Silicone Oil-Free Antiperspirants II

Abstract

The present invention relates to a cosmetic antiperspirant composition offering good efficacy without silicone oils. The present invention further relates to a cosmetic method for reducing sweat and / or body odor secreted by perspiration using a composition according to the invention.

Description

Title of the invention: Silicone oil-free antiperspirants II

[0001] The present invention relates to a cosmetic antiperspirant composition offering good efficacy without silicone oils. The present invention further relates to a cosmetic method for reducing sweat and / or body odor secreted by perspiration using a composition according to the invention.

[0002] Washing, cleaning, and caring for one's own body is a basic human need, and modern industry is constantly striving to meet these needs in a variety of ways. The permanent elimination, or at least the reduction, of body odor and underarm perspiration is particularly important for daily hygiene. Many specific deodorizing or antiperspirant body care products are known in the current state of the art, which have been developed for use in areas of the body with a high density of sweat glands, especially in the underarm area. These are formulated in a wide variety of delivery methods, for example, as powder, stick, aerosol spray, pump spray, roll-on liquid or gel, cream, gel, and flexible impregnated substrates (deodorizing wipes).

[0003] Cosmetic antiperspirants in the current state of the art contain, in addition to at least one oil or wax and an odoriferous component or perfume, at least one antiperspirant compound, for example in the form of aluminium and / or aluminium-zirconium salts, in particular in the form of aluminium and / or zirconium halides and / or hydroxyhalides.

[0004] To provide the consumer with a pleasant sensation on the skin, antiperspirants and deodorants generally contain silicone oils. Deca-methylcyclopentasiloxane, in particular, is frequently used. Furthermore, these silicone oils have the advantage of being volatile, so they do not leave any stains or greasy film on the user's clothing. In addition, the volatility of these silicone oils allows the antiperspirant aluminum salt to be released so that it can only exert its effect when it interacts with sweat. However, the volatility of silicone oils means that white stains may appear visibly on the user's clothing. Moreover, silicone oils are increasingly criticized for their environmental pollution.

[0005] There is therefore a need for antiperspirants and deodorants that do not pollute the environment but that, at the same time, perform well in terms of reducing perspiration or reducing body odors secreted by perspiration. Furthermore, the user's clothing must not be soiled by the application of the agent to the skin.

[0006] Surprisingly, it was discovered that an aluminium salt in combination with medium chain alkanes and tricarboxylic acid triesters and PPG-14 butyl ether is particularly effective and makes the skin particularly pleasant to the touch.

[0007] A first object of the present invention is therefore an anhydrous cosmetic composition containing:

[0008] a) 5 to 40% by weight of at least one aluminium salt,

[0009] b) 5 to 15% by weight of at least one alkyltriester of a C4 tricarboxylic acid with an alkyl alcohol in C1.4,

[0010] c) 5 to 20% by weight of at least one C5 2O alkane,

[0011] d) 5 to 20% by weight of PPG-14 butyl ether,

[0012] the composition being free of volatile silicone oils. The composition is preferably free of silicone oils, that is to say free of volatile and non-volatile silicone oils.

[0013] The cosmetic composition is an anhydrous suspension. Antiperspirant compositions are often offered in dosage forms containing metal. In these cases, the presence of water can cause corrosion of the dosage form. The composition according to the invention is therefore anhydrous. For the purposes of the present invention, anhydrous means that the water content is less than 0.5% by weight, preferably less than or equal to 0.2% by weight, and in particular less than or equal to 0.1% by weight. Most preferably, the composition contains no free water.

[0014] Preferably, at least one aluminum salt is an activated aluminum sesquichlorohydrate.

[0015] It can be administered for example in the form of an aerosol spray, a roll-on applicator or a deodorant wipe (soft soaked substrate).

