A cosmetic composition

Abstract

The present invention is in the field of cosmetic compositions, in particular, compositions which can provide sweat management benefit. Disclosed is a cosmetic composition comprising an oil-in-water emulsion wherein said emulsion comprising: (i) an oil phase comprising a lipophilic material having a melting point greater than 37°C; (ii) a nonionic surfactant; and (iii) a cationic surfactant which is ethyl lauroyl arginate HCl.

Description

[0001] A COSMETIC COMPOSITION

[0002] Field of the invention

[0003] The present invention is in the field of cosmetic compositions, particularly compositions which can provide sweat management benefit, which is capable of preventing sweat from rapidly being released, absorbing or managing excess sweat.

[0004] Background of the invention

[0005] The present invention relates to cosmetic compositions, particularly compositions which can provide sweat management benefit. The compositions are used to control or manage moisture (or excess sweat) on the skin surface upon topical application of the compositions to the body, particularly to the underarm regions of the human body viz. the axilla, and sometimes even on the upper part of the body near the chest. Such composition can help prevent sweat from rapidly being released, absorb or manage excess sweat on skin surface upon topical application of the compositions to the body.

[0006] Summary of the invention

[0007] The present inventors have surprisingly observed that a cosmetic composition comprising oil-in-water emulsion which comprising lipophilic material having high melting point, a nonionic surfactant and certain cationic surfactant can lead to sweat management benefit. In addition to being stable, the composition is capable of forming precipitation / aggregation when it has been applied on skin and once the water of the emulsion has evaporated to some extent at least, thereby is capable of preventing sweat from rapidly being released, absorbing or managing excess sweat. In this manner, such composition can control or manage moisture (or excess sweat) on the desired skin surface.

[0008] In accordance with a first aspect is disclosed a cosmetic composition comprising an oil- in-water emulsion wherein said emulsion comprises:

[0009] (i) oil phase comprising a lipophilic material having a melting point greater than 37°C;

[0010] (ii) a nonionic surfactant; and (iii) a cationic surfactant which is ethyl lauroyl arginate HCI;

[0011] In accordance with a second aspect is disclosed a method of preventing sweat from rapidly being released, absorbing or managing excess sweat comprising a step of topical application of the composition of the first aspect on to the desired skin surface.

[0012] In accordance with a third aspect is disclosed use of the composition of the first aspect for preventing sweat from rapidly being released, absorbing or managing excess sweat on desired skin surface.

[0013] All other aspects of the present invention will more readily become apparent upon considering the detailed description and examples which follow.

[0014] Except in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and / or use may optionally be understood as modified by the word “about”.

[0015] All amounts are by weight of the composition, unless otherwise specified.

[0016] It should be noted that in specifying any ranges of values, any particular upper value can be associated with any particular lower value.

[0017] For the avoidance of doubt, the word “comprising” is intended to mean “including” but not necessarily “consisting of” or “composed of”. In other words, the listed steps or options need not be exhaustive.

[0018] The disclosure of the invention as found herein is to be considered to cover all embodiments as found in the claims as being multiply dependent upon each other irrespective of the fact that claims may be found without multiple dependency or redundancy.

[0019] Where a feature is disclosed with respect to a particular aspect of the invention (for example a composition of the invention), such disclosure is also to be considered to apply to any other aspect of the invention (for example a method of the invention) mutatis mutandis.

[0020] Detailed description of the invention

[0021] By “A cosmetic composition” as used herein, is meant to include a composition for topical application to the skin of mammals, especially humans. Such a composition is preferably of the leave-on type. By a leave-on composition is meant a composition that is applied to the desired skin surface and left on for one minute to 24 hours after which it may be wiped or rinsed off with water, usually during the regular course of personal washing. The composition may also be formulated into a product which is applied to a human body for improving the appearance, cleansing, odor control or general aesthetics. The composition of the present invention can be in the form of a liquid, lotion, cream, gel or stick form and may be delivered through a roll-on device or using an aerosol can which contains a propellant. “Skin” as used herein is meant to include skin on any part of the body (e.g., neck, chest, back, arms, underarms, hands, legs, buttocks and scalp) especially the underarms. The cosmetic composition in accordance with the present invention is sweat management composition which is used for providing sweat management benefit which is preventing sweat from rapidly being released, absorbing or managing excess sweat on the skin surface.

