Oxidative hair colouring composition comprising a chelant mixture

Abstract

The presently claimed invention relates to an oxidative hair colouring composition comprising at least one oxidative coupler dye precursor (A), at least one oxidative primary dye precursor (B), a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine- N,N'-disuccinic acid, (D) at least one alkalizing agent, and (E) at least one oxidizing agent. Another aspect of the presently claimed invention relates to a kit comprising a tint composition comprising components (A), (B), (C) and (D), and a method of treating hair using the oxidative hair colouring composition.

Description

[0001] Oxidative Hair Colouring Composition comprising a chelant mixture

[0002] Field of the invention

[0003] The presently claimed invention relates to an oxidative hair colouring composition comprising at least one oxidative coupler dye precursor (A), at least one oxidative primary dye precursor (B), a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine- N,N'-disuccinic acid, (D) at least one alkalizing agent, and (E) at least one oxidizing agent. Another aspect of the presently claimed invention relates to a kit comprising a tint composition comprising components (A), (B), (C) and (D), and a method of treating hair using the oxidative hair colouring composition.

[0004] BACKGROUND OF THE INVENTION

[0005] Oxidative hair colouring is known since years. Consumers want to be able to colour their hair to many shades, while still having a pleasant and safe usage experience. This requires high lift of hair to deliver a wide range of shades with low or acceptable hair damage while having low or no ammonia smell during the application. In order to deliver a wide range of shades, a large number of dye precursors are used, and they need to be used at sufficient levels to achieve the desired shades.

[0006] Ammonia is often used to deliver high lift to obtain a wide variety of dye shades. Delivering high lift causes high damage on hair. Damage of hair includes, e.g., dryness, reduced elasticity, brittleness, split ends, dullness, matte appearance, reduced fullness, rough surface and reduced mechanical strength. Another drawback of the use of ammonia is the heavy smell of ammonia during application.

[0007] Monoethanolamine is currently often used within low odour hair colours. It also provides an acceptable level of hair lift and damage. However, it can produce high levels of unwanted dye I alkali adducts which limits the wide range of dye shade formation.

[0008] Permanent and demi-permanent oxidative hair colouring products have been used in professional salons and in retail products for use at home for decades. Colouring products typically comprise a tint composition and an oxidizing composition which are packaged separately and mixed immediately before use to form the colouring composition. The tint composition contains so-called oxidative dye precursors which are small molecules (typically oxidative primary dye precursors and oxidative coupler dye precursors) and an alkalizing agent, usually ammonia or an amine. These oxidative primary dye precursors react with the oxidative coupler dye precursors in the presence of an oxidizing agent to form larger, coloured dye products within the hair. The oxidizing composition contains the oxidizing agent to enable the colouring process. The oxidizing compositions typically contain a stabilized form of hydrogen peroxide and are sometimes referred to as the developer compositions.

[0009] The tint composition is thus mixed with the oxidizing composition immediately prior to the application to the hair to be coloured and the resulting mixture of the colouring composition is applied and left on the hair usually for 5 to 50 minutes before rinsing. The mixed colouring composition usually has an alkaline pH between about 8.5 and 10.5.

[0010] Oxidative hair colouring compositions comprising ammonia or an amine as alkalizing agent within the tint composition are often referred to as permanent hair colourants or "Level 3" hair colourants. Permanent hair colourants are for example marketed under the Koleston Perfect® brand name by Wella Professional in Europe.

[0011] Hydrogen peroxide, especially in the presence of an alkalizing agent, is capable of bleaching melanin, so that it is possible to obtain shades which are lighter or darker than the natural colour.

[0012] Demi-permanent hair colourants, also referred to as "Level 2" colourants, are also typically marketed as two-component systems. They also use oxidative primary dye precursors and oxidative coupler dye precursors as used in permanent hair colourants but differ in their use of alkalizing agents other than ammonia, in particular monoethanolamine (MEA) or aminomethylpropanol (2- amino-2-methylpropan-1-ol I AMP), and usually function at lower concentrations of hydrogen peroxide, typically 1 to 3 weight % (wt.%) in the mixed colouring composition compared to 3 to 6 or even higher wt.% for permanent "Level 3" colourants. Higher levels of hydrogen peroxide are, however, sometimes used when higher levels of colouring are sought (up to 8 wt.% hydrogen peroxide on the head for some shades). Demi-permanent hair colourants usually cause less melanin bleaching and thus less lift (i.e., removal) of natural hair colour. The resulting dyes may also penetrate less deeply in the hair shaft so that demi-permanent hair colourants can be less long lasting than permanent hair colourants. On the other hand, demi-permanent hair colourants are usually also less damaging to the hair structure than permanent hair colourants and the resulting hair colour may also be more natural looking. A further advantage is that demi-permanent hair colouring compositions do not have the strong ammonia smell of permanent hair colouring compositions and thus have a better consumer experience. A professional brand of demi-permanent hair colourants in Europe is for example Colour Touch® from Wella Professional in Europe. The mixed colouring composition usually has an alkaline pH of between about 8.5 and 10.5.

[0013] There is a need for providing hair colouring compositions that enable the formation of all desired colour shades and intensities and provide high levels of lift, while reducing the level of off-toning adduct species of oxidative dyes and giving a low level of hair damage without the formation of any unpleasant odour during use.

[0014] SUMMARY OF THE INVENTION

[0015] It is an object of the presently claimed invention to provide an oxidative hair colouring composition that enables the formation of a variety of colour shades and intensities and provide high levels of lift, while reducing the level of hair damage preferably without the formation of any unpleasant odour during use.

[0016] The object has been solved by using an oxidative hair colouring composition comprising as components

[0017] (A) at least one oxidative coupler dye precursor,

[0018] (B) at least one oxidative primary dye precursor,

[0019] (C) a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid, and salts thereof,

[0020] (D) at least one alkalizing agent, and

[0021] (E) at least one oxidizing agent. In one embodiment the oxidative hair colouring composition may optionally comprise one, two, or more of the following components:

[0022] (F) at least one cosmetically acceptable aqueous or aqueous-organic medium,

[0023] (G) at least one direct dye,

[0024] (H) at least one fatty substance,

[0025] (I) at least one surfactant,

[0026] (J) at least one thickener, and

[0027] (K) at least one gel network thickener system.

[0028] In another aspect, the presently claimed invention is directed to a kit comprising

[0029] (i) a tint composition comprising components (A), (B), (C) and (D) as defined in the present invention, and

[0030] (i) an oxidative composition comprising component (E) as defined in the present invention.

[0031] In yet another aspect, the presently claimed invention is directed to a method of treating hair comprising the steps of: a. providing the tint composition (i) comprising components (A), (B), (C) and (D) as defined in the present invention, b. providing an oxidative composition (ii) comprising component (E) as defined in the present invention, c. mixing the tint composition (i) and the oxidative composition (ii) to obtain a mixed oxidative hair colouring composition as defined in the present invention, d. applying the oxidative hair colouring composition onto the hair; e. leaving the oxidative hair colouring composition on the hair for a period in the range from > 5 to < 50 minutes; and f. subsequently rinsing the oxidative hair colouring composition from the hair.

[0032] In oxidative hair colouring composition disclosed in the state of the art generally chelant, like EDTA, are used for wrapping metal iones up by chelating. Surprisingly, it was found that the use of a chelant mixture (component (C)) comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid in an oxidative hair colouring composition leads to a lower damage of the hair per unit of lift.

[0033] Without being bound to a theory, it is assumed that bi- and trivalent metal cations, like iron cations or copper ions, contained in the water used during the hair treatment process when contacted with hydrogen peroxide comprised in the oxidative hair colouring composition leads to the formation of aggressive radicals leading to high hair damage.

[0034] The chelant mixture(component (C)) comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid, used in the inventive oxidative hair colouring composition seems to reduce the potency of the formation of aggressive radicals induced by bi- and trivalent metal cations. By consequence the oxidative hair colouring composition of the presently claimed invention leads to a reduction of hair damage per unit of lift.

[0035] The hair damage is measured via FTIR (Fourier Transform Infrared) method as described below in the examples. The lift (dL* value (given by L*inai- L*initiai)) is measured by a spectrophotometer as described below in the examples.

[0036] The hair damage per unit of lift is calculated by the formula: dFTIR / dL* Lower values means that the hair damage per unit of lift is lower.

[0037] DETAILED DESCRIPTION OF THE INVENTION

[0038] The following detailed description is merely exemplary in nature and is not intended to limit the presently claimed invention or the application and uses of the presently claimed invention. Furthermore, there is no intention to be bound by any theory presented in the preceding technical field, background, summary or the following detailed description.

[0039] The terms "comprising", "comprises" and "comprised of" as used herein are synonymous with "including", "includes" or "containing", "contains", and are inclusive or open-ended and do not exclude additional, non-recited members, elements or method steps. It will be appreciated that the terms "comprising", "comprises" and "comprised of" as used herein comprise the terms "consisting of", "consists" and "consists of".

[0040] Furthermore, the terms "(a)", "(b)", "(c)", "(d)" etc. and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the subject matter described herein are capable of operation in other sequences than described or illustrated herein. In case the terms “(A)”, “(B)” and “(C)” or "(a)", "(b)", "(c)", "(d)", "(i)", "(ii)" etc. relate to steps of a method or use or assay there is no time or time interval coherence between the steps, that is, the steps may be carried out simultaneously or there may be time intervals of seconds, minutes, hours, days, weeks, months or even years between such steps, unless otherwise indicated in the application as set forth herein above or below.

[0041] The term “about”, when used in relation to a weight ratio or a weight percentage, means that a specific value should be understood as meaning a range of ± 10 %. For example, the weight proportion of a compound of about 1 %, means a weight proportion ranging from 0.9 to 1.1 %. For example, the weight proportion of a compound of about 2.5 %, means a weight proportion ranging from 2.25 to 2.75 %. In another embodiment the term “about” can mean the exact value.

[0042] In the following passages, different aspects of the subject matter are defined in more detail. Each aspect so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.

