Rinse-free cleansing composition

Abstract

Disclosed is a rinse-free cleansing composition. The cleansing composition comprises a solute part in an amount ranging 1.13% w / w to 12.25% w / w with respect to a total weight of the rinse-free cleansing composition. Herein, the solute part comprises, a surfactant composition in an amount ranging 0.02% w / w to 1.2% w / w with respect to the total weight of the rinse-free cleansing composition, at least one humectant, at least one buffer agent, a preservative composition, and triethyl citrate; and a solvent part in amount ranging 87.75% w / w to 98.87% w / w with respect to the total weight of the rinse-free cleansing composition.

Description

[0001] 177465 / 01 1

[0002] RINSE-FREE CLEANSING COMPOSITION

[0003] TECHNICAL FIELD

[0004] This invention relates to a formulation. In particular, though not exclusively, this invention relates to a rinse-free cleansing composition.

[0005] BACKGROUND

[0006] Personal care encompasses a wide range of products, from those designed to be rinsed off (soaps, shampoos) to those meant to remain on the skin or hair (moisturizers, sunscreens). While constant improvement is sought in both cleansing efficacy and product retention, a crucial element remains: minimizing the amount of material left behind while maximizing its effectiveness and safety.

[0007] Conventional cleansing routines often require rinsing with water, a step that can be inconvenient and environmentally taxing, especially when water access is limited. The sheer volume of water used during rinsing raises concerns, leading to the development of rinse-free cleansing compositions which offer convenience and the potential for significant water conservation.

[0008] However, existing rinse-free cleansing compositions may suffer from drawbacks. Some formulations might leave a significant residue on the skin, causing a sticky or uncomfortable feeling such as, formulations with high surfactant levels (above 1% and reaching 5%) can leave an unpleasant sticky feeling on the skin. Others may lack sufficient cleansing power to effectively remove dirt and grime. Several attempts have been made to solve the aforementioned problem such as, adding low levels of oil-absorbing materials like clays, starches, or cellulose-based absorbents, or incorporating ethanol. While such solutions can potentially address the stickiness issue, other drawbacks still persist.

[0009] Therefore, in light of the foregoing discussion, there exists a need to overcome the aforementioned drawbacks related with conventional cleansing compositions and provide a novel rinse-free cleansing composition that offers effective cleansing without the need for water rinsing while maintaining a comfortable after-feel on the skin and remaining environmentally responsible.

[0010] It has now been established that the afore-mentioned problems are solved by the rinse-free cleansing composition according to claim 1. In particular, the present inventor established that the use of a combination of triethyl citrate and a low amount (e.g. <1.2% w / w with respect to the total weight of the rinse-free cleansing composition, preferably <0.6% w / w) of a surfactant composition within the rinse-free cleansing composition unexpectedly improves the skin feel (reduced tackiness) of the rinse-free cleansing composition. Without wishing to be bound by theory, it is believed that the triethyl citrate and surfactant composition act synergistically to reduce the amount of residue remaining after application of the rinse-free cleansing composition to the body.

[0011] SUMMARY OF THE INVENTION

[0012] A first aspect of the invention provides a rinse-free cleansing composition, comprising: a solute part in an amount ranging 1.13% w / w to 12.25% w / w with respect to a total weight of the rinse-free cleansing composition, wherein the solute part comprises: a surfactant composition in an amount ranging 0.02% w / w to 1.2% w / w with respect to the total weight of the rinse-free cleansing composition, at least one humectant, at least one buffer agent, a preservative composition, and triethyl citrate; and an aqueous solvent part in an amount ranging 87.75% w / w to 98.87% w / w with respect to the total weight of the rinse-free cleansing composition.

[0013] In a preferred embodiment, the rinse-free cleansing composition comprises triethyl citrate in an amount of 0.1% w / w to 6.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably in an amount of 0.1% w / w to 2.5% w / w, more preferably 0.1% w / w to 1.5% w / w, most preferably 0.1% w / w to 1.0% w / w, especially 0.1% w / w to 0.5% w / w, with respect to the total weight of the rinse-free cleansing composition.

[0014] In a second aspect, the present invention provides a dispensing unit, such as a spray or self-foamer, containing the rinse-free cleansing composition according to the first aspect.

[0015] In a third aspect, the present invention provides the use of the rinse-free cleansing composition of the first aspect to remove contaminants, such as dirt and grime, from a surface such as the skin or hair of a subject.

[0016] The present disclosure provides a rinse-free cleansing composition. The term "rinse-free cleansing composition" as used herein refers to a formulation of multiple elements (or components) configured to remove contaminants (such as, dirt, grime, etc.) from a given surface without the need for rinsing with water. Alternatively stated, the rinse-free cleansing composition (or simply referred to as, cleansing composition) may be defined as a self-foaming surfactant (or cleansing) system that doesn't require rinse off (or excess water usage) unlike other conventional all body cleansers. The cleansing composition is configured to provide effective cleaning without the need for rinsing, while prioritizing comfortable after-feel and environmental responsibility by eliminating the rinsing step in order to minimize water consumption and associated energy use, resulting in a smaller carbon footprint. Moreover, the cleansing composition may be a biodegradable composition to further promote environmental friendliness. Furthermore, the cleansing composition effectively cleans the surface (such as, skin) without leaving a sticky residue or causing irritation. The cleansing composition of the present disclosure is configured to redefine personal care cleansing by introducing a convenient, sustainable, and effective solution that prioritizes both user experience and environmental responsibility. Notably, the unique combination of ingredients used in the cleansing composition surpasses existing (or conventional) solutions such as, rinse- free products, by noticeably improving the after-feel on the skin and cleansing efficacy thereof.

[0017] Conventional cleansing routines often require rinsing with water, a step that can be inconvenient and environmentally taxing, especially when water access is limited. The sheer volume of water used during rinsing raises concerns, leading to the development of rinse-free cleansing compositions which offer convenience and the potential for significant water conservation.

[0018] However, existing rinse-free cleansing compositions may suffer from drawbacks. Some formulations might leave a significant residue on the skin, causing a sticky or uncomfortable feeling such as, formulations with high surfactant levels (above 1% and reaching 5%) can leave an unpleasant sticky feeling on the skin. Others may lack sufficient cleansing power to effectively remove dirt and grime. Several attempts have been made to solve the aforementioned problem such as, adding low levels of oil-absorbing materials like clays, starches, or cellulose-based absorbents, or incorporating ethanol. While such solutions can potentially address the stickiness issue, other drawbacks still persist.

[0019] The present invention aims to overcome the limitations faced by conventional solutions by providing a novel rinse-free cleansing composition that offers effective cleansing without requiring rinse-off or excess water usage. The cleansing composition is designed to be gentle on the skin while leaving it feeling clean and refreshed. The developed cleansing composition balances cleansing efficacy with minimal residue, promoting convenience and environmental sustainability. The rinse-free cleansing composition which, being stable and having an extremely low skin irritating property, ensures high skin comfort, and exhibits enhanced cleansing ability owing to the better surface distribution, cushion foam improvement, reduction of foam's bubbles size, rinse-off improvement, reduction of residue causing stickiness feeling on skin, enhanced long- lasting surface smoothness, when used in a cosmetic preparation or the like. Optionally, the cleansing composition is then formulated together with other active ingredients like emulsifying foaming agents, other surfactants, antistatic, foam boosting agents, conditioning agents, viscosity controlling agents, bulking, masking agents, buffer agents, humectants, preservatives, perfuming agents, to obtain the final high- performance cleansing composition of the present disclosure.

[0020] In one or more embodiments, the cleansing composition is formulated as at least one of: a spray, a self-foamer, a wipe, or a gel. Optionally, the multiple components (i.e., solute(s) and solvent(s)) of the cleansing composition are stored in a dispensing unit (such as, a spray, fluid dispenser, and the like), optionally having multiple compartments for individually storing each of the multiple components of the cleansing composition and thereby mixing the multiple components based on either predefined configuration(s), or user-defined configuration(s), to provide a customized cleansing composition developed based on the needs of the user and / or implementation.