[0022] Melting point

[0023] “Melting point” refers to the temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. “Melting point” for the purpose of the present invention is specified at a standard pressure such as 1 atmosphere.

[0024] HLB value

[0025] “HLB value” refers to a value defining the affinity of a surfactant for water or oil. HLB numbers can be calculated for nonionic surfactants, and these surfactants have numbers ranging from 0-20.

[0026] Oil-in-water emulsion Oil-in-water emulsion comprises an oil phase and a water phase wherein oil phase is the dispersed phase and water is the dispersion medium.

[0027] Compositions of the present invention comprise an oil-in-water emulsion.

[0028] It is preferred that the droplet size of oil-in-water emulsion of the present invention is 0.02 to 25 microns, and more preferably 0.05 to 10 microns, and furthermore preferably 0.05 to 5 microns.

[0029] Lipophilic material

[0030] “ Lipophilic material” for the purpose of the present invention means a material which tends to combine with or dissolve in lipids, oils or fats.

[0031] It is required that the lipophilic material used in the present invention has relatively high melting point.

[0032] The composition in accordance with this invention comprises an oil-in-water emulsion comprising an oil phase wherein said oil phase comprises a lipophilic material.

[0033] The lipophilic material in accordance with this invention has a melting point greater than 37°C, preferably greater than 40°C, more preferably greater than 45°C, furthermore preferably greater than 48°C.

[0034] It is preferred that the lipophilic material is selected from a group consisting of a hydrogenated oil, a fatty alcohol, a fatty acid, a fatty ester, a petroleum oil, and a wax.

[0035] It is more preferred that the lipophilic material is a hydrogenated oil selected from a group consisting of hydrogenated soybean oil, hydrogenated palm oil, hydrogenated corn oil, hydrogenated peanut oil, hydrogenated cottonseed oil, hydrogenated olive oil, hydrogenated avocado oil, and hydrogenated castor oil.

[0036] It is more preferred that the lipophilic material is a wax selected from a group consisting of glycerol tristearate, glyceryl tridodecanoat, glycerol cinnamate, carnauba wax, candelilla wax, beeswax, permulgin wax, rice Bran wax, siliconyl candelilla wax, tribehenin, rhuswax, sugarcane wax, C18-36 acid triglyceride, and C18-36 acid glycol ester.

[0037] It is furthermore preferred that the lipophilic material is selected from group consisting of hydrogenated soybean oil, hydrogenated palm oil, hydrogenated peanut oil, hydrogenated cottonseed oil, beeswax, and tribehenin.

[0038] The composition in accordance with this invention may comprises 0.5 to 60%, preferably 1 to 50%, more preferably 2 to 40%, furthermore preferably 3 to 40% of the lipophilic material by weight of the composition.

[0039] It is preferred that the compositions in accordance with this invention comprises at least 4%, preferably from 4 to 50%, and more preferably from 6 to 40%, and furthermore preferably from 8 to 35% the lipophilic material by weight of the composition.

[0040] Nonionic surfactant

[0041] The composition in accordance with this invention comprises a nonionic surfactant. It is particularly preferred that the nonionic surfactant has an HLB value of 10 or lower, more preferably 9 or lower. It is preferred that the melting point of such nonionic surfactant is greater than 37°C. It is furthermore preferred that the melting point of such non-ionic surfactant is greater than 40°C. Such nonionic surfactant is different from the lipophilic material above.

