WO2018141032A1

WO2018141032A1 - Anhydrous antiperspirant composition

Info

Publication number: WO2018141032A1
Application number: PCT/BR2017/050016
Authority: WO
Inventors: Pedro Tupinamba Werneck BARROSO; Clara Anhel FERRAZ
Original assignee: LOreal SA
Current assignee: LOreal SA
Priority date: 2017-01-31
Filing date: 2017-01-31
Publication date: 2018-08-09
Anticipated expiration: 2019-07-31
Also published as: BR112019012194A2

Abstract

The present invention relates to an anhydrous antiperspirant composition comprising: (a) at least one suspending agent; (b) at least one polyamide oil thickener; (c) at least one antiperspirant active in a cosmetically acceptable vehicle. The composition controls body odor and perspiration without leaving visible white residue on the skin and/or staining an end-user's clothing. The present invention also relates to the method of avoiding white stains using the anhydrous antiperspirant composition as defined above and to the use of the combination of (a) at least one suspending agent and (b) at least one polyamide oil thickener, for the manufacture of an anhydrous antiperspirant composition of the present invention.

Description

ANHYDROUS ANTIPERSPIRANT COMPOSITION

FIELD OF THE INVENTION

The present invention relates to an antiperspirant composition and a method for controlling perspiration of the body and avoiding undesired stains on fabrics and skin, said composition comprises at least one suspending agent, at least one polyamide oil thickener, at least one antiperspirant active, in a cosmetically acceptable carrier.

BACKGROUND OF THE INVENTION

Antiperspirant compositions are widely used in the world for controlling localized perspiration and thereby avoiding wet patches on human skin or clothing, which is considered unpleasant by the society. Also, such compositions avoid undesirable odors produced by the interaction of bacteria and sweat gland secretions, for said sweat glands are obstructed by the antiperspirants' active agents, limiting body transpiration.

A variety of different product forms are available in the market, such as powders, liquids, gels or soft solids and sticks. The stick form can be distinguished from a gel or a paste in that in a stick, the formulated product can maintain its shape for extended time periods outside the package, wherein the product does not significantly lose its shape, except for the shrinkage due to solvent evaporation.

Sticks are perceived to be dry, moisturizing and easy to apply. One of the most popular form of applying antiperspirant compositions is in stick format. However, some drawbacks are usually pointed out by the customers, such as the presence of white stains on clothes and on skin.

Gallenic formulations of sticks typically contain a solvent vehicle such as cyclomethicone together with a waxy substance such as stearyl alcohol, alone or in combination with castor wax, in order to gel or thicken the suspension in a satisfactory form to create a suitable stick.

Even though there are few sticks in the market claiming to be "invisible", said available gallenic compositions present an important disadvantage related to white staining the fabrics and skin, which are due to the waxes, that are essential to the stick to keep its format and hardness and are present in said compositions bases.

Some attempts of avoiding white stains on the skin and clothes, for example the described in US6083492, disclosing a solid stick, underarm product composition composed of a liquid vehicle, an antiperspirant salt, a dibenzylidene alditol as gelling agent, and a co-gelling agent of a hydrophobically modified water soluble polysaccharide polymer which comprises a water soluble polysaccharide polymer backbone, presents some drawbacks. The gellants used in said document, like many other gellants known in the art, are not acid stable and therefore tend to interact with the antiperspirant active due to the acidic nature of the active. This interaction can result in reduced efficacy of the active, poor gel formation, and lower gel stability over extended periods during shipping or storage. This interaction may also cause processing difficulties at the temperatures and holding times often used during the formulation and manufacturing process. These gellants are also commonly used in combination with glycol carriers or other solvents which tend to be wet and sticky and irritating to the skin.

Another attempt of avoiding white stains on the skin and clothes, as described for example in US7744857, involved the combination of particulate antiperspirant active, gellants and liquid carrier in a stick, wherein the liquid carrier essentially comprises an aryl substituted siloxane and wherein all components in the combination present matching refractive indexes. Refractive index matching allows more passage of light through the gel stick with less scattering of the light, thus resulting in products which appear more clear or translucent as a packaged composition or when topically applied to the skin. However, these gel sticks are expensive to produce due to the cost of using raw materials having only selected matching refractive indices. These compositions are also very difficult to formulate, given that the refractive index matching for a three component system (particulate active, solvent and gellant) is extremely difficult, and greatly limits the raw materials that can be used to prepare such a formulation.

