Deodorant composition comprising zinc hydroxychloride, a trans-esterified or non-specific vegetable oil and a natural absorbent powder.

Abstract

Topical deodorant cosmetic composition, in particular in the form of a stick or cream and in particular an anhydrous stick comprising zinc hydroxychloride or one of its hydrates, a vegetable oil with a kinematic viscosity of less than 1000 cSt based on triglycerides, hydrogenated or not, transesterified or not and an absorbent powder insoluble in water of mineral or vegetable origin, preferably a starch or a microcrystalline cellulose and optionally comprising triethyl citrate and / or vegetable butters and / or vegetable waxes and / or hydrocarbons of triterpenic origin. Process for treating the skin and in particular the armpits using this composition to reduce or eliminate perspiration odors.

Description

Title of the invention: Deodorant composition comprising zinc hydroxychloride, a trans-esterified or non-specific vegetable oil and a natural absorbent powder.

[0001] The action of sweating is an essential mechanism in the life of human beings. During the hot periods of summer, or under clothing in other seasons, there would be a risk of an increase in body temperature. This risk is counterbalanced by the phenomenon of perspiration which ensures the thermoregulation of our body at 37 degrees and eliminates certain metabolic waste. Indeed, when sweat evaporates through the pores of the skin, heat is evacuated and the temperature of the skin and the body drops. Sweat is produced by sweat glands, which are of two types: eccrine glands and apocrine glands. Eccrine glands produce sweat that is mainly composed of water and salt, but apocrine glands produce perspiration rich in proteins, sebum, and fatty substances. The substances produced by these sweat glands are in themselves odorless or have little odor. However, when certain bacteria present on the surface of the human body (Corynebacteria, Propionibacterium, Staphylococci, etc.) come into contact with the sweat produced by the apocrine glands, they destroy the compounds and thus produce other compounds such as, for example, short saturated or unsaturated fatty acids such as caprylic, capric, valerianic, 3-methylhex-2-enoic acids, and thus generate a perspiration odor. This sweat odor is unpleasant. It can be accentuated by the presence of hair, which traps secretions and provides a breeding ground for bacteria. This is why armpits are a prime location for the development of these unpleasant sweat odors. These perspiration odors can be added to a background body odor of genetic, environmental or metabolic origin (diseases). These odors can be a real social or individual nuisance. There is therefore a need to combat these body odors to reduce or even eliminate them using deodorants or antiperspirants. Several methods can be considered. One of these methods consists of acting on the quantity of sweat emitted by reducing this emission, in particular by an astringent or inflammatory effect tightening the pores of the skin. We then speak of antiperspirant active ingredients. Classically, aluminum salts (chlorides, sulfates, etc.) or mixed aluminum salts ( double aluminum and potassium sulfate or alum, mixed aluminum and zirconium salts, etc.), which are effective but are suspected of not being very safe. We can also act on the bacterial flora via antibacterial compounds such as certain essential oils (sometimes irritating or sensitizing) or certain probiotics. Finally, we can act on the odorous molecules themselves, either by encapsulating them (for example with cage molecules...), or by neutralizing them (for example with sodium bicarbonate which has the disadvantage of a high pH), or by absorbing them (for example by using talc or plant powders). Furthermore, the various compositions used to date are either insufficiently effective, or of doubtful safety, particularly in the long term, or generate harmful side effects such as the bleaching or yellowing of clothing covering the armpits in particular, or as insufficient application qualities on the skin or its appendages. Furthermore, the compounds used in these compositions do not always have a satisfactory ecological impact. There is therefore a real need for new deodorant compositions with good efficacy, good safety, good ecological impact and few or no side effects.

