Mild liquid personal cleansing compositions

Abstract

The present invention provides a cleansing composition comprising 0.1 to 40 wt.% non-soap surfactant, 0.05 to 1.1 wt.% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, 0.05 to 5 wt.% starch and 5 to 80 wt.% water.

Description

[0001] MILD LIQUID PERSONAL CLEANSING COMPOSITIONS

[0002] Field of the invention

[0003] The present invention relates to mild liquid compositions and more particularly personal cleansing compositions. The present invention relates to the field of liquid cleansing compositions which are gentle and mild on skin and provide a moisturized end feel. More particularly, it relates to such compositions having starch and polymer.

[0004] Background of the invention

[0005] Skin is subject to deterioration through dermatological disorders, environmental abuse (wind, air conditioning, central heating.) or through the normal aging process (chronoaging) which may be accelerated by exposure of skin to sun (photoaging). In recent years the demand for cosmetic compositions and cosmetic methods for improving the appearance and condition of skin has grown enormously.

[0006] Many people are concerned with their skin quality and appearance and want to work on it. Dermatologists are also keen to ensure that cleansing products support the skin and help improve the quality of the skin. Essentially cleansing products should care for the skin and add back to the skin.

[0007] Most people consider skin health and appearance as one of the key indicators of their own beauty and health. This is affected by factors like age, hormonal changes, occurrence of acne and exposure to sunlight and pollution.

[0008] Therefore, there is always a need for a composition that works to improve the appearance of skin and it is a highly desired consumer demand to include the skin benefit agents in consumables that are already a part of daily cleansing routine and does not require any extra steps towards taking care of the skin.

[0009] Therefore a cleansing composition that caters to the timeless demand of skin improvement is need of the hour that is affordable and works with the skin enhancing it with continued use along with superior lather profile and skin sensory. There is a need for a skin cleansing composition which has fewer chemical dermatological actives, and yet provides enhanced skin benefits and desired sensory in use and post use and superior lather properties.

[0010] Summary of the invention

[0011] Personal cleansing compositions many a times have a dry after feel and need to be followed up with a moisturizing lotion. The present invention provides a composition that is mild and gentle on the skin and gives a smooth and moisturized after feel to the skin.

[0012] First aspect of the present invention provides cleansing composition comprising: i. 0.1 to 40 wt% non-soap surfactant; ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; iii. 0.05 to 5 wt% starch; and iv. 5 to 80 wt% water.

[0013] Second aspect of the present invention provides use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, iii. 5 to 80 wt% water; for providing better skin clarity and / or glow and radiance, as compared to the composition without starch.

[0014] Third aspect of the present invention provides use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. 0.1 to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, iii. 5 to 80 wt% water; for providing moisturization as compared to the composition without starch. Fourth aspect of the present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to the according to the first aspect, for providing better skin clarity and / or glow and radiance as compared to the composition without starch and acrylic polymer.

[0015] Fifth aspect of the present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1 .1 wt% acrylic polymer in a cleansing composition according to the according to the first aspect, for providing better moisturization as compared to the composition without starch and acrylic polymer.

[0016] Another aspect of the present invention provides a process for method of manufacturing a liquid personal cleansing composition according to the first aspect.

[0017] Another aspect of the present invention provides use of starch and polymer preferably acrylic polymer in liquid cleansing compositions for providing a moisturized effect.

[0018] These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention may be utilized in any other aspect of the invention.

[0019] The term "comprising" is meant not to be limiting to any subsequently stated elements but rather to encompass non-specified elements of major or minor functional importance. In other words the listed steps, elements or options need not be exhaustive. Whenever the words "including" or "having" are used, these terms are meant to be equivalent to "comprising" as defined above. In other words, the listed steps or options need not be exhaustive It is noted that the examples given in the description below are intended to clarify the invention and are not intended to limit the invention to those examples per se. Similarly, all percentages are weight / weight percentages unless otherwise indicated.

[0020] Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description and claims indicating amounts of material or conditions of reaction, physical properties of materials and / or use are to be understood as modified by the word "about". Numerical ranges expressed in the format "from x to y" are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format "from x to y", it is understood that all ranges combining the different endpoints are also contemplated.

[0021] It should be noted that in specifying any range of concentration or amount, any particular upper concentration can be associated with any particular lower concentration or amount.

[0022] For a more complete understanding of the above and other features and advantages of the invention, reference should be made to the following detailed description of preferred embodiments.

[0023] Detailed description of the invention

[0024] The present invention relates to aqueous skin cleansing compositions suitable for topical application for cleansing the human body, such as the skin and hair. In particular, it liquid cleansing compositions having starch and polymer which are gentle and mild on skin and provide a moisturized end feel.

[0025] The present invention provides a cleansing comprising: i. 0.1 to 40 wt% non-soap surfactant; ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; iii. 0.05 to 5 wt% starch; and iv. 5 to 80 wt% water.

[0026] It was seen that incorporation of starch in a liquid body wash composition has shown unexpected benefits. The unexpected benefits are in terms of improvement in overall skin sensory and lather profile at reduced surfactant level. Starch also works synergistically with the other composition components for improvements in parameters that eventually lead to higher order skin care benefits and improvement in overall skin feel and hydration. Starches in liquid surprisingly worked as a naturally derived renewable and safe alternative to silicone in terms of skin feel and smooth sensory. It was also a surprising finding how starch worked synergistically with certain polymers to bring about skin benefits such as moisturization, glow and radiance and skin clarity while being mild and gentle to the skin.

[0027] It was also observed that synergistic combination of starch and polymers in surfactantbased cleansing systems helps cleansing process and allows efficient cleansing in lower surfactant level, with additional skin benefit. This would bring down dependency on surfactant for consumer desired benefits and provide a cleansing composition that doesn’t require many dermatological actives for delivering skin benefits and which has less surfactant and are less drying for the skin.

[0028] For the purposes of this invention, round and oval particles not only include geometrically round and oval particles but also encompass particles having smooth morphology which are not irregular on the surface.

[0029] For the purposes of this invention the term ‘native’ when used for starch means that no chemical modification has been done to starch.

[0030] Cleansing Composition

[0031] The present invention provides a cleansing comprising: 0.1 to 40 wt% non-soap surfactant; 0.05 to 1 .1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; 0.05 to 5 wt% starch; and 5 to 80 wt% water.

[0032] The cleansing composition of the present invention provides benefits such as gentleness, mildness and moisturizing benefit.

[0033] It is preferred in the composition of the present invention that the starch is pregelatinized native ungelatinized, partially gelatinized or partially hydrolyzed. It is most preferred that starch is in ungelatinized form.

