WO2025133938A1

WO2025133938A1 - A hair bleach and colour deposition formulation and method of preparation thereof

Info

Publication number: WO2025133938A1
Application number: PCT/IB2024/062808
Authority: WO
Inventors: Jayaganesh Sankar; Puja Sangle; Mridula Kini
Original assignee: MARICO Ltd
Current assignee: MARICO Ltd
Priority date: 2023-12-19
Filing date: 2024-12-18
Publication date: 2025-06-26
Anticipated expiration: 2026-06-19

Abstract

The present disclosure relates to a hair bleach and colour deposition formulation comprising a first component and a second component. The present disclosure also discloses a method of preparation of hair bleach and colour deposition formulation. The present disclosure also discloses a method of apply colour to the hair The method comprising mixing of the first component and the second component to form a paste and applying the paste to the hair directly, leaving and followed by washing to get the coloured hair, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5:1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes. The present disclosure provides a user-friendly, easy to use method of application for modifying hair colour.

Description

A HAIR BLEACH AND COLOUR DEPOSITION FORMULATION AND METHOD OF PREPARATION THEREOF

FIELD OF THE INVENTION

[0001] The present disclosure relates to a method of modifying colour of keratin fibres, and a formulation system for the same. The present disclosure relates to a hair bleach and colour deposition formulation. The present disclosure also relates to a method of preparation of hair bleach and colour deposition formulation and its method of application to the hair.

BACKGROUND OF THE INVENTION

[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] Hair have long been associated with beauty of a person and therefore, there have been efforts to modify hair colour in order to enhance appearance. Melanin pigment is responsible for the hair colour, and it is present in cortex in the form of granular form. Melanin pigment is further classified into the two types, namely eumelanin and pheomelanin. Eumelanin is responsible for the brownish black shade or hue to the hair and pheomelanin is responsible for the reddish orange shade or hue to the hair. High eumelanin content responsible for the darker hair and high pheomelanin content responsible for the reddish orange shade. Light blonde hair typically has low concentrations of both the pigments.

[0004] Conventionally, to modify hair colour, a user had to first bleach the hair with a composition with a pH of about 12, for at least 30 minutes, which would be followed by applying hair colour composition for another 30 minutes, after which the hair are washed. Some compositions also require heat treatments. This is at least one hour of treatment. Both alkali as well as heat treatments are known to damage hair. Another problem is the mixing of multiple ingredients in multiple packs with differing proportions. This reduces the ease of use for the end use consumer. The more the steps, the lesser would be the ease of use.

[0005] Hair bleaching destroys the melanin granules in the cortex and helps to reduce the melanin content in hair. Generally, higher ammoniacal solution and hydrogen peroxide used to bleach the hair. Higher pH helps to open the cuticle and peroxide molecules enter into hair and diffuse the melanin pigments. Both the melanin pigments are not broken at the same rates, in general eumelanin is easily breakable than pheomelanin. [0006] Hair bleaching processes are further classified into two types based on their chemical composition and their strength.

[0007] Category 1 bleaches are mild liquid or creme based compositions utilising alkaline hydrogen peroxide solutions as the main oxygen generating agent to oxidise and bleach the melanin, it is almost similar to the hair colouring application process. Just before use, the peroxide is mixed with an alkalising agent such as ammonia and the resulting liquid or creme is applied to hair for 30 to 60 minutes. Such a composition may lighten the hair by as much as 4 levels at the most depending on the concentration of hydrogen peroxide. Category 2 bleaches are strong bleaches, it is in powder and/or creme format. In general, alkaline earth metal or earth metal salt of persulfate, percarbonate, (ammonium, potassium, sodium) are used for the bleach and alkalinity salt source also used for the high pH. Category 2 also, just before mix the powder or creme with hydrogen peroxide solution to form a paste and applied to the hair. Category bleach 2 helps to lighten the hair more than 4 levels, based on the oxidizing agent and hydrogen peroxide dosage the lift level increased. With category 1 bleaches it is difficult to deliver the vibrant shades on the darker shades.

[0008] Efforts have been made to combine the ingredients and/or steps in order to reduce the steps and to do away with the heat treatment. US 5688291 discloses a one-step application process, however as it uses azo dyes, the retention of the dyes after wash is very less. This patent requires heat treatment to increase the uptake. US 7708021 does away with the heat treatment however is a 3-component system, wherein 1 part of bleach is to be mixed with 1.5 parts of developer, 1 part of colour and 8 parts of water. This adds to the complexity of use. IN 2163/MUM/2008 discloses a single component, one-step process, but fails to deliver vibrant colours.

[0009] There is, therefore, an unmet need to provide a method of modifying hair colour and a system that would deliver vibrant colour with ease of application at room temperature in a way that does not damage the hair.

OBJECTS OF THE INVENTION

[0010] An objective of the present disclosure is to provide a hair bleach and colour deposition formulation.

[0011] Another objective of the present disclosure is to provide a method of preparation of hair bleach and colour deposition formulation.

