MXPA99011867A - Aerosol deodorant-antiperspirant product - Google Patents

Abstract

Esta invención proporciona una composición desodorante-antitranspirante en un contenedor surtidor presurizado con un propulsor de aerosol. Los ingredientes principales de un producto típico son bicarbonato de sodio en partículas, sal astringente antitranspirante en partículas, aceite de silicona volátil, emoliente deéster carboxilado, y un agente de suspensión tal como una arcilla de hectorita hidrofóbica. Un producto desodorante-antitranspirante en aerosol de la invención tiene una fase en suspensión estable de bicarbonato de sodio en partículas y sal astringente. Las propiedades de reducción de olor y humedad del producto durante aplicación bajo el brazo son aumentadas por la forma micronizada del ingrediente de sal astringente, y por la reacción controlada de aceite volátil a emoliente en el producto.

Description

DEODORANT-ANTITRANSPIRANT PRODUCT IN AEROSOL BACKGROUND OF THE INVENTION This invention relates generally to cosmetic products having deodorant and antiperspirant activities. More specifically, this invention relates to non-aqueous aerosol deodorant-antiperspirant compositions having a bicarbonate salt content. Sodium bicarbonate has long been recognized for its deodorant properties, and has been commonly used as a household deodorant. Sodium bicarbonate sprayed alone, or sodium bicarbonate diluted with talc or other filler, has been used as an underarm deodorant as described in U.S. Patent No. 4,382,079. Other publications describing cosmetic compositions on stick containing a bicarbonate deodorant include U.S. Patent Nos. 4,822,602 and 4,832,945. However, the development of a practical and effective composition in the form of cosmetic product which has a deodorizing capacity, and which is capable of acceptance by consumers, presents many factors that are unique. Because sodium bicarbonate and potassium bicarbonate have only limited solubility in water, alcohol and other solvents, the preparation of a suitable composition to be supplied in the form of a cosmetic product has involved many processing obstacles. In addition to the problem of limited solubility, sodium bicarbonate is often incompatible with other ingredients of conventional cosmetic formulations. Other limiting factors are described in reference such as U.S. Patent No. 4,534,962. Sodium bicarbonate in solution suffers persistent degradation to carbon dioxide and sodium carbonate (a known skin irritant). Because alkali metal bicarbonate has solubility limitations, a larger amount of water is required proportionally for higher levels of bicarbonate salt in cosmetic products. As a result, less alcohol is allowed, which results in a cool wet sensation on the skin, and slow drying of an applied cosmetic product. Other product developments include aerosol suspensions which are sprayed from a pressurized container having a sodium bicarbonate content into paste particles with a liquid propellant medium. The alkali metal bicarbonate in a soluble propellant vehicle such as ethanol (0.3-15 weight percent) with approximately 90% propellant is described in British Patent No. 1, 476, 1 17. The difficulties encountered with aerosol suspensions of sodium bicarbonate or potassium include the settling and / or agglomeration of the suspended particulate phase, packing of the dispensing nozzle, a non-uniform spray pattern, non-adhesion of the bicarbonate deodorant to the sprayed skin area, and a wet spray in overlap that requires an extended drying time.

Other cosmetic products have been developed which exhibit antiperspirant activity against underarm moisture in human subjects. An antiperspirant is applied to suppress perspiration and prevent offensive odors such as an armpit odor caused by the decomposition of sweat. A popular type of antiperspirant cosmetic product is a non-aqueous aerosol formulation containing an active antiperspirant ingredient such as aluminum chlorohydrate, a carrier such as talc, an oil component for depositing and retaining the active antiperspirant ingredient on a surface of the skin. , and a liquid propellant medium. A disadvantage of non-aqueous aerosol antiperspirant products is the tendency for the formation of dust clouds in which the aerosol medium is dispensed from a pressurized container. There is a continuous interest in the development of cosmetic products that have a high level of acceptance by the consumer. In consecuenseIt is an object of this invention to provide an improved cosmetic product which is comprised of a non-aqueous liquid medium having effective amounts of active deodorant and active antiperspirant ingredients. It is another object of this invention to provide an aerosol deodorant-antiperspirant composition which is a liquid solution of organic ingredients and propellant medium, and which has a dimensionally stable suspension phase of alkali metal bicarbonate ingredient and antiperspirant salt ingredient in particles.