[0042] It is preferred that the nonionic surfactant is selected a group consisting of steareth-2, ceteth-2, polyglyceryl-2 stearate, polyglyceryl-2-distearate, polyglyceryl-3 distearate, sorbitan palmitate, glycerol stearate, glycol stearate, sucrose polystearate, cetyl palmitate, sorbitan tristearate, sorbitan monopalmitate, diethylene glycol monostearate, glycerol monostearate, sorbitan monostearate, PEG-8 beewax, Sorbeth-20 beewax, PEG-2 stearate, glyceryl myristate, glyceryl oleate, glyceryl stearate. It is more preferably selected from a group consisting of steareth-2, ceteth-2, polyglyceryl-2 stearate, polyglyceryl-2-distearate, polyglyceryl-3 distearate, sorbitan palmitate, sucrose polystearate, sorbitan monostearate, furthermore preferably is selected from a group consisting of steareth-2, ceteth-2, polyglyceryl-2 stearate, polyglyceryl-2- distearate, polyglyceryl-3 distearate.

[0043] It is preferred that the composition in accordance with this invention further comprises a nonionic surfactant having an H LB of 11 or more.

[0044] It is preferred that the additional nonionic surfactant is selected from a group consisting of steareth-20, steareth-21 , ceteareth-20, Tween 80, ceteth-20, PEG-40 stearate, PEG- 80 sorbitan laurate, lsoceteth-20, lsosteareth-20, laureth-23, Oleth-10, Oleth-20, PEG- 100 stearate, PEG-20 methyl glucose sesquistearate, PEG-60 almond glycerides, PEG- 8 laurate, polysorbate 20, polysorbate 60, polysorbate 80, polyglyceryl-10 stearate, polyglyceryl-10 monopalmitate. It is more preferably selected from a group consisting of steareth-20, steareth-21 , polyglyceryl-10 stearate, polyglyceryl-10 monopalmitate, polyglyceryl-20 stearate, ceteareth-20, Tween 80, ceteth-20, laureth-23, Oleth-10, Oleth-

[0045] 20, furthermore preferably is selected from a group consisting of steareth-20, steareth-

[0046] 21 , polyglyceryl-10 stearate, polyglyceryl-10 monopalmitate, polyglyceryl-20 stearate.

[0047] It is preferred that the composition in accordance with this invention comprises from 0.5 to 40%, and more preferably from 2 to 30%, and furthermore preferably from 4 to 25% the nonionic surfactant, and most preferably from 5 to 20% by weight of the composition.

[0048] Cationic surfactant

[0049] The cationic surfactant in accordance with this invention is ethyl lauroyl arginate HCI.

[0050] It is preferred that the composition comprises from 0.1 to 25% of the cationic surfactant, more preferably from 0.5 to 15%, furthermore preferably from 1 to 10% by weight of the composition. pH of compositions

[0051] The pH of the composition of the present invention is from 3 to 10, preferably from 4 to

[0052] 8.5, more preferably 5 to 8. Other ingredients

[0053] Other components commonly included in cosmetic compositions may also be incorporated in the compositions of the present invention. Such components include skin care agents such as emollients, humectants and skin barrier promoters; skin appearance modifiers such as skin lightening agents and skin smoothing agents; antimicrobial agents, in particular organic anti-microbial agents, and preservatives.

[0054] The composition may include skin actives selected from a group consisting of alphahydroxy acids, acetyl methionine, mandelic acid, methylxanthines, alkaloids and caffeine.

[0055] The compositions of the invention are applied cosmetically and topically to the skin, broadly speaking, by one of two methods. Different consumers prefer one method or the other. In one method, sometimes called a contact method, the composition is wiped across the surface of the skin, depositing a fraction of the composition as it passes. In the second method, sometimes called the non-contact method, the composition is sprayed from a dispenser held proximate to the skin, often in an area of about 10 to 20 cm2. The spray can be developed by mechanical means of generating pressure on the contents of a dispenser, such as a pump or a squeezable sidewall or by internally generated pressure arising from a fraction of a liquefied propellant volatilizing, the dispenser commonly being called an aerosol.