[0016] The composition is free of volatile silicone oils; preferably, it is free of all silicone oils. For the purposes of the present invention, this means that the proportion of volatile silicone oils, or, in a preferred embodiment, of any silicone oil, does not exceed 0.1% by weight. The proportion of volatile silicone oils, or, in a preferred embodiment, of any silicone oil, is thus within the range of 0 to 0.1% by weight. If the cosmetic composition according to the invention contains volatile silicone oils, or, in a preferred embodiment, volatile or non-volatile silicone oils, these have not been actively added to the composition but are present as an impurity in one of the measured components.The compositions according to the invention preferably contain silicone oil as an impurity in a proportion less than or equal to 0.5% by weight, in particular from 0 to 0.1% by weight. This is not always possible. to completely avoid this type of contamination.

[0017] The term “volatile silicone oils” refers to compounds having a vapor pressure of 2.66 Pa to 40,000 Pa at 20 °C and at an ambient pressure of 1.013 hPa, preferably from 10 to 12,000 hPa, more preferably from 13 to 3,000 hPa, in particular from 15 to 500 hPa.

[0018] The term "antiperspirant" refers, according to the invention, to the reduction or decrease of perspiration from the body's sweat glands or the reduction of body odors secreted by sweat. An antiperspirant cosmetic composition within the meaning of the present invention can therefore be an antiperspirant or a deodorant. Preferably, it is an antiperspirant. It is a non-therapeutic product usable for daily personal hygiene.

[0019] If the present application contains quantity indications, these shall be expressed as percentages by weight, unless explicitly stated otherwise. Unless otherwise stated, all quantities indicated refer to the total weight of the composition according to the invention. Any added propellants are not taken into account in the composition according to the invention; therefore, unless otherwise stated, all quantities indicated refer to the total weight of the composition without propellant.

[0020] The composition according to the invention comprises at least one aluminum salt. This at least one aluminum salt may be in the form of aluminum salts and / or aluminum-zirconium salts, particularly in the form of halides and / or hydroxyhalides. For the purposes of this invention, the term "halides and / or hydroxyhalides" refers specifically to aluminum and aluminum-zirconium chlorides, bromides, and iodides, and to compounds of the formula Al(OH)yX, where X represents a halide ion in the aforementioned formulas. These are, in particular, chlorides.

[0021] Preferred antiperspirant cosmetic compositions are therefore characterized in that they contain at least one aluminum salt with a molar ratio between aluminum and chloride of 1.26:1 to 1.90:1, preferably of 1.35:1 to 1.88:1, more preferably of 1.40:1 to 1.88:1, in particular of 1.65:1 to 1.88:1. The use of aluminum salts with the molar ratios between aluminum and chloride mentioned above has proven particularly advantageous with regard to the antiperspirant effect, the reduction of residue formation and the alleviation of the sensation of dryness.

[0022] Furthermore, according to the invention, it may be preferable for the aluminum salts used to have a high chloride content. Preferred antiperspirant cosmetic compositions are therefore characterized in that they contain at least one aluminum salt with a chloride content of 5% to 35% by weight, preferably 10% to 30% by weight, preferably 15% to 25% by weight, in particular 17%. 20% by weight, relative to the total weight of the aluminum salt. The use of these salts leads to a strong antiperspirant effect and a reduction in residue formation compared to aluminum salts with different, particularly lower, chloride contents. The chloride content of aluminum salts can be determined, for example, by potentiometric titration against a silver nitrate solution as a standard.

[0023] In the context of the present invention, it has proven advantageous for the antiperspirant cosmetic composition to contain aluminum salts in an activated form, i.e., heat-activated, and in particular to have a high proportion of low molecular weight polymeric aluminum complexes (also referred to below as Al complexes). These polymeric Al complexes result from the dissociation of aluminum salts into Al(III)-aqua complexes and the subsequent formation of polymeric Al complexes with hydroxide and oxide bridges between the aluminum ions. However, high molecular weight polymeric Al complexes have a weaker antiperspirant effect than low molecular weight polymeric Al complexes.