Other objects and advantages of the present invention will become apparent from the description and appended examples.

DESCRIPTION OF THE INVENTION One or more objects of the present invention are realized by the provision of a deodorant-antiperspirant composition in an aerosol dispenser container comprising (1) between about 1-15 weight percent of particulate alkali metal bicarbonate which has an average particle size between about 5-100 microns; (2) between about 5-25 weight percent of antiperspirant ingredient in particles having an average particle size between about 1-40 microns; (3) between about 10-25 weight percent volatile oil; (4) between about 5-20 weight percent of emollient, and the ratio of volatile oil to emollient is between about 1 -2.5: 1; (5) between about 0.5-3 weight percent of a particulate suspension agent; and (6) between about 10-60 weight percent aerosol propellant. An aerosol deodorant-antiperspirant product of the invention is usually in a substantially anhydrous state, since the presence of water tends to destabilize the suspended phase of particles, in addition to other disadvantages such as an undesirable wet sensation when the product is applied to the product. spray to the armpit of a human subject.

An effective deodorizing amount of particulate alkali metal bicarbonate is suspended in the liquid aerosol medium of an aerosol product of the invention. The alkali metal bicarbonate is preferably sodium or potassium bicarbonate or a mixture thereof. The bicarbonate salt ingredient may typically have an average particle size between about 10-250 microns. In a preferred embodiment the bicarbonate ingredient is in micronized form, and has an average particle size between about 0.5-20 microns. The present invention also contemplates the use of alkali metal bicarbonate in the form of particles which are encapsulated with an organic surface coating. An aerosol deodorant-antiperspirant product of the invention may have a suspension phase containing both encapsulated and non-encapsulated alkali metal bicarbonate particles. The said bicarbonate mixture provides both immediate and long-term deodorizing activities when sprayed on the surface of the armpit of a human subject. The alkali metal bicarbonate core matrix of the encapsulated organic particles is sodium bicarbonate or potassium bicarbonate or a mixture thereof. The average particle size of the encapsulated alkali metal bicarbonate ingredient can range from about 20-200 microns. The organic encapsulant of the coated particles typically comprises between about 5-60 weight percent of the encapsulated alkali metal bicarbonate particles. The organic encapsulant of the coated particles is selected from hydrophilic and hydrophobic film forming agents (insoluble in water), and mixtures thereof, such as hydrocolloids and polysaccharides. The term "hydrophilic" as used herein refers to an encapsulating film-forming agent which has a solubility in water of at least about two grams per one hundred grams of water at 25 ° C. The organic encapsulant may consist of 100% hydrophilic encapsulant, or 100% water-insoluble encapsulant, or any mixture thereof. The release rate of alkali metal bicarbonate after spraying aerosol on a skin surface is directly related to the hydrophilic quality of the encapsulant coating on the alkali metal bicarbonate particles. A hydrophilic encapsulant coating will sustain release of core alkali metal bicarbonate content at a faster rate than a water insoluble encapsulating coating. An organic encapsulant may comprise a hydrophilic polymer having a content between about 5-80 weight percent of a water insoluble polymer. Suitable hydrophilic encapsulants for coating alkaline metal bicarbonate particles include arabic gum. , karaya gum, tragacanth gum, guar gum, acacia gum, xanthan gum, carrageenan, alginate salt, casein, dextran, pectin, agar, sorbitol, 2-hydroxyethyl starch, 2-aminoethyl starch, maltodextrin , amylodextrin, 2-hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose salt, cellulose sulfate salt, polyvinyl pyrrolidone, polyethylene oxide, alcohol / polyvinyl acetate, and the like. The polyvinyl acetate is illustrative of a water insoluble polymer which can be included as an additional coating component to moderate the hydrophilic quality of a hydrophilic polymer coating. Suitable