[0043] Reference throughout this specification to "one embodiment" or “preferred embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the presently claimed invention. Thus, appearances of the phrases "in one embodiment" or “in a preferred embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment but may refer to different embodiments of the presently claimed invention. Furthermore, the features, structures or characteristics may be combined in any suitable manner, as would be apparent to a person skilled in the art from this disclosure, in one or more embodiments. Furthermore, while some embodiments described herein include some, but not other features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the subject matter, and form different embodiments, as would be understood by those in the art. For example, in the appended claims, any of the claimed embodiments can be used in any combination.

[0044] Furthermore, the ranges defined throughout the specification include the end values as well, i.e. a range of 1 to 10 implies that both 1 and 10 are included in the range. For the avoidance of doubt, the applicant shall be entitled to any equivalents according to applicable law.

[0045] For the purposes of the presently claimed invention, '% by weight’ or ‘wt.% ‘as used in the presently claimed invention is with respect to the total weight of the oxidative hair colouring composition. Further, the sum of wt.% of all the compounds (components), as described herein, in the respective compositions add up to 100 wt.%.

[0046] Every document cited herein, including any cross referenced or related patent or application, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests, or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

[0047] The measurement techniques described hereinabove and hereinafter are well known to a person skilled in the art and therefore do not limit the presently claimed invention.

[0048] By “oxidative hair colouring composition”, it is meant a ready-to-use composition which can change the colour of hair on which it is applied, and which preferably comprises an alkalizing agent, an oxidizing agent, and oxidative dyes (oxidative coupler dye precursor and oxidative primary dye precursor).

[0049] By “two-component” oxidative hair colouring composition it is meant an oxidative hair colouring composition which is obtained by mixing shortly before use two compositions: a tint composition and an oxidizing composition. The tint composition comprises the oxidative primary dye precursors, oxidative coupler dye precursors and the alkalizing agent. The oxidizing composition comprises the oxidizing agent. The term “two-component oxidative hair colouring composition” and the term “oxidative hair colouring composition” in the present case are used synonymously.

[0050] By "composition" it is meant a composition which is mixed by the user with one or more other composition for preparing the ready-to-use oxidative hair colouring composition to be applied to the hair. Hereinafter, the “hair colouring composition” refers to a use / mixed hair colouring composition.

[0051] By "user" it is meant the person preparing the hair colouring composition. The user is for example a professional hair stylist working in a salon and is different from the subject on whose hair the composition is applied, or the user is identical to the person on whose hair the composition is applied. The mixing can take place in a bowl or within a bottle or even through a mixer placed between the stored individual compositions and the point at which it is dispensed to be used. While two component oxidative hair colouring compositions are the most commonly found in the market, there are also others which use three or more components. For example, these colouring compositions comprise a tint composition and a separate alkali composition both of which are mixed in combination with the oxidizing composition to produce the colouring composition. In such a three-component system, the tint composition and the alkali composition are considered to be equivalent to the tint composition of a two-component system.

[0052] Alternatively, a tint composition, an anhydrous oxidizer composition and an aqueous composition can be mixed with the anhydrous composition to create the finished mixed colouring composition with the tint composition. In such a three-component system, the anhydrous oxidizer composition and the aqueous composition form the oxidizer composition of the two-component system. An anhydrous dye powder, tablet or granule can also be mixed with an aqueous alkali composition and an oxidizing composition.

[0053] Those skilled in the art are aware that there are multiple combinations of the components that can be interchanged to obtain the final mixed oxidative hair colouring composition. All these combinations are within the scope of the presently claimed invention which is exemplified in a non-limiting way.

[0054] By "lift" (or "lift power") it is meant the amount of lightening caused by the bleaching of the natural hair pigment melanin by using the oxidative hair colouring composition of the presently claimed invention. The amount of lift provided by different oxidative hair colouring compositions can be compared by using a human natural dark hair sample (e.g., dark hair of an individual of Chinese descent) and measuring the change of colour achieved following application of the compositions. The change in colour can be measured using well known parameters such as L*a*b* values. A composition can be said to provide a higher lift than another composition, when the resulting L* value or the so-called dL* value (given by L*final - L*initial) measured for a given treated sample of dark hair is higher for that composition than for the other composition, using the same experimental conditions. The denomination Level 2 (herein used interchangeably with "demi-permanent" or "tone-on-tone") and Level 3 (herein used interchangeably with "permanent") are commonly used in the hair colour trade to differentiate compositions with medium and high lift.

[0055] By "oxidizing agent" it is meant an electron accepting compound suitable for use in hair colouring compositions for removing the natural colour of hair (by destroying the melanin pigment) and reacting with oxidative primary dye precursors to enable the reaction with the oxidative coupler dye precursors to form the colour dye products. The most commonly used oxidizing agent in the art is hydrogen peroxide, however further suitable oxidizing agents that can be used in combination with hydrogen peroxide are described below. Oxidizing agents also include those which produce hydrogen peroxide when contacted with water. For example, sodium percarbonate, sodium perborate and urea peroxide can be used as anhydrous materials, which when contacted with water release hydrogen peroxide. For such oxidizing agents which product hydrogen peroxide when contacted with water, the wt.% of hydrogen peroxide within mixed colouring composition is considered as the level of oxidizing agent (E). By "alkalizing agent" it is meant one or more compounds suitable for raising the pH to alkaline level in mixed colouring compositions, in particular to a pH in the range of > 8.5 to < 10.5. Generally, the most commonly used alkalizing agents in the art are ammonia and monoethanolamine, however in the presently claimed invention also alkalizing agent other than ammonia (herein “nonammonia, non-monoethanolamine” alkalizing agent), can be used. The alkali agent is preferably used to raise the pH of the mixed colouring composition to a pH in the range of > 8.5 to < 10.5.

[0056] In a preferred embodiment the oxidative hair colouring composition of the presently claimed invention does not contain ammonia.

[0057] The below materials are being used in the embodiments of the presently claimed invention. The presently claimed invention is described with non-limiting embodiments. The listed ingredients are the preferred features as well as other preferred but non-limiting features of the presently claimed invention.

[0058] Formulation Chassis and Ingredients

[0059] In one embodiment the presently claimed invention is directed to an oxidative hair colouring composition comprising as components:

[0060] (A) at least one oxidative coupler dye precursor,

[0061] (B) at least one oxidative primary dye precursor,

[0062] (C) a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid,

[0063] (D) at least one alkalizing agent,

[0064] (E) at least one oxidizing agent, and optionally one, two, or more of the following components:

[0065] (F) at least one cosmetically acceptable aqueous or aqueous-organic medium,

[0066] (G) at least one direct dye,

[0067] (H) at least one fatty substance,

[0068] (I) at least one surfactant,

[0069] (J) at least one thickener, and

[0070] (K) at least one gel network thickener system. Common ingredients for the oxidative hair colouring formulations include, but are not limited to: alkalizers, solvents; water, oxidative dyes; direct dyes; oxidizing agents, like hydrogen peroxide; radical scavengers; thickeners and / or rheology modifiers; chelants; pH modifiers and buffering agents; carbonate ion sources; peroxymonocarbonate ion sources; anionic, cationic, non-ionic, amphoteric or zwitterionic surfactants, or mixtures thereof; anionic, cationic, non-ionic, amphoteric or zwitterionic polymers, or mixtures thereof; fragrances; enzymes; dispersing agents; peroxide stabilizing agents; antioxidants; catalysts, natural ingredients, e.g. proteins and protein derivatives, and plant extracts; conditioning agents including silicones and cationic polymers, ceramides, preserving agents, pigments, and opacifiers and pearling agents (such as titanium dioxide and mica). Some adjuvants referred to above, but not specifically described below, which are suitable are listed in the International Cosmetics Ingredient Dictionary and Handbook, (8th ed.; The Cosmetics, Toiletry, and Fragrance Association). Particularly, vol. 2, sections 3 (Chemical Classes) and 4 (Functions) are useful in identifying specific adjuvants to achieve a particular purpose or multipurpose.

[0071] Examples of formulation chassis for the tint component can be found for example in patent literature or adapted from existing commercial products, especially products comprising non-ammonia alkalizing agents such as from the ColourTouch® range marketed by Wella, INOA® range marketed by L’Oreal or Essensity® range marketed by Schwarzkopf. The components may for example be formulated and delivered as aqueous hair product, emulsion, gel, aerosol, or foam.

[0072] The oxidative hair colouring compositions of the presently claimed invention preferably further comprises any usual hair colouring chassis ingredients and may use any common ingredients, known in the field as long as they are compatible with the requirements set in the claims.

[0073] In the present case the terms “(A)”, “component (A)”, “at least one oxidative coupler dye precursor (A)”, and “at least one oxidative coupler dye precursor” are used synonymously, and therefore have preferably the same meaning. In one embodiment of the presently claimed invention, the oxidative hair colouring composition comprises as component (A) at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4- chlororesorcinol, 2-chlororesorcinol, 2-methylresorcinol, m-aminophenol, 4- amino-2-hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 3-amino-2,6- dimethylphenol, 3-amino-2,4-dichlorophenol, 5-amino-6-chloro-o-cresol, 5- amino-4-chloro-o-cresol, hydroxybenzomorpholine, 2-amino-5-ethylphenol, 6- amino-m-cresol, 6-amino-o-cresol, 2,4-diaminophenoxyethanol, 2-amino-4- hydroxyethylaminoanisole, 1 ,3-bis-(2,4-diaminophenoxy)propane, 2,6- dihydroxyethylaminotoluenep, m-phenylenediamine, 2,4-diamino-1 ,5-di(2- hydroxyethoxybenzene, 1 -naphthol, 2-methyl-1 -naphthol, 1 ,5-naphthalenediol, 2,7-naphthalenediol, 1 -acetoxy-2-methylnaphthalene, 2,6-dihydroxy-3,4- dimethylpyridine, 2,6-dimethoxy-3,5-pyridinediamine, 3-amino-6-methoxy-2- (methylamino)-pyridine, 2-amino-3-hydroxypyridine, 2,6-diaminopyridine, dihydroxyindole, 6-hydroxyindole, dihydroxyindoline, phenyl methyl pyrazolone, 1 ,2,4-trihydroxybenzene, 5-((2-hydroxyethyl)amino)-1 ,3-benzodioxol, isatin, hydroquinone, 4-formyl-1-methylquinolinium-p-toluenesulfonate and salts thereof.

