FR2859907A1 - Anhydrous antiperspirant aerosol composition, for controlling axillary odor, containing lipophilic polyamide to reduce decantation rate and facilitate redispersion of active agent - Google Patents

Abstract

A novel antiperspirant composition (A) comprises an anhydrous liquid carrier containing at least one antiperspirant active agent (I), at least one lipophilic polyamide (II) of weight average molecular weight (Mw) less than 1000 and at least one propellant (III). An independent claim is included for an aerosol device, including a container containing a liquid phase containing (I) and (II), (III) and a distributor for the aerosol composition.

Description

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ANHYDROUS ANTI-THANSPIRANT COMPOSITION CONTAINING LIPOPHILIC POLYAMIDE OF LOW MOLECULAR WEIGHT; The present invention relates to an antiperspirant composition characterized by the fact that it contains in a cosmetically acceptable liquid anhydrous vehicle comprising (a) at least one antiperspirant active agent; (b) at least one lipophilic polyamide and having a weight average molecular weight (MW) of less than 1000; (d) at least one propellant.

The invention also relates to an aerosol device consisting of: (A) a container comprising a composition consisting, on the one hand, of an anhydrous liquid phase (or juice) comprising at least one antiperspirant active agent, at least one lipophilic polyamide comprising weight average molar mass (MW) of less than 1000 and (B) at least one propellant and by means for dispensing said aerosol composition.

The invention also relates to a method for treating human body odor and especially axillary with the aid of this device.

In the cosmetic field, it is well known to use, in topical application, antiperspirant products containing active substances of the anti-perspirant type to reduce, or even eliminate, generally unpleasant axillary odors.

Antiperspirant substances have the effect of limiting the flow of sweat. They generally consist of aluminum salts and / or zirconium.

In the field of antiperspirants, the most used anhydrous aerosols mainly contain a solid antiperspirant active suspended in an emollient oil through a modified clay. The proportion of phase between juice / propellant is generally in ratios of concentrations expressed in weight percent between 10190 and 25/75.

The emollient oils used have the advantage of having a good touch dry but far from pleasant when they are used in high proportion (touch too fat and oily).

This is why the rate of aerosol anhydrous antiperspirant is generally less than 25%. In these conditions, the touch is dry and pleasant but the asset rate and therefore the effectiveness of the product can not be high.

The anhydrous antiperspirant aerosols currently on the market are confronted with various formulation problems that do not make it possible to satisfactorily combine good cosmetic properties and good antiperspirant efficacy.

Anhydrous antiperspirant aerosols are subject to environmental regulations that limit the possibility of using large quantities of propellants. The propellants usually used are VOC (Volatil Organic Compounds) known for their harmful effects on the environment.

In order to have good cosmetic properties (dry touch), the ratio between the juice and the propellant must be as low as possible. Under these conditions, the level of antiperspirant active introduced in anhydrous aerosol formulas is found at a rate too low to ensure a very good antiperspirant activity of the products.

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Anhydrous antiperspirant aerosols known from the prior art generally contain modified clay suspending agents. However, decantation of the antiperspirant active is often rapid and can lead to non-homogeneous product deliveries. On the other hand, the sedimentation cake of the antiperspirant active which is formed at the bottom of the container is often difficult to redisperse after stirring or even stick to the bottom.

In order to incorporate the maximum of antiperspirant active antiperspirant aerosols anhydrous generally contain a high rate of volatile oil which does not allow to have an optimized final cosmetics.

There is therefore still a need to find new antiperspirant aerosol anhydrous formulations which, at lower propellant levels, make it possible to obtain both better efficacy and good cosmetic properties without the disadvantages set out above. On the subject, the Applicant has now discovered, unexpectedly and surprisingly, that using in a aerosol antiperspirant composition a lipophilic polyamide having a weight average molecular weight (MW) of less than 1000, aerosol compositions were obtained. antiperspirant anhydrides which may contain lower levels of propellant, larger amounts of antiperspirant active in which the sedimentation times in active are substantially longer and the qualities of touch are significantly better. In addition, the antiperspirant active aggregates that can form at the bottom of the container are easily redispersed in the juice after a few agitations even after 1 month of storage.

This discovery is the basis of the present invention.

An object of the invention is therefore an antiperspirant composition characterized in that it contains in a cosmetically acceptable liquid anhydrous vehicle: (a) at least one antiperspirant active agent; (b) at least one lipophilic polyamide having a weight average molecular weight (MW) of less than 1000, (c) at least one propellant.

The second subject of the present invention is a method of using such a composition to prevent or attenuate the development of body sweat odors.

By "anhydrous" is meant, in the sense of the invention, a composition whose content of free or added water is less than 3% and preferably whose added water content is less than 1% by weight relative to the total weight of the composition.

By "polyamide" is meant any organic compound comprising in the main carbon chain at least two amide groups. This concept includes diamides (difunctional compounds) and polymers comprising in the backbone several amide functions. The polyamides of the invention may be in the form of a mixture of diamides or a mixture of polymers comprising in the backbone several amide functions. The polymers according to the invention can be obtained by polycondensation of dicarboxylic acid monomers and of diamine monomers.

