MXPA99011742A - Anhydrous gel deodorant compositions - Google Patents

Abstract

Disclosed are anhydrous gel deodorant compositions comprising from about 0.001%to about 50%by weight of deodorant active, fragrance, or combination thereof;from about 0.01%to about 20%by weight of a gellant;from about 1%to about 50%by weight of a nonpolar volatile solvent having a solubility parameter of less than 8.0 (cal/cm3)0.5, a vapor pressure of from about 0.01 mm Hg to about 6 mm Hg at 25°C, and a boiling point at 1 atm of less than about 250°C;from about 1%to about 15%by weight of a polar solvent having a solubility parameter of from 12.5 (cal/cm3)0.5 to about 25 (cal/cm3)0.5 and optionally a moderately polar solvent having a solubility parameter of from about 8.0 (cal/cm3)0.5 to less than 12.5 (cal/cm3)0.5, preferably 1,2-hexamediol. Other preferred embodiments include those which contain combinations of triclosan and triclocarban for improved deodorant efficacy. These compositions provide improved performance and skin feel characteristics, and are especially effective at providing deodorant application which is milder to the skin, an improved product clarity.

Description

DEODORANT COMPOSITIONS IN GEL ANHYDRO FIELD OF THE INVENTION This invention relates to anhydrous gel deodorising compositions containing a non-polar volatile solvent in combination with a polarizing solvent and an active deodorant or fragrance. These compositions are gentle on the skin and cause less irritation to the skin, and have good skin feel characteristics during and after application.

BACKGROUND OF THE INVENTION The odors of the human body are generally believed to be caused in part by microbial interaction with the secretions of the sweat glands that produce acrid fatty acids. In addition to cleaning, one way to control these odors is through the topical application to the armpit of an anti-perspirant or deodorant composition. The deodorant compositions in gel form are especially popular as a means to avoid or mask odors that arise from perspiration. These gel deodorizing compositions are typically in the form of a solid solid or solid stick and, like other antiperspirant or deodorant products, are also applied topically to the underarm or other area of the skin. However, gel deodorants typically glide on the skin more easily than many other antiperspirant or deodorant products, and leave very little visible residue if there is any after the application. These gel deodorants typically contain a gelling agent, a polar solvent to solubilize the gelling agent, and a deodorant active agent such as, for example, an antimicrobial active, perfume or other odor masking material. The gelling agents commonly used in these systems include fatty acid salts, examples of which include sodium or potassium salts of C 2 -C 22 fatty acids. The polar solvents commonly used in combination with the fatty acid salts to form the gel structure of the composition include monohydric or dihydric alcohols, especially ethanol and glycols, such as, for example, propylene glycol, dipropylene glycol and other higher molecular weight propylene glycols. . However, many of these gel deodorants are not gentle on the skin and can cause excessive skin irritation. Therefore, it is an object of the present invention to provide an anhydrous gel deodorant composition which is gentle on the skin and causes less irritation thereto, and furthermore provides a composition which also has good characteristics of the skin. feeling on the skin during and after topical application. Still another object of the present invention is to provide a composition wherein the composition comprises a volatile non-volatile solvent in combination with a polar solvent, and further provide a composition optionally comprising a moderately polar solvent.

BRIEF DESCRIPTION OF THE INVENTION The present invention is directed to anhydrous gel deodorant compositions comprising from about 0.001% to about 50% by weight of a deodorant active, fragrance, or combination thereof; from about 0.01% to about 20% by weight of a gellant; from about 3% to about 50% by weight of a non-polar volatile solvent having a solubility parameter of less than (cal / cm 3) > or .5 a vapor pressure from about 0.01 mm Hg to about 6 mm Hg at 25 ° C; from about 1% to about 15% by weight of a polar solvent having a parameter of __ solubility from 12.5 (cal / cm3) 0"5 to about 25 (cal / cm3) 0.5 and optionally a moderately polar solvent having a solubility parameter from 8.0 (cal / cm3) 0"5 to less than 12.5 (cal / cm or .5) These anhydrous gel deodorant compositions have been found to provide improved performance and skin feel characteristics, and are especially effective in providing a deodorant application that is gentle on the skin and causes less or no skin contact. irritation in it. c = DETAILED DESCRIPTION OF THE INVENTION The anhydrous gel deodorant compositions of the present invention comprise as essential ingredients a gelling agent, a volatile non-polar solvent, a polar solvent and a perfume or deodorant active. These anhydrous gel deodorant compositions are intended for topical application in the armpit or other suitable areas of the skin. Preferably, the compositions are in the form of solid solid or soft bars, but can also be formulated in a variety of non-stick formulations suitable for application to the armpit or other area of the skin. The term "anhydrous" in the sense in which it is used herein refers to the gel deodorant composition of the present invention, and means that the composition is practically free of water, preferably less than about 5%, more preferably less than about 1%, still more preferably zero percent by weight free of water or water added in the gel deodorant. The term "environmental conditions" in the sense in which it is used herein refers to the surrounding conditions under about a pressure atmosphere, at about 50% relative humidity, and at about 25 ° C. The term "substantially free of aromatic hydrocarbons" in the sense in which it is used herein refers to the anhydrous gel deodorant compositions of the present invention which contain less than about 10%, preferably less than about 5%. % by weight of aromatic hydrocarbons selected from the group of a-pihene, β-pinene, d-limonene and other terpenes. The anhydrous gel deodorant compositions of the present invention may comprise, consist of, or consist essentially of essential elements and limitations of the invention described herein, as well as any other additional or optional ingredients, components, or limitations described in the foregoing. present All the percentages, parts and proportions are by weight of the total composition, unless otherwise specified All weights as they pertain to the ingredients listed are based on the active level and, therefore, they do not include solvents or by-products that can be included in commercially available materials unless otherwise specified.