water-insoluble encapsulants include polyvinyl acetate, polyacrylamide, polyvinyl chloride, polystyrene, polyethylene, polyurethane, polymethacrylate, paraffin wax, carnauba wax, beeswax, stearyl alcohol, zein, shellac, edible fat, and Similar. The encapsulant can be applied to the alkali metal bicarbonate particles by conventional coating means, such as rotating disk, fluidized bed, spray drying, freeze drying, stirring, droplet precipitation (coacervation), and the like. The antiperspirant ingredient of an aerosol deodorant-antiperspirant composition of the present invention is typically a particulate astringent compound having an average particle size between about 10-35 microns the superior moisture-reducing properties are obtained if part or all of the ingredient Antiperspirant is in the form of particles having a smaller diameter of about 15 microns. The Examples demonstrate the beneficial effect of ultrafine particles of antiperspirant in the reduction of underarm moisture. Optionally, the antiperspirant ingredient can be pre-coated with a polymer to prevent interaction with the other ingredients, and to provide a sustained release antiperspirant activity under application conditions. Suitable astringent compounds include aluminum chloride, aluminum chlorohydrate, aluminum sulfocarbolate, aluminum sulfate, aluminum-zirconium hydrochloride, zinc sulfate, zinc sulfocarbolate, and zirconium hydrochloride. Preferred types of astringent compounds are aluminum chlorohydrates and aluminum-zirconium hydrochlorides, such as aluminum tetrachlorohydrex-zirconium glycine. Aluminum-zirconium glycine tetrachlorohydrex is commercially available as Rezal 36GP Superultrafine (Reheis), and Reach AZP908 (Reheis). The volatile oil ingredient of an aerosol deodorant-antiperspirant composition of the invention is preferably selected from silicone compounds and branched chain hydrocarbons. A volatile silicone oil ingredient may be a cyclic or linear polydimethylsiloxane containing between about 3-9 silicon atoms. A suitable volatile cyclic polydimethylsiloxane compound is illustrated by the formula: where n is an integer with a value of approximately 3-7. A suitable linear polydimethylsiloxane is illustrated by the formula: (CH3) 3 Si-O [Si (CH3) 2-O] n-Si (CH3) 3 where n is an integer with a value of approximately 1 -7. Volatile silicone linear compounds generally have viscosities of less than about 5 centistokes at 25 ° C, while cyclic-type compounds have viscosities of less than about 10 centistokes. Typical of the volatile silicone compounds that can be employed for purposes of the present invention is cyclomethicone, which is a cyclic dimethylpolysiloxane which conforms to the above formula wherein n has average between 3-6. Dow Corning 245 Fluid (Dow Corning) is a volatile cyclic silicone that is commercially available. The CTFA Cosmetic Ingredient Dictionary, Third Edition, (Estrin et al., Editors, The Cosmetic, Toiletry and Fragrance Association, Inc., 1982) lists cyclic silicones on page 60, under the "Cyclomethicone" entry.

One type of volatile hydrocarbon oil ingredient is preferably a C2-C20 branched chain hydrocarbon compound or mixture. Suitable volatile branched chain hydrocarbon oils include isododecane (C .2), isohexadecane (C .6), isoeicosane (C20), and the like. These types of branched chain hydrocarbons are marketed by Permethyl Corporation under trade names such as Permethyl 99A, Permethyl 101A and Permethyl 102A. An emollient is included as an essential ingredient in an aerosol deodorant-antiperspirant composition of the present invention, and is employed in a proportion balanced to the volatile oil ingredient. An effect of optimal reduction of moisture in the armpit is obtained when the ratio of volatile oil to emollient is between about 1 -2.5: 1, as demonstrated by the comparative data in the Examples. Suitable organic compounds that have utility as an emollient ingredient include carboxylate esters such as lactates, citrates, tartrates and adipates; fatty alcohols, fatty acids and fatty esters; mineral oils; non-volatile silicones; alkylene glycols and polyalkylene glycols; lanolin and lanolin esters; and the similar ones. A carboxylate ester such as diisopropyl adipate is a preferred type of emollient in an aerosol deodorant-antiperspirant composition of the invention.

