Transparent hair care composition

Abstract

The present invention relates to a transparent hair care composition comprising: 0.1 to 5 wt% hydrolyzed yeast protein, 0.1 to 20wt% a non-ionic surfactant comprising a sorbic acid based non-ionic surfactant and alkoxylated alcohol based non-ionic surfactant, 0.01 to 3 wt% preservative, 0.01 to 3 wt% chelating agent, 0.01 to 3 wt% polycationic polymer, and 80 to 95wt% water.

Description

[0001] TRANSPARENT HAIR CARE COMPOSITION

[0002] Field of the Invention

[0003] The present invention relates to a clear, or transparent, leave-on hair treatment composition. In particular the present invention relates to use of scalp and / or hair care composition for hair and scalp care benefits comprising hydrolyzed yeast protein which is transparent even at low temperatures.

[0004] Background of the Invention

[0005] Hair care compositions generally provide cleansing or conditioning benefits or a combination of the two. Such compositions typically comprise one or more cleansing surfactants which generally aid in cleaning the hair and / or the scalp free of undesirable soil, particles, and fatty matter.

[0006] Leave on hair care compositions have been quite common. It has been a consumer preference to select transparent hair care compositions over opaque compositions. As transparent leave-on compositions give a perception of being mild and hypoallergic to the consumers which helps in acceptance by the consumers.

[0007] It has often been a challenge for the manufacturers of hair care serums to provide a composition which has hair benefit actives as well as visual transparency and the right consumer acceptable rheology in terms of viscosity (neither too runny and nor too thick). Usually the hair benefit actives make it difficult to achieve a transparent hair care composition which remains transparent even at low temperatures.

[0008] CN114469808 (HU Weihua) relates to a nano-emulsion containing yeast peptide hydrolysate, a preparation method of the nano-emulsion and application of the nanoemulsion in anti-hair loss cosmetics. The nano-emulsion comprises yeast peptide hydrolysate, ergothioneine, a chelating agent, an emulsifier, propylene glycol caprylate, a schisandra fruit extract, gallic acid and the like. As an active matter carrier, the antihair loss composition has more excellent anti-hair loss performance than commercially available products when being applied to anti-hair loss cosmetics, and the hair loss phenomenon caused by long-term oxidative stress reaction is avoided. Therefore there remains a need to have a transparent hair care composition with the consumer desired rheology which can incorporate hair care benefit agents.

[0009] Summary of the Invention

[0010] First aspect of the present invention provides a transparent hair care composition comprising: a. 0.1 to 5 wt% hydrolyzed yeast protein, b. 0.1 to 20wt% a non-ionic surfactant comprising a sorbic acid based non-ionic surfactant and alkoxylated alcohol based non-ionic surfactant, c. 0.01 to 3 wt% preservative, d. 0.01 to 3 wt% chelating agent, e. 0.01 to 3 wt% polycationic polymer, and f. 80 to 95wt% water.

[0011] Second aspect of the present invention provides a non-therapeutic method of preventing or reducing hair fall in an individual in need thereof, comprising topically applying a hair care composition comprising composition according to the first aspect, in an amount effective to reduce shedding of hair club fibres from hair follicles of the individual, and / or reduce hair breakage of the individual.

[0012] Third aspect of the present invention provides use of composition according to the first aspect to manufacture a transparent hair care composition.

[0013] Fourth aspect of the present invention provides a hair care composition comprising hydrolyzed yeast protein, polycationic polymers and polysorbate based emulsifier to manufacture a transparent hair care composition having viscosity in the range of 0.4 - 1.5 Pa*s (400 to 1500 cps).

[0014] Detailed Description of the Invention

[0015] 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. The word “comprising” is intended to mean “including” but not necessarily “consisting of” or “composed of.” In other words, the listed steps or options need not be exhaustive. 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. 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.

[0016] Throughout the specification unless otherwise specified, wt% means weight % of the total weight of the hair care composition of the present invention.

[0017] "Leave-on" as used herein means compositions that are applied to the scalp and / or skin and are not intended to be washed or rinsed off for some period of time, as contrasted with cleansing or wash-off or rinse-off compositions.

[0018] "Stable" or "Stability" as used herein means that composition does not separate and is not grainy and does not curdle and does not solidify or form a stiff gel and remains transparent over a period of time.

[0019] A “hair care composition” is a composition which is intended for application on scalp and / or hair and which benefits hair and / or scalp.