[0074] These and other primary dye precursors and coupler dye precursors (component (A)) may be used in different combination to achieve the nuance sought, as is known in the art.

[0075] In a preferred embodiment of the presently claimed invention, the oxidative hair colouring composition comprises as component (A) at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4- chlororesorcinol, 2-chlororesorcinol, 2-methylresorcinol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol, 2-methyl-5- hydroxyethylaminophenol, 5-((2-hydroxyethyl)amino)-1 ,3-benzodioxol and salts thereof.

[0076] All weight amounts (wt.%) given in the present invention in view of oxidative coupler dye precursors comprised in component (A) are in each case calculated on basis of the oxidative coupler dye precursors in form of the free base.

[0077] In the tint composition component (A) is generally present in an amount of 0.001 to 3 %by weight based on the total weight of the tint composition. In the oxidative hair colouring composition component (A) is generally present in an amount of 0.001 to 1.5 % by weight, preferably in an amount of 0.001 to 1.1 % by weight and more preferably in an amount of 0.001 to 1.0 % by weight, based on the total weight of the oxidative hair colouring composition.

[0078] Component (B)

[0079] In the present case the terms “(B)”, “component (B)”, “at least one one oxidative primary dye precursor (B)”, and “at least one oxidative primary dye precursor” are used synonymously, and therefore have preferably the same meaning.

[0080] In one embodiment of the presently claimed invention, the oxidative hair colouring composition comprises as component (B) at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5- diamine, p-phenylenediamine, n-phenyl-p-phenylenediamine, N,N-bis(2- hydroxyethyl)-p-phenylenediamine, hydroxyethyl-p-phenylenediamine sulphate, hydroxypropyl bis(n-hydroxyethyl-p-phenylenediamine), 2-methoxymethyl-p- phenylenediamine, 2-chloro-p-phenylenediamine, p-aminophenol, p- methylaminophenol, 4-amino-m-cresol, 6-amino-m-cresol, bis(5-amino-2- hydroxyphenyl)methane, tetraaminopyrimidine, 2,5,6-triamino-4-pyrimidinol, 4,5-diamino-1-(2-hydroxyethyl)pyrazol 2,3-diaminodihydroxypyrazolopyrazolone dimethosulfonate, 4,5-diamino-1-hexylpyrazol, hydroxypropyl-p- phenylenediamine, dimethylpiperazinium aminopyrazolopyridine chloride hydrochloride, methylimidazoliumpropyl p-phenylenediamine, hydroxyethoxy aminopyrazolopyridine and salts thereof.

[0081] In a preferred embodiment of the presently claimed invention, the oxidative hair colouring composition comprises as component (B) at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5- diamine, hydroxypropyl-p-phenylenediamine, 2-methoxymethyl-p- phenylenediamine and salts thereof.

[0082] All weight amounts (wt.%) given in the present invention in view of oxidative primary dye precursors comprised in component (B) are in each case calculated on basis of the oxidative primary dye precursors in form of the free base.

[0083] In the tint composition component (B) is generally present in an amount of 0.001 to 7.5 %by weight based on the total weight of the tint composition. In the oxidative hair colouring composition component (B) is generally present in an amount of 0.001 to 4.0 % by weight, preferably in an amount of 0.001 to 3.0 % by weight and more preferably in an amount of 0.001 to 2.5 % by weight, based on the total weight of the oxidative hair colouring composition.

[0084] In the present case the terms “(C)”, “component (C)”, “chelant mixture (C)”, and “at chelant mixturer” are used synonymously, and therefore have preferably the same meaning.

[0085] The chelant mixture comprises diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid, and salts thereof.

[0086] Diethylenetriamine penta(methylene phosphonic acid) is also known under the IIIPAC name as {[(Phosphonomethyl)azanediyl]bis[ethane-2,1- diylnitrilobis(methylene)]}tetrakis (phosphonic acid) and has the CAS number 15827-60-8. The abbreviation for diethylenetriamine penta(methylene phosphonic acid) is DTPMP.

[0087] DTPMP is normally used as salts, because the acid form has very limited solubility in water and tends to crystallize in concentrated aqueous solutions. Preferably the pentasodium salt of DTPMP is used having the CAS number 22042-96-2.

[0088] The wording “diethylenetriamine penta(methylene phosphonic acid)” and “DTPMP” in the present invention includes the free acid as well as salts of DTPMP.

[0089] Ethylenediamine-N,N'-disuccinic acid has the CAS numer 20846-91-7. The abbreviation for ethylenediamine-N,N'-disuccinic acid is EDDS. EDDS has two chiral centers, and as such three stereoisomers. These are the enantiomeric (R,R) and (S,S) isomers and the achiral meso (R,S) isomer.

[0090] The wording “ethylenediamine-N,N'-disuccinic acid” and “EDDS” in the present invention includes the free acid as well as salts of EDDS. In the chelant mixture used in the presently claimed invention preferably (S,S) ethylenediamine-N,N'-disuccinic acid ((S,S) EDDS) is used.

[0091] The wording “ethylenediamine-N,N'-disuccinic acid” and “EDDS” in the present invention includes the free acid as well as salts of EDDS.

[0092] In a preferred embodiment the chelant mixture comprises DTPMP, EDDS and EDTA, and salts thereof. EDTA is the abbreviation for ethylenediaminetetraacetic acid having the CAS number 60-00-4. EDTA is available as free acid or in the form of several salts, like disodium EDTA, sodium calcium EDTA, and tetrasodium EDTA.

[0093] The wording “ethylenediaminetetraacetic acid” and “EDTA” in the present invention includes the free acid as well as salts of EDTA.

[0094] The chelant mixture comprised in the inventive oxidative hair colouring composition beside DTPMP, EDDS and optionally EDTA in one embodiment may contain one, two or more further chelants selected from the group consisting of hydroxyethyl ethylenediamine triacetic acid (HEDTA), ethylenediamine-N,N'-diglutaric acid (EDDG), 2-hydroxypropylenediamine-N,N'- disuccinic acid (HPDDS), N,N-dicarboxymethylglutamic acid (GLDA), glycinamide-N,N'-disuccinic acid (GADS), ethylenediamine-N-N'-bis(ortho- hydroxyphenyl acetic acid) (EDDHA), dimethyl glucamine (DMG), N-(1- carboxyethyl)iminodiacetic acid, methylglycine N,N-diacetic acid (MGDA), amino trimethylene phosphonic acid (ATMP) and salts thereof.

[0095] All weight amounts (wt.%) given in the present invention in view of chelants comprised in the chelant mixture (component (C)) are in each case calculated on basis of the chelants in form of the free acid.

[0096] In other words, if the amount of DTPMP comprised in the oxidative colouring composition in wt.% is given, the amount of DTPMP in wt.% is calculated based ofn DTpMP in form of a free acid and not based on DTPMP in form of a salt. The same holds true for EDDS, EDTA and any other chelant that optionally might be comprised in the oxidative colouring composition.

[0097] In a preferred embodiment the oxidative hair colouring composition comprises the chelant mixture (component (C)) in an amount in the range from > 0.20 wt.% to < 1.5 wt.%, based on the total weight of the oxidative hair colouring composition.

[0098] The amount of the chelant mixture at present means the amount of all chelants comprised in the chelant mixture, preferably comprised in the oxidative hair colouring composition.

[0099] In a preferred embodiment component (C) comprises a mixture of

[0100] 0.1 to 1.3 wt.% of DTPMP,

[0101] 0.1 to 1.29 wt.% of EDDS, and

[0102] 0.0 to 0.2 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0103] In another preferred embodiment component (C) comprises a mixture of

[0104] 0.3 to 0.7 wt.% of DTPMP,

[0105] 0.1 to 0.15 wt.% of EDDS, and

[0106] 0.0 to 0.15 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0107] In an especially preferred embodiment component (C) comprises a mixture of 0.1 to 1.29 wt.% of DTPMP,

[0108] 0.1 to 1.29 wt.% of EDDS, and

[0109] 0.01 to 0.2 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0110] In a particularly preferred embodiment component (C) comprises a mixture of 0.3 to 0.7 wt.% of DTPMP,

[0111] 0.1 to 0.15 wt.% of EDDS, and

[0112] 0.05 to 0.15 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0113] In a preferred embodiment the weight ratio of DTPMP to EDDS in the oxidative hair colouring composition is higher than 1 . In a preferred embodiment the chelant mixture (component (C)) beside DTPMP, EDDS and optionally EDTA contains less than 10 wt.-% of further chelants, based on the total weight of component (C) comprised in the oxidative hair colouring composition.

[0114] In a more preferred embodiment the chelant mixture (component (C)) beside DTPMP, EDDS and optionally EDTA does not contain a further chelant. In another preferred embodiment the oxidative hair colouring composition beside DTPMP, EDDS and optionally EDTA does not contain a further chelant.

[0115] Component (D)

[0116] In the present case the terms “(D)”, “component (D)” and “at least one alkalizing agent” are used synonymously, and therefore have preferably the same meaning. The term “at least one alkalizing agent” means exactly one alkalizing agent and, also a mixture of two or more different alkalizing agents.

[0117] In a preferred embodiment in the oxidative hair colouring composition component (D) is at least one alkalizing agent selected form the group consisting of 2-amino-1 -propanol, 2-amino-1 -butanol, 2-dimethylamino-2-pethyl- 1 -propanol, 2-amino-2-methylpropan-1 -ol, 3-amino-1 -propanol, ammonia, and monoethanolamine, wherein 2-amino-1 -propanol and monoethanolamine are especially preferred.

[0118] In a preferred embodiment component (D) does not contain ammonia. In anoter preferred embodiment the oxidative hair colouring composition does not contain ammonia.

[0119] In a preferred embodiment component (D) is a mixture of 2-amino-1 -propanol and monoethanolamine.

[0120] In an especially preferred embodiment component (D) is monoethanolamine.

[0121] All weight amounts (wt.%) given in the present invention in view of the at least on alkalizing agent (component (D)) are in each case calculated on basis of the alkalizing agent in form of the free base. In one embodiment component (D) is present in an amount in the range of > 0.1 wt.% to < 10.0 wt.%, preferably in an amount in the range of > 0.1 wt.% to < 7.0 wt.%, particular preferred in an amount in the range of > 1.0 wt.% to < 6.3 wt.%, and most preferred in an amount in the range of > 1.0 wt.% to < 2.5 wt.%, in each case based on the total weight of the oxidative hair colouring composition.