[0024] The formation of low molecular weight Al polymer complexes can be determined, for example, by size-exclusion chromatography. This is done using a column containing silanized porous silica microspheres with a particle size of 5 µm (for example, the Agilent Zorbax PSM 60-S column, marketed by Agilent). A suitable eluent is 0.02 M HCl. When the aluminum salts used according to the invention are analyzed, 5 to 6 peaks are obtained, representing Al polymer complexes with different molecular weight ranges. Peaks 1 and 2 represent Al polymer complexes with an average molecular weight of 5,000 to 10,000 g / mol, peak 3 represents Al polymer complexes with an average molecular weight of 2,000 to 4,000 g / mol, and peak 4 represents Al polymer complexes with an average molecular weight of 500 to 1,500 g / mol.Finally, peaks 5 and 6 represent Al polymer complexes with an average molecular weight of 135 to 270 g / mol, respectively.

[0025] The area of ​​the respective peak is directly proportional to the amount of Al polymer complexes in the respective molecular weight range. Therefore, by comparing the area of ​​a peak with the total area of ​​all the peaks obtained, the proportion of Al polymer complexes in the corresponding molecular weight range can be directly determined with respect to the total amount of Al polymer complexes formed in the aluminum salt used according to the invention.

[0026] Peak 4 contains low molecular weight polymer Al complexes which are important for the antiperspirant effect. With regard to the antiperspirant effect, it is therefore advantageous according to the invention that the proportion of the surface area of ​​peak 4 be within a certain range relative to the total surface area of ​​all peak areas 1 to 5 or 1 to 6. in the chromatogram. The preferred antiperspirant cosmetic compositions according to the invention are therefore characterized in that they contain at least one aluminum salt with a peak surface area proportion of 4 to 80%, preferably 42 to 75%, more preferably 45 to 70%, and in particular 50 to 65%. The peak surface area proportion of 4 to the total surface area of ​​all peaks in the chromatogram was determined by size-exclusion chromatography using an Agilent Zorbax PSM 60S column with 0.02 M HCl as the eluent. The total surface area of ​​all peaks refers to the sum of all peaks obtained for the aluminum salt in the chromatogram. The use of such aluminum salts has proven particularly advantageous with regard to good antiperspirant efficacy in association with a silicone oil-free matrix.

[0027] At least one aluminum salt is preferably used in certain quantity ranges. It is therefore advantageous according to the invention for the cosmetic composition to contain – relative to its total weight – 8 to 38% by weight, preferably 10 to 35% by weight, more preferably 12 to 35% by weight, and in particular 15 to 30% by weight, of at least one aluminum salt. The use of the aforementioned total quantities of aluminum salt makes it possible to obtain excellent antiperspirant performance without incompatibilities with the other ingredients of the cosmetic composition according to the invention or excessive formation of residues on textiles.

[0028] As a second essential constituent (b), the antiperspirant cosmetic composition according to the invention contains at least one alkyltriester of a C4.8 tricarboxylic acid with a Cu alkyl alcohol. In particular, the tricarboxylic acid is selected from citric acid, aconitic acid, isocitric acid, and oxal-succinic acid, preferably from citric acid and isocitric acid. The C4 alkyl alcohol is selected in particular from ethanol and propanol, particularly preferably propanol. Triethyl or triprophyll esters of citric acid or isocitric acid are therefore particularly preferred. Triethyl citrate is particularly preferred.

[0029] The preferred antiperspirant cosmetic compositions according to the invention are characterized in that they contain - relative to their total weight - 5 to 15% by weight, preferably 6 to 14% by weight, more preferably 6 to 13% by weight, in particular 7 to 12% by weight of at least one alkyltriester of a C4x tricarboxylic acid with a Ci4 alkyl alcohol.

[0030] The antiperspirant cosmetic composition according to the invention contains at least one medium-chain alkane of 5 to 20 carbon atoms as a third essential component (c). The medium-chain alkane preferably has 6 to 18 carbon atoms, in particular 9 to 12 carbon atoms. If, for example, C9.12 alkanes are described, it is then a composition which contains the alkanes mentioned.