[0021] In one or more embodiments, the cleansing composition is at least one of: a hair care product, a cosmetic product, a hygiene product, or a medicament. The cleansing composition of the disclosure may be implemented as an appropriate hair care product selected from the group consisting of, but not limited to, shampoos, hair conditioners, rinse-out conditioners, hair treatment compositions, hair colouring systems, hair care sprays and other non-aerosol sprays. Further, the cleansing composition may be implemented as an cosmetic product such as, skin care products, selected from the group consisting of, but not limited to, sunscreen products, compositions comprising UV blockers or protectors, anti-aging products, foundations, moisturizing preparations, tanning preparations, skin care moisturizers, skin wet wipes, skin pore wet wipes, pore cleansers, blemish reducers, skin scrubs, skin peel enhancers, skin wipes, ointments, skin protectants, skin powders, facial cleansers, antiacne preparations, bath products, shower products, liquid soaps, bar soaps, body oils, body lotions, body gels, hand liquids, shaving lotions, aftershave or pre-shave products, etc. Furthermore, the cleansing composition may be implemented as an appropriate fragrance and / or preparation consisting of, but not limited to, odorous ingredients, deodorizing and antiperspirant preparations, protection formulations, treatment creams, lipsticks, dry and wet makeup, powders, depilatory agents. Furthermore, the cleansing composition may be implemented as personal care rinse products consisting of, but not limited to, gels, scrubs, astringents, anhydrous creams and lotions, Oil-water, macro and microemulsions, water-resistant creams and lotions, mouthwashes, etc. Furthermore, the cleansing composition may be implemented as medicaments such as, but not limited to, ointment bases, topical wound healing products, talcum spray, barrier sprays, herbal extract preparations and / or controlled release products. It will be appreciated by a person skilled in the art that the implementation of the cleansing composition of the present disclosure is dependent upon the specific type and properties of the compositions used therein and may be varied as per the implementation without any limitations to the present disclosure.

[0022] The rinse-free cleansing composition of the present disclosure comprises a solute part in an amount ranging 1.13% weight by weight (w / w) to 12.25% w / w with respect to a total weight of the rinse-free cleansing composition. The term "solute part" as used herein refers to a specific portion of the cleansing composition operable to be dissolved (or mixed) with another substance (or solvent) to form the cleansing solution. Typically, the solute part contains active cleansing ingredients and other functional components that dissolve in a given solvent to give characteristic cleansing capability to the cleansing composition. The solute part of the cleansing composition is present in a concentration range of 1.13% w / w to 12.25% w / w with respect to the total weight of the rinse-free cleansing composition i.e., the solute part of the cleansing composition comprises anywhere between 1.13 to 12.25% of the total weight of the cleansing composition. For example, in a given cleansing composition having a total weight of 100g, the solute part having a concentration of 5% w / w with respect to the total weight of the cleansing composition (solute part, solvent part, and potentially other ingredients) implies 5 grams (g) of solute part per 100g of the cleansing composition. The total weight of the cleansing composition comprises at least the solute part and a solvent part as will be discussed in detail hereinafter. It will be appreciated by a person skilled in the art that the exact amount of solute part in the cleansing composition will depend on the desired cleaning efficacy and other formulation factors and may be varied as per the needs of the implementation without any limitations to the present disclosure.

[0023] Herein, the solute part comprises a surfactant composition in an amount ranging 0.02% w / w to 1.20% w / w with respect to the total weight of the cleansing composition. The term "surfactant" as used herein refers to a surface-active agent i.e., a molecule with a unique structure having capability to interact with both water and oil. For example, the surfactant composition may include sodium methyl 2-sulfolaurate and disodium 2- sulfolaurate. The surfactant(s) generally comprise a hydrophilic head (attracted to water) and a hydrophobic tail (repellent to water) to provide the dual-functionality of interacting with both water and oil(s). Herein, the surfactant composition is configured to lower the surface tension of the cleansing composition to allow effective cleaning via the cleansing composition. In an embodiment, the surfactant composition includes at least a sodium salt of 2-Sulfolauric acids and Sodium Lauryl Sulfoacetate.

[0024] Conventionally, the observed approximate level of surfactants used in existing rinse-free cleansing products is typically higher than 1% and up to 5% of the total weight of the said product, which results in a sticky residue feeling and significant efforts have been made combatting the undesired after-feel such as, addition of low level of oil absorbing particles (clays, starches, cellulose type of absorbents) or ethanol, and thus, potentially required to be towelled-off for physical removal of residue. Thus, in light of the aforementioned problem, the cleansing composition of the present disclosure utilizes low levels of the surfactant composition i.e., in the range of 0.02% w / w to 1.20% w / w with respect to the total weight of the cleansing composition, in order to eliminate, or at least minimize, the sticky residue feeling on application of the cleansing composition. In an exemplary scenario, the surfactant composition is utilized in a concentration of 0.60% w / w with respect to the total weight of the cleansing composition. In a preferred embodiment, the rinse-free cleansing composition comprises the surfactant composition in an amount of less than 1.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably less than 0.6% w / w, more preferably less than 0.5% w / w, most preferably less than 0.4% w / w, with respect to the total weight of the rinse-free cleansing composition. For example, the rinse- free cleansing composition may comprise the surfactant composition in an amount of 0.02 to 1.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably 0.04% w / w to 0.6% w / w, more preferably 0.06% w / w to 0.5% w / w, most preferably 0.06% w / w to 0.4% w / w, especially 0.12% w / w to 0.4% w / w, with respect to the total weight of the rinse-free cleansing composition.

[0025] In one or more embodiments, the surfactant composition is selected from at least one of: an anionic surfactant, an amphoteric surfactant, a nonionic surfactant, or a mixture thereof. Typically, at least one of an anionic surfactant, an amphoteric surfactant, a non-ionic surfactant is utilized either separately, or in combination with one another, to improve the desired properties of the surfactant composition. It will be appreciated that the specific type of surfactant chosen for the rinse-free cleansing composition will depend on several factors including, but not limited to, desired cleaning power (for e.g., anionic surfactants generally offer the strongest cleaning action), mildness (for e.g., non-ionic surfactants are often preferred for sensitive skin applications) and compatibility with other active ingredients. The surfactant composition preferably comprises or consists of two or more different surfactants, preferably three or more different surfactants, more preferably three or four different surfactants. The use of two or more different surfactants, especially three or four different surfactants, has been found to improve the mildness of the composition. Throughout the present disclosure, the term "anionic surfactant" as used herein refers to a class of surfactants (or cleaning agents) characterized by negatively charged hydrophilic head allowing effective interactive with contaminants for cleaning thereof. For example, the anionic surfactant may be at least one of Sodium Methyl 2-Sulfolaurate and Disodium 2- Sulfolaurate, Sodium Cocoyl Glutamate. Optionally, the anionic surfactant is selected from at least one of Alkyl Ether Sulfates, Alkyl Sulfates, Acyl Isethionates, Alkyl Sulfonates, Sulfosuccinates, Alkylaryl Sulfonate, Sulfoacetates, Acyl Methyl Isethionates, Alkyl Ether Carboxylates, Ester Carboxylic Acids, Acyl Glycinates, Acyl Glutamates, Acyl Peptides, Fatty Acid Soaps, Acyl Sarcosinates, Sodium Methyl Acyl Taurates, Acyl Alaninate, Sulfonated Surfactant Polymer (Poly APG), surfactants of the phosphoric acid class, amino acid derived surfactants, and other mild surfactants.