[0122] In a preferred embodiment component (D) comprises a mixture of

[0123] 0.5 to 2.0 wt.% of 2-amino-1 -propanol, and

[0124] 0.5 to 2.0 wt.% of monoethanolamine, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0125] In an more preferred embodiment component (D) comprises a mixture of 0.75 to 1.25 wt.% of 2-amino-1 -propanol, and 0.75 to 1 .25 wt.% of monoethanolamine, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0126] In a preferred embodiment the component (D) beside 2-amino-1 -propanol, and monoethanolamine, contains less than 10 wt.-% of further alkalizing agent(s) based on the total weight of component (D) comprised in the oxidative hair colouring composition.

[0127] Component (E)

[0128] In the present case the terms “(E)”, “component (E)” and “at least one oxidizing agent” are used synonymously, and therefore have preferably the same meaning. The term “at least one oxidizing agent” means exactly one oxidizing agent and, also a mixture of two or more different oxidizing agents.

[0129] The oxidizing agents are preferably water-soluble inorganic peroxide materials which are capable of yielding hydrogen peroxide in an aqueous solution.

[0130] In one embodiment of the presently claimed invention, the at least one oxidizing agent is selected from the group consisting of hydrogen peroxide, inorganic alkali metal peroxides (such as sodium periodate and sodium peroxide), organic peroxides (such as urea peroxide, melamine peroxide), inorganic perhydrate salt bleaching compounds (such as the alkali metal salts of perborates, percarbonates, perphosphates, persilicates, persulphates), and mixtures thereof; preferably from the group consisting of hydrogen peroxide, persulphates, and mixtures thereof; most preferably the oxidizing agent is hydrogen peroxide.

[0131] "Water-soluble," as defined herein, means that in standard condition at least 0.1 g, 1 g, or 10 g of the oxidizing agent can be dissolved in 1 liter of deionized water.

[0132] In one embodiment, the component (E) is preferably present in an amount in the range of > 1.0 wt.% to < 8.0 wt.%, more preferably in an amount in the range from of > 1.0 wt.% to < 6.0 wt.%, more preferably in an amount in the range from of > 1.2 wt.% to < 5.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0133] The oxidizing agents can be provided in aqueous solution or as a powder which is dissolved prior to use.

[0134] In the present case the terms “(F)”, “component (F)” and “at least one cosmetically acceptable aqueous or aqueous-organic medium” are used synonymously, and therefore have preferably the same meaning. The term “at least one cosmetically acceptable aqueous or aqueous-organic medium” means exactly one cosmetically acceptable aqueous or aqueous-organic medium and, also a mixture of two or more different cosmetically acceptable aqueous or aqueous-organic mediums.

[0135] In an embodiment, the oxidative hair colouring composition comprises the cosmetically acceptable aqueous or aqueous-organic medium (component (F)) in an amount in the range of > 30.0 to < 95.0 wt.%, preferably in an amount in the range of > 35.0 to < 92.0 wt.%, more preferably in an amount in the range of > 40.0 to < 90.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0136] If component (F) is a cosmetically acceptable aqueous medium it preferably consists of water. The cosmetically acceptable aqueous-organic medium (component (F)) preferably consists of water and a water miscible organic solvent such as an alcohol. The cosmetically acceptable aqueous-organic medium (component (F)) preferably comprises water and a monoalcohol such as ethanol and isopropanol and / or a polyalcohol such as propylene glycol, hexylene glycol, glycerin, and propane diol.

[0137] In a preferred embodiment component (F) comprises the organic medium as a major component.

[0138] Component (G)

[0139] In the present case the terms “(G)”, “component (G)” and “at least one direct dye” are used synonymously, and therefore have preferably the same meaning. The term “at least one direct dye” means exactly one direct dye and, also a mixture of two or more different direct dyes.

[0140] Direct dyes may also be incorporated in any of components of the presently claimed invention, in particular in the tint composition. The compositions of the presently claimed invention may also comprise compatible direct dyes, in an amount that is sufficient to provide additional colouring, particularly with regard to intensity. Typically, such an amount will range from 0.005% wt.% to 4.0 wt.%, based on the total weight of the oxidative hair colouring composition. When the oxidative hair colouring composition is obtained by mixing a tint composition and an oxidizing composition, the direct dyes are usually incorporated in the tint composition.

[0141] In one embodiment of the presently claimed invention, direct dyes are selected from the group consisting of Acid Yellow 1 , Disperse Red 17, Acid Yellow 9, Pigment Red 49, Acid Yellow 11 , Acid Black 1 , 4-Nitro-1 ,2-phenylenediamine, Picramic acid, HC Red 13, N,N'-Bis(2-hydroxyethyl)-2-nitro-p- phenylenediamine, HC Yellow 5, HC Red 7, HC Blue 2, HC Yellow 4, HC Yellow 3, HC Blue 1 , HC Yellow 2, HC Orange 1 , 2-Hydroxyethylamino-5- nitroanisole, 3-Nitro-p-hydroxyethylaminophenol, 3-Methylamino-4- nitrophenoxyethanol, 2-Nitro-5-glyceryl methylaniline, HC Violet 1 , HC Orange 2, HC Orange 3, HC Yellow 9, 4-Nitrophenyl aminoethylurea, HC Red 10, HC Red 11 , 2-Hydroxyethyl picramic acid, HC Blue 12, HC Yellow 6, Hydroxyethyl- 2-nitro-p-toluidine, HC Yellow 12, HC Blue 11 , HC Blue 10, HC Blue 6, HC Yellow 7, HC Yellow 10, HC Blue 9, HC Blue 13, 2-Chloro-6-(ethylamino)-4- nitrophenol, 6-Nitro-2,5-pyridinediamine, HC Violet 2, 2-Amino-6-Chloro-4- Nitrophenol, 4-Hydroxypropylamino-3-nitrophenol, Acid Blue 7, HC Yellow 13, HC Red 14, HC Yellow 15, HC Yellow 14, 2,6-Diamino-3-((pyridin-3- yl)azo)pyridine, Basic Orange 69, HC Red 16, Basic violet 2, Basic Red 51 , Basic Yellow 87, Basic Orange 31 , HC Blue 16, HC red 17, HC Yellow 17, HC blue 18, HC Yellow 16, HC Red 18, HC Orange 6, Basic Orange 1 , Basic Red 76, Basic Brown 16, Basic Yellow 57, CI14700, Acid Red 14, Acid Orange 7, Acid Red 88, FD&C Yellow 6, Acid Red 27, Acid Orange 10, Acid Red 33, Acid red 155, Acid Yellow 23, Food Black 2, Cl 28440, HC Brown 2, Acid Blue 1 , Acid Blue 3, Acid Blue 9, Acid Violet 49, Cl 42735, Basic Blue 26, Acid violet 9, Acid Red 92, Acid Yellow 3, Beta-Carotene, Cl 50420, Basic Blue 99, 1-Amino- 4-hydroxy-9,10-anthracendion, Cl 60725, Acid violet 43, Disperse Violet 1 , Acid blue 62, Copper phthalocyanine, Carbon black, Disperse Black 9, Lycopene, Hydroxyanthraquinoneaminopropyl methyl morpholinium methosulfate, HC Blue 8, HC Green 1 , Curry red, 2-Hydroxy-1 ,4-naphthoquinone, Cl 77289, Solvent Green 7, Lawsonia Inermis Cera, Cl 73000, Indigofera tinctoria, Carmines, HC Blue 14, Acid Red 18, Cl 42053, Acid Red 52, Acid Green 25, Disperse Blue 377, Pigment Red 57, HC Blue 15, Tetrabromphenol Blue, Cationic Blue 347, Bromthymol blue sodium, Anthocyanins, Chlorophyllin-Copper complex, Annatto, Natural Green 3, Betanin, Capsanthin, Basic Yellow 29 and combinations thereof.

[0142] Component (H)

[0143] In the present case the terms “(H)”, “component (H)” and “at least one fatty substance” are used synonymously, and therefore have preferably the same meaning. The term “at least one fatty substance” means exactly one fatty substance and, also a mixture of two or more different fatty substances.

[0144] In one embodiment of the presently claimed invention, the oxidative hair colouring composition preferably comprises at least one fatty substance that does not contain any free carboxylic acid groups, i.e. free of -C(=O)-OH groups and -C(=O)-O’ groups. The term "fatty substance" means an organic compound that is insoluble in water at room temperature (25°C) and at atmospheric pressure (< 15 mg / L water, preferably < 5 mg / L water). In addition, under the same temperature and pressure conditions, the fatty substances are soluble in organic solvents such as chloroform, ethanol, or benzene.

[0145] In a preferred embodiment of the presently claimed invention, the fatty substances are selected from the group consisting of liquid hydrocarbons, non- silicone oils of animal, plant, mineral or synthetic origin, fatty alcohols, fatty acid esters and / or fatty alcohol esters, non-silicone waxes, and silicones or mixtures thereof.

[0146] More particularly, the liquid hydrocarbons are selected from the group consisting of: linear or branched, optionally cyclic, C6-C16 alkanes such as hexane, undecane, dodecane, tridecane, and isoparaffins, such as isohexadecane, isododecane and isodecane, linear or branched hydrocarbons of mineral, animal or synthetic origin with more than 16 carbon atoms, such as volatile or non-volatile liquid paraffins and derivatives thereof, petroleum jelly, liquid petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam®, and squalane.

[0147] In a preferred embodiment of the presently claimed invention, the liquid hydrocarbons are selected from the group consisting of volatile or non-volatile liquid paraffins, and liquid petroleum jelly.

[0148] The oxidative hair colouring compositions of the presently claimed invention preferably comprises an amount of fatty substances that do not contain any free carboxylic acid groups of > 2 wt.%, more preferably >10 wt.%, even more preferably > 20 wt.%, most preferably > 30 wt.%, based on the total weight of the oxidative hair colouring composition.