DEODORANT ACTIVE AND FRAGRANCE _ The anhydrous gel deodorant compositions of the present invention comprise an active deodorant, fragrance or combination thereof, which include deodorant fragrances, at concentrations ranging from about 0.001% to about 50%, preferably from about 20% to about 50%. immaculately 0.01% to about 20%, more preferably from about 0.1% to about 10%, by weight of the composition. These active deodorants and perfumes include any deodorant or fragrance known or otherwise safe and effective for topical application to human skin. Unless otherwise specified, the term "active" in the sense in which it is used herein generally refers to deodorant active or fragrance, while the term "deodorant active" specifically refers to topical materials that they can avoid or eliminate the bad odors that result from perspiration. The term "fragrance" in the sense in which it is used herein, specifically refers to any topical material that covers or masks odors that result from perspiration, or that otherwise provides the composition with the scent of desired perfume.

A) Deodorant Active Deodorant actives suitable for use in the anhydrous gel deodorant composition include any topical material that is known or otherwise effective in preventing or eliminating odors associated with perspiration. These deodorant actives are typically antimicrobial agents (e.g., bacteriocides, fungicides), malodor absorbing material, or combinations thereof. Preferred deodorant actives are antimicrobial agents, non-limiting examples of which include cetyltrimethylammonium bromide, cetyl pyridinium chloride, benzethonium chloride, diisobutyl-1-phenoxy-ethoxy-1-dimethyl chloride. -benzium-ammonium, sodium N-lauryl sarcosine, sodium N-palmitethyl sarcosine, lauroyl sarcosine, N-myristoyl glycine, potassium N-lauryl sarcosine, trimethylammonium chloride, sodium-aluminum chlorhydroxy lactate, citrate -triethyl, tricethyl ethyl ammonium chloride, diphenyl ether of 2,4,4'-t-ricloro-2'-hydroxy (triclosan), 3,4,4'-trichlorocarbanilide (trichlocarbon), diaminoalkyl amides, such as example, hexadecyl amide of L-lysine, heavy metal salts of citrate, salicylate, and pyroctose, especially zinc salts, and acids thereof, heavy metal salts of pyrithione, especially pyrithione de = zinc, zinc phenosulfate , farnesol, and combinations thereof.

-T Preferred deodorant actives are triclosan, cyclocarbon, and co-binders thereof, wherein the preferred concentration of either triclosan or triclocarban ranges from about 0.01% to about 1.0%, more preferably about 0.1%, approximately 0.5%, still more preferred from about 0.1% to about 0.3%, by weight of the composition, and where the total concentration of triclosan and trichlocarbonate when used together in a composition varies from about 0.01% to about 2.0%, of greater preference from about 0.2% to about 1.0%, still more preferably about 0.2% about 0.6%, by weight of the composition. It has been found that the combination of these two active deodorants provides a deodorant efficacy that exceeds the cumulative deodorizing efficacy that one could otherwise predict from that combi_nation. and The preferred combination of triclosan and triclocarban is effective to provide improved deodorant performance from the deodorant compositions described herein, or from any known deodorant or topical composition that contains this combination that is otherwise suitable for application to the human skin. Therefore, the present invention is also directed to a method for controlling the bad odor associated with human perspiration by topically applying the combination of t riclosan / t-cyclocarbon described above, or any other suitable composition containing the triclosan / t-cyclocarbon combination described above, to the armpit or other area of the skin. From most of these deodorant compositions containing this combination, from about 0.1 grams to about 2.0 grams are applied per axilla of the deodorant composition, preferably once or twice a day, most preferably once a day. Other active deodorants include odor absorbing materials, such as, for example, carbonate and bicarbonate salts, which include carbonates and bicarbonates of alkali metal, ammonium and tetraalkylammonium. Sodium and potassium salts of these odor absorbing materials are preferred. Preferably, the anhydrous deodorant composition is practically free of astringent antiperspirant actives, such as, for example, astringent salts or aluminum or zirconium complexes. In this context, the term "practically free" means that the gel deodorant composition preferably contains less than about 5%, more preferably less than about 2%, still more preferably zero percent by weight of the astringent antiperspirant actives.

