WO2021170223A1

WO2021170223A1 - Antiperspirant active emulsion

Info

Publication number: WO2021170223A1
Application number: PCT/EP2020/054957
Authority: WO
Inventors: Ana Karen ZAVALA RAYA; Cecile Ratschow; Juan Carlos PEREZ PULIDO; Gauthier Denis Pierre LAMBERT; Ilka Oelrichs
Original assignee: Beiersdorf Ag
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2021-09-02

Abstract

The present invention belongs to the cosmetic field and relates to a cosmetic water in oil emulsion in stick form.

Description

ANTIPERSPIRANT ACTIVE EMULSION

The present invention belongs to the cosmetic field and relates to an emulsion which forms an antiperspirant stick.

Solid cosmetic antiperspirant sticks which are in a form of an oil in water emulsion are commonly known by the person skilled in art.

E.g. the document WO 2006/012971 A1 discloses low-residue antiperspirant sticks on the basis of an oil in water dispersion. The stick compositions disclosed comprise an oil phase, emulsifier, an aqueous phase and aluminum components, which act as antiperspirant active material.

Additionally WO2017/162443 A1 discloses cosmetic antiperspirant sticks in form of an oil in water dispersion with improved from stability.

Furthermore, WO 2012/080017 A2 discloses in the examples 1.1 to 1.7 various antiperspirant sticks on the basis of an oil in water dispersion.

A different kind of solid antiperspirant stick known by the person skilled in art are formulated as water in oil dispersion. These are known for example from US20140193471 A1.

The pure fact that the person skilled in art knows a few antiperspirant sticks in form of an oil in water or water in oil dispersion shall not obscure the fact that these prior art sticks suffer a number of disadvantages.

One particular disadvantage is directed to the re-solidification properties of antiperspirant sticks if being exposed to elevated temperatures after production. This may occur for example if the sticks are transported in a lorry and the lorry is exposed to the sun.

Once the sticks are exposed to elevated temperatures the sticks start to melt and liquefy. At this stage, it is essential that once the sticks are moved to a location having an ambient temperature, at which the sticks become solid again, homogeneous sticks are formed again. However, it is most often observed that the sticks do not solidify at all as a separation of the aqueous and oil phase is observed. In other cases antiperspirant active ingredients, such as aluminum salts, and particulate materials, such as talc, precipitate. That may lead to varying concentration of those ingredients across the stick. Consequently, the consumer might be disappointed from the product upon use, if only a section with minor quantities of antiperspirant active ingredient is applied. Thus, the composition would need to be homogenized again to ensure comparable concentration of the ingredients across the stick.

Another drawback of many antiperspirant sticks is that it is often observed that small crystals are formed on the surface of the sticks. These crystals may adversely affect the appearance of the stick such that customers may not want to use it any more.

Accordingly, there is a general need for stick compositions which do not suffer at least some of the disadvantages described above.

It was surprisingly found by the applicant that the drawbacks can be addressed by the present invention.

The present invention is an antiperspirant water in oil emulsion comprising, calculated to the total weight of the emulsion, a) at least one antiperspirant active aluminum compound; b) Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate; c) at least one lipid and/or wax component with a melting point of >50° C; d) at least one oil which is liquid at 20° C; e) at least one fatty acid having 12 to 20 carbon atoms and f) 22% to 40% by weight water.

All the weight percentages (% by weight) given below are based, unless otherwise stated, on the total weight of the emulsion of the invention. If ratios of certain components are disclosed in the following description, these ratios refer, unless otherwise stated, to weight ratios of the components.

Unless otherwise stated, all tests and measurements were performed under “normal conditions”. The term "normal conditions" refers to 20°C, 1013 hPa and a relative humidity of 50%.

The term “skin” refers solely to human skin. It was surprisingly found that the emulsion of the present invention does not suffer the disadvantages of the prior art.

According to the present invention the emulsion comprises at least one antiperspirant active aluminum compound. According to the invention it is preferred if this aluminum compound is selected from the group consisting of aluminum chlorohydrate; aluminum sesquichlorohydrate; aluminum zirconium chlorohydrates, such as aluminum zirconium trichlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium octachlorohydrate; and the aluminum zirconium chlorohydrate glycine complexes such as aluminum zirconium trichlorohydrex glycine, aluminum zirconium tetrachlorohydrex glycine, aluminum zirconium pentachlorohydrex glycine and aluminum zirconium octachlorohydrex glycine. It is in particular preferred if aluminum chlorohydrate and/or aluminum sesquichlorohydrate are contained as antiperspirant active aluminum compound.