[0012] Another objective of the present disclosure is to provide a method of apply colour to the hair. [0013] Another objective of the present disclosure is to provide a method of modifying hair colour at room temperature.

[0014] Yet another objective of the present disclosure is to provide a system to deliver vibrant colour to the hair without damage the hair.

SUMMARY OF THE INVENTION

[0015] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in Detailed Description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0016] An aspect of the present disclosure is to provide a hair bleach and colour deposition formulation comprising: a first component; and a second component, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1, and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

[0017] Another aspect of the present disclosure is to provide a method of preparation of hair bleach and colour deposition formulation comprising: mixing 20 to 80 % w/w of an oxidizing agent in 1 to 20 % w/w of a thickener at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain a first mixture; blending 0.1 to 10 % w/w of a surfactant in 20 to 40 % w/w of an alkalizing agent with 0. 1 to 5 % w/w of a conditioner at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain to form a second mixture; adding 0.001 to 10 % w/w of a dye to the second mixture followed by addition of the first mixture to the said mixture at a temperature in the range of 15 to 30 °C for a period in the range of 45 to 60 min to obtain a first component; mixing of 1 to 20 % w/w of hydrogen peroxide, 1 to 10 % w/w of an emulsifier, 0.1 to 2% w/w of a chelating agent, 0.05 to 2 % w/w of a stabilizer, 2 to 10 % w/w of a structural ingredient, 1 to 5 % w/w of a penetrating agent and aqueous phase q.s. to form a second component; mixing of the first component with the second component to form a hair bleach and colour deposition formulation, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

[0018] Another aspect of the present disclosure is to provide a method of apply colour to the hair comprising: taking dry and clear hair; mixing of the first component and the second component to form a paste; and applying the paste to the hair directly, leaving and followed by washing to get the coloured hair, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

[0019] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] FIG. 1: illustrates colour delivery and uptake compare with untreated hair swatches.

DETAILED DESCRIPTION OF THE INVENTION

[0022] The following is a detailed description of embodiments of the disclosure. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0023] Unless the context requires otherwise, throughout the specification which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense that is as “including, but not limited to.”

[0024] As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. It should also be noted that the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.

[0025] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable.

[0026] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it is individually recited herein.

[0027] All processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0028] The headings and abstract of the invention provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.

[0029] The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus, if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.

[0030] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.

[0031] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description that follows, and the embodiments described herein, is provided by way of illustration of an example, or examples, of particular embodiments of the principles and aspects of the present disclosure. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the disclosure.

[0032] It should also be appreciated that the present invention can be implemented in numerous ways, including as a system, a method or a device. In this specification, these implementations, or any other form that the invention may take, may be referred to as processes. In general, the order of the steps of the disclosed processes may be altered within the scope of the invention.

[0033] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.

[0034] It has been found that any conditioner molecules, especially cationic conditioner present along with ‘colour/bleach concentrate’ enhances the dye uptake and retention property. It helps to delivers the vibrant colour to the end user.

[0035] The present invention relates to a system for modifying hair colour. The system comprises a first component or a ‘colour/bleach concentrate’, and a second component or a ‘developer’.

[0036] An embodiment of the present disclosure provides a hair bleach and colour deposition formulation comprising: a first component; and a second component, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

[0037] In an embodiment, the first component and the second component are present in a ratio of 1:3.

[0038] The first component or a ‘colour/bleach concentrate’ comprises at least an oxidizing agent, at least an alkalizing agent, at least a thickener, at least a dye, at least a surfactant, and at least a conditioner.

[0039] In an embodiment, the first component comprising: 20 to 80 % w/w of an oxidizing agent; 20 to 40 % w/w of an alkalizing agent; 1 to 20 % w/w of a thickener; 0.001 to 10 % w/w of a dye; 0.1 to 10 % w/w of a surfactant; and 0.1 to 5 % w/w of a conditioner, wherein the % w/w is based on the total weight of the first component.

[0040] The oxidizing agents are supposed to be crucial for the initial solubilisation and decolourisation of the melanin (bleaching) and accelerate the oxidation of the oxidative dye precursors (oxidative dyeing) in the hair shaft. In an embodiment, the oxidizing agent is selected from a group consisting of hydrogen peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide urea peroxide, sodium persulphate, potassium persulphate, ammonium persulphate, or a combination thereof. The oxidizing agent may be in solid form, semisolid form, or in liquid form.

[0041] The alkalizing agents are those which provide a source of ammonium ions. In an embodiment, the alkalizing agents is selected from a group consisting of ammonium chloride, ammonium sulphate, ammonium nitrate, ammonium phosphate, ammonium acetate, ammonium carbonate, ammonium hydrogen carbonate, ammonium carbamate, ammonium hydroxide, ammonia or a combination thereof. Particularly preferred are ammonium carbonate, ammonium chloride, ammonia or a combination thereof.

