Hair care composition resulting in improved color resistance of dyed hair

Abstract

The present invention relates to a hair care composition comprising a specific mixture of branched and linear saturated C15-C19 alkanes, an ester of dextrin and a fatty acid, and a cationic emulsifier. It has been shown that these hair care compositions result in a significant increase in color resistance of dyed hair.

Description

Technical Field

[0001] The present invention relates to the field of cosmetic compositions, in particular to the field of cosmetic compositions for caring for dyed hair. Background Art

[0002] Hair coloring is a specific area of ​​cosmetics. Hair coloring is a common procedure (especially for women) and is performed through the use of hair dyes.

[0003] According to colour resistance, hair dyes are divided into temporary, semipermanent, demipermanent and permanent. The first two are based on molecules that have already been coloured. Temporary hair dyes work by depositing the dye on the cuticle, but semipermanent hair dyes can penetrate a little into the cortex, so the colour usually resists up to six washes. Demipermanent and permanent hair dyes are based on colour precursors called oxidative hair dyes, which form the final colour shade through their interaction with an oxidising agent, but they differ in the alkalising agent used. In oxidative systems, the molecules diffuse strongly into the cortex, which promotes longer colour resistance.

[0004] Washing your hair, especially with shampoo, can cause the color to fade. Semi-permanent hair dyes are usually washed out after 4-6 shampoos. Although permanent hair dyes last significantly longer to water and shampoo due to chemical fixation, the color fastness of permanent hair dyes is not perfect.

[0005] In the market for hair care products used in the field of hair coloring, there is a strong desire to improve the color fastness of hair dyes, since consumers desire a constant hair color and appearance over an extended period of time. Summary of the invention

[0006] The problem underlying the present invention is therefore to provide a product which improves the color fastness of dyed hair.

[0007] Surprisingly, it has been found that this problem can be solved by a hair care composition according to claim 1 .

[0008] It has been observed that when dyed hair is treated with a hair composition comprising a specific mixture of branched and linear saturated C15-C19 alkanes, dextrins and esters of fatty acids and a cationic emulsifier, the color of the dyed hair resists the negative wash-out effects of shampoo and water for longer.

[0009] Further aspects of the invention are the subject matter of further independent claims. Particularly preferred embodiments are the subject matter of the dependent claims. DETAILED DESCRIPTION

[0010] In a first aspect, the present invention relates to a hair care composition comprising

[0011] - a mixture of branched and linear saturated C15-C19 alkanes; and

[0012] - esters of dextrin and fatty acids; and

[0013] -Cationic emulsifier

[0014] Wherein the amount of branched saturated C15-C19 alkanes in the mixture of branched and linear saturated C15-C19 alkanes is greater than 80 wt%, preferably greater than 90 wt%, most preferably greater than 92 wt%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0015] In this document, “C x-y An "-alkyl" group is an alkyl group containing from x to y carbon atoms, i.e., for example, C 1-3 -Alkyl is an alkyl group containing 1 to 3 carbon atoms. The alkyl group can be straight chain or branched. For example, -CH(CH 3 )-CH 2 -CH 3 Considered to be C 4 -alkyl.

[0016] In case a symbol or a radical of the same label is present in several formulae, in this document the definition given to said radical or symbol in the context of one specific formula also applies to the other formulae containing the same said label.

[0017] The term "UV filter" in this context stands for substances which absorb ultraviolet light (=UV light), i.e. electromagnetic radiation with a wavelength between 280 and 400 nm. UV(A) filters are UV filters which absorb UV(A) light, i.e. electromagnetic radiation with a wavelength between 315 and 400 nm. UV(B) filters are UV filters which absorb UV(B) light, i.e. electromagnetic radiation with a wavelength between 280 and 315 nm.

[0018] Liquid organic UV filters are liquid at ambient temperature (ie 25°C).

[0019] Solid organic UV filters are solid at ambient temperature (ie 25°C).

[0020] By "a mixture of branched and linear saturated C15-C19 alkanes" herein is meant that the mixture comprises different alkanes, each of which has only 15, 16, 17, 18 or 19 carbon atoms, but the mixture does not comprise any alkanes with fewer carbons. Thus, such a mixture does not comprise, for example, dodecane or isododecane. The mixture comprises both branched C15-C19 alkanes and linear C15-C19 alkanes.

[0021] The term "shampoo" as used herein relates to a hair care composition for cleansing the hair, i.e. removing oil, dirt, skin particles, dandruff, environmental pollutants and other pollutant particles which accumulate in the hair. The term shampoo also includes conditioning shampoos. Shampoo formulations according to the invention are applied to the hair and then rinsed off with water and are well known to those skilled in the art.

[0022] The term "hair conditioner" refers herein to a hair care composition that is applied after washing the hair with a cleansing composition (e.g., shampoo). Conditioners make the hair softer and more pliable, facilitate combing, and impart other positive attributes to the hair. Such hair conditioners may be leave-in products or rinse-off products, and are well known to those skilled in the art.

[0023] In this article, white is not considered a "color".

[0024] The term "color fastness" refers to the resistance of dyed hair to being washed off by water, by a cleaning product (typically shampoo), respectively. Thus, an increase in color fastness means that the removal of the dye from the dyed hair by washing / shampooing is reduced.

[0025] A mixture of branched and straight chain saturated C15-C19 alkanes

[0026] The hair care composition comprises a mixture of branched and linear saturated C15-C19 alkanes.

[0027] Particularly suitable mixtures of C15-C19 alkanes are in particular those disclosed in WO 2016 / 185046, WO 2017 / 046177, WO 2018 / 109353A1 and WO 2018 / 109354A1 and WO 2018 / 172228A1.

[0028] Preferably, the mixture of branched and linear saturated C15-C19 alkanes has a content of carbon of bio-origin greater than or equal to 90% relative to the total weight of the mixture of branched and linear saturated C15-C19 alkanes. The bio-origin of chemicals is very advantageous, since such materials are highly sustainable. Highly sustainable products or compositions are in great demand on the market.

[0029] The determination of the biobased material content or biogenic carbon content is given according to the standards ASTM D 6866-12, Method B (ASTM D 6866-06) and ASTM D 7026 (ASTM D7026-04). The standard ASTM D 6866 is concerned with "Determination of the biobased content of natural range materials using radiocarbon and isotope ratio mass spectrometry", while the standard ASTM D 7026 is concerned with "Sampling and reporting of results for the determination of the biobased content of materials by carbon isotope analysis". The second standard refers to the first standard in its first paragraph. The first standard describes the ratio 14 C / 12 The C of the test sample is measured and compared to that of a 100% reproducible source reference 14 C / 12 The C ratio is compared to give the relative percentage of C from renewable sources in the sample. 14 Same concept as C dating.

[0030] It is further preferred that the composition has no or very small amounts (less than 100 ppm, in particular less than 30 ppm) of aromatic hydrocarbons relative to the total weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0031] The mixture of branched and linear saturated C15-C19 alkanes is produced in particular by catalytic hydrogenation of hydrocarbon biomass feedstocks, as described in detail in WO 2016 / 185046, in particular as disclosed as Example 3 of WO 2016 / 185046.