[0149] In a further embodiment of the presently claimed invention, the oxidative hair colouring composition comprises fatty substances in an amount in the range from > 2.0 wt.% to < 70.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0150] In one embodiment of the presently claimed invention, a creamy carrier for the tint composition preferably comprises from > 10.0 wt.% to < 30 wt.% of at least one fatty alcohol with 10 to 24 carbon atoms; and / or one or more of > 0.2 wt.% to < 6.0 wt.% of at least one diester of formula: R1-CO-O-(CH2-CH2-O)n-CO-R2, where n is 1 , 2 or 3, and R1and R2are the same or different alkyl radicals with 12 to 20 carbon atoms; and / or one or more of > 0.5 wt.% glycerine fatty acid ester with 10 to 24 carbon atoms; and / or one or more of > 0.1 wt.% to < 10 wt.% of non-ionic and / or anionic and / or ampholytic emulsifiers, based on the total weight of the tint composition.

[0151] Lower levels of fatty alcohol can also be used in this chassis, if a less thick composition is desired, for example a level of from > 2.0 % wt.% to < 10 wt.% of at least one fatty alcohol with 10 to 24 carbon atoms can be used.

[0152] The formulations disclosed in WO 98 / 11863A2 may also be used as a reference for the presently claimed invention. The formulations disclosed in this reference document contain a beeswax-protein hydrolysate-and / or amino acid association, which however may or may not be present in the tint component of the presently claimed invention.

[0153] In one embodiment of the presently claimed invention, the oxidative hair colouring composition may be a three-component system, as exemplified in US 2010 / 0223739 A2, in which case the oxidative hair colouring composition comprising at least one fatty substance (H) and at least one surfactant (I) as defined in this document may be considered as a third composition.

[0154] In the present case the terms “(I)”, “component (I)” and “at least one surfactant” are used synonymously, and therefore have preferably the same meaning. The term “at least one surfactant” means exactly one surfactant and, also a mixture of two or more different surfactants.

[0155] The at least one surfactant (I) is preferably anionic, cationic or non-ionic. The at least one surfactant (I) is preferably a non-ionic surfactant which is selected from the group consisting of fatty alcohol polyoxyalkylene esters, alkyl polyoxyalkylene ethers which are derived from C1-C6-alcohols or from C7-C30- fatty alcohols, alkylaryl alcohol polyoxyethylene ethers, alkoxylated animal and / or plant fats and / or oils, glycerol esters, alkylphenol alkoxylates, fatty amine alkoxylates, fatty acid amide and fatty acid diethanolamide alkoxylates, ethoxylates thereof, sugar surfactants, sorbitol esters, polyoxyethylene sorbitan fatty acid esters, alkyl polyglycosides, N-alkylgluconamides, alkyl methyl sulfoxides and alkyl dimethyl phosphine oxides.

[0156] In the present case the terms “(J)”, “component (J)” and “at least one thickener” are used synonymously, and therefore have preferably the same meaning. The term “at least one thickener” means exactly one thickener and, also a mixture of two or more different thickeners.

[0157] The oxidative hair colouring compositions of the presently claimed invention preferably comprises a thickener, in particular a polymeric thickener in an amount that is sufficient to impart a viscosity to the composition that allows for its ready application to hair without unduly dripping off the hair, as is known in the art. Typically, such an amount will be at least about 0.1 wt.%, in some embodiments, at least about 0.5 wt.%, in other embodiments, at least about 1.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0158] Examples of commonly used associative polymeric thickeners are sold under the tradename Aculyn-22 and Aculyn-33 by the company Rohm & Haas, Permulen TR1 , Carbopol 2020, Carbopol Ultrez-21 by the company Noveon, and Structure 2001 and Structure 3001 by the company National Starch. Other suitable polymers include polyether polyurethanes, for example Aculyn-44 and Aculyn-46 by the company Rohm and Haas. Another suitable associative polymer is cellulose modified with groups comprising at least one C8 - C30 fatty chain, such as the product Natrosol Plus Grade 330 CS sold by the company Aquaion.

[0159] In one embodiment of the presently claimed invention the hair colouring composition comprises salt tolerant thickeners, including but not limited to: xanthan, guar, hydroxypropyl guar, scleroglucan, methyl cellulose, ethyl cellulose (available as AQUACOTE®, hydroxyethyl cellulose (NATROSOL®), carboxymethyl cellulose, hydroxypropylmethyl cellulose, microcrystalline cellulose, hydroxybutylmethyl cellulose, hydroxypropyl cellulose (available as KLUCEL®), hydroxyethyl ethyl cellulose, cetyl hydroxyethyl cellulose (available as NATROSOL® Plus 330), N-vinylpyrrolidone (available as POVIDONE®), Acrylates / Ceteth-20 Itaconate Copolymer (available as STRUCTURE® 3001 ), hydroxypropyl starch phosphate (available as STRUCTURE® ZEA), polyethoxylated urethanes or polycarbamyl polyglycol ester (e.g. PEG- 150 / Decyl / SMDI copolymer (e.g. ACULYN® 44), PEG- 150 / Stearyl / SMDI copolymer (available as ACULYN® 46), trihydroxystearin (available as THIXCIN®), acrylates copolymer (e.g. available as ACULYN® 33) or hydrophobically modified acrylate copolymers (e.g. Acrylates I Steareth-20 Methacrylate Copolymer (available as ACULYN® 22), acrylates / steareth-20 methacrylate crosspolymer (available as ACULYN® 88), acrylates / vinyl neodecanoate crosspolymer (available as ACULYN® 38), acrylates / beheneth- 25 methacrylate copolymer (available as ACULYN® 28), acrylates / C 10-30 alkyl acrylate crosspolymer (available as Carbopol® ETD 2020), non-ionic amphophilic polymers comprising at least one fatty chain and at least one hydrophilic unit selected from polyether urethanes comprising at least one fatty chain,.

[0160] In one embodiment of the presently claimed invention, the oxidative hair colouring composition comprises at least one mineral thickener selected from organophilic clays, fumed silicas, or mixtures thereof. The at least one mineral thickener is present in an amount ranging from > 1 .0 to < 30 wt.%, based on the total weight of the oxidative hair colouring composition.

[0161] In one embodiment of the presently claimed invention, the organic thickener is selected from cellulose-based thickeners (hydroxyethycellulose, hydroxypropyl cellulose, carboxymethylcellulose), guar gum and derivatives thereof (hydroxypropyl guar), gums of microbial origin (xanthan gum, scleroglucan gum), crosslinked homopolymers of acrylic acid or of acrylamido- propanesulfonic acid, and cellulose-based thickeners, such as hydroxyethylcellulose. The at least one organic thickener is present in an amount ranging from > 0.1 to < 20 wt.%, based on the total weight of the oxidative hair colouring composition.

[0162] Component (K)

[0163] In the present case the terms “(K)”, “component (K)” and “at least one gel network thickener system” are used synonymously, and therefore have preferably the same meaning. The term “at least one gel network thickener system” means exactly one gel network thickener system and, also a mixture of two or more different gel network thickener systems.

[0164] The gel network thickener system is typically provided in the tint composition and subsequently mixed with the oxidizing composition whilst retaining the gel like network system in the resultant mixed colouring composition. Such gel network thickener systems comprise a surfactant and a fatty alcohol.

[0165] In one embodiment of the presently claimed invention, the gel network system preferably comprises a linear or branched C14 to C30 fatty alcohol, preferably selected from the group consisting of cetyl alcohol, stearyl alcohol, cetostearyl alcohol or behenyl alcohols or mixtures thereof. According to the presently claimed invention the tint composition preferably comprises from > 1 .0 wt.% to < 18.0 wt.%, more preferably from > 2.0 wt.% to < 12.0 wt.% of fatty alcohol.

[0166] In one embodiment of the presently claimed invention, the gel network system preferably comprises anionic, cationic or non-ionic surfactant or amphophile.

[0167] The gel network thickener system preferably comprises at least one anionic surfactant selected from C8 to C30 alkyl phosphate, C8 to C30 alkyl ether phosphate or mixtures thereof, and a C14 to C30 fatty alcohol. Other anionic gel network forming surfactants may also be used.

[0168] The gel network thickener system preferably comprises at least one non-ionic surfactant selected from the group consisting of fatty alcohol polyoxyalkylene esters, alkyl polyoxyalkylene ethers which are derived from C7-C30-fatty alcohols, alkylaryl alcohol polyoxyethylene ethers, alkoxylated animal and / or plant fats and / or oils, glycerol esters, alkylphenol alkoxylates, fatty amine alkoxylates, fatty acid amide and fatty acid diethanolamide alkoxylates, ethoxylates thereof, sugar surfactants, sorbitol esters, polyoxyethylene sorbitan fatty acid esters, alkyl polyglycosides, N-alkylgluconamides, alkyl methyl sulfoxides and alkyl dimethyl phosphine oxides.

[0169] Representative examples of anionic surfactants include salts (such as alkaline salts, for example, sodium salts, ammonium salts, amine salts, amino alcohol salts and magnesium salts) of the following compounds: alkyl ether carboxylates, alkyl ether sulphates, alkyl glyceryl sulphonates, alkylamido ether sulphates, alkylarylpolyether sulphates, alkyl monoglyceride sulphates, alkyl ether sulphonates, alkylamide sulphonates; alkyl succinates, alkyl sulphosuccinates, alkyl ether sulphosuccinates, alkylamide sulphosuccinates; alkyl sulphosuccinamates; alkyl sulphoacetates; alkyl ether phosphates; acyl sarcosinates, N-acyl methylaminopropionate; acyl isethionates, N-acyl taurates; acyl lactylates; carboxyalkyl ether of alkyl polyglucosides; alkyl lecithin derivatives. The alkyl or acyl radical of all of these various compounds, for example, comprises from about 8 to 30 carbon atoms, and the aryl radical, for example, is chosen from phenyl and benzyl groups.

[0170] Anionic surfactants include alkyl ether phosphates, alkyl ether sulphates, alkyl glyceryl sulphonates, N-acyl sarcosinates, N-acyl taurates, acyl lactylates and carboxyalkyl ether of alkyl polyglucosides. Yet more preferable surfactants are selected from alkyl ether phosphates having an average 1 to 20, 1 to 10 or 1 to 3 ethylene oxide units.

