Mixture composition comprising glycolipids and triethyl citrate

1. A composition, comprising:

0.2% by weight to 70% by weight of at least one glycolipid,

0.01% by weight to 14% by weight of triethyl citrate, and

water,

wherein the percentages by weight refer to the total composition, wherein a weight ratio of all glycolipids to all triethyl citrate comprised in the composition is in a range of from 5:1 to 20:1.

2. The composition according to claim 1 , wherein a pH of the composition at 25° C. is from 4.5 to 7.0.

3. The composition according to claim 1 ,

wherein the composition comprises 40% by weight to 70% by weight of the at least one glycolipid, wherein the percentages by weight refer to the total composition.

4. The composition according to claim 1 ,

wherein the composition comprises 0.2% by weight to 12%, by weight of the at least one glycolipid, wherein the percentages by weight refer to the total composition.

5. The composition according to claim 1 , wherein said composition comprises 51% by weight to 95% by weight of diRL-C10C10,

wherein the percentages by weight refer to a sum total of all rhamnolipids present,

wherein diRL-C10C10 is a di-rhamnolipid of formula (I) or salts thereof, in which radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o==6,

wherein formula (I) is

wherein

m=1,

n=1.

6. The composition according to claim 1 , wherein said composition comprises 0.5% by weight to 9% by weight of monoRL-C10C10, wherein the percentages by weight refer to a sum total of all rhamnolipids present,

monoRL-C10C10 is a mono-rhamnolipid of formula (I) in which radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6,

wherein formula (I) is

wherein

m=1,

n=0.

7. The composition according to claim 1 , which comprises di-rhamnolipids and mono-rhamnolipids,

wherein a weight ratio of all di-rhamnolipids present to all mono-rhamnolipids present is greater than 51:49.

8. The composition according to claim 1 , wherein said composition comprises 0.5 to 25% by weight of diRL-C10C12, wherein the percentages by weight refer to a sum total of all rhamnolipids present,

wherein diRL-C10C12 is a di-rhamnolipid of formula (I) and salts thereof, in which one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 ═(CH 2 ) o —CH 3 wherein o=8,

wherein formula (I) is

wherein

m=1,

n=1.

9. The composition according to claim 1 , wherein said composition comprises:

0.1% by weight to 5% by weight of monoRL-C10C12, and/or

0.1% by weight to 5% by weight of monoRL-C10C12:1,

wherein the percentages by weight refer to a sum total of all rhamnolipids present,

wherein monoRL-C10C12 is a mono-rhamnolipid of formula (I), in which one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 ═(CH 2 ) o —CH 3 wherein o=8,

wherein monoRL-C10C12:1 is a mono-rhamnolipid of formula (I), in which one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 where o=6 and remaining radical R 1 or R 2 =an unbranched, unsubstituted hydrocarbon radical having 9 carbon atoms having 1 double bond,

wherein formula (I) is

wherein

m=1,

n=0.

10. The composition according to claim 1 , wherein said composition comprises:

0.5% by weight to 15% by weight of diRL-C10C12:1,

0.5 to 25% by weight of diRL-C10C12,

0.1% by weight to 5% by weight of monoRL-C10C12, and

0.1% by weight to 5% by weight of monoRL-C10C12:1,

wherein the percentages by weight refer to a sum total of all rhamnolipids present,

wherein diRL-C10C12:1 is a di-rhamnolipid of formula (I), in which n=1 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 =an unbranched, unsubstituted hydrocarbon radical having 9 carbon atoms having 1 double bond,

wherein diRL-C10C12 is a di-rhamnolipid of formula (I) and salts thereof, in which n=1 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 ═(CH 2 ) o —CH 3 wherein o=8,

wherein monoRL-C10C12 is a mono-rhamnolipid of formula (I), in which n=0 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 ═(CH 2 ) o —CH 3 wherein o=8,

wherein monoRL-C10C12:1 is a mono-rhamnolipid of formula (I), in which n=0 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 where o=6 and remaining radical R 1 or R 2 =an unbranched, unsubstituted hydrocarbon radical having 9 carbon atoms having 1 double bond,

wherein formula (I) is

wherein

m=1.

11. The composition according to claim 1 , wherein said composition comprises at least one preservative selected from the group consisting of p-anisic acid, levulinic acid, lactic acid, citric acid, and a salt of the aforementioned acids.

12. A method for preparing a formulation of at least one glycolipid, the method comprising:

a) providing a composition comprising

40% by weight to 70% by weight of at least one glycolipid,

2.0% by weight to 14% by weight of triethyl citrate, and

water,

 wherein the percentages by weight refer to the total composition, wherein a weight ratio of all glycolipids to all triethyl citrate comprised in the composition is in a range of from 5:1 to 20:1, and

b) diluting the composition with at least partially water to a formulation comprising 0.2% by weight to 12% by weight of the at least one glycolipid, where the percentages by weight refer to the total formulation.

13. The method according to claim 12 , wherein a pH of the formulation in b) is adjusted to a pH of at 25° C. from 4.5 to 7.0.

14. A method, comprising:

adding triethyl citrate to an aqueous composition containing at least one glycolipid, to stabilize a foam of the aqueous composition, thereby obtaining a stabilized foam of the aqueous composition which comprises

0.2% by weight to 70% by weight of said at least one glycolipid,

0.01% by weight to 14% by weight of said triethyl citrate, and

water,

wherein the percentages by weight refer to the total stabilized foam, wherein a weight ratio of all glycolipids to all triethyl citrate comprised in the stabilized foam is in a range of from 5:1 to 20:1.

15. The composition according to claim 1 , comprising:

0.4% by weight to 55% by weight of the at least one glycolipid, and

0.02% by weight to 11% by weight of triethyl citrate,

wherein the percentages by weight refer to the total composition.

16. The composition according to claim 9 , wherein the composition comprises:

0.1% by weight to 5% by weight of the monoRL-C10C12, and

0.1% by weight to 5% by weight of the monoRL-C10C12:1,

wherein the percentages by weight refer to the sum total of all rhamnolipids present,

wherein monoRL-C10C12 is a mono-rhamnolipid of formula (I), in which n=0 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 wherein o=6 and remaining radical R 1 or R 2 =an (CH 2 ) o —CH 3 wherein o=8,

wherein monoRL-C10C12:1 is a mono-rhamnolipid of formula (I), in which n=0 and one of radicals R 1 and R 2 ═(CH 2 ) o —CH 3 where o=6 and remaining radical R 1 or R 2 =an unbranched, unsubstituted hydrocarbon radical having 9 carbon atoms having 1 double bond,

wherein formula (I) is

wherein

m=1.

17. The composition according to claim 11 , wherein the composition comprises the at least one preservative at a concentration of from 0.01% by weight to 14% by weight, where the percentages by weight refer to the total composition.

18. The method according to claim 12 , wherein the formulation is a cosmetical or pharmaceutical composition.

19. The method according to claim 13 , wherein the pH of the formulation is adjusted in b) by adding an organic or inorganic base.