[0031] For the purposes of the present invention, alkanes are hydrocarbons having the specified chain length (number of carbon atoms). According to the invention, these alkanes may be linear, branched, or cyclic. Medium-chain alkanes are preferably linear or branched.

[0032] The preferred antiperspirant cosmetic compositions according to the invention are characterized in that they contain, relative to their total weight, 5 to 20% by weight, preferably 6 to 18% by weight, particularly 7 to 15% by weight, and most preferably 7 to 12% by weight of medium-chain alkanes. The alkanes contribute significantly to the non-greasy skin feel of the composition according to the invention.

[0033] As a fourth essential constituent (d), the antiperspirant cosmetic composition according to the invention contains PPG-14 butyl ether, i.e., a polyoxypropylene-(14)-butyl ether. PPG-14 butyl ether is a propylene glycol butyl alcohol ether, which can be characterized by the following formula: C4H9(OC(CH3)CH2)nOH, in which n is equal to 14. Due to its propylene glycol content, PPG-14 butyl ether is characterized by moderate hydrophilicity, which is very suitable for dispersing more or less hydrophilic ingredients in the cosmetic composition. In particular, salts such as the aluminum salt used according to the invention can also be dispersed in the composition by means of PPG-14 butyl ether.

[0034] The preferred antiperspirant cosmetic compositions according to the invention are characterized in that they contain - relative to their total weight - 5% by weight to 20% by weight, preferably 6% by weight to 18% by weight, more preferably 7.0% by weight to 16% by weight, in particular 7.0% by weight to 15% by weight, of PPG-14 butyl ether.

[0035] In a preferred antiperspirant cosmetic composition, components b), c) and d) are present in the composition each at a rate of 5% by weight or more, in particular each at a rate of 7% by weight or more, in each case relative to the total weight of the composition.

[0036] In a preferred embodiment, the present invention therefore discloses an anhydrous cosmetic composition containing:

[0037] a) 5 to 40% by weight of at least one activated aluminium sesquichlorohydrate,

[0038] b) 5 to 15% by weight of triethyl citrate,

[0039] c) 5 to 20% by weight of at least one C9.12 alkane,

[0040] d) 5 to 20% by weight of PPG-14 butyl ether,

[0041] the composition being free of volatile silicone oils. The composition is preferably free of silicone oils, i.e. free of silicone oils volatile and non-volatile.

[0042] If the composition according to the invention is in the form of an aerosol spray, it also contains at least one propellant. In the context of the present invention, it is preferable to use certain propellants. The advantageous antiperspirant cosmetic compositions according to the invention are therefore characterized in that they contain at least one propellant selected from the group consisting of propane, propene, n-butane, isobutane, isobutene, n-pentane, pentene, isopentane, isopentene, methane, ethane, dimethyl ether, nitrogen, air, oxygen, nitrous oxide, 1,1,1,3-tetrafluoroethane, heptafluoro-n-propane, perfluoroethane, mono-chlorodifluoromethane, 1,1-difluoroethane, tetrafluoropropene and mixtures thereof, in particular propane and / or n-butane and / or isobutane.Furthermore, it is also possible according to the invention to use mixtures of the aforementioned propellants with hydrophilic propellants, such as carbon dioxide and / or dimethyl ether.

[0043] In order to ensure sufficient sprayability and complete collection of the compositions according to the invention in this embodiment, the propellant is preferably used in certain quantity ranges. It is therefore advantageous within the scope of the present invention that the cosmetic composition contain – relative to its total weight – 40% to 90% by weight, preferably 55% to 88% by weight, more preferably 60% to 86% by weight, in particular 70% to 85% by weight of at least one propellant, in particular propane and / or n-butane and / or isobutane.