By "lipophilic polyamide" is meant by any diamide or polyamide polymer compound comprising at least one terminal lipophilic chain and / or a lipophilic side chain bonded to one of the amide groups and which may be:

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 a carbon chain, in particular a hydrocarbon chain, having from 8 to 60 carbon atoms, optionally functionalized, and better still from 12 to 40 carbon atoms, this chain being in particular an alkyl or alkoxy chain, a silicone chain of the polyorganosiloxane type, comprising optionally C1 to C30 alkyl radicals or more preferably C6 to C24 alkyl radicals or phenyl radicals,; the hydrocarbon chain or the silicone chain which may be fluorinated or perfluorinated, ie all or part of the hydrogen atoms may be substituted by a fluorine atom - or a mixture of these lipophilic chains.

The carbon chain and the alkyl or alkoxy radicals may be linear, branched, saturated or unsaturated and may be cyclic or non-cyclic.

The lipophilic polyamides of the composition of the invention advantageously have a softening temperature greater than 65 ° C. and up to 190 ° C. It preferably has a softening temperature ranging from 70 ° to 130 ° C. These polymers are in particular non-waxy and / or non-crystalline polymers.

Advantageously, the lipophilic polyamides according to the invention comprise a weight average molecular weight of greater than 200, and better still greater than 250, or even greater than 290.

(si diamine cyclique) avec Ri désignant un radical alkyle linéaire ou ramifié ayant de 1 à 50 atomes de carbone et mieux de 2 à 40 atomes de carbone, comme par exemple l'éthylène diamine, la propylène diamine, le 1,6-diamino hexane, le cyclohexane diamine, l'isophorone diamine, la 2 méthyl-1,5 pentane diamine, le 1,12-diamino dodécane, la phénylène diamine (y compris les isomères 1,2 ou 1,3 ou 1,4), comme par exemple l'adamantane diamine, et (ii) au moins un monoacide carboxylique de formule R2-COOH où R2 désigne un groupe alkyle, linéaire ou ramifié ou cyclique, saturé ou non comprenant au moins 8 atomes de carbone, en particulier de 8 à 60 atomes de carbone (par exemple de C12 à C40), comme par exemple l'acide décanoïque, dodécanoïque (laurique), hexadécanoïque (palmitique). The lipophilic polyamides of low molecular weight according to the invention are chosen in particular from A) the diamides which result from the amidification reaction between: (i) a diamine of any kind of formula

(if cyclic diamine) with R 1 denoting a linear or branched alkyl radical having from 1 to 50 carbon atoms and better still from 2 to 40 carbon atoms, for example ethylene diamine, propylene diamine, 1,6-diamino hexane, cyclohexane diamine, isophorone diamine, 2-methyl-1,5-pentane diamine, 1,12-diamino dodecane, phenylene diamine (including 1,2- or 1,3- or 1,4-isomers), as for example adamantane diamine, and (ii) at least one monocarboxylic acid of formula R2-COOH where R2 denotes a linear or branched or cyclic alkyl group, saturated or unsaturated, comprising at least 8 carbon atoms, in particular 8 at 60 carbon atoms (for example from C12 to C40), such as, for example, decanoic, dodecanoic (lauric), hexadecanoic (palmitic) acid.

This carboxylic monoacid preferably has, in addition, at least one hydroxyl group such as, for example, 12-hydroxystearic acid.

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Si la réaction comporte deux monoacides différents du type respectivement : R2-COOH et R3-COOH, (avec R3 différent de R2, représentant un groupe alkyle en C8 à C60 tel que défini pour R1), le produit résultant est un mélange de :

Dans une variante d'obtention du composé polyamide lipophile, ce dernier peut résulter de la trans-amidification entre : (a) une diamine telle que précisée ci-dessus (point i) et, (b) un monoacide du type huile ou ester gras comportant au moins un groupe ester d'acide carboxylique ayant un groupe alkyle R2 en C8 à C60 par exemple en C12 à C40, linéaire, ramifié, cyclique, saturé ou non. A titre d'exemple on peut citer les esters de monoacides aliphatiques mono hydroxylés insaturés tels que les esters de l'acide ricinoléique (ou acide 12-hydroxy (cis) 9-octadécénoïque) comme le ricinoléate de butyle, le ricinoléate d'octyl dodécyle, le ricinoléate de cétyle, le tri ricinoléate de glycéryle (huile de ricin) ; les esters de monoacides aliphatiques mono hydroxylés linéaires saturés tels que : les esters de l'acide lactique comme le lactate d'isostéaryle, le lactate issu d'alcool en C12-C13, le lactate d'octyl dodécyle, le lactate d'oléyle, le lactate de myristyle, le palmitate d'éthyl 2 hexyle ; les esters de l'acide 12-hydroxy octadécanoïque (ou 12hydroxy stéarique) comme le 12-hydroxy stéarate d'éthyl 2-hexyle, le 12-hydroxy stéarate d'octyl docécyle, le 12-hydroxy stéarate d'isostéaryle, le 12-hydroxy stéarate d'isodécyle, le tri 12-hydroxy stéarate de glycéryle (ou huile de ricin hydrogénée), l'hexa 12-hydroxy stéarate de dipentaérythrityle ; et leurs mélanges. If the reaction comprises only one mono acid of the R2-COOH type, the resulting diamide is obtained as follows:

If the reaction comprises two different monoacids of the type respectively: R2-COOH and R3-COOH, (with R3 different from R2, representing a C8-C60 alkyl group as defined for R1), the resulting product is a mixture of:

In a variant for obtaining the lipophilic polyamide compound, the latter may result from the trans-amidification between: (a) a diamine as specified above (point i) and (b) a monoacid of the oil or fatty ester type; comprising at least one carboxylic acid ester group having a linear, branched, cyclic, saturated or unsaturated C 8 to C 60, for example C 12 to C 40, alkyl group. By way of example, mention may be made of unsaturated monohydroxylated aliphatic monoacid esters such as esters of ricinoleic acid (or 12-hydroxy (cis) 9-octadecenoic acid), such as butyl ricinoleate and octyl dodecyl ricinoleate. cetyl ricinoleate, glyceryl tri ricinoleate (castor oil); saturated linear monohydroxylated aliphatic monoacid esters such as: esters of lactic acid such as isostearyl lactate, lactate derived from C12-C13 alcohol, octyl dodecyl lactate, oleyl lactate, myristyl lactate, ethyl 2 hexyl palmitate; esters of 12-hydroxy octadecanoic acid (or 12-hydroxy stearic acid) such as ethyl 2-hexyl 12-hydroxy stearate, octyl docecyl 12-hydroxy stearate, isostearyl 12-hydroxystearate, 12-hydroxy-stearic acid, isodecyl hydroxy stearate, glyceryl 12-hydroxy stearate (or hydrogenated castor oil), dipentaerythrityl hexa 12-hydroxy stearate; and their mixtures.

Hydrogenated monohydroxy esters are preferably used, in particular triglycerides generally, preferably hydrogenated, such as hydrogenated castor oil or hydrogenated 14-eicosenoic acid (auxirolic acid).

In the case of the reaction between a triglyceride and a diamine of the type + H2N-R, -NH2, the following compounds can be obtained:

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+ produits d'hydrolyse partielle complétant ceux indiqués précédemment

B) Ceux polymériques comportant plus de deux groupes amides et qui peuvent résulter de l'amidification entre : (i) une diamine de formule H2N - R, - NH2 telle que définie précédemment, (ii) un diacide HOOC - R4 - COOH (ou un mélange de diacides) avec R4 représentant (CH2)n où n vaut de 8 à 60 (notamment 12 à 40), un groupement aryle ou encore alkyle aryle ayant de 6 à 40 atomes de carbone. A titre d'exemple on peut citer les acides linéaires tels que l'acide adipique ou sébacique ou les acides aromatiques tels que l'acide phtalique, l'acide téréphtalique, les dimères d'acides gras, (iii) au moins un monacide R2 - COOH tel que défini précédemment (point A (ii)) Le produit final a alors pour structure :

avec x valant de 0 à 4 ; lorsque x = 0, cela signifie qu'il n'y a pas de réaction avec un diacide du type HOOC - R4- COOH.

+ partial hydrolysis products supplementing those indicated above

B) Those polymers having more than two amide groups and which may result from amidification between: (i) a diamine of formula H 2 N - R 2 --NH 2 as defined above, (ii) a diacid HOOC - R 4 --COOH (or a mixture of diacids) with R4 representing (CH2) n where n is from 8 to 60 (especially 12 to 40), an aryl group or alkyl aryl having from 6 to 40 carbon atoms. By way of example, mention may be made of linear acids such as adipic or sebacic acid or aromatic acids such as phthalic acid, terephthalic acid, fatty acid dimers, (iii) at least one monacid R2 - COOH as defined above (point A (ii)) The final product then has the structure:

with x being 0 to 4; when x = 0, this means that there is no reaction with a HOOC-R4-COOH diacid.

avec a allant de 1 à 18 et y allant de 1 à 10. C) compounds containing an amide group comprising silicone parts which can be obtained by reacting (i) a diamine comprising silicone groups, for example of the type (A).

with a ranging from 1 to 18 and ranging from 1 to 10.

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In this case, the Si-O groups are then found in the polymeric backbone; or a polydimethylsiloxane (PDMS) having only one functional end in the reaction mixture, this end may be a carboxylic acid, amine or epoxy group with (ii) one or more carboxylic acids defined above.

et est notamment commercialisé sous le nom de Cray Vallac SF ou Cray Vallac MT par la société Cray Valley Limited. As an example of a compound corresponding to formula (A), mention may be made of the product Tegomer A-Si 2122 sold by the company Goldschmidt; As an example of amine-group PDMS usable in the invention, mention may be made of KF-864 and KF-865 products from Shin Etsu. As examples of PDMS epoxy group usable in the invention, mention may be made of the products KF-100T and KF-101 from Shin Etsu and as an example of PDMS containing a carboxylic acid group that can be used in the invention, mention may be made of X-products. According to a particularly preferred form of the invention, a diamide resulting from the amidation of a hydroxylated fatty acid triglyceride having from 12 to 30 carbon atoms with a diamine such as those defined will be used. above in the presence of a C12 to C40 monocarboxylic acid. This compound is in particular that described in EP-A-0 984 025. The triglyceride is in particular ricinoleic acid (or castor oil) and the monocarboxylic acid is 12-hydroxystearic acid. The diamine is in particular ethylene diamine. Such a product is structured

and is especially marketed under the name of Cray Vallac SF or Cray Vallac MT by Cray Valley Limited.

