WO2025163661A1

WO2025163661A1 - A gel composition for cleansing keratin material and methods thereof

Info

Publication number: WO2025163661A1
Application number: PCT/IN2025/050063
Authority: WO
Inventors: Ritesh Tolani; Ketan Patil
Original assignee: LOreal SA
Current assignee: LOreal SA
Priority date: 2024-02-02
Filing date: 2025-01-21
Publication date: 2025-08-07
Anticipated expiration: 2026-08-02

Abstract

The present disclosure provides a gel composition comprising: a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant, at least two fatty acids and a gelling agent, wherein the anionic surfactant is an amino-acid based surfactant. The present disclosure further provides a cleansing product comprising the gel composition and methods thereof.

Description

A GEL COMPOSITION FOR CLEANSING KERATIN MATERIAL AND METHODS THEREOF

FIELD OF INVENTION

[0001] The present disclosure relates to the field of cosmetics, in particular, a gel composition for cleansing keratin material, preferably skin. The present disclosure also relates to a process of preparing the composition and methods thereof.

BACKGROUND OF INVENTION

[0002] To achieve acne-free and radiant skin, an optimized cleansing contingent is always required. Delicate skin is highly sensitive to harsh soaps and surfactants with a high pH, which are very much prominent in basic cleansing products available in the market. Therefore, usage of such harsh cleansing products deteriorates sensitive and acne-prone skin over time.

[0003] Although the available cleansing product claims their mild behaviour and deep cleansing effect, they are loaded with the component which dries the skin. These components also lead to an unstable composition. Therefore, their storage stability and shelf-life are always a concern. It is difficult to retain their homogeneity throughout.

[0004] The trend now moves towards gel -based cleansing products. However, the pitfail of such products is that they are generally light and, thus do not effectively remove oil, makeup, sun filters, and external aggressors like pollutants, and dust. Also, these products lack sensorial or foamy feel as preferred by consumers in today’s market.

[0005] Therefore, there is a need to develop a cleansing composition with a balanced combination of mild cleansing agents, which deeply purifies the skin without residual drying effects and has the desired product texture and stability.

SUMMARY OF THE INVENTION

[0006] The present disclosure relates to a composition, preferably a cosmetic composition that is stable and unique in comparison to conventional cosmetic composition, as the composition of the present invention comprises a combination of surfactants, fatty acids and a gelling agent. [0007] In an aspect of the present disclosure, there is provided a gel composition comprising: a) a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; b) at least two fatty acids; and c) a gelling agent, wherein the anionic surfactant is an amino acid-based surfactant. [0008] In another aspect of the present disclosure, there is provided a cleansing product, comprising the composition comprising: a) a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; b) at least two fatty acids; and c) a gelling agent, wherein the anionic surfactant is an amino acid-based surfactant.

[0009] In yet another aspect of the present disclosure, there is provided a method of cleansing a keratin material, the method comprising applying the composition comprising: a) a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; b) at least two fatty acids; and c) a gelling agent, wherein the anionic surfactant is an amino acid-based surfactant, on the keratin material to obtain foam and rinsing off the composition.

[0010] In yet one another aspect of the present disclosure, there is provided a method for treating acne on skin, the method comprising applying the composition comprising: a) a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; b) at least two fatty acids; and c) a gelling agent, wherein the anionic surfactant is an amino acid-based surfactant, on the skin.

[0011] 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

[0012] 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

[0013] 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 meanings recognized and known to those of skill in the art, however, for convenience and completeness, particular terms and their meanings are set forth below.

[0014] 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.

[0015] 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”.

[0016] The term "at least one" is used to mean one or more and thus includes individual components as well as mixtures/combinations. Similar definition applies to the term “at least two” used herein.

[0017] 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 element or steps but not the exclusion of any other element or step or group of element or steps.

[0018] The term “including” is used to mean “including but not limited to”, “including” and “including but not limited to” are used interchangeably.

[0019] 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. [0020] The term “auto foam product” is used to mean a product achieved by reducing the gelling agent in the gel composition. The viscosity is reduced by the reduction of the gelling agent and the liquid texture can be achieved. The term "auto foam product" also refers to a product achieved by direct foam application for cleansing through in situ foam generated by pack mechanism in contact with the bulk / juice of the product. Bubble quality generated from auto foam cleanser are typically fine resilient texture like cushion. Auto-foam applicator pack and product can easily produce foam in good quality and relieve/reduce physical stress on the skin during cleansing. Auto-foam products are appreciated for their uniqueness and convenience, the auto-generated foam also helps further cue a mild skin finish.

[0021] 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.