Embodiments which are also preferred according to the invention are characterized in that only aluminum chlorohydrate, aluminum zirconium tetrachlorohydrex glycine and/or aluminum sesquichlorohydrate are contained as antiperspirant active aluminum compound.

The following description is valid for all embodiments of the invention.

It is preferred if the total quantity of the antiperspirant active aluminum compound is in the range from 5 to 30% by weight, more preferably 10 to 21% by weight and most preferably 12.5 to 18.5% by weight, calculated to the total weight of the emulsion.

It is particular preferred if aluminum chlorohydrate, aluminum zirconium tetrachlorohydrex glycine and/or aluminum sesquichlorohydrate are contained as antiperspirant active aluminum compound and the total quantity of aluminum chlorohydrate, aluminum zirconium tetrachlorohydrex glycine and/or aluminum sesquichlorohydrate is in the range from 5 to 30% by weight, more preferably 10 to 21% by weight and most preferably 12.5 to 18.5% by weight, calculated to the total weight of the emulsion.

It is of particular advantage if aluminum chlorohydrate is contained as antiperspirant active aluminum compound and the total quantity of aluminum chlorohydrate is in the range from 5 to 30% by weight, more preferably 10 to 21% by weight and most preferably 12.5 to 18.5% by weight, calculated to the total weight of the emulsion. Here, it is further preferred, if no further antiperspirant active aluminum compound is contained.

For the cases that the emulsion comprises aluminum chlorohydrate and aluminum sesquichlorohydrate it is further preferred, if the ratio by weight between the aluminum chlorohydrate and aluminum sesquichlorohydrate is preferably in the range from 2:1 to 50:1, more preferably from 3.5:1 to 30:1, still more preferably 4:1 to 24:1 and most preferable 5:1 to 20:1.

According to the invention the emulsion also comprises Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate emulsifier, whereby it is favored if the total quantity of Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate is in the range from 0.1 to 6% by weight, more preferably 1.3 to 5% by weight, more preferably 1.9 to 4.3% by weight, more preferably 2.2 to 3.9% by weight and most preferably 2.5 to 3.1% by weight, calculated to the total weight of the emulsion.

According to the invention the emulsion comprises at least one lipid and/or wax component with a melting point of >50° C. Thereby, it is preferred if the total quantity of the lipid and/or wax components with a melting point of >50°C is in the range from 8 to 18% by weight, more preferably 10 to 15% by weight calculated to the total weight of the emulsion.

Generally, waxes are of solid to brittle consistency, coarse to finely crystalline, transparent to opaque, but not glass-like, and melt above 50° C without decomposition. Just a little above the melting point they are of low viscosity and exhibit a heavily temperature-dependent consistency and solubility.

According to the invention, preference is given, to natural vegetable waxes, e.g., candelilla wax, carnauba wax, japan wax, sugar cane wax, ouricoury wax, cork wax, sunflower wax, fruit waxes, such as orange waxes, lemon waxes, grapefruit wax, and animal waxes, e.g., beeswax, shellac wax and spermaceti. For the purposes of the invention, it may be particularly preferred to use hydrogenated or hardened waxes. Wax components which can be used are also chemically modified waxes, in particular, the hard waxes, such as, for example, montan ester waxes, hydrogenated jojoba waxes and sasol waxes. Synthetic waxes, which are likewise preferred according to the invention are polyalkylene waxes and polyethylene glycol waxes, C20-C40-dialkyl esters of dimer acids, C30-50-alkyl beeswax and alkyl and alkylaryl esters of dimer fatty acids. A particularly preferred wax component is chosen from at least one ester of a saturated monohydric C16-C60-alcohol and a saturated C8-C36-monocarboxylic acid, as long as those esters have a melting point above 50°C. It is particularly preferred to choose the wax components from the group of esters of saturated, branched or unbranched alkane carboxylic acids of chain length from 12 to 24 carbon atoms and the saturated, branched or unbranched alcohols of chain length from 16 to 50 carbon atoms which have a melting point of >50° C. It is most preferred if the emulsion comprises at least cetyl palmitate as wax and/or lipid component with a melting point of >50°C.