Another essential ingredient of an aerosol deodorant composition of the invention is approximately 0.5-3 weight percent of a particulate suspending agent. Suitable suspending agents include colloidal silica such as pyrogenic silica having a range of particle size between about 0.001-0.03 microns; colloidal alumina; hydrophobic powders such as montmorillonite clays (eg, bentonites and hectorites) which are surface treated with a cationic surfactant such as ditallow dimethyl ammonium chloride (eg, quaternium hectorite 18, bentonite 38 by Rheox, Inc.). Other suitable suspending agents are described in publications such as British Patents 1, 476, 17; from E. U., 4,045,548; and E. U., 4,904,463; incorporated by reference. The propellant ingredient of an aerosol deodorant-antiperspirant composition of the invention is a normally liquefied gaseous medium preferably selected from the group consisting of hydrocarbons and halogenated hydrocarbons and mixtures thereof. A typical aerosol propellant is one selected from the group consisting of C3-C5 aliphatic hydrocarbons and mixtures thereof. Suitable aerosol propellants are described in publications such as U.S. Patent Nos. 3,968,203; 4,889.71 1; 4,935,224; 5, 156, 833; 5, 156, 834; 5,281, 409; and 5,368,842; incorporated by reference. An aerosol deodorant-antiperspirant product of the present invention may include other ingredients such as fragrances, bacteriostats, fungistatics, dyes, anti-inflammatory agents, antioxidants, and the like. For example, between about 0.01-0.5 weight percent of a bacteriostatic may be included as an optional ingredient. The bacteriostatic works as a deodorant by preventing bacterial generation of malodorous degradation byproducts from perspiration. Typical bacteriostatic compounds include Triclosan (Ciba-Geigy), Chloracel (Reheis Chemical Company), zinc phenolsulfonate, dichloro-m-xylenol, sodium N-lauroyl sarcosine and the like. Between about 0.1 -2 weight percent of a fragrance may be included as an optional ingredient. The selected fragrance ingredient is one that does not detrimentally affect the dimensional stability of the aerosol deodorant product, and preferably that it contributes to an effect to hide odors. Fragrances are typically organic compounds of specific type structures, which include phenolic materials, essential oils, synthetic oils, aldehydes and ketones, polycyclic compounds, esters, and alcohols. Specific fragrances are illustrated by linalyl acetate, isopropyl myristate, cedryl acetate, mycorcilyl acetate, and other compounds such as those listed in U.S. Patent 5,114,717; incorporated by reference. The fragrance ingredient can be encapsulated with a film-forming polymer such as polyvinyl acetate.

Between about 0.5-3 weight percent of a binder / carrier type powder may be included as an optional ingredient, such as microcrystalline cellulose, polyacrylamide, talc, calcium carbonate, and the like. An aerosol deodorant-antiperspirant product of the present invention can be produced by mixing the ingredients in a prescribed order of addition. In a general procedure, a concentrate is prepared by first mixing the volatile oil, suspending agent, antiperspirant, alkali metal bicarbonate, fragrance, and optional additives such as a bacteriostatic and fragrance ingredients. The concentrate is then milled under high shear conditions, and then loaded into an aerosol dispenser container. A valve is attached to the container, and the propellant is loaded into the container under pressure. Methods for producing pressurized aerosol products are described in publications such as U.S. Patent Numbers 4, 183,91 1; 4,743,440; 4,935,224; and 5, 178, 871; incorporated by reference. The following examples are further illustrative of the present invention. The specific components and ingredients are presented as typical, and various modifications can be derived in view of the foregoing description within the scope of the invention.

EXAMPLE I This Example illustrates the particle size distribution of sodium bicarbonate before and after grinding by air jet.