[0022] 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 for convenience 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 about 0.01 % to 20 % should be interpreted to include not only the explicitly recited limits of about 0.01 % to about 20 %, but also to include sub-ranges, such as 0.01% to 10 %, 11 % to 20%, and so forth, as well as individual amounts, including fractional amounts, within the specified ranges, such as 2.84 %, and 3.2 %, for example.

[0023] 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.

[0024] 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.

[0025] The present disclosure relates to a gel composition, preferably a cleansing composition. The disclosed embodiments of the present disclosure include a gel-based cleansing composition, a personal care product comprising the composition and a method for treating keratin surface, such as skin. The various embodiments herein disclose a cleansing composition, particularly a transparent serum-like or gel cleansing composition comprising a combination of surfactants, fatty acids, and a gelling agent. The embodiments of the present disclosure provide a mild cleansing composition of low pH, without any residual drying effect. The composition is suitable for all types of skin, foamable, stable, and transparent over a broader ambit of time and temperatures. In general, the majority of the cleansing compositions available in the market are harsh, impart dryness to the skin, suffer from stability issues at higher temperatures, and are not transparent enough. When such compositions are converted to a gel-based composition, the sensorial, foamability, and textural requirements of the consumers are compromised. Hence it has become the need of the hour to provide a multifunctional cosmetic cleansing composition which provides improved sensorial and aesthetic properties on single and repeated usage, and at the same time, should be mild, transparent, and foamable providing anti-acne property along with no residual drying effect to skin. Accordingly, the present disclosure provides a gel composition balancing both sensorial and transparency properties, with a unique combination of specific fatty acids and surfactants.

Composition

[0026] The embodiments herein provide a gel-based composition for cleansing and treating a keratin surface. The composition is a high foaming, with improved foam profile (micro bubbles), with rich and stable foam, with no residual dryness, balanced hydration, mild and easily rinses off the keratin surface. It can also give acne control, even skin tone, reduction of acne marks, skin glow and radiance. Moreover, the texture of the composition according to embodiments herein, is gel-like providing easy spread, an auto foam product, with optimum foam, suitable for use with a minimum of water. The composition according to embodiments herein is mild, transparent, dense, and stable even at higher temperatures for a longer period of time.

[0027] Particularly, there is provided a gel composition comprising: a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; at least two fatty acids; and a gelling agent, wherein the anionic surfactant is an amino acid-based surfactant. In other embodiments, the composition further includes at least one additive selected from a polymer, a pH adjuster, a solvent, a preservative, a fragrance, a cosmetic active, a colorant, or mixtures thereof.

Anionic surfactant

[0028] The composition, according to embodiments herein, includes at least one anionic surfactant comprising amino acid surfactant. The term "anionic surfactant" refers to a surfactant comprising, as ionic or ionizable groups, only anionic groups. The surfactants are termed "anionic" when it 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 disclosure (for example the medium or the pH) and does not comprise any cationic charge. [0029] In another embodiment the anionic surfactant is selected from amino acid surfactant of formula (A): wherein

Z represents a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms,

X is hydrogen or methyl group, n is 0 or 1,

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 counter-anion.

[0030] Examples of amino acid surfactants include but not limited to salts of alanine, arginine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, phenylalanine, serine, tyrosine, valine, sarcosine, and any mixture thereof. Preferably the amino acid surfactants include glutamates, sarcosinates, or combinations thereof.

[0031] More specifically, the amino acid surfactant is selected from sodium lauroyl sarcosinate, 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 myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, ammonium lauroyl sarcosinate, or combinations thereof.

[0032] References can be made to the commercially available amino acid 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.

[0033] In a preferred embodiment, the amino acid surfactant is selected from disodium cocoyl glutamate, disodium lauroyl glutamate, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium cocoyl sarcosinate, sodium lauroyl sarcosinate, or combinations thereof.

Non-ionic surfactant

[0034] The composition, according to embodiments herein, provides a composition comprising at least one non-ionic surfactant. In an embodiment, the non-ionic surfactant is selected from alkyl polyglycoside, acyl glucamides, fatty amides, oxyalkylenated glycerol esters, or combinations thereof.

[0035] The non-ionic surfactant includes an alkyl polyglycoside of formula (I):

RiO-(R₂O)t -(G)_v (I) 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.

[0036] The glucoside bonds between the sugar units are generally of 1-6 or 1-4 type and preferably of 1-4 type. Preferably, the alkylpolyglycoside surfactant is an alkylpolyglucoside surfactant, more preferably the alkylpoly gluco side is Cs/Ci6 alkyl polyglycosides and especially selected from decyl glucosides, caprylyl/capryl glucosides, or combinations thereof. [0037] 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.

