Skin cleansing composition containing rhamnolipid and siloxane

Patent metadata

Field	Value
Publication number	US-10544384-B2
Application number	US-201615546297-A
Country	US
Kind code	B2
Filing date	Feb 8, 2016
Priority date	Feb 27, 2015
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

The invention provides compositions comprising at least one rhamnolipid and at least one siloxane, characterized in that the weight ratio of rhamnolipid to siloxane is from 5,000,000:1 to 100:1, preferably from 500,000:1 to 1000:1, particularly preferably from 25,000:1 to 2500:1. In another embodiment, the invention provides compositions include rhamnolipid in an amount of from 0.5% by weight to 70% by weight, preferably from 2% by weight to 60% by weight, particularly preferably from 3% by weight to 50% by weight, where the percentages by weight refer to the total composition.

First claim

The invention claimed is:

1. An aqueous skin cleansing composition comprising a rhamnolipid and a siloxane,
wherein the rhamnolipid comprises a rhamnolipid salt comprising rhamnolipid anions and cations selected from the group consisting of Li + , Na + , K + , Mg 2+ , Ca 2+ , Al 3+ , NH 4 + , and triethanolammonium,
wherein the weight ratio of the rhamnolipid to the siloxane is from 25,000:1 to 2,500:1,
wherein the weight ratio of the rhamnolipid to the siloxane is the sum of all the rhamnolipid contained in the composition to the siloxane of all siloxanes contained in the composition,
wherein the composition comprises a mixture of rhamnolipid,
wherein the weight ratio of di-rhamnolipids to mono-rhamnolipids in the mixture is greater than 98:2,
wherein the composition comprises rhamnolipid in an amount of from 12% by weight to 70% by weight, wherein the percentages by weight refer to the total composition and take all rhamnolipid present in the composition, and
wherein the rhamnolipid mixture comprises
from 51% by weight to 95% by weight of diRL-C10C10, and
from 0.5% by weight to 9% by weight of monoRL-C10C10,
where the percentages by weight refer to the sum total of all rhamnolipids present.

2. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises the rhamnolipid in an amount of from 15% by weight to 60% by weight, wherein the percentages by weight refer to the total composition, and
wherein the rhamnolipid mixture comprises
from 70% by weight to 90% by weight of diRL-C10C10,
from 0.5% by weight to 3% by weight of monoRL-C10C10, and
from 0.5% by weight to 15% by weight of diRL-C10C12:1,

where the percentages by weight refer to the sum total of all rhamnolipids present.

3. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises the rhamnolipid in an amount of from 25% by weight to 50% by weight wherein the percentages by weight refer to the total composition.

4. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises a mixture of rhamnolipid, where the weight ratio of di-rhamnolipids to mono-rhamnolipids in the mixture is greater than 51:49.

5. The aqueous skin cleansing composition according to claim 1 , wherein the composition is an aqueous composition and has a pH of from 5.5 to 6.9.

6. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises of rhamnolipid anions in an amount of from 70% by weight to 95% by weight wherein the percentages by weight refer to the total composition.

7. The aqueous skin cleansing composition according to claim 1 , wherein the siloxane is selected from the group consisting of silicone oils, silicone waxes, silicon-functional siloxanes, organofunctional siloxanes, polydiethylsiloxanes, siloxanes having functional groups and organomodified siloxanes.

8. The aqueous skin cleansing composition according to claim 1 , wherein the siloxane is present in an amount of from 0.1 ppm to 5000 ppm by weight of the composition.

9. A formulation comprising the aqueous skin cleansing composition according to claim 1 .

10. The formulation according to claim 9 , wherein the formulation comprises at least one further surfactant.

11. A cleaning surface comprising the aqueous skin cleansing composition according to claim 1 .

12. The aqueous skin cleansing composition according to claim 1 , wherein the rhamnolipid mixture comprises
from 75% by weight to 85% by weight of diRL-C10C10,
from 0.5% by weight to 2% by weight of monoRL-C10C10,
from 0.5% by weight to 15% by weight of diRL-C10C12:1,
where the percentages by weight refer to the sum total of all rhamnolipids present.

13. The aqueous skin cleansing composition according to claim 1 , wherein the rhamnolipid mixture comprises
from 0.5% by weight to 3% by weight of monoRL-C10C12, and
from 0.1% by weight to 5% by weight of monoRL-C10C12:1,
where the percentages by weight refer to the sum total of all rhamnolipids present.

14. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises the rhamnolipid in an amount of from 2% by weight to 60% by weight, where the percentages by weight refer to the total composition.

15. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises the rhamnolipid in an amount of from 20% by weight to 50% by weight, where the percentages by weight refer to the total composition.

16. The composition according to claim 1 , wherein the rhamnolipid mixture comprises
from 0.5% by weight to 2% by weight of monoRL-C10C12, and
from 0.5% by weight to 3% by weight of monoRL-C10C12:1,
where the percentages by weight refer to the sum total of all rhamnolipids present.

17. The aqueous skin cleansing composition according to claim 1 , wherein the composition is an aqueous composition and has a pH of from 5.6 to 6.0.

18. The aqueous skin cleansing composition according to claim 1 , wherein the composition comprises rhamnolipid cations in an amount of from 80% by weight to 90% by weight of all cations present in the composition except H + and H 3 O + .

19. The aqueous skin cleansing composition according to claim 1 , wherein the siloxane is selected from polyethersiloxanes of formula II:
M a M 1 b D c D 1 d T e Q f   Formula II

wherein

a =2-10,
b =0-10,
c =3-500,
d =1.5-15,
e =0-10,
f =0-10,
wherein, a+b≥2 and N=a+b+c+d+e+f≤2050, and b+d≥1
R S2 is selected from the group consisting of alkyl radicals having 1-16 carbon atoms, aryl radicals having 6-16 carbon atoms, H, and OR S4 ,
R S4 is selected from the group consisting of alkyl radicals having 1-16 carbon atoms, aryl radicals having 6-16 carbon atoms, and H,
R S3 is selected from the group consisting of polyether radicals, of the general formula III

wherein
R S5 is selected from the group consisting of alkyl radicals having 1 to 18 carbon atoms which have ether functions, or aryl radicals having 6-18 carbon atoms,
R S6 is selected from the group consisting of R S8 , H, —C(O)R S8 ,
R S7 is selected from the group consisting of divalent organic radicals,
R S8 is selected from the group consisting of alkyl radicals having 1-16 carbon atoms and aryl radicals having 6-16 carbon atoms,
wherein
h=0 or 1,
i=0-50,
j=0-50,
k=0-50,
l=0-40,
wherein i+j+k+1≥3.

20. The aqueous skin cleansing composition according to claim 1 , wherein the siloxane is present in an amount of from 1 ppm to 500 ppm by weight of the composition.

Assignees

• Evonik Degussa Gmbh

Inventors

• Scheuermann Ralph
• Pickl Marcel
• Ferenz Michael
• Henning Wenk Hans
• Schilling Martin
• Brandt Kathrin Daniela
• Dahl Verena

Classifications

• A61K8/894

  modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol · CPC title

• C11D1/82

  Compounds containing silicon · CPC title

• A61Q19/10

  Washing or bathing preparations · CPC title

• C11D1/83

  Mixtures of non-ionic with anionic compounds · CPC title

• C11D1/06

  Ether- or thioether carboxylic acids · CPC title