are present in total in an amount 85% by weight to 95% by weight.
6 . The mixture composition according to claim 3 , wherein the alkyl carboxylates of the second group are present in an amount of 15% by weight to 35% by weight, the percentages by weight referring to all alkyl carboxylates present in the mixture composition.
7 . The mixture composition according to claim 6 , wherein the alkyl carboxylates of the second group are present in an amount of 20% by weight to 30% by weight.
8 . The mixture composition according to claim 3 , wherein the mixture composition contains lauryl palmitate and/or myristyl myristate in total in an amount of 0.5% by weight to 7.0% by weight, the percentages by weight referring to all alkyl carboxylates present in the mixture composition.
9 . The mixture composition according to claim 1 , wherein R 1a and R 1b are selected from the group consisting of saturated or unsaturated, linear, hydrocarbon acyl radicals exhibiting 18 carbon atoms.
10 . The mixture composition according to claim 9 , wherein the carbon atoms of R 1a and R 1b are mono and/or diunsaturated.
11 . The mixture composition according to claim 1 , wherein the alkyl carboxylates of the first group and of the second group in total are present in an amount of at least 80% by weight.
12 . The mixture composition according to claim 1 , wherein ratio by weight of all alkyl carboxylates of the first group to all alkyl carboxylates of the second group is 3.5:1.0 to 2.5:1.0.
13 . The ester composition obtainable by a process comprising:
A) supplying a first alcohol and a second alcohol, different from the first alcohol, which are independently hydrocarbon alcohols exhibiting from 12 to 22 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
B) supplying at least one carboxylic acid exhibiting from 10 to 30 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
C) esterifying the first and second alcohols with the acid, with an ester composition being obtained, and optionally
D) purifying the ester composition,
wherein the ratio by weight of the amount of the first alcohol to the amount of the second alcohol is from 85.0:15.0 to 1.0:1.0; and
said mixture has a melting point of less than 25° C.
14 . A cosmetic formulation, comprising:
the mixture composition according to claim 1 .
15 . A process, comprising:
A) supplying a first alcohol and a second alcohol, different from the first alcohol, which are independently hydrocarbon alcohols exhibiting from 12 to 22 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
B) supplying at least one carboxylic acid exhibiting from 10 to 30 carbon atoms and are saturated or unsaturated, linear or branched, and/or optionally hydroxy-substituted,
C) esterifying the first and second alcohols with the acid, with an ester composition being obtained, and optionally
D) purifying the ester composition,
wherein the ratio by weight of the amount of the first alcohol to the amount of the second alcohol is from 85.0:15.0 to 1.0:1.0; and
said mixture has a melting point of less than 25° C.
16 . The process according to claim 15 , wherein the sum of the amount of the first alcohol and of the amount of the second alcohol comes to at least 55% by weight, with reference to all alcohols used in the process.
17 . The process according to claim 15 , wherein the first alcohol is chosen from lauryl alcohol and the second alcohol is chosen from myristyl alcohol.
18 . The process according to claim 15 , wherein the acid is at least one acid selected from the group consisting of oleic acid and linoleic acid.
19 . The process according to claim 15 , wherein C) is carried out by enzyme catalysis.
20 . A method for the dispersing of solid pigments and/or for the dissolution of organic UV screening agents, the method comprising:
mixing solid pigments and/or organic UV sunscreen agents with the mixture composition according to claim 1 .
21 . A cosmetic formulation, comprising:
the ester mixture composition according to claim 13 .
22 . A method for the dispersing of solid pigments and/or for the dissolution of organic UV screening agents, the method comprising:
mixing solid pigments and/or organic UV sunscreen agents with the ester mixture composition according to claim 13 .