[0026] Optionally, in the anionic surfactants, the Alkyl Ether Sulfates and / or Alkyl Sulfates are selected from at least one of Ammonium Alkyl PEG-n Sulfate (Sodium Laureth Sulfate, Sodium Trideceth Sulfate, Sodium Laureth-1 Sulfate, Ammonium Lauryl Sulfate, Sodium Coceth Sulfate, Sodium Myreth Sulfate, Sodium Laureth Sulfate, Sodium Laureth 8- Sulfate, Magnesium Laureth Sulfate, Magnesium Laureth 8-Sulfate, Sodium Oleth Sulfate, and Magnesium Oleth Sulfate). Optionally, the Acyl Isethionates is Sodium Cocoyl Isethionate. Optionally, the Alkyl Sulfonates is selected from at least one of Sodium Alkylether Sulfonate, Sodium Alkylglyceride, and Sulfonate Sodium Alkenyl Sulfonate (Sodium C14-16 olefin sulfonate). Optionally, the Sulfosuccinates is selected from Dialkyl Sodium Sulfosuccinate, Disodium alkyl PEG-n Sulfosuccinate, Disodium Alkyl Sulfosuccinate, Sodium Laureth Sulfosuccinate, Disodium Oleamido MIPA Sulfosuccinate, Disodium Laureth Sulfosuccinate, and Disodium Lauryl Sulfosuccinate. Optionally, the, Alkylaryl Sulfonate and / or Alkyl Sulfonates are selected from at least one of Sodium Alkylbenzene Sulfonate, Sodium Lauroyl Sulfoacetate, Alpha Olefin Sulfonates, and Sodium Lauryl Sulfoacetate. Optionally, the Acyl Methyl Isethionates is selected from at least one of Sodium Lauroyl Methyl Isethionate, and Sodium Cocoyl Methyl Isethionate. Optionally, the Alkyl Ether Carboxylates and / or Ester Carboxylic Acids is selected from at least one of Sodium Acyl Lactylate, Dinonoxynol-9 Citrate, Sodium Laureth-13 Carboxylate, Calcium Stearoyl Lactylate, Laureth-6 Citrate, Laureth-11 Carboxylic Acid, Laureth-5 Carboxylic Acid, Trideceth-7 Carboxylic Acid, Sodium Lauryl Glucose Carboxylate, Potassium Laureth- 4 Carboxylate, Trideceth-7 Carboxylic Acid, and Laureth-7 Citrate. Optionally, the Acyl Glycinates is selected from at least one of Potassium Cocoyl Glycinate, Sodium Cocoyl Glycinate, Sodium Lauroyl Glycinate. Optionally, the Acyl Glutamates is selected from at least one of Sodium Acyl Glutamate, Sodium Cocoyl Glutamate, Disodium Cocoyl Glutamate, Sodium Lauroyl Glutamate, and Sodium Myristoyl Glutamate. Optionally, the amino acid derived surfactants and / or Acyl Peptides are selected from at least one of Potassium Acyl-Hydrolysed Protein, Sodium Acyl -Hydrolysed Protein, Sodium Cocoyl Apple Amino Acids, Sodium Lauroyl Oat Amino Acids, and Potassium Cocoyl Hydrolyzed Soy Protein. Optionally, the fatty acid soap comprises Potassium Cocoate. Optionally, the Acyl Sarcosinates and / or Ammonium Acyl Sarcosinate includes Sodium Lauroyl Sarcosinate. Optionally, the Sodium Methyl Acyl Taurates include Sodium Methyl Acyltaurate, Sodium Methyl Cocoyl Taurate, and Sodium Methyl Oleoyl Taurate. Optionally, the Acyl Alaninate includes Sodium Cocoyl Alaninate. Optionally, the Sulfonated Surfactant Polymer (Poly APG) includes Sodium Hydroxypropylsulfonate Laurylglucoside Crosspolymer, Sodium Bis-Hydroxyethylglycinate Coco-Glucosides Crosspolymer, Sodium Bis- Hydroxyethyl glycinate Lauryl-Glucosides Crosspolymer, and Sodium Hydroxypropyl phosphate Decylglucoside Crosspolymer. Optionally, the other mild surfactants include, but are not limited to, Disodium Laurylglucosides Hydroxypropyl Citrate, Glycolipids, Lecithin, Saponin based surfactants (Quillaja saponaria). Further, the term "amphoteric surfactant" as used herein refers to a class of surfactants exhibiting both cationic and anionic properties depending upon pH of the cleansing composition. For example, the amphoteric surfactant is Cocamidopropyl Betaine that offers good cleaning power, and can act as an antistatic agent (to reduce static cling). Optionally, the amphoteric surfactant is selected from at least one of Alkyl amphoacetates, Alkyl Betaines, Amidopropyl Betaines, Sultaines, Acyl and Dialkyl Ethylenediamines and derivatives thereof, and N-Alkylamino acids (derived from various amino acids).

[0027] Optionally, the Alkylamphoacetates include at least one of Cocoamphoacetates, Sodium cocoamphoacetate, Disodium Cocoamphodiacetate, Sodium Lauroamphoacetate, and Disodium Lauroamphodiacetate. Optionally, the Alkyl Betaines include at least one of Lauryl Betaine, Coco-Betaine, and Cetyl Betaine. Optionally, the Amidopropyl Betaines include Cocamidopropyl Betaine. Optionally, the Sultaines include Cocamidopropyl Hydroxysultaine, Cocamidopropyl Hydroxysultaine, Lauryl Hydroxysultaine, Babassuamidopropyl Hydroxysultaine, and Lauryl Hydroxysultaine. Optionally, the Acyl and Dialkyl Ethylenediamines and derivatives thereof include, but are not limited to, Sodium Acylamphoacetate, Disodium Acylamphodipropionate, Sodium Acylamphohydroxypropylsulfonate, Disodium

[0028] Acylamphodiacetate, Sodium Acylamphopropionate, Sodium lauroyl methylaminopropionate, Disodium cocoamphodipropionate, and Sodium Cocoamphohydroxypropylsulfonate. Optionally, the N-Alkylamino acids (derived from various amino acids) include Aminopropyl Alkylglutamide, Alkyl Aminopropionic Acid, Sodium Alkyliminodipropionate, and Aminopropyl Laurylglutamide.

[0029] Furthermore, the term "non-ionic surfactant" as used herein refers to another type of surfactant characterized by the lack of a charged head (group). For example, the non-ionic surfactant is at least one of Caprylyl / Capryl Glucoside that is derived from sugars and fatty alcohols and offers good cleaning power, while being readily biodegradable and gentle on the skin. Optionally, the non-ionic surfactant is selected from at least one of Alkyl Polyglucosides, Alkyl Methyl Glucamides, Propypoxylated, Polyoxyethylene (POE) Ethers, Polymeric Ethers, Esters, Ethoxylated Glycerides and Alkoxylated alcohols.

[0030] Optionally, the Alkyl Polyglucosides include Alkylglucoside, Decyl Glucoside, Capryl Glucoside, Caprylyl / Capryl Glucoside, Lauryl Glucoside, Heptyl Glucoside, and Coco Glucoside. Optionally, the Alkyl Methyl Glucamides include Sodium Cocoyl Glutamate. Optionally, the Propypoxylated Polyoxyethylene (POE) Ethers include Poloxamers (such as, Poloxamer 184, Poloxamer 188). Optionally, the Esters include, but are not limited to, PEG-n diacylate, PEG-n acyalate, (PEG-8 dilaurate, PEG-8 laurate), Ethoxylated Glycerides, PEG-n Glyceryl Acylate, Polyglyceryl Esters, Polyglyceryl -n Acylate (Polglyceryl-6 distearate, Polyglyceryl-4 Laurate, Polyglyceryl -4 Oleyl Ether, Polyglyceryl-6 Caprylate, Polyglyceryl-3 Cocoate, Polyglyceryl-4 Caprate, Polyglyceryl-6 Oleate, Polyglyceryl-4 Laurate / Sebacate, Polyglyceryl-4 Ca pry late / Ca prate, Polyglyceryl-6 Ricinoleate), Polyglyceryl-n Alkyl Ether, Polyhydric Alcohol Esters and Ethers, Sucrose Acylate, Sucrose Esters (Sucrose Laurate, Sucrose Stearate, Sucrose Palmitate), Sorbitan / Sorbitol Esters, POE-Sorbitan Acylate, and 1,4 Sorbitan Acylate (Polysorbate 20, Polysorbate-21, PEG-80 Sorbitan Laurate). Optionally, the Ethoxylated Glycerides and / or the Alkoxylated alcohols include, but are not limited to, PEG-n Glyceryl Acylate (PEG-40 Glyceryl Cocoate, PEG- 40 Hydrogenated Castor Oil, Laureth-4, Laureth-23, PEG-6 Caprylic / Capric Glycerides, PEG-7 Glyceryl Cocoate, PEG-30 Glyceryl Stearate, PEG-80 Sorbitan Laurate, PEG- 150 Distearate).

[0031] Typically, pre-customized blends of the surfactant composition are utilized in the cleansing composition configured to provide selectively enhanced properties such as, foaming ability, cleaning ability, etc., based on the intended implementation. In one embodiment, the surfactant composition comprises at least one of Sodium Methyl 2-Sulfolaurate, preferably in an amount ranging 0.034% w / w to 1.02% w / w, such as 0.034% w / w to 0.34% w / w, of the total weight of the cleansing composition, and di-sodium 2-sulfolaurate, preferably in an amount ranging 0.006% w / w to 0.18% w / w, such as 0.006% w / w to 0.06% w / w, of the total weight of the cleansing composition. Notably, the surfactant composition is preferably a neat surfactant composition and may range between 0.04% w / w to 1.20% w / w of the total weight of the cleansing composition. In one embodiment, two anionic surfactants i.e., Sodium Methyl 2-Sulfolaurate and di-sodium 2-sulfolaurate, that are derived from oleochemicals (such as, coconut or palm kernel oil) are utilized by the cleansing composition to improve the cleaning power while ensuring environmental friendliness of the cleansing composition. It will be appreciated that the concentration (or quantity) of each surfactant of the surfactant composition depends upon the desired cleaning performance and other formulation factors and may be varied based on the implementation. For the avoidance of doubt, unless explicitly stated, the ranges disclosed herein for the amount of surfactant composition in the rinse-free cleansing composition refer to the neat amount of surfactant composition with respect to the total weight of the rinse-free cleansing composition, i.e. excluding any solvents that may be present in the surfactant composition.

