Dyeing products containing ammonium salts for keratin fibres

Abstract

The present invention relates to a dyeing product for keratin fibres, preferably human keratin fibres, more preferably human hair, characterized in that said dyeing product comprises at least a composition A and a composition B, composition A comprising: a) one or more hair direct dyes, and b) one or more alkalizing agents; the composition B is a water-based composition, the pH range of the composition B is 1-6, and the composition B comprises c) one or more ammonium salts with the following general formula: NH4 < + > Y <->, and in the formula, Y <-> is anions except OH <-> and CO3 < 2->; wherein the total concentration of the oxidant in the composition B is less than 1 wt%, preferably less than 0.1 wt%, and more preferably, the composition B does not contain the oxidant based on the total weight of the composition B.

Description

Technical Field

[0001] This invention relates to a dyeing product comprising at least composition A and composition B, wherein composition B comprises an ammonium salt. Furthermore, composition C for dyeing, a method thereof, and its use are also disclosed. Background Technology

[0002] Direct dyes offer certain safety advantages compared to their oxidizing counterparts, but they typically suffer from lower dyeing performance. Therefore, many past inventions have focused on improving the dyeing effects of oxidizing dyes, which already possess superior dyeing strength.

[0003] For example, EP3427719 discloses combining ammonium salts with oxidizing dyes in oxidizing compositions. However, this document does not address direct dyes, nor does it address acidic compositions with low or absent oxidizing agent content.

[0004] WO2020 / 127250 discloses a technique for combining specific direct dyes with alkylated ammonium salts to improve dyeing strength. This invention, however, uses unalkylated ammonium salts.

[0005] Therefore, despite attempts with existing technologies, the challenges of insufficient dyeing strength and wash fastness of direct dyes remain unresolved. Consequently, there is a real need to develop dyeing products that can improve upon those using direct dyes. Summary of the Invention

[0006] The first objective of this invention is to provide a dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the dyeing product comprises at least composition A and composition B.

[0007] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and

[0008] - Composition B is an aqueous composition having a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula:

[0009] NH4 + Y - ,

[0010] In the formula, Y - To remove OH - and CO3 2- Other anions;

[0011] The total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably composition B does not contain oxidant, based on the total weight of composition B.

[0012] A second objective of this invention is to provide a method for dyeing keratin fibers, preferably human keratin fibers, and more preferably human hair, comprising the following steps:

[0013] i) Provide composition A as defined above;

[0014] ii) Provide composition B as defined above;

[0015] iii) Before applying the composition from steps i) and ii), mix the compositions to obtain a ready-to-use composition with a pH range of 7 to 12.

[0016] iv) Apply the ready-to-use composition to keratin fibers for a period of 1 to 60 minutes;

[0017] v) Selectively rinse keratin fibers.

[0018] A third object of the present invention is to provide the use of a composition for enhancing the dyeing strength and wash fastness of one or more direct dyes on keratin fibers, preferably human keratin fibers, more preferably human hair, wherein the composition is defined as composition B above, wherein composition B as defined above is mixed with composition A before being applied to the keratin fibers. Detailed Implementation

[0019] The inventors of this invention have unexpectedly and surprisingly discovered that the dyeing products, compositions, methods, and uses according to this invention improve the dyeing intensity and wash fastness of direct dyes. Furthermore, the dyed keratin fibers exhibit excellent appearance with minimal or no damage.

[0020] dyeing products

[0021] This invention relates to a dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the dyeing product comprises at least composition A and composition B.

[0022] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and

[0023] - Composition B is an aqueous composition having a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula:

[0024] NH4 + Y - ,

[0025] In the formula, Y - To remove OH - and CO3 2-Other anions;

[0026] The total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably, composition B does not contain oxidant based on the total weight of composition B.

[0027] From the perspective of wash fastness, it is preferable that the total concentration of oxidant in composition A is less than 1% by weight, more preferably less than 0.1% by weight, based on the total weight of composition A, and more preferably composition A does not contain oxidant.

[0028] From the perspective of wash fastness and damage reduction, the dyeing product is further preferred to be a non-oxidative dyeing product.

[0029] From the perspective of reducing damage, it is preferable that the total concentration of oxidant in composition A is less than 1% by weight, more preferably less than 0.1% by weight, and more preferably composition A is free of oxidant based on the total weight of composition A. Particularly preferred is that composition A is free of oxidizing bleaching compounds, such as persalt and / or peracid salts and hydrogen peroxide.

[0030] From the perspective of dyeing strength and wash fastness, one or more ammonium salts having the following general formula are further preferred: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions have a molar mass of less than 300 g / mol.

[0031] From the perspective of reducing damage, the dyeing product of the present invention is further preferred to be a non-oxidizing dyeing product. In the context of the present invention, "non-oxidizing" means that the product does not contain oxidizing agents.

[0032] In this case, composition B does not contain an oxidizing agent, and composition A also does not contain an oxidizing agent.

[0033] Therefore, the present invention also relates to a non-oxidative dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the non-oxidative dyeing product comprises at least composition A and composition B.

[0034] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents;

[0035] - Composition B is an aqueous composition having a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula:

[0036] NH4 + Y - ,

[0037] In the formula, Y - To remove OH - and CO3 2- Other anions;

[0038] In this composition, neither composition A nor composition B contains an oxidizing agent.

[0039] From the perspective of reducing damage, the dyeing product of the present invention is further preferred to be a non-reducing dyeing product. In the context of the present invention, "non-reducing" means that the product does not contain reducing agents.

[0040] Therefore, the present invention also relates to a non-oxidizing and non-reducing dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the non-oxidizing and non-reducing dyeing product comprises at least composition A and composition B.

[0041] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents;

[0042] Composition B is an aqueous composition with a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions;

[0043] Composition B does not contain a reducing agent.