[0171] The gel network thickener system preferably comprises at least one cationic surfactant selected from quaternary ammonium salts or amido-amines having at least one fatty chain containing at least about 20 carbon atoms and mixture thereof.

[0172] The quaternary ammonium salts have general formula N+(R1R2R3R4)X_: wherein, R1is selected from linear and branched radicals comprising about 20 to 30 carbon atoms, R2is selected from linear and branched radicals comprising about 20 to 30 carbon atoms or the same group as radicals R3to R4, the radicals R3to R4, which can be identical or different, are selected from linear and branched aliphatic radicals comprising from about 1 to 4 carbon atoms, and aromatic radicals such as aryl and alkylaryl, the aliphatic radicals can comprise at least one hetero atom such as oxygen, nitrogen, sulphur and halogens, the aliphatic radicals are chosen, for example, from alkyl, alkoxy and alkylamide radicals, and wherein X’ is an anion selected from halides, such as chloride, bromide and iodide) (C2-C6)alkyl sulphates, such as methyl sulphate, phosphates, alkyl and alkylaryl sulphonates, and anions derived from organic acids, such as acetate and lactate. The cationic surfactant is, for example, a behentrimonium chloride, behenamidopropyltrimonium methosulfate, stearamidopropyltrimonium chloride, arachidtrimonium chloride and mixtures thereof.

[0173] The amido-amine have general formula R'1-CONH(CH2)nNR'2R'3: wherein, R'1is selected from linear and branched radicals comprising about 20 to 30 carbon atoms, the radicals R'2and R'3, which can be identical or different, are selected from hydrogen, linear and branched aliphatic radicals comprising from about 1 to 4 carbon atoms, and aromatic radicals such as aryl and alkylaryl, the aliphatic radicals can comprise at least one hetero atom such as oxygen, nitrogen, sulphur and halogens, the aliphatic radicals are chosen, for example, from alkyl, alkoxy and alkylamide radicals, and wherein n is integer from 1 to 4. The amido-amine can be selected from, for example, behenamidopropyldimethylamine, behenamidopropyldiethylamine, behenamid- oethyldiethyl-amine, behenamidoethyldimethylamine, arachidamidopropyl- dimethylamine, arachidamido-propyidiethylamine, arachidamido- ethyidiethylamine, arachidamidoethyidimethylamine, and mixtures thereof.

[0174] In one preferred embodiment of the presently claimed invention, the surfactant which is used to form the gel network systems is selected from the group consisting of ceteareth-25, steareth-20, steareth-100, steareth-150, steareth- 200 and mixtures thereof. These surfactants act as a co- emulsifier and stabilizer of the gel network system.

[0175] Those skilled in the art will recognize that gel network thickener systems usually have a complex structure of networked lamellar bi-layers and I or vesicles and sometimes crystals. These systems usually have creamy appearance and feel and are thus particularly desirable.

[0176] In one embodiment of the presently claimed invention, the hair oxidative hair colouring composition may further comprise at least one anionic, cationic, nonionic, amphoteric, or zwitterionic polymer or mixtures thereof; antioxidants; penetrants; sequestrants; fragrances; dispersants; film-forming agents; ceramides; preserving agents; and opacifiers.

[0177] In a preferred embodiment of the presently claimed invention the suitable non- associative cross-linked polycarboxylic polymers for use herein can be selected, for example, from: (i) cross-linked acrylic acid homopolymers; or (ii) copolymers of acrylic or (meth)acrylic acid and of C1-C6 alkyl acrylate or (meth)acrylate. Such polymers are sold under the names Carbopol 980, 981 , 954, 2984, 5984 by the company Noveon or Synthalen M, Synthalen L and Synthalen K by the company 3V Sigma, or Aculyn-33 by the company Rohm and Haas.

[0178] The oxidizing hair colouring composition of the presently claimed invention may be based on the same or similar (i.e. having the same ingredients but possibly at different level) formulation chassis as the tint component. In one embodiment of the presently claimed invention, the oxidative hair colouring composition of the invention is obtained by mixing the tint composition (i) and oxidizing composition (ii).

[0179] The tint composition (i) comprises preferably at the at least one oxidative coupler dye (component (A)), the at least oxidative primary dye precursor (component (B)), the chelant mixture (component (C)), and the at least one alkalizing agent (component (D)).

[0180] The oxidizing composition (ii) comprises the hydrogen peroxide (component (E)).

[0181] Such two component systems are commonly used in the art and each component is formulated so that the resulting mixture is an oxidative hair colouring composition according to the invention.

[0182] Packaging

[0183] In one embodiment of the presently claimed invention, before use, the tint and oxidizing compositions used in the invention are normally packaged separately from one another. The compositions may be packaged in separate primary packages such as plastic bottle, sachet or tube. The components, in particular each component of a two-component composition, may however be packaged separately but within a common secondary package such as a carton or in different compartment of an aerosol or foam bottle, as in known in the trade. A conditioning composition, which can be applied after rinsing of the oxidative hair colouring composition, may also be packaged in such secondary package. On the other hand, the different components of the invention, in particular the third component, may be sold separately from the other components.

[0184] Method of Hair Dying

[0185] Application of the oxidative hair colouring composition to the hair may be undertaken in several ways. Application of the oxidative hair colouring composition may take place on the whole head of hair of an end user. As used herein, the "whole head of hair" means that the hair all over the head from the root of the hair to the tip of the hair is included in the application process. By contrast, the application of the oxidative hair colouring composition may take place only on the root portion of the hair. The application to the root portion of the hair may still be over the entire head of the end user, but application of the oxidative hair colouring composition is applied only to the section of hair closest to the head (root portion), which is between about 0.01 mm to about 40 mm from the scalp of the head. After application to the root portion, product may be applied to the rest of the hair at a later stage to prevent over processing of the hair in the lengths and ends. Also, application may take place on a portion of hair. Application of a portion of hair is commonly referred to as highlighting or lowlighting. The portion of hair may be physically separated from the whole head of hair in a hair bundle or may be a smaller portion of hair than the whole head of hair. A hair bundle may be physically separated from a whole head of hair by a device including a plastic cap through which hair bundles are formed when hair is pulled through orifices in the plastic cap, metal foils encompassing a hair bundle, strand separators applied to hair at the root portion, or similar devices.

[0186] When present, an optional conditioning agent can be provided in an additional container. In the latter case, the conditioner can be mixed immediately before use and applied together with the other components, or the content of the additional container can be applied (after an optional rinse step) as a posttreatment immediately after the oxidative hair colouring composition.

[0187] According to one method for oxidatively colouring hair, the method comprises mixing a tint composition and an oxidizing composition and optionally a third component comprising a second non-ammonia alkalizing agent together to form a oxidative hair colouring composition, applying the oxidative hair colouring composition to the hair to form a treated hair surface, waiting for a period of 5- 50 minutes, such as 20-35 minutes, and then removing the hair colouring composition from the treated hair surface through rinsing with water.

[0188] The methods of colouring hair also may further comprise working the oxidative hair colouring composition into the treated hair surface by hand or by a tool for a few minutes to ensure uniform application to the entire treated hair surface. The oxidative hair colouring composition remains on the treated hair surface while the end hair colour develops for a time period of 5 to 50 minutes to form oxidatively coloured hair. The consumer then rinses his / her oxidatively coloured hair thoroughly with tap water and allows it to dry and / or styles the oxidatively coloured hair. In one embodiment of the presently claimed invention, a method of treating hair with the oxidative hair colouring composition preferably comprises the steps of: a. providing a tint composition (i) as described herein; b. providing an oxidizing composition (ii) as described herein; c. mixing the oxidizing composition (ii) and the tint composition (i) to obtain a mixed oxidative hair colouring composition as described herein; d. applying the mixed oxidative hair colouring composition for the oxidative dyeing of keratin fibres onto the hair; e. leaving the composition on the hair for 5 to 50 minutes; and f. subsequently rinsing the oxidative hair colouring composition from the hair.

[0189] In one embodiment of the presently claimed invention, the oxidative hair colouring composition may be obtained by mixing immediately prior to use a tint composition and the oxidizing composition. A sufficient amount of the mixed oxidative hair colouring composition is applied to the hair, according to the hair abundance, generally from 20 to 250 grams depending on the amount of hair to be coloured. Upon such preparation, the oxidative hair colouring composition is applied to the hair to be dyed and remains in contact with the hair for an amount of time effective to dye the hair. Typically, the oxidative hair colouring composition is allowed to act on the hair from 5 to 50, preferably 10 to 40, preferably 20 to 35 minutes, at a temperature ranging from 15 to 50 °C. Thereafter, the hair is rinsed with water to remove the oxidative hair colouring composition and dried. If necessary, the hair is washed with a shampoo and rinsed, e.g., with water or a weakly acidic solution, such as a citric acid or tartaric acid solution, and dried. Optionally, a separate conditioning product may also be provided.

[0190] The oxidative hair colouring composition can be applied on hair via an applicator bottle or brush. It can be used on full head or partly on single strands (highlight application) as common highlight applicator foils, caps and special applicators can be used, but also freehand techniques such as balayage, with brush and / or combs can be possible. The oxidative hair colouring composition can also be applied as a mousse via a manual spray, a pressurized container or an aerosol mousse. The oxidative hair colouring composition may be dispensed as a solid form to which water is added to generate the oxidant and form a thickened vehicle suitable for hair colouring.

[0191] The invention is associated with one or more of the following advantages:

[0192] • high lift of the hair

[0193] • a wider range of desired colour shades for colouring the hair

[0194] • low levels of damage of the hair per unit of lift

[0195] • a pleasant odour profile while application to the hair

[0196] • reduced levels of dye adducts

[0197] • less off-tone

[0198] In the following, there is provided a list of embodiments to further illustrate the present disclosure without intending to limit the disclosure to the specific embodiments listed below.

[0199] EMBODIMENTS

[0200] 1. An oxidative hair colouring composition comprising as components

[0201] (A) at least one oxidative coupler dye precursor,

[0202] (B) at least one oxidative primary dye precursor,

[0203] (C) a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid, and salts thereof,

[0204] (D) at least one alkalizing agent, and

[0205] (E) at least one oxidizing agent.