[0034] It is preferred in the composition of the present invention that particle size of the starch is in the range of 2-50pm.

[0035] It is preferred in the composition of the present invention that the polymer is an acrylic polymer. It is preferred in the composition of the present invention that the non-soap surfactant is selected from the group of anionic surfactant, amphoteric surfactant, zwitterionic surfactant, non-ionic surfactant and mixtures thereof.

[0036] It is preferred in the composition of the present invention that the composition comprises 0.1 to 3 wt% chelating agent. It is preferred that the chelating agent is selected from the group of Ethylene Diamine Tetra Acetic acid (EDTA), or Diethylene Triamine Penta Acetic acid (DTPA), sodium gluconate, sodium citrate and mixtures thereof.

[0037] It is preferred in the composition of the present invention that the composition comprises a preservative in the range of 0.1 to 5 wt% by weight of the composition. It is preferred that the preservative is benzoic acid or derivative, paraben derivative, or a sorbate derivative or mixtures or combinations thereof. It is further preferred that the preservative is selected from sodium benzoate, benzoic acid, potassium sorbate, methylparaben, ethylparaben, propylparaben, butylparaben and heptyl paraben, combinations or mixtures thereof.

[0038] Non-soap surfactant

[0039] It is preferred that the cleansing composition comprises 0.1 to 40 wt%, more preferably in the range of 0.5 to 38 wt%, further, more preferably in the range of 1 to 35 wt% and most preferably in the range of 2.5 to 30 wt% of non-soap surfactant by weight of the cleansing composition. The compositions of the present invention may contain anionic surfactants, non-ionic surfactants, cationic surfactants or amphoteric surfactants.

[0040] The synthetic anionic detergent active which may be used in the invention may be aliphatic sulfonates, such as a primary alkane (e.g., C8-C22) sulfonate, primary alkane (e.g., C8-C22) disulfonate, C8-C22 alkene sulfonate, C8-C22 hydroxyalkane sulfonate or alkyl glyceryl ether sulfonate (AGS); or aromatic sulfonates such as alkyl benzene sulfonate. The anionic may also be an alkyl sulfate (e.g., C12-C18 alkyl sulfate) or alkyl ether sulfate (including alkyl glyceryl ether sulfates). Among the alkyl ether sulfates are those having the formula:

[0041] RO(CH2CH2O)nSO3M wherein R is an alkyl or alkenyl having 8 to 22 carbons, preferably 12 to 18 carbons, n has an average value of equal to or greater than 1 .0, preferably lesser than 3; and M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium. Ammonium and sodium lauryl ether sulfates are preferred.

[0042] The anionic may also be alkyl sulfosuccinates (including mono- and dialkyl, e.g., C6-C22 sulfosuccinates); alkyl and acyl taurates, alkyl and acyl sarcosinates, sulfoacetates, C8-C22 alkyl phosphates, alkyl phosphate esters and alkoxyl alkyl phosphate esters, acyl lactates, C8-C22 monoalkyl succinates and maleates, sulphoacetates, alkyl glucosides and acyl isethionates, and the like.

[0043] Sulfosuccinates may be monoalkyl sulfosuccinates having the formula: R4O2CCH2CH(SO3M)CO2l\ / l; and amide-MEA sulfosuccinates of the formula;

[0044] R4CONHCH2CH2O2CCH2CH(SO3M)CO2^ wherein R4ranges from C8-C22 alkyl and M is a solubilizing cation.

[0045] Sarcosinates are generally indicated by the formula:

[0046] R1CON(CH3)CH2CO2M, wherein R1ranges from C8-C20 alkyl or alkenyl (or better yet C8-C20 carbon chains) and M is a solubilizing cation.

[0047] Taurates are generally identified by formula:

[0048] R2CONR3CH2CH2SO3M wherein R2ranges from C8-C20 alkyl, R3ranges from H or C1-C4 alkyl and M is a solubilizing cation.

[0049] The inventive cleansing composition may contain Cs-Cis acyl isethionates. These esters are prepared by reaction between alkali metal isethionate with mixed aliphatic carboxylic acids having from 6 to 18 carbon atoms and an iodine value of less than 20. At least 75% of the mixed carboxylic acids have from 12 to 18 carbon atoms and up to 25% have from 6 to 10 carbon atoms.

[0050] The acyl isethionate may be an alkoxylated isethionate such as is described in llardi et al., U.S. Patent No. 5,393,466, titled “Fatty Acid Esters of Polyalkoxylated isethonic acid; issued February 28, 1995; hereby incorporated by reference. This compound has the general formula:

[0051] R C-O(O)-C(X)H-C(Y)H2-(OCH-CH2)m-SO3M wherein R is an alkyl group having 8 to 18 carbons, m is an integer from 1 to 4, X and Y are hydrogen or an alkyl group having 1 to 4 carbons and M+is a monovalent cation such as, for example, sodium, potassium or ammonium.

[0052] The most preferred anionic surfactants for the compositions of the present invention are selected from the group of sulfonic acids, their salts; alkyl ether sulfates; mixtures and combinations thereof. Most preferable anionic surfactants may include sodium lauryl ether sulfate, its derivatives such as ethylene oxide derivatives and the likes.

[0053] It is preferred that the cleansing composition comprises anionic surfactant in the range of 0.1 to 40 wt%, more preferably in the range of 0.5 to 38 wt%, further more preferably in the range of 1 to 35 wt% and most preferably in the range of 2.5 to 30 wt% of nonsoap surfactant by weight of the composition.

[0054] Preferably the cationic surfactants for the purposes of the present invention are, for example, quarternary surfactants, these include, but are not limited to: benzalkonium chloride, alkyl betaine, alkylamidopropyl betaine, alkyl- amidopropylhydroxysultaine alkylamines, alkylimidazoles and ethoxylated amines. It is preferred that the cleansing composition comprises cationic surfactant in the range of-1 to 25 wt%, more preferably in the range of 8 to 23 wt%, further, more preferably in the range of 10 to 22wt% and most preferably in the range of 11 to 21wt% by weight of the composition.