[0044] The appropriate weight mixing ratio of composition A and composition B in the dyeing product of the present invention ranges from 0.1 to 10, preferably from 0.2 to 5, more preferably from 0.3 to 3, and the most preferred weight mixing ratio of composition A and composition B in the dyeing product of the present invention is 1.

[0045] From the perspective of dyeing intensity, it is preferred that composition A comprises one or more compounds according to group a) being one or more nonionic direct dyes and / or anionic direct dyes, and / or salts thereof, and / or mixtures thereof.

[0046] From the perspective of staining intensity, composition A is particularly preferred if one or more compounds according to group a) are Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, and Acid Red 87. Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow 8, D&C Brown 1, D&C Green 5, D&C Green 8, D&C Orange 4, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2 No. 7, D&C Yellow 7, D&C Yellow 8, D&C Yellow 10, FD&C Red 2, FD&C Red 40, FD&C Red 4, FD&C Yellow 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9, Disperse Violet 1, Acid Red 52, DC Violet 2, DC Red 33, DC Orange 4, DC Red 27, DC Yellow 10, HC Blue 18, HC Red 18, HC Yellow 16, Alkaline Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic Red 51, Basic Yellow 87, HC Blue 17, and Basic Orange 31. More preferred dyes include: Basic Red 51, Basic Yellow 87, Basic Orange 31, HC Blue 17, Basic Blue 124, HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown 2, HC Green 1, HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Red BN, HC Red 1, HC Red 3, HC Red 7, HC Red 8, H C Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 54, HC Red 14, HC Purple BS, HC Purple 1, HC Purple 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Yellow 13, HC Yellow 14, HC Yellow 15, HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or their salts, and / or mixtures thereof.

[0047] From the perspective of dyeing strength and wash fastness, it is more preferable that the compounds according to group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or their salts, and / or mixtures thereof.

[0048] From the perspectives of dyeing intensity, color vibrancy, and cosmetic safety, the most preferred compounds according to group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, and / or their salts, and / or mixtures thereof.

[0049] From the perspective of dyeing intensity, it is preferred that the total concentration of one or more compounds according to group a) in composition A is 0.05% by weight or more, more preferably 0.1% by weight or more, and even more preferably 0.25% by weight or more, based on the total weight of composition A.

[0050] From the perspective of cosmetic safety, it is preferred that the total concentration of one or more compounds according to group a) in composition A is 15% by weight or less, more preferably 12% by weight or less, and even more preferably 10% by weight or less, based on the total weight of composition A.

[0051] To achieve the above-mentioned effects, the total concentration of one or more compounds according to group a) in composition A is preferably 0.05 to 15% by weight, more preferably 0.1 to 12% by weight, and even more preferably 0.25 to 10% by weight, calculated based on the total weight of composition A.

[0052] From the perspective of staining intensity, it is further preferred that one or more compounds according to group b) are selected from one or more organic alkalizing agents and / or ammonium hydroxide.

[0053] Preferably, one or more compounds according to group b) are one or more alkanolamines and / or their salts and / or ammonium hydroxide; more preferably, one or more compounds according to group b) are selected from monoethanolamine, diethanolamine, monoethanol methylamine, monoethanol dimethylamine, diethanol methylamine, monoethanol ethylamine, monoethanol diethylamine, diethanol ethylamine, monoethanol propylamine, monoethanol dipropylamine, diethanol propylamine, monoethanol butylamine, diethanol butylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, and / or their salts, and / or mixtures thereof; most preferably, they are selected from monoethanolamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, ammonium hydroxide, and / or mixtures thereof.

[0054] Ammonium hydroxide is listed as an alkalizing agent of composition A according to group b), meaning that those skilled in the art will note that ammonium hydroxide is not an ammonium salt in the sense of a compound according to group c). Ammonium hydroxide is an aqueous solution of the gaseous compound ammonia, from which a solid salt cannot be obtained at 25°C and atmospheric pressure.

[0055] From the perspective of alkalinity and dyeing strength, it is preferable that the total concentration of one or more compounds according to group b) in composition A is 0.1% by weight or more, preferably 0.25% by weight or more, and more preferably 0.5% by weight or more, calculated based on the total weight of composition A.

[0056] From the perspective of alkalinity, dyeing strength and cosmetic safety, it is preferable that the total concentration of one or more compounds according to group b) in composition A is 30% by weight or less, preferably 25% by weight or less, more preferably 20% by weight or less, calculated based on the total weight of composition A.

[0057] To achieve the above-mentioned effects, the total concentration of one or more compounds according to group b) in composition A is preferably 0.1 to 30% by weight, more preferably 0.25 to 25% by weight, and more preferably 0.5 to 20% by weight, calculated based on the total weight of composition A.

[0058] Product form of composition A

[0059] From one aspect of the present invention, composition A is a powder composition, and the water content is 10% by weight or less, preferably 1% by weight or less, more preferably 0.1% by weight or less, and more preferably an anhydrous powder composition based on the total weight of composition A.

[0060] The term "powder" refers to a free-flowing solid composition consisting of individual particles or clumps of micron or submicron size under atmospheric pressure and temperature conditions of 25°C.

[0061] The term "anhydrous" means that no additional water is added. However, this does not preclude the presence of adsorbed water or water of crystallization in the powder components. In any case, the presence of a certain amount of water will not change the physical aggregate state of the composition as a powder.

[0062] When composition A is a powder composition, from a cosmetic acceptability perspective, composition A preferably contains one or more powdered excipients. The term "excipient" refers to other compounds in composition A that can act as fillers and dispersants, do not react with dyes or alkalizing agents, and thus impart a certain degree of storage stability to the powder over a longer period of time.