As a result, although the above-referenced compositions assert that they exhibit low visible deposits, in practice, there remains considerable room for improvement.

It is therefore an object of the present invention to provide an antiperspirant anhydrous composition in stick format, which replaces the wax on the formula by an oil thickener and replaces the structurants by suspending agents, significantly reducing the white stains of the stick and having a true invisible stick and improved efficacy performance.

SUMMARY OF THE INVENTION

The present invention is directed to an anhydrous antiperspirant composition in stick format comprising at least one suspending agent, at least one polyamide oil thickener, at least one antiperspirant active, in a cosmetically acceptable carrier.

The inventive anhydrous antiperspirant composition of the present invention significantly reduces the white stains relative to the prior art sticks and presents improved efficacy performance.

In a second aspect, it is provided a method for avoiding undesired stains on fabrics and skin, wherein an effective amount of the anhydrous antiperspirant composition of the present invention is applied on the keratinous material.

In a third aspect, it is provided the use of the combination of (a) at least one suspending agent and (b) at least one polyamide oil thickener, for the manufacture of an anhydrous antiperspirant composition.

DETAILED DESCRIPTION OF THE INVENTION

The foregoing description illustrates and describes the disclosure.

Additionally, the disclosure shows and describes only the preferred embodiments, and it is to be understood that it is capable to use in various other combinations, modifications, and environments and is capable of changes or modifications within the scope of the invention concepts as expressed herein, commensurate with the above teachings and/or the skill or knowledge of the relevant art. The embodiments described herein below are further intended to explain best modes known by applicant and to enable others skilled in the art to utilize the disclosure in such, or other, embodiments and with the various modifications required by the particular applications or uses thereof. Accordingly, the description is not intended to limit the invention to the form disclosed herein. Also, it is intended to the appended claims be construed to include alternative embodiments.

The antiperspirant compositions of the present invention can comprise, consist of, or consist essentially of the essential elements and limitations of the present invention described herein, as well as any of the additional or optional ingredients, components, or limitations described herein.

The terms "a," "an," and "the" are understood to encompass the plural as well as the singular.

As used herein, the expression "at least one" means one or more and thus includes individual components as well as mixtures/combinations. All percentages, parts and ratios are by weight of the total composition, unless otherwise specified. All such weights as they pertain to listed ingredients are based on the specific ingredient level and, therefore, do not include solvents, carriers, by-products, filler or other minor ingredients that may be included in commercially available materials, unless otherwise specified.

All ranges and values disclosed herein are inclusive and combinable. For examples, any value or point described herein that falls within a range described herein can serve as a minimum or maximum value to derive a sub-range, etc.

All publications and patent applications cited in this specification are herein incorporated by reference, and for any and all purposes, as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. In the event of an inconsistency between the present disclosure and any publications or patent application incorporated herein by reference, the present disclosure should be considered.

"Cosmetically acceptable" means that the item in question is compatible with any keratinous substrate. For example, "cosmetically acceptable carrier" means a carrier that is compatible with any keratinous substrate.

The term "anhydrous" as used herein means that the antiperspirant composition of the present invention and the essential or optional components thereof, are substantially free of added or free water. From a formulation standpoint, this means that the antiperspirant compositions of the present invention contain less than about 2%, preferably less than about 1 %, more preferably less than about 0.5%, most preferably zero percent, by weight of free or added water.

It is now surprisingly revealed that the association of at least one suspending agent, at least one polyamide oil thickener, at least one antiperspirant active, and a cosmetically acceptable carrier, yields a composition which does not whiten the skin and fabrics after application.

Specially, the combination of at least one suspending agent and at least one polyamide oil thickener replacing the wax and structurants of gallenic formulations, as disclosed by the present invention, provided an anhydrous antiperspirant composition that overcome the drawbacks previously pointed out.

Suspending Agent

The suspending agents are responsible to leave the antiperspirant actives, which are in a powder format, homogenous in the whole stick during filling and cooling. The suspending agents used herein replace the structurants of the antiperspirants gallenic compositions.

The suspending agents are preferably clays, more preferably organoclays, which could be selected from hydrophobically treated clays and pre- activated clays. Suitable suspending agents for the invention are, for example, montmorillionite, bentonite or hectorite; particularly chosen from disteardimonium hectorite, stearalkonium hectorite, quaternium-18 hectorite, quaternium-18 bentonite.