B) Fragrance Suitable fragrances for use in the anhydrous gel deodorant composition include any topical material that is known or otherwise effective in masking the bad odor associated with perspiration, or which would otherwise provide the composition with the desired perfume aroma. These fragrances include any fragrance perfume or chemical body suitable for topical application to the skin. The concentration of the fragrance in the anhydrous gel composition must be effective to provide the desired flavor characteristics or to "mask the bad odor, where the malodour is inherently associated with the composition itself or is associated with the development of foul odor. Also, the fragrance and all the accompanying carriers should not impart excessive itching to the skin, especially chapped or irritated skin, at the levels previously described.The fragrance will typically be in the form of insoluble perfumes. in water which are solubilized in the anhydrous gel deodorant composition - The fragrances are made by those skilled in the art in a wide variety of fragrances and concentrations.The typical fragrances are described in Arctander, Perfume and Flavor Chemicals (Aroma Chemicals) ^ , Vol. I and II (1969); and Arctander, Perfume and Flavor Materials of Natural Origin (1960). U.S. Patent 4,322,7308 and U.S. Patent 4,304,679, both incorporated herein by reference, describe fragrance components that generally include, but are not limited to: volatile phenolic substances (such as, for example, iso-amyl) salicylate, benzyl salicylate, and thymus red oil); essential oils such as, for example, geranium oil, patchouli oil, and flower oil, petit); citrus oils; extracts and resins (such as, for example, Siamese benzoin resinoid and opoponaco resinoid); "synthetic" oils (such as for example Bergamot 37 and 430, Geranium 76 and Pomeransol 314); aldehydes and ketones (such as by zeje plo, naphthyl ketone of B-methyl, hydrocinnamic aldehyde of p-t-butyl-A-methyl and cyclohexanone of p-t-amyl); polycyclic compounds (such as, for example, coumarin and ß-naphthyl methylether); esters (such as, for example, diethyl phthalate, phenylethyl phenylacetate, nonanolide-1: 4). The fragrances also include esters and essential oils derived from floral materials and fruits, citrus oils, pure aldehydes, resinoids, notes of musk and other animals (for example, natural isolates of civet, castoreum and musk), balsams, etc. , and alcohols (such as, for example, dimyrcetol, phenylethyl alcohol and tet rahidromuguol). Examples of these useful components in the fragrances herein include decyl aldehyde, undecyl aldehyde, undecylenic aldehyde, lauric aldehyde, amyl cinnamic aldehyde, phenyl methyl ethyl glycidate, nonyl methyl acetaldehyde, myristic aldehyde, nonalactone, nonyl aldehyde, aldehyde octyl, undecalactone, hexyl cinnamic aldehyde, benzaidehyde, vanillin, heliot garniture, camphor, para-hydroxy phenolbutanone, tetrahydronaphthalene of 6-acetyl 1,1,3,4,4,6 hexamethyl, alpha-methyl ionone, gamma-ionone ionone , and amyl-cyclohexanone, and mixtures of these components. Other suitable fragrances are those which mask or help to mask odors associated with perspiration (hereinafter referred to as odor-masking fragrances), some non-limiting examples thereof are described in U.S. Patent 5,554,588, U.S. Patent 4,278,658, U.S. Patent 5,501,805, and Patent Application EP 684 037 Al, all are incorporated herein by reference 'in their entirety. Preferred odor masking fragrances are those having a Deodorizing Value of at least about 0.25, more preferably from about 0.25 to about 3.5, still more preferably from 0.9 to about 3.5, as "measured by the Deodorant Value Test described. in the patent application EP 684 037 Al. - The fragrance for use herein may also contain solubilizers, diluents or solvents which are well known in the art These materials are described in Arctander, Perfume and Flavor Chemicals (Aroma Chemicals ), Vol. I and II (1969) These materials typically include dipropylene glycol, diethylene glycol, Ci-Ce alcohols, and benzyl alcohol.

