A cleansing composition and application thereof

Abstract

The present disclosure provides a composition comprising at least one amino-acid based surfactant; and propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight, wherein the composition has pH in a range of 4.5 to 6.5. The present disclosure also provides a method of treating a keratin surface and a process of removing make-up from a keratin surface.

Description

A CLEANSING COMPOSITION AND APPLICATION THEREOFFIELD OF INVENTION

[0001] The present disclosure relates to the field of personal care products and, particularly, to cleansing compositions. The present disclosure also relates to composition for cleansing keratin surface and removing make-up from keratin surface such as skin and methods thereof.BACKGROUND OF THE INVENTION

[0002] An optimized cleansing regimen is the first key step to achieve radiant and glowing skin. There is an increasing awareness amongst the consumers for skin compatible cleansers which has optimal pH and provide improved skin tone.

[0003] Many consumer products in the market claim a single cleanser to give a one- step instant glow, replacing lengthy skin care routine. However, the cosmetic formula faces challenges to provide multiple desirable outcomes at a single go. It is necessary for the products to provide and maintain a soft and smooth skin while dealing with instant and long-lasting oil control yet retaining moisture for a non-drying feel, along with cleansing effect.

[0004] In today’s world make-up wearing had largely increased and removing make-up has become evident part of skin routine. In general, make-up removing is multi-step process such as cleansing with cream or oil, and then facial cleansing using soap or cleansing foam. Thus, users demand for cleansers which could remove make-up and also foam well, to cleanse the skin and yet be skin compatible.

[0005] Therefore, there is a need to develop a cleansing composition with optimized combination of mild cleansing agents and with desired product texture which is capable of simultaneously removing make-up and cleansing the skin.SUMMARY OF THE INVENTION

[0006] In an aspect of the present disclosure, there is provided a cosmetic composition comprising: i. at least one amino-acid based surfactant; and ii. propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight, wherein the composition has pH in a range of 4.5 to 6.5.

[0007] In another aspect of the present disclosure, there is provided a method of treating a keratin surface, the method comprising applying the composition as disclosed herein on the keratin surface to obtain foam and rinsing off the composition.

[0008] In one another aspect of the present disclosure, there is provided a cosmetic process of removing make-up from a keratin surface, the process comprising applying the composition as disclosed herein on a maked-up keratin surface, working off the composition, and removing the make-up from the maked-up keratin surface.

[0009] These and other features, aspects, and advantages of the present subject matter will be better understood with reference to the following description and appended claims. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.DETAILED DESCRIPTION OF THE INVENTION

[0010] Those skilled in the art will be aware that the present disclosure is subject to variations and modifications other than those specifically described. It is to be understood that the present disclosure includes all such variations and modifications. The disclosure also includes all such steps, features, compositions, and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any or more of such steps or features.Definitions

[0011] For convenience, before further description of the present disclosure, certain terms employed in the specification, and examples are delineated here. These definitions should be read in light of the remainder of the disclosure and understood as by a person of skill in the art. The terms used herein have the meaningsrecognized and known to those of skill in the art, however, for convenience and completeness, particular terms and their meanings are set forth below.

[0012] The articles “a”, “an” and “the” are used to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article.

[0013] The terms “comprise” and “comprising” are used in the inclusive, open sense, meaning that additional elements may be included. It is not intended to be construed as “consists of only”.

[0014] The term "at least one" is used to mean one or more and thus includes individual components as well as mixtures / combinations.

[0015] Throughout this specification, unless the context requires otherwise the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated element or step or group of elements or steps but not the exclusion of any other element or step or group of element or steps.

[0016] The term “including” is used to mean “including but not limited to”, “including” and “including but not limited to” are used interchangeably.

[0017] The term “about” is used to mean an acceptable error range for the particular value as determined by one of ordinary skill in the art, which can depend in part on how the value is measured or determined, i.e., the limitations of the measurement system. For example, "about" can mean within 1 or more than 1 standard deviation, per the practice in the art. Where particular values are described in the present disclosure, unless otherwise stated the term "about" meaning within an acceptable error range for the particular value should be assumed.

[0018] The term “INCI” is an abbreviation of International Nomenclature of Cosmetic Ingredients, which is a system of names provided by the International Nomenclature Committee of the Personal Care Products Council to identify cosmetic or personal care ingredients.