[0020] The present inventors were faced with the problem of providing a hair care composition that works for hair benefit such as reducing hair fall and which is transparent even at low temperatures such as at 4°C during winter months and in colder regions of the world. Usually hair care compositions comprise one or more of hair actives. The problem that the present inventors faced was with hydrolysed yeast protein, it was extremely difficult to control the rheology, achieve transparency and at the same time manage the stickiness effect of the composition. A composition which had all these attributes with the hydrolysed yeast protein was difficult to formulate. The formulations in the market have used silicones and / or styrene / vinylpyrrolidone copolymer or other polymers which are either non-transparent or result in a too sticky after feel or do not have the desired consumer rheology which is generally a viscosity in the range of 0.05 to 2 Pa s. The inventors tried various permutations and combinations and finally surprisingly found that the combination of the ingredients according to the first aspect resulted in compositions which have all the required characteristics of a hair care composition which as discussed supra the inventors had set out to achieve.

[0021] The composition of the present invention has consumer desirable characteristics as most hair benefit compositions have a rheology which is thick and have an after-feel of stickiness on the hair. Those compositions feel like more of a medication on hair. However, the present composition has a lighter feel, being aqueous, and is perceived to be light and mild, being transparent. The composition of the present invention neither leaves a white residue nor gives a sticky after-feel to the hair which may require a wash.

[0022] Various components of the composition are described in greater detail below.

[0023] Hair care composition

[0024] The present invention provides a hair care composition comprising: 0.1 to 5 wt% hydrolyzed yeast protein, 0.1 to 20wt% a non-ionic surfactant comprising a sorbic acid based non-ionic surfactant and alkoxylated alcohol based non-ionic surfactant, 0.01 to 3 wt% preservative, 0.01 to 3 wt% chelating agent, 0.01 to 3 wt% polycationic polymer, and 80 to 95wt% water.

[0025] The composition of the present invention can be in the form of a liquid, lotion, cream, foam, scrub, gel, or bar. Non-limiting examples of such compositions include wash-off shampoos, shampoo-cum-conditioners, conditioners, creams, lotions, gels, serums, mousses or oils. It is most preferable that the composition of the present invention is an aqueous composition for use as a hair care composition. It is most preferable that the composition is a leave-on composition, which means that it does not require washing off after application.

[0026] The hair care composition for use according to the invention is suitable for topical application to the hair and scalp.

[0027] Compositions for use in the invention will generally include a cosmetically acceptable vehicle. The term “cosmetically acceptable” means that the vehicle is suitable for topical application to the skin, has good aesthetic properties, is compatible with the at least one biotin binding compound and the at least one precursor for biotin biosynthesis selected from pimelic acid and / or salts thereof and any other ingredients, and will not cause any safety or toxicity concerns.

[0028] The vehicle may comprise an aqueous phase, an oil phase, an alcohol, a silicone phase or a mixture thereof, and may be in the form of an emulsion. Emulsions can have a range of consistencies including thin lotions (which may also be suitable for spray or aerosol delivery), creamy lotions, light creams and heavy creams.

[0029] Compositions for use in the invention may also be formulated in a single-phase carrier such as a hydrophobic or hydrophilic liquid. Suitable hydrophobic liquid carriers include liquid polyorganosiloxanes, mineral oils, hydrogenated polyisobutene, polydecene, paraffins and isoparaffins of at least 10 carbon atoms, aliphatic or aromatic ester oils (such as isopropyl myristate, lauryl myristate, isopropyl palmitate, diisopropyl sebacate, diisopropyl adipate and C12 to C15 alkyl benzoates), polyglycol ethers (such as polyglycol butanol ethers) and mixtures thereof. Suitable hydrophilic liquid carriers include water, monohydric or polyhydric aliphatic alcohols having 2 to 8, preferably 2 or 3 carbon atoms (such as ethanol and isopropanol, oligoglycol ethers having 2 to 5 repeat units (such as dipropylene glycol) and mixtures thereof.

[0030] The pH of the composition for use according to the present invention is preferably equal to or higher than 4.0, more preferably in the range of 5.0 to 7.0.

[0031] The compositions of the present invention are generally aqueous (i.e. they have water or an aqueous solution as their major component), and will suitably comprise from 50 to 98%, preferably from 60 to 90% water and most preferably from 80 to 95wt% water by weight of the total weight of the composition.

