A Tanning Composition

Abstract

A composition comprising 5 to 30% w/w skin tanning agent, 5 to 30% w/w oil, 1 to % w/w emulsifying and stabilizing agent, 7 to 15% w/w anionic surfactant, and water.

Claims

1. A composition comprising: 5 to 30% w/w skin tanning agent; 5 to 30% w/w oil; 1 to 5% w/w emulsifying and stabilizing agent; 7 to 15% w/w anionic surfactant; and water.

2. The composition of claim 1, wherein the skin tanning agent is dihydroxyacetone.

3. The composition of claim 1 or claim 2, wherein the skin tanning agent is present in the composition in an amount of 15 to 23% w/w.

4. The composition of any one of claims 1 to 3, wherein the oil is present in an amount of 8 to 20% w/w.

5. The composition of any one of claims 1 to 4, wherein the oil comprises a natural fruit based oil, mineral oil, silicone oil or combination thereof.

6. The composition of claim 5, wherein the natural fruit based oil is selected from sweet almond oil, sunflower oil, apricot kernel oil, avocado oil, babassu oil, coconut oil, brazil nut oil, olive oil, sesame oil, hemp oil, marula oil, jojoba oil, peach kernel oil, papaya seed oil, grape seed oil and combinations thereof.

7. The composition of claim 5, wherein the silicone oils is selected from dimethicone, cyclopentasiloxane, cyclomethicon, amodimethicone, dimethiconol, phenyl trimethicone, siloxane, cyclohexasiloxane, peg-12 dimethicone and combinations thereof.

8. The composition of any one of claims 1 to 7, wherein the emulsifying and stabilising agent is present in an amount of 2 to 4% w/w.

9. The composition of any one of claims 1 to 8, wherein the emulsifying and stabilising agent comprises a wax, polymer or combination thereof.

10. The composition of claim 9, wherein the emulsifying and stabilising agent comprises a crosslinked polymer or a copolymer, the crosslinked polymer or copolymer being comprised of monomers of at least one of acrylic acid, sodium acrylate, methacrylic acid or alkyl acrylate.

11. The composition of claim 9, wherein the emulsifying and stabilising agent is selected from acrylates/C.sub.10-30 alkyl acrylate crosspolymer, acrylates crosspolymer, carbomer, acrylates copolymer, sodium acrylate/sodium acryloyldimethyl taurate copolymer, acrylates/steareth-20 methacrylate copolymer, mixtures of fatty alcohols, esterification of materials and polyethylene glycol ethers.

12. The composition of any one of claims 1 to 11, wherein the anionic surfactant is present in an amount of 8 to 13% w/w.

13. The composition of any one of claims 1 to 12, wherein the anionic surfactant comprises a carboxylate, a sulphate, a sulfosuccinate or a combination thereof.

14. The composition of claim 13, wherein the anionic surfactant is selected from sodium lauryl glucose carboxylate, sodium laureth sulphate, sodium myreth sulphate, ammonium lauryl sulphate, diethylhexyl sodium sulfosuccinate, disodium laureth sulfosuccinate and disodium lauryl sulfosuccinate.

15. The composition of any one of claims 1 to 14 further comprising an amphoteric surfactant.

16. The composition of claim 15, wherein the amphoteric surfactant is present in an amount of 3 to 10% w/w.

17. The composition of claim 15 or claim 16, wherein the amphoteric surfactant is selected from capryl/capram idopropyl betaine, cocamidopropyl betaine and sodium lauriminodipropionate.

18. The composition of any one of claims 1 to 17 further comprising a non-ionic surfactant.

19. The composition of claim 18, wherein the non-ionic surfactant is present in an amount of 1 to 9% w/w.

20. The composition of claim 18 or claim 19, wherein the non-ionic surfactant is selected from lauryl glucoside, decyl glucoside, caprylyl/capryl glucoside and coco-glucoside.

21. The composition of any one of claims 1 to 20 further comprising an emollient or penetration enhancer.

22. The composition of claim 21, wherein the emollient or penetration enhancer is present in the composition in an amount of up to 2% w/w.

23. The composition of claim 21 or claim 22, wherein the emollient or penetration enhancer is a jojoba ester.

24. The composition of any one of claims 1 to 23 further comprising from 0.05 to 3% w/w of a supplementary tanning agent.