[0032] In another embodiment, the surfactant composition comprises at least one of Sodium Methyl 2-Sulfolaurate in an amount ranging 30% w / w to 38% w / w of a total weight of the surfactant composition, Di-sodium 2- sulfolaurate in an amount ranging 2% w / w to 10% w / w of the total weight of the surfactant composition, and an aqueous solvent in an amount ranging 52% w / w to 68% w / w of the total weight of the surfactant composition. Notably, in this embodiment the surfactant composition is a diluted composition and ranges between 0.1% w / w to 3% w / w of the total weight of the cleansing composition.

[0033] In one or more embodiments, the surfactant composition comprises at least one of Sodium Methyl 2-Sulfolaurate, preferably in an amount ranging 0.009% w / w to 0.27% w / w, such as 0.009% w / w to 0.09% w / w, of the total weight of the cleansing composition, Disodium 2-Sulfolaurate, preferably in an amount ranging 0.001% w / w to 0.03% w / w, such as 0.001% w / w to 0.01% w / w, of the total weight of the cleansing composition, and Sodium Lauryl Sulfoacetate, preferably in an amount ranging 0.01% w / w to 0.3% w / w, such as 0.01% w / w to 0.1% w / w, of the total weight of the cleansing composition. Notably, the surfactant composition is preferably a neat surfactant composition and may range between 0.02% w / w to 0.6% w / w of the total weight of the cleansing composition. In one embodiment, three anionic surfactants i.e., Sodium Methyl 2-Sulfolaurate, di-sodium 2-sulfolaurate, and Sodium Lauryl Sulfoacetate, that are derived from oleochemicals (such as, coconut or palm kernel oil) are utilized by the cleansing composition to further improve the cleaning power while ensuring environmental friendliness of the cleansing composition.

[0034] In another embodiment, the surfactant composition comprises Sodium Methyl 2-Sulfolaurate in an amount ranging 7% w / w to 13% w / w of a total weight of the surfactant composition, Disodium 2-Sulfolaurate in an amount ranging 1% w / w to 3% w / w of the total weight of the surfactant composition, Sodium Lauryl Sulfoacetate in an amount ranging 8% w / w to 15% w / w of the total weight of the surfactant composition, Sodium Citrate in an amount ranging 0.015% w / w to 0.45% w / w of the total weight of the surfactant composition, Sodium Benzoate in an amount ranging 0.04% w / w to 1.2% w / w of the total weight of the surfactant composition, and an aqueous solvent in an amount ranging 67.35% w / w to 83.81% ww) of the total weight of the surfactant composition. Notably, in this embodiment the surfactant composition is a diluted surfactant composition and ranges between 0.1% w / w to 3% w / w of the total weight of the cleansing composition.

[0035] In one or more embodiments, the solute part further comprises an active surfactant in an amount ranging 0.01% w / w to 1.00% w / w with respect to the total weight of the cleansing composition, and wherein the active surfactant is a sodium-based surfactant. The term "active surfactant" as used herein refers to a type of surfactant compatible with both anionic and cationic surfactants and configured for targeted cleansing via the cleansing composition. For example, the active surfactant comprises an anionic headgroup and a sodium-based component as a cation (positively charged ion). The active surfactant is compatible with the surfactant composition of the solute part owing to the unique structure thereof that allows for lowering of the surface tension, promotion of wetting, spreading, and the effective removal of contaminants such as, dirt and grime, via the cleansing composition. Herein, the active surfactant is a sodium-based surfactant derived from fermentation and refinement of bio-based materials, for example, sodium surfactin made from Bacillus subtilis. Beneficially, the implemented active surfactant is an eco-friendly alternative compatible with the surfactant composition that provides enhanced cleaning efficacy and simultaneously offers additional benefits including, but not limited to, anti-inflammatory characteristics, skin penetration enhancement, and so forth, to the cleansing composition and will be described in detail later in the present disclosure.

[0036] In a preferred embodiment, the surfactant composition comprises at least one surfactant selected from the group of: Disodium Coco-Glucoside Citrate, Sodium Methyl 2-Sulfolaurate, Di-sodium 2-sulfolaurate, Sodium Lauryl Sulfoacetate, Capryloyl / Caproyl Methyl Glucamide, and Sodium Lauroyl Sarcosinate. In an especially preferred embodiment, the surfactant composition comprises Disodium Coco-Glucoside Citrate and preferably at least one of Sodium Methyl 2-Sulfolaurate, Di-sodium 2- sulfolaurate, Sodium Lauryl Sulfoacetate, Capryloyl / Caproyl Methyl Glucamide, and Sodium Lauroyl Sarcosinate.

[0037] The solute part further comprises at least one humectant, preferably in an amount ranging 1.00% w / w to 5.00% w / w with respect to the total weight of the cleansing composition. The rinse-free cleansing composition incorporates the at least one humectant within the solute part to enhance its user experience. These hygroscopic agents, typically included at a concentration between 1% and 5% by weight of the entire composition, contribute to moisture retention on the skin, preventing a drying sensation and potential irritation. In an exemplary scenario, the at least one humectant is Propanediol and utilized in a concentration of 3% w / w with respect to the total weight of the cleansing composition. In one or more embodiments, the at least one humectant is selected from at least one of: glycerine, Propanediol, 1,2-Hexanediol, Pentylene Glycol, and Propylene glycol. The use of Pentylene Glycol and / or Propanediol, especially Pentylene Glycol, is particularly preferred.

[0038] The solute part further comprises at least one buffer agent, preferably in an amount ranging 0.01% w / w to 0.10% w / w, preferably 0.01% w / w to 0.05% w / w with respect to the total weight of the cleansing composition. The at least one buffer agent is operable to maintain a stable pH level of the cleansing composition to ensure a desired cleaning performance and surface compatibility such as, with different skin(s) of user(s), for the cleansing composition while being effectively preserved for long durations. Notably, the at least one buffer agent occupies a small percentage i.e., ranging from 0.01% w / w to 0.05% w / w of the total weight, and offers several benefits and alternatives at the same time. In one or more embodiments, the at least one buffer agent is selected from at least one of: sodium hydroxide (a base), lactic acid (an acid), citric acid, and sodium citrate (a salt), and the like. Beneficially, the at least one buffer agent enhances the stability, cleaning performance, and skin compatibility of the cleansing composition.

[0039] In one or more embodiments, the solute part further comprises at least one deodorizing agent, preferably in an amount ranging 0.10% w / w to 6.00% w / w with respect to the total weight of the rinse-free cleansing composition. Optionally, the deodorizing agent is selected from at least one of: Sodium Caproyl / Lauroyl Lactylate, Triethylcitrate, Zinc Ricinoleate, Polyglyceryl-3 Caprylate. In an exemplary scenario, the at least one deodorizing agent is Triethyl citrate and used in an amount ranging 0.50% w / w to 2.50% w / w with respect to the total weight of the rinse-free cleansing composition. It will be appreciated that although Triethyl citrate is classified as a deodorizing agent, it may be alternatively utilized as a conditioning agent, an enhancement agent, an emollient, a solvent, and the like, without any limitations. For the avoidance of doubt, when the at least one deodorizing agent comprises triethyl citrate, the amount of triethyl citrate present is counted towards the total amount of triethyl citrate in the composition and not the amount of deodorizing agent.

[0040] In one or more embodiments, the solute part further comprises at least one emollient in an amount ranging 0.10% w / w to 0.50% w / w with respect to the total weight of the rinse-free cleansing composition. Optionally, the at least one emollient is selected from at least one of: lauryl lactyl lactate, Isoamyl Laurate, Triethyl Citrate and other citrate esters (example Tri-C12-13 Alkyl Citrate) and other lactate esters (examples lauryl lactyl lactate, C12-13 Alkyl Lactate, Ethyl lactate). In other examples, the at least one emollient may be selected from at least one of oils (for example, mineral oil, vegetable oils (e.g., olive oil, coconut oil), shea butter, cocoa butter, etc.), esters (such as, isopropyl palmitate, cetyl palmitate, etc.), fatty alcohols (such as, cetearyl alcohol, stearyl alcohol, etc.), silicones (such as, Dimethicone, cyclomethicone, etc.), or selected from the at least one humectant (such as, glycerin). For the avoidance of doubt, when the at least one emollient comprises triethyl citrate, the amount of triethyl citrate present is counted towards the total amount of triethyl citrate in the composition and not the amount of emollient.