[0042] In an embodiment, the thickener is selected from carboxymethyl cellulose, carboxy vinyl polymers, hydroxyl ethyl cellulose, hydroxyl propyl cellulose, methyl cellulose, xanthan gum, carrageenan, alginic acid salts, pectin, gum arabic, gatch gum, karaya gum, tragacanth gum, agar powder, bentonite, cross linking polyacrylic acid salts or a combination thereof. Preferably, the thickener is selected from carboxymethyl cellulose, hydroxyl ethyl cellulose and xanthan gum. The gums can be of natural-derived or chemically modified.

[0043] In an embodiment, the dye is selected from a group consisting of oxidative dyes and non-oxidative dyes. In some embodiment, oxidative dyes comprise of intermediates known as precursors and couplers. Preferably, the precursor is selected from a group consisting of paraphenylenediamine, toluene-2,5-diamine, 2-chloro-para-phenylenediamine, N -methoxyethyl - paraphenylenediamine, N,N-bis(2-hydroxyethyl)-paraphenylenediamine, 2-(2-hydroxyethyl)- paraphenylenediamine, 2,6-dimethyl-paraphenylenediamine, 4,4'-diaminodiphenylamine, l,3-bis(N-(2-hydroxyethyl)-N-(4-aminophenyl)amino)-2 -propanol, PEG-3, 3,2'- paraphenylenediamine, paraaminophenol, paramethylaminophenol, 3-methyl-4-aminophenol, 2-aminomethyl-4-aminophenol, 2-(2-hydroxyethylaminomethyl)-4-aminophenol, orthoaminophenol, 2-amino-5 -methylphenol, 2-amino-6-methylphenol, 2-amino-5- acetamidophenol, 3,4-diaminobenzoic acid, 5 -aminosalicylic acid, 2, 4,5,6- tetraminopyrimidine, 2,5,6-triamino-4-hydroxypyrimidine, 4,5-diamino-l-(4'- chlorobenzyl)pyrazole and 4,5 -diamino- 1-hydroxyethylpyrazole, and salts thereof. Preferably, the coupler is selected from a group consisting of metaphenylenediamine, 2,4- diaminophenoxy ethanol, 2-amino-4-(2-hydroxyethylamino)anisole, 2,4-diamino-5- methylphenetole, 2, 4-diamino-5-(2 -hydroxyethoxy )toluene, 2,4-dimethoxy-l,3- diaminobenzene, 2,6-bis(2-hydroxyethylamino)toluene, 2, 4-diamino-5 -fluorotoluene and 1,3- bis(2,4-diaminophenoxy)propane, metaaminophenol, 2-methyl-5 -aminophenol, 2-methyl-5- (2-hydroxyethylamino)phenol, 2, 4-dichloro-3 -aminophenol, 2-chloro-3-amino-6- methylphenol, 2-methyl-4-chloro-5-aminophenol, N-cyclopentyl-metaaminophenol, 2- methyl-4-methoxy-5-(2-hydroxyethylamino)phenol, 2-methyl-4-fluoro-5 -aminophenol, resorcin, 2-methylresorcin, 4-chlororesorcin, 1-naphthol, 1,5 -dihydroxynaphthalene, 1,7- dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2-isopropyl-5 -methylphenol, 4- hydroxyindole, 5 -hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 6- hydroxybenzomorpholine, 3,4-methylenedioxyphenol, 2-bromo-4,5-methylenedioxyphenol, 3,4-methylenedioxyaniline, l-(2-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6- dihydroxy-3,4-dimethylpyridine, 2,6-dimethoxy-3,5-diaminopyridine, 2,3-diamino-6- methoxypyridine, 2-methylamino-3 -amino-6-methoxypyridine, 2-amino-3 -hydroxypyridine and 2,6-diaminopyridine, and salts thereof. In some embodiment, two or more of these precursors or couplers may be used in combination. The content of each of them in the whole composition is preferably from 0.001 to 10 wt. %, more preferably from 0.001 to 6 wt. %.

[0044] The choice of precursors and couplers will be determined by the color, shade and intensity of coloration that is desired. The precursors and couplers can be used herein, singly or in combination, to provide dyes having a variety of shades ranging from ash blonde to black.

[0045] At dye combination also contains one basic azo dye selected from the group consisting of: Basic Blue 41 (C.I. #11154), Basic Blue 67 (C.I. #45175), Basic Brown 1 (C.I. #21000), Basic Brown 4 (C.I. #21010), Basic Red 18 (C.I. #11085), Basic Red 22 (C.I. #11055), Basic Red 46, Basic Red 104, Basic Violet 35, Basic Yellow 45, Basic Yellow 57 (C.I. #12719) and Basic Yellow 67.

[0046] The hair colouring compositions of the present invention may also include non- oxidative hair dyes i.e., direct dyes which may be used alone or in combination with the above described oxidative dyes. Suitable direct dyes include azo or anthraquinone dyes and nitro derivatives of the benzene series and or melanin precursors and mixtures thereof. Such direct dyes are particularly useful to deliver shade modification or highlights.

