Kit and Method for Removing Hair

• US 20110232006A1
• Filed: 03/24/2011
• Published: 09/29/2011
• Est. Priority Date: 03/26/2010
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Watson, Andrew David, Goffe, Michael John, Hewlins, Stuart Andrew, Smith, Charles Robert
• Application Number:
  US13/070,820
• Publication Number:
  US 20110232006A1
• Time in Patent Office: Days
• US Class Current: 8/161
• CPC Class Codes: A61K 2800/884 Sequential application
• CPC Class Codes: A61K 8/31 Hydrocarbons
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61K 8/922 of vegetable origin
• CPC Class Codes: A61K 8/927 of insects, e.g. shellac
• CPC Class Codes: A61Q 9/04 Depilatories

Abstract

A method of removing hair from skin, preferably facial skin, is provided, comprising the steps of:

• • (a) applying a hydrophobic protective composition to an area of skin, preferably facial skin, on which unwanted hair is growing, the hydrophobic protective composition having a thermal transition from solid to liquid within the range from −60° C. to 80° C., wherein the enthalpy of thermal transition (ΔH_{f(20-50° C.)}) measured within the range from 20° C. to 50° C. represents from 10% to 50% of the total enthalpy of thermal transition (ΔH_f) in the range from −60° C. to 80° C.;
  • (b) applying a depilatory composition to the area of skin to which the hydrophobic protective composition has been applied, the depilatory composition comprising a keratin reducing agent.

Claims

1. A method of removing hair from skin facial skin, comprising the steps of:

(a) applying a hydrophobic protective composition to an area of skin on which unwanted hair is growing, the hydrophobic protective composition having a thermal transition from solid to liquid within the range from about −

60°

C. to about 80°

C., wherein the enthalpy of thermal transition (Δ

H<sub>f(20-50°

C.)</sub>) measured within the range from about 20°

C. to about 50°

C. represents from about 10% to about 50% of the total enthalpy of thermal transition (Δ

H_f) in the range from about −

60°

C. to about 80°

C.;

(b) applying a depilatory composition to the area of skin to which the hydrophobic protective composition has been applied, the depilatory composition comprising a keratin reducing agent.

2. The method of claim 1, wherein the amount of hydrophobic protective composition applied to the skin is from about 0.3-about 2 mg/cm².

3. The method of claim 1, wherein the depilatory composition is applied as a layer to the skin which has been pre-treated with hydrophobic protective composition, wherein the layer has a thickness from about 0.1 mm to about 5 mm.

4. The method of claim 1, comprising the following additional step between step (a) and step (b):

(a1) massaging the hydrophobic protective composition into the skin for at least about 10 seconds.

5. The method of claim 1, comprising the following additional step immediately following step (b):

(c) leaving the depilatory composition in place on the hydrophobic protective composition for a period of at least about 1 minute.

6. The method of claim 1, comprising the following additional step immediately following step (c):

(d) removing both the hydrophobic protective composition and the depilatory composition from the skin by scraping, wiping or rubbing it off.

7. The method of claim 1, wherein the hydrophobic protective composition comprises from about 1% to about 60% of wax by weight of the hydrophobic protective composition.

8. The method of claim 1, wherein the hydrophobic protective composition comprises from about 3% to about 15% of wax by weight of the hydrophobic protective composition.

9. The method of claim 1, wherein the hydrophobic protective composition comprises from about 20% to about 99% of triglyceride by weight of the hydrophobic protective composition.

10. The method of claim 1, wherein the hydrophobic protective composition comprises from about 75% to about 99% of triglyceride by weight of the hydrophobic protective composition.

11. The method of claim 1, wherein the hydrophobic protective composition comprises a homogenous mixture of triglyceride and from about 0.5% to about 3% wax by weight of the hydrophobic protective composition and wherein the weight ratio of wax:

triglyceride is about 1;

8 to about 1;

25.

12. A method of removing hair from skin facial skin, comprising the steps of:

(a) applying a hydrophobic protective composition to an area of skin on which unwanted hair is growing, the hydrophobic protective composition having a thermal transition from solid to liquid within the range from about −

60°

C. to about 80°

C., wherein the enthalpy of thermal transition (Δ

H<sub>f(20-50°

C.)</sub>) measured within the range from about 20°

C. to about 50°

C. represents from about 10% to about 50% of the total enthalpy of thermal transition (Δ

H_f) in the range from about −

60°

C. to about 80°

C.;

(a1) massaging the hydrophobic protective composition into the skin for at least about 10 seconds;

(b) applying a depilatory composition to the area of skin to which the hydrophobic protective composition has been applied, the depilatory composition comprising a keratin reducing agent.

(c) leaving the depilatory composition in place on the hydrophobic protective composition for a period of about 3 to about 10 minutes.

(d) removing both the hydrophobic protective composition and the depilatory composition from the skin.

13. A depilatory kit comprising:

(a) a hydrophobic protective composition, the hydrophobic protective composition having a thermal transition from solid to liquid within the range from about −

60°

C. to about 80°

C., wherein the enthalpy of thermal transition (Δ

H<sub>f(20-50°

C.)</sub>) measured within the range from about 20°

C. to about 50°

C. represents from about 10% to about 50% of the total enthalpy of thermal transition (Δ

H_f) in the range from about −

60°

C. to about 80°

C.;

(b) a depilatory composition comprising an effective amount of a keratin reducing agent.

14. The depilatory kit of claim 13, wherein the hydrophobic protective composition comprises from about 1% to about 60% of wax by weight of the hydrophobic protective composition.

15. The depilatory kit of claim 13, wherein the hydrophobic protective composition comprises from about 3% to about 15% of wax by weight of the hydrophobic protective composition.

16. The depilatory kit of claim 13, wherein the hydrophobic protective composition comprises from about 20% to about 99% of triglyceride by weight of the hydrophobic protective composition.

17. The depilatory kit of claim 13, wherein the hydrophobic protective composition comprises from about 75% to about 99% of triglyceride by weight of the hydrophobic protective composition.

18. The depilatory kit of claim 13, wherein the depilatory composition is in the form of a cream or lotion, or is disposed on a substrate.

19. The depilatory kit of claim 13, additionally comprising a tool selected from the group consisting of a scraper, a spatula and a wipe.

20. The depilatory kit of claim 13, additionally comprising the following instructions:

(a) An instruction to apply the hydrophobic protective composition over an area of skin to be depilated;

(b) An instruction to massage the hydrophobic protective composition into the area of skin to be depilated for at least about 10 seconds;

(c) An instruction to apply the depilatory composition to the pre-treated area of skin to be depilated.

21. The depilatory kit of claim 20, additionally comprising the following instruction:

(d) An instruction to leave the depilatory composition in place on top of the hydrophobic protective composition for a period of at least about 1 minute;

22. The depilatory kit of claim 21, additionally comprising the following instruction:

(e) An instruction to remove both the hydrophobic protective composition and the depilatory composition from the skin, by scraping, wiping or rubbing it off.

23. The depilatory kit of claim 22, additionally comprising the following instruction:

(f) An instruction to treat the area of skin which has been depilated with a post-treatment skin care composition.