The antiperspirant compositions according to the invention preferably contain the lipophilic polyamide (s) in amounts ranging from 0.001% to 10% by weight relative to the total weight of the composition and preferably from 0.1% to 5% by weight.

The antiperspirant active agents present in the compositions of the invention are preferably chosen from aluminum and / or zirconium salts; complexes of zirconium hydroxychloride and of aluminum hydroxychloride with an amino acid, such as those described in US-3792068 commonly known by the name "ZAG complexes." Such complexes are generally known by the name ZAG ( when the amino acid is Glycine.) The ZAG complexes usually have a quotient AI / Zr ranging from about 1.67 to 12.5 and a quotient Metal / CI ranging from about 0.73 to 1.93. Among these products, mention may be made of aluminum zirconium octachlorohydrex GLY, aluminum zirconium pentachlorohydrex GLY, aluminum zirconium tetrachlorohydrate GLY and aluminum zirconium trichlorohydrate-GLY.

Among the aluminum salts, mention may be made of aluminum chlorohydrate, chlorohydroxyl aluminum, chlorohydroxyl aluminum PEG, aluminum chlorohydrex PG, aluminum dichlorohydrate, aluminum dichlorohydrex PEG, aluminum dichlorohydrex PG, aluminum sesquichlorohydrate, aluminum sesquichlorohydrex PEG, aluminum sesquichlorohydrex PG, alum salts, aluminum sulfate, aluminum zirconium

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 octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate and more particularly the aluminum hydroxychloride marketed by the company REHEIS under the name REACH 301 or by the company Guilini Chemie under the name ALOXICOLL PF 40 .

Examples of aluminum and zirconium salts are those marketed by REHEIS under the name REACH AZP-908-SUF.

The antiperspirant active agents may be present in the composition according to the invention in an amount of about 0.001 to 30% by weight relative to the total composition, and preferably in a proportion of about 0.1 to 25% by weight.

The propellant may be chosen from dimethyl ether; volatile hydrocarbons such as n-butane, propane, isopropane, n-butane, isobutane, pentane and isopentane, and mixtures thereof; volatile fluorinated hydrocarbons such as 1,1-difluoroethane and 1,1,1-trifluoro-2-fluoroethane.

It is also possible to use as propellant carbon dioxide, nitrous oxide, nitrogen or compressed air.

The composition containing the antiperspirant active agent (s) and the propellant (s) may be in the same compartment or in different compartments in the aerosol container.

According to the invention, the concentration of propellant generally varies from 5 to 90% by weight pressurized and more preferably from 15 to 60% by weight relative to the total weight of the pressurized composition.

The cosmetic composition according to the invention may thus be in the form of a lotion, a cream or a fluid gel distributed as an aerosol spray, and may contain in this respect the ingredients generally used in this type of product and well known to the man of the art. 'art.

The dispensing means, which forms a portion of the aerosol device, is generally constituted by a dispensing valve controlled by a dispensing head, itself comprising a nozzle through which the aerosol composition is vaporized.

The container containing the pressurized composition may be opaque or transparent. It may be glass, polymeric material or metal, optionally covered with a layer of protective varnish.

In addition to the antiperspirant active agent (s), the composition according to the invention may also contain at least one additional deodorant active agent.

Among the additional deodorant active agents, mention may be made, for example, of zinc pyrrolidone carboxylate (more commonly known as zinc pidolate), zinc sulphate, zinc chloride, zinc lactate, zinc gluconate and zinc phenol sulphonate. 2,4,4'-trichloro-2'-hydroxydiphenyl ether (Triclosan), 2,4-dichloro-2-hydroxydiphenyl ether, 3 ', 4', 5'-trichlorosalicylanilide, 1- (3 ', 4') dichlorophenyl) -3- (4'-chlorophenyl) urea (Triclocarban) or 3,7,11-trimethyldodeca-2,5,10-trienol (Farnesol); quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts; chlorhexidine and salts; diglycerol monocaprate, diglycerol monolaurate, glycerol monolaurate; salts of polyhexamethylene biguanide.

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The preferred active ingredients are 2,4,4'-trichloro-2'-hydroxydiphenyl ether (Triclosan); salts of polyhexamethylene biguanide (known as polyaminopropyl biguanide salts) - for example the product Cosmocil CQTM (Zeneca); 3,7,11-trimethyldodeca-2,5,10-trienol (Farnesol).

The cosmetically acceptable anhydrous liquid vehicle generally contains one or more silicone or hydrocarbon emollient oils, which are volatile or non-volatile. These emollient oils are especially described in US Patents 4,822,596 and US 4,904,463.

The emollient oils according to the invention may be chosen from products of the volatile silicone type, non-volatile silicones and other non-volatile emollients.

Volatile silicones are defined in a known manner as volatile compounds at room temperature. Among these compounds, mention may be made of cyclic and linear volatile silicones of the dimethylsiloxane type whose chains comprise from 3 to 9 silicone residues. Preferably cyclomethicones D4.D5 or D6 are chosen.