[0041] In one or more embodiments, the solute part further comprises a fragrance agent, preferably in an amount ranging 0.001% w / w to 3.000% w / w with respect to the total weight of the rinse-free cleansing composition. Optionally, the fragrance agent is selected from at least one of an essential oil or a synthetic fragrance blend. Optionally, the essential oil blend is made from at least one of Ambrette, Angelica root, Angelica seed, Star Anise, Anise, Armoise, Basil, Bay, Benzoin, Bergamot, Bitter Orange, Buchu, Black Pepper, Cabreuva, Cajuput, Camphor, Cananga, Caraway, Cardamom, Carrot, Cascarilla, Cassia, Cedarwood, Celery, Chamomile Roman, Chamomile Blue, Cinnamon, Cistus, Citronella, Clary Sage, Clove, Clary Sage, Copaiba, Coriander, Corn mint Arvensis, Cubeb, Cypress, Davana, Dill, Elemi, Estragon, Tarragon, Eucalyptus, Fennel, Frankincense, Galbanum, Geranium, Ginger, Grapefruit, Guaiac wood, Gurjun, Hay, Helichrysum, Ho, Hop, Hyssop, Immortelle, Jasmine, Juniper Berry, Labdanum, Lemon Tea Tree Oil, Laurel, Lavandin, Lavender, Lemon, Lemon Petitgrain, Lemongrass, Lime, Litsea cubeba, Mace, Mandarin, May Chang, Marjoram, Mentha citrata, Myrrh, Myrtle, Neroli, Niaouli, Nutmeg, Oakmoss, Olibanum, Opoponax, Orange, Oregano, Origanum, Palmarosa, Parsley, Patchouli, Peppermint, Spearmint, Mint, Petitgrain, Peru oil, Pimento, Pine, Rose oil, Rosemary, Rosewood, Sage, Sandalwood, Schinus molle, Spikenard, Styrax resin, Valerian, Vetiver, Ylang, Tobacco absolute, Thyme, Tea Tree, Tagete, Tangerine, Red Thyme, Tolu, Tonka, Tree moss, Valerian, and Vanilla.

[0042] In one or more embodiments, the solute part further comprises at least one active agent, preferably in an amount ranging 1.00% w / w to 5.00% w / w with respect to the total weight of the cleansing composition, and wherein the at least one active agent is selected from at least one of: Arginine, Creatine, Erythrite, Betaine, Allantoin, Bio-saccharide Gum-1, Pullulan, Cyanocobalamin, Alpha-Glucan Oligosaccharide, Inulin, Sodium PCA, Aloe Vera, Aloe, Asparagus, Artichoke, Aronia, Arnica, Acai, Acacia, Avocado, Apricot, Apple, Peach, Raspberry, Raspberry Ketone, Kiwi, Papaya, Hops, Cucumber, Cherry, Strawberry, Apple Vinegar, Pink Grapefruit, Black Pepper, Barley, Calendula, Chamomile, Cocoa, Centella Asiatica, Coconut, Hibiscus, Juniper, Fennel, Fucus, Coffee, Edelweiss, Guarana, Ginger, Ginko Biloba, Black oat or Oat, Algae, Green tea. Eclipta, Pumpkin seed, Lime, Marshmallow, Olive, Pomegranate, Red Clover, Wheat, Mushroom, Mint, Orange Blossom Extract, Ivy, Quinoa, Fermented Skimmed Milk, Witch Hazel, Watermelon, Royal Jelly, Rosemary, Nettle, Sweet Almond, Soy, Levander, Tomato, Broccoli, Kale, Seaweed, Willow, Saw Palmetto, Quillaya Saponaria, Rice, Cotton and Turmeric extracts. The term "active agent" as used herein refers to a functional ingredient of the solute part of the cleansing composition operable to achieve specific benefits (beyond cleansing) therefor. For example, the at least one active agent included in the solute part may comprise erythrite in an amount ranging 0.5% w / w to 2.5% w / w with respect to the total weight of the cleansing composition.

[0043] In one or more embodiments, the solute part further comprises at least one enhancement agent, preferably in an amount ranging 0.50% w / w to 1.50% w / w with respect to the total weight of the cleansing composition, and wherein the enhancement agent is a non-ionic amylomer. The term "enhancement agent" as used herein includes cosmetically and pharmaceutically useful materials operable to function as a thickener, film former, texturizer, humectant, moisturizer, conditioner or emollient. It is recognized that some enhancement agents can serve more than one function in a composition, e.g., as an emulsifying agent, lubricant, and / or solvent. Herein, the enhancement agent is a non-ionic polymer i.e., a starch-based polymer that can function as thickeners, film formers, and texturizing agents, etc., and includes, but is not limited to, sodium hydroxypropyl oxidized starch succinate. The inclusion of the enhancement agent is done to potentially improve the performance or user experience of the cleansing composition. Beneficially, the enhancement agent increases the thickness of the rinse-free cleansing composition and provides a more desirable texture and feel on skin surfaces. Additionally, the enhancement agent may create a thin film on the skin, aiding in moisture retention and delivery of other functional ingredients while simultaneously improving the stability and shelf life of the rinse-free cleansing composition.

[0044] In one or more embodiments, the solute part further comprises at least one chelation agent, preferably in an amount ranging 0.001% w / w to 1.000% w / w with respect to the total weight of the cleansing composition, and wherein the at least one chelation agent is selected from at least one of Sodium Gluconate and Sodium Phytate. The at least one chelation agent is configured to bind to metallic ions in order to prevent interaction with other solute components of the cleansing composition. The at least one chelation agent may improve the overall stability and shell life of the cleansing composition by minimizing the aforementioned unwanted interactions that may potentially inhibit cleansing action of the surfactant composition or the cleansing composition.

[0045] In one or more embodiments, the solute part further comprises at least one thickening agent, preferably in an amount ranging 0.01% w / w to 5.00% w / w with respect to the total weight of the rinse-free cleansing composition, and wherein the at least one thickening agent is one of a natural thickening agent or a synthetic thickening agent. Typically, the at least one thickening agent is configured to increase the viscosity (thickness) of the cleansing composition in order to improve user experience, product stability or consistency, and effective delivery of active ingredients i.e., delivery of functional ingredients to the intended surface such as, skin. Herein, the thickening agent is either a natural thickening agent (derived from natural sources) such as, cellulose and derivates thereof, or a synthetic thickening agent such as, acrylic acid polymers, acrylates / steareth-20 methacrylate copolymer, etc.

[0046] Optionally, the natural thickening agent is selected from at least one of Acacia Senegal Gum, Ceratonia Siliqua Gum, Cellulose, Microcrystalline Cellulose, Hydroxyethyl Methylcellulose, Hydroxypropyl Methylcellulose, Cellulose Gum, Xanthan Gum, Diutan Gum, Hydroxyethyl cellulose, Gellan Gum, Carrageenan, Pectin, Succinoglycans, sodium magnesium fluorosilicate. Further, optionally, the synthetic thickening agent is selected from at least one of Acrylates, Carbomers, Acrylate / Alkyl Acrylate Cross polymers (Carbomer, Acrylates / C10-30 Alkyl Acrylate Cross polymer), Sodium Polyacrylate, Ammonium Acryloyldi methyltaurate / VP Copolymer, Sodium Polyacryloyldimethyl Taurate, Polyacrylic Acid, Sodium Carboxymethyl Starch.

[0047] Herein, the solute part comprises a preservative composition, comprising at least one preservative and / or at least one preservative booster, preferably in an amount ranging 0.10% w / w to 6% w / w with respect to a total weight of the cleansing composition, preferably 0.10% w / w to 3.50% w / w, more preferably 0.10% w / w to 2.00% w / w, with respect to the total weight of the rinse-free cleansing composition. The term "preservative composition" as used herein refers to a preservative blend configured for solubilization of preservatives and extension of shelf life of the cleansing composition. The preservative composition comprises preservatives and / or preservative boosters, preferably in an amount ranging 0.01% w / w to 6.00% w / w. For example, the preservative composition may include at least methyl propanediol and Caprylyl Glycol in an amount of 0.35% w / w of the total weight of the cleansing composition. Optionally, the preservative composition may also include solvents (with preservation boosting characteristics), skin conditioners, humectants, emollients with preserving activities, and other salts. The preservative composition offers several benefits, including enabling lower surfactant usage, improved solubility of various components, and contributes to a more pleasant user experience by reducing stickiness and irritation. The preservative composition provides a readily water- soluble, cost-efficient option having sufficient lipophilicity that helps maintaining usage of solubilizers and other surface-active materials (foaming cleansers) below the critical (or average) usage level that causes the undesired stickiness. Moreover, by improving overall ingredient solubility, the preservative composition reduces the requirement for additional solubilizers, which can further contribute to a less sticky feel. It will be appreciated that the choice of preservatives used in the preservative composition depends on factors like desired efficacy, compatibility with other ingredients, and regulatory considerations. For the avoidance of doubt, unless explicitly stated, the ranges disclosed herein for the amount of preservative composition in the rinse-free cleansing composition refer to the neat amount of preservative composition with respect to the total weight of the rinse-free cleansing composition, i.e. excluding any solvents that may be present in the preservative composition.