[0032] Preferably, the amount of linear saturated C15-C19 alkanes in the mixture of branched and linear saturated C15-C19 alkanes is less than 10 wt.-%, preferably less than 8 wt.-%, most preferably greater than 5 wt.-%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0033] It is further preferred that the amount of C15 is less than 3 wt%, in particular less than 1 wt%, preferably less than 0.05 wt%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0034] Preferably, the mixture of branched and straight chain saturated C15-C19 alkanes is a mixture of branched and straight chain saturated C16-C19 alkanes.

[0035] It is further preferred that the amount of branched saturated C16-C18 alkanes is greater than 90% by weight, preferably greater than 95% by weight, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0036] It is further preferred that the amount of C15 alkanes is less than 5% by weight, in particular less than 2% by weight, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0037] It is further preferred that the amount of branched saturated C17-C18 alkanes is greater than 85% by weight, preferably greater than 92% by weight, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0038] It is further preferred that the amount of C17 alkanes is between 15 and 20 wt. % relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0039] It is further preferred that the amount of branched saturated C18 alkanes is greater than 50 wt%, preferably greater than 60 wt%, even more preferably greater than 70 wt%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0040] It is further preferred that the amount of C18 alkanes is in particular between 70% and 75% by weight relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

[0041] In other words, the mixture of branched and linear saturated C15-C19 alkanes preferably consists primarily of C18 alkanes, and most preferably consists primarily of branched C18 alkanes.

[0042] Since the hair care composition comprises a mixture of branched and linear saturated C15-C19 alkanes, the composition does not comprise any lower alkanes, ie it especially does not comprise any C12 alkanes, and especially does not comprise any C12 or C13 or C14 alkanes.

[0043] It is further preferred that the mixture of C15-C19 alkanes has a viscosity at 20°C of 3-15 mPa·s, in particular 6 to 12 mPa·s.

[0044] It is further preferred that the refractive index of the mixture of C15-C19 alkanes at 20°C is from 1.40 to 1.48, particularly from 1.42 to 1.45, most preferably from 1.43 to 1.44.

[0045] It is further preferred that the mixture of C15-C19 alkanes is prepared from SEPPIC as EMOGREEN TM L19 is a mixture of commercial C15-C19 alkanes.

[0046] The amount of the mixture of branched and linear saturated C15-C19 alkanes is in the range of 0.015 wt.-% to 12.0 wt.-%, in particular 0.5 wt.-% to 11.0 wt.-%, preferably 1.0 wt.-% to 10.0 wt.-%, more preferably 1.5 wt.-% to 8.0 wt.-%, even more preferably 2.0 wt.-% to 6.0 wt.-%, based on the weight of the hair care composition.

[0047] Esters of dextrin and fatty acids

[0048] The hair care composition also comprises dextrin and esters of fatty acids.

[0049] Dextrin is an oligomer of D-glucose. Its structure can be simplified as follows

[0050]

[0051] Dextrins have different average degrees of sugar polymerization, which results in different molecular weights.

[0052] In the present invention, the average saccharide polymerization degree of the dextrin of the ester of dextrin and fatty acid is preferably 3 to 20, particularly 8 to 16.

[0053] Preferably, the fatty acid of the ester of dextrin and fatty acid is a C14-C18 fatty acid, especially a straight chain C14-C18 fatty acid, most preferably palmitic acid.

[0054] Particularly suitable esters of dextrin and fatty acids are available from Chiba Flour Milling as KL2 commercialized dextrin palmitate.

[0055] Dextrin has several hydroxyl groups that can be esterified.

[0056] Preferably, the esters of dextrin and fatty acid have an average number of esterified hydroxyl groups per glucose unit greater than 2.5, preferably from 2.5 to 3.5, more preferably from 2.5 to 3.4, most preferably from 2.5 to 3.2.

[0057] In other words, preferably, a majority of all hydroxyl groups of the dextrin are esterified.

[0058] It is further preferred that the molecular weight Mn of the ester of dextrin and fatty acid is 8000-16000 Da, preferably 9000-13000 Da, more preferably 10000-11500 Da.

[0059] The molecular weight Mn is determined in Daltons (Da), in particular by SEC / GPC using polystyrene as standards.

[0060] Both fatty acids and dextrins have biological origin. Bio-origin of chemicals is very advantageous because such materials or their products are highly sustainable. Highly sustainable products or compositions are in high demand in the market.

[0061] The amount of dextrin and ester of fatty acid is preferably in the range of 0.01 to 15 wt. %, especially 0.1 to 12 wt. %, preferably 0.2 to 8 wt. %, more preferably 0.6 to 7 wt. %, even more preferably 0.8 to 6 wt. %, most preferably 1.3 to 4 wt. %, based on the weight of the hair care composition.

[0062] In the hair care composition, the ratio of the weight of the esters of dextrin and fatty acids to the weight of the mixture of branched and linear saturated C15-C19 alkanes is preferably less than 1, preferably in the range of 0.5 to 0.8, most preferably in the range of 0.55 to 0.70.

[0063] In other words, the composition preferably comprises more C15-C19 alkanes than dextrins and esters of fatty acids by weight.

[0064] Cationic emulsifier

[0065] The hair care compositions of the present invention also comprise a cationic emulsifier.

[0066] The cationic emulsifier is preferably an organic ammonium compound, especially a quaternary ammonium compound.

[0067] The ammonium compound preferably has at least an ammonium group of the following structure:

[0068] or

[0069] Where R 1 , R 2 and R 3 Each independently represents H or a linear or branched C 1-6 -alkyl;

[0070] And where R 4 Indicates straight or branched chain C 1-6 -alkyl;

[0071] And where R 5 represents a linear or branched, saturated or ethylenically unsaturated C 1-25 -alkyl;

[0072] And wherein the dotted line represents the bond of the ammonium group to the rest of the ammonium compound (ie, the cationic emulsifier).

[0073] Furthermore, it is preferred that the molecular weight of the organic ammonium compound is at least 350 Daltons (g / mol), preferably 350-1000 Daltons (g / mol).

[0074] Cationic emulsifiers are preferably quaternary ammonium compounds.

[0075] Preferably, the cationic emulsifier is a substance defined by a CAS number selected from the group consisting of [17301-53-0], [92201-88-2], [1156505-34-8] and [51277-96-4].

[0076] As cationic emulsifiers, particularly preferred are Behentrimonium Chloride, Quaternium-87, Brassicyl Isoleucinate Esylate, Palmitamidopropyl Trimonium Chloride as defined by their INCI names.

[0077] The hair care composition comprises a cationic emulsifier, preferably in an amount ranging from 0.5 to 10 wt. %, in particular 0.5 to 8 wt. %, preferably 1 to 6 wt. %, based on the weight of the hair care composition.

[0078] The hair care compositions are applied to hair, particularly human hair.

[0079] In one embodiment, the hair care composition is a product for cleaning hair. In particular, the cleansing hair care composition is a shampoo.