[0063] When composition A of the present invention is a powder composition, it may contain organic powdered excipients and / or inorganic powdered excipients to disperse the dye therein.

[0064] From a stability perspective, suitable organic powdered excipients and / or inorganic powdered excipients include, for example, diatomaceous earth, kaolin, bentonite, starch, especially corn starch, cassava starch, rice starch, wheat starch and potato starch, nylon powder, montmorillonite, gypsum, sawdust and perlite, with corn starch being more preferred.

[0065] From the perspective of achieving good dispersibility of dye in powder and rapid solubility of powder, it is preferable that the total concentration of powdered excipients in composition A, more preferably the total concentration of organic powdered excipients and / or inorganic powdered excipients, is 30% by weight or more, more preferably 50% by weight or more, further preferably 60% by weight or more, even more preferably 65% ​​by weight or more, even more preferably 70% by weight or more, and even more preferably 75% by weight or more, calculated based on the total weight of composition A.

[0066] From the perspective of achieving good dispersibility of dyes in powder and freedom of formulation, it is preferable that the total concentration of powdered excipients in composition A, more preferably the total concentration of organic powdered excipients and / or inorganic powdered excipients, is 98% by weight or less, more preferably 95% by weight or less, and even more preferably 90% by weight or less, calculated based on the total weight of composition A.

[0067] To achieve the above effects, the total concentration of the powdered excipient in composition A is preferably 10-98% by weight, more preferably 15-95% by weight, further preferably 20-90% by weight, even more preferably 25-90% by weight, even more preferably 30-90% by weight, and even more preferably 55-90% by weight, calculated based on the total weight of composition A.

[0068] Therefore, the present invention also relates to a dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the dyeing product comprises at least composition A and composition B.

[0069] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and

[0070] Composition B is an aqueous composition with a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions;

[0071] Wherein, the total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably, composition B does not contain oxidant based on the total weight of composition B;

[0072] Wherein, composition A is a powder composition, and the water content is less than 10% by weight, preferably less than 1% by weight, more preferably less than 0.1% by weight. Calculated based on the total weight of composition A, composition A is further preferably an anhydrous powder composition.

[0073] Composition A comprises one or more powdered excipients;

[0074] The total concentration of the powdered excipient in the preferred composition A, more preferably the total concentration of organic powdered excipient and / or inorganic powdered excipient, ranges from 10 to 98% by weight, more preferably from 15 to 95% by weight, further preferably from 20 to 90% by weight, even more preferably from 25 to 90% by weight, even more preferably from 30 to 90% by weight, and even more preferably from 55 to 90% by weight, calculated based on the total weight of composition A.

[0075] From another aspect of the invention, from the viewpoint of dye stability, composition A is a liquid composition at 25°C and atmospheric pressure, contains one or more organic solvents, and contains less than 10% by weight of water, preferably less than 1% by weight, more preferably less than 0.1% by weight, calculated based on the total weight of composition A; it is further preferred that composition A is anhydrous and liquid at 25°C and atmospheric pressure.

[0076] The term "liquid" refers to the physical state at 25°C and atmospheric pressure, meaning that the dyeing composition is liquid at room temperature.

[0077] In this aspect of the invention, the composition may contain one or more organic solvents.

[0078] An organic solvent may be selected to dissolve the compounds in a) through b). Preferred solvents are monohydric alcohols, dihydric alcohols and trihydric alcohols, and / or mixtures thereof.

[0079] From the perspective of cosmetic safety and solubility, preferred monohydric alcohols, dihydric alcohols and trihydric alcohols are ethanol, n-propanol, isopropanol, propylene glycol, ethylene glycol, benzyl alcohol, phenoxyethanol and glycerin, and / or mixtures thereof.

[0080] From the perspective of solution stability, it is further preferred that the total concentration of organic solvent in composition A is 75% by weight or more, more preferably 80% by weight or more, and even more preferably 85% by weight or more, calculated based on the total weight of composition A.

[0081] From the perspective of dyeing intensity, it is further preferred that the total concentration of organic solvent in composition A is 98% by weight or less, more preferably 95% by weight or less, and even more preferably 92% by weight or less, calculated based on the total weight of composition A.

[0082] To achieve the above-mentioned effect, the total concentration of organic solvent in composition A is preferably in the range of 75-98% by weight, more preferably 80-95% by weight, and even more preferably 85-92% by weight, calculated based on the total weight of composition A.

[0083] Therefore, the present invention also relates to a dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that the dyeing product comprises at least composition A and composition B.

[0084] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and

[0085] Composition B is an aqueous composition with a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions;

[0086] The total concentration of the oxidant in composition B is 1% by weight or less, preferably 0.1% by weight or less, and more preferably, composition B contains no oxidant based on the total weight of composition B.

[0087] Wherein, composition A is a liquid composition at 25°C and atmospheric pressure, contains one or more organic solvents, and contains less than 10% by weight of water, preferably less than 1% by weight, more preferably less than 0.1% by weight, calculated based on the total weight of composition A. More preferably, composition A containing one or more organic solvents is anhydrous and liquid at 25°C and atmospheric pressure. Preferably, the total concentration of organic solvents in composition A is in the range of 75-98% by weight, more preferably 80-95% by weight, and even more preferably 85-92% by weight, calculated based on the total weight of composition A.

[0088] In another aspect of the invention, composition A is an aqueous composition.

[0089] From the perspective of composition A achieving cosmetic acceptance, the term "aqueous" means that the composition is mainly water-containing, that is, the water content in the composition is preferably 50% by weight or more, more preferably 60% by weight or more, further preferably 70% by weight or more, and even more preferably 80% by weight or more, calculated based on the total weight of composition A.

[0090] From the perspective of dyeing strength, it is further preferred that the water content in composition A is 98% by weight or less, more preferably 95% by weight or less, and even more preferably 92% by weight or less, calculated based on the total weight of composition A.

