Sunless tanning cream

Details Sunless tanning cream Sunless tanning cream

2001-07-16

2003-10-07

Dodson, Shelley A. (Department: 1616)

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

C514S675000

Reexamination Certificate

active

06630130

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to a sunless tanning cream effective as a self tanning formulation and in camouflaging the effects of vitiligo on human skin.
Millions of people desire efficacious products to camouflage skin imperfections as well as the effects of leukodermic conditions such as vitiligo. In addition, many of the same people also want tanned skin. Despite the well documented negative effects of long-term exposure to ultraviolet light, global populations generally equate tanned skin with health and affluence. Present sunless tanning products have proven inadequate to serve the above needs of consumers, particularly African American consumers, due to inadequate match of skin tone and poor functional longevity.
It would be advantageous to provide a sunless tanning cream that effectively provides the appearance of tanned skin without having to go into the sun. It would be even more advantageous if such a cream would produce an immediate tanned appearance and last for an extended period of time.
Furthermore, it is desirable that such a sunless tanning cream, in addition to effectively tanning healthy skin of people in the general population, would also effectively camouflage the unsightly effects of vitiligo. Vitiligo is a chronic depigmentation disorder that causes unsightly white patches or splotches on the patient's skin. These splotches are caused by localized depigmentation at discrete sites over the skin surface. Vitiligo affects people of all ethnicities and races. However, its effects are particularly pronounced in African American patients due to the high contrast between their natural brown or black skin and the bright white splotches characteristic of vitiligo.
While the patient suffers no debilitating effects from vitiligo, it often can have a negative psychological impact, particularly in African Americans for the above reason. Consequently, a number of creams have been developed primarily comprised of a makeup base which do not medically treat the vitiligo, but are designed to mask its effects by camouflaging the depigmented splotches.
However, current makeup-based creams, e.g. Dermablend, Coverblend, and Dermacolor, suffer from a number of drawbacks in their application. Specifically, existing creams mask white splotches for only limited periods of time before washing or rubbing off. Consequently, such creams must be applied at least daily to provide any lasting benefit to the wearer. In addition, existing creams have an objectionable feel on the skin which is unpleasant to the touch. Existing creams also tend not to be well matched to the various skin tones of African American vitiligo patients.
Consequently, there is a need in the art for a sunless tanning cream that provides a lasting tanned appearance, and that successfully masks the effects of vitiligo for an extended period of time in a manner that cannot be washed or rubbed off. Preferably, such a cream would not be objectionable to the touch, and would be well matched to the skin tone of the wearer, particularly for African Americans.
SUMMARY OF THE INVENTION
A sunless tanning formulation is provided which comprises a non-makeup cosmetic and a coloring system. The coloring system comprises a makeup. The non-makeup cosmetic is effective to darken the epidermis via a chemical reaction. Also provided is a sunless tanning formulation that is effective to camouflage the effects of vitiligo when applied to skin. The formulation is a water-in-oil emulsion having an inner water phase and an outer oil phase, and comprises an effective amount of dihydroxyacetone, a coloring system comprising oil-soluble and water-soluble coloring agents, an emulsifying system effective to provide a water-in-oil emulsion, and a solvent system comprising silicone-based solvents.
A method of camouflaging the effects of vitiligo is also provided. The method comprises the step of applying an effective amount of DHA to a depigmented splotch on a patient's skin.
A method of providing the appearance of tanned skin is also provided. The method comprises step of applying a sunless tanning preparation to the skin, wherein the preparation has a makeup and dihydroxyacetone. The makeup provides an immediate coloring effect yielding the appearance of tanned skin, while the dihydroxyacetone undergoes a chemical reaction with the epidermis to provide a lasting appearance of tanned skin after the makeup has washed away.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION
As used herein, when a range such as 5-25 or between 5 and 25 is given, this means preferably at least 5 and, separately and independently, preferably not more than 25. Also as used herein, “cosmetic” means any component or substance that improves the general appearance of skin, thus yielding a “cosmetic effect.” A “cosmetic effect” means the effect of improved skin appearance through application or use of a “cosmetic.”
As used herein, the term “makeup” means a cosmetic in the form of a pigment, dye, or other colored material, whose sole function is to create the appearance of color when applied to the skin, the apparent color being that of the “makeup” itself. As used herein, “non-makeup cosmetic” means a cosmetic that is not in the form of a pigment, dye, or other similar colored material that creates the appearance of color when applied to the skin, the apparent color being that of the pigment, dye or other similar colored material.
The invented formulation is provided preferably in the form of a cream, less preferably as a gel, spray or aerosol, less preferably in some other known form applicable to the skin. The formulation is effective in camouflaging the unsightly white splotches characteristic of vitiligo, particularly in African American patients. The formulation is dispensed preferably from a soft tube, less preferably from a jar, bottle, pump, can, spray can or spray bottle, less preferably from some other known container.
The invented formulation has the preferred compositions of components shown in table 1 below. It should be noted that table 1 defines four separate preferred embodiments of the invention. The four preferred embodiments differ in the color of their respective cosmetic effects (light brown, brown, dark brown, and honey), with each of the preferred embodiments differing primarily in the most preferred concentrations of the coloring system components. The four preferred formulations are substantially similar in other respects. In table 1, any preferred or less preferred weight percent or weight percent range of any component can be combined with any preferred or less preferred weight percent or weight percent range of any of the other components; it is not required or necessary that all or any of the weight percents or weight percent ranges come from the same column. The column labeled “Phase” refers to the preferred order and method of mixing the components, and is explained in detail below. Unless otherwise specified, all concentrations are weight percents.
TABLE 1
Colored formulation
Preferred
Preferred
Component
Trade
Preferred
(Light
Preferred
(Dark
Less
Less
Phase
System
Ingredient
Name
(Honey)
Brown)
(Brown)
Brown)
Preferred
Preferred
A
Solvent
Cyclopentasiloxane/
SF 1528
8
8
8
8
  4-15
0.5-30
Dimethicone Copolyol
A
Solvent
Cyclometicone
DC-245
5
5
5
5
  1-15
0.5-30
A
Solvent
Diisodecyl Adipate
Trivent
5
5
5
5
  1-15
0.5-30
DIDA
A
Solvent
Dimethicone
DC-200
1
1
1
1
 0.7-10
0.5-30
A
Emulsifying
Dimethicone Copolyol
Siliconyl
0.4
0.4
0.4
0.4
0.2-5
0.1-10
Beeswax
Beeswax
A
Solvent
Hydrogenated Castor
Castor Wax
1
1
1
1
0.2-4
0.1-10
Oil
MP70
A
Emulsifying
PEG-30
Arlacel
0.5
0.5
0.5
0.5
0.2-4
0.1-10
Dipolyhydroxystearate
P-135
A
Emulsifying
Sorbitan Isostearate
—
0.3
0.3
0.3
0.3
0.2-4
0.1-10
A
Coloring
D&C Violet #2
—
0.4
0.49
0.5
0.75
0.1-3
0.01-5 
(1% in mineral oil)
A
Coloring
D&C Green #6
—
0.2
0.26
0.3
0.45
0.1-3
0.01-5 
(1% in mineral oil)
A
Coloring
D&C Red #17
—
0.82
0.97
1
1.5
 0.1-3.5
0.01-5 
(1% in mineral oil)
B
—
Dei

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