[0056] There are broadly speaking two classes of contact compositions, one of which is liquid and usually applied using a roll-on dispenser or possibly absorbed into or onto a wipe, and in the second of which the active is distributed within a carrier liquid that forms a continuous phase that has been gelled. In one variation, the carrier fluid comprises a solvent for the active and in a second variation, the active remains a particulate solid that is suspended in an oil, usually a blend of oils.

[0057] It is preferred that the composition of the invention is in the form of a cream, a spray, a firm solid, a soft solid, wipes, or is an emulsion packaged in a roll-on applicator, more preferably in the form of lotion, spray, firm solid, soft solid, cream, or is an emulsion packaged in a roll-on applicator.

[0058] It is preferred that, when said composition is a spray it comprises a propellant and the composition is in the form of an aerosol.

[0059] It is preferred that, when said composition is a spray it comprises a propellant and the composition is in the form of an aerosol.

[0060] Further preferably, the composition of the invention is in the form of a roll-on product.

[0061] Wipes here are intended for applying the composition. Wipes are usually made of materials such as polyester, polypropylene, cotton, wood pulp, or rayon fibers formed into sheets. They may be packaged individually, or in small or bulk packaging. They are usually moistened with water, or ethanol or other ingredients that help them work. They may contain other ingredients, such as preservatives to prevent the growth of bacteria and molds.

[0062] The compositions in accordance with this invention may comprise an antiperspirant active. However, the composition is preferably free from aluminum / zirconium salt or zinc-based antiperspirant active.

[0063] Non-aluminum and non-zirconium, non-zinc antiperspirant actives may be present in the composition. Non- aluminum or zirconium, or non-zinc antiperspirant active is preferably selected from glycerol monolaurate plus isostearyl alcohol, chitosan or a salt thereof with a weight average molecular weight of from 250 to 650 kDa, titanium compound chelated by alkanolamine with an acid and a polyhydric alcohol, or cholic acid derivative selected from a hydroxycholic acid or a salt thereof with a multivalent metal salt.

[0064] Roll-on Liquid compositions that are applicable from a roll-on broadly speaking can be divided into two classes, namely those in which an active is suspended in a hydrophobic carrier, such as a volatile silicone and those in which the active is dissolved in a carrier liquid. The latter has proven to be more popular. There are mainly two sorts of dissolving carrier liquid, namely carriers that are predominantly alcoholic, which is to say the greater part of the dissolving carrier fluid comprises ethanol and the second class in which the carrier liquid is mainly water. The former was very popular because ethanol is a mild bactericide in its own right, but its popularity waned because it stings, especially if the surface onto which the composition has been applied has been damaged or cut, such as can easily arise during shaving or other depilatory actions.

[0065] The second class of formulations that is an alternative to alcoholic formulations comprise a dispersion of water-insoluble or very poorly water-soluble ingredients in an aqueous solution of the active. Herein, such compositions will be called emulsions. Roll-on emulsions commonly comprise one or more emulsifiers to maintain a distribution of the water-soluble ingredients.

[0066] Aerosol compositions

[0067] Further alternatively, the composition of the invention is delivered through an aerosol composition which comprises a propellant in addition to the applicable other ingredients described hereinabove. Commonly, the propellant is employed in a weight ratio to the base formulation of from 95:5 to 5:95. Depending on the propellant, in such aerosol compositions the ratio of propellant to base formulation is normally at least 20:80, generally at least 30:70, particularly at least 40:60, and in many formulations, the weight ratio is from 90:10 to 50:50. A ratio range of from 70:30 to 90:10 is sometimes preferred.

[0068] Propellants herein generally are one of three classes; (i) low boiling-point gasses liquified by compression, (ii) volatile ethers and (iii) compressed non-oxidising gases.

[0069] Class (i) is conveniently a low boiling-point material, typically boiling below -5°C, and often below -15°C, and in particular, alkanes and / or halogenated hydrocarbons. This class of propellant is usually liquefied at the pressure in the aerosol canister and evaporates to generate the pressure to expel the composition out of the canister. Examples of suitable alkanes include particularly propane, butane or isobutane. The class (ii) of propellant comprises a very volatile ether of which the most widely employed ether hitherto is dimethyl ether. This propellant can advantageously be employed at relatively low weight ratio of propellant to base formulation, for example to as low as 5:95. It can also be employed in admixture with, for example, compressible / liquefiable alkane gasses. The class (iii) of propellant comprises compressed non-oxidising gasses, and in particular carbon dioxide or nitrogen. Inert gases like neon are a theoretical alternative.