[0091] To achieve the above effects, the total water concentration in composition A is preferably in the range of 50-98% by weight, more preferably 60-95% by weight, even more preferably 70-92% by weight, and even more preferably 80-92% by weight, calculated based on the total weight of composition A.

[0092] From the perspective of dyeing performance, it is preferable that the pH value of the aqueous composition A is 7 or higher, more preferably 7.5 or higher, and even more preferably 8 or higher.

[0093] From the perspective of hair damage and dyeing performance, it is preferable that the pH value of the aqueous composition A is below 12, more preferably below 11.5, and even more preferably below 11.

[0094] To achieve the above effects, the pH range of the aqueous composition A is preferably 7 to 12, more preferably 7.5 to 11.5, and even more preferably 8 to 11.

[0095] Composition B

[0096] The dyeing product of the present invention comprises composition B as an aqueous composition having a pH range of 1 to 6, and comprises c) one or more ammonium salts having the following general formula: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions.

[0097] The total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably, composition B does not contain oxidant when calculated based on the total weight of composition B.

[0098] From the perspective of cosmetic acceptability, the pH of composition B is preferably 1.5 or higher, more preferably 2.0 or higher, and even more preferably 2.5 or higher.

[0099] From a stability perspective, the pH of composition B is preferably below 5.5, more preferably below 5.0, and even more preferably below 4.5.

[0100] To achieve the above effects, the pH range of composition B is preferably 1.5 to 5.5, more preferably 2.0 to 5.0, and even more preferably 2.5 to 4.5.

[0101] Composition B comprises one or more ammonium salts according to group c) having the following general formula: NH4 + Y - In the formula, Y - To remove OH - and CO3 2- Other anions.

[0102] Suitable group c) compounds are ammonium sulfate, ammonium chloride, ammonium acetate, ammonium benzoate, ammonium carbamate, ammonium chloride, ferric ammonium pentate, ammonium fluoride, ammonium iodide, ammonium bromide, ammonium lactate, ammonium nitrate, ammonium phosphate, diammonium phosphate, triammonium phosphate, ammonium propionate, ammonium sulfite, ammonium thiocyanate, ammonium xylenesulfonate, ammonium citrate, diammonium citrate, triammonium citrate, and / or mixtures thereof.

[0103] From the perspective of cosmetic acceptability and stability, it is preferred that one or more compounds according to group c) are ammonium sulfate, ammonium chloride, ammonium phosphate, diammonium phosphate, triammonium phosphate, and / or mixtures thereof, and more preferably that one or more compounds according to group c) are ammonium sulfate.

[0104] From the perspective of dyeing intensity, it is preferred that the total concentration of one or more compounds according to group c) in composition B is 0.1% by weight or more, more preferably 0.5% by weight or more, even more preferably 0.75% by weight or more, and even more preferably 1% by weight or more, calculated based on the total weight of composition B.

[0105] From the perspective of odor and cosmetic acceptability, it is preferred that the total concentration of one or more compounds according to group c) in composition B is 15% by weight or less, more preferably 10% by weight or less, further preferably 8% by weight or less, and even more preferably 6% by weight or less, calculated based on the total weight of composition B.

[0106] To achieve the above effects, the total concentration of one or more compounds according to group c) in composition B is preferably 0.1 to 15% by weight, more preferably 0.5 to 10% by weight, even more preferably 0.75 to 8% by weight, and even more preferably 1 to 6% by weight, calculated based on the total weight of composition B.

[0107] From the perspective of user-friendliness and staining strength, it is preferred that composition A and / or composition B contain one or more lipophilic compounds at 25°C and atmospheric pressure as compounds according to group d).

[0108] The compounds according to group d) are preferably selected from C. 12 ~C 22 fatty alcohols, C3-C 22 alcohols and C 12 ~C 22 Fatty acid esters, C8-C 22 Fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon products, and / or mixtures thereof.

[0109] Appropriate C 12 ~C 22 Fatty alcohols are myristol, cetyl alcohol, stearyl alcohol, behenyl alcohol and cetearyl alcohol, and / or mixtures thereof.

[0110] Appropriate C3~C 22 alcohols and C 12 ~C 22 The fatty acid esters are isopropyl myristate, isopropyl palmitate and myristyl myristate, and / or mixtures thereof.

[0111] Appropriate C8~C 22 The fatty acids are oleic acid, linoleic acid and palmitic acid, and / or mixtures thereof.

[0112] Suitable vegetable oils include olive oil, almond oil, sunflower oil, and argan oil, and / or mixtures thereof.

[0113] Suitable silicones are non-amino-modified silicones and / or amino-modified silicones, the latter often referred to as amino-terminated polydimethylsiloxanes.

[0114] From the perspective of composition stability and dyeing strength, it is preferable that the total concentration of one or more compounds according to group d) in composition A and / or composition B is 1% by weight or more, more preferably 2% by weight or more, and even more preferably 3% by weight or more, calculated based on the total weight of each composition A and / or composition B.

[0115] From the perspective of forming a stable composition, it is preferable that the total concentration of one or more compounds according to group d) in composition A and / or composition B is 20% by weight or less, more preferably 15% by weight or less, and even more preferably 12% by weight or less, calculated based on the total weight of each composition A and / or composition B.

[0116] To achieve the above effects, the total concentration of one or more compounds according to group d) in composition A and / or composition B is preferably 1 to 20% by weight, more preferably 2 to 15% by weight, and more preferably 3 to 12% by weight, calculated based on the total weight of each composition A and / or composition B.

[0117] From the perspective of user-friendliness and dyeing strength, composition B is preferably a water-in-oil emulsion containing one or more compounds according to group d).

[0118] From the perspective of product stability, it is preferable to store composition A and composition B separately until they are about to be applied to keratin fibers.