[0047] In an embodiment, the surfactants have a lipophilic chain length of from about 8 to about 30 carbon atoms and is selected from a group consisting of anionic, amphoteric and cationic surfactants or a combination thereof, preferably in powder form.

[0048] Preferably, the anionic surfactant is selected from a group consisting of alkaline salts (sodium salts, ammonium salts, amine salts, amino alcohol salts and magnesium salts), alkyl sulphates, alkyl ether sulphates, alkylamido ether sulphates, alkylarylpolyether sulphates, monoglyceride sulphates, alkyl sulphonates, alkyl phosphates, alkylamide sulphonates, alkyl aryl sulphonates, a-olefin sulphonates, paraffin sulphonates, alkyl sulphosuccinates, alkyl ether sulphosuccinates, alkyl amide sulphosuccinates, alkyl sulphosuccinamates, alkyl sulphoacetates, alkyl ether phosphates, acyl sarcosinates, acyl isethionates and N- acyltaurates. The anionic surfactant is also selected from fatty acid salts such as the salts of oleic, ricinoleic, palmitic and stearic acids, coconut oil acid or hydrogenated coconut oil acid. [0049] Preferably, the amphoteric surfactant is selected from aliphatic secondary and tertiary amine derivatives in which the aliphatic radical is chosen from linear and branched chains comprising from 8 to 22 carbon atoms and comprising at least one water-soluble anionic group (for example carboxylate, sulphonate, sulphate, phosphate or phosphonate); mention may also be made of (Cg-C2o)alkylbetaines, sulphobetaines, (Cg-C2o)alkylamido(Ci-C6) alkylbetaines or (Cg-C2o)alkylamido(Ci-C6)alkylsulphobetaines.

[0050] Preferably, the cationic surfactants is selected from polyoxyalkylenated primary, secondary, or tertiary, fatty amine salts; quaternary ammonium salts such as tetraalkylammonium, alkylamidoalkyltrialkylammonium, trialkylbenzylammonium, trialkylhydroxyalkylammonium or alkylpyridinium chlorides or bromide; imidazoline derivatives; or amine oxides cationic nature; or a combination thereof.

[0051] In an embodiment, the conditioner is selected from a group consisting of natural derivatives of conditioners, silicone materials, amino silicones, polyquat or a combination thereof. Polyquatemium is a neologism used to emphasize the presence of quaternary ammonium centers in the polymer. INCI has approved at least 40 different polymers under the polyquatemium designation. Different polymers are distinguished by the numerical value that follows the word "polyquatemium". Polyquatemium-5, polyquatemium-7, Polyquatemium- 10; and polyquatemium-47 are three examples, each a chemically different type of polymer. The numbers are assigned in the order in which they are registered rather than because of their chemical stmcture. Particularly useful conditioning materials are cationic polymers.

[0052] Silicones containing groups which may be ionised into cationic groups, for example aminosilicones containing at least 10 repeating siloxane — (Si(CH₃)₂-O) units within the polymer chain, with either terminal, graft or a mixture of terminal and graft amino functional groups or a mixture of both functional terminal groups. Polymer with terminal siloxane units of (CH3)3Si— O examples of which include polymers known by the INCI nomenclature as trimethylsilylamodimethicone or a mixture of both functional terminal groups, known by the INCI nomenclature as amodimethicone.

[0053] The first component preferably contains a guar hydroxy propyl tri ammonium chloride cationic polymer. The polymer is preferably from a natural origin or from a synthetic origin, or a combination thereof. The polymer is of natural origin is selected from guar gum, synthetic, or a combination thereof. The polymer of synthetic origin is selected from polyquatemiumor a combination thereof. Polyquatemium is an organic synthesized molecules and it the combination of co-polymers of acrylamide and quarternary ammonium salt and diallyldimethyl ammonium chloride.

[0054] Preferably, the polymer is guar gum. Guar gum for use in preparing these guar gum derivatives is typically obtained as a naturally occurring material from the seeds of the guar plant. The guar molecule itself is a straight chain mannan, which is branched at regular intervals with single membered galactose units on alternative mannose units. The mannose units are linked to each other by means of [3 (1-4) glycosidic linkages. The galactose branching arises by way of an a (1-6) linkage. Cationic derivatives of the guar gums are obtained by reaction between the hydroxyl groups of the polygalactomannan and reactive quaternary ammonium compounds. The degree of substitution of the cationic groups onto the guar structure should be sufficient to provide the requisite cationic charge density described above.

[0055] In an embodiment, the second component comprising: 1 to 20 % w/w of hydrogen peroxide; 1 to 10 % w/w of an emulsifier; 0.1 to 2% w/w of a chelating agent; 0.1 to 1 % w/w of a stabilizer; 2 to 10 % w/w of a structural ingredient; 1 to 5 % w/w of a penetrating agent; and aqueous phase q.s., wherein the % w/w is based on the total weight of the second component.