A preferred suspending agent according to the present invention includes disteardimonium hectorite, conventionally used as a suspending agent for cosmetics or the like. For example, disteardimonium hectorite commercially available under the trade name of "Bentone^® 38V", "Bentone^® 38 VCG", these two being organic modified clay minerals; or Bentone Gel^®, this latter being pre-activated clay minerals, all by the company Elementis Specialties Inc. can be preferably used.

The suspending agents in the anhydrous antiperspirant composition of the present invention are preferably present in amounts ranging from about 1 % to 7% by weight, preferably about 2 to 6% by weight, more preferably about 2.5% to 5% by weight, relative to the total weight of the composition.

Oil Thickener

The terms "structurant", "gellant" or "oil thickener" as used herein refer to an essential ingredient used to thicken a suspension or to form solid gels, being responsible to leave the stick hard and in its format.

The waxes are thickeners usually employed in gallenic compositions reducing the extent to which light that can be transmitted through them and causing encapsulation of the water-soluble active ingredients. The oil thickeners used herein substitute the waxes in order to avoid white stains of the stick and have a true invisible stick.

A composition according to the invention comprises at least one polyamide oil thickener. Such polyamides may be ester-terminated or amide- terminated. Non-limitative examples of ester and amide terminated polyamides that may be used as oil thickeners include those sold by the company Croda under the Sylvaclear™ or OleoCraft™ tradenames and known by the INCI names ethylenediamine/hydrogenated dimer dilinoleate copolymer bis-di-C14-18 alkyl amide (Sylvaclear™ A200V or A2614V); bis-stearyl ethylenediamine/neopentyl glycol/stearyl hydrogenated dimer dilinoleate copolymer (Sylvaclear™ C75V); polyamide-3 (Sylvaclear™ AF1900V); polyamide-4 (Sylvaclear™ WF1500V); or ethylenediamine/stearyl dimer dilinoleate copolymer (OleoCraft™ LP-I O-PA-(MV)).

According to one preferred embodiment, the oil thickener comprises an ester-terminated polyamide, preferably the compound whose INCI name is ethylenediamine/stearyl dimer dilinoleate copolymer such as the product sold by the company Croda under the name OleoCraft™ LP-10-PA-(MV).

According to another preferred embodiment, the oil thickener comprises an ester-terminated polyamide, preferably the compound whose INCI name is polyamide-3 such as the product sold by the company Croda under the name Sylvaclear™ AF1900V.

Preferably, the amount of the oil thickener in the anhydrous antiperspirant composition should be sufficient to cause the liquid vehicle to gel {i.e., become free-standing). The polyamide oil thickener is preferably present in amounts ranging from about 0.1 to about 30% by weight of the composition, preferably in the range of about 5 to about 25%, more preferably in the range of about 10 to about 20%, by weight, relative to the total weight of the composition.

Antiperspirant Active

The antiperspirant anhydrous stick compositions of the present invention comprise particulate antiperspirant active suitable for application to human skin. These particulate actives must remain substantially unsolubilized in the anhydrous systems as described herein.

The antiperspirant active for use in the antiperspirant gel-solid stick compositions of the present invention include any compound, composition or other material having antiperspirant activity. Preferred classes of suitable actives include aluminum salts, zirconium salts, aluminum and/or zirconium complexes, for example aluminum halides, aluminum hydroxy halides, zirconyl oxyhalides, zirconyl hydroxyhalides, and mixtures thereof. However, it is desirable to employ basic aluminum and/or zirconium salts, as such or complexed, and especially salts in which the halide is chloride. Specific examples of preferred salts include activated aluminum chlorohydrate, aluminum chlorohydrate, aluminum pentachlorohydrate and aluminum zirconium tetrachlorohydrex gly. Useful zirconium salts include zirconium hydroxy-chloride and zirconium oxychloride. Various generally used actives will be known to those skilled in the art.

The concentration of particulate active in the composition should be sufficient to provide the desired perspiration wetness and odor control from the antiperspirant anhydrous stick formulation selected. The antiperspirant active is preferably present in amounts ranging from about 0.1 to about 30% by weight, preferably in the range of about 10% to about 20% by weight, relative to the total weight of the composition.