"Gelifier" ~ The anhydrous gel deodorant composition of the present invention comprises a gelling agent suitable for providing the desired strength and application characteristics to the composition.The gelling concentrations vary from about 0.01% to about 20%, preferably about 0.1% to about 10%, more preferably from about 1% to about 8%, still more preferably from about 3% to about 7%, by weight of the anhydrous gel deodorant composition, any gelling agent or gelling system can be used known in the anhydrous gel deodorant composition of the present invention with the proviso that the selected gelling agents can be melted and form a solution or other homogeneous liquid or liquid dispersion with the selected solvent system described herein at a about 50 ° C to about 150 ° C, of p reference of approximately 50 ° C to approximately 120 ° C, more preferably from about 60 ° C to about 100 ° C. The selected gelling agent must also provide the gel deodorant composition with the desired gel matrix after the formulation and at the end of processing which then gives the composition the strength or spreading characteristics. Preferred gelling agents for use in the anhydrous gel deodorant composition of the present invention are salts of fatty acids, in _ i = where the fatty acid portion has from about 12 to about 40 carbon atoms, preferably from about 12 to about 22 carbon atoms, more preferably from about 16 to about 20 carbon atoms, still more preferred of about 18 carbon atoms Suitable salt cations for use with these gelling agents include metal salts such as alkali metals, for example, sodium and potassium, and alkaline earth metals, for example, magnesium and aluminum. the sodium and potassium salts, more preferably sodium stearate, sodium palmitate, sodium laurate, sodium arachidate, sodium behenate, potassium stearate, potassium palmitate, sodium myristate, aluminum monostearate, and combinations thereof. Non-limiting examples of fatty acids suitable for producing gelling agents are most preferred. of fatty acid, include acids, such as for example, irythic, palmitic, stearic, oleic, lauric, arachidic, behenic, linoleic, linolenic, margaric and combinations thereof. These fatty acids are preferably derived from sources, such as, for example, coconut oil, beef tallow, lanolin, fish oil, beeswax, palm oil, peanut oil, olive oil, oil of s.emilla. of cotton, soybean oil, corn oil, rapeseed oil, colony acids, fats and other natural sources, or are derived by synthetic or semi-synthetic methods well known to those skilled in the art of the formulation. Other gelling agents suitable for use in the anhydrous gel deodorant composition include hydroxy acids, fatty acids, fatty acid esters and fatty acid salts, fatty hydroxy fatty acids, spherical materials, lanolinol materials, and other amide gelling agents known to be used as agents. gelling agents or otherwise are described in detail hereinafter. Non-limiting examples of suitable fatty acid gelling agents include fatty acid and hydroxy acids or alpha hydroxy fatty acids, having from about 10 to about 40 carbon atoms, examples of which include 12-hydroxy-aroic acid, 12-hydroxylauric acid, 16-hydroxy acid hydroxyhexadecanoic, behenic acid, euricic acid, stearic acid, caprylic acid, lauric acid, isoesteric acid, combinations thereof, and salts thereof. Other non-limiting examples of specific gelling agents suitable for use in the anhydrous gel deodorant composition include those corresponding to the following formula: wherein Rx is 0R2 or NR2R3; and R 2 and R 3 are hydrogen, or an alkyl, aryl, or arylalkyl radical that is linear or branched or cyclic and has from about 1 to about 22 carbon atoms; preferably "from about 1 to about 18 carbon atoms. R2 and R3 may be either the same or different; however, preferably, at least one is a hydrogen atom. Among these gelling agents are those selected from the group consisting of 12-hydroxystearic acid, 12-hydroxystearic acid methyl ester, 12-hydroxystearic acid ethyl ester, and 12-hydroxystearic acid benzylester of 12-hydroxyl acid. Theoretical, 12-hydroxyl tearic acid amide, 12-hydroxyl isopropyl tetraric acid amide, 12-hydroxystearic acid butylamide, 12-hydroxystearic acid benzylamide, 12-hydroxystearic acid phenylamide, 12-hydrohydroxyxysteic acid tert-butylamide 12-hydroxystearic acid cyclohexylamide, 1-adamant 12-hydroxystearic acid ilamide, 2-adamant 12-hydroxystearic acid ilamide, 12-hydroxystearic acid diisopropylamide, and mixtures thereof Suitable non-limiting examples of amide gelling agents for use in the anhydrous gel deodorant composition, include disubstituted monoamide gelling agents or greases, gelling agents of monosus r thalide or branched gels, triamide gelling agents, and combinations thereof. Preferred are the alkyl amides of the di- and / or tri-basic carboxylic acids or anhydrides which are in accordance with the formula: I9 II I5 C N R. . ^ ° ?? 