[0119] When composition A and composition B are mixed before being applied to keratin fibers, from the perspective of dyeing intensity, the pH value of the resulting ready-to-use composition is preferably 7 or higher, more preferably 7.5 or higher, and more preferably 8 or higher.

[0120] When composition A is mixed with composition B before being applied to keratin fibers, from the perspective of dyeing strength and cosmetic safety, it is preferable that the pH value of the resulting ready-to-use composition is 12 or less, preferably 11.5 or less, and more preferably 11 or less.

[0121] To achieve the above effects, it is preferable that the pH range of the ready-to-use composition obtained by mixing composition A and composition B is 7 to 12, preferably 7.5 to 11.5, and more preferably 8 to 11.

[0122] From the perspective of reducing damage, it is further preferred that the ready-to-use composition obtained by mixing composition A and composition B contains 1% or less of oxidant, preferably 0.1% or less of oxidant, and more preferably the ready-to-use composition does not contain oxidant, calculated based on the total weight of the ready-to-use composition prepared by mixing composition A and composition B.

[0123] Optional ingredient - surfactant

[0124] Composition A and / or composition B of the present invention further comprise one or more surfactants, preferably selected from nonionic surfactants, anionic surfactants, cationic surfactants, and / or amphoteric surfactants / amphoionic surfactants, and / or mixtures thereof; from the viewpoint of stabilizing the composition and improving mutual miscibility, anionic surfactants are more preferred.

[0125] Preferably, the anionic surfactant may be selected from ethoxylated or nonethoxylated alkyl ether sulfate surfactants, alkyl sulfates, ethoxylated and / or nonethoxylated alkyl carboxylates, ethoxylated or nonethoxylated amino acid surfactants, and / or mixtures thereof, and / or salts thereof.

[0126] Suitable examples are alkyl sulfates or preferably ethoxylated alkyl ether sulfate surfactants, mixtures thereof, and / or salts thereof, having an alkyl chain length of C. 10 ~C 22 The degree of ethoxylation is 1 to 50.

[0127] Suitable nonionic surfactants may be selected from alkyl polysaccharides, ethoxylated triglycerides, ethoxylated fatty alcohols, ethoxylated fatty acid esters, and / or mixtures thereof.

[0128] Suitable cationic surfactants are those with a length range of C 12 ~C 22 A quaternary ammonium salt surfactant with a carbon chain, or having a tertiary amine group and having at least one chain with a length ranging from C1 to C2. 12 ~C 22Carbon-chain surfactants, such as alkylamide alkylamine surfactants and / or their salts. Suitable examples include hexadecyltrimethylammonium chloride and behenyltrimethylammonium chloride.

[0129] Suitable amphoteric / amphoionic surfactants are betaine-type. Preferred compounds are selected from alkyl betaines and / or alkylamide betaines. A preferred alkyl betaine is lauryl betaine, and a preferred alkylamide betaine is cocamidopropyl betaine. The invention also includes salts of the above compounds.

[0130] From the perspective of improving the wettability, physical stability, and miscibility with other components of keratin fibers, the appropriate concentration range of surfactant is 0.1 to 10% by weight, calculated based on the total weight of each composition A and / or composition B.

[0131] Thickening polymer

[0132] From the perspective of cosmetic safety, composition A and / or composition B of the present invention further preferably contain one or more thickening polymers.

[0133] Composition A and / or composition B of the present invention may contain one or more thickening polymers selected from nonionic thickening polymers and / or anionic thickening polymers and / or mixtures thereof.

[0134] Preferably, the thickening polymer is a polymer that can form an aqueous solution and / or an aqueous dispersion under pH 7 to 12 conditions, and has a viscosity of at least 1,000 mPa·s in water at a concentration of 1% by weight at 25°C and atmospheric pressure, calculated based on the total weight of the composition, using a Brookfield viscometer, for example, measured for 1 minute at 10 rpm with a #4 rotor.

[0135] Suitable nonionic thickening polymers are cellulose polymers. Suitable examples of cellulose polymers are methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, and alkylated hydroxycellulose, such as (C2-C8) alkylcellulose or cetyl hydroxyethylcellulose.

[0136] The appropriate anionic thickening polymer is selected from anionic polymers of natural origin and / or synthetic anionic polymers.

[0137] Suitable natural anionic polymers are selected from xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, carboxymethyl cellulose, and starch-based polymers such as plant starch and / or their synthetically modified derivatives, such as hydroxypropyl starch phosphate. Also suitable are alginic acid, sodium alginate, ammonium alginate, calcium alginate, gum arabic, and guar gum.

[0138] Suitable synthetic anionic polymers are associative thickening polymers, such as acrylate / stearyl alcohol polyether-30 methacrylate copolymers.

[0139] From the perspective of its biodegradability and low environmental impact, the preferred thickening polymers for the compositions of the present invention are natural anionic polymers, more preferably xanthan gum and / or dehydroxanthan gum.

[0140] From the perspective of providing sufficient viscosity for composition A and / or composition B, it is preferable that the total concentration of the thickening polymer in composition A and / or composition B of the present invention is 0.1% by weight or more, more preferably 0.25% by weight or more, and even more preferably 0.5% by weight or more, calculated based on the total weight of each composition A and / or composition B.

[0141] From the perspective of providing sufficient viscosity for composition A and / or composition B and product cost, it is preferable that the total concentration of thickening polymer in composition A and / or composition B of the present invention is 15% by weight or less, more preferably 12% by weight or less, and even more preferably 10% by weight or less, calculated based on the total weight of each composition A and / or composition B.

[0142] To achieve the above effects, the total concentration of the thickening polymer in composition A and / or composition B of the present invention is preferably in the range of 0.1 to 15% by weight, more preferably 0.25 to 12% by weight, and even more preferably 0.5 to 10% by weight, calculated based on the total weight of each composition A and / or composition B.