[0206] 2. The oxidative hair colouring composition according to embodiment 1 , wherein the oxidative hair colouring composition additionally comprises as component (F) a cosmetically acceptable aqueous or aqueous-organic medium.

[0207] 3. The oxidative hair colouring composition according to embodiment 1 or 2, wherein component (E) is hydrogen peroxide.

[0208] 4. The oxidative hair colouring composition according to embodiments 1 to 3, wherein the component (D) is present in an amount in the range of > 0.1 wt.% to < 10.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0209] 5. The oxidative hair colouring composition according to embodiments 1 to 4, wherein the component (D) is present in an amount in the range of 0 > 0.1 wt.% to < 7.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0210] 6. The oxidative hair colouring composition according to embodiments 1 to 5, wherein the component (E) is present in an amount in the range of > 1.0 wt.% to < 8.0 wt.%, based on the total weight of the oxidative hair colouring composition.

[0211] 7. The oxidative hair colouring composition according to embodiments 1 to 6, wherein the component (D) is at least one alkalizing agent selected form the group consisting of 2-amino-1 -propanol, 2-amino-1 -butanol, 2- dimethylamino-2-pethyl-1 -propanol, 2-amino-2-methylpropan-1 -ol, 3- amino-1 -propanol, ammonia and monoethanolamine.

[0212] 8. The oxidative hair colouring composition according to embodiments 1 to 7, wherein component (A) is at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4-chlororesorcinol, 2- chlororesorcinol, 2-methylresorcinol, m-aminophenol, 4-amino-2- hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 3-amino-2,6- dimethylphenol, 3-amino-2,4-dichlorophenol, 5-amino-6-chloro-o-cresol, 5- amino-4-chloro-o-cresol, hydroxybenzomorpholine, 2-amino-5- ethylphenol, 6-amino-m-cresol, 6-amino-o-cresol, 2,4- diaminophenoxyethanol, 2-amino-4-hydroxyethylaminoanisole, 1 ,3-bis- (2,4-diaminophenoxy)propane, 2,6-dihydroxyethylaminotoluene, m- phenylenediamine, 2,4-diamino-1 ,5-di(2-hydroxyethoxybenzene, 1- naphthol, 2-methyl-1 -naphthol, 1 ,5-naphthalenediol, 2,7-naphthalenediol, 1 -acetoxy-2-methylnaphthalene, 2,6-dihydroxy-3,4-dimethylpyridine, 2,6- dimethoxy-3,5-pyridinediamine, 3-amino-6-methoxy-2-(methylamino)- pyridine, 2-amino-3-hydroxypyridine, 2,6-diaminopyridine, dihydroxyindole, 6-hydroxyindole, dihydroxyindoline, phenyl methyl pyrazolone, 1 ,2,4- trihydroxybenzene, 5-((2-hydroxyethyl)amino)-1 ,3-benzodioxol, isatin, hydroquinone, 4-formyl-1-methylquinolinium-p-toluenesulfonate and salts thereof. The oxidative hair colouring composition according to embodiments 1 to 8, wherein component (B) is at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5-diamine, p- phenylenediamine, n-phenyl-p-phenylenediamine, N,N-bis(2- hydroxyethyl)-p-phenylenediamine, hydroxyethyl-p-phenylenediamine sulphate, hydroxypropyl bis(n-hydroxyethyl-p-phenylenediamine), 2- methoxymethyl-p-phenylenediamine, 2-chloro-p-phenylenediamine, p- aminophenol, p-methylaminophenol, 4-amino-m-cresol, 6-amino-m-cresol, bis(5-amino-2-hydroxyphenyl)methane, tetraaminopyrimidine, 2,5,6- triamino-4-pyrimidinol, 4,5-diamino-1 -(2-hydroxyethyl)pyrazol 2,3- diaminodihydroxypyrazolopyrazolone dimethosulfonate, 4,5-diamino-1 - hexylpyrazol, hydroxypropyl-p-phenylenediamine, dimethylpiperazinium aminopyrazolopyridine chloride hydrochloride, methylimidazoliumpropyl p- phenylenediamine, hydroxyethoxy aminopyrazolopyridine and salts thereof. The oxidative hair colouring composition according to embodiments 1 to 9, wherein the oxidative hair colouring composition has a pH in the range of > 8.5 to < 10.5. The oxidative hair colouring composition according to embodiments 1 to

[0213] 10, wherein component (A) is at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4-chlororesorcinol, 2- chlororesorcinol, 2-methylresorcinol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol, 2-methyl-5- hydroxyethylaminophenol, 5-((2-hydroxyethyl)amino)-1 ,3-benzodioxol and salts thereof. The oxidative hair colouring composition according to embodiments 1 to

[0214] 11 , wherein component (B) is at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5-diamine, hydroxypropyl- p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine and salts thereof. The oxidative hair colouring composition according to embodiments 1 to

[0215] 12, wherein component (D) is a mixture of 2-amino-1 -propanol and monoethanolamine. 14. The oxidative hair colouring composition according to embodiments 1 to

[0216] 13, wherein component (C) is present in an amount in the range from > 0.20 wt.% to < 1.5 wt.%, based on the total weight of the oxidative hair colouring composition.

[0217] 15. The oxidative hair colouring composition according to embodiments 1 to

[0218] 14, wherein component (C) comprises a mixture of

[0219] 0.1 to 1.3 wt.% of DTPMP,

[0220] 0.1 to 1.29 wt.% of EDDS, and

[0221] 0.0 to 0.2 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0222] 16. The oxidative hair colouring composition according to embodiments 1 to

[0223] 15, wherein component (C) comprises a mixture of

[0224] 0.3 to 0.7 wt.% of DTPMP,

[0225] 0.1 to 0.15 wt.% of EDDS, and

[0226] 0.0 to 0.15 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

[0227] 17. The oxidative hair colouring composition according to embodiments 1 to

[0228] 16, wherein component (D) is monoethanolamine.

[0229] 18. The oxidative hair colouring composition according to embodiments 1 to

[0230] 17, wherein the weight ratio of DTPMP to EDDS in the oxidative hair colouring composition is higher than 1.

[0231] 19. A kit comprising

[0232] (i) a tint composition comprising components (A), (B), (C) and (D) as defined in any one of the preceding embodiments, and

[0233] (i) an oxidative composition comprising component (E) as defined any in any one of the preceding embodiments.

[0234] 20. A method of treating hair comprising the steps of: a. providing the tint composition (i) comprising components (A), (B), (C) and (D) as defines in any one of the preceding embodiments, b. providing an oxidative composition (ii) comprising component (E) as defined in any one of the preceding embodiments, c. mixing the tint composition (i) and the oxidative composition (ii) to obtain a mixed oxidative hair colouring composition according to any one of the preceding embodiments, d. applying the oxidative hair colouring composition onto the hair; e. leaving the oxidative hair colouring composition on the hair for a period in the range from > 5 to < 50 minutes; and f. subsequently rinsing the oxidative hair colouring composition from the hair.

[0235] EXAMPLES

[0236] The following examples illustrate the formulations and performance results according to the presently claimed invention. These examples are not intended to be inclusive of all aspects of the subject matter disclosed herein, but rather to illustrate representative compositions and results. These examples are not intended to exclude equivalents and variations of the presently claimed invention, which are apparent to one skilled in the art.

[0237] Method of Measurements

[0238] 1. Hair Damage Measurement via FTIR

[0239] Damage caused to the hair was assessed by a FTIR (Fourier Transform Infrared) method, which was established to be suitable for studying the effects of keratin surface damage. Strassburger, J., J. Soc. Cosmet Chem., 36, 61 -74 (1985); Joy, M. & Lewis, D.M., Int. J. Cosmet. Sci., 13, 249-261 (1991 ); Signori, V. and Lewis, D.M., Int. J. Cosmet. Sci., 19, 1-13 (1997)). In particular, these authors have shown that the method was suitable for quantifying the amount of cysteic acid. In general, the oxidation of cystine is thought to be a suitable marker by which to monitor the overall oxidation of the keratinous part of the fiber. Net, the measurement of cysteic acid units by FT-IR was commonly used.

[0240] Signori and Lewis (D.M., Int. J. Cosmet. Sci., 19, 1-13 (1997)) showed that FTIR using a diamond Attenuated Total Internal Reflection (ATR) cell was a sensitive and reproducible way of measuring the cysteic acid content of single fibers and bundles. Hence, the method that was employed to measure the cysteic acid content of multiple fibre bundles and full hair switches, was based upon the FTIR diamond cell ATR method employed by Signori and Lewis (1997). The detailed description of the method for testing the different damage inhibitors follows thereafter:

[0241] A Perkin Elmer Spectrum® 1 Fourier Transform Infrared (FTIR) composition equipped with a diamond Attenuated Total Internal Reflection (ATR) cell was used to measure the cysteic acid concentration in mammalian or synthetic hair. In this method, hair switches of various sizes and colours were used. The switches were platted (~1 plait per cm) in order to minimize variations in surface area of contact between readings. The Oxidative hair Treatment Protocol described above was repeated for 5 cycles to mimic the behaviour of hair after repeated bleaching cycles. Following this treatment, four readings per switch were taken (1 / 3 and 2 / 3s down the switch on both sides), and an average calculated. Backgrounds were collected every 4 readings, and an ATR cell pressure of 1 N / m was employed. The cell was cleaned with ethanol between each reading, and a contamination check was performed using the monitor ratio mode of the instrument. As prescribed by Signori & Lewis in 1997, a normalized double derivative analysis routine was used. The original spectra was initially converted to absorbance, before being normalized to the 1450 cm’1band (the characteristic and invariant protein CH2stretch). This normalized absorbance was then twice derivatised using a 13-point averaging. The value of the 1450 cm’1normalized 2nd derivative of the absorbance at 1040 cm’1was taken as the relative concentration of cysteic acid. This figure was multiplied by -1x104to recast it into suitable units.

[0242] 2. Colour Measurement via Spectrophotometer

[0243] A Minolta spectrophotometer CM-2600d was used to measure the colour of the cured and dried hair tresses, five points on both the front and back sides, and the average D65 L*a*b values reported.