[0002] For this purpose, the applicant recommends topical deodorant cosmetic compositions comprising (a) zinc hydroxychloride or one of its hydrates (b) at least one vegetable oil with a kinematic viscosity at a temperature of 20°C of less than 500 cSt, based on triglycerides and trans-esterified or not and (c) at least one absorbent powder insoluble in water of natural origin. The applicant also recommends a topical deodorant cosmetic composition comprising: (a) at least one compound chosen from zinc hydroxychloride or its hydrates, (b) at least one vegetable oil with a kinematic viscosity at a temperature of 20°C of less than 500 cSt, based on triglycerides and trans-esterified or not and (c) at least one water-insoluble absorbent powder of natural origin. For the purposes of the present invention, the term "deodorant cosmetic composition" means a cosmetic composition aimed at reducing or eliminating unpleasant body odors and not containing antiperspirant active ingredients in the form of salts containing aluminum and / or zirconium. Topical means a composition intended to be applied to the surface of the body. Triglyceride-based vegetable oil means a vegetable oil in which triglycerides represent the largest weight fraction of the product. By water-insoluble is meant a compound whose solubility in water at tem room temperature (20 to 25°C) and atmospheric pressure (1.013 x 105 Pa) is less than 0.1% by weight. By kinematic viscosity at a temperature of 20°C less than 500 cSt we mean that the oil (b) has at a temperature of 20°C and at atmospheric pressure (1.013 x 105 Pa), as such, a kinematic viscosity less than 500 centistokes or cSt (1 cSt is equivalent to 1 mm2 / s). This viscosity can be determined using a variety of viscometer models. These include the SVM range of viscometers from ANTON PAAR. The determination can be carried out by referring for example to the ASTM D445 standard. For the purposes of the present invention, the term absorbent powder means a powder capable of absorbing at least 100% of its own weight of water at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa). The water absorption capacity according to the invention can be evaluated by the tea bag technique as mentioned in patent application WO9715367 of the company CAMELOT SUPERABSORBENTS, this via the parameter FS (Free swell liquid retention), with water absorption capacity in % = 100 x FS. This method consists of inserting a certain quantity of absorbent powder (W3 close to 0.2 g) into a water-permeable tea bag and immersing said bag in water for 10 minutes with stirring. After removing the bag from the aqueous medium, eliminating the water outside the bag, weighing the bag (W1) allows, after subtraction of a blank (W2) corresponding to a bag without absorbent powder, to determine the parameter FS. FS in g / g = ((Wl-W2) / W3) - 1

[0003] Application WO2016199905 from JFE MINERAL COMPANY LTD claims the use of basic zinc chloride such as the simonkolleite form as a therapeutic skin agent for the treatment of skin wounds and rough skin. This document provides for dressings intended to be applied to wounds or direct application to the skin and provides for the possibility of the presence in the formulation medium of numerous ingredients including vegetable oils and vegetable waxes. Nothing is specified on the viscosity of the vegetable oils. Powders are also mentioned but without indication of their solubilities, and some are either not of natural origin such as sodium polyacrylates, or are not water-absorbent powders such as iron oxide. Furthermore, no mention is ever made in this document of any effect on the non-therapeutic treatment of body odor. Basic zinc chloride Zn5(OH)8Cl2,H2O has also been claimed in dental care compositions in UNILEVER application GB2243775. These compositions are oral compositions and therefore not topical. They are described with the possible presence of essential oils of mint which are essentially composed of menthol and menthone (oxidized form of menthol) which are not triglycerides. As water-insoluble powders of natural origin, this document only mentions abrasives intended to remove dirt from teeth and some are not absorbent powders. Finally, no action against odors generated by sweat is mentioned.

[0004] Zinc hydroxychloride and its hydrates, compounds (a), correspond to the general formula: Zn! 6 OH! 8Cl! 3, (H2O)n with n denoting a number from 0 to 8 Among these products we can cite the non-hydrated product described with the formula Zn Cl OH (CAS number 55802-61-4). The product is marketed in particular by the company ANGENE CHEMICAL. The monohydrate product ( Zn5 O9 Hi0 Cl2 ) is also described with the formula Zn5 ( OH )8 Cl2, H2O ( CAS number 12167-79-2 or 11073-22-6 ). The product is marketed in particular by the companies AMERICAN ELEMENTS and PROLABIN / TEFARM (CAS 12167-79-2) or by the company KIRNS CHEMICAL (CAS 11073-22-6). Zinc hydroxychloride (hydrated or not) is sometimes called tetrabasic zinc chloride (TBZC), basic zinc chloride. It is also sometimes called zinc oxychloride. The monohydrate version of zinc hydroxychloride exists in a natural form, simonkolleite, which is a mineral whose crystals have a rhombohedral structure (trigonal-hexagonal-scalenohedral system). Zinc hydroxychloride can also be synthesized from zinc chloride in particular. It is an uncolored product. The cosmetic compositions of the invention may contain from 0.01% to 30% by weight, better still from 0.1% to 20% by weight, even better still from 0.5% to 10% by weight of zinc hydroxychloride and / or one of its hydrates, compounds (a), relative to the total weight of the composition.

