Compositions and methods for imparting a sunless tan with functionalized adjuvants

• US 8,398,959 B2
• Filed: 11/29/2011
• Issued: 03/19/2013
• Est. Priority Date: 12/06/2010
• Status: Active Grant

• Current Assignee: Conopco (Unilever PLC)
• Original Assignee: Conopco (Unilever PLC)
• Inventors: Yang, Xiaoxia, Zhu, Jun-Cheng
• Primary Examiner(s): Sullivan, Daniel
• Assistant Examiner(s): BREDEFELD, RACHAEL EVA
• Application Number:
  US13/305,961
• Publication Number:
  US 20120141393A1
• Time in Patent Office: 476 Days
• Field of Search: 424/59
• US Class Current: 424/59
• CPC Class Codes: A61K 8/35 Ketones, e.g. benzophenone
• CPC Class Codes: A61K 8/4913 having five membered rings, e.g. pyrrolidone carboxylic acid
• CPC Class Codes: A61K 8/492 having condensed rings, e.g. indol
• CPC Class Codes: A61Q 19/04 for chemically tanning the skin topical sun or radiation screening or tanning preparations A61Q17/04

Abstract

Described are compositions and methods for imparting a sunless tan with functionalized adjuvants and a tanning agent like dihydroxyacetone. The functionalized adjuvants are pyrrole and/or indole derivatives functionalized with a substituent comprising a carbonyl group.

Claims

1. A composition comprising:

a.) a sunless tanning agent, wherein the sunless tanning agent comprises dihydroxyacetone; and

b.) an adjuvant for the sunless tanning agent, wherein the adjuvant is 1-methyl-2-pyrrolecarboxylic acid, 1H-indole-2-carboxylic acid, pyrrole-2-carboxylic acid, or a mixture thereof.

2. The composition according to claim 1 wherein the sunless tanning agent makes up from 0.025 to 35% by weight of the composition.

3. The composition according to claim 1 wherein the adjuvant makes up from 0.025 to 35% by weight of the composition.

4. The composition according to claim 1 wherein the composition is an emulsion.

5. The composition according to claim 1 wherein the sunless tanning agent makes up from 0.05 to 15% by weight of the composition and the adjuvant makes up from 0.05 to 15% by weight of the composition.

6. The composition according to claim 1 wherein the composition further comprises preservatives, thickening agents, fragrance, cationic ammonium compound, humectant, substituted urea, vitamin or a mixture thereof.

7. The composition according to claim 1 wherein the composition is a cream or lotion.

8. The composition according to claim 1, wherein the adjuvant is a salt.

9. A method for imparting a sunless tan to skin comprising the step of applying to skin the composition of claim 1.