Nonvolatile silicones are defined in a known manner as compounds with low vapor pressure at ambient temperature. Among these compounds are included: polyalkylsiloxanes, in particular linear polyalkylsiloxanes, for example linear polydimethylsiloxanes, or dimethicones, marketed by Dow Corning under the name Dow Corning 245 Fluid; polyalkylarylsiloxanes, for example polymethylphenylsiloxanes, sold by Dow Corning under the name Dow Corning 556 Fluid; polyether and siloxane copolymers, for example dimethicone copolyols.

Among the non-volatile emollient oils that can be used in the present invention, mention may be made, for example, of hydrocarbon derivatives, mineral oils, fatty alcohols, esters of C3-C18 alcohols with C3-C18 acids, esters benzoic acid with C12-C18 alcohols and mixtures thereof, C2-C6 polyols preferably selected from glycerol, propylene glycol or sorbitol, polymers of polalkylene glycol.

The emollient oils are preferably present in amounts ranging from 1 to 50% by weight and more preferably from 5 to 40% by weight relative to the total weight of the composition.

In order to prevent or reduce the phenomenon of cake formation or sedimentation of the astringent salt in the aerosol container, a suspension agent is preferably used which is preferably selected from hydrophobic modified montmorillonite clays such as hydrophobic modified bentonites or hectorites. Mention may be made, for example, of the product Stearalkonium Bentonite (CTFA name) (reaction product of bentonite and quaternary ammonium chloride stearalkonium chloride), such as the commercial product sold under the name Tixogel MP 250 by the company Sud Chemie Rheologicals, United Catalysts Inc. or the product Disteardimonium Hectorite (CTFA name) (reaction product of hectorite and distearyl dime) sold under the name Bentone 38V by Elements Specialties.

The suspending agents are preferably present in amounts ranging from 0.1 to 5% by weight and more preferably from 0.2 to 2% by weight relative to the total weight of the composition.

The compositions according to the invention may additionally contain at least one organic powder.

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Among the fillers that may be used according to the invention, mention may be made of organic powders. In the present application, organic powder is understood to mean any solid that is insoluble in the medium at room temperature (25 ° C.).

Organic powders that may be used in the composition of the invention include, for example, polyamide particles and especially those sold under the names ORGASOL by Atochem; polyethylene powders; microspheres based on acrylic copolymers, such as those made of ethylene glycol dimethacrylate / lauryl methacrylate copolymer sold by Dow Corning under the name Polytrap; polymethyl methacrylate microspheres, sold under the name MICROSPHERE M-100 by the company Matsumoto or under the name COVABEAD LH85 by the company Wackherr; ethylene-acrylate copolymer powders, such as those sold under the name FLOBEADS by Sumitomo Seika Chemicals; expanded powders such as hollow microspheres and in particular microspheres formed of a terpolymer of vinylidene chloride, acrylonitrile and methacrylate and sold under the name EXPANCEL by the company Kemanord Plast under the references 551 DE 12 (particle size distribution). about 12 m and density 40 kg / m 3), 551 DE 20 (particle size about 30 m and density 65 kg / m 3), 551 DE 50 (particle size about 40 m), or the microspheres marketed under the name MICROPEARL F 80 ED by the company Matsumoto; powders of natural organic materials such as starch powders, especially corn starch, wheat or rice, crosslinked or otherwise, such as starch powders crosslinked with octenylsuccinate anhydride, sold under the name DRY -FLO by the company National Starch; silicone resin microbeads such as those sold under the name Tospearl by the company Toshiba Silicone, in particular Tospearl 240; amino acid powders such as the Lauroyllysine powder marketed under the name Amihope LL-11 by the Ajinomoto Company; the particles of microdispersion of wax, which preferably have average dimensions of less than 1 m and especially ranging from 0.02 m to 1 m, and which consist essentially of a wax or a mixture of waxes, such as products marketed under the name Aquacer by the company Byk Cera, and in particular: Aquacer 520 (mixture of synthetic and natural waxes), Aquacer 514 or 513 (polyethylene wax), Aquacer 511 (polymeric wax), or such as the products marketed under denomination Jonwax 120 by the company Johnson Polymer (mixture of waxes of polyethylene and paraffin) and under the name Ceraflour 961 by Byk Cera (micronized modified polyethylene wax); and their mixtures. The organic powder or powders may be present for example in an amount. The cosmetic composition according to the invention may further comprise cosmetic adjuvants chosen from fatty substances, softeners, antioxidants, opacifiers, stabilizers and antifoam agents. , moisturizing agents, vitamins, perfumes, preservatives, polymers, perfumes, thickeners, or any other ingredient usually used in cosmetics for this type of application.

Of course, those skilled in the art will take care to choose this or these optional additional compounds in such a way that the advantageous properties intrinsically attached to the cosmetic composition in accordance with the invention are not, or not substantially, impaired by the addition or additions envisaged. .

The fatty substances may consist of an oil or a wax or a mixture thereof, petroleum jelly, paraffin, lanolin, hydrogenated lanolin or acetylated lanolin; they also include fatty acids, fatty alcohols such as lauryl alcohol, cetyl alcohol, myristic alcohol, stearic acid, palmitic alcohol, oleic alcohol and 2-octyldodecanol, fatty acid esters such as glycerol monostearate, sodium monostearate and the like.