[0005] The compositions of the invention comprise at least one vegetable oil based on triglycerides, trans-esterified or not (b). Triglycerides are triesters of glycerol with carboxylic fatty acids preferably comprising 8 to 30 carbon atoms and even more preferably 8 to 22 carbon atoms. These fatty acids may be saturated or unsaturated. The oils (b) of the invention have a kinematic viscosity of less than 500 cSt at a temperature of 20°C and at atmospheric pressure (1.013 x 105 Pa). Preferably, the oils of the invention have a kinematic viscosity of less than 300 cSt, better still less than 100 cSt, even better still less than 80 cSt at a temperature of 20°C and at atmospheric pressure (1.013 x 105 Pa). In a first variant of the invention, the oils (b) are non-transesterified vegetable oils. Among the non-transesterified oils of plant origin that can be used in the invention, mention may in particular be made of sweet almond oil, argan oil, avocado oil, peanut oil, camellia oil, safflower oil, calophyllum oil, rapeseed oil, copra or coconut oil, coriander oil, pumpkin oil, wheat germ oil, jojoba oil, linseed oil, macadamia oil, corn germ oil, hazelnut oil, walnut oil, vernonia oil, apricot kernel oil, olive oil, evening primrose oil, passionflower oil, grape seed oil, rosehip oil, rye oil, sesame oil, rice bran oil, soybean oil, hemp oil, sunflower oil, oat oil, baobab oil, pomegranate oil, plum oil, borage oil, safflower oil, lupin oil, pistachio oil. These oils can be used as is or in hydrogenated form. The preferred non-transesterified vegetable oils correspond to contents of unsaturated fatty acid constituent elements of triglycerides greater than 40%. Even more preferably, the vegetable oils of the invention are chosen from sweet almond oil, argan oil, avocado oil, wheat germ oil, jojoba oil, linseed oil, macadamia oil, corn germ oil, hazelnut oil, walnut oil, apricot kernel oil, olive oil, evening primrose oil, grape seed oil, sesame oil, soybean oil, hemp oil, sunflower oil, baobab oil. In a second variant of the invention, the oils (b) are trans-esterified oils. In organic chemistry, transesterification is the process of exchanging the organic group RI of an ester RCOO-R1 with the organic group R2 from an alcohol R2-OH. This alcohol can be a monoalcohol or a polyol such as a diol or triol. These reactions are often catalyzed by the addition of an acid or base catalyst. The transesterified vegetable oils are preferably chosen from copra or coconut oil, olive oil, sunflower oil, sweet almond oil, optionally hydrogenated. Preferably, the transesterification leads to esters with alkyl groups derived from C8-C18 alcohols, even more preferably C10. A product of this type is, for example, marketed in association with another ingredient under the name BIOPHYTOSEBUM OR by SOPHIM (INCI name Olive oil decyl esters & squalene). The compositions of the invention preferably comprise the oils (b) at a concentration preferably ranging from 0.1% to 65% by weight, better still from 0.5% to 60% by weight, even better still from 1% to 50% by weight relative to the total weight of the composition. The compositions of the invention comprise at least one water-insoluble absorbent powder of natural origin (c). As indicated previously, these are insoluble powders having a high water absorption capacity, at least equal to 100% of their weight. Even more preferably, this water absorption capacity is greater than or equal to 140% of their weight at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa). In a variant of the invention, these powders (c) have a mineral origin. As absorbent mineral powders according to the invention, it is possible to use in particular silicas or silica-rich powders such as perlite or diatomaceous earths as well as silicates. It will be preferable to use silicates and in particular phyllosilicates. Talc, kaolinite, attapulgites, sepiolites, smectites including montmorillonite, saponite, hectorite may be chosen. Clays containing them may also be used, such as bentonite, kaolin. Preferably, aluminosilicates and compounds containing them will be used as absorbent natural mineral powders according to the invention. In another variant of the invention, these powders (c) have a plant origin. For example, whole plants or powdered plant parts can be used. Examples include fruit, cereal and vegetable powders such as oat powder obtained from oat bran marketed by the company J. Ret-tenmaier & Sôhne under the name VITACEL CS 5 Oat (INCI name Avena Sativa Bran). Bamboo powders can also be used, particularly that obtained from the sap. Preferably, these powders of plant origin (c) will be chosen from polysaccharides and in particular from celluloses or starches. Starch is a mixture of two polymers, amylose with a PM ranging from 10,000 to 1,000,000 Daltons and amylopectin (or isoamylose) with a PM ranging from 1,000,000 to 100,000,000 Daltons, both based on D-anhydroglucopyranose units linked together by (1-4) alpha glycosidic bonds and (1-6) alpha glycosidic bonds, the latter generating short branches for amylose, longer ones for amylopectin. The starch grain generally appears in the form of semi-crystalline granules in which the amylopectin is organized into sheets, thus creating the crystalline zone, while amylose defines an amorphous zone between the different layers. The starches that can be used in the context of the invention are preferably chosen from corn, tapioca or rice starches. In particular, the products in the NATIVACARE range offered by the company INGREDION will be mentioned, and in particular the products NATIVACARE 5600, 8600, 9230, 9360 and 9330. It will also be possible to use the products in the AGRANA range from the company AZELIS, such as the products belonging to the names MAISITA, AGENAMALT, TAPIOCA NATURAL or ORGANIC. Certain starches that can be used according to the invention may be chemically modified starches such as those of the AGENAJEL name from the company AZELIS (INCI names Hydroxypropyl Starch Phosphate or Distarch Phosphate). Cellulose is a naturally occurring polymer composed of glucose units linked by a (1-4) beta glycosidic bond. The linear cellulose chains are bundled together as microfibrils that are spirally wound within plant cell walls. These microfibrils exhibit a high degree of three-dimensional internal bonding, forming a crystalline structure that is insoluble in water and resistant to reagents. There are, however, relatively small segments of the microfibril with weaker internal bonding. These are called amorphous regions.

