Disappearing color sunscreen compositions

• US 6,146,618 A
• Filed: 12/23/1999
• Issued: 11/14/2000
• Est. Priority Date: 08/06/1998
• Status: Expired due to Fees

• Current Assignee: IPA
• Original Assignee: IPA
• Inventors: Bell, Robert, Gray, Denman
• Primary Examiner(s): Dodson, Shelley A.
• Application Number:
  US09/472,390
• Time in Patent Office: 327 Days
• Field of Search: 424/59, 424/60, 424/400, 424/401
• US Class Current: 424/59
• CPC Class Codes: A61K 2800/43 Pigments; Dyes
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/27 Zinc; Compounds thereof
• CPC Class Codes: A61K 8/29 Titanium; Compounds thereof
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Abstract

Sunscreens are colored with oil-soluble dyes approved for use in skin care products (such as sunscreens, lotions, etc.). The color imparted by the dyes substantially disappears shortly after the sunscreen emulsion is applied to skin. This colored sunscreen emulsion includes a oil-soluble phase, at least one sunscreen active agent, water, and an emulsifier. The oil-soluble phase comprises from about 0.0005 to about 0.5 percent by weight of the complete emulsion of at least one oil-soluble dye. The dye imparts a color other than white to the sunscreen emulsion.

The sunscreen active ingredient is provided in an amount effective to protect against the actinic radiation of the sun. Sufficient water is provided to form the colored emulsion. The emulsion additionally contains at least one emulsifier in an amount effective to provide an at least substantially stable emulsion. Other optional ingredients may also be compounded into the sunscreen formulations.

Claims

1. A colored sunscreen composition for application to human skin, comprising:

a sunscreen active to protect the skin from ultraviolet radiation;

an oil-soluble dye to impart a color, other than white, to the composition;

and water, wherein application of the composition to the skin imparts the color to the skin and wherein the color substantially disappears when the composition is rubbed and/or spread onto the skin.

2. A composition according to claim 1, wherein the dye comprises one of the following:

D&

C Green $6, D&

C Red #12, D&

C Violet #2, D&

C Yellow #11, and mixtures thereof.

3. A composition according to claim 1, wherein the dye comprises about 0.0005 to about 0.5 percent by weight of the composition.

4. A composition according to claim 1, wherein the dye comprises about 0.002 to about 0.2 percent by weight of the composition.

5. A composition according to claim 1, wherein the sunscreen active comprises UV-A active, UV-B active, and mixtures thereof.

6. A composition according to claim 1, wherein the active comprises between about 1% to 50% by weight of the composition.

7. A composition according to claim 6, wherein the active comprises between about 1% to 33% by weight of the composition.

8. A composition according to claim 1, wherein the active comprises one of zinc oxide or titanium dioxide.

9. A composition according to claim 1, further comprising an emulsifier to provide a the composition with a substantially stable emulsion.

10. A composition according to claim 9, wherein the emulsifier comprises an oil-in-water emulsifier.

11. A composition according to claim 9, wherein the emulsifier comprises an water-in-oil emulsifier.

12. A composition according to claim 1, further comprising a film-forming polymer.

13. A composition according to claim 1, further comprising an oil-soluble solubilizer.

14. A composition according to claim 1, further comprising a water-insoluble antioxidant.

15. A composition according to claim 1, further comprising an emollient.

16. A composition according to claim 1, further comprising a humectant.

17. A composition according to claim 1, further comprising a dry-feel modifier.

18. A composition according to claim 1, further comprising a waterproofing agent.

19. A composition according to claim 1, further comprising an antimicrobial preservative.

20. A composition according to claim 1, further comprising an antioxidant.

21. A composition according to claim 1, further comprising a cheating agent.

22. A composition according to claim 1, further comprising one or more of an adjuvant, a propellant, a leveling agent, and a dispenser.

23. A composition according to claim 1, further comprising a fragrance.

24. A method of forming a colored sunscreen composition, comprising the steps of:

mixing a sunscreen active with water and an oil-soluble dye to impart a color, other than white, to the composition, wherein application of the composition to the skin imparts the color to the skin and wherein the color substantially disappears when the composition is rubbed and/or spread onto the skin.

25. A colored composition for application to human skin, comprising:

an oil-soluble dye to impart a color, other than white, to the composition;

and water, wherein application of the composition to the skin imparts the color to the skin and wherein the color substantially disappears when the composition is rubbed and/or spread onto the skin.