[0038] In an embodiment, the non-ionic surfactant present in the composition includes acyl glucamides selected from lauroyl/myristoyl methyl glucamide, capryloyl/capryl methyl glucamide, lauroyl methyl glucamide, myristoyl methyl glucamide, capryloyl methyl glucamide, capryl methyl glucamide, cocoyl methyl glucamide, capryloyl/caproyl methyl glucamide, cocoyl methyl glucamide, lauryl methylglucamide, oleoyl methylglucamide oleate, stearoyl methylglucamide stearate, sunfloweroyl methylglucamide, tocopheryl succinate methylglucamide, or combinations thereof. Preferably the acyl glucamide is lauroyl/myristoyl methyl glucamide, commercially available as Glucotain Flex.

[0039] In other embodiments, the non-ionic surfactant also includes fatty amides, oxyalkylenated glycerol esters, or combinations thereof. In an embodiment, the fatty amide is selected from cocamide MEA (coco monoethanolamide) and cocamide MIPA (coco monoisopropanolamide), cocamide DEA (coco diethanolamide), cocamide DIPA (coco diisopropanolamine), lauramide MEA (lauryl monoethanolamide), lauramide DEA (lauryl diethanolamide), or combinations thereof.

[0040] In one another embodiment, the non-ionic surfactant may also be chosen from oxyalkylenated glycerol esters. The oxyalkylenated glycerol esters are in particular the polyoxyethylenated derivatives of esters of glycerol and of a fatty acid and 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.

Amphoteric surfactant

[0041] The composition, according to embodiments herein, comprises at least one amphoteric surfactant(s).

[0042] 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) [0043] The amphoteric surfactant(s) used in the composition according to an embodiment herein may be optionally quaternized amine derivatives containing at least one anionic group, for instance, a carboxylate, sulfonate, sulfate, phosphate or phosphonate 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. According to an embodiment of the present disclosure, the amphoteric surfactant is selected from (Cs-C2o)alkylbetaines, sulfobetaines, (Cs- C2oalkyl)amido(C2-Csalkyl) hydroxy sulfobetaines,, (C8-C2oalkyl)amido(C2-Csalkyl)betaine, (C8-C2oalkyl)amido(C2-C8alkyl)sulfobetaine, (Cs-Cu acyl) amphoacetates, (Cs- Ci4acyl)amphoglycinates, or combinations thereof, preferably selected from (Cs- C2o)alkylbetaines, (C8-C2oalkyl)amido(C2-C8alkyl) hydroxy sulfobetaines, (Cs- C2oalkyl)amido(C2-Csalkyl) sulfobetaines, or combinations thereof.

[0044] In an embodiment (Cs-C2o)alkylbetaines is selected from behenylbetaine, 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.

[0045] 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:

R_a represents 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-hydroxyethyl group, R_c represents 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,

R_a' represents 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.

[0046] In particular, according to an embodiment, the amphoteric surfactants may be of betaine-based amphoteric surfactant, for example, (Cs-C2o)alkylbetaines, sulfobetaines, (Cs- C2oalkyl)amido(C2-Csalkyl) hydroxy sulfobetaines, (C8-C2oalkyl)amido(C2-Csalkyl)betaines and (C8-C2oalkyl)amido(C2-Csalkyl)sulfobetaines. Preferably, the amphoteric surfactants are chosen from (Cs-C2o)alkylbetaines, (C8-C2oalkyl)amido(C2-C8alkyl) hydroxy sulfobetaines, (C8-C2o)alkylamido(C2-Cs)alkylbetaines, or combinations thereof. Preferably, the amphoteric surfactant is chosen from cocamidopropyl hydroxysultaine (CAHS), cocamidopropyl betaine (CAPB), cocoylbetaine, or combinations thereof.

[0047] In another embodiment, the total weight of the surfactants is in a range of 0.01 to 20% (w/w), preferably 1 to 15% (w/w), more preferably 1 to 10% (w/w), furthermore preferably 1 to 5% (w/w), with respect to total weight of the composition.

Fatty acid

[0048] The composition, according to embodiments herein, includes at least two C6-C40 fatty acid, which upon saponification result in soaps and provide oil free composition with cleansing properties and thereby aids in the removal of dirt, grease, sebum from clogged pores of the skin. A single type of C6-C40 fatty acid, or two or more different types of C6-C40 fatty acids may be used in combination. The fatty acids may be linear or branched, saturated or unsaturated, cyclic, or acyclic.