[0055] Preferably the amphoteric surfactants for the purposes of the present invention are, for example, acyl I dialkylethylene diamines, for example sodium acylamphoacetate, Cocamidopropyl betaine (CAPB), disodium acyl amphodipropionate, disodium alkylamphodiacetate, sodium acrylamphohydroxypropyl sulfonate, disodium acrylamphodiacetate and sodium acrylamphopropionate, N-alkylamino acids, for example aminopropyl alkylglutamide, alkylaminopropionic acid, sodium alkylimidodipropionate and lauroamphocarboxyglycinate. It is preferred that the cleansing composition comprises amphoteric surfactant in the range 0.1 to 40 wt%, more preferably in the range of 0.5 to 38 wt%, further, more preferably in the range of 1 to 35 wt% and most preferably in the range of 2.5 to 30 wt% of non-soap surfactant by weight of the composition. Preferably, the compositions will comprise a combination of anionic and amphoteric Surfactant (e.g., betaine), especially when anionic comprises 50% or greater of such mixture of synthetics.

[0056] One or more nonionic surfactant(s) may be used in the cleansing composition of the present invention as a co-surfactant. Nonionic surfactants are preferably used at levels as low as 0.1 , 0.5 or 1% by wt. and at levels as high as 30, 35 or 40% by wt. The nonionic surfactants which may be used include in particular the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides or alkylphenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Specific nonionic detergent compounds are alkyl (C6-C22) phenols ethylene oxide condensates, the condensation products of aliphatic (Cs-Cis) primary or secondary linear or branched alcohols with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other so-called nonionic detergent compounds include long chain tertiary amine oxides, long chain tertiary phosphine oxides and dialkyl sulphoxide, and the like.

[0057] Preferred nonionic surfactants include alkylpolyglucosides and carboxylic acid / alcohol ethoxylates having the following structures: a) HOCH2(CH2)n(CH2CH2O)x H or b) HOOC(CH2)m(CH2CH2O)y H; where m, n are independently < 18; and x, y are independently > 1 ; preferably m, n are independently 6 to 18; x, y are independently 1 to 30; c) HOOC(CH2)i-CH=CH-(CH2)k(CH2CH2O)z H; where i, k are independently 5 to 15; and z is independently 5 to 50; preferably i, k are independently 6 to 12; and z is independently 15 to 35.

[0058] The nonionic may also include a sugar amide, such as a polysaccharide amide. Specifically, the surfactant may be one of the lactobionamides described in U.S. Patent No. 5,389,279 to Au et al. titled “Compositions Comprising Nonionic Glycolipid Surfactants issued February 14, 1995; which is hereby incorporated by reference or it may be one of the sugar amides described in Patent No. 5,009,814 to Kelkenberg, titled “Use of N-Poly Hydroxyalkyl Fatty Acid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems” issued April 23, 1991 ; hereby incorporated into the subject application by reference.

[0059] Preferably the non-ionic surfactants for the purposes of the present invention are, for example, Alkanolamides, such as Cocamide MEA DEA / MIPA, esters produced by the esterification of carboxylic acids with ethylene oxide, glycerol, sorbitan or other alcohols, ethers, for example ethoxylated alcohols, ethoxylated lanolin, ethoxylated poly-siloxanes, propoxylated POE ethers and alkyl polyglycosides such as lauryl glucoside, decyl glucoside and cocoglucoside. It is preferred that the cleansing composition comprises nonionic surfactant in the range of 0.1 to 40 wt%, more preferably in the range of 0.5 to 38 wt%, further, more preferably in the range of 1 to 35 wt% and most preferably in the range of 2.5 to 30 wt% of non-soap surfactant by weight of the cleansing composition.

[0060] Suitable surfactants that may be used in the compositions disclosed herein may comprise one or more of sodium cocoyl isethionate, Sodium Lauryl Sulfate, disodium lauryl sulfosuccinate, lauryl glucoside, myristyl glucoside, decyl glucoside, sodium sulfate, sodium silicate, Cocamidopropyl betaine, sodium coco sulfate, sodium lauryl sulfate. In one embodiment, the surfactant may comprise sodium cocoyl isethionate. In another embodiment, the surfactant may comprise disodium lauryl sulfosuccinate In a further embodiment, the surfactant may comprise a mixture of lauryl glucoside, myristyl glucoside, sodium sulfate, sodium silicate, and sodium coco sulfate). In yet another embodiment, the surfactant may comprise sodium lauryl sulfate. Suitable surfactants are not limited to the ones enumerated herein and may include other surfactants that are in powder form prior to their incorporation into the composition and are water-soluble to maximize the cleansing potential of the composition.

[0061] It is most preferred that the composition of the present invention comprises surfactant selected from the group of anionic, non-ionic and amphoteric surfactants or mixtures thereof.

[0062] Starch

[0063] The cleansing composition of the present invention comprises starch in the range of from 0.05 to 5 wt%, more preferably from 0.5 to 4.8 wt% and most preferably from 1 to 4.5 wt% by weight of the cleansing composition. Starch (a polymer of glucose) is polysaccharide used as a storage polysaccharide in plants, being found in the form of both amylose and the branched amylopectin. In animals, the structurally similar glucose polymer is the more densely branched glycogen, sometimes called "animal starch".

[0064] In another aspect of the present invention starch may be modified starch or native starch. It is most preferred that the starch is native starch.

[0065] Suitable starch materials include natural starch (from corn, wheat, rice, potato, tapioca and the like), pre-gelatinized starch, various physically and chemically modified starch and mixtures thereof. By the term natural starch is meant starch which has not been subject to chemical or physical modification - also known as raw or native starch.

[0066] A preferred starch is natural or native starch from maize (corn), cassava, wheat, potato, rice and other natural sources of it. Raw starch with different ratio of amylose and amylopectin: e.g. maize (25% amylose); waxy maize (0%); high amylose maize (70%); potato (23%); rice (16%); sago (27%); cassava (18%); wheat (30%) pea (35% amylose) and others. The raw starch can be used directly or modified during the process of making the liquid personal cleansing composition such that the starch becomes gelatinized.

[0067] It is preferred in the composition of the present invention that the starch is pregelatinized native ungelatinized, partially gelatinized or partially hydrolyzed.

[0068] It is most preferred to use ungelatinized or pre-gelatinized starch. It is further preferred to use starch that is native and not chemically modified.

[0069] Another suitable starch is pre-gelatinized, which is starch that has been gelatinized before it is added as an ingredient in the present liquid personal cleansing compositions. Various forms are available that will gel at different temperatures, e.g., cold water dispersible starch.

[0070] It is preferred that the starch is in a suspended state in the liquid composition of the present invention and most preferably in concentrations and form in which it does not act primarily act as a thickening agent. It is further preferred that starch is used in its ungelatinized form. It is known in the industry that ungelatinized form of starch does not function as a thickening agent. It is preferred that when particle size (D50) of starch ranges between 2-50pm more preferably 4-45pm and most preferably 5-35pm while particle shapes can be smooth, oval, oblate spheroid or polygonal and preferably smooth oval / spheroid. It is most preferred that the native starch of particle size in the range of 2-50pm, more preferably 4-45pm, and most preferably 5-35pm is used. D50 is a particle size measurement indicating diameter at which 50% of particles are smaller and 50% are larger in a distribution.