[0080] Thus, in this embodiment, the product comprises a cleaning agent, which is typically a surfactant, preferably an anionic or nonionic surfactant or an amphoteric or zwitterionic surfactant.

[0081] Exemplary anionic surfactants include alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, alkyl aryl sulfonates, alkyl succinates, alkyl sulfosuccinates, N-alkyl sarcosinates, acyl taurates, acyl isethionates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates, α-olefin sulfonates, especially alkali metal salts and alkaline earth metal salts (e.g., sodium, potassium, magnesium, calcium salts) and ammonium and triethanolamine salts. The alkyl ether sulfates, alkyl ether phosphates and alkyl ether carboxylates may contain 1 to 10 ethylene oxide or propylene oxide units per molecule, preferably 1 to 3 ethylene oxide units. Suitable anionic surfactants are, for example, sodium lauryl sulfate, ammonium lauryl sulfate, sodium lauryl ether sulfate (also known as sodium lauryl polyether sulfate), ammonium lauryl ether sulfate (also known as ammonium lauryl polyether sulfate), sodium lauroylsarkonisate, sodium oleyl succinate, ammonium lauryl sulfosuccinate, sodium dodecylbenzol sulfonate, triethanolamine dodecylbenzenesulfonate. Particularly preferred anionic surfactants for use in shampoos according to the invention are sodium lauryl sulfate, ammonium lauryl sulfate, sodium lauryl ether sulfate and ammonium lauryl ether sulfate and mixtures thereof.

[0082] The amount of the anionic surfactant contained (as an active ingredient) is typically in the range of 0.1 to 50% by weight, more preferably in the range of 5 to 20% by weight, based on the total weight of the shampoo.

[0083] Exemplary nonionic surfactants that can be included in shampoos according to the present invention include condensation products of aliphatic (C8-C18) primary or secondary straight or branched alcohols with alkylene oxides (typically ethylene oxide), the alkylene oxide typically having 6 to 30 ethylene oxide groups. Other representative nonionic surfactants include mono-alkyl or di-alkyl alkanolamides, such as coconut monoethanolamide or coconut diethanolamide and coconut monoisopropanolamide. Other nonionic surfactants that can be included in shampoo formulations of the present invention are alkyl polyglycosides (APGs). Typically, APGs are APGs containing alkyl groups connected (optionally via bridging groups) to blocks of one or more sugar groups, such as Oramix NS10 ex Seppic; Plantacare 818UP, Plantacare 1200 and Plantacare 2000 ex Cognis.

[0084] The amount of nonionic surfactant contained (as an active ingredient) is typically in the range of 0.5-8 wt%, more preferably in the range of 2-5 wt%, based on the total weight of the shampoo.

[0085] Exemplary amphoteric or zwitterionic surfactants include alkylamine oxides, alkyl betaines, alkylamidopropyl betaines, alkyl sulfobetaines (sulfobetaines), alkyl glycinates, alkyl carboxyglycinates, alkyl amphoacetates, alkyl amphopropionates, alkyl amphoglycolates, alkylamidopropyl hydroxysulfobetaines, acyl taurates and acyl glutamates, wherein the alkyl and acyl groups have 8 to 19 carbon atoms. Typical amphoteric and zwitterionic surfactants for use in the shampoo include laurylamine oxide, cocodimethyl sulfopropyl betaine, lauryl betaine, cocamidopropyl betaine (CAPB), sodium cocoamphoacetate and disodium cocoamphodiacetate. Particularly preferred amphoteric or zwitterionic surfactants for use in shampoos are cocamidopropyl betaine and disodium cocoamphodiacetate and mixtures thereof.

[0086] The amount of amphoteric or zwitterionic surfactant included (as active ingredient) is typically in the range of 0.5-8 wt%, more preferably in the range of 1-4 wt%, based on the total weight of the shampoo.

[0087] In another more preferred embodiment, the hair care composition is a hair conditioner.

[0088] Hair care compositions, in particular hair conditioners, are preferably emulsions, microemulsions, oleogels, aqueous dispersions or lipid dispersions.

[0089] The hair care cosmetic composition can be in the form of a suspension or dispersion in a solvent or a fatty substance, or alternatively in the form of an emulsion or microemulsion, in particular of the oil-in-water (O / W-) or water-in-oil (W / O-) type, silicone-in-water (Si / W-) or water-in-silicone (W / Si-) type, a PIT emulsion, a multiple emulsion (for example of the oil-in-water-in-oil (O / W / O-) or water-in-oil-in-water (W / O / W-) type), a Pickering emulsion, a hydrogel, an alcohol gel, a lipogel, a single-phase or multiphase solution or a vesicular dispersion.

[0090] In all embodiments of the present invention, preferred hair care compositions comprise water. The amount of water is preferably from 55% to 99% by weight, in particular from 80% to 95% by weight, based on the weight of the hair care composition.

[0091] Preferred hair care compositions comprise water and are in the form of an emulsion.

[0092] The emulsion contains, in particular, an oil phase and an aqueous phase, such as, in particular, an O / W, W / O, Si / W, W / Si, O / W / O, W / O / W multiple emulsion or a Pickering emulsion.

[0093] The total amount of oil phase present in such emulsions is preferably at least 4 wt.-%, for example in the range of 4 to 30 wt.-%, preferably in the range of 6 to 24 wt.-%, most preferably in the range of 8 to 18 wt.-%, based on the total weight of the hair care composition.

[0094] The amount of aqueous phase present in such emulsions is preferably at least 50 wt.-%, for example in the range of 50 to 98 wt.-%, preferably in the range of 60 to 95 wt.-%, most preferably in the range of 70 to 92 wt.-%, based on the total weight of the hair care composition.

[0095] More preferably, the cosmetic composition is in the form of an oil-in-water (O / W) emulsion comprising an oil phase dispersed in an aqueous phase in the presence of an O / W or Si / W emulsifier. The preparation of such O / W emulsions is well known to those skilled in the art.

[0096] The composition in the form of an O / W emulsion may be provided, for example, in the form of all preparations for O / W emulsions, for example, in the form of a serum, milk or ointment (or cream), and they are prepared according to a general method.

[0097] The hair care composition preferably comprises a UV filter.The UV filter may be solid or liquid.

[0098] Suitable liquid organic UV filters absorb light in the UV(B) and / or UV(A) range and are liquid at ambient temperature (i.e. 25° C.). Such liquid UV filters are well known to those skilled in the art and include in particular cinnamic acid esters, for example octyl methoxycinnamate ( MCX) and isoamyl methoxycinnamate (Neo E 1000); salicylates, such as homosalate (3,3,5-trimethylcyclohexyl 2-hydroxybenzoate, HMS) and ethylhexyl salicylate (also known as ethylhexyl salicylate, 2-ethylhexyl-2-hydroxybenzoate, EHS); acrylates, such as octocrylene (2-ethylhexyl-2-cyano-3,3-diphenylacrylate, 340) and ethyl 2-cyano-3,3-diphenylacrylate; esters of benzalmalonic acid, such as, in particular, dialkyl benzalmalonic acid esters, such as di(2-ethylhexyl) 4-methoxybenzalmalonic acid esters and polysiloxane 15( SLX); dialkyl esters of naphthalene dicarboxylic acid, such as diethylhexyl 2,6-naphthalene dicarboxylate ( TQ); syringylidene malonates, such as diethylhexyl syringylidene malonate ( ST liquid) and benzotriazolyl dodecyl p-cresol ( TL) as well as benzophenone-3 and drometrizole trisiloxane.