[0049] The fatty acid may be chosen in particular from C10-C30 fatty acids, and in particular from lauric acid, myristic acid, stearic acid, palmitic acid, or mixtures thereof. Preferably the fatty acid is a combination of lauric acid, myristic acid, stearic acid, and palmitic acid.

[0050] The amount of C10-C30 fatty acids in the composition, according to embodiments herein, may vary. The total amount of the C10-C30 fatty acids, according to embodiments herein, are present in the composition in a weight range of 0.01 to 20% (w/w), preferably 1 to 15% (w/w), more preferably 5 to 15% (w/w), furthermore preferably 8 to 12% (w/w), with respect to total weight of the composition.

Gelling agent

[0051] The composition, according to embodiments herein, includes a gelling agent selected from hydroxyalkyl cellulose, inulins, celluloses, gums, xyloses, cellobiose, maltodextrin, scleroglucan, chitosan, ulvan, fucoidan, alginate, pectin, heparin, or combinations thereof, preferably from hydroxyalkyl celluloses, and more preferably is hydroxy propyl methyl cellulose.

[0052] In another embodiment, the gelling agent is in a weight range of 0.01 to 10% (w/w), preferably 0.5 to 5% (w/w), more preferably 0.5 to 3% (w/w), with respect to total weight of the composition.

Active agent

[0053] The composition, according to embodiments herein, may include at least one active agent selected from a cooling agent, an anti-oxidant, a skin care agent, an exfoliating active, or combinations thereof. The active agent is chosen in a such way as to provide enhanced cosmetic effects such as cooling effect, anti-exfoliating, anti-microbial, soft peeling, anti-oxidating, skin-care, skin repair, sebum control, anti-acne, and so on. The composition, according to embodiments herein, is suitable for solubilization of at least one active agent, in particular for solubilization of hydrophobic active agents, yet provides a clear transparent composition.

[0054] The composition, according to embodiments herein, comprises one or more active agent 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, citric 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 or combinations thereof, preferably selected from niacinamide, salicylic acid, glycerin, menthol, ascorbyl glucoside phenoxyethanol, fragrances, citric acid, sodium benzoate, or combinations thereof, and more preferably selected from niacinamide, salicylic acid, or combinations thereof. [0055] In another embodiment, the total amount of the active agent is in a weight range of 1 to 20 % (w/w), preferably 2 to 10 % (w/w), more preferably 3 to 9 % (w/w), with respect to total weight of the composition.

Additives

[0056] 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 sorbitol, mannitol, xylitol, maltitol, maltitol syrup, lactitol, erythritol, isomalt, glycerin, propylene glycol, tetrasodium glutamate diacetate, ethylene diamine tetraacetic acid, essential oils, sodium chloride and so on. 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.

Polymer

[0057] The composition, according to embodiments herein, includes one or more polymers. Polymers as part of the composition provide a smoothening effect to the skin.

[0058] The amount of polymer in the composition, according to embodiments herein, may vary. The polymer, according to embodiments herein, may be present in the composition in an amount ranging from 0.01 to 5% by weight relative to the total weight of the composition, preferably from 0.05 to 4 wt %, more preferably from 0.1 to 4 wt %. pH adjuster

[0059] The composition, according to embodiments herein, may include one or more pH adjusters. pH adjusters as part of the composition maintain the pH in the range of 7.5 to 9.0, preferably in a range of 8.0 to 8.8. Examples of pH adjusters include but not limited to ammonium hydroxide, alkali metal carbonates, alkali metal hydroxides such as sodium or potassium hydroxide, alkanolamines such as mono-, di- and triethanolamines and also their derivatives.

[0060] According to preferred embodiments herein, the pH adjuster is selected from potassium hydroxide, sodium hydroxide, triethanolamine, or mixtures thereof. [0061] According to more preferred embodiments herein, the pH adjuster is potassium hydroxide.

[0062] The amount of pH adjuster in the composition, according to embodiments herein, may vary. The pH adjuster, according to embodiments herein, may be present in the composition in an amount ranging from 1.0 to 6.0 % by weight, preferably from 1.0 to 5.0 %, more preferably 1.5 to 4.0 %, furthermore preferably 2.0 to 3.5 % by weight relative to the total weight of the composition.

Solvent

[0063] The composition according to an embodiment of the present invention, may advantageously comprise at least one solvent, including water and/or organic medium/solvent. The composition according to the invention may also comprise one or more organic medium/solvents, preferably water-soluble organic medium/solvents (solubility of greater than or equal to 5% in water at 25°C and at atmospheric pressure).