[0071] Electrolyte

[0072] The cleansing composition of the present invention may comprise an electrolyte. The electrolyte for the purposes of the present invention may include inorganic salts (e.g., sodium chloride, potassium chloride) as well as organic salts (e.g., sodium citrate). In addition to the above-mentioned chloride and citrate salts, other salts include phosphates, sulfates and other halogen ion salts. The counter ions of such salts can be sodium or other monovalent cations as well as di- and trivalent cations.

[0073] The cleansing composition may optionally comprise electrolytes. When present the electrolytes may range from 0.01 to 5 wt% more preferably from 0.1 to 4.5 wt% and most preferably from 0.15 to 4.5 wt% by weight of the liquid cleansing composition. These wt% values are inclusive of the case when electrolytes function as rheology modifying agents. pH modulating agent

[0074] The composition of the present invention preferably comprises a pH modulating agent. When pH modulating agent is present in the composition of the present invention, it is present in the range of from 0.01 to 1wt%, preferably 0.05 to 0.8 wt%, more preferably 0.08 to 0.7 wt% and most preferably 0.09 to 0.6 wt% by weight of the composition of the present invention.

[0075] The pH modulating agent is an ingredient which is responsible to modulate the existing pH of the composition.

[0076] The pH modulating agent is selected so as to maintain the pH of the composition in the range of 4 to 7 more preferably 4.5 to 7 and most preferably 4.5 to 5.7. The pH modulating agent for the present invention may be an acid or a salt. It is preferred that the pH modulating agent is an acid such as acetic acid, citric acid, lactic acid, gluconic acid, glycolic acid, malic acid, mandelic acid, tartaric acid or amino acids or the likes.

[0077] When the pH modulating agent is a salt may be sodium bicarbonate, potassium carbonate, calcium hydroxide, potassium hydroxide, sodium carbonate, potassium bicarbonate, sodium hydroxide or a combination thereof. In various embodiments, the pH modulating agent is sodium bicarbonate.

[0078] Chelating Agent

[0079] The cleansing composition of the present invention comprises a chelating agent. It is preferred that the chelating agent in the cleansing composition is present in the range of 0.01 to 3 wt% by weight of the cleansing composition, more preferably in the range of 0.02 to 2.5 wt% by weight of the cleansing composition, and most preferably in the range of 0.05 to 1 .5 wt% by weight of the cleansing composition.

[0080] It is preferred that the chelating agent in the cleansing composition is present at least 0.01 wt%, more preferably at least 0.02 wt%, and most preferably at least 0.05 wt% by weight of the cleansing composition.

[0081] It is preferred that the chelating agent in the cleansing composition is present at most 3 wt%, more preferably at most 2.5 wt%, further preferably at most 2 wt% and most preferably at most 1.5 wt% by weight of the cleansing composition.

[0082] The preferred chelating agents are as follows (names followed by their abbreviation in parenthesis):

[0083] Ethylene Diamine Tetra Acetic acid (EDTA), Disodium ethylenediaminetetraacetic acid, Diethylene Triamine Penta Acetic acid (DTPA), Ethane-1 -hydroxy-1 ,1-diphosphonate (EHDP), Ethylene Diamine-N,N'-Disuccinate (EDDS), Nitrilo Triacetic Acid (NTA), Sodium Imino Disuccinate (IDS), Ethylene Glycol-bis-(2-aminoethyl)-N,N,N', N'-Tetra Acetic acid (EGTA), Methyl Glycine Diacetic Acid (MGDA), N-(2-hydroxyethyl) Ethylene Diamine N,N',N'-Thacetic acid) (HEDTA), Ethylene Diamine Tetra Methylene Phosphonic acid (EDTMP), Diethylene Thamine-Penta-Methylene Phosphonic acid (DTPMP), Glutamic acid-N,N-Diacetic Acid (GLDA), Cyclohexane-1 ,2-Diamine- N,N,N',N'-Tetra-Acetic Acid (CDTA), 1 ,3-Propylenediamine Tetra-Acetic Acid (PDTA), Ethylene Diamine Triacetic Acid (EDTA), L-hydroxy Imino Disuccinic acid (L-IDS), Trisodium N-Carboxyethyl Imino Succinate (CEIS), Citric Acid, Sodium Tripolyphosphate (STP), Thethylene Tetramine Hexaacetic Acid (TTHA). Other preferred chelating agents are Trisodium Ethylene Diamine Disuccinate, Tetra-sodium-lmino disuccinate, Glutamic acid-N,N diacetic acid tetra sodium salt, 2-hydroxyethyl iminodiacetic acid, Sodium salt (disodium ethanol diglycinate), Tetrasodium 3-hydroxy-2,2 imino disuccinate, Trisodium methylglycine diacetic acid, L- Aspartate-N,N-diacetic acid tetrasodium salt. The more preferred chelating agents are salt of Ethylene Diamine Tetra Acetic acid (EDTA) and salt of Diethylene Thamine Penta Acetic acid (DTPA). Preferred salts of EDTA are disodium Ethylene Diamine Tetra Acetic acid and tetrasodium Ethylene Diamine Tetra Acetic acid. Preferred salt of DTPA is the pentasodium Diethylene Thamine Penta Acetic acid.

[0084] It is most preferred that the chelating agent suitable for the compositions of the present invention are selected from the group of Ethylene Diamine Tetra Acetic acid (EDTA), or Diethylene Triamine Penta Acetic acid (DTPA), their derivatives and combinations, mixtures thereof. The EDTA derivative is selected from tetrasodium EDTA, trisodium EDTA, disodium EDTA, and combinations thereof. The DTPA derivative is selected from tetrasodium DTPA, trisodium DTPA, disodium DTPA, and combinations thereof.

[0085] Preservative

[0086] The composition of the cleansing composition of the present invention comprises a preservative. It is preferred that the preservative in the cleansing composition is present in the range of 0.01 to 3wt% by weight of the cleansing composition, more preferably in the range of 0.02 to 2wt% by weight of the cleansing composition, and most preferably in the range of 0.05 to 1 wt% by weight of the cleansing composition.

[0087] Very useful examples of the preservatives suitable for the compositions of the present inventions, but are not limited to, chlorite components, benzoic acid components, sorbic acid components and mixtures thereof.