[0099] Particularly advantageous liquid organic UV filters are octyl methoxycinnamate, homosalate, ethylhexyl salicylate, octocrylene, diethylhexyl 2,6-naphthalene dicarboxylate, diethylhexyl syringylidenemalonate, benzotriazolyl dodecyl p-cresol, benzophenone-3, drometrizole trisiloxane and mixtures thereof.

[0100] In a preferred embodiment, the liquid UV filter is a liquid UV (B) filter selected from the group consisting of ethylhexyl methoxycinnamate, octocrylene, homosalate, ethylhexyl salicylate, benzophenone-3 and drometrizole trisiloxane.

[0101] Suitable solid organic UV filters absorb light in the UV (B) and / or UV (A) range and are solid at ambient temperature, i.e. 25° C. Particularly suitable solid UV filters are selected from the group consisting of Bis-ethylhexyloxyphenol methoxyphenyl triazine, Butyl methoxydibenzoylmethane, Diethylaminohydroxybenzoyl hexyl benzoate, Ethylhexyl triazone, Diethylhexyl butamido triazone, 4-methylbenzylidene camphor and 1,4-di(benzoxazol-2′-yl)benzene and Methylene bis-benzotriazolyl tetramethylbutylphenol (Bisoctrizole).

[0102] Oxytriazole is a broad spectrum UV radiation filter that absorbs UV(B) and UV(A) rays and has excellent light stability. It has maximum absorption at 308nm and 349nm. However, in addition to absorbing UV light, it also reflects and scatters UV light. Oxytriazole is therefore a hybrid UV absorber, an organic UV filter produced as fine organic particles (<200nm). Where other organic UV filters need to be dissolved in either the oil phase or the water phase, Oxytriazole is poorly soluble in both phases and is applied as invisible particles.

[0103] Preferred solid organic UV(A) filters are UV(A) filters selected from the group consisting of bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoyl methane, diethylaminohydroxybenzoyl hexyl benzoate and terphenyl triazine.

[0104] Preferred solid organic UV (B) filters are selected from ethylhexyl triazone (= T150), diethylhexyl butyramido triazone (= HEB) and 4-methylbenzylidene camphor (= 5000).

[0105] Hair care compositions, in particular hair conditioners, may contain the usual oily and fatty components, which may be selected from: mineral oils and mineral waxes; oils, such as castor oil or triglycerides of capric and / or caprylic acid; oils or waxes and other natural or synthetic oils, in a preferred embodiment, esters of fatty acids with alcohols (e.g. isopropanol, propylene glycol, glycerol) or esters of fatty alcohols with carbonic acid or fatty acids; alkyl benzoates; and / or silicone oils.

[0106] Exemplary fatty substances that can be incorporated in particular into the oil phase of the emulsion, microemulsion, oleogel, aqueous dispersion or lipodispersion are advantageously chosen from: esters of saturated and / or unsaturated, linear or branched alkyl carboxylic acids having 3 to 30 carbon atoms and saturated and / or unsaturated, linear and / or branched alcohols having 3 to 30 carbon atoms, and esters of aromatic carboxylic acids and saturated and / or unsaturated, linear or branched alcohols having 3 to 30 carbon atoms. Such esters may advantageously be chosen from the group consisting of octyl palmitate, octyl cocoate, octyl isostearate, octyldodecyl myristate, cetearyl isononanoate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isononyl-isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, stearyl heptanoate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, tridecyl stearate, tridecyl trimellitate, and synthetic, semisynthetic or natural mixtures of these esters, for example jojoba oil.

[0107] Other fatty components (especially those suitable for hair conditioners) include polar oils, such as lecithin and fatty acid triglycerides, i.e. triglycerides of saturated and / or unsaturated, linear or branched carboxylic acids having 8 to 24 carbon atoms (preferably 12 to 18 carbon atoms), and the fatty acid triglycerides are preferably selected from synthetic, semi-synthetic or natural oils (e.g. coconut oil glyceride, olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, sweet almond oil, palm oil, coconut oil, castor oil, hydrogenated castor oil, wheat oil, grape seed oil, macadamia nut oil, etc.); non-polar oils, such as linear and / or branched hydrocarbons and waxes, such as mineral oil, petrolatum; paraffins, squalane and squalene, polyolefins, hydrogenated polyisobutene and isohexadecane, the preferred polyolefin being polydecene; dialkyl ethers, such as dicaprylyl ether; linear or cyclic silicone oils, such as preferably cyclomethicone (octamethylcyclotetrasiloxane; hexadecyldimethicone, hexamethylcyclotrisiloxane, polydimethylsiloxane, poly(methylphenylsiloxane) and mixtures thereof.

[0108] Other fatty components that can be advantageously incorporated into hair conditioners are isoeicosane; neopentyl glycol diheptanoate; propylene glycol dicaprylate / dicaprate; caprylic / capric / succinic diglycerides; butylene glycol caprylate / caprate; C 12-13 -Alkyl lactate; di-C 12-13 - alkyl tartaric acid esters; triisostearin; dipentaerythritol hexacaprylate / hexacaprate; propylene glycol monoisostearate; tricaprylin or dimethylisosorbid. It is particularly useful to use benzoic acid C 12-15 -Mixture of alkyl esters and 2-ethylhexyl isostearate, benzoic acid C 12-15 -Alkyl esters and a mixture of isotridecyl isononanoate and C benzoate 12-15 -A mixture of alkyl esters, 2-ethylhexyl isostearate and isotridecyl isononanoate.

[0109] The oil phase of the conditioner formulation may also include natural vegetable or animal waxes such as beeswax, chinawax, bumblebee wax and other insect waxes as well as shea butter and cocoa butter.

[0110] Suitable silicone oils are, for example, dimethylpolysiloxane, diethylpolysiloxane, diphenylpolysiloxane, cyclic siloxanes, poly(methylphenylsiloxane) and amino-, fatty acid-, alcohol-, polyether-, epoxy-, fluorine-, glycoside- and / or alkyl-modified siloxane compounds which are liquid or solid at room temperature and mixtures thereof. The number average molecular weight of polydimethylsiloxane and poly(methylphenylsiloxane) is preferably in the range of 100 to 150000 g / mol. Preferred cyclic siloxanes contain 4- to 8-membered rings and are commercially available, for example, as cyclomethicone.

[0111] The hair care composition is preferably a hair conditioner.

[0112] Furthermore, the hair care composition preferably does not contain any anionic surfactants and / or does not contain any nonionic surfactants. Even more preferably, the hair care composition is a hair conditioner that does not contain any anionic surfactants or any nonionic surfactants.

[0113] The hair care compositions, in particular shampoos or hair conditioners, may comprise further ingredients known and customary for the preparation of hair care compositions, in particular for shampoos or hair conditioners, respectively.