[0006] The preferred celluloses of the invention as compounds (c) are microcrystalline celluloses. The crystalline region of the cellulose is isolated to produce microcrystalline cellulose. Microcrystalline cellulose is thus partially depolymerized pure cellulose obtained by various processes such as reactive extrusion, enzymatic mediation, mechanical grinding, ultrasonication, steam explosion and acid hydrolysis. Most often, microcrystalline cellulose is prepared from wood pulp: the pulp is cut into small particles which are chemically hydrolyzed, particularly with a mineral acid, followed by a filtration and drying step. The microcrystalline celluloses of the invention are marketed in particular by FMC Biopolymers under the name AVICEL PH 102, PH 103, PH 105, PH 112, PH 113, PH 200, PH 301, PH 302. They are also marketed by J. Rettenmaier & Sôhne GmbH & Co. under the trade name VIVAPUR 12, 14, 101, 102, 103, 105, 112, 113, 200; 301, 302 or VIVAPUR CS 9FM, 400, CS SENSORY 5S, CS SENSORY 15S, CS SENSORY 12 and by the company SEPPIC under the names CEOLUS UF-711, KG802, KG 1000, PH101, PH102 or PHF20JP, by the company Daito Kasei Kogyo Co., Ltd. under the trade name Cellulobeads USF, D5, D10, D30, D50, D100, D200, D500. The particle size of the water-insoluble absorbent powders (c) of the invention and of natural origin preferably ranges from 1 pm to 500 pm, better still from 1 pm to 250 pm, even better from 2 pm to 100 pm and most preferably from 4 pm to 50 pm. The particle size of the powders can be determined, for example, with a particle size analyzer such as the Horiba Cappa 700. The cosmetic compositions of the invention preferably comprise from 0.1 to 20% by weight, better still from 0.5 to 15% by weight, even better still from 1 to 10% by weight relative to the total weight of the composition of absorbent powders (c) insoluble in water and of natural origin.

[0007] In a preferred variant, the compositions of the invention further comprise at least one compound chosen from vegetable butters, vegetable waxes, these butters and waxes being trans-esterified or not, and hydrocarbons of triterpenic origin. These compounds are fatty substances. For the purposes of the present invention, vegetable butter or vegetable wax means a fatty substance of vegetable origin which, like vegetable oils, is based on esters but which has a solid consistency at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa), i.e. which does not flow under its own weight. The melting point of vegetable butters or vegetable waxes is preferably above 30°C, better above 35°C. In general the melting point of waxes is higher than that of butters. The melting point can be measured using a differential scanning calorimeter (DSC), for example the one offered by METTLER under the reference DSC 30. Vegetable butters are generally like vegetable oils based on triglycerides. These butters can be hydrogenated or not. They can also be trans-esterified or not. Preferably, the butters of the invention are non-transesterified. Examples include shea butter, cocoa butter, illipe butter, mango butter, babassu butter, almond butter, jojoba butter, apricot butter, pistachio butter, argan butter, avocado butter, coconut butter, olive butter, plum butter, oat butter. Vegetable waxes can be hydrogenated or not. They can also be trans-esterified or not. The vegetable waxes are preferably chosen from camauba wax, candelilla wax, rice bran wax, ouricury wax, alfa wax, cork fiber wax, sugarcane wax, Japanese wax, sumac wax, montan wax, orange wax, bay wax, apple wax, jojoba wax, rose wax, sunflower wax, olive wax, lacquer tree fruit bark wax (Rhus Ver-niciflua), soy wax. These waxes can be triglyceride based but are most often ester based long-chain fatty acids and monoalcohols and / or diols. Among the trans-esterified waxes, we can notably cite the product offered by the company GATTEFOSSE under the name LIPOCIRE ASG. The best-known hydrocarbons of triterpenic origin are C30 hydrocarbons structurally formed from the association of three C10 terpenes, hence their name. The preferred triterpene hydrocarbons of the invention are squalene and its hydrogenated version, squalane. Squalene (or spinacene or supraene) is notably present in the unsaponifiables of olive, linseed and peanut oils. Squalene and squalane are oils. Vegetable butters, vegetable waxes and hydrocarbons of triterpenic origin are present in the compositions of the invention at concentrations preferably ranging from 0.01% to 60% by weight, better still from 0.1% to 50% by weight relative to the total weight of the composition.