If an ester of saturated, branched or unbranched alkane carboxylic acids of chain length from 12 to 24 carbon atoms and the saturated, branched or unbranched alcohols of chain length from 16 to 50 carbon atoms, which has a melting point of >50°C, is contained in the emulsion of the invention, it is further preferred if the total quantity of this ester is in the range from 3 to 9% by weight, more preferably 4.5 to 7.5% by weight and most preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

If cetyl palmitate is contained in the emulsion of the invention, it is further preferred if the total quantity of cetyl palmitate is in the range from 3 to 9% by weight, more preferably 4.5 to 7.5% by weight and most preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

Further preferred lipid and/or wax components are the triglycerides of saturated and optionally hydroxylated C12-30-fatty acids, such as hydrogenated triglyceride fats, in particular hydrogenated palm oil, hydrogenated coconut oil, hydrogenated castor oil, glyceryl tribehenate (tribehenin) and/or glyceryl tri-12-hydroxystearate, also synthetic complete esters of fatty acids and glycols or polyols having 2-6 carbon atoms so long as they have a melting point above 50° C, for example, preferably C18-C36 acid triglyceride (Syncrowax® HGL-C).

Furthermore, it is preferred according to the invention if the emulsion also comprises hydrocarbon waxes, which have a melting point exceeding 50°C. Typical examples of these kind of waxes are often found under the CTFA designation “synthetic wax”. For the cases that synthetic wax and/or another hydrocarbon wax, which has a melting point exceeding 50°C is contained, it is further preferred if the total quantity of those waxes is in the range from 0.5 to 5 % by weight, more preferably from 2.1 to 3.8 % by weight, calculated to the total weight of the emulsion. According to the invention, hydrogenated castor oil, obtainable, e.g., as the commercial product Cutina® HR, is a further particularly preferred wax component which has a melting point exceeding 50°C. In the case hydrogenated castor oil is contained in the emulsion of the invention, it is further preferred if the total quantity of hydrogenated castor oil in the emulsion is in the range from 3 to 9% by weight, more preferably 4.5 to 7.5% by weight an most preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

According to the invention, fatty acids are not understood as wax and/or lipid component. Accordingly those fatty acids do not count to the total quantity of the at least one lipid and/or wax component with a melting point of >50°C.

According to the invention, fatty alcohols are not understood as wax and/or lipid component. Accordingly those fatty alcohols do not count to the total quantity of the at least one lipid and/or wax component with a melting point of >50°C.

According to the invention it is preferred, if the lipid and/or wax components with a melting point of >50°C is in the range from 5 to 15% by weight, more preferably 6 to 12% by weight and most preferably from 7.5 to 11 % by weight, calculated to the total weight of the emulsion.

Furthermore, the emulsion of the invention comprises at least one oil which is liquid at 20° C.

Oils preferred according to the invention are chosen from the triglycerides of linear or branched, saturated or unsaturated, optionally hydroxylated C8-30-fatty acids. The use of natural oils, e.g., soya oil, cotton seed oil, sunflower oil, palm oil, palm kernel oil, linseed oil, almond oil, castor oil, corn oil, olive oil, rapeseed oil, sesame oil, thistle oil, wheat germ oil, peach kernel oil and the liquid fractions of coconut oil and the like may be particularly suitable. Also suitable, however, are synthetic triglyceride oils, in particular capric/caprylic triglycerides.

Further oils d) preferred according to the invention are chosen from the dicarboxylic acid esters of linear or branched C2-C10-alkanols, in particular, diisopropyl adipate, di-n-butyl adipate, di(2-ethylhexyl) adipate, dioctyl adipate, diethyl/di-n-butyl/dioctyl sebacate, diisopropyl sebacate, dioctyl malate, dioctyl maleate, dicaprylyl maleate, diisooctyl succinate, di-2-ethylhexyl succinate and di(2-hexyldecyl) succinate.

Further oils d) preferred according to the invention are chosen from the addition products of from 1 to 5 propylene oxide units onto mono- or polyhydric C8-22-alkanols, such as octanol, decanol, decanediol, lauryl alcohol, myristyl alcohol and stearyl alcohol, e.g., PPG-2 myristyl ether and PPG-3 myristyl ether.