[0114] The hair care composition preferably comprises:

[0115] 0.015 to 12.0% by weight, in particular 0.5 to 11% by weight, preferably 1 to 10% by weight, more preferably 1.5 to 8% by weight, most preferably 2 to 6% by weight of a mixture of branched and linear saturated C15-C19 alkanes as described in detail above;

[0116] - 0.01-15.0% by weight, in particular 1-1-12% by weight, preferably 0.2-8.0% by weight, more preferably 0.6-7% by weight, even more preferably 0.8-6% by weight, most preferably 1.3-4% by weight of esters of dextrins and fatty acids as described in detail above;

[0117] - 0.5% to 10.0% by weight, preferably 1.0% to 6.0% by weight, of a cationic emulsifier as described in detail above;

[0118] - 50% to 99% by weight, preferably 80% to 95% by weight, of water,

[0119] Provided that the sum of the amounts of the individual ingredients does not exceed 100%.

[0120] Resistance of hair dye applied to hair

[0121] It has been observed that the hair care compositions as described above in detail result in an improved color fastness of hair dyes applied to the hair.

[0122] Colors are difficult to describe. One way to describe them is to use the so-called Lab color space. The most commonly used Lab method is the CIE-L color space proposed by CIE in 1976. * a * b * In this representation, the parameter "L" and the corresponding "L *” is the brightness, parameter “a” and the corresponding “a * " and "b" and the corresponding "b * ” is the colour-opponent dimension. The parameter L and the corresponding L * The value of is between 0 and 100, and the parameters a and b and the corresponding a * and b * The value is between -100 and 100.

[0123] Therefore, the color change is determined by L and the corresponding L * The change (=ΔL and the corresponding ΔL * ), a and the corresponding a * The change (=Δa and the corresponding Δa * ), b and the corresponding b * The change (=Δb and the corresponding Δb * ) to define.

[0124] Although the background theory is quite complex, decreasing values ​​of L and correspondingly L* result in the perception of a darker color. Increasing values ​​of a and correspondingly a* result in the perception of an enhanced red component. Increasing values ​​of b and correspondingly b* result in the perception of an enhanced yellow component.

[0125] Color changes are usually not just a single parameter L, a or b and the corresponding L * 、a * or b * rather, it is not a change in one of these parameters, but rather a change in multiple of these parameters simultaneously.

[0126] Therefore, the color difference is defined according to the following formula, with ΔE and the corresponding ΔE * express

[0127]

[0128] An assessment of the benefits of the present invention is best achieved by comparing the colour of dyed hair measured before and after a wash and / or conditioning cycle.

[0129] Hair dye

[0130] In principle, the invention relates to any hair dye known to the person skilled in the art.

[0131] Semi-permanent hair dye

[0132] In a preferred embodiment, the hair dye is a semi-permanent hair dye.

[0133] The advantage of semi-permanent hair dyes is that they are very easy to apply and suitable for regular use, and are a particularly gentle way of coloring hair on the hair and skin, as they do not use oxidizing agents. However, the number of different shades of hair color is somewhat more limited. In addition, semi-permanent hair dyes are not very suitable for coloring gray or white hair. Finally, semi-permanent hair dyes cannot be used to obtain lighter shades of the actual hair color, which limits the coloring possibilities for people with naturally dark or black hair color.

[0134] Semi-permanent hair dyes generally include compounds having chromophore systems common in dye chemistry, such as nitro, azo, anthraquinone, triphenylmethane, triarylmethane and azomethane, which can be used as disperse dyes, nitro dyes, cationic (basic) dyes, anionic (acid) dyes and metal complex dyes (as disclosed and indicated in Ullmann's Encyclopedia of Industrial Chemistry, Vol. A12, p. 586, 1989, fully revised 5th edition). Of particular interest are, for example, anthraquinone dyes, especially those containing dialkylaminoalkylamino (DAAA) groups. Specific examples include the following available from Warner Jenkinson Ltd. under the trademark Compounds obtained: ARIANOR Straw Yellow, ARIANOR Mahogany, ARIANOR Steel Blue, ARIANOR Madder Red, ARIANOR Ebony and ARIANOR Sienna Brown.

[0135] Furthermore, very suitable anthraquinone dyes are anthraquinones having quaternary ammonium side chains.

[0136] Specific examples of nitro dyes are compounds selected from 2-((2-nitrophenyl)amino)ethan-1-ol (CAS: 4926-55-0), 4-((2-hydroxyethyl)amino)-3-nitrophenol (CAS: 92952-81-3), 2-((4-amino-2-nitrophenyl)amino)ethan-1-ol (CAS: 2871-04), N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine (CAS: 84041-77-0) and 2,2'-((4-((2-hydroxyethyl)amino)imino)bisethanol) (CAS: 33229-34-4), 2-nitro-p-phenylenediamine (CAS: 5307-14-2) and 4-nitro-o-phenylenediamine (CAS: 99-56-9).

[0137] Semi-permanent hair dyes are commercially available in a wide variety of chemistries and colors. Particularly suitable as semi-permanent hair dyes are those implemented in commercial product lines selected from the group consisting of: of Professional Nutri Color TM filter, JohnFreida Violet Crush for Blondes from Kao Brands, Revolution Haircare Tones for Brunettes from , Good Dye Young from Good Dye Young, Wella Color by You from Coty and Syoss Color Glow from Schwarzkopf & Henkel.

[0138] Permanent hair dye

[0139] In another preferred embodiment, the hair dye is a permanent hair dye.

[0140] The advantages of permanent hair dye over other types of hair dye are that it offers the highest color fastness of any hair dye, has excellent color coverage, especially for white or gray hair, and offers the widest variety of available colors and shades. However, permanent hair dye is quite aggressive due to the chemical oxidation and fixing process.

[0141] Typically, permanent hair dyes are produced from permanent hair coloring compositions which require three components:

[0142] (1) Primary intermediate reagents,

[0143] (2) a coupling agent, and

[0144] (3) Oxidants.

[0145] The formation process of permanent hair dyes is typically carried out under alkaline conditions by using an alkalizing agent.

[0146] The oxidation mechanism consists of three steps:

[0147] 1) Oxidation of primary intermediates;

[0148] 2) its reaction with a coupling agent; and

[0149] 3) Oxidizing the obtained compound with an oxidizing agent to obtain the final dye.

[0150] The oxidizing agent is usually hydrogen peroxide, and the alkaline environment is usually provided by ammonia. The combination of hydrogen peroxide and ammonia lightens natural hair, providing a "blank canvas" for the dye. The ammonia opens the hair shaft pores, allowing the dye to actually diffuse into the interior of the fiber. These dye intermediates and coupling agents can undergo oxidation and coupling reactions to form high molecular weight products that are trapped in the hair matrix and cannot be easily removed by washing.