[0070] The composition of the present invention can comprise a wide range of other optional components. The CTFA Personal Care Ingredient Handbook, Second Edition, 1992, which is incorporated by reference herein in its entirety, describes a wide variety of non-limiting personal care and pharmaceutical ingredients commonly used in the skin care industry, which are suitable for use in the compositions of the present invention. Examples include: antioxidants, binders, biological additives, buffering agents, colorants, thickeners, polymers, astringents, fragrance, conditioners, exfoliating agents, pH adjusters, other than the ones already discussed earlier, preservatives, natural extracts, essential oils, skin sensates, skin soothing agents, and skin healing agents.

[0071] A preservative is a preferred additional component in compositions of the invention. A preservative serves to reduce or eliminate microbial contamination of compositions of the invention. Preservatives are typically employed at a total level of from 0.05 to 3%, preferably at from 0.1 to 2% and most preferably at from 0.4 to 1%.

[0072] Suitable preservatives for use with the present invention include 2-phenoxyethanol, polylysine, iodopropynyl butylcarbamate, C1-C3 alkyl parabens, sodium benzoate, caprylyl glycol and EDTA. Particularly preferred preservatives are 2-phenoxyethanol, iodopropynyl butylcarbamate, sodium benzoate, caprylyl glycol and EDTA and especially preferred are 2-phenoxyethanol and iodopropynyl butylcarbamate.

[0073] A preferred additional component of compositions of the invention is a fragrance. Suitable materials include conventional perfumes, such as perfume oils and also include so-called deo-perfumes, as described in EP 545,556 and other publications.

[0074] Levels of incorporation are preferably up to 4% by weight, particularly from 0.1% to 2% by weight, and especially from 0.7% to 1 .7% by weight.

[0075] An antimicrobial deodorant active is a preferred an additional component in compositions of the invention. Such components serve to reduce or eliminate body odour by reducing or otherwise impeding the function of microbes on the skin of the body responsible for malodour generation.

[0076] The antimicrobial deodorant active may also be a preservative for the composition.

[0077] When employed, the anti-microbial deodorant agent is typically incorporated into the composition at from 0.01% to 3% and particularly at from 0.03% to 0.5%.

[0078] Preferred anti-microbial deodorant agents have a minimum inhibitory concentration (MIC) of 1 mg. ml-1or less, particularly 200 pg. ml'1or less, and especially 100 pg. ml'1or less. The MIC of an anti-microbial agent is the minimum concentration of the agent required to significantly inhibit microbial growth. Inhibition is considered “significant” if an 80% or greater reduction in the growth of an inoculum of Staphylococcus epidermidis is observed, relative to a control medium without an anti-microbial agent, over a period of 16 to 24 hours at 37°C. Details of suitable methods for determining MICs can be found in “Antimicrobial Agents and Susceptibility Testing”, C.Thornsberry, (in “Manual of Clinical Microbiology”, 5thEdition, Ed. A. Balows et al, American Society for Microbiology, Washington D.C., 1991). A particularly suitable method is the Macrobroth Dilution Method as described in Chapter 110 of above publication (pp.

[0079] 1101-1111) by D. F. Sahm and J. A. Washington II. MICs of anti-microbials suitable for inclusion in the compositions of the invention are triclosan: 0.01-10 pg. ml'1(J. Regos et al., Dermatologica (1979), 158: 72-79) and farnesol: ca. 25 pg. ml'1(K. Sawano, T.