[0088] Other preferred preservatives include but not limited to commonly used in cosmetics, such as dibromdicyanobutane (2-bromo-2-bromomethylglutarodinitrile), phenoxyethanol, 3-lod-2-propinylbutylcarbamate, 2-bromo-2-nitro-propane-1 , 3-diol, imidazolidinyl urea, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-chloroacetamide, benzalkonium chloride, sodium benzoate, benzyl alcohol.

[0089] It is particularly preferred according to the invention if sodium benzoate, sodium salicylate, methyldibromoglutaronitrile, phenoxyethanol and combinations thereof are used as preservatives.

[0090] Water

[0091] The cleansing composition of the present invention comprises water in the range of 5 to 80 wt% water, more preferably 10 to 75 wt% and and most preferably from 15 to 70 wt% by weight of the composition. The composition of the present invention is primarily an aqueous composition. pH

[0092] It is preferred that the pH of the compositions of the present invention ranges from 4 to 7 more preferably 4.5 to 6.9.

[0093] The pH of a solution is expressed as the negative logarithm of the hydrogen ion activity which is related to a millivolt potential of the pH indicating electrode. This electrode is calibrated with standard buffer mixtures whose pH values lie on either side (acidic & basic) of that of the solution which is being measured. About 1 gm of the cleansing composition is weighed in a beaker & made up to 100 grams by adding distilled water. 25°C and pH is measured.

[0094] Polymer

[0095] The composition of the present invention comprises a polymer in the range of 0.05 to 1.1 wt% by weight of the composition of the present invention, the polymer selected from the group consisting of acrylic polymers, cellulosic polymers. These polymers are preferably suspending polymers which may be water soluble / dispersible polymers. These polymers can help to structure liquid formulations, suspend particulate matters in liquid formulations and slow down or prevent aggregation and sedimentation of undissolved particulate matters. These polymers can be cationic, anionic, amphoteric or nonionic types with molecular weights higher than 100,000 Dalton. Amount of the polymers, may range from 0.05 to 1.1% by weight of the composition. It is preferred that the polymers are present in the range of 0.05 to 1.1 wt%, preferably from 0.1 to 1.05%, furthermore preferably 0.15 to 0.95% by weight of the cleansing composition.

[0096] Examples of water soluble / or dispersible polymers and suspending polymers include the carbohydrate gums such as cellulose gum, microcrystalline cellulose, cellulose gel, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethylcellulose, methyl cellulose, ethyl cellulose, guar gum, gum karaya, gum tragacanth, gum arabic, gum acacia, gum agar, xanthan gum and mixtures thereof; alkali swellable acrylic polymers such as crosslinked acrylate copolymers, polyacrylate crosspolymers; polyacrylate crosspolymers (Sepimax zen), lightly cross-linked acrylate copolymer (Carbopol Aqa SF01 , Carbopol Aqa SF02, Rheostule 85L, Rheostyle 100), hydroxypropyl methylcellulose (and) cellulose gum (and) xanthan gum (TEXTURE PURE SA ), Amaze XT(De hydroxanthan gum). Cationic cellulose derivatives are cationic starch derivatives, and cationic guar gum derivatives, cationic polyacrylamide, cationic galactomanan.

[0097] In a highly preferred aspect, the polymer for the present invention is acrylic polymer.

[0098] The acrylic polymer may be hydrophobically modified, a homo polymer, a copolymer, or a cross polymer which may be an acrylic polymer, a partially neutralized acrylic polymer or an acrylic polymer. Commercially available polymer of these classes which may be used include Carbopol Aqua SF polymer from Lubrizol, Carbopol SC-200 polymer also from Lubrizol, or Acusol 445 G- polymer from Dow.

[0099] Suitable agents include acrylate containing homo and copolymers such as the crosslinked poly acrylates available under the CARBOPOL trade name, the hydrophobically modified cross linked polyacrylates available under the AQUA trade name, and the PEMULEN trade name (all sold by Lubrizol Company, Wickliffe, Ohio), the alkali swellable acrylic latex polymers sold by Rohm and Haas (Philadelphia, Pa.) under the ACUSOL or ACULYN trade names and Synthalen 400 (available from 3V located in Hackensack, N.J.).

[0100] When present, acrylic polymer is included in 0.05 to 1.1 wt%, preferably from 0.1 to 1.05%, furthermore preferably 0.15 to 0.95% by weight of the cleansing composition. Soap

[0101] The liquid cleansing composition of the present invention may comprise about 0.1 to 10 wt% of soap, more preferably 0.5 to 9 wt% and most preferably about 1 to 8wt% of soap by weight of the cleansing composition. It is preferable that the cleansing composition has 1 .5 to 7 wt% of total fatty matter (TFM).

[0102] The term soap means salts of fatty acids in which the accompanying cation may be an alkali metal, alkaline earth metal or ammonium ion, preferably an alkali metal. Preferably, the cation is sodium or potassium. The soap may be saturated or unsaturated and it depends on the nature of the corresponding fatty acid and / or oil used for saponification.

[0103] Emollients

[0104] The term “emollient” is defined as a substance which softens or improves the elasticity, appearance, and youthfulness of the skin by either increasing its water content, adding, or replacing lipids and other skin nutrients; or both, and keeps it soft by retarding the decrease of its water content.

[0105] Moisturizers that also are Humectants such as polyhydric alcohols, e.g. glycerin and propylene glycol, and the like; and polyols such as the polyethylene glycols such as Polyox WSR N-60K (PEG-45M) and the like are used in a preferred embodiment of the invention. Humectants are preferably used at a minimum of 0.5, 2.5 or 5 % by wt. and a maximum of 15, 20 or 25% by wt.

[0106] Hydrophobic emollients are used in a preferred embodiment of the invention. Preferred are hydrophobic emollient(s) with weight average particle sizes below either 1000 or 500 microns in diameter and are defined herein as “finely dispersed oils”. These emollients are preferably used at a minimum of 0.5, 2.5 or 5 % by wt. and a maximum of 15, 20 or 25% by wt.