[0064] Examples of the organic medium/solvents that may be mentioned include linear or branched, and preferably saturated, monoalcohols or diols, comprising 2 to 10 carbon atoms, such as ethanol, (iso)propanol, butanol, hexylene glycol (2-methyl-2,4-pentanediol), neopentyl glycol and 3 -methyl- 1,5 -pentanediol, butylene glycol, dipropylene glycol and propylene glycol; aromatic alcohols such as phenylethyl alcohol; polyols containing more than two hydroxyl functions, in particular C3-C6 polyols, such as glycerol; polyol ethers, for instance ethylene glycol monomethyl, monoethyl and monobutyl ether, propylene glycol or ethers thereof, for instance propylene glycol monomethyl ether; and also diethylene glycol alkyl ethers, especially C1-C4 alkyl ethers, for instance diethylene glycol monoethyl ether or monobutyl ether, alone or as a mixture.

Water

[0065] The composition, according to embodiments herein, includes water in a weight range of 10 to 90 wt %, preferably 20 to 80 wt %, more preferably 60 to 85 wt%, most preferably 70 to 80 wt % by weight with respect to total weight of the composition.

Preservative [0066] The composition, according to embodiments herein, may include one or more preservatives, which are used to protect the composition from microbial contamination and/or any associated degradation of the composition.

[0067] Examples of preservatives include but not limited to phenoxy ethanol, caprylyl glycol, parabens, methyl isothiazolinone, benzisothiazolinone, methyl chloro isothiazolinone, benzyl alcohol, salicylic acid, sorbic acid, sodium benzoate, potassium sorbate, or mixtures thereof.

[0068] According to a preferred embodiment, the preservative is phenoxy ethanol and caprylyl glycol.

[0069] The amount of preservative in the composition, according to embodiments herein, may vary. The preservative, according to embodiments herein, may be present in the composition in an amount ranging from 0.1 to 2% by weight relative to the total weight of the composition, preferably from 0.3 to 1.5 wt %, more preferably from 0.3 to 1 wt %, relative to the total weight of the composition.

Fragrance

[0070] The composition, according to embodiments herein, includes one or more fragrances, which is used to impart a pleasant flavor to the composition and masks any undesirable odour that may arise from the other ingredients of the composition. Further, fragrances impart a pleasant sensory perception to the user while using the composition.

[0071] According to a preferred embodiment, the fragrance is a mixture of essential oils.

[0072] The amount of fragrance in the composition, according to embodiments herein, may vary. The fragrance, according to embodiments herein, may be present in the composition in an amount ranging from 0.4 to 1.0 %, preferably from 0.5 to 0.9 wt % , more preferably from 0.6 to 0.9% by weight relative to the total weight of the composition.

Product

[0073] One embodiment of the present disclosure relates to a product preferably a cleansing product comprising the composition as disclosed herein. In another embodiment the product is a transparent gel with viscosity in a range of 20 to 40 UD at M3 spindle.

Form

[0074] It is preferable that the composition according to the present disclosure be in the form of gel at 25°C and under atmospheric pressure (760 mmHg). [0075] The composition according to the present disclosure may be a cleansing composition. Thus, the cleansing composition according to the present disclosure may be intended for application onto a keratin surface.

[0076] The term “keratin surface” or “keratin material” herein refers to the most-surface level portion of the human epidermis containing keratin as a main constituent element, and examples thereof include the skin, scalp, nails, lips, hair, and the like. Thus, it is preferable that the cleansing composition according to the present disclosure be used for a cosmetic process for the keratin surface, in particular the skin.

[0077] The composition according to the present disclosure may preferably be a rinse-off composition. The rinse-off composition can be removed from a keratin surface such as skin, preferably with water.

[0078] The composition according to the present disclosure may preferably be a foamable cleansing composition. The foamable cleansing composition can remove dirt, sebum and/or makeup on a keratin surface such as skin from the keratin surface.

Use and method

[0079] One embodiment of the present disclosure relates to a method of cleansing a keratin material, preferably skin, the method comprising applying the composition on the keratin material to obtain foam and rinsing off the composition. In another embodiment a method for treating acne on the skin, the method comprising applying the composition on the skin

[0080] A composition, according to embodiments herein, may more particularly be a composition for cleansing keratin surfaces, such as the human skin. Preferably, the composition, according to embodiments herein, is a composition for cleansing and brightening the skin. Accordingly, the composition, in various embodiments herein, may be a face wash, a cleansing serum, make up remover, cleansing milk, facial cleansing scrubs, facial clay masks, skin cleansing balms, micellar, or a liquid cleanser. In a preferable embodiment, the composition is a liquid cleanser. The composition, according to embodiments herein, can be applied preferably with water on the skin, followed by working the composition into a foam and rinsing off the composition.