[0008] The compositions of the invention may also comprise additional fatty substances other than those mentioned above and in particular non-vegetable oils or waxes. Additional oils can be polar or non-polar, volatile or non-volatile (an oil is said to be non-volatile when its vapor pressure is less than 0.02 mm of mercury at atmospheric pressure and room temperature). Oils can be hydrocarbons of mineral or synthetic origin. They can also be synthetic and silicone or fluorinated. Silicone oils can be linear or branched or cyclic polydimethylsiloxanes possibly carrying aryl groups and in particular phenyl. The apolar hydrocarbon oils are preferably chosen from paraffin oil, isoparaffins (isododecane, isodecanes), linear alkanes (n-dodecane), isoeicosane, polybutylenes or polyisobutylenes, hydrogenated or not, polydecenes, hydrogenated or not. Polar oils are preferably hydrocarbon-based. They may be chosen from branched or unsaturated fatty alcohols such as oleyl alcohol and octyldodecanol. They may also be chosen from esters other than triglycerides, such as isopropyl myristate or isostearyl isosterate. Additional waxes can be hydrocarbon, silicone or fluorinated and be of natural, mineral, animal or synthetic origin. They can be polar or non-polar. Examples of non-polar waxes include paraffin waxes, ozokerite, and polyethylene waxes. The polar waxes are preferably hydrocarbon-based and even more preferably chosen from ester waxes comprising at least one ester function and alcohol waxes comprising at least one alcohol function.

[0009] The ester waxes are preferably chosen from esters of fatty acid(s) and / or fatty alcohols in solid form at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) such as myristyl myristate or stearyl stearate. The alcohol waxes are preferably chosen from fatty alcohols in solid form at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) such as cetyl alcohol or cetylstearyl alcohol. These additional fatty substances may be present at a concentration ranging from 0.01% to 50% by weight, better still from 0.1% to 20% by weight relative to the total weight of the composition.

[0010] In a preferred version, the compositions of the invention comprise one or more trialkyl citrates. The trialkyl citrates of the invention are preferably esters of citric acid whose three carboxylic acid functions are esterified by C1-C16 alkyl groups, better still C1-C5. Even more preferably trialkyl citrate and triethyl citrate. Triethyl citrate (CAS 77-93-0) is available from many suppliers. Examples include EVONIK ANTWERPEN NV, VIGON INTERNATIONAL INC, MERCK SCHUCHARDT OHG, CELLMARK. The trialkyl citrate(s) is(are) present in the cosmetic compositions of the invention at a concentration which may range from 0.01% to 20% by weight, preferably from 0.1% to 10% by weight, better still from 0.5% to 5% by weight relative to the total weight of the composition.

[0011] The compositions of the invention may comprise additional agents with deodorant activity. These additional deodorant active agents may be chosen in particular from ethanol and polyols, probiotics, alpha hydroxy acids, essential oils, triclosan, 2 methyl 5 cyclohexyl pentanol.

[0012] The compositions of the invention may contain one or more extracts of plant origin different from the compounds already mentioned. For the purposes of the present invention, an extract of plant origin means an extract containing one or more active ingredients derived from a plant or a plant secretion. Plant-based extracts can come from all types of plants belonging to the plant kingdom. They can therefore come from cryptogams but more preferably from phanerogams. In particular, they can come from trees, shrubs, green plants, flowering plants, cacti, and grasses. They can come from all parts of the plant and in particular from the roots, stems or trunks, leaves, flowers and fruits. These extracts can be soluble or insoluble in water at room temperature (20 to 25°C) and atmospheric pressure (1.013 x 105 Pa). The concentration of extracts of plant origin other than the compounds mentioned above, in the compositions of the invention, if they are present, preferably varies from 0.001% to 60% by weight, more preferably from 0.1% to 50%, better still from 0.2% to 40%, even better still from 1% to 35% by weight relative to the total weight of the composition.