[0019] All percentages, parts and ratios are based upon the total weight of the compositions of the present disclosure unless otherwise indicated. Ratios, concentrations, amounts, and other numerical data may be presented herein in a range format. It is to be understood that such range format is used merely forconvenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. For example, a percentage range of 1.5 to 6.5% should be interpreted to include not only the explicitly recited limits of 1.5 to 6.5%, but also to include sub-ranges, such as 1.5 to 6%, 1.5 to 5%, 2 to 4 %, and so forth, as well as individual amounts, including fractional amounts, within the specified ranges, such as 1.65%, 2.0%, 3.0% and 6% for example.

[0020] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the disclosure, the preferred methods and materials are now described.

[0021] The present disclosure is not to be limited in scope by the specific embodiments described herein, which are intended for the purposes of exemplification only. Functionally equivalent products, compositions, and methods are clearly within the scope of the disclosure, as described herein.

[0022] As discussed in the background, self-care is increasing day by day and there is always a need for an effective composition for skin cleansing and make-up removal. Existing cleansing compositions have associated challenges in providing cleansing as well as make-up removing capability along with skin respect pH. Further, the existing cleansers have stability issues and less foaming characteristics. Accordingly, the present composition provides a cleansing composition which provides instant cleansing of the skin with high foamability and also exhibits makeup removal ability. The composition of the present disclosure comprises an aminoacid based surfactant and propylene glycol laurate, with pH in a range of 4.5 to 6.5. The composition provides significant effect in make-up removal. The presence of propylene glycol laurate in the composition is advantageous since it is insoluble in water and oil and disperses make-up dirt at interface significantly. Additionally, the amino-acid based surfactants make the composition stable and provides skin-compatible pH. Further, the combination of amino-acid based surfactants and propylene glycol laurate provides high foaming characteristics.

[0023] Accordingly, embodiments of the present disclosure include a cleansing composition, a self-care product comprising a composition and a method for treating keratin surface, such as skin. The disclosed embodiments of the present disclosure show the make-up removing ability of the cleansing composition. Embodiments of the present disclosure further provides cleansing composition which works as a “reset” kind of skin cleanser hence exhibits soothing after sun exposure. Further, the composition is mild on skin lipids and proteins, provides brightening, nourishment, glow and radiance to the skin.

[0024] Accordingly, the present invention provides a cosmetic composition comprising at least one amino-acid based surfactant and propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight, wherein the composition has pH in a range of 4.5 to 6.5. The present invention further provides a method of treating and / or cleansing a keratin surface, such as skin, and a cosmetic process for removing make-up from a maked-up keratin surface. The present invention further provides use of the composition for cleansing and removing make-up from a keratin surface such as skin.Composition

[0025] Embodiments herein provide a cosmetic composition for cleansing and treating a keratin surface, in particular the skin. The composition of the present invention exhibits cleansing as well as make-up removal ability at skin respect pH. The composition is high foaming with rich and stable foam, with no residual dryness, balances hydration, mild and easily rinses off the keratin surface.

[0026] The composition according to embodiments herein is a combination of at least one amino-based surfactant and propylene glycol laurate, with skin optimal pH.

[0027] Embodiments herein provide a composition comprising at least one aminoacid based surfactant and propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight, wherein the composition has pH in a range of 4.5 to 6.5. Thecomposition according to embodiments herein include at least one pH adjusting agent, and surfactants selected from amphoteric surfactant and non-ionic surfactant. The composition also comprises water.

[0028] Embodiments herein provide a composition possessing both cleansing and make-up removing ability.

[0029] Embodiments herein also provide a transparent composition possessing rich foaming ability.

[0030] Embodiments herein further provide a composition for cleansing and / or treating a keratin surface such as skin. Particularly, embodiments herein provide a composition for make-up removal from a maked-up keratin surface and for cleansing the keratin surface such as the skin.Propylene glycol laurate

[0031] Embodiments herein provide a cosmetic composition comprising propylene glycol laurate. In particular, the composition according to embodiments herein comprises propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight.

[0032] Embodiments herein provide a composition comprising propylene glycol laurate preferably is in an amount ranging from 1.5 to 6% by weight, relative to total weight of the composition.

[0033] In an embodiment, propylene glycol laurate is in an amount ranging from 1.5 to 6% by weight, relative to total weight of the composition.Amino-acid based surfactant

[0034] Embodiments herein provide a cosmetic composition comprising at least one amino-acid based surfactant.

[0035] The composition, according to embodiments herein, includes at least one amino-acid based surfactant. The term “amino-acid based surfactant” refers to anionic surfactants comprising anionic amino-acid based surface-active groups which decrease the surface tension or interfacial tension between two liquids, a liquid and a gas, or a liquid and a solid.

[0036] These surfactant bears at least one permanent negative charge or when it can be ionized into a negatively charged species, under the conditions of use of the composition of the present invention (for example the medium or the pH) and does not comprise any cationic charge.