Further oils d) are preferably chosen from the esters of the linear or branched saturated or unsaturated fatty alcohols having 2-30 carbon atoms with linear or branched saturated or unsaturated fatty acids having 2-30 carbon atoms, which may be hydroxylated and which are liquid at 20°C. These include hexyldecyl stearate, hexyldecyl laurate, isodecyl neopentanoate, isononyl isononanoate, C12-15 alkyl benzoate, 2-ethylhexyl palmitate, 2- ethylhexyl stearate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl isostearate, isopropyl oleate, isooctyl stearate, isononyl stearate, isocetyl stearate, isononyl isononanoate, isotridecyl isononanoate, cetearyl isononanoate, 2-ethylhexyl laurate, 2- ethylhexyl isostearate, 2-ethylhexyl cocoate, 2-octyldodecyl palmitate, butyloctanoic acid-2- butyl octanoate, diisotridecyl acetate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, ethylene glycol dioleate and dipalmitate.

Further preferred oils d) which can be used are chosen from the addition products of at least 6 ethylene oxide and/or propylene oxide units onto mono- or polyhydric C3-22-alkanols. Especially preferred are PPG-14 butyl ether and PPG-15 stearyl ether.

A further preferred oil d) contained in the emulsion is known under the CTFA designation dicaprylyl ether.

Further oils d), which can be contained in the emulsion of the invention are selected from hydrocarbon oils, e.g. paraffinum liquidum. One particular preferred oil of this group is C15- 19 alkane.

A particular preferred embodiment of the invention is characterized in that the emulsion comprises at least one oil selected from the addition products of 10 to 20 propylene oxide units onto mono- or polyhydric C3-22-alkanols, which are liquid at 20° C. Within this embodiment it is preferred if the oil d) is selected from PPG-14 butyl ether and PPG-15 stearyl ether.

In another embodiment of the invention the emulsion comprises at least one oil selected from the addition products of 10 to 20 propylene oxide units onto mono- or polyhydric C3-22- alkanols, which are liquid at 20° C, and/or esters of the linear or branched saturated or unsaturated fatty alcohols having 2-30 carbon atoms with linear or branched saturated or unsaturated fatty acids having 2-30 carbon atoms, which are liquid at 20°C. It is particular preferred if the oil d) is selected from PPG-14 butyl ether, PPG-15 stearyl ether and/or esters of the linear or branched saturated or unsaturated fatty alcohols having 2-30 carbon atoms with linear or branched saturated or unsaturated fatty acids having 2-30 carbon atoms, which are liquid at 20°C. It is even more preferred if PPG-14 butyl ether, PPG-15 stearyl ether and/or C12-15 alkyl benzoate are contained.

For the cases in which PPG-14 butyl ether is contained in the emulsion, it is preferred if the total quantity of PPG-14 butyl ether is in the range from 8 to 18%, more preferably from 9 to 15% by weight and most preferably from 10 to 14% by weight, calculated to the total weight of the emulsion.

For the cases in which PPG-15 stearyl ether is contained in the emulsion, it is preferred if the total quantity of PPG-15 stearyl ether is in the range from 8 to 18%, more preferably from 9 to 15% by weight and most preferably from 10 to 14% by weight, calculated to the total weight of the emulsion.

For the cases in which C12-15 alkyl benzoate is contained in the emulsion, it is preferred if the total quantity of C12-15 alkyl benzoate is in the range from 3 to 12%, more preferably from 5 to 9% by weight and most preferably from 5.5 to 8% by weight, calculated to the total weight of the emulsion.

Furthermore, it is of particular advantage in all embodiments of the invention if dicaprylyl ether is contained as one oil being liquid at 20°C and whereby the total quantity of dicaprylyl ether is in the range from 0.1 to 5% by weight, more preferably from 0.8 to 4% and most preferred from 1.5 to 3.5% by weight, calculated to the total weight of the emulsion.

Furthermore, it is of particular advantage in all embodiments of the invention if C15-19 alkane is contained as further oil being liquid at 20°C and whereby the total quantity of C15- 19 alkane is in the range from 0.1 to 5% by weight, more preferably from 0.8 to 4% and most preferred from 1.5 to 3.5% by weight, calculated to the total weight of the emulsion.

It is further preferred according to the invention if oils that are liquid at 20°C are contained in a total quantity in the range from 20 to 30% by weight, more preferably 22.5 to 28% by weight and most preferably 23 to 27% by weight, calculated to the total weight of the emulsion. According to the invention the emulsion comprises at least one fatty acid having 12 to 20 carbon atoms. These fatty acids do, as stated above, not count to the lipids and/or wax components.

Preferred fatty acids are those known by the person skilled in art, in particular arachidic acid, myristic acid, oleic acid, palmitic acid and stearic acid. Most preferred are palmitic acid and stearic acid.

