Oral care composition containing at least one biosurfactant and fluoride

1. An oral care composition comprising from 0.005 wt. % to 20 wt. % of a biosurfactant and a fluoride ion source based on the total weight of the composition, wherein the fluoride ion source is contained in an amount sufficient to supply from 500 to 1500 ppm fluoride ion, based on the total weight of the composition, wherein the biosurfactant is a rhamnolipid and is contained in an amount from 0.1 wt. % to 2 wt. %, based on the total weight of the composition,

wherein the rhamnolipid is a compound of formula (1)

wherein

m is 1,

n is 0 or 1

R 1 and R 2 are an organic radical having from 5 to 13 carbon atoms,

wherein the rhamnolipid comprises from 51% by weight to 75% by weight of diRL-C10C10 and from 0.5% by weight to 2% by weight of monoRL-C10C10,

wherein the weight ratio of the di-rhamnolipids and monorhamnolipids is greater than 90:10, and

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

2. The oral care composition according to claim 1 ,

wherein the rhamnolipids comprise from 0.1% by weight to 25% by weight of diRL-C8C10, wherein the percentages by weight refer to the sum total of all biosurfactant present.

3. The oral care composition according to claim 1 , wherein the fluoride ion source is selected from the group consisting of stannous fluoride, sodium fluoride, potassium fluoride, potassium monofluorophosphate, sodium monofluorophosphate, ammonium monofluorophosphate, sodium fluorosilicate, ammonium fluorosilicate, amine fluorides such as olaflur N′-octadecyltrimethylendiamine-N,N,N′-tris (2-ethanol)-dihydrofluoride and ammonium fluoride.

4. The oral care composition according to claim 1 , wherein the fluoride ion source is contained in an amount sufficient to supply from 100 to 1000 ppm fluoride ion, based on the total weight of the composition.

5. The oral care composition according to claim 1 , rhamnolipid comprises-from 2% by weight to 10% by weight of diRL-C8C10

wherein the weight ratio of the di-rhamnolipids and monorhamnolipids is greater than 98:2.

6. The oral care composition according to claim 1 , comprising from 0.1 wt. % to 2 wt. % of the biosurfactant, wherein the composition reduces formation of insoluble complexes of fluoride,

wherein the rhamnolipid comprises from 51% by weight to 95% 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, wherein the percentages by weight refer to the sum total of all rhamnolipids present, and

wherein the weight ratio of the di-rhamnolipids and monorhamnolipids is greater than 98:2.

7. The oral care composition according to claim 1 , wherein the composition reduces staining of teeth, and wherein the rhamnolipid comprises from 51% by weight to 95% by weight of diRL-C10C10,

from 0.5% by weight to 3% by weight of monoRL-C10C10,

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

from 0.1% by weight to 25% by weight of diRL-C8C10, where the percentages by weight refer to the sum total of all rhamnolipids present, and

wherein the weight ratio of the di-rhamnolipids and monorhamnolipids is greater than 98:2.

8. The oral care composition according to claim 1 , wherein the composition improves deposition/retention of fluoride on teeth, wherein the rhamnolipid comprises

from 51% by weight to 95% by weight of diRL-C10C10,

from 0.5% by weight to 3% by weight of monoRL-C10C10,

from 3% by weight to 12% by weight of diRL-C10C12:1, and

from 2% by weight to 10% by weight of diRL-C8C10,

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

wherein the weight ratio of the di-rhamnolipids and monorhamnolipids is greater than 97:3.

9. The oral care composition according to claim 2 , wherein the fluoride ion source is selected from the group consisting of stannous fluoride, sodium fluoride, potassium fluoride, potassium monofluorophosphate, sodium monofluorophosphate, ammonium monofluorophosphate, sodium fluorosilicate, ammonium fluorosilicate, amine fluorides such as olaflur N′-octadecyltrimethylendiamine-N,N,N′-tris (2-ethanol)-dihydrofluoride and ammonium fluoride.

10. The oral care composition according to claim 2 , wherein the fluoride ion source is contained in an amount sufficient to supply from 200 to 500 ppm fluoride ion, based on the total weight of the composition.

11. The oral care composition according to claim 2 , wherein the biosurfactant is contained in an amount from 0.1 wt. % to 50 wt. %, based on the total weight of the composition.

12. The oral care composition according to claim 3 , wherein the fluoride ion source is contained in an amount sufficient to supply from 200 to 500 ppm fluoride ion, based on the total weight of the composition.

13. The oral care composition according to claim 3 , wherein the biosurfactant is contained in an amount from 0.1 wt. % to 50 wt. %, based on the total weight of the composition.

14. The oral care composition according to claim 4 , wherein the biosurfactant is contained in an amount from 0.1 wt. % to 50 wt. %, based on the total weight of the composition.

15. The oral care composition according to claim 2 , comprising from 0.1 wt. % to 2 wt. % of the rhamnolipid and wherein the fluoride ion source is contained in an amount sufficient to supply from 500 to 1500 ppm fluoride ion.

16. The oral care composition according to claim 5 , wherein the biosurfactant wherein the composition reduces formation of insoluble complexes of fluoride.

17. The oral care composition according to claim 5 , wherein the composition wherein the composition reduces staining of teeth.

18. The oral care composition according to claim 5 , wherein the composition wherein the composition improves deposition/retention of fluoride on teeth.

19. The oral care composition according to claim 1 , wherein R 1 and R 2 are selected from the group consisting of pentenyl, heptenyl, nonenyl, undecenyl and tridecenyl and (CH 2 ) o where o is from 1 to 23.

20. The oral care composition according to claim 5 , wherein R 1 and R 2 are selected from the group consisting of pentenyl, heptenyl, nonenyl, undecenyl and tridecenyl and (CH 2 ) o where o is from 4 to 12.