[0143] From a cosmetic safety perspective, the viscosity range of compositions A and / or B of the present invention is preferably 1,000 mPa·s to 25,000 mPa·s, more preferably 2,000 mPa·s to 20,000 mPa·s, and even more preferably 2,500 mPa·s to 17,500 mPa·s. This viscosity was measured using a cone-plate viscometer at 25°C and atmospheric pressure. A suitable viscometer is a Brookfield viscometer using a #4 rotor.

[0144] Staining methods

[0145] The present invention also relates to a dyeing method for keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps:

[0146] i) Provide composition A as defined above;

[0147] ii) Provide composition B as defined above;

[0148] iii) Before applying the mixture to keratin fibers, mix the compositions from steps i) and ii) to obtain a ready-to-use composition with a pH range of 7 to 12;

[0149] iv) Apply the ready-to-use composition to keratin fibers for a period of 1 minute to 60 minutes;

[0150] v) Optionally rinse the keratin fibers.

[0151] From the perspective of accelerating dyeing, the pH range of the ready-to-use composition is preferably 7 to 12, more preferably 7.5 to 11.5, and even more preferably 8 to 11.

[0152] The ready-to-use composition is then applied to the keratin fibers, and the residence time is from 1 minute to 60 minutes, as described in step iv). From the perspective of sufficient staining, the preferred time range for step iv) is 5 minutes to 45 minutes, more preferably 10 minutes to 35 minutes.

[0153] While retaining the ready-to-use composition in keratin fibers, heating may be optionally performed, with a suitable temperature range of 30°C to 50°C.

[0154] Use of the composition

[0155] The present invention also relates to the use of a composition for enhancing the color strength and wash fastness of one or more direct dyes on keratin fibers, preferably human keratin fibers, more preferably human hair, wherein the composition is defined as composition B as described above, wherein the composition B is mixed with composition A as defined above just before being applied to the keratin fibers.

[0156] The disclosure of this invention also relates to <1> A dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that,

[0157] The dyeing product contains at least composition A and composition B.

[0158] Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and

[0159] - Composition B is an aqueous composition with a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula:

[0160] NH4 + Y - ,

[0161] In the formula, Y - To remove OH - and CO3 2- Other anions;

[0162] The total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably, composition B does not contain oxidant when calculated based on the total weight of composition B.

[0163] <2> According to the <1> The product described in the article is characterized in that the total concentration of oxidant in composition A is less than 1% by weight, preferably less than 0.1% by weight, and more preferably composition A does not contain oxidant when calculated based on the total weight of composition A.

[0164] <3> According to the <1> or <2> The product described in the article is characterized in that the dyeing product is a non-oxidative dyeing product.

[0165] <4> According to the <1> ~ <3> The product according to any one of the following descriptions is characterized in that one or more compounds according to group a) are one or more nonionic direct dyes and / or anionic direct dyes, and / or their salts, and / or mixtures thereof; preferably, one or more compounds according to group a) are Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23. Acid Yellow 3, Food Yellow 8, D&C Brown 1, D&C Green 5, D&C Green 8, D&C Orange 4, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2, D&C Yellow 7, D&C Yellow 8, D&C Yellow 10, FD&C Red 2, FD&C Red 40, FD&C Red 4, FD&C Yellow 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9, Disperse Violet 1, Acid Red 52, DC Violet 2, DC Red 33, DC Orange 4, DC Red 27, DC Yellow 10, HC Blue 18, HC Red 18, HC Yellow 16, Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26. Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic Red 51, Basic Yellow 87, HC Blue 17, and Basic Orange 31, preferably Basic Red 51, Basic Yellow 87, Basic Orange 31, HC Blue 17, Basic Blue 124, HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown 2, HC Green HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Red BN, HC Red 1, HC Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 54, HC Red 14, HC Purple BS, HC Purple 1, HC Purple 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Yellow 13, HC Yellow 14, HC Yellow 15, HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or its salts, and / or mixtures thereof.

[0166] <5> According to the <1> ~ <4> The product according to any one of the clauses is characterized in that one or more compounds according to group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or their salts, and / or mixtures thereof.

[0167] <6> According to the <1> ~ <5> The product according to any one of the clauses is characterized in that one or more compounds of group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, and / or their salts, and / or mixtures thereof.

[0168] <7> According to the <1> ~ <6> The product according to any one of the clauses is characterized in that the total concentration of one or more compounds according to group a) in composition A is in the range of 0.05 to 15% by weight, preferably 0.1 to 12% by weight, more preferably 0.25 to 10% by weight, calculated based on the total weight of composition A.

[0169] <8> According to the <1> ~ <7> The product according to any one of the clauses is characterized in that one or more compounds according to group b) are selected from one or more organic alkalizing agents, and / or their salts, and / or ammonium hydroxide.

[0170] <9> According to the <1> ~ <8> The product according to any one of the clauses is characterized in that one or more compounds according to group b) are selected from monoethanolamine, diethanolamine, monoethanol methylamine, monoethanol dimethylamine, diethanol methylamine, monoethanol ethylamine, monoethanol diethylamine, diethanol ethylamine, monoethanol propylamine, monoethanol dipropylamine, diethanol propylamine, monoethanol butylamine, diethanol butylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, ammonium hydroxide, and / or mixtures thereof.

[0171] <10> According to the <1> ~ <9> The product according to any one of the clauses is characterized in that one or more compounds according to group b) are selected from monoethanolamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, ammonium hydroxide, and / or mixtures thereof.

[0172] <11> According to the <1> ~ <10> The product according to any one of the clauses is characterized in that the total concentration of one or more compounds according to group b) in composition A is in the range of 0.1 to 30% by weight, preferably 0.25 to 25% by weight, more preferably 0.5 to 20% by weight, calculated based on the total weight of composition A.