[0044] The pressure tanks for said aerosols are receptacles made of metal (aluminum, tinplate, tin), plastic, or protected or shatterproof glass, coated with plastic on its outer surface. These receptacles must be chosen based on their resistance to pressure and rupture, their corrosion resistance, their ease of filling, but also their aesthetic appearance, their handling, their printability, etc. Special internal protective varnishes ensure corrosion resistance to the cosmetic composition according to the invention contained in the pressure tank. Due to the absence of water, however, the corrosiveness of the composition is considerably reduced, so that the corresponding protective varnishes are only minimally required or not required at all.Preferably, the valves used have a valve head coated with an internal varnish, this varnish and the valve material being compatible with each other. If aluminum valves are used, the inside of the valve head can be coated, for example, with Microflex varnish. If tinplate valves according to the invention are used, the inside of the valve head can be coated, for example, with PET. (polyethylene terephthalate). The coating is not necessary in the case of the compositions according to the invention but also has no disruptive effect. For a given spraying device, the size of the aerosol droplets and their respective size distribution are determined by the ratio of the propellant to the other constituents of the cosmetic composition.

[0045] According to the invention, however, it may also be preferred that the cosmetic composition be sprayed by means of a pump spray or a pressure sprayer without propellant agent or applied by means of a rollerball applicator.

[0046] The composition according to the invention may, for example, be in the form of a suspension. To stabilize the suspension, the composition according to the invention may contain constituents that prevent or reduce sedimentation, i.e., that can improve the stability of the suspension. One, two, three, or more suitable thickeners may be added for this purpose.

[0047] The composition according to the invention may, depending on the intended use and the form of administration, comprise other constituents, in particular adjuvants. These are preferably those selected from the group consisting of solvents, perfume oils, emulsifiers, solubilizers, cosmetic oils, consistency factors, propellants, pH adjusting agents, surfactants, chelating agents, skin-cooling agents, skin-care active ingredients, waxes, preservatives, plant extracts, absorbents, and mixtures of these adjuvants.

[0048] The composition according to the invention not only has an antiperspirant effect but can also be used to mask odors. For this purpose, the composition preferably also contains at least one fragrance. The term "Fragrance" in the context of the present invention refers to substances having a molar mass of 74 to 300 g / mol that contain at least one osmophore in the molecule and possess an odor and / or aroma, i.e., they are capable of exciting the receptors of the hair cells of the olfactory system. Osmophores are groups covalently linked to the molecular backbone in the form of hydroxy, formyl, oxo, alkoxycarbonyl, nitrile, azide, etc. groups. In the context of the present invention, this refers in particular to perfume oils, perfumes, or perfume oil constituents that are liquid at 20 °C and 1013 hPa.The perfume is preferably present in an amount of 0.001% by weight to 10% by weight, in particular from 0.005% by weight to 9% by weight, more preferably from 0.1% by weight to 7% by weight, particularly preferably from 0.2% by weight to 6% by weight and in particular from 0.2% by weight to 2% by weight in the composition according to the invention, in each case relative to the total weight of the composition according to the invention.