11: - c - N 1 1 10 wherein a structure is formed from the bond of C ', C "and X and where a) Rx is null, hydroxy, hydrogen, aryl, siloxane or C 1 -C 22 alkyl, C 1 -C 22 alkenyl, C? -C22, C1- C22 alkyl alkylethers, straight chain, branched or cyclic, substituted or unsubstituted, saturated or unsaturated, C1-C22 alkyl substituted, preferably C1-C22 alkyl, C4-18, C4-C18 alkenyl, C4-C18 alkoxy, C4-C18 alkyl esters, C4-C18 alkyl ethers, or aryl substituted with C4-C18 alkyl, more preferably C12-C? 8 alkyl, C 12 -C 18 alkenyl, C 2 -C 8 alkoxy, C 2 -C 8 alkylaryl, C 12 -C 18 alkylethers, or C 12 -C 18 alkyl substituted aryl; b) R 2, R 4, R5 and Re. Are independently or together, hydrogen, hydroxy, aryl, siloxane or C?-C22 alkyl, C?-C22 alkenyl, C?-C22 alkoxy, C alqu-C¡2 alkyl alkylesters C? -C22, straight chain, branched or cyclic substituted in substituted, saturated or unsaturated, or aryl substituted with Ci-C22 alkyl, preferably C4-C10 alkyl, C4-C10 alkenyl, C4-C10 alkoxy, C4-C10 alkylester, C4-C10 alkyl ether, or aryl substituted with C 4 -C 10 alkyl, more preferably C 4 -C 8 alkyl, C 4 -C 8 alkenylp, C 4 -C 8 alkoxy, C 4 -C 8 alkyl esters, C 4 -C 8 alkylethers, or C 1 -C 8 alkyl substituted aryl C8; c) R3 is null, hydroxy, hydrogen, C1-C4 alkyl, alkenyl of _C? -C4, C1-C4 alkoxy, C? -C4 alkyl esters or straight chain, branched or cyclic C1-C4 alkyl ethers, substituted or unsubstituted, saturated or unsaturated, preferably a C3-C4 alkoxy, hydroxy or hydrogen, more preferably a hydroxy or hydrogen; d) R7 and R8 are independently or jointly, null, hydrogen, hydroxy, aryl, siloxane or C? -C2 alkyl, C? -C22 alkenyl, C? -C22 alkoxy, C? -C22 alkyl esters, alkyl ethers of straight-chain, branched or cyclic C-C22, substituted or unsubstituted, saturated or unsaturated, or aryl substituted with C 1 -C 22 alkyl, preferably C 4 -C 10 alkyl, C 4 -C 10 alkenyl, C 4 alkoxy C10, C4-C10 alkylesters, C4-C10 alkyl ethers, or aryl substituted with C4-C10 alkyl, more preferably C4-C8 alkyl, C4-C8 alkenyl, C4-C8 alkoxy, C4-C8 alkylesters , C4-Cs alkyl ethers, or aryl substituted with C4-C8 alkyl; e) R9 is zero or hydrogen; f) Rio and R11 are independently or jointly, null, hydrogen, hydroxy, aryl, siloxane or C? -C6 alkyl, alkenyl d? C? -C6, C? -C6 alkoxy, Ci-Ce alkyl esters, alkyl ethers of straight-chain, branched or cyclic C6-C6, substituted or unsubstituted, saturated or unsaturated, or aryl substituted with C6-C6 alkyl, preferably C1-C4 alkyl, C1-C4 alkenyl, C1 alkoxy -C4, C1-C4 alkyl esters, C1-C4 alkyl ethers, aryl substituted with C1-C4 alkyl or hydrogen, more preferably hydrogen; g) X is zero, nitrogen, aryl or -CH n where n is an integer from 1 to 6, preferably -fCH2-H? where n is an integer from 1 to 3; h) Y is zero, acyl or carbonyl; i) Z is zero, hydrogen, hydroxy, aryl, siloxane, nitrogen or C 1 -C 22 alkyl, C 1 -C 22 alkenyl C 1 -C 22 alkoxy / _ C 1 -C 22 alkylesters / C 1 -C 12 chain alkylethers straight, branched or cyclic, substituted or unsubstituted, saturated or unsaturated, or aryl substituted with C 1 -C 22 alkyl, preferably C 4 -C 10 alkyl, C 4 -C 10 alkenyl, C 4 -C 10 alkoxy, C 4 alkylester C10, C4-C10 alkyl ethers, or aryl substituted with C4-C3.0 alkyl, more preferably C4-C8 alkyl, C4-C8 alkenyl, C4-C8 alkoxy, C4-C8 alkyl esters, C-alkyl ethers -C8, or aryl substituted with C4-C8 alkyl; and _3 j) "a" is a double or single bond with the condition that: _ (i) when X is null, Y, Z, R3, R7 and R8 are null, C1 is directly connected to C "and Rx is not a hydrogen, (ii) when X and Z are not null and Y is zero, X is directly bonded to Z; ~ (iii) when Z is zero, a hydrogen or a hydroxy, R7 and Rs are zero; and (iv) when "a" is a double bond, R3 and R9 are "non-limiting." Non-limiting examples of specific alkyl amide gelling agents suitable for use in the anhydrous gel deodorant composition include alkyl amides of citric acid, tricarballylic acid. , aconitic acid, nitrilotriacetic acid, succinic acid, and itaconic acid, such as, for example, tributyl ilamide 1,2,3-propsrho, tributylamide 2-hydroxy-l, 2,3-propane, 1-propen-1,2 , 3-trioctylamide, N, N ', N "-tri (acetodecyla ida) amine, 2-dodecyl-N, N'-dihexylsuccinamide, and 2 -dodecyl-N,' -dibutylsuccinamide.