Commercial grade sodium bicarbonate (3DF, Church &Dwight) is processed by air jet grinding (Particle Size Technology, I nc.), And the particle size distribution of ground samples compared to unground samples is determined by means of a microtrac laser dispersion particle size analyzer. The sodium bicarbonate 3DF has an average particle size of 31.4 microns, and the micronized 3DF sodium bicarbonate has an average particle size of 9.8 microns. The 80% intermediate of the particle size distribution is between 15.4 and 55.8 microns for the sodium bicarbonate 3DF, and between 4.3 and 21.5 microns for the micronized form.

EXAMPLE II This Example illustrates the settling properties of the particulate phase in aerosol deodorizing products according to the present invention. An aerosol deodorant product of the invention is formulated with the following ingredients: INGREDIENTS AB Cyclomethicone 6.0 6.0 Diisopropyl Adipate 15.5 15.5 Bentona Gel VS5PC (1) 12.5 12.5 Reach 103-0 (2) 12.5 Reach 103 (3) 12.5 Encapsulated sodium bicarbonate (4) 2.5 2.5 Fragrance (5) 0.75 0.75 1, 1 -difluoroethane 15 15 Butane 35 35% Sweat reduction 30 37 (1) 76% cyclomethicone, 18% hydrophobically modified clay, 5% propylene carbonate; Rheox. (2) D1 0 = 10-15 microns; D50 = 25-30 microns; D = 45-55 microns (maximum = 74 microns); Reheis (Dx = x% of product that has smaller particle diameter than). (3) D10 = 2-3 microns; D50 = 8-15 microns; D = 20-30 microns (maximum = 54 microns); Reheis (4) Optimax RR; 30% by weight starch coating; average particle size of 30 microns; Encapsulation technology. (5) Fresh Scent; Takasago A concentrate is prepared by mixing the ingredients of cyclomethicone and clay, followed by the addition of ethanol, triclosan, sodium bicarbonate and fragrance. The mixture is milled under high shear conditions.

The concentrate mixture is charged to a glass aerosol bottle coated with plastic. A valve is attached to the glass bottle, and the propellant is added.

PROOF OF HUMIDITY REDUCTION Moisture reduction is evaluated using a standard gravimetric clinical method. In a typical method, 50 test subjects without abnormalities in the armpits are required to refrain from using all antiperspirant materials for at least 2 weeks before the test period. On day 1, the test subjects were placed in a chamber with controlled environment with a temperature of 37.8 ° C and a relative humidity of 35-40%. A period of 40 minutes of warm-up is allowed after entering the chamber before beginning the sweat collection. The warm-up period is immediately followed by two 20-minute collection periods in which they are placed under the armpit and pre-weighted absorbent pads are held in position during the testing periods. After these collections, the cushions are removed, reweighed and the sweat production of each armpit is calculated. Subjects with more than 300 mg of sweat production are generally included in the study. During the next three days the subjects are treated with the antiperspirant product under one arm and without the product (control) under the other arm. Twenty-four hours after the final application, the sweat production of each armpit is determined by the method described above. The sweat reduction is calculated using the following equation: Sweat reduction = 100 (control-product) / control The comparative data listed below demonstrates that each aerosol formulation A of the invention and aerosol formulation B are effective in reducing moisture under the arm of human subjects, and that an antiperspirant ingredient with a lower average particle size provides increased activity for the reduction of humidity.

EXAMPLE 1 This Example illustrates the increase of sweat reduction activity when an aerosol deodorant-antiperspirant composition of the invention has a preferred volatile oil / emollient ratio and a particulate antiperspirant with a preferred particle size. A composition of the invention is formulated with the following ingredients: I NG REDUCERS Cyclomethicone 10.7 Diisopropyl adipate 10.8 Bentona gel (1) 12.5 Reach 103 (2) 12.5 Encapsulated sodium bicarbonate (3) 2.5 Fragrance 1 .0 1, 1 -difluoroethane 15 Butane 35% Sweat reduction 44 (1) 76 % cyclomethicone, 18% hydrophobically modified clay, 5% propylene carbonate; Rheox. (2) D10 = 2-3 microns; D50 = 8-15 microns; D = 20-30 microns (maximum = 54 microns); Reheis (3) Optimax RR; Encapsulation technology.