[0080] Sato, and R. Hattori, Proceedings of the 17thIFSCC International Conference, Yokahama (1992) p.210-232). By contrast ethanol and similar alkanols have MICs of greater than 1 mg. ml'1. Suitable organic anti-microbials are bactericides, for example quaternary ammonium compounds, like cetyltrimethylammonium salts; chlorhexidine and salts thereof; and diglycerol monocaprate, diglycerol monolaurate, glycerol monolaurate, and similar materials, as described in “Deodorant Ingredients”, S.A. Makin and M.R. Lowry, in “Antiperspirants and Deodorants”, Ed. K. Laden (1999, Marcel Dekker, New York). More preferred anti-microbials for use in the compositions of the invention are polyhexamethylene biguanide salts (also known as polyaminopropyl biguanide salts), an example being Cosmocil CQ™ available from Zeneca PLC, preferably used at up to 1% and more preferably at 0.03% to 0.3% by weight; 2',4,4'-trichloro,2-hydroxy- diphenyl ether (triclosan), preferably used at up to 1% by weight of the composition and more preferably at 0.05-0.3%; and 3,7,11-trimethyldodeca-2,6,10-trienol (farnesol), preferably used at up to 1% by weight of the composition and more preferably at up to 0.5%.

[0081] Other suitable organic antimicrobial agents are transition metal chelators, as described in W001 / 52805, for example. Transitional metal chelators having a binding coefficient for iron(lll) of greater than 1026, for example diethylenetriaminepentaacetic acid and salts thereof are preferred.

[0082] Method and Use

[0083] The present invention also provides for a method of preventing sweat from rapidly being released, absorbing or managing excess sweat comprising a step of topical application of the composition of the first aspect. Preferably, the present invention provides for a method wherein the composition of the first aspect is applied on the underarms. The present invention also provides for a method wherein topical application of the composition of the first aspect preventing sweat from rapidly being released, absorbing or managing excess sweat on the desired skin surface of the human body. “Preventing sweat from rapidly being released” herein means reducing the rate of release of sweat. The method in accordance with the invention is preferably non-therapeutic. By non-therapeutic is meant that the method is cosmetic in nature.

[0084] The invention also provides for use of the composition of the first aspect for preventing sweat from rapidly being released, absorbing or managing excess sweat on the desired skin surface. Preferably, the desired skin surface is the skin of underarms. “Preventing sweat from rapidly being released” herein means reducing the rate of release of sweat. The use in accordance with the invention is preferably non-therapeutic in nature, more preferably cosmetic in nature.

[0085] The invention will now be demonstrated with the help of the following non-limiting examples.

[0086] Examples

[0087] Examples

[0088] Materials listed in Table 1 were put through some tests as detailed hereinafter.

[0089] TABLE 1

[0090] Example 1

[0091] This example demonstrated the composition as per the invention are more capable of forming an aggregation / precipitation under the test conditions. The compositions acc ording to the formulations detailed in Table 2 are prepared. All ingredients are expressed by weight percent of the total formulation, and as level of active ingredient.

[0092] TABLE 2 Experiment methods:

[0093] The effect of the compositions was measured according to the procedure described as below:

[0094] AE100 membrane filter was treated by evenly spreading 300mg compositions on surface and followed by heating for 30 minutes at 37°C with 43% humidity. The effect was measured by measuring the flow rate (g / s) of 250g water passing through the treated membrane filter under 200mbar pressure. The lower the flow rate is, more aggregation / precipitations are formed. Results are summarized in Table 3 below:

[0095] TABLE 3

[0096] The results (shown in the Table 3) demonstrate that compositions as per the invention (Sample 1) is more capable of forming an aggregation / precipitation under the test conditions disclosed earlier, which further indicates their ability to effectively prevent sweat from rapidly being released, absorb or manage excess sweat when used in a cosmetic composition, comparing with the composition outside the invention (Sample A).

[0097] Example 2

[0098] This example demonstrated composition as per the invention are more capable of forming an aggregation / precipitation when it contacts with aqueous saline media. All ingredients are expressed by weight percent of the total formulation, and as level of active ingredient.

[0099] The compositions indicated in Table -4 were prepared.