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 polyethylene glycol, isopropyl myristate, isopropyl adipate, isopropyl palmitate, octyl palmitate, C12-C15 fatty alcohol benzoates (Finesolv TN from FINETEX), polyoxypropylene-myristyl alcohol 3 moles of propylene oxide (WITCONOL APM from WITCO), triglycerides of C6-C18 fatty acids such as caprylic / capric acid triglycerides.

The oils are chosen from animal, vegetable, mineral or synthetic oils and in particular hydrogenated palm oil, hydrogenated castor oil, liquid petrolatum, paraffin oil, purcellin oil (octanoate stearyl), silicone oils and isoparaffins.

The waxes are chosen from animal, fossil, vegetable, mineral or synthetic waxes. These include beeswax, carnauba wax, candelilla wax, sugar cane, japan, ozokerites, montan wax, microcrystalline waxes, paraffins, waxes and silicone resins.

The thickeners, preferably nonionic, may be selected from guar gums and modified or unmodified celluloses such as hydroxypropyl guar gum, cetylhydroxyethylcellulose, silicas such as for example Bentone Gel MiO sold by the company NL INDUSTRIES or the Veegum Ultra, sold by POLYPLASTIC.

The amounts of these various constituents that may be present in the cosmetic composition according to the invention are those conventionally used in anhydrous antitranspirant aerosols.

The present invention also relates to an aerosol device consisting of a container comprising an aerosol composition consisting of an anhydrous liquid phase (or juice) comprising (a) at least one antiperspirant active agent; at least one lipophilic polyamide having a weight average molecular weight (MW) of less than 1000 and (c) at least one propellant as defined above and by means for dispensing said aerosol composition.

The present invention also relates to a cosmetic process for treating human axillary odors, comprising applying to the axillary surface an effective amount of a composition as defined above.

Another object of the invention is the use of a lipophilic polyamide as defined above in an anhydrous antitranspirant composition packaged in an aerosol, as an agent for slowing down the settling time of the antiperspirant active ingredient. The invention is the use of a lipophilic polyamide as defined above in an anhydrous antitranspirant composition packaged in an aerosol, as an agent for facilitating the redispersion of the active antiperspirant active ingredient in the composition after stirring said composition.

 Another object of the invention is the use of a lipophilic polyamide as defined above in an anhydrous antiperspirant composition packaged in an aerosol, as an agent for improving the feel after application of said composition.

 Concrete but non-limiting examples illustrating the invention will now be given.

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Examples Four formulation examples were made.

Example 1 above not forming part of the invention is the reference formula without lipophilic polyamide.

Examples 2,3 according to the invention are aerosols with 80% propellant and Example N 4 is an aerosol with 50% propellant.

The procedure of the various formulations is as follows: The solvents, the diamide according to the invention and the hydrophobically modified clay are introduced and then stirred with Turax until homogenization. The aluminum salt (antiperspirant) is then added with stirring. The propellant is then conventionally introduced, for example, according to the process described in patent EP 570 085.

Formulas 1 to 4 are manufactured in 100mL glass aerosols and are filled to the third (33.3 gr). A mark is made at the liquid marker in the pressurized glass aerosol and 1 cm below this level.

The amounts of the various ingredients present in Examples 1 to 4 in percentages by weight.

Ingredients Example Example Example Example
N 1 N 2 N 3 N 4 (except invention)
Diamide (Cray Vallac SF) 0 1 1. 5 3 Stearalkonium Bentonite sold 0. 5 0. 5 0. 5 1 under the name Tixogel MP 250 by
South-Chemie Rheologicals,
United Catalysts Inc.

Aluminum Hydrochloride 7 7 5 15
Isobutane 80 80 80 50
Triethylcitrate 1.4 1.4 1.4 1.4
Isopropyl palmitate 3 3 3 3
Silicone D5 sold under the name 8. 1 7. 1 8. 6 26. 6
Dow Corning 245 Fluid by Dow Corning
Several measurements are made after 24 hours such as the appearance of the dispersion, the settling time. The ease of redispersion of the cake after
30 days

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 Description of the tests: A Sensory evaluation test A sensory test is carried out on a panel of 5 volunteers by performing the following steps: 1 Prewashing of the hands with a high frequency soap (lab) 2. We weigh the aerosol and spray at 15 cm of the hand for 2 seconds. The aerosol is spotted and the amount of spray is noted.

3. The following cosmetic criteria are evaluated: - Creamy touch (the deposit with a cream aspect) - Overall appreciation (non-greasy, non sticky, dry and pleasant touch) Between each test, the hands are washed with the soap frequency.

The evaluation of each of the criteria is done on a scale of 0 to 10: The quality of the touch includes the creamy touch and the global appreciation. This note refers to the quality sought for an antiperspirant aerosol (dry, non-greasy, non-tacky) enhanced by a creamy side.

B Settling time after 24 hours: After 24 hours at rest, the aerosol is strongly agitated, the settling time is defined when the decantation front passes the mark to 1 cm.

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C- Ease of redispersion of the cake after 30 days: After a month left to rest without agitation, the ability to redisperse the cake at the bottom of the aerosol is measured by manual agitation. The notation for quantizing the ease of redispersing the cake is done subjectively.