[0048] In one or more embodiments, the preservative composition comprises benzyl alcohol and phenoxyethanol present in equal amounts with respect to the total weight of the preservative composition. Optionally, the preservative composition comprises benzyl alcohol in an amount ranging 1.00% w / w to 50.00% w / w with respect to the total weight of the preservative composition and phenoxyethanol in an amount ranging 1.00% w / w to 50.00% w / w with respect to the total weight of the preservative composition. In one or more embodiments, the preservative composition of the solute part comprises one or more preservatives including at least a first preservative in an amount ranging 80.50% w / w to 82.00% w / w with respect to the total weight of the preservative composition, a second preservative in an amount ranging 15.00% w / w to 16.00% w / w of the total weight of the preservative composition, and a third preservative in a range of 3.00% w / w to 3.50% w / w of the total weight of the preservative composition. Optionally, the first preservative is methyl propanediol, the second preservative (booster) is caprylyl glycol (wetting agent), and the third preservative is phenyl propanol.

[0049] In one or more embodiments, the preservative composition of the solute part further comprises at least one preservative or preservative booster in an amount ranging 0.10% w / w to 5.00% w / w with respect to the total weight of the preservative composition. Optionally, the preservative or preservative booster is selected from at least one of Phenethyl Alcohol, Phenoxyethanol, Benzoic Acid, Benzyl Alcohol, Sodium Levulinate, Caprylyl Glycol, Sodium Benzoate, Sodium Salicylate, Sodium Anisate, Potassium Sorbate, Ethylhexylglycerin, Hydroxyacetophenone, Sorbic Acid, Dehydroacetic acid, Gluconolactone, Methyl Propanediol, and Phenylpropanol, especially Potassium Sorbate. The preservative of the preservative composition is added to prevent microbial growth and spoilage in the cleansing composition. Notably, the cleansing composition preferably utilizes a combination of preservatives to achieve broadspectrum protection against various microbes. Herein, the preservative solvents of the preservative may include Phenethyl Alcohol, Phenoxyethanol, Benzyl Alcohol. Moreover, preservative salts of the preservative may include potassium sorbate, Benzoic Acid, Sodium Levulinate, Sodium Benzoate, Sodium Salicylate; Sodium Anisate Hydroxyacetophenone, Sorbic Acid, Dehydroacetic acid, Gluconolactone, operable to be solubilized directly. In a preferred embodiment, the preservative composition comprises Potassium Sorbate and at least one preservative booster. The at least one preservative booster may be selected from Methyl Propanediol, Caprylyl Glcyol, Hydroxyacetophenone, and mixtures thereof, preferably the at least one preservative booster is Hydroxyacetophenone or a mixture of Methyl Propanediol and Caprylyl Glcyol. In one embodiment, the cleansing composition comprises potassium sorbate in an amount of 0.05% w / w to 0.25% w / w, preferably 0.05% w / w to 0.20% w / w relative to the total weight of the cleansing composition.

[0050] The cleansing composition of the present disclosure further comprises a solvent part in amount ranging 87.75% w / w to 98.87% w / w with respect to the total weight of the rinse-free cleansing composition. The term "solvent part" as used herein refers to the carrier system within the cleansing composition, typically constituting a range of 87.75% w / w to 98.87% w / w with respect to the total weight of the cleansing composition.

[0051] The solvent part of the cleansing composition primarily consists of an aqueous solvent configured to act as a primary liquid base for effectively dissolving and dispersing various functional ingredients of the solute part throughout the cleansing composition to ensure a homogenous mixture and facilitate the delivery of the components thereof during application. The solvent part is optimally selected based on at least solubility, volatility, skin compatibility, and other safety considerations associated with the cleansing composition. Optionally, the aqueous solvent is demineralized water. Herein, the aqueous solvent is demineralized such as, via distillation or ion exchange, to prevent unwanted interaction of minerals with the cleansing composition, or components thereof in order to improve stability, consistency and performance of the cleansing composition of the present disclosure. In one or more embodiments, the cleansing composition has a pH within the range of 3.5 to 7.2 and / or a specific gravity within the range of 0.97 to 1.20. Preferably the cleansing composition has a pH within the range of 4.5 to 6.0, such as 4.5 to 5.5.

[0052] It will be appreciated that the defined weight ranges of the solute part and the solvent part of the rinse-free cleansing composition is merely an optimal application range and may be varied based on the implementational requirements. In an exemplary embodiment, the solute part is present an amount ranging 2.25% w / w to 20% w / w with respect to the total weight of the rinse-free cleansing composition and the solvent part is present in an amount ranging 80.00% w / w to 97.75% w / w with respect to the total weight of the rinse-free cleansing composition.

[0053] Experimental Data:

[0054] Upon performing numerous experiments across a wide spectrum of varying implementing conditions, for example, different application surfaces or skin types, different weight ranges for different solutes in the solute part and different solvents in the solvent part of the cleansing composition, several types of enhanced rinse-free cleansing compositions were obtained having different characteristic capabilities.

[0055] Example 1

[0056] Table 1: The table illustrates two exemplary samples of the rinse-free cleansing composition having an enhanced cleaning effect offering minimal or no residue after application i.e., doesn't require rinse-off.

[0057] Example 2

[0058] A comparative study comparing the effect of surfactant level and triethyl citrate level on foam quality / skin-feel was performed. No towel off used during trial. Approximately 2 grams of product was applied to the whole arm with palm at each application. The composition of each sample is reported in Table 2 whilst the results of the foam quality / skin-feel test are reported in Table 3. Samples according to the present invention are referred to as IE1, 2,..., etc., and samples not according to the present invention are referred to as CE1, 2, ... etc. All amounts are given in % by weight and refer to the neat amount of that substance. For the evaluation of drying speed, tacky feel and film residue reported in Table 3, testing was conducted on a panel of three individuals using a 0-5 scale where: 0 = Very poor performance

[0059] 1 = Poor performance

[0060] 2 = Fair / acceptable performance

[0061] 3 = Good performance

[0062] 4 = Very good performance 5 = Excellent performance

[0063]

[0064] Table 2:

[0065]

[0066]

[0067] Table 3: Results of foam quality / skin-feel testing

[0068]

[0069] In summary, the examples demonstrate that formulations with higher surfactant (foaming / cleansing agent) levels (above 1.20%) tend to leave a tackier feel and slower drying time, often creating a 'tightness' or 'stripping' sensation, making the skin feel as if it needs washing down. In contrast, low surfactant formulas, particularly those with Triethyl Citrate, improve skin feel upon dry down and reduce the tacky afterfeel. Although low surfactant formulas can still have a tacky feel and slow dry down, the addition of Triethyl Citrate significantly reduces tack and improves the overall dry down. While Triethyl Citrate enhances skin feel, it doesn't fully counterbalance the challenges posed by higher surfactant (foaming / cleansing) concentrations, such as residue and tacky dry down. Thus both triethyl citrate and low surfactant levels are required in order to obtain the best results. Without wishing to be bound by theory therefore, it is believed that triethyl citrate and the low surfactant levels act synergistically to produce low surfactant formulas which dry faster, feel gentler, leave minimal residue, and are significantly better perceived.

[0070] Throughout the description and claims of this specification, the words "comprise" and "contain" and variations of the words, for example "comprising" and "comprises" , mean "including but not limited to", and do not exclude other components, integers or steps. Moreover, the singular encompasses the plural unless the context otherwise requires: in particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.

[0071] Preferred features of each aspect of the invention may be as described in connection with any of the other aspects. Within the scope of this application, it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and / or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and / or features of any embodiment can be combined in any way and / or combination, unless such features are incompatible.

[0072] BRIEF DESCRIPTION OF THE DRAWINGS

[0073] One or more embodiments of the invention will now be described, by way of example only, with reference to the following diagrams wherein:

[0074] FIG. 1 illustrates a tabular representation depicting different weight ranges for the surfactant composition of the rinse-free cleansing composition, in accordance with one or more embodiments of the present disclosure; and

[0075] FIG. 2 illustrates a sensorial comparison table depicting different characteristic capabilities of the cleansing composition samples, in accordance with one or more embodiments of the present disclosure.

[0076] DETAILED DESCRIPTION

[0077] Referring to FIG. 1, illustrated is a tabular representation depicting different weight ranges for the surfactant composition of the rinse-free cleansing composition, in accordance with one or more embodiments of the present disclosure. As shown, three distinct ranges i.e., a general range, a beneficial range, and an optimal range, for the neat surfactant levels of the cleansing composition are tabulated. Moreover shown, are exemplary values of neat surfactant levels in the cleansing composition for each of the aforementioned ranges.