25. The composition of claim 24, wherein the supplementary tanning agent is erythrulose or melanin.

26. The composition as defined in any one claims 1 to 25 for use as or in a sunless or self-tanning product.

27. The composition as defined in any one claims 1 to 25 for use in the shower or as a shower product.

28. A sunless or self-tanning product comprising the composition as defined in any one of claims 1 to 25.

29. A shower product comprising the composition as defined in any one of claims 1 to 25.

30. A method of delivering a tanning agent to the skin of a user comprising the steps of: i) applying a composition as defined in any one of claims 1 to 25 to the skin, and ii) allowing the composition to remain in contact with the skin for up to 6 minutes.

31. The method of claim 30 wherein the composition is allowed to remain in contact with the skin for 1 to 6 minutes.

32. The method as defined in claim 30 or 31 further comprising subjecting skin to exposure to warm water, for example by showering, before applying the composition.

33. A sunless or self-tanning product comprising a skin tanning agent, wherein the product provides a difference in skin colour of E>2 measured by a Cortex Colormetera when the product is applied to the skin and allowed remain in contact with the skin for up to 6 minutes, for example for 1 to 6 minutes.

34. A product as defined in claim 33 for use in the shower or as a shower product.

35. A method of delivering a tanning agent to the skin of a user comprising the steps of: i) applying a composition as defined in claim 33 to the skin, and ii) allowing the composition to remain in contact with the skin for up to 6 minutes, for example from 1 to 6 minutes.

36. The method as defined in claim 35 further comprising subjecting skin to exposure to warm water, for example by showering, before applying the composition.

37. A composition substantially as described herein.

38. A method of delivering a tanning agent to the skin substantially as described herein.

Description

[0125] Embodiments of the present invention will now be described, purely by way of example, with reference to the accompanying drawings, in which:

[0126] FIG. 1illustrates the results of a study in which example compositions of the invention were tested in a panel of 20. The graph shows the colour measurement AE value per number of uses of the compositions.

EXAMPLE

[0127] Compositions according to the invention were tested in a controlled panellist study using the following application method:

[0128] All panellists showered in their normal manner using a standard gel. A panel of 20 were then randomly split into two equal groups. The allocation of test materials was randomised to eliminate position and order bias by a computer system which produces a Randomised Product Application Schedule for each subject on the study.

[0129] Test compositions A and B were prepared and tested.

TABLE-US-00001 Test composition A Test composition B Dihydroxyacetone (DHA) 21-23% 18-22% Almond Oil 14-16% 14-16% DiethylHexylSulfosuccinate 9-11% 9-11% CocamidoPropylBetaine 4-5% 4-5% Melanin 0-0.3% Hydrolyzed Jojoba Esters 0.1-1.0% Decyl Glucoside 2.5-3.0% 2.5-3.0%

[0130] Half the panel then applied the test composition A to one leg and a standard shower gel (control) to the other legboth products were then lathered and showered (rinsed) off in the normal manner and towel dried.

[0131] The other half of the panel applied the test composition B to one leg and a standard shower gel (control) to the other legboth products were then lathered and showered (rinsed) off in the normal manner and towel dried.

[0132] Test compositions A and B were applied and left on skin for 3 minutes. The test and control compositions were applied in a circular motion and massaged into wet skin, creating an even coverage. After application, panellists washed their hands concentrating on their palms, nails and in-between fingers to avoid staining. After 3 minutes, panellists stepped back into the shower to lather up and rinse off the test and control compositions.

[0133] The study was carried out over 7 days with the test product applied on 5 occasions.

[0134] Skin colour was assessed visually by trained assessors and also using a Cortex Colormeter which uses the L*a*b* numerical system to quantify colour of the skin. This is a system commonly used for colour measurement, and gives a measure of tone, intensity and luminosity. Differences in colour produced by the composition were measured tracking changes in a* and b* which quantify tone/intensity and L which quantifies luminosity.

[0135] To demonstrate the overall impact on colour the combination parameter, E was used:

E=a*2+b*2+L2

[0136] E values are commonly used to quantify colour differences in many industries, most people can typically detect a difference in E of 2 units.

[0137] As can be seen in FIG. 1, most panellists showed a difference in E>2 after the first application. This value is commonly accepted as the visual detection limit.

[0138] The above compositions provide a cosmetically acceptable sunless or self-tanning product. The compositions are particularly applicable for use in the shower. The compositions deliver the DHA to the skin and allow it to produce the desired colouring effect on the skin within the showering regime.