[0013] In a variant of the invention, the compositions contain one or more coloring agents. These coloring agents may be water-soluble, fat-soluble dyes or insoluble pigments. These coloring agents may be of natural or synthetic, mineral or organic origin. The preferred coloring agents are of plant origin, in particular in the form of extracts such as those mentioned above.

[0014] The compositions according to the invention may comprise one or more surfactants chosen from anionic, non-ionic, cationic or amphoteric surfactants. The compositions according to the invention may further comprise one or more conventional additives well known in the art, different from the compounds defined previously. Examples of additives that can be used according to the invention include associative or non-associative, ionic or non-ionic polymers and in particular thickening polymers, UVA and / or UVB filters, softening agents, solvents, humectants, moisturizing agents, vitamins, provitamins, amino acids, perfumes, peptizing agents, preservatives, antioxidants, alkalizing or acidifying agents (in particular for regulating the pH of aqueous compositions or for salifying the ingredients), chelating agents, anti-wrinkle agents, agents for sensitive skin, anti-pollution agents, anti-blemish agents (acne, spots, shine, etc.) and slimming agents. The compositions of the invention may be aqueous or anhydrous. For the purposes of the invention, the term "anhydrous" means a composition containing at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) less than 5% water by weight, even better less than 1% water by weight relative to the total weight of the composition and preferably not containing water, in particular added water. For the purposes of the invention, the term "aqueous" means a composition containing at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) from 5% to 99.5% of water by weight relative to the total weight of the composition. If the compositions of the invention contain water, they comprise at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) of preferably from 5 to 80%, better still from 5% to 70% by weight relative to the total weight of the composition. In a variant of the invention, the compositions are aqueous. They can then be in the form of solutions, gels, emulsions or compact solids. Emulsions can be oil-in-water (O / W), water-in-oil (W / O) or multiple emulsions. They can lead to creams or milks. In another variant of the invention, the compositions are anhydrous. They can then be in the form of powders, thickened or unthickened oils, pastes or compact solids. These compositions can be packaged in bottles with or without pumps, jars, tubes, aerosols, roll-ons and / or airless packaging. The compact solid form is a preferred form of the invention. By compact solid, we mean, in the sense of the present invention, a product at least solid at its periphery at room temperature (20 to 25°C) and at atmospheric pressure (1.013 x 105 Pa) which does not flow spontaneously like a powder. We can speak of a self-supporting structure which retains its predetermined shape over time. The compact solid is most often in the form of a stick. This stick can be entirely solid and of homogeneous structure or can optionally comprise a liquid core surrounded by a solid shell or be in the form of a solid core surrounded by a solid shell of a different nature from that of the core. The section of the stick can be of any shape, including rectangular, circular or oval. The outer surface of the stick can be beveled or domed. Preferably, the hardness at 20°C and at atmospheric pressure (1.013 x 105 Pa) of the stick is greater than 25 Nm1 and less than 500 Nm1, better still greater than 30 Nm 1 and less than 400 Nm1, even better still between 35 Nm 1 and 200 Nm1. This hardness can be measured using a DFGHS 2 dynamometer from the company Indelco-Chatillon. In a preferred version, the compositions of the invention are in the form of anhydrous sticks.

[0015] The invention also covers a method of treating the skin, in particular the armpits, to eliminate or reduce perspiration odors, consisting of applying thereto a topical deodorant composition as described above without subsequent rinsing. The application is done dry, the composition being capable of forming an adherent deposit on the skin without requiring prior contact with another composition, for example aqueous.

[0016] [Examples]

[0017] The examples below illustrate the invention without, however, limiting its scope. Example 1 The composition described in Table 1 below is that of an anhydrous stick intended to be applied to the skin, particularly in the armpits. This stick is made up of ingredients that give it good safety and low ecological impact as well as a pleasant application. After application, it significantly reduces perspiration odors while avoiding other harmful side effects such as bleaching or yellowing of clothes.

