Two-phase roll-on cosmetic product

Details Two-phase roll-on cosmetic product Two-phase roll-on cosmetic product

2001-04-20

2003-01-28

Krass, Frederick (Department: 1614)

Drug, bio-affecting and body treating compositions

Anti-perspirants or perspiration deodorants

C424S401000, C424S486000, C424S066000, C424S067000, C424S068000, C424S078020, C514S063000, C514S724000, C514S770000, C514S947000, C524S862000

Reexamination Certificate

active

06511657

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a two-phase, roll-on cosmetic product, especially for use in the field of antiperspirants and/or deodorants.
BACKGROUND OF THE INVENTION
Current roll-on products in the market are usually emulsions which involve emulsions and/or the suspension of an antiperspirant active in the formulation. The products frequently require the use of one or more surfactants to stabilize and/or compatabilize two non-compatible phases. There are two issues associated with the use of surfactants. The first issue is skin irritation. Unless the surfactant system is carefully selected, the use of such materials may cause skin irritation. The second issue is efficacy. It may be the case that in some systems, the use of a surfactant may interfere with the gel plug formation by which many antiperspirant actives work to reduce perspiration.
Another group of benefits may also be achieved with the reduction and/or elimination of surfactants in cosmetic products that contain an antiperspirant active. These benefits include improving the dry feel of the product, reducing the amount of non-white residue on skin and clothing, and reducing the tackiness of the product.
Two-phase systems have been seen in a few cosmetic applications including liquids and solids. One commercial liquid two-phase product from The Dial Corporation (Scottsdale, Ariz.) is Nature's Accents® Bath Treats, a bubble bath product comprising water, cetearyl ethylhexanoate, sodium laureth sulfate, cocamidopropyl betaine, fragrance, glycerin, sodium cocoyl glutamate (and) disodium cocoyl glutamate, PEG-8, DMDM hydantoin, tetrasodium EDTA, hydrolyzed milk protein, honey extract, and coloring agents. As a cleansing material this product is formulated with surfactants. This product has a creamy milky top layer with a clear colored layer under it.
A second commercial liquid two-phase product is Cloud Dance™ breeze cologne spray distributed by CCA Industries, Inc. (East Rutherford, N.J.). This product lists the following ingredients: SD alcohol, 40D, hexamethyldisiloxane, fragrance, distilled water, sodium chloride, coloring agents, and benzophenone-3. This product is clear with two bands of differing colors.
There are patent references that describe two-phase or multiphase technology. U.S. Pat. No. 4,120,948 to Shelton describes a two-phase stick antiperspirant having (1) a substantially anhydrous antiperspirant phase comprising a water-insoluble, high melting point wax, a liquid emollient, and high levels of a particulate, antiperspirant active material and (2) a gel phase comprising a polyhydric alcohol gelled with either a fatty acid soap or a fatty acid amide.
U.S. Pat. No. 4,438,095 to Grollier et al describes a liquid cosmetic composition comprising two separate liquid phases. The first phase is an aqueous phase in which at least one cationic polymer is dissolved. The composition contains no detergent agent or foaming agents.
U.S. Pat. No. 4,767,741 to Komor et al teaches a two-phase liquid cosmetic composition comprising an oil phase, and organic liquid/water phase and insoluble solid particles absorbed on the interface between the two phases, wherein the solid particles are the in situ precipitation product of at least a first salt solution and a second salt solution (added to the oil phase and organic/water phase during blending thereof).
U.S. Pat. No. 4,973,473 to Schneider et al teaches (in a preferred embodiment) a composition comprising two discrete gel phases. The composition includes an emollient complex containing a selected carboxylic acid amide(s), a mucopolysaccharide, at least one skin structuring protein and an astringent.
U.S. Pat. No. 4,980,155 to Shah et al teaches a two-phase cosmetic composition comprising a color phase which includes a first phase comprising a film forming agent, at least one colorant, an emulsifier and water; and a second phase comprising a gel phase comprising a water soluble polymer and water. The phases are miscible with each other but are disposed in discrete side by side separate phases.
U.S. Pat. No. 5,213,799 to Foring et al describes skin treating compositions which comprise a transparent oil phase and a transparent aqueous phase, preferably with humectant effect, which permits a homogenous mixture when shaken together and thereafter separates again into two transparent phases. The cosmetic composition includes the use of 0.1-1.0 weight % of C12-C18 fatty acid triglycerol ester.
U.S. Pat. No. 5,290,555 to Guthauser et al teaches compositions with structural color in which two phases are selected with the same refractive index but different dispersive power. Either or both of the phases may contain cosmetically active ingredients.
U.S. Pat. No. 5,474,777 to Marion et al describes liquid cleansing compositions consisting of an oily phase and an aqueous phase, wherein the oily phase consists of at least one dialkylphosphate and, optionally, products miscible therein, and the aqueous phase contains one or more ionic surfactants.
U.S. Pat. No. 5,593,663 to Leng et al describes antiperspirant actives which are amphiphilic materials that, upon contact with perspiration, form a water-insoluble liquid crystal phase of greater than one-dimensional periodicity.
U.S. Pat. No. 5,654,362 to Schultz et al describes silicone oils and solvents thickened by silicone elastomers and suitable for use in products such as antiperspsirants and deodorants.
U.S. Pat. No. 5,919,437 to Lee et al describes solid cosmetic compositions including cosmetic cream compositions containing silicone elastomers as gelling agents.
U.S. Phase 6,019,991 to Tanaka et al teaches a two-phase cosmetic composition comprising separate and distinct oil and aqueous phases which form a highly temporary clear emulsion when shaken together. A clear package is used. One phase may be colored while the other is usually water white.
U.S. Pat. No. 6,180,587 to Fuller et al teaches a multiple phase composition comprising a lower aqueous phase comprising at least 1 weight % of a polymer or copolymer selected from the group consisting of polyacrylate, polystyrene sulfonate, polyvinyl-pyrrolidone, maleic anhydride and mixtures thereof and an upper aqueous phase having a cleansingly effective amount of a surfactant.
PCT case WO 00/67712 discloses a solid stick containing antiperspirant actives and formed with a core phase and an outer phase.
Conventional roll-on products used as antiperspirants and/or deodorants are usually emulsions or anhydrous suspensions. Emulsions can be oil-in-water or water-in-oil systems wherein one phase is dispersed in the other. In emulsions both phases remain together because of the addition of surfactants. Emulsion products tend to have a wet feel, a higher level of tackiness and some irritation issues. Anhydrous suspensions are composed of powders suspended in anhydrous liquids. They typically include a relatively high percentage of suspending agents that contribute to white residues being left on skin and clothing. While the anhydrous suspension do not produce a wet feel, they exhibit other problems such as settling of the powder over time and leakage of the carrier liquid, especially if the product is not continuously shaken.
The present invention reduces and/or eliminates some of the aforementioned problems. In particular, the compositions of the present invention are able to provide two phase antiperspirants and/or deodorants which have improved efficacy, reduced irritation on skin, reduced white residue on skin and clothing, and improved aesthetics such as reduced wetness.
BRIEF SUMMARY OF THE INVENTION
This invention is a two phase, roll-on product made with a polar phase and a non-polar phase wherein a cosmetically active ingredient effective as an antiperspirant and/or a deodorant is dissolved or suspended in one of the phases. The composition is packaged in a conventional roll-on dispenser. Before the product is applied the container is shaken or agitated forcefully enough to temporarily mix the two phases. The product is applied while the two phases are mixed.
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