[0049] In order to further enhance the odor-reducing effect of the composition according to In a preferred embodiment of the invention, the composition according to the invention further contains one or more deodorant active ingredients. According to the invention, the use of certain deodorant active ingredients has proven particularly advantageous. It is therefore preferred according to the invention that at least one deodorant active ingredient be chosen from the group consisting of (i) arylsulfatase inhibitors, B-glucuronidase inhibitors, aminoacylase inhibitors, esterase inhibitors, lipase inhibitors, lipoxigenase inhibitors and cystathionine-B-lyase inhibitors; (ii) α-monoalkylglycerol ethers with a C6-C22 branched or linear alkyl radical, saturated or unsaturated, possibly hydroxylated, in particular α-(2-ethylhexyl)glycerol ether, (iii) alcohols, in particular phenoxyethanol, benzylheptanol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, tropolone and butylloctanoic acid;(iv) germ-inhibiting perfume oils; (v) components with prebiotic effects; (vi) active ingredients that reduce the number of odor-causing skin germs from the Staphylococcus group, Corynebacterium bacteria, Anaerococci and Micrococci, or that inhibit their growth; (vii) zinc and silver compounds, in particular zinc phenolsulfonate, zinc ricinoleate, (-1)-octahydroxypentazinc bischloride, zinc citrate and silver lactate; (viii) sorbitan esters and lactones, in particular sorbitan caprylate and glucono-1,5-lactone; (ix) organohalogen compounds, in particular triclosan, chlorhexidine and chlorhexidine gluconate; (x) benzalkonium halides, in particular benzalkonium chloride and benzethonium chloride; (xi) quaternary ammonium compounds, in particular cetylpyridinium chloride; (xii) antimicrobial carbonates, phosphates and sulfates, in particular sodium bicarbonate, cocamidopropyl PG-dimonium chloride phosphates, disodium pyrophosphate and soy morpholinium ethosulfates; (xiii) antibiotics; (xiv) aluminium and aluminium zirconium salts; (xv) bis-pyridines, in particular octenidine; (xvi) antimicrobial acids, in particular caprylic hydroxamic acid, carnesolic acid, tartaric acid and 2-butyloctanoic acid; (xvii) polyglycerol esters, in particular polyglyceryl-3 caprylates; (xviii) and mixtures thereof, in particular phenoxyethanol and / or caprylyl glycol and / or 1,2-hexanediol and / or α-(2-ethylhexyl)glycerol ether and / or 2-butyloctanoic acid. The use of these active ingredients leads not only to the creation of an intense and long-lasting fragrance and high storage stability, but also to an intense and long-lasting deodorizing effect..

[0050] Another object of the present invention is the non-therapeutic use of the composition according to the invention to prevent and / or reduce body odor and / or body perspiration. For the purposes of the present invention, "non-therapeutic" means that the use is within the framework of daily personal hygiene without a therapeutic approach.

[0051] Yet another object of the present invention is a non-therapeutic cosmetic process intended to prevent and / or reduce body odor and / or body perspiration, wherein a cosmetic composition as described above is applied to the skin, in particular to the skin of the armpits, and remains there for at least 1 hour, preferably for at least 2 hours, more preferably for at least 4 hours, in particular for at least 6 hours.

[0052] The preferred embodiments of the present invention can be combined with one another in any way, regardless of the embodiment or object of the invention for which they have been disclosed. Thus, the preferred embodiments described for the composition apply accordingly to the use and the process, and vice versa.

[0053] The present invention is explained in a non-limiting manner in the following embodiment examples.

[0054] 1. Antiperspirant efficacy

[0055] Formulation VI (comparative example) represents a commercially available silicone oil-based suspension that can be poured into aerosol cans for use as an aerosol with a propellant (e.g., propane / butane). For the purpose of verifying antiperspirant efficacy, the propellant can be disregarded as it does not remain on the skin. Table 1 describes the compositions of the two formulations.

[0056]

[0057]

[0058] [Tables 1] E (according to the invention) VI (comparison) Activated aluminum sesquichlorohydrate (AASCH-3143, Elementis) 33.3 33.3 Cyclopentasiloxane - 43.0 C9-12 alkane (Parafol 12-97, Sasol) 10.0 - PPG-14 butyl ether (Ucon Fluid AP, Dow) 10.0 - Ethylhexyl palmitate (Tegosoft OP, Evonik) 26.6 7.0 Triethyl citate (Citrofol AI, Jun-bunzlauer) 10.0 - Bentone 38 V CG 2.5 2.5 Propylene carbonate 0.9 0.9 Perfume 6.7 6.7 Formulation VI and formulation E according to the invention were applied to defined areas on the backs of 28 test subjects (2 µl / cm²) and distributed evenly. The treated skin areas were covered with an occlusive patch for 2 hours. The application of the formulations was repeated daily for 4 consecutive days. The contralateral area in each case served as an untreated control. 72 hours after the last application, the treated areas and the untreated control areas were covered with moisture-absorbing pads. The test subjects' perspiration was then induced by their stay in an 80°C sauna. The amount of perspiration absorbed was determined gravimetrically and compared as a percentage to the untreated control area. Table 2 shows that the formulation according to the invention exhibits a greater reduction in perspiration after 72 hours compared to VL [Tables 2]. Reduction in perspiration after 72 hours: E -49.3% VI -39.9%

[0059] 2. Application Properties

[0060] Aerosol products E and V2 (Table 3) were applied to the armpit by 5 sensory experts. The sensory attributes were evaluated on a scale of 0 to 15 (see Table 4). The results in Table 4 show that, compared to V2 with C9-12 alkanes, the formulation according to the invention leads to an improvement in skin feel in terms of stickiness and oiliness.