[0037] In an embodiment, the amino-acid based surfactant is selected from Formula (I)whereinZ represents a linear or branched alkyl or alkenyl group having 6 to 22 carbon atoms,X is hydrogen or methyl group, n is selected from 0 to 2,Y is selected from hydrogen, -CH3, -CH(CH3)2, -CH2CH(CH3)2, - CH(CH3)CH2CH3, -CH2C6H5, -CH2C2H4OH, -CH2OH, -CH(OH)CH3, - (CH2)4NH2, -(CH2)3NHC(NH)NH2, -CH2C(O)O M+’ -(CH2)2C(O)OH, and - (CH2)2C(O)O M+, and M is a salt-forming cation wherein COO’ is a counteranion.

[0038] Examples of the amino-acid based surfactants include but are not limited to salts of alanine, arginine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, phenylalanine, serine, tyrosine, valine, sarcosine, and any mixtures thereof. Preferably the amino-acid based surfactants include alaninate, glycinates, glutamates, sarcosinates, or combinations thereof.

[0039] More specifically, the amino-acid based surfactant is preferably selected from sodium cocoyl alaninate, sodium cocoyl glycinate, sodium cocoyl sarcosinate, sodium lauroyl methylaminopropionate, dipotassium capryloyl glutamate, dipotassium undecylenoyl glutamate, disodium capryloyl glutamate, disodiumcocoyl glutamate, disodium lauroyl glutamate, disodium stearoyl glutamate, disodium undecylenoyl glutamate, potassium capryloyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate, potassium myristoyl glutamate, potassium stearoyl glutamate, potassium undecylenoyl glutamate, sodium capryloyl glutamate, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium olivoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, sodium undecylenoyl glutamate, potassium lauroyl sarcosinate, potassium cocoyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, ammonium lauroyl sarcosinate, or combinations thereof.

[0040] References can be made to the commercially available amino-acid based surfactants, for example, acylsarcosinates, for instance the sodium lauroyl sarcosinate sold under the name Sarkosyl NL 97® by the company Ciba or sold under the name Oramix L 30® by the company SEPPIC, the sodium myristoyl sarcosinate sold under the name Nikkol Sarcosinate MN® by the company Nikkol or the sodium palmitoyl sarcosinate sold under the name Nikkol Sarcosinate PN® by the company Nikkol; N-acylglutamates, for instance the triethanolamine monococoylglutamate sold under the name Acylglutamate CT- 12® by the company Ajinomoto and the triethanolamine lauroylglutamate sold under the name Acylglutamate LT-12® by the company Ajinomoto; and any mixture thereof.

[0041] In a preferred embodiment, the amino-acid based surfactant is selected from sodium cocoyl alaninate, sodium cocoyl glycinate, sodium cocoyl sarcosinate, sodium lauroyl methylaminopropionate, disodium cocoyl glutamate, sodium cocoyl glutamate, or combinations thereof.

[0042] In an embodiment, the amino-acid based surfactant is in an amount ranging from 1 to 40% by weight, preferably 3 to 40% by weight, and more preferably 4 to 35% by weight, relative to total weight of the composition. pH adjusting agent

[0043] Embodiments herein provide a cosmetic composition comprising at least one pH adjusting agent.

[0044] The composition, according to embodiments herein, include at least one pH adjusting agent. The pH adjusting agent as part of the composition maintain the pH of the composition in a range of 4.5 to 6.5.

[0045] The pH adjusting agent that may be used in the present invention is selected from citric acid, potassium acetate, potassium hydroxide, sodium carbonate, sodium hydroxide, phosphoric acid, succinic acid, sodium citrate, boric acid, lactic acid, sodium hydrogen carbonate, ethanolamines, or combinations thereof.

[0046] In a preferred embodiment, the pH adjusting agent is selected from citric acid, potassium acetate, potassium hydroxide, or combinations thereof.

[0047] The amount of pH adjusting agent in the composition, according to embodiments herein, may vary.

[0048] In an embodiment, the pH adjusting agent is in an amount ranging from 0.01 to 10% by weight, preferably 0.1 to 5% by weight, and more preferably 0.1 to 1% by weight, relative to total weight of the composition.Amphoteric surfactant

[0049] The composition, according to embodiments herein, may comprise at least one amphoteric surfactant(s).

[0050] Embodiments herein provide a composition comprising at least one amphoteric surfactant.