[0081] It is possible that the composition according to the present disclosure be left on the keratin surface for a certain period of time such as some minutes after being applied onto the keratin surface and before rinsing off to enhance the desired skin benefits. Examples

[0082] 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.

[0083] 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 1

Cleansing compositions

[0084] Gel based Cleansing composition C(l) and the comparative compositions CP(1) to CP(5) were prepared with the set of ingredients in their corresponding weight % as indicated in Table 1.

[0085] The process involved blending of the components as given in Table 1 followed by continuous stirring resulting in a transparent gel composition.

Composition Cl - Composition Cl (according to the invention) was prepared by blending a combination of surfactants (1.55 wt% of sodium lauroyl sarcosinate (anionic surfactant), 1.00 wt% of cocamidopropyl hydroxysultaine, 0.30 wt% coco-betaine (amphoteric surfactants), and 1.06 wt% of decyl glucoside (non-ionic surfactant)) and combination of fatty acids (6.00 wt% of lauric acid, 3.01 wt% of myristic acid, 0.59 wt% of palmitic acid, and 0.11 wt% of stearic acid ) along with a gelling agent (hydroxy propyl methyl cellulose). The composition includes other active agents and additives as defined in Table 1 below.

In particular, the composition Cl was prepared by adding a gelling agent (hydroxy propyl methyl cellulose) in water at 75°C allowing the gelling agent to swell, followed by the addition of melted fatty acids (6.00 wt% of lauric acid, 3.01 wt% of myristic acid, 0.59 wt% of palmitic acid, and 0.11 wt% of stearic acid). To this, potassium hydroxide was added at 75°C under vacuum for neutralization of the acids. Further, salicylic acid, chelating agent (Tetrasodium Glutamate Diacetate) and glycerin were added, and the mixture was allowed to cool. When the mixture was cooled to 50°C, the surfactants ((1.55 wt% of sodium lauroyl sarcosinate (anionic surfactant), 1.00 wt% of cocamidopropyl hydroxysultaine, 0.30 wt% coco-betaine (amphoteric surfactants), and 1.06 wt% of decyl glucoside (non-ionic surfactant)) were added and when the temperature dropped to 40°C, the preservative was added. Niacinamide was then added at 30°C. The emulsion was cooled and discharged.

[0086] Similarly, the comparative compositions CP(1) to CP(6) were prepared with the set of ingredients in their corresponding weight % as indicated in Table 1 below (includes variation in the components as compared to the composition Cl).

Table 1

Example 2

Preliminary Observation

[0087] The compositions as prepared in Example 1 were analyzed to determine its prototype scoping. The composition Cl showed a unique transparent foam like soap wash. It showed the formation of fast foam with high foam density. It had mild and deep cleansing sensory behaviour for acne and brightening of skin, without making skin dry and tight. The face wash comprising the composition Cl gently purified acne skin and back without drying the skin. Thus, it was observed that the gel composition of the instant Application is suitable for all types of skin, foamable, stable, and transparent.

[0088] The composition CP(1) wherein the only fatty acid included was lauric acid, appeared as thick creamy and thus the requirement of the transparent gel wash was not met. The composition CP(2), wherein no fatty acid was included, resulted in, non-transparent and nongel watery liquid. The composition CP(3), wherein the amino-acid based surfactant was not included, resulted in loose foam with a longer settling time. The composition CP(4), wherein the gelling agent was absent, the composition remained in non-gel state. Composition CP(5), wherein the non-ionic surfactant was absent, gave non-transparent and non-gel product and the composition CP(6) wherein the active agent such as niacinamide was absent, resulted in formulation out of pH and exfoliation. Similarly, the absence of other components, such as salicylic acid disturbed the pH causing skin irritantion.

[0089] From the above, it was observed that the composition Cl prepared according to the present disclosure exhibited desired pH, stability, exfoliation property, foaming characteristics, sensorial aspects which could be attributed to the presence of essential ingredients, such as combination of fatty acids and combination of surfactants along with gelling agent in desired weight percentages.

Example 3

Temperature stability

Protocol

[0090] The composition Cl as prepared in Example 1 was analyzed to determine its stability when stored at varying temperatures. Experimental

[0091] The composition Cl was stored in a transparent bottle at 4°C, 25°C, 37°C and 45°C, for over a period of two months (2M).

Observations

[0092] It was found that the composition Cl was stable and transparent at 25°C and 45°C. However, the sample exposed to 4°C showed turbidity /precipitation. At room temperature (37°C), the composition remained transparent and colourless gel.

Results

[0093] The composition Cl showed 2M stability at all conditions 4°C, 25°C, 37°C and 45°C. This stability could be extrapolated to 3 years and thus, the composition Cl was found to have a longer shelf-life.