Very easy: redispersion without much agitation.

Easy: redispersion after 1 to 2 strong agitations. (Normal use of the product) Slightly difficult: redispersion after 3 to 4 strong agitations Difficult: redispersion after 5 to 7 strong agitations.

Very difficult: redispersion after 7 to 10 strong agitations. Some fragments are not redispersed.

Impossible: After 10 strokes of strong agitations, the cake remains stuck to the bottom.

The results of the various tests are shown in the following table:

<Tb>
<tb><SEP> Properties Example <SEP> Example <SEP> Example <SEP> Example
<tb> N 1 <SEP> N 2 <SEP> N 3 <SEP> N 4
<tb> (out
<tb> invention)
<tb> Quality <SEP> of <SEP> touch <SEP> No <SEP> Very <SEP> Very <SEP> Satisfactory
<tb> Satisfactory <SEP> Satisfactory <SEP> Satisfactory
<tb> Sensation <SEP> of <SEP> creamy <SEP> 4.9 <SEP> 8.2 <SEP> 9.1 <SEP> 9. <SEP> 6
<tb> Overall <SEP> rating <SEP> 5.5 <SEP> 8.25 <SEP> 7 <SEP> 6.5
<tb> Time <SEP> from <SEP> Decantation <SEP> to <SEP> 24 <SEP> 35 <SEP> 206 <SEP> 240 <SEP> 306
<tb> hours <SEP> (in <SEP> seconds)
<tb> Easy <SEP> of <SEP> Redispersion <SEP> of <SEP> Difficult <SEP> Easy <SEP> Easy <SEP> Slightly
<tb> cake <SEP> after <SEP> 30 <SEP> days <SEP> difficult
<Tb>
It is observed that the compositions 2 to 4 anhydrous aerosols according to the invention containing the lipophilic diamide have a better feel than the composition 1 without diamide and even at substantially lower propellant levels (50% instead of 80%) and higher emollient oil levels.

It is observed that the compositions 2 to 4 anhydrous aerosols according to the invention containing the lipophilic diamide have the advantage of having a settling time after 24 hours substantially longer than the composition 1 without diamide.

After 1 month left standing, the cake found at the bottom of the aerosol of compositions 2 to 4 is redispersible more easily than that of composition 1.

Claims (32)

1. Antiperspirant composition characterized in that it contains in a cosmetically acceptable liquid anhydrous vehicle: (a) at least one antiperspirant active; (b) at least one lipophilic polyamide having a weight average molecular weight (MW) of less than 1000. (c) at least one propellant. 2. The composition of claim 1 wherein the lipophilic polyamide (s) have a softening temperature greater than 65 C. 3. Composition according to claim 1 or 2, wherein the lipophilic polyamide (s) have a softening temperature up to 190 C. 4. The composition of claim 2 or 3, wherein the lipophilic polyamide (s) have a softening temperature ranging from 70 to 130 C. 5. Composition according to any one of claims 1 to 4, wherein the lipophilic polyamide (s) have a weight average molecular weight greater than 200, and more preferably greater than 250, or even greater than 290. 6. Composition according to any one of claims 1 to 5, wherein the one or more lipophilic polyamide (s) are chosen from the diamides which result from the amidification reaction between: (i) a diamine of any kind of formula

 with R 1 denoting a linear or branched alkyl radical having from 1 to 50 carbon atoms and better still from 2 to 40 carbon atoms, and (ii) at least one carboxylic monoacid of formula R 2 -COOH where R 2 denotes a linear or branched or cyclic, saturated or unsaturated with at least 8 carbon atoms, in particular from 8 to 60 carbon atoms. 7. The composition according to claim 6, wherein the diamine is chosen from ethylene diamine, propylene diamine, 1 , 6-diamino hexane, cyclohexane diamine, isophorone diamine, 2-methyl-1,5-pentane diamine, 1,12-diamino dodecane, phenylene diamine. 8. The composition of claim 7, wherein the diamine is ethylene diamine 9. Composition according to one of claims 6 to 8, characterized in that the carboxylic monoacid comprises at least one hydroxyl group. <Desc / Clms Page number 15> 10. Composition according to one of claims 6 to 9, characterized in that the carboxylic monoacid comprises at least one carboxylic acid ester group having an alkyl group R2 C8 to C60 and in particular C12 to C40, linear, branched , cyclic, saturated or not. 11. Composition according to Claim 10, characterized in that the carboxylic monoacid is chosen from unsaturated monohydroxylated aliphatic monoacid esters; saturated linear monohydroxylated aliphatic monoacid esters; their mixtures. 12. Composition according to Claim 10, characterized in that the carboxylic monoacid is chosen from hydrogenated monohydroxy esters and in particular triglycerides: 13. Composition according to any one of Claims 6 to 12, characterized in that the lipophilic polyamide is a diamide resulting from amidification of a C12-C30 hydroxylated fatty acid triglyceride with a diamine in the presence of a C12 to C40 monocarboxylic acid. 14. A composition according to claim 13, characterized in that the diamine is ethylenediamine, the monocarboxylic acid is 12-hydroxystearic acid and the triglyceride is ricinoleic acid (or castor oil). 15. Composition according to claim 14, characterized in that the diamide is the compound of formula:

 16. A composition according to any one of claims 1 to 5, wherein I or the lipophilic polyamide (s) are chosen from the polymers resulting from amidification between: (i) a diamine of formula H 2 N - R 1 - NH 2 with R denoting a linear or branched or cyclic alkyl radical having from 1 to 50 carbon atoms and more preferably from 2 to 40 carbon atoms, (ii) a HOOC - R4 - COOH diacid (or a mixture of diacids) with R4 wherein n is from 8 to 60 (especially 12 to 40), an aryl group or an aryl group having from 6 to 40 carbon atoms. By way of example, mention may be made of linear acids such as adipic or sebacic acid or aromatic acids such as phthalic acid, terephthalic acid, fatty acid dimers, (iii) at least one monacid R2 - COOH wherein R 2 denotes a linear or branched or cyclic alkyl group, saturated or unsaturated with at least 8 carbon atoms, in particular from 8 to 60 carbon atoms, 17. Composition according to any one of claims 1 to 5 , wherein the lipophilic polyamide (s) are chosen from polymers comprising silicone portions resulting from amidification between: (i) a diamine comprising silicone groups or a polydimethylsiloxane having only one functional end in the reaction mixture, this end may be a carboxylic acid, amine or epoxy group with <Desc / Clms Page number 16>  (ii) one or more carboxylic acids as defined in the preceding claims. 18. Composition according to any one of claims 1 to 17, wherein the lipophilic polyamide (s) are present in amounts ranging from 0.001% to 10% by weight relative to the total weight of the composition and preferably from 0.1 to 5% by weight. 19. Composition according to any one of claims 1 to 18, wherein the antiperspirant active agent (s) are chosen from aluminum and / or zirconium salts; complexes of zirconium hydroxychloride and aluminum hydroxychloride and an amino acid. 20. Composition according to any one of claims 1 to 17, wherein the antiperspirant active agent (s) are present in the composition according to the invention in a proportion of approximately 0.001 to 30% by weight relative to the total composition, and preferably at about 0.1 to 25% by weight. 21. Composition according to any one of claims 1 to 17, wherein the propellant (s) are (s) chosen from dimethyl ether; volatile hydrocarbons; volatile fluorinated hydrocarbons; carbon dioxide; nitrous oxide; nitrogen or compressed air. 22. Composition according to any one of claims 1 to 17, wherein the propellant concentration varies from 5 to 90% by weight pressurized and more preferably from 15 to 60% by weight relative to the total weight of the pressurized composition. 23. Composition according to any one of claims 1 to 22, additionally containing an additional deodorant active. 24. Composition according to any one of claims 1 to 22, wherein the anhydrous liquid vehicle comprises at least one silicone or hydrocarbon emollient oil, volatile or non-volatile. 25. The composition of claim 24, wherein the emollient oil is a volatile silicone. 26. The composition according to claim 25, wherein the volatile silicone is a tetrameric or pentamer cyclomethicone. 27. A composition according to any one of claims 24 to 26, wherein the oil or the emollient oils are preferably present in amounts ranging from 1 at 50% by weight and more preferably from 5 to 40% by weight relative to the total weight of the composition. 28. Composition according to any one of claims 1 to 27, additionally containing at least one suspending agent. 29. The composition of claim 28, wherein the suspending agent is selected from hydrophobic modified montmorillonite clays. 30. The composition of claim 29, wherein the suspending agent is Stearalkonium Bentonite. 31. The composition of claim 29 or 30, wherein the suspending agents are present in amounts ranging from 0.2 to 2% by weight relative to the total weight of the composition. <Desc / Clms Page number 17> 32. Composition according to any one of claims 1 to 31, additionally containing at least one organic powder. 33. A composition according to any one of claims 1 to 31, further containing a cosmetic adjuvant selected from fats, softeners, antioxidants, opacifiers, stabilizers, antifoam agents, moisturizers, vitamins , perfumes, preservatives, polymers, perfumes, thickeners. 34. An aerosol device consisting of: (A) a container comprising a composition consisting, on the one hand, of an anhydrous liquid phase (or juice) comprising at least one antiperspirant active agent, at least one lipophilic polyamide comprising having an average molecular weight by weight (MW) less than 1000 and (B) at least one propellant and by means for dispensing said aerosol composition. 35. Cosmetic process for treating human axillary odors, comprising applying to the axillary surface an effective amount of a composition according to any one of Claims 1 to 33. 36. Use of a lipophilic polyamide having a weight average molecular weight (MW) of less than 1000 as defined in any one of the preceding claims in an anhydrous antitranspirant composition packaged in an aerosol form, as an agent for slowing the reaction time. decantation of the antiperspirant active. 37. Use of a lipophilic polyamide having a weight average molecular weight (MW) of less than 1000 as defined in any one of the preceding claims in an aerosol-treated anhydrous antiperspirant composition as an agent to facilitate redispersion of the antiperspirant active in the composition after stirring thereof. 38. Use of a lipophilic polyamide having a weight average molecular weight (MW) of less than 1000 as defined in any one of the preceding claims in an anhydrous antiperspirant composition packaged in an aerosol as an agent for improving touch after application of said composition.