Drug – bio-affecting and body treating compositions – Anti-perspirants or perspiration deodorants
Reexamination Certificate
2001-03-05
2002-06-11
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Anti-perspirants or perspiration deodorants
C424S066000, C424S068000, C424S400000, C424S401000
Reexamination Certificate
active
06403071
ABSTRACT:
TECHNICAL FIELD
The present invention relates to anhydrous antiperspirant and deodorant compositions that contain a solid d-pantothenate salt in an anhydrous matrix. The composition provides skin health benefits such as improved wound healing and reduced skin irritation.
BACKGROUND OF THE INVENTION
Many different antiperspirant and deodorant products are known for use in controlling or inhibiting underarm perspiration wetness and odor. These products are available in a variety of product forms such as solid sticks, soft solids or creams, roll-on liquids and aerosol or non-aerosol sprays. Most of these products, however, are similar in having a base formula that contains an antiperspirant active such as an aluminum and or zirconium salt, a suspending or thickening agent, and a suitable liquid carrier.
Antiperspirant and deodorant products can be formulated to contain materials to help sooth or minimize irritation of the underarm skin, especially in those consumers that shave their underarms and apply antiperspirant and deodorant products to the shaved area. The shaving process can irritate and damage the underarm skin, and it is for that reason that antiperspirant and deodorant products are occasionally formulated with materials such as aloe, allantoin, and panthenoic acid and related materials, to minimize or heal such skin irritation and skin damage. It is well known that pantothenic acid and similar other materials can be used as wound healing agents in a variety of personal care products, including antiperspirant and deodorant products.
Pantothenic acid and related materials can be formulated with an aqueous antiperspirant or deodorant active to provide wound healing and skin soothing benefits to the applied area of the skin. Examples of these skin soothing materials include pantothenic acid and pantothenic derivatives and salts such as d-panthenol, dl-panthenol, and pantothenate salts such as calcium pantothenate. The pantothenate salts are especially useful in providing wound healing and skin soothing benefits, even in combination with antiperspirant and deodorant actives. These highly preferred pantothenate salts are formulated into either an anhydrous or aqueous antiperspirant product matrix, wherein the salts are solubilized within the product matrix by water or other solvents. The product matrix containing the solubilized salts is then applied to the desired area of the skin so that the solubilized salts are allowed to spread or flow over the applied surface, thus helping to sooth or heal any irritated areas of the skin within the applied area.
It has now been found that anhydrous antiperspirant and deodorant products can be formulated with pantothenate salts as solid dispersed particulates, and still provide a soothing and healing effect on the underarm area of the skin, especially underarm skin that has been irritated or damaged by shaving. It is believed that the solid pantothenate salts are readily dissolved by the sweat or other moisture on the underarm, thus allowing the solids to dissolve after application. Once the product matrix is applied to the underarm area, the solid pantothenate salts dissolve in the sweat or other moisture on the skin and then flow or spread onto the applied surface of the underarm, thus helping to sooth, heal or mitigate any skin irritation or wounds associated with the underarm, especially skin wounds or irritation caused by shaving the underarm. It is also believed that by delaying dissolution of the pantothenate salts until after product application, that these solid particulates are then less likely than their dissolved counterparts to interact with other materials in the product matrix prior to application, including interaction with aluminum and zirconium antiperspirant actives or deodorant actives in the product matrix prior to application.
It therefore an object of the present invention to provide new anhydrous antiperspirant and deodorant compositions that contain materials to sooth or heal irritated underarm skin, especially underarm skin that has been irritated or damaged by shaving. It is a further object of the present invention to provide such a composition that contains solid pantothenate salts, especially solid calcium pantothenate salts, as dispersed particulates in an anhydrous antiperspirant and deodorant matrix.
SUMMARY OF THE INVENTION
The present invention is directed to anhydrous antiperspirant and deodorant compositions that comprise from about 0.1% to about 30% by weight of an antiperspirant or deodorant active; from about 0.01% to about 10% by weight of a solid, water-soluble, d-pantothenate salt; from about 0.1% to about 40% by weight of a suspending agent; and from about 10% to about 99% by weight of an anhydrous carrier liquid. The anhydrous antiperspirant and deodorant compositions are mild to the skin and provide skin soothing or healing benefits, especially when applied to the underarm after shaving.
It has been found that the d-pantothenate salts can be formulated as solid particulates in an anhydrous antiperspirant or deodorant composition, and still provide excellent skin soothing and healing benefits to the underarm. It is believed that the solid d-pantothenate salts help to minimize ingredient incompatibilities associated with the use of dissolved pantothenate salts in antiperspirant and deodorant products.
DETAILED DESCRIPTION OF THE INVENTION
The anhydrous antiperspirant and deodorant compositions of the present invention comprise as essential components an antiperspirant or deodorant active, a solid d-pantothenate salt, a suspending agent, and an anhydrous liquid carrier. Each of these essential components of the present invention is described hereinafter in more detail.
The term “anhydrous” as used herein means that the antiperspirant and deodorant compositions of the present invention, and the essential or optional components thereof, are substantially free of added or free water. From a formulation standpoint, this means that the anhydrous antiperspirant and deodorant compositions of the present invention preferably contain less than about 5%, more preferably less than about 3%, even more preferably less than about 1%, most preferably zero percent, by weight of free or added water, other than the water of hydration typically associated with any particulate solids prior to formulation.
All melting point values referenced herein, unless otherwise specified, are measured and determined according to well known Differential Scanning Calorimetry (DSC) technique. Examples of DSC technique for determining melting point values of various materials are described in U.S. Pat. No. 5,306,514 (Letton et al.), which description is incorporated herein by reference.
The term “ambient conditions” as used herein refers to surrounding conditions under about one (1) atmosphere of pressure, at about 50% relative humidity, and at about 25° C., unless otherwise specified. All values, amounts and measurements described herein are obtained under ambient conditions unless otherwise specified.
The term “volatile” as used herein refers to those materials that have a measurable vapor pressure at 25° C. Such vapor pressures will typically range from about 0.01 mmHg to about 6 mmHg, more typically from about 0.02 mmHg to about 1.5 mmHg, and have an average boiling point at one (1) atmosphere of pressure (atm) of less than about 250° C., more typically less than about 235° C. at one (1) atm. Conversely, the term “non volatile” refers to those materials that are not “volatile” as defined herein.
The term “skin temperature” as used herein refers to the temperature of the axilla area of the skin, which is generally at or slightly below a typical body temperature of about 37° C.
The term “water-soluble” as used herein refers to those materials, including the water-soluble skin active agent as described herein, that can be dissolved in deionized water at 37° C. under otherwise ambient conditions to form an aqueous solution containing at least 0.1% by weight of the dissolved material, preferably at least about 0.5% by weight of th
Scavone Timothy Alan
Schlagheck Benjamin Scott
Dodson Shelley A.
Winter William J.
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