[0244] Examples: q.s. = quantum satis not within the scope of the invention q.s. = quantum satis * not within the scope of the invention

[0245] Oxidative Composition (Developer 9%) q.s. = quantum satis

[0246] The formulations were prepared according to the following methods.

[0247] Creme pre-mix formula was a part of either the tint formulation or the oxidizing formulation. A creme pre-mix is created by combining together DI water (68.5%), cetearyl alcohol (25%) and Steareth-20 (6.5%). The mixture was heated to 80-85 °C to melt the waxes and surfactant with stirring. The composition was homogenized for 5 minutes and then cooling was started to reduce the product to room temperature. The resulting creme pre-mix was thick and used in the batches 1 A-1 D and also within the oxidizing composition 1 E.

[0248] Tint compositions:

[0249] The remaining components of the tint formula for each product were mixed together at room temperate with DI water. When all of the materials were dissolved, 40 wt.% of the creme pre-mix was added, and the mixture stirred until a uniform consistency was obtained. The products were then stored in aluminium tubes until used.

[0250] Oxidizing compositions:

[0251] The remaining components were mixed together with the DI water at room temperature. When all of the materials were dissolved, 20 wt.% of the creme pre-mix was added, and the mixture stirred until a uniform consistency was obtained. The products were then stored in plastic bottles until used.

[0252] In the examples of the presently claimed invention either 6% or 9% oxidizing formula (Developer from the Wella Company) was used.

[0253] Lift vs. Hair Damage Performance Testing Method

[0254] The tint compositions (1-7) are also used within testing to determine the hair lifting or bleaching performance, and the amount of damage the colouring compositions created on the hair. The following protocol was used to assess the performance of each colouring composition.

[0255] 1. Two level 7 hair tresses (Kerling details) were used to test each colouring composition.

[0256] 2. One part of each tint composition (1-7) was mixed with 1.5 parts of oxidising composition (Welloxon Perfect 9%) and then applied and worked throughout the hair tresses with a brush. 4 g of product was applied to each 1g tress.

[0257] 3. The tresses were placed into a 30 °C oven for 30 minutes for the bleaching process to occur.

[0258] 4. The tresses were then removed from the oven and rinsed in water, 4 L min-1 at a temperature of 37 +- 2 °C for 30 seconds; then washed with Wella Briliance shampoo for 30 seconds; then rinsed again for 30 seconds; then treated with Wella Brilliance Conditioner for 30 seconds; then rinsed again for 30 seconds.

[0259] 5. The tresses were then dried with a hair drier.

[0260] 6. Steps 4 and 5 were repeated another 5 times.

[0261] This procedure was repeated 5 times and the resulting hair tresses were then measured for lift via L*a*b value and damage ATR FT-IR using the methods described above. The lift and hair damage results are captured in the table below. ) A refers to the difference between the measurement of a treated versus an untreated tress. ) Tukey-Kramer HSD Comparison of all pairs with alpha = 0.05. Letters not connected by the same letter are significantly different.

Claims

Claims1 . An oxidative hair colouring composition comprising as components(A) at least one oxidative coupler dye precursor,(B) at least one oxidative primary dye precursor,(C) a chelant mixture comprising diethylenetriamine penta(methylene phosphonic acid) and ethylenediamine-N,N'-disuccinic acid, and salts thereof,(D) at least one alkalizing agent, and(E) at least one oxidizing agent.

2. The oxidative hair colouring composition according to claim 1 , wherein the oxidative hair colouring composition additionally comprises as component(F) a cosmetically acceptable aqueous or aqueous-organic medium.

3. The oxidative hair colouring composition according to claim 1 or 2, wherein component (E) is hydrogen peroxide.

4. The oxidative hair colouring composition according to any of claims 1 to 3, wherein the component (D) is present in an amount in the range of > 0.1 wt.% to < 10.0 wt.%, based on the total weight of the oxidative hair colouring composition.

5. The oxidative hair colouring composition according to any of claims 1 to 4, wherein the component (D) is present in an amount in the range of 0 > 0.1 wt.% to < 7.0 wt.%, based on the total weight of the oxidative hair colouring composition.

6. The oxidative hair colouring composition according to any of claims 1 to 5, wherein the component (E) is present in an amount in the range of > 1.0 wt.% to < 8.0 wt.%, based on the total weight of the oxidative hair colouring composition.

7. The oxidative hair colouring composition according to any of claims 1 to 6, wherein the component (D) is at least one alkalizing agent selected form the group consisting of 2-amino-1 -propanol, 2-amino-1 -butanol, 2-dimethylamino-2-pethyl-1 -propanol, 2-amino-2-methylpropan-1 -ol, 3- amino-1 -propanol, ammonia and monoethanolamine.

8. The oxidative hair colouring composition according to any of claims 1 to 7, wherein component (A) is at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4-chlororesorcinol, 2- chlororesorcinol, 2-methylresorcinol, m-aminophenol, 4-amino-2- hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 3-amino-2,6- dimethylphenol, 3-amino-2,4-dichlorophenol, 5-amino-6-chloro-o-cresol, 5- amino-4-chloro-o-cresol, hydroxybenzomorpholine, 2-amino-5-ethylphenol, 6-amino-m-cresol, 6-amino-o-cresol, 2,4-diaminophenoxyethanol, 2-amino- 4-hydroxyethylaminoanisole, 1 ,3-bis-(2,4-diaminophenoxy)propane, 2,6- dihydroxyethylaminotoluene, m-phenylenediamine, 2,4-diamino-1 ,5-di(2- hydroxyethoxybenzene, 1 -naphthol, 2-methyl-1 -naphthol, 1 ,5- naphthalenediol, 2,7-naphthalenediol, 1-acetoxy-2-methylnaphthalene, 2,6- dihydroxy-3,4-dimethylpyridine, 2,6-dimethoxy-3,5-pyridinediamine, 3- amino-6-methoxy-2-(methylamino)-pyridine, 2-amino-3-hydroxypyridine, 2,6-diaminopyridine, dihydroxyindole, 6-hydroxyindole, dihydroxyindoline, phenyl methyl pyrazolone, 1 ,2,4-trihydroxybenzene, 5-((2- hydroxyethyl)amino)-1 ,3-benzodioxol, isatin, hydroquinone, 4-formyl-1 - methylquinolinium-p-toluenesulfonate and salts thereof.

9. The oxidative hair colouring composition according to any of claims 1 to 8, wherein component (B) is at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5-diamine, p- phenylenediamine, n-phenyl-p-phenylenediamine, N,N-bis(2- hydroxyethyl)-p-phenylenediamine, hydroxyethyl-p-phenylenediamine sulphate, hydroxypropyl bis(n-hydroxyethyl-p-phenylenediamine), 2- methoxymethyl-p-phenylenediamine, 2-chloro-p-phenylenediamine, p- aminophenol, p-methylaminophenol, 4-amino-m-cresol, 6-amino-m-cresol, bis(5-amino-2-hydroxyphenyl)methane, tetraaminopyrimidine, 2,5,6- triamino-4-pyrimidinol, 4,5-diamino-1 -(2-hydroxyethyl)pyrazol 2,3- diaminodihydroxypyrazolopyrazolone dimethosulfonate, 4,5-diamino-1 - hexylpyrazol, hydroxypropyl-p-phenylenediamine, dimethylpiperazinium aminopyrazolopyridine chloride hydrochloride, methylimidazoliumpropyl p- phenylenediamine, hydroxyethoxy aminopyrazolopyridine and salts thereof.

10. The oxidative hair colouring composition according to any of claims 1 to 9, wherein the oxidative hair colouring composition has a pH in the range of > 8.5 to < 10.5.11 . The oxidative hair colouring composition according to any of claims 1 to 10, wherein component (A) is at least one oxidative coupler dye precursor selected from the group consisting of resorcinol, 4-chlororesorcinol, 2- chlororesorcinol, 2-methylresorcinol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol, 2-methyl-5- hydroxyethylaminophenol, 5-((2-hydroxyethyl)amino)-1 ,3-benzodioxol and salts thereof.

12. The oxidative hair colouring composition according to any of claims 1 to 11 , wherein component (B) is at least one oxidative primary dye precursor selected from the group consisting of toluene-2,5-diamine, hydroxypropyl- p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine and salts thereof.

13. The oxidative hair colouring composition according to any of claims 1 to 12, wherein component (D) is a mixture of 2-amino-1 -propanol and monoethanolamine.

14. The oxidative hair colouring composition according to any of claims 1 to 13, wherein component (C) is present in an amount in the range from > 0.20 wt.% to < 1.5 wt.%, based on the total weight of the oxidative hair colouring composition.

15. The oxidative hair colouring composition according to any of claims 1 to 14, wherein component (C) comprises a mixture of0.1 to 1.3 wt.% of DTPMP,0.1 to 1.29 wt.% of EDDS, and0.0 to 0.2 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

16. The oxidative hair colouring composition according to any of claims 1 to 15, wherein component (C) comprises a mixture of0.3 to 0.7 wt.% of DTPMP,0.1 to 0.15 wt.% of EDDS, and0.0 to 0.15 wt.% of EDTA, wherein the wt.% values are based on the total weight of the oxidative hair colouring composition.

17. The oxidative hair colouring composition according to any of claims 1 to 16, wherein component (D) is monoethanolamine.

18. The oxidative hair colouring composition according to any of claims 1 to 17, wherein the weight ratio of DTPMP to EDDS in the oxidative hair colouring composition is higher than 1.

19. A kit comprising(i) a tint composition comprising components (A), (B), (C) and (D) as defined in any one of the preceding claims, and(i) an oxidative composition comprising component (E) as defined any in any one of the preceding claims.

20. A method of treating hair comprising the steps of: a. providing the tint composition (i) comprising components (A), (B), (C) and (D) as defines in any one of the preceding claims, b. providing an oxidative composition (ii) comprising component (E) as defined in any one of the preceding claims, c. mixing the tint composition (i) and the oxidative composition (ii) to obtain a mixed oxidative hair colouring composition according to any one of the preceding claims, d. applying the oxidative hair colouring composition onto the hair; e. leaving the oxidative hair colouring composition on the hair for a period in the range from > 5 to < 50 minutes; and f. subsequently rinsing the oxidative hair colouring composition from the hair.

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