[0173] <12> According to the <1> ~ <11> The product according to any one of the clauses is characterized in that composition A is a powder composition and contains water of 10% by weight or less, preferably 1% by weight or less, more preferably 0.1% by weight or less, and, based on the total weight of composition A, it is still more preferably that composition A is an anhydrous powder composition.

[0174] <13> According to the <12> The product described in the article is characterized in that composition A comprises one or more organic powdered excipients and / or inorganic powdered excipients.

[0175] <14> According to the <12> Article and / or the <13> The product described in the article is characterized in that one or more organic powdered excipients and / or inorganic powdered excipients are diatomaceous earth, kaolin, bentonite, one or more starches such as corn starch, cassava starch, rice starch, wheat starch and potato starch, nylon powder, montmorillonite, gypsum, sawdust and perlite; more preferably, it is corn starch.

[0176] <15> According to the <12> Article to No. <14> The product according to any one of the clauses is characterized in that the total concentration of the powdered excipient in composition A is more preferably 10-98% by weight, more preferably 15-95% by weight, further preferably 20-90% by weight, even more preferably 25-90% by weight, still more preferably 30-90% by weight, and even more preferably 55-90% by weight, calculated based on the total weight of composition A.

[0177] <16> According to the <1> Article to No. <11> The product according to any one of the clauses is characterized in that composition A is a liquid composition at 25°C and atmospheric pressure, contains one or more organic solvents, and contains less than 10% by weight of water, preferably less than 1% by weight, more preferably less than 0.1% by weight, and more preferably, composition A containing one or more organic solvents is anhydrous and liquid at 25°C and atmospheric pressure.

[0178] <17> According to the <16> The product described in Article A is characterized in that one or more organic solvents in composition A are monohydric alcohols, dihydric alcohols and trihydric alcohols, and / or mixtures thereof.

[0179] <18> According to the <16> Article to No. <17> The product described in any one of the clauses is characterized in that one or more organic solvents are ethanol, n-propanol, isopropanol, propylene glycol, ethylene glycol, benzyl alcohol, phenoxyethanol and glycerol, and / or mixtures thereof.

[0180] <19> According to the <16> Article to No. <18> The product according to any one of the clauses is characterized in that the total concentration of organic solvent in composition A is in the range of 75 to 98% by weight, more preferably 80 to 95% by weight, and even more preferably 85 to 92% by weight, calculated based on the total weight of composition A.

[0181] <20> According to the <1> Article to No. <11> The product described in any one of the clauses is characterized in that composition A is an aqueous composition with a pH range of 7 to 12, preferably 7.5 to 11.5, and more preferably 8 to 11.

[0182] <21> According to the <1> Article to No. <11> Article and / or the <20> The product described in the article is characterized in that the composition A contains water of 50% by weight or more, more preferably 60% by weight or more, even more preferably 70% by weight or more, and even more preferably 80% by weight or more, calculated based on the total weight of the composition A.

[0183] <22> According to the <1> Article to No. <21> The product according to any one of the clauses is characterized in that one or more compounds according to group c) are ammonium sulfate, ammonium chloride, ammonium acetate, ammonium benzoate, ammonium carbamate, ammonium chloride, ferric ammonium pentate, ammonium fluoride, ammonium iodide, ammonium bromide, ammonium lactate, ammonium nitrate, ammonium phosphate, diammonium phosphate, triammonium phosphate, ammonium propionate, ammonium sulfite, ammonium thiocyanate, ammonium xylenesulfonate, ammonium citrate, diammonium citrate, triammonium citrate, and / or mixtures thereof.

[0184] <23> According to the <1> Article to No. <22> The product according to any one of the clauses is characterized in that one or more compounds according to group c) are ammonium sulfate, ammonium chloride, ammonium phosphate, diammonium phosphate, triammonium phosphate, and / or mixtures thereof.

[0185] <24> According to the <1> Article to No. <23> The product described in any one of the clauses is characterized in that one or more compounds of group c) are ammonium sulfate.

[0186] <25> According to the <1> Article to No. <24> The product according to any one of the clauses is characterized in that the total concentration of one or more compounds according to group c) in composition B is in the range of 0.1 to 15% by weight, preferably 0.5 to 10% by weight, more preferably 0.75 to 8% by weight, and even more preferably 1 to 6% by weight, calculated based on the total weight of composition B.

[0187] <26> According to the <1> Article to No. <25> The product according to any one of the claims, characterized in that composition B comprises one or more lipophilic compounds at 25°C and atmospheric pressure as compounds according to group d); preferably, compounds according to group d) are selected from group C. 12 ~C 22fatty alcohols, C3-C 22 alcohols and C 12 ~C 22 Fatty acid esters, C8-C 22 Fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon products, and / or mixtures thereof; more preferably, composition B is a water-in-oil emulsion comprising one or more compounds according to group d).

[0188] <27> According to the <1> Article to No. <25> The product according to any one of the clauses is characterized in that the ready-to-use composition obtained by mixing composition A with composition B has a pH range of 7 to 12, preferably 7.5 to 11.5, and more preferably 8 to 11.

[0189] This disclosure also involves <28> An aqueous composition C for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, wherein the aqueous composition C has a pH range of 1 to 6 and contains a first... <1> Article to No. <27> The total concentration of one or more ammonium salts as defined in any of the clauses (c) is 0.5% by weight or more, more preferably 0.75% by weight or more, and even more preferably 1% by weight or more, based on the total weight of composition C; and

[0190] Composition C contains less than 1% by weight of an oxidant, preferably less than 0.1% by weight of an oxidant, and more preferably, composition C does not contain an oxidant based on the total weight of composition C.