[0056] In an embodiment, the emulsifier is selected from a group consisting of Glyceryl stearate self-emulsifier, Glyceryl mono sterate, PEG 100 stearate, Stearic acid, steramide AMP, stearamide AMP and glycol stearate, PEG8 propylene glycol cocoate; PEG8 propylene glycol cocoate and polyglyceryl 4-oleate, PEG 100 stearate and glyceryl stearate or a combination thereof.

[0057] Generally, the emulsifiers are selected based on HLB principle and oil in water emulsifiers are used in the hair colour developer formula, and the HLB values are greater than 15. In the developer formula the oil is the internal /dispersed phase whereas water is the external /continuous phase. The emulsifiers are selected from the group of Glyceryl stearate self-emulsifier, Glyceryl mono sterate, PEG 100 stearate, Stearic acid, steramide AMP, stearamide AMP and glycol stearate, PEG8 propylene glycol cocoate, PEG8 propylene glycol cocoate and polyglyceryl 4-oleate, PEG 100 stearate and glyceryl stearate and it ranged between 1 to 10 % and preferably 1 to 5%, the dosage will be fine tune and fixed based upon the final viscosity requirement of the bulk samples.

[0058] In an embodiment, the second component or a ‘developer’ comprises hydrogen peroxide and emulsifier. Preferably, the peroxide is between 1 to 20% of the total weight of the second component, preferably, hydrogen peroxide in between 1 to 15 % of the total weight of the second component and more preferably, hydrogen peroxide in between 1 to 12 % of total weight of the second component. The emulsifier is between 1 to 10 % of the total weight of the second component, preferably in between 1 to 5 % of the total weight of the second component.

[0059] In an embodiment, the chelating agent is selected from a group consisting of diamine- N,N'-dipolyacid, monoamine monoamide-N,N'-dipolyacid, and N,N'-bis(2- hydroxybenzyl)ethylenediamine-N,N'-diacetic acid chelants (e.g. EDDS (ethylenediaminedisuccinic acid)), carboxylic acids (e.g. aminocarboxylic acids), phosphonic acids (e.g. aminophosphonic acids), polyphosphoric acids (in particular straight polyphosphoric acids), salts and derivatives thereof, and combination thereof. The developer component contains 0.1 to 2 % chelating agent. A composition and/or formulation as described herein may comprise a chelant in an amount sufficient to reduce the amount of metals available to interact with formulation components, e.g. oxidizing agents, more particularly peroxides. Chelants are also known as chelators. In an embodiment, the chelant is ethylenediamine tetraacetic acid (EDTA) and/or editronic acid. In an embodiment, the chelant is ethylenediaminedisuccinic acid.

[0060] In an embodiment, the stabilizer is selected from a group consisting of soluble silicates, stannates, phosphonate, amino-carboxylic acid, nitric acid and its derivative and combination thereof.

[0061] Stabilizers are added in the formula to stabilize the hydrogen peroxide. The well- known conventional stabilizers such as soluble silicates, and in particular magnesium silicates, stannates and particularly sodium stannate and the heretofore commercialised phosphonate stabilisers like HEDP, EDTMP, NTMP, DTPMP and the corresponding aminocarboxylic acid stabilizers like EDTA and DTPA. The amounts of such additional stabilizers can be used at the discretion of the formulator, tetra sodium pyro phosphate stabilizer etc. In addition to that include the nitric acid and its derivative also used to stabilize the peroxide during the shelf life. In general, the stabilizer dosage range between 0.05 and 2% w/w in the formula, preferably, the stabilizer ranges between 0. 1 to 1 % w/w.

[0062] In an embodiment, the structural ingredient is selected from a group consisting of lauric acid (Cl 2), myristic (Cl 4), palmitic acid (Cl 6) and stearic acid (Cl 8) and combination thereof. These fatty acids are saturated as they do not have double bonds and are most common in cosmetics as a structural ingredients for the cosmetics, among that cetostearyl alcohol, cetyl alcohol mainly used as a structural ingredients. The structural ingredient has an amount in 2 to 10 % w/w, preferably in 4 to 8 % w/w.

[0063] In an embodiment, the penetrating agent is selected from a group consisting of oleic acid, oleth phosphate, dioleyl phosphate, phosphate esters or a combination thereof.

[0064] The developer component also contains a penetrating agent. Preferably, the penetrating agent is selected from oleic acid, oleth phosphate and dioleyl phosphate, phosphate esters or a combination thereof. Without wishing to be bound by theory, the inventors believe the penetrating agent such oleic acid penetrates the hair shaft and nourishes the hair and it helps to make the hair soft and glossier / shine looks. In the present invention the inventors have incorporated the oleic acid as the penetrating agent in the developer component between 1 to 5% of the total weight of the developer. It helps to increase the dye out and vibrancy of the hair colour and shades. The present invention relates to a one-step process of modifying hair colour. The method comprises mixing 1 part of a first component with 3 parts of a second component, applying the mixture to the hair and leaving for 30 minutes, and washing the hair after 30 minutes.