An aerosol product of the invention is prepared, and the sweat reduction is tested, following the procedures of Example I I. In comparison with the aerosol formulation A of the invention and aerosol formulation B of Example II, the aerosol formulation C has a preferred ratio of cyclomethicone / diisopropyl adipate, and a particulate antiperspirant with a preferred average particle size, which provides a corresponding increase in sweat reduction activity.

EXAMPLE IV This Example illustrates the sweat-reducing properties of an aerosol deodorant-antiperspirant composition that is not in accordance with the present invention. An aerosol composition is prepared with the following ingredients: I NGREDIENTS D Cyclomethicone 13.2 Diisopropyl adipate 8.3 Bentona gel (1) 12.5 Reach 103 (2) 12.5 Encapsulated sodium bicarbonate (3) 2.5 Fragrance 0.75 1, 1 -difuoroethane 1 5 Butane 35% Sweat reduction 1_5 (1) 76% cyclomethicone, 18% hydrophobically modified clay, 5% propylene carbonate; Rheox. (2) D10 = 10-15 microns; D50 = 25-30 microns; D = 45-55 microns (maximum = 74 microns); Reheis (3) Optimax RR; Encapsulation technology.

An aerosol product is prepared, and the sweat reduction is tested, following the procedures of Example I I.

Compared to aerosolized A-C formulations of the invention, aerosol formulation D has a decreased sweat reduction activity due to the high cyclomethicone / diisopropyl adipate ratio, and the relatively large average particle size of the particulate antiperspirant ingredient.

EXAMPLE V This Example illustrates the preparation of effective aerosol deodorant-antiperspirant compositions with different emollient ingredients according to the present invention. Aerosol products are prepared with the following ingredients: INGREDIENTS Cyclomethicone 13.2 13.2 13.2 Isopropyl Palmipate 8.3 Isopropylamistate 7.3 C2-C5.5 alkyl benzoate 7.3 Dimethicone 1 .0 1 .0 Bentona Gel VS5PC (1) 12.5 12.5 12.5 Reach 103 (2) 12.5 12.5 Sodium bicarbonate encapsulated (3) 2.5 2.5 2.5 Fragrance 0.75 0.75 0.75 1, 1-difluoroethane 1 5 15 15 Butane 35 35 35% Sweat reduction 40 44 44 (1) 76% cyclomethicone, 18% hydrophobically modified clay, 5% propylene carbonate; Rheox. (2) D10 = 2-3 microns; D50 = 8-15 microns; D = 20-30 microns (maximum = 54 microns); Reheis (3) Optimax RR; Encapsulation technology.

The aerosol products are assembled, and sweat reduction is tested, following the procedures of Example I I.

Claims (26)