[0107] Suitable hydrophobic emollients include but are not limited to the following:

[0108] (a) silicone oils and modifications thereof such as linear and cyclic polydimethylsiloxanes; amino, alkyl, alkylaryl, and aryl silicone oils;

[0109] (b) fats and oils including natural fats and oils (triglycerides) such as jojoba, soybean, sunflower, rice bran, avocado, almond, olive, sesame, persic, castor, coconut, mink oils; moringa oil; cacao fat; beef tallow, lard; hardened oils obtained by hydrogenating the aforementioned oils; and synthetic mono, di and triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride;

[0110] (c) waxes such as carnauba, spermaceti, beeswax, lanolin, and derivatives thereof;

[0111] (d) hydrophobic plant extracts;

[0112] (e) hydrocarbons such as petrolatum, polybutene, liquid paraffins, microcrystalline wax, ceresin, squalene, pristan and mineral oil;

[0113] (f) higher alcohols such as lauryl, cetyl, stearyl, oleyl, behenyl, cholesterol and 2-hexydecanol alcohol;

[0114] (g) esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol monostearate, glycerol distearate, glycerol tristearate, alkyl lactate, alkyl citrate and alkyl tartrate;

[0115] (h) essential oils and extracts thereof such as mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, Citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene and terpenoid oils;

[0116] (i) mixtures of any of the foregoing components, and the like.

[0117] Benefit Agents

[0118] In addition to the ingredients described earlier, preferred embodiments of the cleansing compositions may also include other optional and preferred ingredients for their known benefits. The type and content will largely depend on the nature and type of cleansing composition as well as general principles of composition science. Other optional compositions include one or more skin benefit agents. The term "skin benefit agent" is defined as a substance which softens or improves the elasticity, appearance, and youthfulness of the skin (stratum corneum) by either increasing its water content, adding, or replacing lipids and other skin nutrients; or both, and keeps it soft by retarding the decrease of its water content. Included among the suitable skin benefit agents are emollients, including, for example, hydrophobic emollients, hydrophilic emollients, or blends thereof. Water-soluble skin benefit agents may optionally be formulated into the liquid compositions of the invention. A variety of water-soluble skin benefit agents can be used and the level can be from 0 to 50% but preferably from 1 to 30% by weight of the composition. These materials include, but are not limited to, polyhydroxy alcohols. Preferred water soluble skin benefit agents are glycerin, sorbitol and polyethylene glycol.

[0119] Water-insoluble skin benefit agents may also be formulated into the compositions as conditioners and moisturizers. Examples include silicone oils; hydrocarbons such as liquid paraffins, petrolatum, microcrystalline wax, and mineral oil; and vegetable triglycerides such as sunflower seed and cottonseed oils.

[0120] Preservatives can also be added into the compositions to protect against the growth of potentially harmful microorganisms. Suitable traditional preservatives for compositions of this invention are alkyl esters of para-hydroxybenzoic acid. Other preservatives which have more recently come into use include hydantoin derivatives, propionate salts, and a variety of quaternary ammonium compounds. Particularly preferred preservatives are phenoxyethanol, methyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate and benzyl alcohol. The preservatives should be selected having regard for the use of the composition and possible incompatibility between the preservatives and other ingredients. Preservatives are preferably employed in amounts ranging from 0.01 % to 2% by weight of the composition.

[0121] A variety of other optional materials may be formulated into the compositions. These may include: antimicrobials; scrub and exfoliating particles such as polyethylene and silica or alumina; cooling agents such as menthol; skin calming agents such as aloe vera; and colorants. Shower gel or Body wash may contain particles that are greater than 50 pm in average diameter that help remove dry skin. Not being bound by theory, the degree of exfoliation depends on the size and morphology of the particles. Large and rough particles are usually very harsh and irritating. Very small particles may not serve as effective exfoliants. Such exfoliants used in the art include natural minerals such as silica, talc, calcite, pumice, tricalcium phosphate; seeds such as rice, apricot seeds, etc; crushed shells such as almond and walnut shells; oatmeal; polymers such as polyethylene and polypropylene beads, flower petals and leaves; microcrystalline wax beads; jojoba ester beads, and the like. These exfoliants come in a variety of particle sizes and morphology ranging from micron sized to a few mm. They also have a range of hardness. Some examples are talc, calcite, pumice, walnut shells, dolomite and polyethylene.

[0122] Advantageously, active agents other than skin conditioning agents defined above may be added to the composition. These active ingredients may be advantageously selected from bactericides, vitamins, anti-acne actives; anti-wrinkle, anti-skin atrophy and skin repair actives; skin barrier repair actives; non-steroidal cosmetic soothing actives; artificial tanning agents and accelerators; skin lightening actives; sunscreen actives; sebum stimulators; sebum inhibitors; anti-oxidants; protease inhibitors; skin tightening agents; anti-itch ingredients; hair growth inhibitors; 5-alpha reductase inhibitors; desquamating enzyme enhancers; anti-glycation agents; or mixtures thereof; and the like.

[0123] These active agents may be selected from water-soluble active agents, oil soluble active agents, pharmaceutically acceptable salts and mixtures thereof. The term "active agent" as used herein, means personal care actives which can be used to deliver a benefit to the skin and / or hair and which generally are not used to confer a skin conditioning benefit, such are delivered by emollients as defined above. The term "safe and effective amount" as used herein, means an amount of active agent high enough to modify the condition to be treated or to deliver the desired skin care benefit, but low enough to avoid serious side effects. The term "benefit," as used herein, means the therapeutic, prophylactic, and / or chronic benefits associated with treating a particular condition with one or more of the active agents described herein. What is a safe and effective amount of the active agent(s) will vary with the specific active agent, the ability of the active to penetrate through the skin, the age, health condition, and skin condition of the user, and other like factors.

[0124] A wide variety of active agent ingredients are useful for the compositions of the present inventions and include those selected from anti-acne actives, anti-wrinkle and anti-skin atrophy actives, skin barrier repair aids, cosmetic soothing aids, topical anesthetics, artificial tanning agents and accelerators, skin lightening actives, antimicrobial and antifungal actives, sunscreen actives, sebum stimulators, sebum inhibitors, antiglycation actives and mixtures thereof and the like.

[0125] Anti-acne actives can be effective in treating acne vulgaris, a chronic disorder of the pilosebaceous follicles. Non limiting examples of useful anti-acne actives include the keratolytics such as salicylic acid (o-hydroxybenzoic acid), derivatives of salicylic acid such as 5-octanoyl salicylic acid and 4 methoxysalicylic acid, and resorcinol; retinoids such as retinoic acid and its derivatives (e.g., cis and trans); sulfur-containing D and L amino acids and their derivatives and salts, particularly their N-acetyl derivatives, mixtures thereof and the like.

[0126] Skin barrier repair actives are those skin care actives which can help repair and replenish the natural moisture barrier function of the epidermis. Non limiting examples of skin barrier repair actives include lipids such as cholesterol, ceramides, sucrose esters and pseudo-ceramides as described in European Patent Specification No. 556,957; ascorbic acid; biotin; biotin esters; phospholipids, mixtures thereof, and the like.