[0032] The hair care composition of the present invention is a transparent composition. The composition has a transmittance of 90-99% at 650 nm when measured with UV spectrophotometer.

[0033] The hair care compositions of the present invention are preferably neither too runny no too thick for allowing ease of separability, on or into hair. It is preferred that the compositions have viscosity in the range of 0.05 to 2 Pa s, more preferably 0.1 to 1 Pa s and most preferably 0.1 to 0.5 Pa s. The composition of the present invention is targeted to compositions which are substantially free of silicone oils. By the phrase ‘substantially free of silicone oils is meant that silicone oil is present in an amount less than 1.0 percent, preferably less than 0.5 percent, furthermore preferably less than 0.1 percent and optimally absent from the composition. It is most preferred that the composition is free of a silicone compound.

[0034] The silicone oil as per this invention is a silicone compound which is a non-volatile silicone. By non-volatile silicone it is meant that the silicone has a vapor pressure less than 0.1 mm Hg (13.3 Pa), preferably less than 0.02 mm Hg, more preferably less than 0.01 mm Hg at 25 degrees centigrade at one atmospheric pressure.

[0035] Silicone oils as per this invention include polydiorganosiloxanes, in particular polydimethylsiloxanes which have the CTFA designation dimethicone. Also included within this definition are polydimethyl siloxanes having hydroxyl end groups, which have the CTFA designation dimethiconol. Also included within the definition of silicone oils as per this invention are silicone gums having a slight degree of cross-linking, as are described for example in WO 96 / 31188 (UNILEVER).

[0036] Another class of silicones which is substantially excluded from the hair care compositions of the present invention are amino functional silicones. By "amino functional silicone" it is meant a silicone containing at least one primary, secondary or tertiary amine group, or a quaternary ammonium group. Examples of suitable amino functional silicones include: polysiloxanes having the CTFA designation "amodimethicone".

[0037] The present invention comprises 0.1 to 5 wt% hydrolyzed yeast protein, more preferably 0.8 to 3 wt% and most preferably 1 to 2.5 wt% by weight of the hair care composition of the present application.

[0038] Hydrolyzed yeast protein may also be called yeast extracts. Hydrolyzed yeast proteins are obtained from the acidic, alkaline or the hydrolysis of amino acids, peptides and proteins to yield this important ingredient. However, this form is further processed to remove impurities such as carbohydrates and lipids. Non-ionic surfactant

[0039] The present invention comprises 0.1 to 20wt% of a non-ionic surfactant, preferably 1 to 18 wt%, more preferably 2 to 17 wt% and most preferably 3 to 15 wt% of the hair care composition of the present invention.

[0040] 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 glycoside and cocoglycoside.

[0041] Preferably the non-ionic surfactant of the present invention comprises a sorbic acid based non-ionic surfactant and a further alkoxylated alcohol based non-ionic surfactant and it is most preferable that the non-ionic surfactant of the present invention is a sorbic acid based non-ionic surfactant and / or a further alkoxylated alcohol based non- ionic surfactant.

[0042] It is preferable that the alkoxylated alcohol based non-ionic surfactant is present in the hair care composition in the range of 1 to 5 wt%, more preferably 1 to 4 wt% and most preferably 1.5 to 3.5 wt% of the hair care composition of the present invention.

[0043] It is preferred that wherein the alkoxylated alcohol based non-ionic surfactant is an ethoxylated alcohol based non-ionic surfactant, preferably an ethoxylated fatty alcohol based non-ionic surfactant and most preferred that the alkoxylated alcohol based non- ionic surfactant is polyoxyethylene monoolein ether.

[0044] It is preferable that the sorbic acid based non-ionic surfactant is present in the hair care composition in the range of 1 to 15 wt%, more preferably 1.1 to 13 wt% and most preferably 1.5 to 12 wt% of the hair care composition of the present invention.

[0045] It is preferred that the sorbic acid based non-ionic surfactant is a polysorbate surfactant such as Polyoxyethylene (20) sorbitan monooleate (Polysorbate 80), this polysorbate has the following formula structure:

[0046] Wherein w, x and y are respectively 0 to 20 integers, and z is 1 to 20 integers, and w+x+y+z=4 to 30; and wherein R is straight or branched saturated or unsaturated alkyl; the saturated or unsaturated alkyl having 11 to 23 carbon atoms.