[0051] The term “amphoteric surfactant” as used herein refers to a surfactant having both anionic groups and cationic groups as ionizable groups. In an embodiment of the present disclosure, an entity is qualified as " amphoteric " when it has the ability to change between anionic properties, the isoelectric neutral stage, and the cationic properties, under the conditions of use of the composition of the present disclosure (medium, pH, for example)

[0052] The amphoteric surfactant(s) used in the composition according to an embodiment herein may be optionally quatemized amine derivatives containing at least one anionic group, for instance a carboxylate, sulfonate, sulfate, phosphate orphosphonate group, and in which the aliphatic group or at least one of the aliphatic groups is a linear or branched chain comprising from 8 to 22 carbon atoms.

[0053] In an embodiment, the amphoteric surfactant is selected from (Cs- C2o)alkylbetaines, sulfobetaine, hydroxysulfobetaine, (Cs-C2oalkyl)amido(C2- Csalkyl)betaine, (C8-C2oalkyl)amido(C2-C8alkyl)sulfobetaine, (Cs-Cu acyl) amphoacetates, (C8-Ci4acyl)amphoglycinates, or combinations thereof, preferably selected from (Cs-C2o)alkylbetaines, C8-C2oalkyl)amido(C2-C8alkyl)betaine, (Cs- C2oalkyl)amido(C2-Csalkyl) hydroxy sulfobetaines, (Cs-C2oalkyl)amido(C2- Csalkyl)sulfobetaines, or combinations thereof.

[0054] In an embodiment (Cs-C2o)alkylbetaines is selected from phenylbetaine, cetyl betaine, cocoylbetaine, decylbetaine, or combinations thereof. From alkylbetaines, cocoylbetaine is preferred, for example the products sold by the company Rhodia under the tradename Mirataine® BB / FLA.

[0055] In an embodiment, the amphoteric surfactants include the optionally quaternized amine derivatives, of respective structures (II) and (III) below:Ra-CON(Z')CH2-(CH2)m-N+(Rb)(Rc)(CH2COO ) (II) in which:Rarepresents a C10-C30 alkyl or alkenyl, preferably, alkyl or alkenyl present in hydrolysed coconut oil, a heptyl group, a nonyl group or an undecyl group, Rb represents hydrogen, alkyl or P -hydroxy ethyl group, Rcrepresents hydrogen, alkyl or carboxymethyl group; m is equal to 0, 1 or 2,Z' represents a hydrogen atom or a hydroxy ethyl or carboxymethyl group; Ra -CON(Z)CH2-(CH2)m -N(B)(B') (III) in which:B represents -CH2CH2OX', with X' representing -CH2-COOH, CH2- COOZ", -CH2CH2-COOH, -CH2CH2-COOZ’, or a hydrogen atom, B' represents -(CH2)Z-Y', with z = 1 or 2, and Y' representing -COOH, -COOZ", -CH2-CHOH-SO3H or -CH2-CHOH-SO3Z",m' is equal to 0, 1 or 2,Z' represents a hydrogen atom or a hydroxyethyl or carboxymethyl group,Z" represents an ion resulting from an alkali or alkaline-earth metal, such as sodium, potassium or magnesium; an ammonium ion; or an ion resulting from an organic amine and in particular from an amino alcohol, such as monoethanolamine, diethanolamine and triethanolamine, monoisopropanolamine, diisopropanolamine or triisopropanolamine, 2-amino-2-methyl-l -propanol, 2-amino-2-methyl-l,3- propanediol and tris(hydroxymethyl)aminomethane,Ra1represents a C10-C30 alkyl or alkenyl group, preferably alkyl or alkenyl present in hydrolysed linseed oil or coconut oil, an alkyl group, in particular a C17 alkyl group, and its iso form, or an unsaturated C17 group.

[0056] In particular, according to an embodiment, the amphoteric surfactants may be of betaine-based amphoteric surfactant, for example, (Cs-C2o)alkylbetaines, sulfobetaines, hydroxysulfobetaines, (C8-C2oalkyl)amido(C2-C8alkyl)betaines and (C8-C2oalkyl)amido(C2-C8alkyl)sulfobetaines. Preferably, the amphoteric surfactants are chosen from (C8-C2o)alkylbetaines, (Cs-C2o)alkylamido(C2- Cs)alkylbetaines, or combinations thereof. Preferably, the amphoteric surfactant is chosen from cocamidopropyl betaine (CAPB), cocoylbetaine, or combinations thereof.

[0057] In an embodiment, the amphoteric surfactant is in an amount ranging from 10 to 50% by weight, preferably 15 to 45% by weight, and more preferably 20 to 40% by weight, relative to total weight of the composition.Non-ionic surfactant

[0058] The composition, according to embodiments herein, comprising at least one non-ionic surfactant.