Generally, the fatty acids having 12 to 20 carbon atoms may be included in a total quantity ranging from 0.5 to 5% by weight. It was noted that by selecting specific quantities of those fatty acids the hardness of the emulsion under normal conditions can be adjusted.

The hardness of a solidified emulsion may be measured in the following way: A PENETROMETER PNR12 of Anton Paar brand is employed to measure the distance a needle (model 1438008, supplied with the PENETROMETER PNR12) penetrates into the solidified emulsion. Thereby, the needle is positioned vertically above the solidified emulsion with the tip pointing towards the emulsion. Then the needle is moved towards the emulsion such that it stops just before touching the emulsion. Then the needle is released such it penetrates perpendicularly into the emulsion. Depending on the hardness of the emulsion, the needle penetrates into different depth of the emulsion. The penetration depth is measured by the PENETROMETER PNR12. The measurements are carried out at 20° C. and 50% relative atmospheric humidity, the sample temperature was 20° C. The measurements were performed 24 hours after preparation of the solidified emulsion.

Measurements indicated that it is of particular advantage, if the total quantity of those fatty acid having 12 to 20 carbon atoms is in the range from 1 to 2% by weight, calculated to the total weight of the emulsion. The emulsions formed with those quantities were found to have the right sensory for the stick to be easy to spread but not soft enough to leave a high amount of product and residue on the skin. Higher quantities lead to very hard sticks, which are no easier to apply. Lower quantities result in an emulsion which is too soft such that the too much of the emulsion is applied if used as a convention antiperspirant stick. These results were confirmed by a panel study evaluating the sensorial properties of emulsions.

It is particular preferred if palmitic acid and/or stearic acid are contained, whereby the total quantity of those fatty acids is in the range from 1 to 2% by weight calculated to the total weight of the emulsion. Furthermore, the emulsion is preferably characterized in that at least one fatty alcohol is contained. Preferred fatty alcohols are selected from linear alkanols having 14 to 20 carbon atoms. Particular preferred is behenyl alcohol.

If at least one fatty alcohols are selected from linear alkanols having 14 to 20 carbon atoms is contained in the emulsion, the total quantity of these fatty alcohols is preferably in the range from 4 to 12% by weight, more preferably 6 to 10% and most preferably from 6.5 to 9.5% by weight, calculated to the total weight of the emulsion.

If behenyl alcohol is contained in the emulsion, the total quantity of behenyl alcohol is preferably in the range from 4 to 12% by weight, more preferably 6 to 10% and most preferably from 6.5 to 9.5% by weight, calculated to the total weight of the emulsion.

Silicates serve as odor absorbers which also simultaneously and advantageously aid the rheological properties of the emulsion according to the invention. Silicates which are particularly advantageous according to the invention include phyllosilicates and, among these, in particular montmorillonite, kaolinite, illite, beidellite, nontronite, saponite, hectorite, bentonite, smectite and talc. It is most preferred if the emulsion comprises talc.

In the case montmorillonite, kaolinite, illite, beidellite, nontronite, saponite, hectorite, bentonite, smectite and/or talc are contained in the emulsion, it is preferred if the total quantity of those is in the range from 0.1 to 8% by weight, more preferably from 1 to 6% by weight and most preferably from 2 to 5 % by weight, calculated to the total weight of the emulsion.

Furthermore, it is preferred according to the invention if the emulsion does not comprise any further emulsifier. Emulsifiers generally known to the person skilled in the art, as listed, for example, in Kirk-Othmer, "Encyclopedia of Chemical Technology", 3rd edition, 1979, volume 8, page 913-916. Accordingly, further emulsifiers are not needed to avoid crystal formation allowing a cheaper formulation to be prepared.

The water content of the emulsion is preferably in the range from 22 to 40% by weight, more preferably 25 to 38% by weight and most preferably 26 to 34% by weight calculated to the total weight of the emulsion. One further beneficial aspect of the present invention is that it is possible to address the problems described without the use of silicone oils. Accordingly, preferred emulsions of the invention do not contain silicone oils and/or silicone emulsifier.

One further beneficial aspect of the present invention is that it is possible to address the problems described without the use of homo- or copolymers of acrylic acid and/or methacrylic acid. Accordingly, preferred emulsions of the invention do not contain homo- or copolymers of acrylic acid and/or methacrylic acid.