[0047] Chelating Agent

[0048] The present invention comprises a chelating agent. It is preferred that the chelating agent in the composition is present in the range of 0.01 to 3 wt% by weight of the composition, more preferably in the range of 0.1 to 3 wt% by weight of the composition, further preferably in the range of 0.8 to 2.8 wt% by weight of the composition and most preferably in the range of 1.5 to 2.5 wt% by weight of the composition.

[0049] It is preferred that the chelating agent in the composition is present at least 0.01wt%, more preferably at least 0.1 wt%, further preferably at least 1 wt% and most preferably at least 1.2 wt% by weight of the composition.

[0050] It is preferred that the chelating agent in the composition is present at most 4 wt%, more preferably at most 3 wt%, further preferably at most 2.8 wt% and most preferably at most 2.5 wt% by weight of the composition.

[0051] The preferred chelating agents are as follows (names followed by their abbreviation in parenthesis):

[0052] Ethylene Diamine Tetra Acetic acid (EDTA), 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 (GEIS), Citric Acid, Sodium Thpolyphosphate (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.

[0053] The salt form is preferred over acid form, as addition of the chelating agents in the acid form would bring about a corresponding decrease in pH, which is not desirable.

[0054] 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.

[0055] Preservative

[0056] The present invention comprises a preservative. It is preferred that the preservative in the composition is present in the range of 0.01 to 3 wt% by weight of the composition, more preferably in the range of 0.1 to 3 wt% by weight of the composition, further preferably in the range of 0.8 to 2.8 wt% by weight of the composition and most preferably in the range of 1.5 to 2.5 wt% by weight of the composition.

[0057] It is preferred that the preservative in the composition is present at least 0.01wt%, more preferably at least 0.1 wt%, further preferably at least 1 wt% and most preferably at least 1.2 wt% by weight of the composition. It is preferred that the preservative in the composition is present at most 4 wt%, more preferably at most 3 wt%, further preferably at most 2.8 wt% and most preferably at most 2.5 wt% by weight of the composition.

[0058] Very useful examples of the preservatives suitable for the compositions of the present inventions, but are not limited to, chlorite components, sorbic acid components and mixtures thereof.

[0059] Specific examples of chlorite components useful as preservatives in accordance with the present invention include stabilized chlorine dioxide (SCD), metal chlorites, such as alkali metal and alkaline earth metal chlorites, and the like and mixtures therefor. Technical grade (or USP grade) sodium chlorite is a very useful preservative component.

[0060] Specific examples of sorbic acid components useful as preservatives in accordance with the present invention include sorbic acid itself, as well as pharmaceutically and / or ophthalmically acceptable sorbic acid derivatives and mixture thereof. Useful sorbic acid components include, but are not limited to, metal sorbates, such as alkali metal and alkaline earth metal sorbates, and the like and mixtures thereof.

[0061] 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 hamstoff, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-chloroacetamide, benzalkonium chloride, benzyl alcohol and caprylyl glycol.

[0062] It is particularly preferred according to the invention if sodium benzoate, Caprylyl glycol, sodium salicylate, methyldibromoglutaronitrile and I or phenoxyethanol are used as preservatives.

[0063] The present invention comprises a thickening agent such as a polycationic polymer.

[0064] The hair care composition of the present invention comprises 0.01 to 3 wt% of polycationic polymer, preferably 0.08 to 2.8 wt%, more preferably 0.1 to 2.5 wt% and most preferably 0.2 to 2.3 wt% by the weight of hair care composition. Cationic polymers may include but not limited to polyquaternium or their respective salts, especially copolymers of vinylpyrrolidone / N-vinylimidazoliumsalts (Luviquat® FC, Luviquat® HM, Luviquat® MS, Luviquat® Ult- racare); copolymers of N-vinylpyrrolidone / dimethylaminoethylmethacrylate quaternised with diethylsulfate (Luviquat® PQ 11), copolymers of N-cationic cellulose derivatives (Polyquaternium-4 and-10), acrylamidcopolymers (Polyquaternium-7).

[0065] Water

[0066] The present invention is an aqueous composition and comprises 60 to 98 wt% water, preferably 65 to 97 wt% water, more preferably 70 to 96 wt% water and most preferably 80 to 95 wt% water. It is preferable that the compositions of the present invention has at least 60 wt% water, more preferably 65 wt% water, more preferably 70 wt% water and most preferably at least 80 wt% of water.

