Claims
- 1. A colored sunscreen composition exhibiting both UV absorption and skin coloring properties, the colored sunscreen composition comprising a colored nanostructure, the colored nanostructure comprising a particulate sunblock agent in intimate relationship with a coloring agent or a colored polymeric nanomatrix and being reactive to skin or capable of being immobilized onto the skin.
- 2. A colored nanostructure comprising a particulate sunblock agent chemically attached to a coloring agent, and wherein the colored nanostructure is reactive to skin or capable of being immobilized onto the skin.
- 3. A colored nanostructure comprising a particulate sunblock agent in intimate relationship with a colored polymeric nanomatrix, wherein the colored polymeric nanomatrix comprises a coloring agent chemically attached to a polymeric nanomatrix, and wherein the colored nanostructure is reactive to skin or capable of being immobilized onto the skin.
- 4. A colored nanostructure according to claim 3 wherein the particulate sunblock agent is chemically attached to the colored polymeric nanomatrix.
- 5. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix comprises a particulate polymeric nanomatrix.
- 6. A colored nanostructure according to claim 5 wherein the particulate polymeric nanomatrix is a protein or a protein derivative.
- 7. A colored nanostructure according to claim 6 wherein the protein or protein derivative is further grafted with silicone.
- 8. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix comprises a non-particulate polymeric nanomatrix.
- 9. A colored nanostructure according to claim 8 wherein the non-particulate polymeric nanomatrix is selected from the group consisting of a linear polymer, a graft copolymer, a comb polymer, a branched polymer, a highly branched polymer, a star polymer, a dendrimer, and a lightly crosslinked polymer network.
- 10. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix comprises silicone.
- 11. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix comprises amphiphilic block copolymers.
- 12. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix is in the form of a nanoscopic polymer network.
- 13. A colored nanostructure according to claim 3 wherein the colored polymeric nanomatrix is in the form of a polymer nanosphere.
- 14. A colored nanostructure according to claim 3 wherein the coloring agent comprises melanin.
- 15. A colored nanostructure according to claim 3 wherein the composition further comprises an organic UV absorber chemically attached to the particulate sunblock agent or to the colored polymeric nanomatrix.
- 16. A colored nanostructure according to claim 3 which comprises skin-reactive functional groups.
- 17. A colored nanostructure according to claim 3 which comprises a polymer exhibiting UCST or LCST behavior in a physiologically acceptable aqueous solution.
- 18. A colored nanostructure according to claim 3 which comprises functional groups that will react with a mordant.
- 19. A colored nanostructure according to claim 3 which comprises functional groups that will react with a cationic fixing agent.
- 20. A colored nanostructure according to claim 3 which comprises functional groups that will react with an anionic fixing agent.
- 21. A colored nanostructure according to claim 3 which comprises functional groups that will react with a fixing agent that relies on hydrophobic interactions or on hydrogen bonding.
- 22. A method of treating skin to provide improved retention of sunblock and coloring agents on the skin, the method comprising:
applying a colored sunscreen composition to the skin under a first set of conditions, the colored sunscreen composition comprising a colored nanostructure, the colored nanostructure comprising a particulate sunblock agent in intimate relationship with a coloring agent or a colored polymeric nanomatrix and being reactive to skin or capable of being immobilized onto the skin; and changing the conditions to a second set of conditions such that the colored nanostructure is attached to or immobilized onto the skin.
Parent Case Info
[0001] The present invention is a continuation of co-pending International Patent Appln. No. PCT/US02/18277, filed Jun. 6, 2002 and designating the United States of America, which application claims the benefit of Provisional U.S. patent application Ser. No. 60/297,155, filed Jun. 8, 2001; the entire disclosures of both of which are incorporated herein by reference.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60297155 |
Jun 2001 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/US02/18277 |
Jun 2002 |
US |
Child |
10721442 |
Nov 2003 |
US |