[0151] Primary intermediate reagents

[0152] The use of primary intermediate agents in hair dyes is well known and comprises an ortho- or para-substituted aminophenol or phenylenediamine, particularly p-phenylenediamine of the formula:

[0153]

[0154] Where R 11 and R 12 are independently hydrogen, C 1-6 -alkyl, or phenyl substituted with one or more hydroxyl, methoxy, methylsulfonylamino, aminocarbonyl, furfuryl, unsubstituted phenyl or amino. 1-6 -alkyl; and

[0155] R 13 , R 14 , R 15 and R 16 are independently hydrogen, C 1-6 -alkyl, C 1-6 -alkoxy, halogen or C substituted by one or more hydroxyl or amino groups 1-6 -alkyl.

[0156] Preferred primary intermediate reagents are selected from the group consisting of p-phenylenediamine, 2-methyl-1,4-diaminobenzene, 2,6-dimethyl-1,4-diaminobenzene, 2,5-dimethyl-1,4-diaminobenzene, 2,3-dimethyl-1,4-diaminobenzene, 2-chloro-1,4-diaminobenzene, 2-methoxy-1,4-diaminobenzene, 1-phenylamino-4-aminobenzene, 1-dimethylamino-4-aminobenzene, 1-diethylamino-4-aminobenzene, 1-bis(β-hydroxyethyl)amino-4- Amino, ethyl benzoate, 1-methoxyethylamino-4-aminobenzene, 2-hydroxymethyl-1,4-diaminobenzene, 2-hydroxyethyl-1,4-diaminobenzene, 2-isopropyl-1,4-diaminobenzene, 1-hydroxypropylamino-4-aminobenzene, 2,6-dimethyl-3-methoxy-1,4-diaminobenzene, 1-amino-4-hydroxybenzene, 1-hydroxyethyl 4,5-diaminopyrazole, 6-methoxy-2-methylamino-3-aminopyridine and derivatives thereof, and acid salts thereof or basic salts thereof.

[0157] Particularly preferred primary intermediate reagents are p-phenylenediamine, p-aminophenol, o-aminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, 2,5-diaminotoluene, their salts and mixtures thereof.

[0158] Color coupling agent

[0159] The color coupler is particularly selected from the group consisting of: m-aminophenol, 2,4-diaminotoluene, 4-amino-2-hydroxytoluene, phenylmethylpyrazolone, (3-methyl-1-phenyl-5-pyrazolone), 3,4-methylenedioxyphenol, 3,4-methylenedioxy-1-[(β-hydroxyethyl)amino]benzene, 1-methoxy-2-amino-4-[(β-hydroxyethyl)amino]benzene, 1-hydroxy-3-(dimethylamino)benzene, 6-methyl-1-hydroxy-3[(β-hydroxyethyl)amino]phenyl, 2,4-dichloro-1-hydroxy-3-aminobenzene, 1-hydroxy-3-(diethylamino)benzene, 1-hydroxy-2-methyl-3-aminobenzene, 2-chloro-6-methyl-1- Hydroxy-3-aminobenzene, 1,3-diaminobenzene, 6-methoxy-1,3-diaminobenzene, 6-hydroxyethoxy-1,3-diaminobenzene, 6-methoxy-5-ethyl-1,3-diaminobenzene, 6-ethoxy-1,3-diaminobenzene, 1-bis(β-hydroxyethyl)amino-3-aminobenzene, 2-methyl-1,3-diaminobenzene, 6-methoxy-1-amino-3-[(β-hydroxyethyl)amino]-benzene, 6-(β-aminoethoxy)-1,3-diaminobenzene, 6-(β-hydroxyethoxy)-1-amino-3-(methylamino)benzene, 6-carboxymethoxy-1,3-diaminobenzene, 6-ethoxy-1-bis(β-hydroxyethyl)amino-3-aminobenzene, 6- Hydroxyethyl-1,3-diaminobenzene, 1-hydroxy-2-isopropyl-5-toluene, 1,3-dihydroxybenzene, 2-chloro-1,3-dihydroxybenzene, 2-methyl-1,3-dihydroxybenzene, 4-chloro-1,3-dihydroxybenzene, 5,6-dichloro-2-methyl-1,3-dihydroxybenzene, 1-hydroxy-3-aminobenzene, 1-hydroxy-3-(carbamoylmethylamino)benzene, 6-hydroxybenzomorpholine, 4-methyl-2,6-dihydroxypyridine, 2,6-dihydroxypyridine, 2,6-diaminopyridine, 6-aminobenzomorpholine, 1-phenyl-3-methyl-5-pyrazolone, 1-hydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,5-dihydroxynaphthalene, 5-amino-2-methylphenol, 4 -Amino-2-hydroxytoluene, 2-amino-3-hydroxytoluene, 2-amino-5-hydroxytoluene, 4-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindole, 6-hydroxyindoline, 2,4-diaminophenoxyethanol, 1-naphthol, 2-naphthol, phenol, catechol, m-aminophenol, m-phenylenediamine, phenol substituted with at least one alkyl, hydroxyalkyl or alkylamino group on the amino group or benzene ring; catechol substituted with at least one alkyl, hydroxyalkyl or alkylamino group on the amino group or benzene ring; m-aminophenol substituted with at least one alkyl, hydroxyalkyl or alkylamino group on the amino group or benzene ring; m-phenylenediamine substituted with at least one alkyl, hydroxyalkyl or alkylamino group on the amino group or benzene ring; and mixtures thereof.

[0160] Preferred coupling agents are selected from the group consisting of resorcinol, 1-naphthol, 2-methylresorcinol, 4-amino-2-hydroxytoluene, m-aminophenol, 2,4-diaminophenoxyethanol, 3-methyl-1-phenyl-5-pyrazolone, salts thereof or mixtures thereof.

[0161] Alkalizing agent

[0162] Preferably, the permanent hair coloring composition comprises an alkalizing agent. The term "alkalizing agent" refers to an ingredient that is capable of imparting alkalinity (e.g., a pH greater than 7) to an oxidized composition. Preferred alkalizing agents are ammonium hydroxide, metal hydroxides, alkanolamines, sodium silicates, metal carbonates, sodium metasilicates, and mixtures thereof. Suitable metal hydroxides and carbonates include alkali metal and alkaline earth metal hydroxides or carbonates. Examples of such metal hydroxides are sodium, potassium, lithium, calcium, magnesium or. A particularly preferred alkaline earth metal hydroxide is sodium hydroxide. Preferably, the alkanolamine is selected from the group consisting of mono-alkanolamines, di-alkanolamines and trialkanolamines, such as monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), 2-aminobutanol, aminoethylpropylene glycol, aminomethylpropylene glycol, bis-hydroxyethyltrimethylolmethylamine (=bis(2-hydroxyethyl)amino-tris-(hydroxymethyl)methane), diethylethanolamine, diisopropanolamine, dimethylaminomethylpropanol, dimethyl MEA (=2-(dimethylamino)-ethan-1-ol), isopropanolamine, methylethanolamine, mixed isopropanolamines, triisopropanolamine, triisopropanolamine, trimethylolmethylamine (=tris(hydroxymethyl)aminomethane) and mixtures thereof. A particularly preferred alkanolamine is monoethanolamine (MEA).

[0163] Most preferred are dye mixtures containing ammonium hydroxide as the alkalizing agent in combination with a second alkalizing agent such as an alkanolamine.