[0127] Artificial tanning actives can help in simulating a natural sun tan by increasing melanin in the skin or by producing the appearance of increased melanin in the skin. Non limiting examples of artificial tanning agents and accelerators include dihydroxyacetaone; tyrosine; tyrosine esters such as ethyl tyrosinate and glucose tyrosinate; mixtures thereof, and the like.

[0128] Skin lightening actives can actually decrease the amount of melanin in the skin or provide such an effect by other mechanisms. Non limiting examples of skin lightening actives useful herein include aloe extract, alpha-glyceryl-L-ascorbic acid, aminotyrosine, ammonium lactate, glycolic acid, hydroquinone, 4 hydroxyanisole, 4 alklyl resorcinols including ER, BR, HR, phenethyl resorcinol; thiamidol; mixtures thereof, and the like; Vitamin C and its oil and water soluble derivatives; Vitamin E and its oil and water soluble derivatives; Vitamin B3, Vitamin B series, hydroxy fatty acids including 12, hydroxystearic, 10 -hydroxy stearic, 10-hydroxy palmitic; and mixtures.

[0129] Also useful are sunscreen actives. Non limiting examples of sunscreens which are useful in the compositions of the present invention are those selected from the group consisting of octyl methoxyl cinnamate (Parsol MCX) and butyl methoxy benzoylmethane (Parsol 1789), 2-ethylhexyl p-methoxycinnamate, 2-ethylhexyl N,N-dimethyl-p-aminobenzoate, p-aminobenzoic acid, 2-phenylbenzimidazole-5sulfonic acid, oxybenzone, mixtures thereof, and the like.

[0130] Also useful are protease inhibitors. Protease inhibitors can be divided into two general classes: the proteinases and the peptidases. Proteinases act on specific interior peptide bonds of proteins and peptidases act on peptide bonds adjacent to a free amino or carboxyl group on the end of a protein and thus cleave the protein from the outside. The protease inhibitors suitable for use in the inventive personal toilet bar compositions include, but are not limited to, proteinases such as serine proteases, metalloproteases, cysteine proteases, and aspartyl protease, and peptidases, such as carboxypepidases, dipeptidases and aminopepidases, mixtures thereof and the like.

[0131] Other useful active ingredients are skin tightening agents. Non-limiting examples of skin tightening agents which are useful in the compositions of the present invention include monomers which can bind a polymer to the skin such as (meth)acrylic acid and a hydrophobic monomer comprised of long chain alkyl (meth)acrylates, mixtures thereof, and the like.

[0132] Active ingredients in the inventive personal toilet bar compositions may also include antiitch ingredients. Suitable examples of anti-itch ingredients which are useful in the compositions of the present invention include hydrocortisone, methdilizine and trimeprazine, mixtures thereof, and the like.

[0133] Non limiting examples of hair growth inhibitors which are useful in the inventive personal toilet bar compositions include 17 beta estradiol, anti angiogenic steroids, curcuma extract, cycloxygenase inhibitors, evening primrose oil, linoleic acid and the like. Suitable 5-alpha reductase inhibitors such as ethynylestradiol and, genistine mixtures thereof, and the like.

[0134] Advantageously cationic skin feel agent(s) or polymer(s) are used from about 0.01 , 0.1 or 0.2% by wt. to about 1 , 1.5 or 2.0% by wt.

[0135] Use

[0136] The present invention provides use of acrylic polymer and starch according to the first aspect, in a liquid cleansing composition for providing a moisturizing effect.

[0137] The present invention provides use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, and iii. 5 to 80 wt% water; for providing better skin clarity and / or glow and radiance, as compared to the composition without starch.

[0138] The present invention provides use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, and iii. 5 to 80 wt% water; for providing better foam stability, as compared to the composition without starch.

[0139] The present invention provides use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. 0.1 to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof, and iii. 5 to 80 wt% water; for providing moisturization as compared to the composition without starch.

[0140] The present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to the first aspect, for providing better skin clarity and / or glow and radiance as compared to the composition without starch and acrylic polymer. It is preferred that the comparison is with the composition without 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer.

[0141] The present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to the first aspect, for providing better moisturization as compared to the composition without starch and acrylic polymer. It is preferred that the comparison is with the composition without 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer.

[0142] The present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to the first aspect, for providing better skin radiance and glow as compared to the composition without starch and acrylic polymer. It is preferred that the comparison is with the composition without 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer.

[0143] The present invention provides use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to according to the first aspect, for providing better skin clarity as compared to the composition without starch and acrylic polymer. It is preferred that the comparison is with the composition without 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer.

[0144] Method

[0145] The cleansing composition of the present invention is prepared using the process comprising steps of: i. solubilization of chelating agents, preservatives in aqueous medium followed by; ii. dispersal of acrylic polymer in surfactant water solution followed by neutralization if needed; iii. addition of non-soap surfactants in water to form a surfactant water solution; and iv. addition of starch slurry with stirring to obtain the liquid cleansing composition of the present invention.

[0146] The viscosity of the final cleansing composition may be adjusted by addition of rheology modifying agents such as electrolytes or thickening polymers.

[0147] While this invention has been described with respect to particular embodiments thereof, it is apparent that numerous other forms and modifications of the invention will be obvious to those skilled in the art. The appended claims and this invention generally should be construed to cover all such obvious forms and modifications which are within the true spirit and scope of the present invention.

[0148] Examples

[0149] The invention will now be demonstrated with examples. The examples are for purpose of illustration only and do not limit the scope of claims in any manner.

[0150] Example 1

[0151] Preparation of compositions

[0152] The compositions for comparative study were made by solubilizing the chelating agent in water medium followed by. The acrylic polymer was then dispersed in water followed by neutralization followed by addition of surfactants like PAS / CMEA at about 70 to 80°C until solubilized under stirring, followed further by addition of surfactants like SLES / CAPB / Decyl Glucoside / Cocamide mono-ethanol amine at temperature less than 60°C. The acrylic polymer was then dispersed in water followed by neutralization. Preservative, colourants, fragrance and other skin benefit aids were added. Starch was added pre dispersed in glycerine slurry under rapid stirring and final adjustment of viscosity with electrolytes.

[0153] Starch was sourced from AGRANA STARKE- STARKINA NATURAL which is 100 % native potato starch, of EU-origin, typically soured from Austria and the Czech Republic. Maize was also sourced from AGRANA STARKE- MAISITA 9040- 100 % native maize starch, of EU-origin, typically sourced from Austria, Slovakia and Hungary. Rice was sourced from AGRANA STARKE- REISITA NATURAL- 100 % native rice starch. The compositions of table 1 were prepared in accordance with the above methodology. S1 is control composition without starch, S2 does not have polymer but has starch. S3 and S4 have polymer and varying levels of native starch and varying levels of polymers at 0.9 and 1.2wt% and S5 has polymer modified starch and 1.2wt% of modified starchpolymer by weight of the respective composition disclosed in Table 1.