[0059] Embodiments herein provide a composition comprising at least one non- ionic surfactant.

[0060] The non-ionic surfactant includes an alkyl polyglucoside of formula (IV): RiO-(R2O)t-(G)v(IV) wherein,Ri is a linear or branched alkyl or alkenyl radical, comprising 6 to 24 carbon atoms, preferably 8 to 18 carbon atoms, or an alkylphenyl radical whose linear or branched alkyl radical comprises 6 to 24 carbon atoms and preferably 8 to 18 carbon atoms,R2 is an alkylene radical comprising 2 to 4 carbon atoms,G is a sugar unit comprising 5 to 6 carbon atoms, t is a value ranging from 0 to 4 and preferably 0 to 2, and v is a value ranging from 1 to 10 and preferably 1 to 4.

[0061] The glucoside bonds between the sugar units are generally of 1-6 or 1-4 type and preferably of 1-4 type. Preferably, the alkylpoly gluco side surfactant is an alkylpoly gluco side surfactant, more preferably the alkylpoly gluco side is Cs to Ci6 alkyl polyglucosides and especially selected from coco glucoside, decyl glucosides, caprylyl / capryl glucosides, or combinations thereof.

[0062] Among the commercial products, mention may be made of the products sold by the company Cognis under the names Plantaren® (600 CS / U, 1200 and 2000) or Plantacare® (818, 1200 and 2000); the products sold by the company SEPPIC under the names Oramix CG 110 and Oramix ® NS 10; the products sold by the company BASF under the name Lutensol GD 70, or else the products sold by the company Chem Y under the name AGIO LK.

[0063] In an embodiment, the non-ionic surfactant present in the composition includes acyl glucamides selected from lauroyl methyl glucamide, myristoyl methyl glucamide, capryloyl methyl glucamide, capryl methyl glucamide, cocoyl methyl glucamide, caproyl methyl glucamide, lauryl methyl glucamide, caprylol / capryol methyl glucamide, oleoyl methyl glucamide oleate, stearoyl methyl glucamide stearate, sunfloweroyl methylglucamide, tocopheryl succinate methyl glucamide, or combinations thereof, preferably lauroyl methyl glucamide, myristoyl methyl glucamide, or a combination thereof.

[0064] In other embodiments the non-ionic surfactant also includes fatty amides, oxy alky lenated glycerol esters, or combinations thereof. In an embodiment, the fatty amide is selected from cocamide MEA (coco monoethanolamide) andcocamide MIPA (coco monoisopropanolamide), cocamide DEA (coco diethanolamide), cocamide DIPA (coco diisopropanolamine), lauramide ME A (lauryl monoethanolamide), lauramide DEA (lauryl diethanolamide), or combinations thereof.

[0065] In one another embodiment, the non-ionic surfactant may also be chosen from oxyalkylenated glycerol esters. The oxy alky lenated glycerol esters are in particular the polyoxyethylenated derivatives of esters of glycerol and of a fatty acid and of their hydrogenated derivatives. These oxyalkylenated glycerol esters can be chosen, for example, from esters of glycerol and of fatty acids which are hydrogenated and oxyethylenated, such as PEG-200 hydrogenated glyceryl palmate, sold under the name Rewoderm LI-S 80 by the company Goldschmidt; oxyethylenated glycerol cocoates, such as PEG-7 glyceryl cocoate, sold under the name Tegosoft GC by the company Goldschmidt, and PEG-30 glyceryl cocoate, sold under the name Rewoderm LI-63 by the company Goldschmidt; and mixtures thereof.

[0066] In an embodiment the non-ionic surfactant is selected from alkyl polyglucoside, acyl glucamides, fatty amides, oxyalkylenated glycerol esters, or combinations thereof.

[0067] In an embodiment, the non-ionic surfactant is in an amount ranging from 1 to 20% by weight, preferably 1.5 to 15% by weight, and more preferably 2 to 10% by weight, relative to the total weight of the composition.Water

[0068] Embodiments herein provide a composition comprising water.