Volatile Non-Polar Solvent The anhydrous gel deodorizing compositions of the present invention comprise a volatile non-polar solvent having selected solder, vapor pressure and solubility parameter. The concentration of the volatile non-polar solvent in the anhydrous gel deodorant composition would range from about 1% to about 50%, preferably from about 10% to about 40%, most preferably from 20% to about 40%, still of higher preference from about 30% to about 40% by weight ~ of the composition. The term "volatile", in the sense in which it is used herein, refers to the volatile non-polar solvent of the anhydrous gel deodorant composition of the present invention, and in this context specifically refers to non-polar solvents having a vapor pressure as measured at 25 ° C from about 0.01_mmHg to about 6mmHg, preferably from about 0.02mmHg to about 1.5mmHg, and an average boiling point at a pressure atmosphere (1 atm) of less than about 250 ° C, preferably less than about 235 ° C, at 1 atmosphere (atm) of pressure. The term "non-polar", in the sense in which it is used herein, refers to the volatile non-polar solvent of the anhydrous gel deodorant composition of the present invention, and in this context specifically refers to non-polar solvents. volatiles that have a solubility parameter of less than 0 (cal / cm3) 0.5 preferably of about 5.0 (cal / cmJ) 0.5 less than 8.0 (cal / cm) u, most preferably 6.0 (cal / cm3) 0-5 to about 7.60 (cal / cm3) 0-5. The solubility parameters for the volatile non-polar solvent and other materials described herein are determined by methods well known in the chemical arts to establish the relative polar character of a solvent or other material. A description of the solubility parameters and the means to determine them are described by C.D. Vaughan, "Solubility Effects in Product, Package, Penetration and Preservation" 103 Cosmetics and Toiletries 47-69, October 1988; and C.D. Vaughan, "Using Solubility Parameters in Cosmetics Formula", 36 J. Soc. Cosmetic Chemists 319-333, September / October 1988, the descriptions of which are incorporated herein by reference. Volatile non-polar solvents suitable for use in anhydrous gel deodorant compositions are those solvents having the vapor pressure and the solubility parameters described above, which may also include hydrocarbons, esters, amides, and ethers having the vapor pressure and the required solubility parameter. Preference is given to non-polar hydrocarbon solvents which may be cyclic, branched or chain configurations, more preferably branched chain hydrocarbons. More preferably, the volatile non-polar solvent is a branched chain hydrocarbon having the required vapor pressure and solubility parameter and having from about 4 to about 30 carbon atoms, preferably from about 4 to about 20 carbon atoms. carbon, more preferably from about 6 to about 20 carbon atoms. The most preferred anhydrous gel deodorant composition comprises a combination of two or more of the branched chain hydrocarbons described in the foregoing., e ~ n where the combination of two more hydrocarbons have different molecular weights, number of carbon atoms, and / or chain configurations. Specific non-limiting examples of these more preferred combinations of hydrocarbon solvents include the isoparaffins available from Exxon Chemical Company, Bayto n, Texas USA, as Isopár M (isoparaffin "of C? 3-C? 4), Isopar C (Isoparaffin of C7) -C8), C8-C9 Isoparaffin (Isopar E), Isopar G (Cio-n Isoparaffin), Isopar L (C11-C13 Isoparaffin) and Isopar H (C11-C12 Isoparaffin) Other non-limiting examples of hydrocarbons Suitable branched chain include Permethyl 99A (isododecane) Permethyl 102A (isoeicosane), Permethyl 101A (isohexadecane), combinations of the same, Permethyl series are available from Preperse, -Inc., South Plainfield, New Jersey, USA Other non-limiting examples of suitable branched chain hydrocarbons include petroleum distillates, such as, for example, those available from Phillips Chemical such as Soltrol 130, Soltrol 170, and those available from Shell as Shell Sol 70, -71, and -2033.

