Drug – bio-affecting and body treating compositions – Anti-perspirants or perspiration deodorants
Reexamination Certificate
2001-05-11
2002-07-16
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Anti-perspirants or perspiration deodorants
C424S066000, C424S068000, C424S400000, C424S401000
Reexamination Certificate
active
06419910
ABSTRACT:
BACKGROUND OF THE INVENTION
Cosmetic products can be in emulsion form. Antiperspirant and deodorant products which are in emulsion form are known in the art. These products may have an oil phase and a water phase. Moreover, these emulsions may be in gel form.
One can use such gel-type products, which can be antiperspirant and deodorants, by rubbing the underarm area of the body so as to apply an odor and/or perspiration reducing layer of the gel to the skin. Because such products are applied directly to the skin, such products should have certain aesthetic properties so that they will achieve consumer acceptance. Included in such aesthetic properties are non-tackiness during dry-down, non-tackiness when the user perspires after application of the product, smoothness, glide, a lack of oily or crumbly or scratchy feeling; and a product which leaves no white physical residue on skin or clothes after application.
Clarity is also an especially desired esthetic property in the eyes of the consumer.
It is an object of this invention to provide emulsion and gel-type cosmetic products especially an antiperspirant or deodorant product which has the above-recited aesthetic properties.
The following patent publications relate to this field of invention.
U.S. Pat. No. 5,587,153 discloses a clear gel-type cosmetic product which has a viscosity of at least about 50,000 cps at 21° C., and includes an emulsion with an oil phase and a water phase that includes an incorporated active ingredients. The refractive indices of the water and oil phases match to at least 0.0004, the refractive index of the product is about 1,4000, and the product clarity is better than thirty NTU.
U.S. Pat. No. 5,863,525 also discloses a clear gel-type cosmetic product which has a viscosity of at least about 50,000 cps at 21° C., and includes an emulsion with an oil phase and a water phase that includes an incorporated active ingredient. The refractived indices of the water and oil phases match to at least 0.0004 the refractive index of the product is about 1,4000, and the product clarity is better than thirty NTU.
U.S. Pat. No. 5,925,338 discloses a clear gel composition comprising a water-in-oil emulsion of specified viscosity, and specified amounts of water and oil, wherein the oil phase comprises a volatile cyclic silicone, an emulsifying agent, optionally a non-volatile oil, and a volatile linear silicone.
U.S. Pat. No. 5,393,518 discloses an optically clear antiperspirant product in the form of a stable water-in-oil emulsion with a specified viscosity which includes a stabilizing agent that has substantial solubility in each of the oil and water phases and which has long term stability over specified temperature ranges.
WO 92/05767 discloses a clear gel-type cosmetic product that has a viscosity of at least about 50,000 cps at 21 degrees C., and includes an emulsion with an oil phase and a water phase, wherein the refractive indices of the water and oil phases match to at least 0.0004, the refractive index of the product is about 1.4000 and the product clarity is better than 30 NTU.
SUMMARY OF THE INVENTION
The invention relates to a clear emulsion and gel-type cosmetic composition, and in particular to an antiperspirant and/or deodorant composition which comprises a water-in-oil emulsion comprising:
a) about 65% to about 92% of an aqueous solution of an effective amount of antiperspirant active;
b) about 8% to about 35% of an oil phase consisting of silicones, emollients and a silicone emulsifying agent; and
c) a water soluble, non-glycol component that raises the refractive index of said aqueous solution.
The water phase is essentially free of glycols and low and middle chain alcohols and incorporates inorganic salts, organic salts, amino acids or urea to raise the refractive index of the aqueous phase. Glycols are defined here as alkanes and alkoxyalkanes containing at least two hydroxy groups. Propylene glycol and dipropylene glycol are non-limiting examples of glycols. Low chain alcohols have from one to four carbon atoms. Middle chain alcohols have from 5 to 12 carbon atoms.
The invention also relates to a method for preventing and controlling perspiration wetness in humans which comprises applying to the underarm area an effective amount of a composition of the invention.
DETAILED DESCRIPTION OF THE INVENTION
As used herein, % means weight % of the entire composition, unless otherwise specified. As used herein “essentially free of simple glycols” means that the level of simple glycols present in the composition is in too low off amount to contribute to the tackiness or the stickiness or the wetness or the coolness of the product either during dry down or on perspiring after the product has been applied. This level is usually 0 to about 1% glycols or less. As used herein “simple glycols” means alkanes and alkoxyalkanes containing at least two hydroxy groups and three or less carbon atoms. Propylene glycol is a non-limiting examples of a simple glycol. “Essentially free of low or middle chain alcohols” means that the level of low or middle chain alcohols present is so low that those low or middle chain alcohols in too low off amount to contribute to the tackiness or the stickiness of the product either during dry down or on perspiring after the product has been applied. This level is usually about 0 to about 1% of low and/or middle chain alcohols.
All of the ingredients used to prepare compositions of the invention are known or can be prepared according to known methods. The compositions of the invention can be prepared by known methods or by methods analogous to known methods.
The invention relates to an emulsion and gel-type cosmetic composition, and in particular to an antiperspirant and/or deodorant composition which comprises a water-in-oil emulsion comprising:
The invention relates to a clear emulsion and gel-type cosmetic composition, and in particular to an antiperspirant and/or deodorant composition which comprises a water-in-oil emulsion comprising:
a) about 65% to about 92% of an aqueous solution of an effective amount of antiperspirant active;
b) about 8% to about 35% of an oil phase consisting of silicones, emollients and a silicone emulsifying agent; and
c) a water soluble, non-glycol component that raises the refractive index of said aqueous solution.
The water phase is essentially free of glycols and low and middle chain alcohols and incorporates inorganic salts, organic salts, amino acids or urea to raise the refractive index of the aqueous phase. Simple Glycols are as defined herein. Propylene glycol is a non-limiting example of a simple glycols. Low chain alcohols have from one to four carbon atoms. Middle chain alcohols have from 5 to 12 carbon atoms.
The invention also relates to a composition as described above wherein the refractive indices of the water phase and the oil phase are matched to within about 0.0008, or more preferably about 0.0004.
The invention also relates to optically clear compositions which have an NTU of 50 or lower. NTU means Nephelometric Turbidity Units.
The invention also relates to cosmetic compositions as described above which have decreased tackiness, stickiness, wetness and coolness measurements as ascertained by trained sensory panelists.
As noted above, the compositions of the invention can have an aqueous phase from about 65% to about 92%. More preferably, the composition of the invention can have an aqueous phase of about 70% to about 90%. The compositions of the invention can have an oil phase of about 8% to about 35%, more preferably about 10% to about 30%.
As noted just above, the compositions of the invention can have an optical clarity of 50 NTU or lower. More preferably, they can have an optical clarity of about 0 to about 30 NTU.
The invention also relates to a method for preventing and controlling perspiration wetness in humans which comprises applying to the underarm area an effective amount of a composition of the invention.
What follows now is a more detailed description of the ingredients which are included in the compositions of the inventio
Brewster David Allen
Ma Zhu-ning
Scafidi Anthony Aloysius
Dodson Shelley A.
Stein Kevin J.
Unilever Home & Personal Care USA , division of Conopco, Inc.
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