[0078] FIG. 1 is merely an example, which should not unduly limit the scope of the claims herein. A person skilled in the art will recognize many variations, alternatives, and modifications of embodiments of the present disclosure. Referring to FIG. 2, illustrated is a sensorial comparison table depicting different characteristic capabilities of the cleansing composition samples, in accordance with one or more embodiments of the present disclosure. It will be appreciated that FIG. 2 is to be read in conjunction with TABLE 1. Herein, the sensorial comparison table is obtained via survey experimentation of 3 participants applying 2 grams of each of the two samples i.e., SAMPLE 1 and SAMPLE 2. Correspondingly, a score on a scale of 1 to 10 was obtained (10 being the best and 1 being the worst) and an average was calculated to obtain the tabulated results. Notably, towel-off was not used during trial, and each sample was applied to the whole arm via palm (of participant) at each application. Figure 2 is a schematic, non-limiting illustrations provided for exemplary purposes only. The values depicted are illustrative and are not derived from large- scale or in-vivo measured data.

Claims

CLAIMSWhat is Claimed is:

1. A rinse-free cleansing composition, comprising: a solute part in an amount ranging 1.13% w / w to 12.25% w / w with respect to a total weight of the rinse-free cleansing composition, wherein the solute part comprises: a surfactant composition in an amount ranging 0.02% w / w to 1.20% w / w with respect to the total weight of the rinse-free cleansing composition, at least one humectant, at least one buffer agent, a preservative composition, and triethyl citrate; and an aqueous solvent part in an amount ranging 87.75% w / w to 98.87% w / w with respect to the total weight of the rinse-free cleansing composition.

2. The rinse-free cleansing composition of claim 1, wherein the rinse- free cleansing composition comprises triethyl citrate in an amount of 0.1% w / w to 6.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably in an amount of 0.1% w / w to 2.5% w / w, more preferably 0.1% w / w to 1.5% w / w, most preferably 0.1% w / w to 1.0% w / w, especially 0.1% w / w to 0.5% w / w, with respect to the total weight of the rinse-free cleansing composition.

3. The rinse-free cleansing composition of any of the preceding claims, wherein the rinse-free cleansing composition comprises the surfactant composition in an amount of less than 1.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably less than 0.6% w / w, more preferably less than 0.5% w / w, most preferably less than0.4% w / w, with respect to the total weight of the rinse-free cleansing composition.

4. The rinse-free cleansing composition of any of the preceding claims, wherein the rinse-free cleansing composition comprises the surfactant composition in an amount of 0.02 to 1.0% w / w with respect to the total weight of the rinse-free cleansing composition, preferably 0.04% w / w to 0.6% w / w, more preferably 0.06% w / w to 0.5% w / w, most preferably 0.06% w / w to 0.4% w / w, especially 0.12% w / w to 0.4% w / w, with respect to the total weight of the rinse-free cleansing composition.

5. The rinse-free cleansing composition of any of the preceding claims, wherein the surfactant composition comprises or consists of two or more different surfactants, preferably three or more different surfactants, more preferably three or four different surfactants.

6. The rinse-free cleansing composition of any of the preceding claims, wherein the at least one humectant is present in an amount of 1.00% w / w to 5.00% w / w with respect to the total weight of the rinse-free cleansing composition.

7. The rinse-free cleansing composition of any of the preceding claims, wherein the at least one buffer agent is present in an amount of 0.01% w / w to 0.10% w / w with respect to the total weight of the rinse-free cleansing composition.

8. The rinse-free cleansing composition of any of the preceding claims, wherein the preservative composition, comprising at least one preservative or preservative booster, is present in an amount of 0.10% w / w to 6.00% w / w with respect to the total weight of the rinse-free cleansing composition, preferably 0.10% w / w to 3.50% w / w, more preferably 0.10% w / w to 2.00% w / w, with respect to the total weight of the rinse-free cleansing composition.

9. The rinse-free cleansing composition of any preceding claim, wherein the preservative composition comprises at least one of Phenethyl Alcohol, Phenoxyethanol, Benzoic Acid, Benzyl Alcohol, Sodium Levulinate, Sodium Benzoate, Caprylyl Glycol, Sodium Salicylate, Sodium Anisate, Potassium Sorbate, Ethylhexylglycerin, Hydroxyacetophenone, Sorbic Acid, Dehydroacetic acid, Gluconolactone, Methylpropanediol, and Phenylpropanol, especially Potassium Sorbate.

10. The rinse-free cleansing composition of any preceding claim, wherein the preservative composition comprises:Potassium Sorbate; and at least one preservative booster.

11. The rinse-free cleansing composition of claim 10, wherein the at least one preservative booster is selected from Methyl Propanediol, Caprylyl Glcyol, Hydroxyacetophenone, and mixtures thereof, preferably wherein the preservative booster is selected from Hydroxyacetophenone or a mixture of Methyl Propanediol and Caprylyl Glcyol.

12. The rinse-free cleansing composition of any preceding claim, wherein the surfactant composition comprises at least one surfactant selected from the group of: an anionic surfactant, an amphoteric surfactant, and a non-ionic surfactant.

13. The rinse-free cleansing composition of claim 12, wherein: the anionic surfactant is selected from at least one of Alkyl Ether Sulfates, Alkyl Sulfates, Acyl Isethionates, Alkyl Sulfonates, Sulfosuccinates, Alkylaryl Sulfonate, Sulfoacetates, Acyl Methyl Isethionates, Alkyl Ether Carboxylates, Ester Carboxylic Acids, Acyl Glycinates, Acyl Glutamates, Acyl Peptides, Fatty Acid Soaps, Acyl Sarcosinates, Sodium Methyl Acyl Taurates, Acyl Alaninate, SulfonatedSurfactant Polymer (Poly APG), Surfactants of the phosphoric acid class, Amino Acid derived surfactants, and other mild surfactants; the amphoteric surfactant is selected from at least one of Alkylamphoacetates, Alkyl Betaines, Amidopropyl Betaines, Sultaines, Acyl / Dialkyl Ethylenediamines and derivatives, N-Alkylamino acids; and the non-ionic surfactant is selected from at least one of Alkyl Polyglucosides, Alkyl Methyl Glucamides, Propypoxylated POE Ethers, Polymeric Ethers, Esters, Ethoxylated Glycerides and Alkoxylated alcohols.

14. The rinse-free cleansing composition of any preceding claim, wherein the surfactant composition comprises at least one, such as two or more or three or more, surfactant(s) selected from the group of: Disodium Coco-Glucoside Citrate, Sodium Methyl 2-Sulfolaurate, Disodium 2-sulfolaurate, Sodium Lauryl Sulfoacetate, Capryloyl / Caproyl Methyl Glucamide, and Sodium Lauroyl Sarcosinate.

15. The rinse-free cleansing composition of any preceding claim, wherein the surfactant composition comprises Disodium Coco-Glucoside Citrate and preferably at least one, such as at least two, of Sodium Methyl 2-Sulfolaurate, Di-sodium 2-sulfolaurate, Sodium Lauryl Sulfoacetate, Capryloyl / Caproyl Methyl Glucamide, and Sodium Lauroyl Sarcosinate.

16. The rinse-free cleansing composition of any preceding claim, wherein the surfactant composition comprises at least one of:Sodium Methyl 2-Sulfolaurate, preferably in an amount ranging 0.034% w / w to 1.02% w / w, such as 0.034% w / w to 0.34% w / w, of the total weight of the cleansing composition; andDi-sodium 2-sulfolaurate, preferably in an amount ranging 0.006% w / w to 0.18% w / w, such as 0.006% w / w to 0.06% w / w, of the total weight of the cleansing composition.

17. The rinse-free cleansing composition of any preceding claim, wherein the surfactant composition comprises at least one of:Sodium Methyl 2-Sulfolaurate, preferably in an amount ranging 0.009% w / w to 0.27% w / w, such as 0.009% w / w to 0.09% w / w, of the total weight of the cleansing composition,Disodium 2-Sulfolaurate, preferably in an amount ranging 0.001% w / w to 0.03% w / w, such as 0.001% w / w to 0.01% w / w, of the total weight of the cleansing composition; andSodium Lauryl Sulfoacetate, preferably in an amount ranging 0.01% w / w to 0.3% w / w, such as 0.01% w / w to 0.1% w / w, of the total weight of the cleansing composition.

18. The rinse-free cleansing composition of any of the preceding claims, wherein the at least one buffer agent is selected from at least one of: sodium hydroxide, lactic acid, citric acid, and sodium citrate.