[0069] In an embodiment, water is in an amount ranging from 2 to 55% by weight, preferably from 3 to 52% by weight, and more preferably from 3 to 50% by weight, relative to total weight of the composition.Additives

[0070] The composition, according to embodiments herein, may also include one or more additives, particularly cosmetic additives, which may be notably chosen from a fragrance, humectant, chelating agent, neutralizer, or combinations thereof. Examples of additives include but not limited to selected from niacinamide, salicylic acid, glycerin, menthol, methyl diisopropyl propionamide, menthyl lactate, menthone glycerin acetal, menthyl lactate, ethyl menthane carboxamide, menthoxypropanediol, vitamin E, beta hydroxybutanoic acid, tropic acid, trethocanic acid, panthenol, glycolic acid, mandelic acid, malic acid, tartaric acid, lactobionic acid, gluconic acid or ester thereof, zinc gluconate, zinc sulfate, zinc salt of pyrrolidone carboxylic acid, vitamin B2, vitamin B6, vitamin C, ascorbyl glucoside, ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate, phenoxyethanol, fragrances, sodium benzoate, essential oils, or combinations thereof. It is understood that a person skilled in the art will take care to select the optional additives and / or the amount thereof such that the advantageous properties of the composition used according to the disclosure are not, adversely affected by the envisaged addition. All such embodiments including the optional additives are understood to be included within the scope of the present disclosure.Product

[0071] Embodiment of the present invention provides a product comprising a cosmetic composition as disclosed herein. The product, according to embodiments herein, may more particularly be a cleansing composition for cleansing keratin surfaces, such as the human skin. Preferably, the product, according to embodiments herein, is a composition for cleansing and for removing make-up from a keratin surface.

[0072] In an embodiment, the product is a transparent liquid cleansing composition having rich foam ability.Method and Process

[0073] Embodiments herein include a method of treating keratin surface.

[0074] In an embodiment, the method of treating keratin surface comprises applying the composition of the present invention on the keratin surface to obtain foam and rinsing off the composition.

[0075] The method, according to embodiments herein, comprises applying the composition on a keratin surface preferably with water on the skin, followed by working the composition into a foam and rinsing off the composition. It is possible that the method according to the present disclosure includes leaving the composition on the keratin surface for a certain period of time after being applied onto the keratin surface and before rinsing off to enhance the desired skin benefits.

[0076] The method, according to embodiments herein, include cleansing and removing make-up from a keratin surface.

[0077] Embodiments herein provide a cosmetic process of removing make-up from a keratin surface.

[0078] For the purpose of the present invention, the term “maked-up keratin surface” refers to a keratin surface such as skin applied with any know make-up components. The make-up components include but are not limited to foundation, cream, cosmetic lotion, powder, primer, concealers, blush, highlighters, setting sprays / powders, serum, eyes / lips make-up components, and so on. The keratin surface coated with such make-up components are referred to as maked-up keratin surface.

[0079] In an embodiment, the cosmetic process of removing make-up from a keratin surface such as skin, comprises applying the composition on a maked-up keratin surface, working off the composition, and removing the make-up from the maked-up keratin surface.Use

[0080] Embodiments herein provide use of a composition according to the present invention.

[0081] The composition, according to embodiments herein, may be used for treating and / or cleansing keratin surface, particularly skin.

[0082] In an embodiment, the composition according to the present invention is used for removing make-up from a maked-up keratin surface.

[0083] In an embodiment, the composition according to the present invention is used for providing instant cleansing and make-up removal after first use, and further providing significant soothing to the skin even after sun exposure.

[0084] Accordingly, the composition, in various embodiments herein, may be useful as a face wash, make-up remover, cleansing milk, micellar, or a liquid cleanser.

[0085] Although the subject matter has been described in considerable detail with reference to certain examples and implementations thereof, it is understood that other implementations are possible and included within the scope of the present invention.Examples

[0086] The disclosure will now be illustrated with working examples, which is intended to illustrate the working of disclosure and not intended to take restrictively to imply any limitations on the scope of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice of the disclosed methods and compositions, the exemplary methods, devices, and materials are described herein. It is to be understood that this disclosure is not limited to particular methods, and experimental conditions described, as such methods and conditions may apply.In the following examples, unless indicated otherwise, the percentages are indicated by weight of the total weight of the composition. The percentages are weight percentages by active ingredient, or active material.Example 1The composition Cl (according to the present invention) was prepared by mixing the amino-acid based surfactant viz, 8.34% (w / w) of sodium cocoyl alaninate(30%), 9.00% (w / w) of disodium cocoyl glutamate (and) sodium cocoyl glutamate(25%), amphoteric surfactant viz. 30.00% (w / w) coco-betaine (30%), non-ionic surfactant viz., 2.50% (w / w) of coco-glucoside, 1.50% (w / w) of propylene glycol laurate (100%), pH adjusting agent viz. 0.25% (w / w) citric acid; and quantity sufficient of water (Table 1). Similarly, compositions C2, C3, C4, C5 and C6 were prepared using the components as mentioned in Table 1 below.