Cosmetically Acceptable Carrier

The cosmetically acceptable carrier may function as an emollient oil and/or lubricant. It may also serve to facilitate uniform distribution of the antiperspirant material on the skin.

These may comprise silicone oils, natural or synthetic esters, hydrocarbons, fatty acids, fatty alcohols and mixtures thereof.

Silicone oils may be divided into the volatile and nonvolatile variety. The term "volatile" as used herein refers to those materials which have a measurable vapor pressure at ambient temperature. Volatile silicone oils are preferably chosen from cyclic (cyclomethicone) or linear polydimethylsiloxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms.

Nonvolatile silicone oils useful as an emollient material include polyalkyl siloxanes, polyalkylaryl siloxanes and polyether siloxane copolymers. The essentially nonvolatile polyalkyl siloxanes useful herein include, for example, polydimethyl siloxanes.

Natural ester emollients principally are based upon mono-, di- and triglycerides. Representative glycerides include any vegetable oil, not being limitative to sunflower seed oil, cottonseed oil, primrose oil, castor and hydrogenated castor oils, rice bran oil, soybean oil, olive oil, safflower oil, shea butter, jojoba oil and combinations thereof.

Hydrocarbons which are suitable cosmetically acceptable carriers include apolar oils, such as petrolatum, mineral oil, C11 -C13 isoparaffins, polybutenes, and especially isohexadecane, available commercially as Permethyl 101 A from Presperse Inc.

Fatty acids having from 10 to 30 carbon atoms may also be suitable as cosmetically acceptable carriers. Illustrative of this category are pelargonic, lauric, myristic, palmitic, stearic, isostearic, oleic, linoleic, linolenic, hydroxystearic and behenic acids.

Fatty alcohols having from 10 to 30 carbon atoms are another useful category of cosmetically acceptable carrier. Illustrative of this category are stearyl alcohol, lauryl alcohol, myristyl alcohol, oleyl alcohol and cetyl alcohol.

Also, aliphatic fatty alcohols such as octyldodecanols are common cosmetic emollients that are particularly useful as coupling agents in anhydrous antiperspirant compositions because these solvents are readily soluble in non-polar volatile silicones and help to solubilize the gellant if included in the composition.

Preferred emollient oils are alkyl esters, such as PurSyn Ester 2E7 (neopentylglycol dihexanoate) manufactured by Exxon-Mobil; benzoate esters such as Finsolv TN (Trade Mark) manufactured by Finetex Inc.; hydrogenated polyalkenes, such as Panalane manufactured by Amoco and PureSyn PAO 2 (hydrogenated polydecene) manufactured by Exxon-Mobil; PPG ethers, such as Fluid AP (PPG-14 butylether) manufactured by Union Carbide; isopropyl palmitate; phenylsilicone; and isopropyl myristate.

Said compounds can be used alone or in a mixture thereof and may be used in amounts ranging from about 30% to 80%, in particular in the range of about 40% to 70%, and especially in the range of about 50% to 60%, all percentages being by weight of the total composition.

Optional Components

In addition to the essential components described hereinbefore, the antiperspirant compositions of the present invention may further comprise one or more optional components which may modify the physical or chemical characteristics of the compositions or serve as additional "active" components when deposited on the skin, provided that the optional components are physically and chemically compatible with the essential components described herein, or do not otherwise unduly impair product stability, aesthetics, or performance.

Non-limiting examples of such optional materials include components such as pH buffering agents; additional malodor controlling agents such as antiperspirant actives; fragrance materials; emollients; humectants; soothing agents; dyes and pigments; and related materials; preservatives; and soothing agents.

The present invention also provides a method for avoiding undesired stains on fabrics and skin, wherein an effective amount of the anhydrous antiperspirant composition of the present invention is applied on the keratinous material.

In addition, it is provided the use of the combination of (a) at least one suspending agent and (b) at least one polyamide oil thickener, for the manufacture of an anhydrous antiperspirant composition.

Implementation of the present disclosure is provided by way of the following examples. The examples serve to illustrate the technology without being limiting in nature.

EXAMPLES

Some specific non-limiting examples of preferred optional components are described in detail below. The formulations of the Examples provide antiperspirant products that are characterized by essentially complete absence of discernible whitening (to an experienced visual evaluator) and provide antiperspirant efficacy (as measured by Clinical gravimetric in vivo test). The ingredients may be processed as described or conventionally known.