Example 4

Shine control

[0094] Shine control effect provided by the compositions Cl, CP(1) and CP(2) were assessed using an instrumental test.

[0095] 17 healthy human volunteers with oily skin were recruited for the instrumental test to assess shine control effects. Skin gloss shine measurements were made using Lightcam before and after product application, in controlled conditions.

Protocol

[0096] Cleansing products tested: 500mg/half face of compositions Cl, CP(1), and CP(2) along with commercial skin brightening and, cleansing product (commercial product).

Lightcam measurement:

1 ) The volunteers were instructed to wash their face with water and leave for acclimatization in standard conditions (Temperature :21±1 °C; RH: 45±5%) for 30 mins.

2) T-0 baseline measurement was obtained on Lightcam; with cheek and forehead as the zone of assessment.

3) Product was applied as per randomization using a standard protocol.

4) Volunteers were instructed to wait in standard condition for 10 min for the product to settle. 5 ) T-imm measurement was obtained on Lightcam.

6) The volunteers were instructed to wait in standard conditions for next 4 hrs and subsequent measurements such as T-30 min, T-lhour, and T-2hour were carried out.

Results

[0097] The reduction in gloss shine value from TO base line measurement and respective time point post application of the product is represented as a A value. The A values obtained for C(l), CP(1), CP(2), and the commercial product are summarized in Table 2.

Table 2

[0098] The cleansing compositions according to the present disclosure, namely Cl exhibited superior gloss shine effects as illustrated by its A value -4.90, -4.54 and -3.73, at T-30 min, T- Ihr, T-2hr and T-4hr respectively. Further, it was found that the composition Cl exhibited long-lasting shine effects compared to CP(1), CP(2), and commercial product.

Example 5

Deep pore cleansing ability

[0099] To understand the performance of deep pore cleansing ability of the composition Cl, deep pore cleansing ability test was done.

[0100] Protocol : Deep Pore Cleansing, an in vitro test was conducted using Dermascore Plus instrument lab. The % deep pore cleansing efficacy delivered by the composition was understood using in-vitro substrate assessment. Bioskins (no 10A) were employed and 6 replicates were taken per test samples. On each bioskin, 1.56 pg/cm² sebollution was applied on 2.2 cm diameter circle study site on larger pore side of bioskin using finger coat in circular motion and kept for 10 min for drying. The samples were then washed with pre-treatment cleanser (2pg/cm², Water: product = 2:1), 10 circles and were rinsed under running water (flow rate fixed) for 10 sec and dabbed dry with Kim towels (5 times). Then baseline (TO) readings were taken using Dermascore instrument. The 6 bioskin samples were treated with Cl (7.59 pg Cl : 15.9 pg water), 30 circles and rinse under running water (flow rate fixed) for 30 sec and dabbed dry with Kim towels (5 times). Finally, post treatment readings (Tl) were taken using Dermascore instrument. All images were analysed using Dermascore Pilot Software and Number of particles (Single) data was used to calculate % removability /deep pore cleansability.

[0101] The results confirmed that the composition Cl exhibited 97.43% deep pore cleansability.

Consumer panel study

[0102] For understanding of acne issues, a panel study was conducted with men of 18-35 year old having combination to oily skin type. Consumers had self-claimed skin concerns of light to medium severity. Results revealed that use of the composition Cl of the present disclosure was highly appreciated for mild cool sensation with soothing efficacy cue. The composition was much preferred for skin finish among users on acne prone skin. The composition of the present disclosure favoured smooth hydrated skin finish with slightly firmed sensation and hence was considered acne efficacy by consumers.

ADVANTAGES OF THE PRESENT DISCLOSURE

[0103] The present disclosure provides a gel-based cleansing transparent composition comprising a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant, at least two fatty acids and a gelling agent, wherein the anionic surfactant is an amino-acid based surfactant. The composition comprises optimized weight ratios of said surfactants which enables complete solubilization of a wide range of actives. Further, the composition comprising the optimized level of actives along with the additives, offers multiple skin benefits. The composition is transparent, of desirable gel serum like texture for easy spreading, with optimized pH and desired foamability. The composition is transparent and stable at higher temperatures for a longer period of time, hence exhibits enhanced storage stability and shelf-life. The composition is mild and suitable for all skin types and prevents acne. The composition treats acne as well as reduces acne marks. The composition provides instant and long-lasting hydration and ensures a smooth and even skin tone over its persistent use. The composition of the present disclosure is a gel cleanser for sensitive skin with light texture and high derm caring agents for mild yet deep cleansing sensory for acne and brightening benefits from first use with clean feel sensory.