[0100] TABLE 4

[0101] The composition of model ionic sweat (pH 6.9) is as given below in Table -5:

[0102] TABLE -5 Testing On A Narrow Capillary Apparatus

[0103] An experiment was arranged using the device as disclosed in the International Application WO2018099931 A1 (Unilever). The device has a 20X20 pm channel. Before use, the channel was filled with model ionic sweat. The surface tension of the model ionic sweat is strong and prevents its flowing in the capillary. The concerned compositions in Table-4, was placed at one end of the channel. When the composition contacts with the model ionic sweat, the composition of the present invention is believed to turn into something like an aggregation / agglomeration. This phenomenon simulates the manner in which an active agent forms aggregation / agglomeration thereby provides benefit of preventing sweat from rapidly being released, absorbing or managing excess sweat in the underarm region.

[0104] The whole process was monitored under optical microscope (Leica™ DM 2500P).

[0105] The efficacy was investigated by measuring the least hydraulic pressure needed for the water to pass through the capillary with flow rate not lower than 0.1 L / min. The least hydraulic pressure is believed to be affected (improved) by the presence of the aggregation or the precipitate. If the least hydraulic pressure is high, it indicates the good formation of an aggregation or a precipitate with at the end of the channel. The water was pumped into the channel from the other end of the channel by using pressure pump with flow-rate monitor and hydraulic pressure control (MFCStm-EZ, FLUIGENT).

[0106] The data on the aggregation / agglomeration formation of the compositions at the end of the channel after 60 minutes is summarized in Table -6 below:

[0107] TABLE-6

[0108] The data in Table -6 above indicates that compositions as per the invention (Sample 2) is more capable of forming an aggregation / precipitation under the test conditions disclosed earlier, which further indicates their ability to effectively prevent sweat from rapidly being released, absorb or manage excess sweat when used in a cosmetic composition, comparing with the composition outside the invention (Sample B).

Claims

CLAIMS1. A cosmetic composition comprising an oil-in-water emulsion wherein said emulsion comprising:(i) an oil phase comprising a lipophilic material having a melting point greater than 37°C;(ii) a nonionic surfactant; and(iii) a cationic surfactant which is ethyl lauroyl arginate HCI.

2. A composition as claimed in claim 1 wherein said lipophilic material has a melting point greater than 40°C.

3. A composition as claimed in claim 1 or 2 wherein said lipophilic material is selected from a group consisting of a hydrogenated oil, a fatty alcohol, a fatty acid, a fatty ester, a petroleum oil, a wax or a mixture thereof.

4. A composition as claimed in any of claims 1 to 3 wherein said composition comprises from 0.5 to 60% of said lipophilic material by weight of the composition.

5. A composition as claimed in any of claims 1 to 4 wherein said nonionic surfactant has an HLB value of 10 or lower.

6. A composition as claimed in any of claims 1 to 5 wherein said composition comprises from 0.5% to 40% of said nonionic surfactant by weight of the composition.

7. A composition as claimed in any of claims 1 to 6 wherein said composition comprises from 0.1 to 25% of said cationic surfactant by weight of the composition,8. A composition as claimed in any of claims 1 to 7 wherein said composition is free from aluminium / zirconium salts or zinc based antiperspirant active.

9. A composition as claimed in any of claims 1 to 8 wherein said composition comprises a fragrance.

10. A composition as claimed in any of claims 1 to 9 wherein said composition comprises an antimicrobial deodorant active.

11. A composition as claimed in any of claims 1 to 10 wherein said composition is in the form of a cream, a spray, a firm solid, a soft solid, wipes, or is an emulsion packaged in a roll-on applicator.

12. A composition as claimed in any of claims 1 to 11 when said composition is in the form of in the form of a roll-on product.

13. A method of preventing sweat from rapidly being released, absorbing or managing excess sweat comprising a step of topical application of the composition as claimed in any of claims 1 to 12 on to the desired skin surface.

14. Use of a composition as claimed in any of claims 1 to 12 for preventing sweat from rapidly being released, absorbing or managing excess sweat on the desired skin surface.

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