[0067] Hair benefit actives

[0068] The present invention may comprise hair benefit actives such as anti-dandruff actives, hair growth actives, anti-hair fall actives, anti-itch actives, conditioning actives etc.

[0069] The present invention may include an anti-dandruff agent. Anti-dandruff agent when present in the hair care composition are compounds that are active against dandruff and are typically anti-microbial agents and preferably antifungal agents. Suitable antidandruff agents that may be used in this invention are selected from piroctone olamine (Octopirox(R)), selenium sulfide and mixtures thereof. In a preferred embodiment, the antidandruff agent is piroctone olamine.

[0070] Suitable anti-dandruff agents that may be used in this invention are selected from piroctone olamine (Octopirox(R), ziziphus extract, azole based anti-fungal agents, selenium sulfide and mixtures thereof. The preferred azole based anti-fungal agent is ketoconazole, climbazole or mixtures thereof. Preferably, the anti-dandruff agent is selected from piroctone olamine, ziziphus extract, climbazole and mixtures thereof. In an especially preferred embodiment, the anti-dandruff agent is piroctone olamine and ziziphus extract.

[0071] Typically, when the hair care composition of the invention comprises an anti-dandruff agent, it is usually comprised in an amount of from 0.01 to 5 wt %, more preferably from 0.01 to 3 percent, more preferably still from 0.05 to 2 wt %, and most preferably from 0.05 to 1.5 wt %, based on total weight of the hair care composition and including all ranges subsumed therein.

[0072] Hair growth stimulant I anti-hair fall actives, composition of the present invention may contain various active components and supplementary components normally used in topical preparations in an amount that does not harm the effect of the present invention. Examples of these components include fillers, vasodilators (carpronium chloride, benzyl nicotinate, swertia herb extract, panax ginseng extract, capsicum tincture, and the like), antihistamines (isothipendyl hydrochloride and the like), antiinflammatory agents (guaiazulene and the like), keratolytics (urea, salicylic acid, and the like), antimicrobial agents (chlorhexidine gluconate, isopropylmethylphenol, quaternary ammonium salts, piroctone olamine, and the like), humectants (sodium hyaluronate, chondroitin sulfuric acid, and the like), zinc salts (zinc sulfate, zinc gluconate), extracts of animals and plants (Taxus cuspidata, Paeonia suffruticosa, Glycyrrhisa uralensis, Hypericum erectum, aconite root, Eriobotrya japonica, Artemisia capillaris, Symphytum officinale, Angelica keiskei, Crocus sativus, Gardeniae fructus, Rosmarinus officinalis, Salvia officinalis, Saussurea lappa, Aristolochia debilis, Lupuli strobilus, placenta, and the like), vitamins (retinol acetate, pyridoxine hydrochloride, ascorbic acid, thiamin nitrate, cyanocobalamin, biotin, and the like), anti-oxidants (dibutylhydroxytoluene, sodium pyrosulfite, tocopherol, sodium edetate, ascorbic acid, isopropyl gallate, and the like), solubilizers (diisopropyl adipate, isopropyl myristate, vegetable oils such as grape seed oil, animal oils, alkyl glyceryl ethers, hydrocarbons, and the like), metabolic activators (panthenol and the like), gelling agents (water- soluble high molecular compounds and the like), adhesives, perfumes, refrigerants (mentha oil, camphor, and the like), dyes, and the like.

[0073] Other

[0074] Preferably, the composition comprises perfume.

[0075] Preferably, the composition comprises a cosolvent for the perfume. Co-solvents prevent the scattering of light particles that occurs in the composition and thus maintain the transparency of the composition. Preferred co-solvents include alcohols, especially ethanol.

[0076] Preferably, the composition comprises 0.01 to 2wt%, more preferably 0.01 to 2wt%, most preferably 0.8 to 1.2% by weight of thickener. This provides the best rheological properties of the composition. Suitable thickeners are selected from the group of cellulose based polymers, acrylate based polymers and more preferably acrylate based polymers,. Most preferably the acrylate based polymers are acrylate cross polymers. Preferably, the composition comprises a co-surfactant I co-solvent for the perfume. Cosurfactants also prevent the formulation of light scattering particles and thus maintain the transparency of the composition. Preferred co-surfactants include cremofore as well as Eumulgin HPS, which is composed of coceth-7 and PPG-1 PEG-9 Lauryl glycol ether and PEG-40 hydrogenated castor oil.

[0077] Preferably, such co-surfactants are included from 0.1 to 3% by weight. Preferably from 1 to 1.5% by weight.