[0087] The comparative compositions CPI, CP2 and CP3 were prepared by mixing said components as mentioned in Table 1 below. The composition CPI was devoid of propylene glycol laurate and compositions CP2 and CP3 were prepared by using 0.50% (w / w) and 8% (w / w) of propylene glycol laurate as shown in Table 1 below.Table 1

[0088] Turbidity of the compositions were measured in terms of nephelometric turbidity unit (NTU) and is a measure of turbidity or haziness of a fluid composition, indicating presence, absence and extent of suspended particles in the fluid composition. Lower NTU indicate lesser turbidity and a much clear composition.

[0089] The turbidity of the compositions Cl, C2, C3, C4, C5 and C6 were found 5.37, 3.58, 1.92, 13.90, 3.62 and 5.70, respectively. The turbidity of comparative compositions CPI and CP2 were 2.55 and 11.20, respectively. The comparative composition CP3 was unstable and showed separation of the components.Example 2Make-up removability

[0090] For the purpose of the present disclosure for the make-up removability studies, Frictionmeter (Tribomaster TL-201- Sa Trinity Lab, Inc); and a colorimeter (Spectrophorometer Konica Minolta CM-700d) were used; and the make-up removability studies were carried out on a bioskin (No.10C #WHITE).

[0091] Protocol: (i) Preparation Step: The color of bioskin were measured at 5 spots within the area of 3 cmx3 cm with a portable colorimeter. The values of the color were indicated by “L”, “a”, and “b” where “L” is lightness, and “a” and “b” were color-elements. Then approximately 0.015 g of a liquid foundation was applied evenly in the area of 9 cm2and dried using a hair dryer for 2 minutes to completely dry the surface. As the liquid foundation completely dried, the color in the area of bioskin (maked-up skin) with the dried foundation were measured with the colorimeter. The difference between the color value of the bare bioskin and the color of bioskin with the dried foundation was calculated by as follows (Equation i). Here the AEmax refers to maximum value corresponding to the case where foundation was removed totally compared to bare bioskin.AEmax = (ALi2+Aai2+Abi2) - (i) where ALi = L value for bare bioskin - L value for bioskin+foundationAai = a value for bare bioskin - a value for bioskin+foundationAbi = b value for bare bioskin - b value for bioskin+foundation(ii) Removal step: The foundation removal was studied by the Frictionmeter. The parameters of Frictionmeter were adjusted as 50 mm of distance, 1200mm / min speed and 20 times of repetitions. The prepared(maked-up) bioskin from preparation step was placed and fixed on the base of Frictionmeter. It was placed exactly just below its adaptor. A cotton soaked with 1g of the composition was attached to the adaptor of frictionmeter and was placed horizontally with the bioskin. The distance between them was adjusted and was kept at a position where they would just attach each other. 100g of external weight was placed on the adaptor and the measurement was started. The base of frictionmeter was moved towards left and the bioskin was wiped by cotton towards right due as the adaptor was fixed in its position at 100g of force. Once the frictionmeter was moved on cotton upto a distance of 50mm, the frictionmeter was moved backwards to get back to its original position and accordingly the adaptor was held up while it was returning there. Then, the adaptor was released, to come in contact with the bioskin again and was wiped by the frictionmeter. This process was repeated until the bioskin was wiped for 20 times. Similarly, the rinsing off was carried out with same protocol. The cotton was soaked with 2g of purified water and was attached to the adaptor. Then bioskin was removed, and was dried for 1 minute by using a hair dryer.(iii) Evaluation step: The completely dried bioskin was used for the evaluation step. 5 spots within the area were measured and the % make-up removal (% liquid foundation removal) was calculated as follows (Equation ii).% Make-up removal = ( AEmean / AEmax)* 100 - (ii)AEmean of 5 spots were calculated by the following equation iii.AEmean = (AL22+Aa22+Ab22) - (iii) where AL2= L value for cleansed skin - L value for Bioskin+foundationAa2 = a value for cleansed skin - a value for Bioskin+foundationAbi = b value for cleansed skin - b value for Bioskin+foundation.

[0092] Observations and results: The % make-up removability data obtained for the prepared compositions are depicted in Table 2. As shown in Table 2, the % makeup removability for the compositions Cl, C2, C3, C4, and C6 was > 80% (Score A) and for C570-80% (Score B). The comparative compositions CPI and CP2 showed % make-up removability <70% (Score C). On the other hand, the CP3 composition was unstable and did not show any make-up removal.Table 2

[0093] Above observations and % make-up removability data revealed that the compositions of the present invention was less turbid, worked efficiently for makeup removal and provided skin respect pH.ADVANTAGES OF THE PRESENT DISCLOSURE

[0094] The present disclosure provides a cleansing composition comprising at least one amino-acid based surfactant; propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight, wherein the composition has pH in a range of 4.5 to 6.5. The composition further includes at least one amphoteric and non-ionic surfactant and at least one pH adjusting agent. The composition is a cleansing composition for cleansing keratin surfaces, such as the human skin. Preferably, the composition, is a composition for cleansing keratin surface and for removing makeup. The composition provides instant cleansing and make-up removal after first use, and further provides significant soothing to the skin .