Examples 1 and 2

The Examples 1 and 2 (Table 1 ) are antiperspirant anhydrous compositions of the invention, which are made by combining and mechanically mixing the vehicle and the ethylene diamine/stearyl dimer dilinoleate copolymer and heating it until 85 °C. Once the temperature is at 85 °C, the mixture is stirred for 15 minutes. The suspending agent and its activator (propylene carbonate) are added and stirred for 10 minutes. In the end, the active ingredient in powder form and the fragrance are added. The mixture is poured into suitable containers.

Table 1 - Inventive Examples

Ingredient Example 1 Example 2

DISTEARDIMONIUM HECTORITE 2 5

FRAGRANCE 1 .4 1 .4

PROPYLENE CARBONATE 0.67 1 .67

ISOPROPYL PALMITATE 55.93 51 .93

PENTAERYTHRITYL TETRA-DI-T-BUTYL

0.045 0.045 HYDROXYHYDROCINNAMATE

ALUMINUM ZIRCONIUM

25 25

TETRACHLOROHYDREX GLY

ETHYLENEDIAMINE/STEARYL DIMER

14.955 14.955 DILINOLEATE COPOLYMER Examples 3 to 5

The ingredients of Examples 3 to 5 (Table 2), which represent the present invention, are processed using a procedure similar to Examples 1 and 2.

Table 2 - Inventive Examples

Examples 6 to 9

It was also tested the efficacy of the compositions regarding the presence or absence of white stains on fabrics using the "White Stains in vitro Evaluation", wherein 0.1 g/100cm² was applied on an artificial leather and let it dry for 3 minutes at 37 °C in a heating plate. Subsequently, a black cotton fabric is rubbed against the artificial leather.

On Table 3, it is presented the tested compositions.

Table 3 - Comparative Examples

Invention Comparative Examples

Example

Example Example Example

INGREDIENTS (INCI US) 9

6 7 8

(Clarify)

ALUMINUM ZIRCONIUM

25 20 TETRACHLOROHYDREX GLY

ALUMINUM ZIRCONIUM

50 39

PENTACHLOROHYDRATE

DISTEARDIMONIUM

2

HECTORITE

PERLITE 0.2 0.2 0.2

SYNTHETIC WAX 9 9 12 Invention Comparative Examples

Example

Example Example Example

INGREDIENTS (INCI US) 9

6 7 8

(Clarify)

PHENOXYETHANOL 0.5 0.5

ISOPROPYL PALMITATE 9 9 26.7

ISONONYL ISONONANOATE 55.93

MORINGA OLEIFERA SEED

0.01

OIL

FRAGRANCE 1 .4 1 .8 1 .3

ETHYLENEDIAMINE/STEARYL

DIMER DILINOLEATE 15

COPOLYMER

DIMETHICONE 6.94 6.94 22.85

CETYL PEG/PPG-10/1

1 1

DIMETHICONE

DIMETHICONE (and)

PEG/PPG-18/18 0.3 0.3

DIMETHICONE

WATER 18.45 31 .26

PROPYLENE CARBONATE 0.67

PENTYLENE GLYCOL 0.5 0.5

POLYGLYCERYL-3

0.3 0.3

DIISOSTEARATE

BEHENETH-10 2 2

PPG-14 BUTYL ETHER 6.2

PEG-8 DISTEARATE 6.5

OZOKERITE 2.75

CALCIUM HIDROXIDE 0.5

MICA (and) TITANIUM

0.5 DIOXIDE

CITRUS LEMON FRUIT

0.5 EXTRACT

Example 6 is a composition of the invention, Examples 7 and 8 are common prior art compositions and Example 9 represents the formulation of the Gamier antiperspirant known as Clarify.

The compositions above were also compared with two additional compositions available in the market (Examples 10 and 1 1 ).

The first one is sold with the name of Dove Invisible Dry by Unilever (Example 10), and it presents the following formula: Cyclomethicone, Aluminum Zirconium Tetrachlorohydrex GLY, Stearyl Alcohol, C12-15 AlkyI Benzoate, PPG-14 Butyl Ether, Hydrogenated Castor Oil, Dimethicone, Polyethylene, parfum, Helianthus annuus Seed Oil, Steareth-100, BHT, Tocopheryl Acetate, Alpha- isomethyl lonone, Benzyl Salicylate, Butylphenyl Methylpropional, Cinnamyl Alcohol, Citronellol, Coumarin, Hexyl Cinnamal, Hydroxyisohexyl 3-cyclohexene Carboxaldehyde.