"Non-limiting examples of other non-polar volatile solvents suitable for use in the anhydrous gel deodorant composition include dibutyl adipate, diisopropyl adipate, dodecane, octane, decane and combinations thereof. Yet another example includes C11 alkanes / cycloalkanes. -C15 available from Exxon as Exxsol D80.

Polar Solvent; The anhydrous gel deodorant composition of the present invention comprises one or more polar solvents having a selectively high solubility parameter. The concentration of the polar solvent in the anhydrous gel deodorant gel composition will vary with the specific polar polarization, gelling, and other optional solvents in the composition, although it should not exceed about 15% by weight of the composition, preferably from about 0.5% to about 10%, more preferably from about 1% to about 8%, still "more preferably from about 3% to about 7% by weight of the dehydrating composition in anhydrous gel, wherein the polar solvent has a solubility parameter of at least 12.5 (cal / cm3) 0.5, preferably 12.5 (cal / cm3) 0-5 to about 25 (cal / cm3) 0-5, most preferably 12.5 (cal / cm3) 0-5 to about 17.0 (cal / cm3) ° -5.

Non-limiting examples of polar solvents suitable for use in the anhydrous gel deodorant composition include monohydric alcohols, polyhydric alcohols, and combinations thereof, examples of which include monohydric alcohols of _C? to C2o preferably monohydric alcohols of C2 to Cs, and propylene glycols and polyethylene glycols having from 2 to 7 repeating ethoxylate or propoxylate groups, and polyglycerols having from 2 to 16 repeating glycerol moieties. Specific examples of polar solvents suitable for use in the anhydrous gel deodorant composition include, but are not limited to: glycerin, propylene glycol, dipropylene glycol, ethanol, water, tertropylene glycol, butyl glycol, propylene glycol methyl ether, dipropylene glycol methyl ether, and combinations thereof . Glycerin is more preferred. The deodorant gel compositions of the present invention are preferably substantially free of propylene glycol, dipropylene glycol, or combinations thereof. In this context, the term "practically free" means that the compositions preferably contain less than 20%, more preferably less than 10%, still more preferably zero per cent, by weight of propylene glycol, dipropylene glycol, or combinations thereof. . A preferred embodiment of the anhydrous gel deodorant composition of the present invention is that which comprises g? Icerin as the polar solvent "and a metal salt of a fatty acid as defined herein as the gellant, wherein the proportion by weight from glycerin to fatty acid salt "is from about 0.5: 1 to about 3: 1, preferably from about 0.8: 1 to about 1.5: 1. It has been found that this narrow proposal of glycerin to fatty acid salt in the anhydrous gel deodorant composition allows the formulation of a sufficiently hard gel rod to be formulated or processed using sufficiently low process temperatures to minimize or eliminate the thermal degradation of the materials sensitive to heat in the composition. The combinations of sodium stearate and glycerin are more preferred. Another embodiment of the anhydrous gel deodorant composition of the present invention is that which comprises a fatty acid or hydroxy acid fatty acid gellant as described herein, in the anhydrous gel deodorant composition also described herein. Unlike all other embodiments of the anhydrous gel deodorant compositions of the present invention, these compositions may contain but not require the use of polar solvents and preferably contain less than 5%, more preferably less than 2%. , still more preferably less than 0.1%, by weight of these polar solvents. = "~~ = Other non-limiting examples of polar solvents which may be suitable for use herein are described in U.S. Patent 5,429,816; Cosmetics, "Science, and Technology, Vol 1, 27-104, edited by Balsam and Sagarin (1972), U.S. Patent 4,202,879, and U.S. Patent 4,816,261, the disclosures of which are incorporated herein by reference .

Moderately Polar Solvent The anhydrous gel deodorant composition of the present invention may further comprise one or more moderately polar solvents having a selectively moderate solubility parameter. This optional solvent is used in the anhydrous gel deodorant composition in addition and in combination with the polar solvent described above. The moderately polar solvent helps to reduce the syneresis of the anhydrous gel deodorant composition during storage for shipping or for a long time, especially when shipping or storage is carried out in hot climates or under hot storage conditions. The moderately polar solvent also helps reduce the process temperatures that can cause thermal degradation of fragrances or other similar materials in the anhydrous gel deodorant composition. The moderately polar solvent comprises one or more solvents having a solubility parameter from about 0 (cal / cm3) 0.5 less than 12.5 (cal / cm 3.0.5 preferably from about 9.0 to less than 12.5 (cal / cm3 or .5 , wherein, the concentration of the moderately polar solvent in the anhydrous gel deodorant composition preferably ranges from about 0.1% to about 40%, more preferably from 5% to about 30%. "The selection of specific concentrations for a solvent moderately polar will vary depending on the other selected solvents and gelling agents in the anhydrous gel deodorant composition - Non-limiting examples of moderately polar solvents suitable for use in the anhydrous gel deodorant composition include ethoxylated ethers of fatty alcohols having from about 8 to about 30 carbon atoms, esters of polyhydric alcohols, esters of fatty acids, poliet ilenglicoles having at least 8 ethoxylated groups, - polypropylene glycols having at least 8 propoxylated groups, non-polymeric diols having at least 4 carbon atoms, and combinations thereof. Specific non-limiting examples of moderately polar solvents suitable for use in the gel deodorant composition include monoes is propylene glycol propylene; mycophenolate PPG-3; PEG-8; hexylene glycol; 1,2, hexanediol; 1,2-butyl ether, PPG-14, dimethyl isosorbide, and combinations thereof. Preferred are hexylene glycol, PPG-3 myristyl ether, propylene glycol monoisostearate, 1,2-hexanediol, and combinations thereof! It has been found that anhydrous gel deodorant compositions containing 1,2-hexanediol are especially effective in providing improved product clarity and improved softness when applied topically to the skin.

Optional Ingredients The anhydrous gel deodorant compositions of the present invention may further comprise one or more optional components that may modify the physical, chemical, cosmetic or aesthetic characteristics of the compositions or may serve as additional "active" components when deposited on the skin. . The compositions may also comprise optional inert ingredients. Many of these optional ingredients are known to be used in deodorants or other personal care compositions and may also be used in the anhydrous gel deodorant compositions herein, with the proviso that these optional materials are compatible with the materials. essentials described herein, or that do not otherwise unduly damage the performance of the product.

Non-limiting examples of optional ingredients suitable for use in the anhydrous gel deodorant composition herein include pH regulating agents; additional emollients; humectants; appeasing agents; dyes and pigments; medications, conservatives; and soothing agents such as, for example, aloe vera, allantoin, D-panthenol, avocado oil and other vegetable oils, and lichen extract.

MANUFACTURING METHOD 2. The compositions of the present invention can be made by any of the methods known in the art for the formulation of the deodorant gel compositions. As will be apparent to those skilled in the art, the particular method will depend on the selection of the specific types and amounts of the components employed. In general, the compositions of the present invention can be prepared by mixing the polar solvent, the volatile non-polar solvent, the deodorant active and any other optional solvents. Adding the gellant with stirring and heating the mixture to a temperature from about 75 ° C to about 100 ° C allows the gellant to melt and form a virtually clear or translucent liquid. The resulting solution is cooled beforehand, the fragrance added (if applicable), and then the cooled composition is emptied into an appropriate container or dispenser at about 70 ° C and allowed to solidify inside the container or dispenser upon cooling or allowing the contained composition is cooled to room temperature.

