In-shower and bath compositions

• US 8,425,882 B2
• Filed: 04/01/2008
• Issued: 04/23/2013
• Est. Priority Date: 04/01/2008
• Status: Active Grant

• Current Assignee: Conopco (Unilever PLC)
• Original Assignee: Conopco (Unilever PLC)
• Inventors: Lou, Anjing, Qiu, Qiang, Lips, Alexander
• Primary Examiner(s): Eashoo, Mark
• Assistant Examiner(s): ASDJODI, MOHAMMADREZA
• Application Number:
  US12/060,437
• Publication Number:
  US 20090247445A1
• Time in Patent Office: 1,848 Days
• Field of Search: 510/123, 424/59, 424/401
• US Class Current: 424/59
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/86 Polyethers
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations

Abstract

In-the-shower or in-the-bath compositions having a high internal phase emulsion are described. The high internal phase emulsion is a water-in-oil emulsion where active is present in the water phase. The compositions have an initial viscosity which is low and they are suitable to thicken when being applied in the presence of water.

Claims

1. A high internal phase water-in-oil emulsion, HIPE, consisting essentially of:

(a) water;

(b) emulsifier having an HLB of less than 9;

(c) from about 0.1 to about 25% by weight steric stabilizer, the steric stabilizer being polyethylene glycol or polyglycerine cross-linked elastomer having a chain length from about 8 to about 26 carbon atoms;

(d) from about 0.25 to about 20% by weight depletion stabilizer, the depletion stabilizer being an alkyl modified cross-linked elastomer having a polyethylene glycol or polyglycerine crosslinking group with a chain length from about 8 to about 26 carbon atoms; and

(e) oil comprising D₄, D₅, D₆ cyclodimethicone or a mixture thereof

wherein the HIPE thickens when being topically applied in the presence of water and is capable to carry and deliver an active while showering or bathing and further wherein the emulsion is substantially free of non-emulsifying elastomer and comprises a water droplet size that is from about 10 to about 15 times smaller than about 40 to about 50 microns during topical application.

2. The emulsion according to claim 1 wherein the emulsion further comprises in its water phase an active suitable to enhance a skin characteristic.

3. The emulsion according to claim 2 wherein the active is dihydroxyacetone, glycerin, vitamin, a sugar derivative, natural extract, or a mixture thereof.

4. The high internal phase water-in-oil emulsion according to claim 1 wherein the water phase is suitable to absorb water.

5. An in-the-shower or in-the-bath composition comprising:

(a) a high internal phase water-in-oil emulsion consisting essentially of;

(i) water;

(ii) emulsifier having an HLB of less than 9;

(iii) from about 0.1 to about 25% by weight steric stabilizer, the steric stabilizer being polyethylene glycol or polyglycerine cross-linked elastomer having a chain length from about 8 to about 26 carbon atoms;

(iv) from about 0.25 to about 20% by weight depletion stabilizer, the depletion stabilizer being an alkyl modified cross-linked elastomer having a polyethylene glycol or polyglycerine crosslinking group with a chain length from about 8 to about 26 carbon atoms; and

(v) oil comprising D₄, D₅ or D₆ cyclodimethicone or a mixture thereof, and

(b) active

wherein the composition thickens when being topically applied in the presence of water and the high internal phase water-in-oil emulsion, HIPE, is capable to carry and deliver active while showering or bathing and further wherein the composition is substantially free of non-emulsifying elastomer and the emulsion comprises a water droplet size that is from about 10 to about 15 times smaller than about 40 to about 50 microns during topical application.

6. The composition according to claim 5 wherein the active is present in the water of the emulsion.

7. The composition according to claim 5 wherein the composition comprises resorcinol, retinoid, conjugated linoleic acid, petroselinic acid or a mixture thereof in the water, oil or both.

8. The composition according to claim 5 wherein the composition comprises dihydroxyacetone, vitamin, sugar derivative, hydroxcarboxylic acid, natural extract or a mixture thereof in the water of the emulsion.

9. The composition according to claim 5 wherein the emulsion makes up at least about 85% by weight of the composition.

10. The composition according to claim 5 wherein the emulsion makes up form about 88 to about 96% by weight of the composition.

11. The composition according to claim 5 wherein the water of the emulsion comprises humectant.

12. The composition according to claim 11 wherein the humectant is glycerin.

13. The composition according to claim 5 wherein the composition has an initial viscosity of less than about 6,000 cps and a viscosity greater than about 6,500 to about 125,000 cps during application.

14. The composition according to claim 5 wherein water is absorbed by the water phase in the water-in-oil HIPE of the composition during application while showering or bathing.

15. The composition according to claim 14 whereby the absorbed water has a droplet diameter size when the composition is being applied from about 2.5 to about 15 microns.

16. The composition according to claim 5 wherein the composition has water droplets that are from about 40 to about 150 microns before application and from about 5 to about 20 microns during application.

17. The composition according to claim 5 wherein the composition has a capillary number from about 1 to about 1.6.

18. The composition according to claim 5 wherein the composition has a contact angle of less than about 100°

against water.

19. A method for delivering active to a consumer comprising the step of applying the composition of claim 5 to skin of the consumer while bathing or showering.

20. The method according to claim 19 wherein the active is DHA, niacinamde, moisturizing agent or mixtures thereof.

21. The composition according to claim 5 wherein the active is DHA, niacinamide, moisturizing agent or mixtures thereof.

22. The composition according to claim 5 wherein the emulsion is at least about 73% water when deplete of active and the emulsion with active makes up at least about 80% by weight of the total weight of the in-the-shower or the in-the-bath composition and further wherein the emulsion comprises a water droplet size that is from about 10 to about 15 times smaller than about 40 to about 50 microns during topical application.