[0061] [Tables3] E (according to the invention) V2 (comparison) Activated aluminum sesquichlorohydrate (AASCH-3143, Elementis) 33.3 33.3 C9-12 alkane (Parafol 12-97, Sasol) 10.0 PPG-14 butyl ether (Ucon Fluid AP, Dow) 10.0 10.0 Ethylhexyl palmitate (Tegosoft OP, Evonik) 26.6 36.6 Triethyl citate (Citrofol AI, Jun-bunzlauer) 10.0 10.0 Bentone 38 V CG 2.5 2.5 Propylene carbonate 0.9 0.9 Perfume 6.7 6.7

[0062] The recipes were filled at a weight ratio of 1:5.7 with the propane / butane (15 / 85) propellant in aerosol cans.

[0063] [Tables4] White residue Sticky effect Greasy effect E 1.5 5.5 8.0 V2 2.0 9.0 11.5

Claims

Demands

1. Anhydrous antiperspirant cosmetic composition containing: a) 5 to 40% by weight of at least one aluminium salt, b) 5 to 15% by weight of at least one alkyltriester of a C4-8 tricarboxylic acid with a Cw alkyl alcohol, c) 5 to 20% by weight of at least one C520 alkane and d) 5 to 20% by weight of PPG-14 butyl ether, the composition being free of volatile silicone oils.

2. Composition according to claim 1, characterized in that at least one aluminum salt is an activated aluminum sesquichlorohydrate.

3. Composition according to any one of claims 2, characterized in that at least one aluminium salt has a molar ratio of aluminium to chlorine of 1.26:1 to 1.90:1, preferably of 1.35:1 to 1.88:1, preferably of 1.40:1 to 1.88:1, in particular of 1.65:1 to 1.88:

1.

4. Composition according to claim 2 or 3, characterized in that, in the case of at least one aluminium salt, the proportion of peak 4 of a size exclusion chromatography is from 40% to 80%, in particular from 42% to 75%, preferably from 45% to 70%, more preferably from 50% to 65%.

5. Composition according to one or more of claims 1 to 4, characterized in that it contains silicone oil as an impurity in a proportion less than or equal to 0.5% by weight, in particular from 0 to 0.1% by weight.

6. Composition according to one or more of claims 1 to 5, characterized in that at least one alkyltriester of a C4_8 tricarboxylic acid with a Ci_4 alkyl alcohol is selected from triethyl or tripropyl esters of citric acid or isocitric acid, and is preferably triethyl citrate.

7. Composition according to one or more of claims 1 to 6, characterized in that at least one middle-chain alkane is a C618 alkane, in particular a C, ,2 alkane.

8. Composition according to one or more of claims 1 to 7, characterized in that components b), c) and d) are present in the composition each at a rate of 5% by weight or more, in particular each at a rate of 7% by weight or more, in each case relative to the total weight of the composition.

9. Composition according to one or more of claims 1 to 8, containing: a) 5 to 40% by weight of at least one activated aluminium sesquihydrate, b) 5 to 15% by weight of triethyl citrate, c) 5 to 20% by weight of at least one C912 alkane, d) 5 to 20% by weight of PPG-14 butyl ether, the composition being free of volatile silicone oils.

10. A non-therapeutic cosmetic process for preventing and / or reducing body odor and / or body perspiration, wherein a cosmetic composition according to any one of claims 1 to 8 is applied to the skin, in particular to the skin of the armpits, and remains there for at least 1 hour, preferably for at least 2 hours, more preferably for at least 4 hours, in particular for at least 6 hours.