Furthermore, the emulsion of the invention is preferably characterized in that that the emulsion is liquid at 70° C and is solid under normal conditions.

The emulsions of the invention can further comprise cosmetic auxiliaries such as those conventionally used in such preparations, for example preservatives, bactericides, perfumes, substances for preventing foaming, dyestuffs, pigments which have a coloring effect, thickeners, moisturizers and / or humectant substances, fats, oils, waxes or other customary constituents of a cosmetic or dermatological formulation such as alcohols, polyols, polymers, foam stabilizers, organic solvents or silicone derivatives, and moisturizers.

Examples:

The following examples should illustrate the compositions of this invention, without intending to limit the invention to these examples. The numerical values in the examples are percentages by weight, based on the total weight of the preparations.

lnv.1 is a water in oil emulsion according to the invention. Com.1 and Com. 2 comparative examples, which are oil in water emulsions. Furthermore, Com.3 is a comparative example, which is an anhydrous suspension stick.

The different bases were prepared and let to solidify by filling the bulk at a temperature between 68°C to 70°C into as suitable packaging and by cooling the bulk in the packaging at 6°C for 2 hours. Afterwards the formed sticks were stored inside a hermetic container at 25°C for 3-4 weeks. Then the stick bases were re-heated (85°C) and melted. Afterwards, they were solidified again following the standard solidification process (Cooling under 6°C for 2 hours as described above). The results were the following:

Inv.1 :

The emulsion is solid after re-heating and cooling. There is no need to re-homogenize the stick as the emulsion shows no separation and lumps. A lab analysis has shown that the distribution of the antiperspirant active ingredient remains homogenous along the stick.

Com.1: The emulsion was not solidify after re-heating and cooling. Furthermore, an oil and water separation was observed.

Com.2:

The emulsion was not solidify after re-heating and cooling. Furthermore, an oil and water separation was observed. Lumps were formed.

Com.3:

Solidify after re-heating and cooling. Nevertheless, antiperspirant active and talc precipitates and a re-homogenization is needed.

Accordingly, it was found that only the example according to the invention was still homogeneous and no phase separation was observed. Thus, this stick formulation is suitable to be exposed to elevated temperatures upon storage or transport. Furthermore, it was noted that no crystal formation was observed on the surface of lnv.1.

Further example formulations:

Claims

1. Antiperspirant water in oil emulsion comprising, calculated to the total weight of the emulsion, a) at least one antiperspirant active aluminum compound; b) Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate; c) at least one lipid and/or wax component with a melting point of >50° C; d) at least one oil which is liquid at 20° C; e) at least one fatty acid having 12 to 20 carbon atoms and f) 25% to 40% by weight water.

2. Emulsion according to claim 1 characterized in that aluminum chlorohydrate and/or aluminum sesquichlorohydrate are contained as antiperspirant active aluminum compound.

3. Emulsion according to claim 1 or 2 characterized in that the total quantity of the antiperspirant active aluminum compound is in the range from 5 to 30% by weight, more preferably 10 to 21% by weight and most preferably 12.5 to 18.5% by weight, calculated to the total weight of the emulsion.

4. Emulsion according to any of the claims 1 to 3 characterized in that that the emulsion comprises aluminum chlorohydrate and aluminum sesquichlorohydrate and the ratio by weight between the aluminum chlorohydrate and aluminum sesquichlorohydrate is in the range from 2:1 to 50:1, preferably from 3.5:1 to 30:1, more preferably 4:1 to 24:1 and most preferable 5:1 to 20:1.

5. Emulsion according to any of the claims 1 to 4 characterized in that the total quantity of Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate is in the range from 0.1 to 6% by weight, preferably 1.3 to 5% by weight, more preferably 1.9 to 4.3% by weight, more preferably 2.2 to 3.9% by weight and most preferably 2.5 to 3.1% by weight, calculated to the total weight of the emulsion.

6. Emulsion according to any of the claims 1 to 5 characterized in that the total quantity of the lipid and/or wax components with a melting point of >50°C is in the range from 8 to 18% by weight, more preferably 10 to 15% by weight calculated to the total weight of the emulsion.

7. Emulsion according to any of the claims 1 to 6 characterized in that the wax component is chosen from at least one ester of a saturated monohydric C16-C60- alcohol and a saturated C8-C36-monocarboxylic acid, as long as those esters have a melting point above 50°C.