[0164] Permanent hair coloring compositions are commercially available in a variety of chemistries and colors. Particularly suitable as permanent hair dyes are those available in commercial product lines selected from the group consisting of: Schwarzkopf Brilliance from Schwarzkopf, Schwarzkopf got2b Edelmetall from Schwarzkopf & Henkel, L'Oréal Préférence Vivid Colors from L'Oréal, Total Color TM, Schwarzkopf Brilliance Gem Collection from Schwarzkopf & Henkel, Wella Professional Koleston Perfect Pure Naturals from Wella, Wella Koleston from Coty, Beautycolor Bela&Cor from Bonyplus, Miracle System from Josh Wood Colour, Garnier Nutrisse Ultra Crème Permanent Hair Color from L’Oréal and Hello!! BubbleFoam Color-Mise en Scène from Amorepacific.

[0165] As mentioned above, it has been observed that the hair care compositions as described in detail above result in an improved color fastness of the hair dye applied to the hair.

[0166] Thus, in another aspect, the present invention relates to the use of a mixture of branched and linear saturated C15-C19 alkanes in combination with dextrin and esters of fatty acids and a cationic emulsifier for improving the color fastness of a hair dye applied to the hair.

[0167] More specifically, the hair dye is a semi-permanent hair dye in one preferred embodiment and a permanent hair dye in another preferred embodiment.

[0168] Example

[0169] The following examples are provided to further illustrate the compositions and effects of the present invention. These examples are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0170] Experimental Series 1: Semi-permanent Hair Dye

[0171] Coloring hair with semi-permanent hair dye

[0172] The hair tresses (Kerling NR. 826204KTDicht, European hair, remis extra bleached, colour 10 / 0, length: 120 mm) had been dyed according to the instructions provided in the packaging of the semi-permanent hair dye.

[0173] -Revelon Nutri Color TMFilters 190 Blau (containing the semi-permanent hair dye HC Blue No. 16 (dimethyl-[3-[[4-(methylamino)-9,10-dioxoanthracen-1-yl]amino]propyl]-propylazanium bromide));

[0174] -Revelon Nutri Color TM Filters 200 Violet (containing semi-permanent hair dye HC Blue No. 16 and Basic Violet 2 (= 4-[(4-amino-3-methylphenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-2-methylanilinehydrochloride));

[0175] -Revelon Nutri Color TM Filters 740 Light Copper (containing the semi-permanent hair dyes Basic Brown 17 (= [8-[(4-amino-2-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammoniumchlorid) and Basic Red 76 (= [7-hydroxy-8-[(2-methoxyphenyl)azo]-2-naphthyl]trimethylammoniumchlorid);

[0176] -Revelon Nutri Color TMFilters 524 Coppery Pearl Brown Copper (including semi-permanent hair dye Basic Brown 17, Basic red 51 (=2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride), Basic Yellow 57 (=3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-N,N,N-phenyltrimethylammonium chloride), Basic Violet 2, HC Blue No.16).

[0177] The tresses had been treated with 1 ml of undiluted hair dye for 5 minutes. The tresses were rinsed with warm water (38°C) for 30 seconds and dried overnight at room temperature. Three tresses were prepared for each sample.

[0178] Shampooing / conditioning hair that has been dyed with semi-permanent hair dye

[0179] For each shampooing / conditioning cycle, the dyed hair tresses have been washed with 0.5 ml of a shampoo according to the composition of Table 1 for 30 seconds per tress, then rinsed with warm water (38° C.) for 30 seconds. 0.5 ml of the corresponding conditioner (composition see Table 2) was then applied to each tress, the conditioner remained on the tress for 2 minutes and washed off by rinsing with warm water (38° C.) for 30 seconds. This process has been repeated 5 times, so that for each shampooing / conditioning cycle, the tresses have been washed / conditioned a total of 5 times. At the end of each shampooing / conditioning cycle, the tresses were dried overnight at room temperature.

[0180]

[0181] Table 1 Composition of shampoo.

[0182] *Amounts in % by weight.

[0183] Hair care composition

[0184] The cosmetic compositions listed in Table 1 have been prepared according to standard methods in the art.

[0185] Color Measurement

[0186] The L*a*b*-values ​​of the hair tresses have been determined before the first shampooing / washing cycle (i.e. "after 0 cycles") and after the respective shampooing / conditioning cycles (i.e. "after 1 cycle", "after 2 cycles", etc.) using a Konica Minolta-CM 600d color measuring device. The respective 3 hair tresses were positioned next to each other and the L*a*b*-values ​​have been measured 25 times and their average values ​​have been reported in Tables 3, 5, 7 and 9. The color changes indicated as ΔL*, Δa*, Δb* and ΔE* in Tables 4, 6, 8 and 10 are calculated from the initial values ​​and the color measurements after the respective shampooing / conditioning cycles.

[0187]

[0188]

[0189]

[0190]

[0191]

[0192] Experimental Series 2: Semi-permanent Hair Dye (II)

[0193] The experiments of experimental series 2 were carried out in the same way as experimental series 1, with the only exception that the hair tresses (Kerling NR.826204KT Dicht, European hair, remis extra bleached, color 10 / 0, length: 120 mm) were from a different batch.

[0194] Semi-permanent hair dyes used in the second series, including:

[0195] -Revelon Nutri Color TM Filters 190 Blau (containing the semi-permanent hair dye HC Blue No. 16 (dimethyl-[3-[[4-(methylamino)-9,10-dioxoanthracen-1-yl]amino]propyl]-propylazanium bromide));

[0196] -Revelon Nutri Color TMFilters 200 Violet (containing semi-permanent hair dye HC Blue No. 16 and Basic Violet 2 (= 4-[(4-amino-3-methylphenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-2-methylanilinehydrochloride));

[0197] - Schwarzkopf Pillar Box Red 092 (containing the semi-permanent hair dyes Basic Orange 31 (= 2-[(4-Aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride) and Basic Red 51 (= 2-((4-(Dimethylamino)phenyl)azo)-1,3-dimethyl-1H-imidazoliumchloride)).

[0198] For this series, the cosmetic compositions outlined in Table 11 were used.

[0199]

[0200]

[0201]

[0202]

[0203] Experiment Series 3: Permanent Hair Dye

[0204] Coloring hair with permanent hair dye

[0205] Hair tresses (Kerling NR. 826204KT Dicht, European hair, remis extra bleached, color 10 / 0, length: 120 mm) (same batch as in experimental series 1) have been dyed according to the instructions provided in the packaging of the respective commercially available permanent hair dye,

[0206] Schwarzkopf Brilliance Intensive Color Crème, 849 Violette Wildseide (fully contained multi-compartment packaging (i.e. a color cream portion containing 6-methoxy-2-methylamino-3-aminopyridine (primary intermediate reagent) and 4-amino-2-hydroxytoluene (color coupler); and a developer portion (containing hydrogen peroxide (oxidizing agent)); or

[0207] ·Schwarzkopf Brilliance Intensive Color Crème, 872 Intensivrot

[0208] (Fully contained multi-compartment packaging (i.e. containing 2,5-diaminotoluene sulfate, 1-hydroxyethyl 4,5-diaminopyrazole sulfate (primary intermediate) and 2-amino-3-hydroxytoluene,

[0209] a color cream portion of 2-amino-3-hydroxytoluene (=2-amino-5-hydroxytoluene) (color coupler); and a developer portion (comprising hydrogen peroxide (oxidizing agent)), or

[0210] ·Schwarzkopf Brilliance Intensive Color Crème, 867Mahagoni-

[0211] Braun (fully contained multi-compartment package (i.e., a color cream portion containing toluene 2,5-diamine sulfate (primary intermediate), 2-amino-3-hydroxypyridine, 2,7-naphthalene diol, 2-methylresorcinol (color coupler); and a developer portion containing hydrogen peroxide (oxidizing agent)).