[0065] Another embodiment of the present disclosure provides a method of preparation of hair bleach and colour deposition formulation comprising: mixing 20 to 80 % w/w of an oxidizing agent in 1 to 20 % w/w of a thickener at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain a first mixture; blending 0.1 to 10 % w/w of a surfactant in 20 to 40 % w/w of an alkalizing agent with 0. 1 to 5 % w/w of a conditioner at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain to form a second mixture; adding 0.001 to 10 % w/w of a dye to the second mixture followed by addition of the first mixture to the said mixture at a temperature in the range of 15 to 30 °C for a period in the range of 45 to 60 min to obtain a first component; mixing of 1 to 20 % w/w of hydrogen peroxide, 1 to 10 % w/w of an emulsifier, 0.1 to 2% w/w of a chelating agent, 0.05 to 2 % w/w of a stabilizer, 2 to 10 % w/w of a structural ingredient, 1 to 5 % w/w of a penetrating agent and aqueous phase q.s. to form a second component; and mixing of the first component with the second component to form a hair bleach and colour deposition formulation, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes. Preferably, the first component and the second component are present in a ratio of 1 :3.

[0066] In an embodiment, the first component (colourant/bleach) can be in powder form and the second component (developer) can be in liquid or creme form. The emulsifier and the structural ingredients are used for the creme.

Method of preparation of powder colour bleach concentrate

[0067] The present invention also relates to a method of preparing the composition of the invention. The method comprises coating powder oxidizing component with thickening agent in ribbon blender for 10 to 15 minutes at room temperature. In another vessel, powder anionic surfactant, alkalizing agent and conditioners are then added one by one into the ribbon blender. The mixture is blended for 10 to 15 minutes at room temperature, primary intermediates, azo compounds, and couplers are then added into said mixture, followed by the mixture of coated oxidizing component and thickening agent. The whole mass is blended in a ribbon blender at room temperature (about 15 °C to 30°C) for 45 to 60 minutes.

[0068] Another embodiment of the present disclosure provides a method of apply colour to the hair comprising: taking dry and clear hair; mixing of the first component and the second component to form a paste; and applying the paste to the hair directly, leaving and followed by washing to get the coloured hair, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes. Preferably, the first component and the second component are present in a ratio of 1 :3.

Method of application of hair colour invention into the hair:

[0069] The product should be applied in dry and clear hair. Process of application is one part of colour bleach concentrate mixed with 3 part of oxidising agent and directly apply to the hair and wait for 30 minutes and after 30 minutes wash with water. For example, 10 gm of colour bleach concentrate powder mixed with 30 gm of developer mixture and make the uniform paste and applied to the hair and leave it for 30 minutes. After 30 minutes wasted with water and dried. ADVANTAGES OF THE PRESENT INVENTION

[0070] The present invention helps to achieve a range of advantages. The commercially available hair colour products generally rely on elaborate systems for application in which multiple products viz., bleach, colourant, and developer are mixed in various complex proportions before application on the hair. Some even require heating the mixture to temperatures as high as 55 °C which runs the risk of bums or related hazards at the end of the user. The present invention allows users to simply mix two components at room temperature before application. Furthermore, the commercially available products require the users to apply the bleach product for 30 minutes or even more, followed by another 30 minutes or more of applying the colourant. The application of these products end being a tedious process for the end user. The present invention drastically improves the user convenience and reduces the time taken for the complete application of the hair colour.

[0071] Additionally, the present invention offers the user with better colour deposition in terms of vibrancy, thereby enhancing the looks. The uptake of the colour is higher which ensures the vibrancy and longevity of the colour.

[0072] Further, the present invention does not require use of drastic pH conditions for the application of the colour, therefore the hair damage due to the application of the hair colour as per the present invention is minimized.

[0073] Thus, the present application helps deliver vibrant colour on hair in one single step, minimize the time, in a hassle-free application. Single step application helps the convenient to the end user and minimize the damage of the hair.

[0074] While the foregoing describes various embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

EXAMPLES

[0075] The present invention is further explained in the form of following examples. However, it is to be understood that the following examples are merely illustrative and are not to be taken as limitations upon the scope of the invention. Example 1

[0076] Formulations as per the present invention of various shades to the hair and control are given in Table 1 below: Table 1: Different colour bleach concentrate of the present formulations with control.

Formulation B &F: control batches

Formulation A &E: invention formula (best mode)

Formulation C, D, G & H: higher concentration / different ranges formula of present invention

[0077] Benefits from the invention: i) Dye uptake significantly higher than control, ii) Retention colour also higher compared to control, iii) Colour leach lower than control.

[0078] Compared the colour delivery of present invention with before and after treatment, the vibrant red hue noticed even in Black hair swatches and vibrant pink red tone noticed in grey hair and also delivers the 100% grey coverage (FIG. 1).

Example 2

[0079] Formulation as per the present invention of developer of the present invention and control are given in Table 2 below: Table 2: Different developer and control formulations.

Formulation- 1: control formula; Formulation-2 to Formulation-4: different concentration of oxidizing agent.