It was also compared with Rexona Powder also by Unilever (Example 1 1 ), which comprises Cyclomethicone, aluminum zirconium tetrachlorohydrex gly, stearyl alcohol, C12-15 alkyl benzoate, PPG-14 butyl ether, hydrogenated castor oil, dimethicone, polyethylene, parfum, Helianthus annuus seed oil, steareth-100, BHT, tocopheryl acetate, alpha-isomethyl ionone, benzyl salicylate, butylphenyl methylpropional, cinnamyl alcohol, citronellol, coumarin, hexyl cinnamal, hydroxyisohexyl 3-cyclohexene carboxaldehyde.

The results are presented in Figure 1 , wherein it is observed that the composition of the present invention (Example 6) presents a superior result regarding the reduction of white stains on fabrics.

The sequence of efficacy in white staining observed in Figure 1 , from the effective one to the less effective is: Example 6 (invention) < Example 9 (Clarify by Gamier) < Example 10 (Dove Invisible Dry) < Example 1 1 (Rexona Powder) < Example 7 < Example 8.

While particular embodiments of the invention have been shown and described, various modifications will be apparent to those skilled in the art, and therefore it is not intended that the invention be limited to the disclosed embodiments or to details thereof, and departures may be made therefrom within the spirit and scope of the invention.

Claims

SET OF CLAIMS

1 . An anhydrous antiperspirant composition, in stick format comprising:

(a) at least one suspending agent,

(b) at least one polyamide oil thickener,

(c) at least one antiperspirant active, and

in a cosmetically acceptable carrier.

2. An anhydrous antiperspirant composition, according to claim 1 , in which the suspending agent is a clay, preferably an organoclay, which could be selected from hydrophobically treated clays and pre-activated clays.

3. An anhydrous antiperspirant composition, according to any one of claims 1 to 2, in which the suspending agent is present in an amount of 1 % to 7% by weight, preferably 2 to 6% by weight, more preferably 2.5% to 5% by weight, relative to the total weight of the composition.

4. An anhydrous antiperspirant composition, according to any one of claims 1 to 3, in which the polyamide oil thickener is ester-terminated or amide- terminated.

5. An anhydrous antiperspirant composition, according to any one of claims 1 to 4, in which the polyamide oil thickener is selected from ethylenediamine/hydrogenated dimer dilinoleate copolymer bis-di-C -is alkyl amide, bis-stearyl ethylenediamine/neopentyl glycol/stearyl hydrogenated dimer dilinoleate copolymer, polyamide-3, polyamide-4 and ethylenediamine/stearyl dimer dilinoleate copolymer.

6. An anhydrous antiperspirant composition, according to any one of claims 1 to 5, in which the polyamide oil thickener is present in an amount of 0.1 to about 30% by weight, preferably in the range of about 5 to about 25% by weight, more preferably in the range of about 10 to about 20%, by weight, relative to the total weight of the composition.

7. An anhydrous antiperspirant composition, according to any one of claims 1 to 6, in which the antiperspirant active is selected from aluminum salts, zirconium salts, aluminum and/or zirconium complexes.

8. An anhydrous antiperspirant composition, according to any one of claims 1 to 7, in which the antiperspirant active is present in an amount of about 0.1 to about 30% by weight, preferably in the range of about 10 to about 20% by weight, relative to the total weight of the composition.

9. An anhydrous antiperspirant composition, according to any one of claims 1 to 8, cosmetically acceptable carrier is chosen from silicone oils, natural or synthetic esters, hydrocarbons, fatty acids, fatty alcohols and mixtures thereof.

10. An anhydrous antiperspirant composition, according to any one of claims 1 to 9, in which the cosmetically acceptable carrier is present in an amount of about 30 to about 80% by weight, preferably in the range of about 40 to about 70% by weight, and especially in the range of about 50% to 60% by weight, relative to the total weight of the composition.

1 1 . Method for avoiding undesired stains on fabrics and skin, wherein an effective amount of an anhydrous antiperspirant composition, as defined in any one of claims 1 to 10, is applied on the keratinous material.

12. Use of the combination of (a) at least one suspending agent and (b) at least one polyamide oil thickener, for the manufacture of an anhydrous antiperspirant composition, as defined in any one of claims 1 to 10.