Claims

I/We Claim:

1. A gel compositi on compri sing : a. a combination of surfactants selected from anionic surfactant, non-ionic surfactant, or amphoteric surfactant; b. at least two fatty acids; and c. a gelling agent, wherein the anionic surfactant is an amino-acid based surfactant.

2. The composition as claimed in claim 1, wherein the amino-acid based surfactant is selected from sodium lauroyl sarcosinate, 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 myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, ammonium lauroyl sarcosinate, or combinations thereof.

3. The composition as claimed in claim 1, wherein the amphoteric surfactant is selected from (Cs-C2o)alkylbetaines, sulfobetaines, (Cs-C2oalkyl)amido(C2-Csalkyl)hydroxy sulfobetaines, (Cs-C2oalkyl)amido(C2-Csalkyl)betaines, (Cs-C2oalkyl)amido(C2- Csalkyl)sulfobetaines, (Cx-Cuacyl) amphoacetates, (Cs-Cu acyl)amphoglycinates, or combinations thereof, preferably selected from (Cs-C2o)alkylbetaines, (Cs- C2oalkyl)amido(C2-Csalkyl) hydroxy sulfobetaines, (Cs-C2oalkyl)amido(C2- Csalkyl)sulfobetaines, or combinations thereof.

4. The composition as claimed in claim 1, wherein the non-ionic surfactant is selected from alkyl polyglycoside, acyl glucamides, fatty amides, oxyalkylenated glycerol esters, or combinations thereof.

5. The composition as claimed in claim 4, wherein the alkyl polyglycoside is of formula (I):

RiO-(R₂O)_t-(G)v (I) 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,

6. The composition as claimed in claim 5, wherein the acyl glucamide is selected from lauroyl methyl glucamide, myristoyl methyl glucamide, capryloyl methyl glucamide, capryl methyl glucamide, cocoyl methyl glucamide, caproyl methyl glucamide, lauryl methylglucamide, oleoyl methylglucamide oleate, stearoyl methylglucamide stearate, sunfloweroyl methylglucamide, tocopheryl succinate methylglucamide, or combinations thereof.

7. The composition as claimed in claim 1, wherein the surfactants are in a weight range of 0.01 to 20% (w/w), preferably 1 to 15% (w/w), with respect to total weight of the composition.

8. The composition as claimed in claim 1, wherein the fatty acids are selected from carboxylic acids comprising 6 to 40 carbon atoms, preferably from carboxylic acids comprising 10 to 30 carbon atoms, more preferably from lauric acid, myristic acid, stearic acid, palmitic acid, or combinations thereof.

9. The composition as claimed in claim 1, wherein the fatty acids are in a weight range of 0.01 to 20% (w/w), preferably 1 to 15% (w/w), with respect to total weight of the composition.

10. The composition as claimed in claim 1, wherein the gelling agent is selected from hydroxyalkyl cellulose, inulins, celluloses, gums, xyloses, cellobiose, maltodextrin, scleroglucan, chitosan, ulvan, fucoidan, alginate, pectin, heparin, or combinations thereof, preferably from hydroxyalkyl celluloses, and more preferably is hydroxy propyl methyl cellulose.

11. The composition as claimed in claim 1, wherein the gelling agent is in a weight range of 0.01 to 10% (w/w), preferably 0.5 to 5% (w/w), with respect to total weight of the composition.

12. The composition as claimed in claim 1, wherein the composition comprises at least one active agent 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, citric 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 or combinations thereof, preferably selected from niacinamide, salicylic acid, glycerin, menthol, ascorbyl glucoside phenoxyethanol, fragrances, citric acid, sodium benzoate, or combinations thereof, and more preferably selected from niacinamide, salicylic acid, or combinations thereof .

13. The composition as claimed in claim 12, wherein the active agent is in a weight range of 1 to 20 % (w/w), preferably 5 to 10 % (w/w), with respect to total weight of the composition.

14. The composition as claimed in claim 1, wherein the composition comprises water in a weight range of 10 to 90% (w/w), preferably 20 to 80% (w/w), with respect to total weight of the composition.

15. The composition as claimed in claim 1, wherein the composition has pH in a range of 7.5 to 9.0, preferably in a range of 8.0 to 8.8.

16. A cleansing product comprising the composition as claimed in claim 1.

17. A method of cleansing a keratin material, preferably skin, the method comprising applying the composition as claimed in claim 1 on the keratin material to obtain foam and rinsing off the composition.

18. A method for treating acne on skin, the method comprising applying the composition as claimed in claim 1 on the skin.