1. REVIVAL DICATIONS 1. A deodorant-antiperspirant composition in an aerosol dispenser container comprising: (1) between about 1-15 weight percent of alkaline particulate metal bicarbonate having an average particle size between about 5-100. microns; (2) between about 5-25 weight percent of antiperspirant ingredient in particles having an average particle size between about 1-40 microns; (3) between about 10-25 weight percent volatile oil; (4) between about 5-20 weight percent of emollient, and the ratio of volatile oil to emollient is between about 1 -2.5: 1; (5) between about 0.5-3 weight percent of a particulate suspension agent; and (6) between about 10-60 weight percent aerosol propellant.
2. 2. A deodorant-antiperspirant composition according to claim 1 wherein the alkali metal bicarbonate is sodium bicarbonate or potassium bicarbonate or a mixture thereof.
3. 3. A deodorant-antiperspirant composition according to claim 1 wherein the alkali metal bicarbonate particles are encapsulated with an organic surface coating.
4. 4. A deodorant-antiperspirant composition according to claim 1 wherein the alkali metal bicarbonate particles are encapsulated with a surface coating selected from the group consisting of hydrophilic and hydrophobic film-forming organic ingredients.
5. 5. A deodorant-antiperspirant composition according to claim 1 wherein the alkali metal bicarbonate particles are encapsulated with a surface coating of polysaccharide.
6. 6. A deodorant-antiperspirant composition according to claim 1 wherein the alkali metal bicarbonate ingredient is a mixture of encapsulated and non-encapsulated particles.
7. 7. A deodorant-antiperspirant composition according to claim 1 wherein the antiperspirant ingredient has an average particle size in the range between about 1-0-35 microns.
8. 8. A deodorant-antiperspirant composition according to claim 1 wherein the antiperspirant ingredient comprises an astringent metal salt.
9. 9. A deodorant-antiperspirant composition according to claim 1 wherein the antiperspirant is an ingredient selected from the group consisting of aluminum, zirconium and zinc salts, and mixtures thereof.
10. 10. A deodorant-antiperspirant composition according to claim 1 wherein the volatile oil is selected from the group consisting of silicone and branched chain hydrocarbon compounds. eleven .
11. A deodorant-antiperspirant composition according to claim 1 wherein the volatile oil ingredient comprises a cyclic or linear polydimethylsiloxane containing 3-9 silicon atoms.
12. 12. A deodorant-antiperspirant composition according to claim 1 wherein the volatile oil ingredient comprises a C2-C20 branched chain hydrocarbon.
13. 13. A deodorant-antiperspirant composition according to claim 1 wherein the emollient comprises a non-volatile ester.
14. 14. A deodorant-antiperspirant composition according to claim 1 wherein the emollient comprises a carboxylated ester selected from the group consisting of lactates, citrates, tartrates and adipates.
15. 15. A deodorant-antiperspirant composition according to claim 1 wherein the emollient comprises a non-volatile silicone.
16. 16. A deodorant-antiperspirant composition according to claim 1 wherein the emollient comprises lanolin.
17. 17. A deodorant-antiperspirant composition according to claim 1 wherein the suspending agent is selected from the group consisting of colloidal clay and silica.
18. 18. A deodorant-antiperspirant composition according to claim 1 wherein the suspending agent is hydrophobic bentonite clay.
19. 19. A deodorant-antiperspirant composition according to claim 1 wherein the suspending agent is hydrophobic hectorite clay.
20. 20. A deodorant-antiperspirant composition according to claim 1 wherein the suspending agent is pyrogenic silica. twenty-one .
21. A deodorant-antiperspirant composition according to claim 1 wherein the aerosol propellant is a normally liquefied gaseous medium selected from the group consisting of hydrocarbons and halogenated hydrocarbons and mixtures thereof.
22. 22. A deodorant-antiperspirant composition according to claim 1 wherein the aerosol propellant is selected from the group consisting of C3-C5 aliphatic hydrocarbons and mixtures thereof.
23. 23. A deodorant-antiperspirant composition according to claim 1 which contains between about 0.01-0.5 weight percent bacteriostatic as an optional ingredient.
24. 24. A deodorant-antiperspirant composition according to claim 1 which contains between about 0.1 -2 weight percent fragrance as an optional ingredient.
25. 25. A deodorant-antiperspirant composition according to claim 1 which contains between about 0.5-3 weight percent talcum or calcium carbonate as an optional ingredient.
26. 26. A deodorant-antiperspirant composition according to claim 1 which contains between about 0.5-3 weight percent microcrystalline cellulose or starch powder as an optional ingredient. RESU MEN This invention provides a deodorant-antiperspirant composition in a pressurized dispenser container with an aerosol propellant. The main ingredients of a typical product are particulate sodium bicarbonate, astringent antiperspirant particulate salt, volatile silicone oil, carboxylated ester emollient, and a suspending agent such as a hydrophobic hectorite clay. An aerosol deodorant-antiperspirant product of the invention has a stable suspension phase of particulate sodium bicarbonate and astringent salt. The product's odor and moisture reduction properties during application under the arm are enhanced by the micronized form of the astringent salt ingredient, and by the controlled ratio of volatile oil to emollient in the product.