[0018] [Tables 1] Ingrédient Nom INCI Fournisse ur Quantité en g pour 100 g de composition Niodor Zinc Chloride Hydroxide CellMark 4,5 JD Jojoba Colorless Oil Simmondsia Chinensis (Jojoba) Seed Oil SAFIC ALCAN 45 VIVAPUR CS Sensory 5S Microcrystalline Cellulose JRS 4 Triethyl Citrate Triethyl Citrate CellMark 5 Beurre de Mangue Mangifera indica seed butter SOPHIM 1 Berry jelly Ricinus Communis Seed Oil, Rhus Vemiciflua Peel Cera / Rhus Succedanea Fruit Cera, Tocopherol KahlWax 5 Rice Bran Wax Oryza Sativa (Rice) Bran Wax KahlWax 11 Sunflower Wax Helianthus Annuus (Sunflower) Seed Wax KahlWax 3 Candelilla wax Euphorbia Cerifera Cera KahlWax 11 Berry wax Rhus Vemiciflua Peel Cera / Rhus Succedanea Fruit Cera KahlWax 10 Covi-Ox T-90 EU C Tocopherol BASF 0,1 Parfum 0,4

[0019] Similar results are obtained by replacing weight for weight the microcrystalline cellulose VIVAPUR CS Sensory 5 S with the oat powder VITACEL CS 5 Oat (INCI Name Avena Sativa Bran) proposed by the company J. Rettenmaier & Sôhne or with the tapioca starch NATIVACARE 9330 (INCI Name Tapioca Starch) from the company Ingredion., or with the mineral kaolin powder Imercare Opaque (INCI Name Kaolin) from the company Imerys.

[0020] Similarly, similar results are obtained by replacing 35g of the 45g of JD Jojoba Colorless OU with 35g of Biophytosebum OR (INCI Olive oil decyl esters & squalene) from the company SOPHIM.

[0021] Example 2 The composition described in Table 2 below is that of an aqueous cream intended to be applied to the skin, particularly in the underarms. This cream is made up of ingredients that give it good safety and low ecological impact as well as a pleasant application. After application, it significantly reduces perspiration odors while avoiding other harmful side effects such as bleaching or yellowing of clothes.

[0022] [Tables 2] Ingrédient Nom INCI Fournisse ur Quantité en g pour 100 g de composition Niodor Zinc Chloride Hydroxide CellMark 4,5 JD Jojoba Colorless Oil Simmondsia Chinensis (Jojoba) Seed Oil SAFIC ALCAN 10 VIVAPUR CS Sensory 5S Microcrystalline Cellulose JRS 4 Triethyl Citrate Triethyl Citrate CellMark 5 Lipocire A SG CIO-18 Triglycérides Gattefoss é 2 Emulium Dolcea MB Cetearyl Alcohol (and) Glyceryl Stéarate (and) Jojoba Esters (and) He-lianthus Annuus (Sunflower) Seed Wax (and) Sodium Stearoyl Glutamate (and) Water (and) Polyglycerin-3 Gattefoss é 4 SP-Crodacol C90-MBAL Cetyl alcohol Croda 2 Keltrol CG-BT Xanthan Gum CP Kelco 0,5 Hydrolite 5 Butylène Glycol Symrise 3 Glycerin Glycerin 3 Citric acid Citric acid 0,25 Covi-Ox T-90 EU C Tocopherol BASF 0,1 Nipaguard SCE Sorbitan Caprylate (and) Pro-panediol (and) Benzoic Acid Clariant Internatio nal Ltd. 1 Fragrance 0,15 Water, deionised Aqua Qsp 100

[0023] Similar results are obtained by replacing weight for weight the microcrystalline cellulose VIVAPUR CS Sensory 5 S with the oat powder VITACEL CS 5 Oat (INCI Name Avena Sativa Bran) proposed by the company J. Rettenmaier & Sôhne or with the tapioca starch NATIVACARE 9330 (INCI Name Tapioca Starch) from the company Ingredion., or with the mineral kaolin powder Imercare Opaque (INCI Name Kaolin) from the company Imerys.

[0024] Similarly, similar results are obtained by replacing 35g of the 45g of JD Jojoba Colorless Oil with 35g of Biophytosebum OR (INCI Olive oil decyl esters & squalene) from the company SOPHIM.

[0025] Comparative Example 3

[0026] The composition described in Table 1 of Example 1 is produced by replacing the 45 g of jojoba oil with 45 g of castor oil (kinematic viscosity at 20°C greater than 500 cSt) marketed by the company Croda under the name Seatons Castor Oil (INCI Name: Ricinus Communis (Castor) Seed Oil). Unlike the stick of Example 1, the stick obtained with castor oil, outside the invention, has poor application properties. The application is in fact unpleasant because it is very difficult with a lack of slip. Furthermore, the deposit of product on the skin is low.