[0078] Preferably, the composition comprises a cationic surfactant. Cationic surfactants provide a hair conditioning benefit.

[0079] Preferably, the composition comprises a fatty material selected from fatty alcohols, fatty acids, fatty amides and fatty esters. Fatty materials provide a hair conditioning benefit. Preferably the composition comprises a preservative in the range of 0.1 to 2 wt% by weight of the composition. The preservative can be chosen such that it doesn’t effect the transparency of the composition. Preferred preservatives for the purpose of this invention may be selected from the group of benzoates, phenoxylates, salicylates, chloride based, aromatic ethers etc. and the likes.

[0080] Compositions according to the present invention may also include some of the known ingredients used in the conditioning sera, which do not impair the overall transparency of the composition. Typical of such ingredients are water miscible silicones, such as certain aminosilicones or silicone polyethers. The composition according to the present invention may be packaged in any suitable packaging, for example a spray, pot, spray bottle etc.

[0081] Mode of Use

[0082] The hair care composition of the invention is primarily intended for topical application to hair and scalp.

[0083] When the composition is a shampoo, it is topically applied to the hair and then massaged into the hair and scalp. Then it is rinsed with water prior to drying the hair. It is preferred that hair care composition is applied topically to the scalp and left for at least 15 minutes, more preferably at least 30 minutes and most preferably at least 60minutes for effective result to reduce shedding of hair club fibres from hair follicles of the individual, and / or reduce hair breakage of the individual. The composition is preferably a leave-on composition and does not need a wash or rinse post application.

[0084] The present invention provides a non-therapeutic method of preventing or reducing hair fall in an individual in need thereof, comprising topically applying a hair care composition comprising composition according to the first aspect, in an amount effective to reduce shedding of hair club fibres from hair follicles of the individual, and / or reduce hair breakage of the individual.

[0085] Use

[0086] The present invention provides a hair care composition according to the first aspect for use in preventing or reducing shedding of hair club fibres from hair follicles, and / or preventing or reducing hair breakage, thereby preventing or reducing hair fall.

[0087] The present invention provides a hair care composition according to the first aspect for use in preparing a transparent composition having has a transmittance of 90-99% at 650 nm.

[0088] Process

[0089] The present invention provides a method of preparing a transparent hair care composition according to the first aspect, the method comprising steps of: i. mixing the polycationic polymer and water to form a mixture-l; ii. adding non-ionic surfactant to the mixture of step (i) to form a mixture-ll; iii. adding hydrolyzed yeast protein, preservative and chelating agents to the mixture-ll of step (ii) to obtain the composition according to the first aspect.

[0090] EXAMPLES

[0091] Example 1 - hair care compositions

[0092] The hair care compositions for the examples were prepared in accordance with the present invention. Demineralized water was taken in a vessel. Polycationic polymer were added over the top under stirring. Stirring was continued for 20 mins at 500 RPM. Silicones were added over the top. Oleth-20 was melted in heating chamber at 40 degrees and was then added to the main vessel in liquid form. Emotives were mixed with water and then added to the main vessel. Hydrolyzed Yeast Protein and preservatives was added over the top and allowed to mix for 10 mins. Polysorbate 80 was then added over the top into the main mixer. pH was adjusted between 5-7 using citric acid or sodium hydroxide as required.

[0093] Viscosity was measured using Brookfield with Spindle no. 2, 20 RPM for 1 min. 0.1 to 2 Pa s was considered as acceptable desired viscosity for the examples.

[0094] Transparency was measured at 4°C and 45°C. The transmittance was found to be greater than 98% when measured at 650nm in UV spectrophotometer.

