Effective depilatory article

Patent metadata

Field	Value
Publication number	US-9248085-B2
Application number	US-201213588326-A
Country	US
Kind code	B2
Filing date	Aug 17, 2012
Priority date	Aug 17, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

An aqueous depilatory composition comprising a thioglycolate salt and a fluoride ion source.

First claim

What is claimed is:

1. An aqueous depilatory composition comprising:
i. a thioglycolate salt; and
ii. a fluoride ion source selected from the group consisting of sodium fluoride, potassium fluoride, lithium fluoride, ammonium fluoride, tetrabutylammonium fluoride, tetraethylammonium fluoride, tetramethylammonium fluoride, imidazolium fluoride and mixtures thereof.

2. A depilatory composition according to claim 1 , wherein the aqueous depilatory composition comprises a base in a concentration range of from about 0.1% to about 10.0% by weight of the aqueous depilatory composition.

3. A depilatory composition according to claim 2 , wherein the base comprises a divalent cation.

4. A depilatory composition according to claim 1 , wherein the thioglycolate salt comprises a divalent cation and wherein the concentration of the conjugate acid of the thioglycolate salt is from about 0.5% to about 12.0% by weight of the aqueous depilatory composition.

5. A depilatory composition according to claim 1 , wherein the aqueous depilatory composition comprises water in an amount of at least about 40% by weight of the aqueous depilatory composition.

6. A depilatory article comprising a substrate in physical contact with the aqueous depilatory composition of claim 1 , thereby forming a coated area of the substrate.

7. A depilatory article according to claim 6 , wherein the fluoride ion source is present in the aqueous depilatory composition in an amount per unit area of said coated region of the substrate of from about 2.05×10 −8 mol/cm 2 to about 1.23×10 −4 mol/cm 2 .

8. A depilatory article according to claim 6 , wherein the aqueous depilatory composition comprises monovalent cations in an amount per unit area of the coated region of the substrate of less than about 5.10×10 −4 mol/cm 2 .

9. A depilatory article according to claim 6 , wherein a protective release layer is removably attached to the aqueous depilatory composition.

10. A depilatory article according to claim 6 wherein the depilatory article is a mask, strip or patch.

11. A depilatory article according to claim 6 , wherein the substrate is water impermeable.

12. A depilatory article according to claim 6 , wherein the substrate possesses a rigidity in the range of from about 5.00 g/cm to about 0.08 g/cm.

13. A method of removing hair from the skin, comprising the steps of:
(a) applying a depilatory article according to claim 6 to a surface of skin,
(b) leaving said depilatory article in contact with the skin for a period of greater than 1 minute,
(c) removing said depilatory article from the surface of the skin, and
(d) rubbing, scraping, rinsing or wiping the surface of the skin in the area to which the depilatory article was applied.

14. A depilatory kit, comprising:
(a) at least one depilatory article according to claim 6 ,
(b) optionally, at least one of: a pre-treatment skin care composition, a post-treatment skin care composition or a tool to assist removal of hair and/or aqueous depilatory composition after use, and
(c) packaging for said depilatory kit.

Assignees

• Smith Paul James
• Watts Graeme William
• Rowe Coralie Claude Monique
• Campbell Sarah Jayne
• Dring Neil Charles
• Sagel Paul Albert
• Passi Rajeev Kumar
• Mitra Shekhar
• Broyles Norman Scott
• Procter & Gamble

Inventors

• Smith Paul James
• Watts Graeme William
• Rowe Coralie Claude Monique
• Campbell Sarah Jayne
• Dring Neil Charles
• Sagel Paul Albert
• Passi Rajeev Kumar
• Mitra Shekhar
• Broyles Norman Scott

Classifications

• A61K8/46 Primary

  containing sulfur (A61K8/44 takes precedence) · CPC title

• A61Q9/04

  Depilatories · CPC title

• A61K8/21

  Fluorides; Derivatives thereof · CPC title