Claims

Claims

1. Topical deodorant cosmetic composition comprising: (a) at least one compound chosen from zinc hydroxychloride or its hydrates, (b) at least one vegetable oil with a kinematic viscosity at a temperature of 20°C of less than 500 cSt, based on triglycerides and transesterified or not and (c) at least one water-insoluble absorbent powder of natural origin.

2. A composition according to claim 1 wherein (a) is a compound of formula Zn i.6 OH [Cl i_3> (H2O)n, n being a number ranging from 0 to 8, compound (a) preferably being a zinc hydroxychloride monohydrate of formula Zn5 O9 Hi0 Cl2 or Zn5 (OH)8 Cl2, h2o

3. Composition according to claims 1 or 2 in which the zinc hydroxychloride or its hydrates (a) is or are present at a concentration ranging from 0.01% to 30% by weight, better still from 0.1% to 20% by weight, even better still from 0.5% to 10% by weight relative to the total weight of the composition.

4. Composition according to any one of the preceding claims in which the vegetable oils (b) are non-trans-esterified vegetable oils, preferably chosen from sweet almond oil, argan oil, avocado oil, wheat germ oil, jojoba oil, linseed oil, macadamia oil, corn germ oil, hazelnut oil, walnut oil, apricot kernel oil, olive oil, evening primrose oil, grape seed oil, sesame oil, soybean oil, hemp oil, sunflower oil, these non-trans-esterified vegetable oils being able to be hydrogenated.

5. Composition according to any one of claims 1 to 3 in which the oils (b) are chosen from trans-esterified oils, preferably leading to esters with alkyl groups derived from C8-C18 alcohols.

6. Composition according to any one of the preceding claims in which the vegetable oils (b) are present at a concentration ranging from 0.1% to 65% by weight, better still from 0.5% to 60% by weight, even better still from 1% to 50% by weight relative to the total weight of the composition.

7. Composition according to any one of the preceding claims comprising at least one water-insoluble absorbent powder (c) of mineral origin, preferably chosen from phyllosilicates, better still from aluminosilicates.

8. Composition according to any one of claims 1 to 6 comprising at least one water-insoluble absorbent powder (c) of plant origin, preferably chosen from fruit, cereal or vegetable powders, starches and microcrystalline celluloses, better still from starches and microcrystalline celluloses.

9. Composition according to any one of the preceding claims in which the particle size of the powders (c) ranges from 1 pm to 500 pm, better still from 1 pm to 250 pm, even better still from 2 pm to 100 pm.

10. Composition according to any one of the preceding claims in which the water-insoluble absorbent powders of natural origin (c) represent from 0.1% to 20% by weight, better still from 0.5% to 15% by weight, even better still from 1% to 10% by weight relative to the total weight of the composition.

11. Composition according to any one of the preceding claims further comprising at least one compound chosen from vegetable butters, vegetable waxes or hydrocarbons of tri-terpenic origin, the butters or waxes being trans-esterified or not, the butters preferably being chosen from shea, cocoa, illipe, mango, babassu, almond, jojoba, apricot, pistachio, argan, avocado, coconut, olive, plum and oat butters, the waxes preferably being chosen from camauba, candellila, rice bran, ouricury, alfa, cork fiber, sugar cane, japan, sumac, montan, orange, bay, apple, jojoba, rose, sunflower, olive, bark of the tree lacquer, soy and hydrocarbons of triterpenic origin being preferably chosen from squalene and squalane.

12. Composition according to claim 11 in which the vegetable butters, the vegetable waxes and the hydrocarbons of triterpenic origin are present at a concentration ranging from 0.01% to 60% by weight, better still from 0.1% to 50% by weight relative to the total weight of the composition.

13. Composition according to any one of the preceding claims comprising at least one trialkyl citrate, preferably triethyl citrate.

14. Composition according to claim 13 in which the trialkyl citrate(s) are present at a concentration ranging from 0.01% to 20% by weight, better still from 0.1% to 10% by weight, even better still from 0.5% to 5% by weight. weight relative to the total weight of the composition.

15. Composition according to any one of the preceding claims, characterized in that it is anhydrous or aqueous.

16. Composition according to any one of the preceding claims in the form of a stick or a cream, preferably in the form of an anhydrous stick.

17. Method for treating the skin and in particular the armpits to reduce or eliminate perspiration odors, consisting of applying to the substrate to be treated a composition according to any one of claims 1 to 16 without subsequent rinsing.