[0095] For comparative analysis, a control composition with styrene / vinylpyrrolidone copolymer was taken which was opaque. Various compositions were prepared to achieve the desired result, a few of them are listed in Table 1. All compositions were formulated with hair benefit actives such as zinc gluconate, zinc sulfate, grape seed oil and hydrolyzed yeast protein. Composition E1 was formulated similar to the control without styrene / vinylpyrrolidone copolymer. E2 was also formulated similar to the control without styrene / vinylpyrrolidone copolymer, the rheology modifying agent Polyacrylate Crosspolymer-6 was used. Similarly for E3, E4 and E6, the rheology modifying agents sclerotium gum, hydroxyethyl cellulose and hydrogenated castor oil ethoxylates - PEG-40-HCO were respectively used. For E5, which is the preferred composition of the present invention, ethoxylated oleyl alcohol and polysorbate 80 were used as non-ionic surfactants and Polyquaternium 10 as a polycationic polymer was used. E7 on the other hand has Polyquaternium 10 as a polycationic polymer and sorbic acid based non-ionic surfactant as polysorbate 80, E7 is similar to E5, but has no alkoxylated alcohol based non-ionic surfactant which is ethoxylated oleyl alcohol. Table 1 The data in the table above shows that E1 which was formulated similar to the control without the styrene / vinylpyrrolidone copolymer was very runny and did not possess the consumer desired rheology. On the other hand, when polyacrylate crosspolymer-6 was used in E2 the composition turned turbid at 45°C within 48 hrs. Similarly E3 and E4 and E6 resulted in a turbid composition. Whereas, E5 formulated according to the composition of the present invention, the result was a transparent composition which was stable for about 12 weeks at from 4°C to 45°C temperature and with an acceptable desired viscosity. Control, E1 to E4 and E6 were a bit on the runny side in terms of viscosity, whereas even though E7 had good desired viscosity, it was turbid and therefore not acceptable.

Claims

CLAIMS1. A transparent hair care composition comprising: a. 0.1 to 5 wt% hydrolyzed yeast protein, b. 0.1 to 20 wt% a non-ionic surfactant comprising a sorbic acid based nonionic surfactant and a further ethoxylated alcohol based non-ionic surfactant, c. 0.01 to 3 wt% preservative, d. 0.01 to 3 wt% chelating agent, e. 0.01 to 3 wt% polyquaternium salt , and f. 65 to 95 wt% water.

2. A composition according to claim 1 , wherein the composition comprises 1 to 15 wt% of sorbic acid based non-ionic surfactant by weight of the hair care composition.

3. A composition according to claims 1 or 2, wherein the sorbic acid based non-ionic surfactant is a polysorbate surfactant.

4. A composition according to any one of the preceding claims 1 to 3, wherein the sorbic acid based non-ionic surfactant is polyoxyethylene (20) sorbitan monooleate.

5. A composition according to any one of the preceding claims 1 to 4, wherein the composition comprises 1 to 5 wt% of ethoxylated alcohol based non-ionic surfactant.

6. A composition according any one of the preceding claims 1 to 5, wherein the ethoxylated alcohol based non-ionic surfactant is polyoxyethylene monoolein ether.

7. A composition according to anyone of the preceding claims 1 to 6, wherein the preservative is benzoic acid or derivative, paraben derivative, or a sorbate derivative or mixtures thereof.

8. A composition according to anyone of the preceding claims 1 to 7, wherein the preservative is selected from sodium benzoate, benzoic acid, potassiumsorbate, methylparaben, ethylparaben, propylparaben, butylparaben and heptyl paraben, combinations or mixtures thereof.

9. A composition according to any one of the preceding claims 1 to 8, wherein the chelating agent is selected from the group of ethylene diamine tetra acetic acid (EDTA), or diethylene triamine penta acetic acid (DTPA), their derivatives, combinations and mixtures thereof.

10. A composition according to any one of the preceding claims 1 to 9, wherein the composition is a leave-on composition.

11. A composition according to any one of the preceding claims 1 to 10, wherein the composition comprises anti-hair fall active agents selected from the group of fillers, vasodilators, antihistamines, anti-inflammatory agents, keratolytics, antimicrobial agents, humectants, zinc salts, extracts of animals and plants selected from the group of Taxus cuspidata, Paeonia suffruticosa, Glycyrrhisa uralensis, Hypericum erectum, aconite root, Eriobotrya japonica, Artemisia capillaris, Symphytum officinale, Angelica keiskei, Crocus sativus, Gardeniae fructus, Rosmarinus officinalis, Salvia officinalis, Saussurea lappa, Aristolochia debilis, Lupuli strobilus, and placenta; vitamins, anti-oxidants, solubilizers, metabolic activators, gelling agents, adhesives, perfumes, refrigerants and dyes.

12. A non-therapeutic method of preventing or reducing hair fall in an individual in need thereof, comprising topically applying a hair care composition according to any one of the preceding claims 1 to 11.

13. Use of a hair care composition according to any one of the preceding claims 1 to 11 , to reduce shedding of hair club fibres from hair follicles of an individual, and / or reduce hair breakage of an individual.

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