Stable high internal phase emulsions and compositions comprising the same

• US 20080311058A1
• Filed: 06/18/2007
• Published: 12/18/2008
• Est. Priority Date: 06/18/2007
• Status: Abandoned Application

• Current Assignee: Conopco (Unilever PLC)
• Original Assignee: Conopco (Unilever PLC)
• Inventors: Lips, Alexander, Lou, Anjing, Chandar, Prem
• Application Number:
  US11/820,382
• Publication Number:
  US 20080311058A1
• Time in Patent Office: Days
• US Class Current: 424/59
• CPC Class Codes: A61K 8/06 Emulsions
• 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 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/008 Preparations for oily skin
• CPC Class Codes: A61Q 19/02 for chemically bleaching or whitening the skin
• CPC Class Codes: A61Q 19/08 Anti-ageing preparations

Abstract

High internal phase emulsions and end use compositions made therefrom are described. The high internal phase emulsions have superior stability and sensory characteristics and can be prepared with less than 20% by weight elastomer, an emulsifier and a steric stabilizer characterized as a polyether and/or polyglycerine cross-linked elastomer.

Claims

1. A high internal phase emulsion comprising:

(a) non-emulsifying elastomer;

(b) water;

(c) oil;

(d) emulsifier; and

(e) a steric stabilizer, the steric stabilizer being an elastomer that contributes to a final viscosity, V_f, of the high internal phase emulsion, wherein the high internal phase emulsion in the absence of the steric stabilizer has a stabilizer free viscosity, V_s, further wherein V_f is at least about equal to V_s to no more than about V_s+(V_s×

0.075) and further wherein the high internal phase emulsion is a water-in-oil emulsion comprising at least about 75% by weight water.

2. The emulsion according to claim 1 wherein the non-emulsifying elastomer comprises cyclomethicone, dimethicone or both.

3. The emulsion according to claim 1 wherein the non-emulsifying elastomer is a cross-polymer comprising cyclomethicone and dimethicone.

4. The emulsion according to claim 1 wherein the non-emulsifying elastomer makes up from about 0.05 to about 18% by weight of the emulsion.

5. The emulsion according to claim 1 wherein the oil is silicon-based.

6. The emulsion according to claim 1 wherein the oil makes up from about 0.5 to about 25% by weight of the emulsion.

7. The emulsion according to claim 6 wherein less than about 60% by weight of the oil is provided as carrier for elastomer.

8. The emulsion according to claim 1 wherein the emulsifier has an HLB of less than about 9.

9. The emulsion according to claim 1 wherein the emulsifier is a polyether modified silicone.

10. The emulsion according to claim 1 wherein the emulsifier makes up from about 0.05 to about 12% by weight of the emulsion.

11. The emulsion according to claim 1 wherein the steric stabilizer has a refractive index of greater than about 1.4 at 25°

C.

12. The emulsion according to claim 11 wherein the steric stabilizer is a cross-linked elastomer which is polyether and/or polyglycerine cross-linked.

13. The emulsion according to claim 12 wherein the steric stabilizer comprises dimethicone.

14. The emulsion according to claim 1 wherein the steric stabilizer makes up from about 0.1 to about 25% by weight of the emulsion.

16. The emulsion according to claim 1 wherein the emulsion comprises less than about 20% by weight elastomer.

17. The emulsion according to claim 1 wherein the emulsion comprises less than about 18% by weight elastomer.

18. The emulsion according to claim 1 wherein the emulsion comprises from about 5 to about 13% by weight elastomer.

19. The emulsion according to claim 1 wherein the emulsion is suitable for topical application to the skin.

15. (canceled)

20. A skin care composition comprising a high internal phase emulsion comprising:

(a) non-emulsifying elastomer;

(b) water;

(c) oil;

(d) emulsifier; and

(e) a steric stabilizer, the steric stabilizer being an elastomer that contributes to a final viscosity, V_f, of the high internal phase emulsion, wherein the high internal phase emulsion in the absence of the steric stabilizer has a stabilizer free viscosity, V_s, further wherein V_f is at least about equal to V_s to no more than about V_s+(V_s×

0.075) and further wherein the high internal phase emulsion is a water-in-oil emulsion comprising at least about 75% by weight water.

21. The skin care composition according to claim 20 wherein the skin care composition comprises from about 50 to about 90% by weight water.

22. The skin care composition according to claim 20 wherein the skin care composition comprises from about 50 to about 92% by weight of the high internal phase emulsion.

23. The skin care composition according to claim 20 wherein the skin care composition moisturizes skin, reduces wrinkles on skin, controls oil on skin and/or lightens skin.

24. The skin care composition according to claim 20 wherein the skin care composition further comprises vitamin, antioxidant, dispersant, sunscreen, preservative, emollient, exfolliants, humectants or a mixture thereof.