[0212] Place the entire contents of the cream portion of the color into the developer bottle containing the oxidizing agent and shake until the composition is completely mixed. Then apply the entire bottle of composition to the hair at once, ensuring that it is evenly distributed. The color is then left on the hair for 30-45 minutes. After the exposure time (30-45 minutes), rinse the tresses with warm water (38°C) until the water becomes colorless. Then apply the conditioner contained in the package to the tresses and leave it on for 2 minutes. Then wash out the conditioner at a water temperature of 38°C for 30 seconds. The tresses are dried overnight at room temperature.

[0213] The hair tresses were cut into 1.0 cm wide tresses. For each test, 3 hair tresses were prepared.

[0214] The color of the dyed hair tresses was measured using the color measurement method described below under "Color Measurement" to obtain initial L*, a*b* values ​​(ie, after 0 cycles").

[0215] Shampooing / conditioning hair that has been treated with permanent hair dye

[0216] For each shampooing / conditioning cycle, the dyed hair tresses have been washed with 0.5 ml of a shampoo according to the composition of Table 1 for 30 seconds per tress, then rinsed with warm water (38° C.) for 30 seconds. 0.5 ml of the corresponding conditioner (composition see Table 2) was then applied to each tress, the conditioner remained on the tress for 2 minutes and washed off by rinsing with warm water (38° C.) for 30 seconds. This process has been repeated 9 times, so that for each shampooing / conditioning cycle, the tresses have been shampooed, washed and conditioned a total of 10 times. At the end of each shampooing / conditioning cycle, the tresses were dried overnight at room temperature.

[0217] Color Measurement

[0218] The L*a*b*-values ​​of the hair tresses have been determined using a Konica Minolta-CM 600d color measuring device, respectively before the first shampooing / conditioning cycle (i.e. "after 0 cycles") and after the respective shampooing / conditioning cycle (i.e. "after 1 cycle", "after 2 cycles", etc.). The respective 3 hair tresses were positioned next to each other and the L*a*b*-values ​​have been measured 25 times and their average values ​​have been reported in Tables 18, 20 and 22. The color changes indicated as ΔL*, Δa*, Δb* and ΔE* in Tables 19, 21 and 23 are calculated from the initial values ​​and the color measurements after the respective shampooing / conditioning cycle.

[0219] The results of Tables 3-23 show that the hair care compositions of the present invention (i.e., 1, 2, 3 and 4) exhibit significantly higher color fastness with semi-permanent and permanent hair dyes than the comparative hair compositions (i.e., Ref. 1, Ref. 2, Ref. 3 and Ref. 4). This improvement in higher color fastness is very advantageous to the end consumer, as the hair color remains more or less visually constant over a longer period of time, and thus prolongs the time before the next hair coloring is needed.

[0220]

[0221]

[0222]

Claims

1. A hair care composition comprising - a mixture of branched and linear saturated C15-C19 alkanes; and - esters of dextrin and fatty acids; and -Cationic emulsifier Wherein the amount of branched saturated C15-C19 alkanes in the mixture of branched and linear saturated C15-C19 alkanes is greater than 80 wt%, preferably greater than 90 wt%, most preferably greater than 92 wt%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

2. The hair care composition according to claim 1, characterized in that The amount of linear saturated C15-C19 alkanes in the mixture of branched and linear saturated C15-C19 alkanes is less than 10 wt%, preferably less than 8 wt%, and most preferably greater than 5 wt%, relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

3. The hair care composition according to claim 1 or 2, characterized in that The amount of branched saturated C18 alkanes is greater than 50% by weight, preferably greater than 60% by weight, even more preferably greater than 70% by weight relative to the weight of the mixture of branched and linear saturated C15-C19 alkanes.

4. A hair care composition according to any one of the preceding claims, characterized in that The fatty acid of the ester of dextrin and fatty acid is a C14-C18 fatty acid, in particular a straight-chain C14-C18 fatty acid, most preferably palmitic acid.

5. A hair care composition according to any one of the preceding claims, characterized in that The average saccharide polymerization degree of the dextrin of the ester of dextrin and fatty acid is 3 to 20, especially 8 to 16.

6. A hair care composition according to any one of the preceding claims, characterized in that The esters of dextrin and fatty acids have an average number of esterified hydroxyl groups per glucose unit greater than 2.5, preferably between 2.5 and 3.5, more preferably between 2.5 and 3.4, most preferably between 2.5 and 3.

2.

7. A hair care composition according to any one of the preceding claims, characterized in that The ester of dextrin and fatty acid has a molecular weight M between 8000 and 16000 Da, preferably between 9000 and 13000 Da, more preferably between 10000 and 11500 Da. n .

8. A hair care composition according to any one of the preceding claims, characterized in that The cationic emulsifier is an organic ammonium compound, especially a quaternary ammonium compound.

9. A hair care composition according to any one of the preceding claims, characterized in that The cationic emulsifier is a substance defined by a CAS number selected from the group consisting of [17301-53-0], [92201-88-2], [1156505-34-8] and [51277-96-4].

10. A hair care composition according to any one of the preceding claims, characterized in that The amount of cationic emulsifier ranges from 0.5 to 10 wt%, in particular 0.5 to 8 wt%, preferably 1 to 6 wt%, based on the weight of the hair care composition.

11. A hair care composition according to any one of the preceding claims, characterized in that Based on the weight of the hair care composition, the amount of the mixture of branched and linear saturated C15-C19 alkanes is between 0.015 and 12.0 wt. %, in particular between 0.5 and 11.0 wt. %, preferably between 1.0 and 10.0 wt. %, more preferably between 1.5 and 8.0 wt. %, even more preferably between 2.0 and 6.0 wt. %.

12. A hair care composition according to any one of the preceding claims, characterized in that The hair composition is a hair conditioner.

13. A hair care composition according to any one of the preceding claims, characterized in that The composition does not contain any anionic surfactant or any nonionic surfactant.

14. Use of a mixture of branched and linear saturated C15-C19 alkanes in combination with dextrin and esters of fatty acids and a cationic emulsifier for improving the color fastness of a hair dye applied to the hair.

15. The use according to claim 14, characterized in that The hair dye is a semi-permanent hair dye.

16. The use according to claim 14, characterized in that The hair dye is a permanent hair dye.

Images