[0154] Table 1:

[0155] Example 2

[0156] Home Use Tests (HUT) studies: Blind Monadic HUT was done with 7 Days product placement followed by telephonic interviews. In-home, Blind Product Test was done in opaque white bottles among Female aged 18-45 years (18-30: 40%, 31-45: 60%), bodywash category users, using bodywash at least 4 times a week.

[0157] The control composition S1 was compared with composition S2 which did not have the acrylic polymer and composition S3, S4, S5 of the present invention. The composition S2 was unstable and sedimented and therefore could not be subjected to human use test. Table 2 provides mean scores on the scale from 1 to 7 (Very poor -1 - 7-Excellent) basis the benefit parameters of overall score, gentleness and mildness and moisturizing benefit.

[0158] Table 2

[0159] It is seen from the data of Table 2 that basis the benefit parameters, S3 containing starch in combination with polymer according to the first aspect of the present invention performs superior (There is a significant improvement at 90 or 95% level of confidence in a 2 tailed T test) to the control S1 on all the given parameters 1 to 3. S2 containing starch without polymer underwent sedimentation and was not suitable for human use test. S4 containing starch in combination with polymer more than 1.1 wt% performs parity (No significant improvement at 90 or 95% level of confidence in a 2 tailed T test) to the control S1 on all the given parameters 1 to 3. Also, S5 containing hydrophobically modified starch of maize origin in combination with polymer more than 1.1% performs parity (No significant improvement at 90 or 95% level of confidence in a 2 tailed T test) to the control S1 on all the given parameters 1 to 3. Therefore, it can be inferred that the compositions S3 prepared in accordance with the present invention with the given concentrations of starch and polymer have better consumer desirable skin benefits as compared to all other compositions which are not according to the first aspect of the present invention.

[0160] Example 3: Clinical study method and protocol:

[0161] GLOW & RADIANCE - Single Parameter Scale

[0162] A double blind randomised clinical study was performed under dermatologist supervision and evaluated by a dermatologist. This included panellists from Fitzpatrick scale 3 to 6 and with dark spot due to PIH as per dermatologist discretion. Panellists were provided a wash off period to acclimatise them, and the study duration extended from a minimum of 2 weeks to a maximum of 6 weeks with clinical assessments performed at week 1 , week 2 and week 4 post regular use of the product. Dermatologists used in this study were trained and validated for the evaluation skills. MSCR single parameter glow measure skin glow and radiance and is scaled between 0 - 9 where a score of 0 indicates No glow, Score of 1-3, 4-6 and 7-9 indicates mild, moderate, glowing and radiant skin respectively.

[0163] Skin Clarity - The subjects reported for assessment were instructed to wash their face and forearm with water and acclimatized at the testing center. Post acclimatization the subjects are assessed by trained dermatologists using Skin Clarity Scale, which is based on the reflectance / luminance assessment. The skin clarity is scaled between 1- 5 where lower value indicates unclear skin and higher value indicates clear skin. Skin clarity is a result of phenotypic changes that is mostly marginal and difficult to perceive, statistically significant increase in the skin clarity score observed post product use is an indication of improvement in skin clarity.

[0164] Table 3

[0165] Compositions S1 and S3 were compared by dermatological assessment and image analysis to give a mean CFB - change from baseline value which are analyzed using appropriate statistical tools for glow and radiance, and skin clarity. It was observed that increase in respective parameter values is statistically significant for S3 as compared with S1 at a confidence limit of 95% showing that the compositions according to the present invention are better in clinical study parameters of ‘skin clarity’ and ‘Glow and Radiance’.

Claims

Claims:

1. A cleansing composition comprising i. 0.1 to 40 wt% non-soap surfactant; ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; iii. 0.05 to 5 wt% starch; and iv. 5 to 80 wt% water.

2. A composition according to claim 1 , wherein the starch is native starch.

3. A composition according to claim 1 or 2, wherein the starch is pregelatinized, native ungelatinized, partially gelatinized or partially hydrolyzed.

4. A composition according to anyone of the preceding claims from 1 to 3, wherein particle size of the starch is in the range of from 2 to 50pm.

5. A composition according to anyone of the preceding claims from 1 to 4, wherein the wherein particulate morphology of at least 80wt% of the starch is round or oval.

6. A composition according to claim 5, wherein the polymer is an acrylic polymer.

7. A composition according to anyone of the preceding claims from 1 to 6, wherein the non-soap surfactant is selected from the group consisting of anionic surfactant, amphoteric surfactant, zwitterionic surfactant, non-ionic surfactant and mixtures thereof.

8. A composition according to anyone of the preceding claims from 1 to 7, wherein the composition comprises 0.1 to 3 wt% of chelating agent.

9. A composition according to claim 8, wherein the chelating agent is selected from the group consisting of Ethylene Diamine Tetra Acetic acid (EDTA), or Diethylene Triamine Penta Acetic acid (DTPA), sodium gluconate, sodium citrate and mixtures thereof.

10. A composition according to anyone of the preceding claims from 1 to 9, wherein the composition comprises a preservative in the range of from 0.1 to 5 wt% by weight of the composition.

11. A composition according to claim 10, wherein the preservative is selected from sodium benzoate, benzoic acid, potassium sorbate, methylparaben, ethylparaben, propylparaben, butylparaben and heptyl paraben, combinations or mixtures thereof.

12. Use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. 0.1 to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; and iii. 5 to 80 wt% water; for providing better skin clarity and / or glow and radiance as compared to the composition without starch.

13. Use of 0.05 to 5 wt% starch, based on the weight of the resulting cleansing composition, in a cleansing composition comprising; i. 0.1 to 40 wt% non-soap surfactant, ii. 0.05 to 1.1 wt% polymer selected from the group consisting of acrylic polymer, cellulosic polymer, copolymer thereof and mixtures thereof; and iii. 5 to 80 wt% water; for providing moisturization as compared to the composition without starch.

14. Use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to anyone of the preceding claims from 1 to 11 , for providing better skin clarity and / or glow and radiance as compared to the composition without starch and acrylic polymer.

15. Use of 0.05 to 5 wt% starch and 0.05 to 1.1 wt% acrylic polymer in a cleansing composition according to anyone of the preceding claims from 1 to 11 , for providingbetter moisturization as compared to the composition without starch and acrylic polymer.

Images