Claims

I / We Claim:

1. A cosmetic composition comprising: at least one amino-acid based surfactant; and propylene glycol laurate in an amount ranging from 1.5 to 6.5% by weight; wherein the composition has pH in a range of 4.5 to 6.5.

2. The composition as claimed in claim 1, wherein the composition comprises at least one pH adjusting agent.

3. The composition according to any of the preceding claims, wherein propylene glycol laurate preferably is in an amount ranging from 1.5 to 6.0% by weight, relative to total weight of the composition.

4. The composition according to any of the preceding claims, wherein the aminoacid based surfactant is in an amount ranging from 1 to 40% by weight, preferably 3 to 40% by weight, and more preferably 4 to 35% by weight, relative to total weight of the composition.

5. The composition according to any of the preceding claims, wherein the pH adjusting agent is in an amount ranging from 0.01 to 10% by weight, preferably 0.1 to 5% by weight, and more preferably 0.1 to 1% by weight, relative to total weight of the composition.

6. The composition according to any of the preceding claims, wherein the aminoacid based surfactant is selected from Formula (A)whereinZ represents a linear or branched alkyl or alkenyl group having 6 to 22 carbon atoms,X is hydrogen or methyl group, n is selected from 0 to 2,Y is selected from hydrogen, -CH3, -CH(CH3)2, -CH2CH(CH3)2, - CH(CH3)CH2CH3, -CH2C6H5, -CH2C2H4OH, -CH2OH, -CH(OH)CH3, - (CH2)4NH2, -(CH2)3NHC(NH)NH2, -CH2C(O)O M+’ -(CH2)2C(O)OH, and - (CH2)2C(O)O M+, and M is a salt-forming cation wherein COO’ is a counteranion.

7. The composition according to any of the preceding claims, wherein the aminoacid based surfactant is preferably selected from sodium cocoyl alaninate, sodium cocoyl glycinate, sodium cocoyl sarcosinate, sodium lauroyl methylaminopropionate, dipotassium capryloyl glutamate, dipotassium undecylenoyl glutamate, disodium capryloyl glutamate, disodium cocoyl glutamate, disodium lauroyl glutamate, disodium stearoyl glutamate, disodium undecylenoyl glutamate, potassium capryloyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate, potassium myristoyl glutamate, potassium stearoyl glutamate, potassium undecylenoyl glutamate, sodium capryloyl glutamate, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium olivoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, sodium undecylenoyl glutamate, potassium lauroyl sarcosinate, potassium cocoyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, ammonium lauroyl sarcosinate, or combinations thereof.

8. The composition according to any of the preceding claims, wherein the pH adjusting agent is selected from citric acid, potassium acetate, potassium hydroxide, sodium carbonate, sodium hydroxide, phosphoric acid, succinic acid, sodium citrate, boric acid, lactic acid, sodium hydrogen carbonate, ethanolamines, or combinations thereof.

9. The composition according to any of the preceding claims, wherein the composition comprises at least one amphoteric surfactant.

10. The composition according to any of the preceding claims, wherein the amphoteric surfactant is selected from (Cs-C2o)alkylbetaines, (Cs-C2o)alkylsulfobetaines, (C8-C2o)alkylamido(C3-C8)alkylbetaines, or (Cs- C2o)alkylamido(C6-C8)alkylsulfobetaines.

11. The composition according to any of the preceding claims, wherein the composition comprises at least one non-ionic surfactant.

12. The composition according to any of the preceding claims, wherein the nonionic surfactant is selected from alkyl polyglucoside, acyl glucamides, fatty amides, oxy alky lenated glycerol esters, or combinations thereof.

13. The composition according to any of the preceding claims, wherein the composition comprises water.

14. The composition according to any of the preceding claims, wherein the composition has both cleansing and make-up removable properties.

15. The composition according to any of the preceding claims, wherein the composition is transparent and has rich foam ability.

16. A method of treating a keratin surface, the method comprising applying the composition according to any of the preceding claims on the keratin surface to obtain foam and rinsing off the composition.

17. A cosmetic process of removing make-up from a keratin surface, the process comprising applying the composition according to any of the preceding claims on a maked-up keratin surface, working off the composition, and removing the make-up from the maked-up keratin surface.

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