Example 3: Colour uptake measurement

[0080] The single bundle swatches were used for the complete study to avoid inconsistent results. Prepared hair swatches washed with water and surfactant solution for complete removal of any oil dirt and foreign materials. The chroma meter reading was carried out for the freshly prepared hair swatches, an average of six readings was taken by the instrument and take the average for the calculation.

[0081] Apply the treatment mixture to the hair swatch with help of a brush and kept aside for 30 minutes. After 30 minutes, wash the hair swatches with normal tap water until the water runs clear. Dry the washed swatches with a normal air dryer and kept the swatches aside for 2-3 hours and take the colour uptake readings. Then colour reading (L*a*b* values) was taken for coloured swatches by Chromameter as like as pre-reading. Dye uptake was calculated based on the below formula.

[0082] L scale: Lightness to darkness, where a low number (0-50) indicates dark and a high number (51-100) indicates light for initial colour uptake.

LI: before colouring and L2: After colouring a scale: Red to Green, where a positive number indicates red and a negative number indicates green for initial colour uptake. al: before colouring and a2: After colouring. b scale: Yellow to Blue, where a positive number indicates Yellow and a negative number indicates Blue for initial colour uptake. bl: before colouring and b2: After colouring.

[0083] Compared the colour delivery of invention with before and after treatment, the vibrant red hue noticed even in Black hair swatches and vibrant pink red tone noticed in grey hair and also delivers the 100% grey coverage, higher amount of ‘a’ value noticed in black swatches.

(i) Dye out spectrophotometer reading with and without penetrating aid on the developer formula

Table 3: Dye out spectrophotometer reading.

[0084] Colour uptake measurement is analyzed by AE value. The control in grey swatches showed AE value 38.524 whereas the treatment on grey swatches showed AE value 39.042. The higher value indicating grey colour uptake by the swatches. Similarly, the control on black swatches showed AE value 4.029 whereas the treatment on black swatches showed AE value 7.919 indicating the black colour uptake by the swatches as shown in Table 3.

(ii) Dye out spectrophotometer reading with different mixing ratio of powder bleach and developer

Table 4: Dye out in the black swatches in different mixing ratio.

[0085] Experiments were carried out with different ratios of powder bleach and developer. Mixing ratio of powder bleach and developer in 1:3.5 showed AE value of 15.8508 and the mixing ratio of powder bleach and developer in 1:4.0 showed AE value of 13.8914. Whereas 5 the AE value of 15.9599 was obtain in powder bleach and developer ratio 1:3 as shown in Table 4. Thus, it has been found that the optimum dosage level of mixing is 1:3 ratio, since the higher ratio i.e. 1:3.5 and 1:4 ratio delivers the dull colour, it delivers the less dye uptake also. It indicates that the higher ratio dilution diluted the dye concentration and impact the overall colour delivery. So optimise ratio of mixing is 1:3 i.e. one part of powder bleach 0 mixed with 3 part of developer for the colouring.

(iii) Dye out spectrophotometer reading to prove the synergistic effect of the invention (Red shade)

Table 5: Synergistic effect of the present invention.

5 [0086] The AE value of the control formulation was observed 1.9523. The control formulation and guar derivative showed the AE value of 3.6932. The control formulation and penetrating aid showed the AE value of 3.7150. Whereas the present invention showed AE value of 6.4900 as shown in Table 5. Results clearly indicates that the AE value was higher in black swatches with respect to the synergistic effect, higher AE value / dye uptake noticed in 0 the case of both the molecules presented formula, the individual alone treated delivers the higher AE value than control, however the synergistic combinations deliver the higher AE value than control and individual treatment. Significant red value (a2) increase noticed in the invention formula compared to the control and individual treatment.

Example 4

[0087] A comparison of the present formulation with commercial available product is given in Table 6. It has been observed from the comparative Table 6 that the present invention is better than the commercial available products.

Table 6: A comparative analysis of present invention with commercial available product.

Table 7: Customer likability ratings for the present invention compared with the same for the convention / regular formulation

[0088] It can be seen from the Table 6 and 7 above that the present invention exhibits superior technical effects in terms of delivering vibrant colour with ease of application at room temperature in a way that does not damage the hair.

[0089] The foregoing examples are merely illustrative and are not to be taken as limitations upon the scope of the invention. Various changes and modifications to the disclosed embodiments will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the scope of the invention.

Claims

We Claim:

1. A hair bleach and colour deposition formulation comprising: a first component; and a second component, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

2. The formulation as claimed in claim 1, wherein, the first component and the second component are present in a ratio of 1 :3.

3. The formulation as claimed in claim 1, wherein the first component comprising:

20 to 80 % w/w of an oxidizing agent;

20 to 40 % w/w of an alkalizing agent;

1 to 20 % w/w of a thickener;

0.001 to 10 % w/w of a dye;

0. 1 to 10 % w/w of a surfactant; and

0. 1 to 5 % w/w of a conditioner, wherein the % w/w is based on the total weight of the first component.