8. Emulsion according to claim 7 characterized in that the emulsion comprises at least cetyl palmitate as wax and/or lipid component with a melting point of >50°C.

9. Emulsion according to any of the claims 1 to 8 characterized in that the emulsion comprises an ester of saturated, branched or unbranched alkane carboxylic acids of chain length from 12 to 24 carbon atoms and the saturated, branched or unbranched alcohols of chain length from 16 to 50 carbon atoms, which has a melting point of >50°C, in a total quantity in the range from 3 to 9% by weight, preferably 4.5 to 7.5% by weight and more preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

10. Emulsion according claim 8 or 9 characterized in that cetyl palmitate is contained in the emulsion and the total quantity of cetyl palmitate is in the range from 3 to 9% by weight, preferably 4.5 to 7.5% by weight and most preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

11. Emulsion according to any of the claim 1 to 10 characterized in that the emulsion comprises synthetic wax and/or another hydrocarbon wax, which has a melting point exceeding 50°C, whereby it is further preferred if the total quantity of those waxes is in the range from 0.5 to 5 % by weight, more preferably from 2.1 to 3.8 % by weight, calculated to the total weight of the emulsion.

12. Emulsion according to any of the claim 1 to 11 characterized in that the emulsion comprises hydrogenated castor oil as wax component, whereby it is preferred if the total quantity of hydrogenated castor oil in the emulsion is in the range from 3 to 9% by weight, more preferably 4.5 to 7.5% by weight an most preferably, 5 to 7% by weight, calculated to the total weight of the emulsion.

13. Emulsion according to any of the claims 1 to 12 characterized in that the total quantity of the lipid and/or wax components with a melting point of >50°C is in the range from 5 to 15% by weight, more preferably 6 to 12% by weight and most preferably from 7.5 to 11% by weight, calculated to the total weight of the emulsion.

14. Emulsion according to any of the claims 1 to 13 characterized in that at least one oil selected from PPG-14 butyl ether, PPG-15 stearyl ether and/or esters of the linear or branched saturated or unsaturated fatty alcohols having 2-30 carbon atoms with linear or branched saturated or unsaturated fatty acids having 2-30 carbon atoms, which are liquid at 20°C, is contained.

15. Emulsion according to claim 14 characterized in that PPG-14 butyl ether is contained in the emulsion, whereby it is preferred if the total quantity of PPG-14 butyl ether is in the range from 8 to 18%, more preferably from 9 to 15% by weight and most preferably from 10 to 14% by weight, calculated to the total weight of the emulsion.

16. Emulsion according to any of the claims 1 to 15 characterized in that dicaprylyl ether is contained as oil being liquid at 20°C and whereby the total quantity of dicaprylyl ether is in the range from 0.1 to 5% by weight, more preferably from 0.8 to 4% and most preferred from 1.5 to 3.5% by weight, calculated to the total weight of the emulsion.

17. Emulsion according to any of the claims 1 to 16 characterized in that C12-15 alkyl benzoate is contained in the emulsion, whereby it is preferred if the total quantity of C12-15 alkyl benzoate is in the range from 3 to 12%, more preferably from 5 to 9% by weight and most preferably from 5.5 to 8% by weight, calculated to the total weight of the emulsion.

18. Emulsion according to any of the claims 1 to 17 characterized in that the oils that are liquid at 20°C are contained in a total quantity in the range from 20 to 30% by weight, more preferably 22.5 to 28% by weight and most preferably 23 to 27% by weight, calculated to the total weight of the emulsion.

19. Emulsion according to any of the claims 1 to 18 characterized in that the emulsion comprises palmitic acid and/or stearic acid, whereby the total quantity of those fatty acids is in the range from 1 to 2% by weight calculated to the total weight of the emulsion.

20. Emulsion according to any of the claims 1 to 19 characterized in that at least one fatty alcohols selected from linear alkanols having 14 to 20 carbon atoms is contained in the emulsion, whereby the total quantity of these fatty alcohols is preferably in the range from 4 to 12% by weight, more preferably 6 to 10% and most preferably from 6.5 to 9.5% by weight, calculated to the total weight of the emulsion.

21. Emulsion according to any of the claims 1 to 20 characterized in that water content of the emulsion is in the range from 25 to 38% by weight and preferably 26 to 34% by weight calculated to the total weight of the emulsion.

22. Emulsion according to any of the claims 1 to 21 characterized in that that the emulsion is liquid at 70° C and is solid under normal conditions.