METHOD OF USE The anhydrous gel deodorant composition of the present invention can be applied topically to the skin by any known method or otherwise effective to control the malodor associated with perspiration. These methods comprise applying to the armpit or other area of the human skin a safe and effective amount of the anhydrous gel deodorant composition of the present invention. In this context, the term "safe and effective amount" means an amount of the anhydrous gel deodorant composition applied topically to the skin which is effective in masking, reducing or eliminating the odor associated with human perspiration while being safe for human use at a reasonable risk / benefit ratio. In this context, a safe and effective amount typically ranges from about 0.1 grams per armpit to about 2.0 grams per-axilla. The compositions are preferably applied to the armpit or other area of the skin once or twice a day, preferably once a day.

EXAMPLES The following examples illustrate specific embodiments of the anhydrous gel deodorant compositions of the present invention, including methods of manufacture and use, but are not intended to be limiting thereof. Other modifications may be attempted by the skilled artisan without departing from the spirit and scope of this invention. Each of the exemplified compositions are prepared by combining all the listed components, except for the gellant and the fragrance where applicable, and heating with stirring the combination of the ingredients at a temperature per the packing point of the melting point but less than 110. ° C. The gelling agent is then added while continuing the heating and stirring of the mixture until a substantially clear or translucent liquid results, at which point the liquid is cooled to a temperature of between 69 ° C and 73 ° C. The fragrance is added with agitation to the cooled liquid. The liquid containing the fragrance is then emptied into an appropriate distributor or other container and allowed to solidify by cooling to room temperature.

Table 1 The resulting compositions described in Tables 1 to 4 are gel deodorants which can then be applied topically to the axilla in an amount ranging from about 0.1 grams to about 2 grams per axilla. The applied compositions are effective to reduce, mask or eliminate the odor of perspiration, and have good skin feel characteristics during and after application. The applied compositions are gentle on the skin and cause little or no skin irritation. All exemplified amounts are percentages by weight per weight based on the total weight of the composition, unless otherwise specified.

Claims (10)

1. CLAIMS: 1. An anhydrous gel deodorant composition characterized in that it comprises: (a) from 0.001% to 50% by weight of active deodorant, fragrance, or combination thereof; (b) from 0.01% to 20% by weight of a gelling agent; (c) from 1% to 50% by weight of a non-polar volatile solvent having a solubility parameter of less than 8.0 (cal / cm 3) 0.5, a vapor pressure from 0.01 mm Hg to 6 mm Hg at 25 ° C, and an average boiling point of less than 250 ° C; and (d) from 1% to 15% by weight of a polar solvent that "has a solubility parameter from 12.5 to 25 (cal / cm3) ° '.
2. 2. The anhydrous gel deodorant composition according to Claim 1, characterized in that the composition contains less than 1% by weight of water, and wherein the gellant is an alkali metal salt of fatty acid having from 12 to 22 carbon atoms. carbon.
3. 3. The anhydrous gel deodorant composition according to any of the preceding Claims, characterized in that the non-polar volatile solvent is a volatile branched chain hydrocarbon having from 4 to 40 carbon atoms.
4. 4. The anhydrous gel deodorant composition according to Claim 3, characterized in that the composition comprises a combination of two or more volatile branched chain hydrocarbons having different molecular weights, each of which also has from 6 to 20 carbon atoms .
5. 5. The anhydrous gel deodorising composition according to claim 4, characterized in that the volatile branched chain hydrocarbon is selected from the group consisting of C13-C14 isoparaffin, C-C8 isoparaffin, Cs-Cg isoparaffin, isoparaffin of C10-Cn, isoparaffin of Cn-C? 3, isoparaffin of n-12, and combinations thereof.-
6. 6. The anhydrous gel deodorant composition, according to any of the preceding indications, characterized in that the polar solvent is selected from the group consisting of glycerin, propylene glycol, dipropylene glycol, ethanol, ripropylene glycol, butylene glycol, propylene glycol methyl ether, dipropylene glycol methyl ether. , and combinations thereof.
7. 7. The anhydrous gel deodorant composition according to any of the preceding claims, characterized in that the polar solvent comprises glycerin, the fatty acid salt is sodium stearate and the weight ratio of glycerin to sodium stearate is 0.8: 1 to 1.5: 1.
8. 8. The dehydrating composition in anhydrous gel, according to any of the preceding claims, characterized in that the deodorant active is selected from the group consisting of 0.01% to 1.0% Ten weight of triclocarbano, from 0.01% to 1.0% by weight of triclosan, and from 0.02% to 2.0% by weight of any combination thereof.
9. 9. The anhydrous gel deodorant composition according to any of the preceding claims, characterized in that the composition further comprises 0.1% to 40% by weight of a moderately polar solvent having a solubility parameter of 8.0 (cal / cm3) 0 ' 5 to less than 12.5 (cal / cm3) 0-5.
10. 10. The anhydrous gel deodorant composition according to claim 9, characterized in that the moderately polar solvent comprises 1,2-hexanediol.