19. The rinse-free cleansing composition of any of the preceding claims, wherein the at least one humectant is selected from at least one of: Glycerine, Propanediol, 1,2-Hexanediol, Pentylene Glycol, and Propylene Glycol, preferably wherein the at least one humectant is selected from at least one of Pentylene Glycol and Propanediol, especially Pentylene Glycol.

20. The rinse-free cleansing composition of any of the preceding claims, wherein the aqueous solvent is demineralized water.

21. The rinse-free cleansing composition of any of the preceding claims, wherein the solute part further comprises a fragrance agent selected from at least one of an essential oil blend, or a synthetic fragrance blend,preferably wherein the fragrance agent is present in an amount ranging 0.001% w / w to 3.000% w / w with respect to the total weight of the rinse- free cleansing composition.

22. The rinse-free cleansing composition of claim 21, wherein the essential oil blend is made from at least one of Ambrette, Angelica root, Angelica seed, Star Anise, Anise, Armoise, Basil, Bay, Benzoin, Bergamot, Bitter Orange, Buchu, Black Pepper, Cabreuva, Cajuput, Camphor, Cananga, Caraway, Cardamom, Carrot, Cascarilla, Cassia, Cedarwood, Celery, Chamomile Roman, Chamomile Blue, Cinnamon, Cistus, Citronella, Clary Sage, Clove, Clary Sage, Copaiba, Coriander, Corn mint Arvensis, Cubeb, Cypress, Davana, Dill, Elemi, Estragon, Tarragon, Eucalyptus, Fennel, Frankincense, Galbanum, Geranium, Ginger, Grapefruit, Guaiac wood, Gurjun, Hay, Helichrysum, Ho, Hop, Hyssop, Immortelle, Jasmine, Juniper Berry, Labdanum, Lemon Tea Tree Oil, Laurel, Lavandin, Lavender, Lemon, Lemon Petitgrain, Lemongrass, Lime, Litsea cubeba, Mace, Mandarin, May Chang, Marjoram, Mentha citrata, Myrrh, Myrtle, Neroli, Niaouli, Nutmeg, Oakmoss, Olibanum, Opoponax, Orange, Oregano, Origanum, Palmarosa, Parsley, Patchouli, Peppermint, Spearmint, Mint, Petitgrain, Peru oil, Pimento, Pine, Rose oil, Rosemary, Rosewood, Sage, Sandalwood, Schinus molle, Spikenard, Styrax resin, Valerian, Vetiver, Ylang, Tobacco absolute, Thyme, Tea Tree, Tagete, Tangerine, Red Thyme, Tolu, Tonka, Tree moss, Valerian, and Vanilla.

23. The rinse-free cleansing composition of any of the preceding claims, wherein the solute part further comprises at least one active agent, wherein the at least one active agent is selected from at least one of: Arginine, Creatine, Erythrite, Betaine, Allantoin, Biosaccharide Gum-1, Pullulan, Cyanocobalamin, Alpha-Glucan Oligosaccharide, Inulin, Sodium PCA, Aloe Vera, Aloe, Asparagus, Artichoke, Aronia, Arnica, Acai, Acacia, Avocado, Apricot, Apple, Peach, Raspberry, Raspberry Ketone, Kiwi,Papaya, Hops, Cucumber, Cherry, Strawberry, Apple Vinegar, Pink Grapefruit, Black Pepper, Barley, Calendula, Chamomile, Cocoa, Centella Asiatica, Coconut, Hibiscus, Juniper, Fennel, Fucus, Coffee, Edelweiss, Guarana, Ginger, Ginko Biloba, Black oat or Oat, Algae, Green tea. Eclipta, Pumpkin seed, Lime, Marshmallow, Olive, Pomegranate, Red Clover, Wheat, Mushroom, Mint, Orange Blossom Extract, Ivy, Quinoa, Fermented Skimmed Milk, Witch Hazel, Watermelon, Royal Jelly, Rosemary, Nettle, Sweet Almond, Soy, Levander, Tomato, Broccoli, Kale, Seaweed, Willow, Saw Palmetto, Quillaya Saponaria, Rice, Cotton and Turmeric extracts; preferably wherein the at least one active agent is present in an amount ranging 0.10% w / w to 5.00% w / w with respect to the total weight of the cleansing composition.

24. The rinse-free cleansing composition of any of the preceding claims, wherein the solute part further comprises at least one enhancement agent, wherein the enhancement agent is a non-ionic amylomer, and wherein the enhancement agent is preferably present in an amount ranging 0.50% w / w to 1.50% w / w with respect to the total weight of the cleansing composition.

25. The rinse-free cleansing composition of any of the preceding claims, wherein the solute part further comprises at least one chelation agent selected from at least one of Sodium Gluconate and Sodium Phytate, preferably in an amount ranging 0.001% w / w to 1.000% w / w with respect to the total weight of the cleansing composition.

26. The rinse-free cleansing composition of any of the preceding claims, wherein the solute part further comprises at least one thickening agent, wherein the at least one thickening agent is one of a natural thickening agent or a synthetic thickening agent, and is preferably present in an amount ranging 0.01% w / w to 5.00% w / w with respect to the total weight of the rinse-free cleansing composition.

27. The rinse-free cleansing composition of claim 26, wherein the natural thickening agent is selected from at least one of Acacia Senegal Gum, Ceratonia Siliqua Gum, Cellulose, Microcrystalline Cellulose, Hydroxyethyl Methylcellulose, Hydroxypropyl Methylcellulose, Cellulose Gum, Xanthan Gum, Diutan Gum, Hydroxyethyl cellulose, Gellan Gum, Carrageenan, Pectin, Succinoglycans, sodium magnesium fluorosilicate, and the synthetic thickening agent is selected from at least one of Acrylates, Carbomers, Acrylate / Alkyl Acrylate Cross polymers (Carbomer, Acrylates / C10-30 Alkyl Acrylate Cross polymer), Sodium Polyacrylate, Ammonium Acryloyldi methyltaurate / VP Copolymer, Sodium Polyacryloyldimethyl Taurate, Polyacrylic Acid, Sodium Carboxymethyl Starch.

28. The rinse-free cleansing composition of any of the preceding claims, comprising:0.02% w / w to 1.20% w / w with respect to the total weight of the rinse-free cleansing composition of at least one surfactant, preferably at least two surfactants, such as at least three, such as three or four surfactants, selected from the group of: Disodium Coco-Glucoside Citrate, Sodium Methyl 2-Sulfolaurate, Di-sodium 2-sulfolaurate, Sodium Lauryl Sulfoacetate, Capryloyl / Caproyl Methyl Glucamide, and Sodium Lauroyl Sarcosinate;1.00% w / w to 5.00% w / w with respect to the total weight of the rinse-free cleansing composition of at least one humectant selected from the group of: Glycerine, Propanediol, 1,2-Hexanediol, Pentylene Glycol, and Propylene Glycol;0.01% w / w to 0.10% w / w with respect to the total weight of the rinse-free cleansing composition of at least one buffer agent selected from the group of: sodium hydroxide, lactic acid, citric acid, and sodium citrate;0.10% w / w to 6.00% w / w with respect to the total weight of the rinse-free cleansing composition of at least one preservative or preservative booster selected from the group of Phenethyl Alcohol, Phenoxyethanol, Benzoic Acid, Benzyl Alcohol, Sodium Levulinate, Sodium Benzoate, Caprylyl Glycol, Sodium Salicylate, Sodium Anisate, Potassium Sorbate, Ethylhexylglycerin, Hydroxyacetophenone, Sorbic Acid, Dehydroacetic acid, Gluconolactone, Methylpropanediol, and Phenylpropanol;0.1% w / w to 6.0% w / w with respect to the total weight of the rinse- free cleansing composition of triethyl citrate; and optionally 0.001% w / w to 1.000% w / w with respect to the total weight of the cleansing composition of at least one chelation agent selected from the group of Sodium Gluconate and Sodium Phytate.

29. The rinse-free cleansing composition of any of the preceding claims, wherein the cleansing composition is at least one of: a hair care product, a cosmetic product, a cleansing product, a fragrance product, or a medicament.

30. The rinse-free cleansing composition of any of the preceding claims, wherein the composition is formulated as at least one of: a spray, a selffoamer, a wipe, or a gel.

31. The rinse-free cleansing composition of any of the preceding claims, wherein the cleansing composition has a pH within the range of 3.5 to 7.2, preferably 4.5 to 6.0 such as 4.5 to 5.5, and / or a specific gravity within the range of 0.98 to 1.02.

32. A dispensing unit, such as a spray or self-foamer, containing the rinse-free cleansing composition of any of the preceding claims.

33. Use of the rinse-free cleansing composition of any one of claims 1 to 31 to remove contaminants, such as dirt and grime, from a surface such as the skin or hair of a subject.

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