4. The formulation as claimed in claim 1, wherein the second component comprising:

1 to 20 % w/w of hydrogen peroxide;

1 to 10 % w/w of an emulsifier;

0. 1 to 2% w/w of a chelating agent;

0.05 to 2 % w/w of a stabilizer;

2 to 10 % w/w of a structural ingredient;

1 to 5 % w/w of a penetrating agent; and aqueous phase q.s. wherein the % w/w is based on the total weight of the second component.

5. The formulation as claimed in claim 3, wherein the oxidizing agent is selected from a group consisting of hydrogen peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide urea peroxide, sodium persulphate, potassium persulphate, ammonium persulphate, or a combination thereof.

6. The formulation as claimed in claim 3, wherein the alkalizing agents is selected from a group consisting of ammonium chloride, ammonium sulphate, ammonium nitrate, ammonium phosphate, ammonium acetate, ammonium carbonate, ammonium hydrogen carbonate, ammonium carbamate, ammonium hydroxide, ammonia or a combination thereof.

7. The formulation as claimed in claim 3, wherein the thickener is selected from carboxymethyl cellulose, carboxy vinyl polymers, hydroxyl ethyl cellulose, hydroxyl propyl cellulose, methyl cellulose, xanthan gum, carrageenan, alginic acid salts, pectin, gum arabic, gatch gum, karaya gum, tragacanth gum, agar powder, bentonite, cross linking polyacrylic acid salts or a combination thereof.

8. The formulation as claimed in claim 3, wherein the dye is selected from a group consisting of oxidative dyes and non-oxidative dyes.

9. The formulation as claimed in claim 3, wherein the surfactants have a lipophilic chain length of from about 8 to about 30 carbon atoms and is selected from a group consisting of anionic, amphoteric and cationic surfactants or a combination thereof.

10. The formulation as claimed in claim 3, wherein the conditioner is selected from a group consisting of natural derivatives of conditioners, silicone materials, amino silicones, polyquat or a combination thereof.

11. The formulation as claimed in claim 4, wherein the emulsifier is selected from a group consisting of Glyceryl stearate self emulsifier, Glyceryl mono sterate, PEG 100 stearate, Stearic acid, steramide AMP, stearamide AMP and glycol stearate, PEG8 propylene glycol cocoate; PEG8 propylene glycol cocoate and polyglyceryl 4- oleate, PEG 100 stearate and glyceryl stearate or a combination thereof.

12. The formulation as claimed in claim 4, wherein the chelating agent is selected from a group consisting of diamine-N,N'-dipolyacid, monoamine monoamide-N,N'-dipolyacid, and N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid chelants (e.g. EDDS (ethylenediaminedisuccinic acid)), carboxylic acids (e.g. aminocarboxylic acids), phosphonic acids (e.g. aminophosphonic acids), polyphosphoric acids (in particular straight polyphosphoric acids), salts and derivatives thereof, and combination thereof.

13. The formulation as claimed in claim 4, wherein the stabilizer is selected from a group consisting of soluble silicates, stannates, phosphonate, amino-carboxylic acid, nitric acid and its derivative and combination thereof.

14. The formulation as claimed in claim 4, wherein the structural ingredient is selected from a group consisting of lauric acid (C12), myristic (C14), palmitic acid (C16) and stearic acid (C 18) and combination thereof.

15. The formulation as claimed in claim 4, wherein the penetrating agent is selected from a group consisting of oleic acid, oleth phosphate, dioleyl phosphate, phosphate esters or a combination thereof.

16. A method of preparation of hair bleach and colour deposition formulation comprising: mixing 20 to 80 % w/w of an oxidizing agent in 1 to 20 % w/w of a thickener at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain a first mixture; blending 0.1 to 10 % w/w of a surfactant in 20 to 40 % w/w of an alkalizing agent with 0.1 to 5 % w/w of a conditioner at a temperature in the range of 15 to 30 °C for a period in the range of 10 to 15 min to obtain to form a second mixture; adding 0.001 to 10 % w/w of a dye to the second mixture followed by addition of the first mixture to the said mixture at a temperature in the range of 15 to 30 °C for a period in the range of 45 to 60 min to obtain a first component; mixing of 1 to 20 % w/w of hydrogen peroxide, 1 to 10 % w/w of an emulsifier, 0.1 to 2% w/w of a chelating agent, 0.05 to 2 % w/w of a stabilizer, 2 to 10 % w/w of a structural ingredient, 1 to 5 % w/w of a penetrating agent and aqueous phase q.s. to form a second component; and mixing of the first component with the second component to form a hair bleach and colour deposition formulation, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.

17. A method of apply colour to the hair comprising: taking dry and clear hair; mixing of the first component and the second component to form a paste; and applying the paste to the hair directly, leaving and followed by washing to get the coloured hair, wherein, the first component and the second component are present in a ratio in a range from 1:5 to 5: 1 and applying the formulation to the hair and leaving for 30 minutes and washing the hair after 30 minutes.