[0191] This disclosure also involves <29> A method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps:

[0192] i) Provide the <1> Article to No. <27> Composition A as defined in any of the clauses;

[0193] ii) Provide according to the <1> Article to No. <27> Composition B or the first as defined in any of the clauses <28> Composition C as defined in Article 10;

[0194] iii) Before applying the mixture to keratin fibers, mix the compositions described in steps i) and ii) to obtain a ready-to-use composition with a pH range of 7 to 12;

[0195] iv) Apply the ready-to-use composition to keratin fibers for a period of 1 to 60 minutes;

[0196] v) Optionally, the keratin fibers can be rinsed.

[0197] This disclosure also involves <30> The use of a composition for enhancing the color strength and wash fastness of one or more direct dyes on keratin fibers, preferably human keratin fibers, more preferably human hair, wherein the composition is defined as the first <1> Article to No. <27> Composition B or the first as defined in any of the clauses <28> Composition C as defined in Clause 1, wherein the condition is that, prior to application to keratin fibers, composition B or composition C is combined with the first... <1> Article to No. <27> Mix the composition A as defined in any of the clauses.

[0198] The following examples are used to illustrate the present invention, but should not be regarded as limiting it.

[0199] Example

[0200] Table 1

[0201]

[0202] Table 2

[0203]

[0204] The compositions of the present invention exhibit superior dyeing strength and wash fastness compared to the comparative example of composition B which does not contain ammonium salts.

[0205] Table 3

[0206]

[0207] Table 4

[0208] result This invention 6 Comparative Example 4 Color after staining (ΔE) 68.14 66.04 The color (ΔE) after 20 washes 62.07 57.74 Color loss (ΔΔE) 6.07 8.30

[0209] method

[0210] hair dye

[0211] Goat hair bundles (21cm, 2g per bundle) were ironed for 20 minutes using a commercial perm product under the brand name Goldwell Topform Type 1, rinsed, and then treated with an oxidizing composition for 10 minutes to set the ironing effect. The hair bundles were then shampooed and dried.

[0212] The above-mentioned dyeing product was prepared by mixing composition A and composition B in a weight ratio of 1:1, thereby preparing a ready-to-use composition with a pH range of 10.0 to 10.5.

[0213] Apply 2g of the ready-to-use composition to the ironed goat hair bundles and incubate at 30°C for 30 minutes. Rinse and dry the hair bundles. Color data were measured using a colorimeter (Datacolor Mercury Check II Plus) in the CIE colorimetric system (L*, a*, b*). The color difference (ΔE) was calculated according to the following formula.

[0214]

[0215] ΔΔE represents the color difference between newly dyed hair and hair after 20 washes, as described below.

[0216] Wash fastness

[0217] Apply 1g of commercial shampoo, Goldwell Dualsenses Color Fade Stop Shampoo, to the dyed hair follicles and lather with warm water for 30 seconds. Then rinse the hair follicles. Repeat the above steps 20 times. After treatment, blow-dry the hair follicles and measure their remaining color (L*, a*, b*). The color difference between the hair after 20 washes and the newly dyed hair is calculated as ΔΔE.

Claims

1. A dyeing product for keratin fibers, preferably human keratin fibers, more preferably human hair, characterized in that, The dyeing product comprises at least composition A and composition B. Composition A comprises: a) one or more hair direct dyes, and b) one or more alkalizing agents; and - Composition B is an aqueous composition having a pH range of 1 to 6, and contains c) one or more ammonium salts having the following general formula: NH4 + Y - , In the formula, Y - To remove OH - and CO3 2- Other anions; The total concentration of oxidant in composition B is less than 1% by weight, preferably less than 0.1% by weight, and more preferably, composition B does not contain oxidant, calculated based on the total weight of composition B.

2. The product according to claim 1, characterized in that, The total concentration of oxidant in composition A is less than 1% by weight, preferably less than 0.1% by weight. More preferably, composition A does not contain oxidant, and even more preferably, the dyeing product is a non-oxidizing dyeing product.

3. The product according to claim 1 and / or 2, characterized in that, One or more compounds according to group a) are one or more nonionic direct dyes and / or anionic direct dyes, and / or their salts, and / or mixtures thereof; preferably, one or more compounds according to group a) are Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow No. 8, D&C Brown 1, D&C Green 5, D&C Green 8, D&C Orange 4, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2, D&C Yellow 7, D&C Yellow 8, D&C Yellow 10, FD&C Red 2, FD&C Red 40, FD&C Red 4, FD&C Yellow 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9, Disperse Violet 1, Acid Red 52, DC Violet 2, DC Red 33, DC Orange 4, DC Red 27, DC Yellow 10, HC Blue 18, HC Red 18, HC Yellow 16, Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 9 ... The following compounds are preferred: Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic Red 51, Basic Yellow 87, HC Blue 17, and Basic Orange 31, preferably one or more compounds according to group a) are Basic Red 51, Basic Yellow 87, Basic Orange 31, HC Blue 17, and Basic Blue 124, HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown 2, and HC Green. HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Red BN, HC Red 1, HC Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 54, HC Red 14, HC Purple BS, HC Purple 1, HC Purple 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Yellow 13, HC Yellow 14, HC Yellow 15, HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or its salts, and / or mixtures thereof;More preferably, one or more compounds according to group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, and / or their salts, and / or mixtures thereof; even more preferably, one or more compounds according to group a) are selected from HC Blue 18, HC Red 18, HC Yellow 16, and / or their salts, and / or mixtures thereof.

4. The product according to any one of the preceding claims, characterized in that, The total concentration of one or more compounds according to group a) in composition A ranges from 0.05 to 15% by weight, preferably from 0.1 to 12% by weight, more preferably from 0.25 to 10% by weight, calculated based on the total weight of composition A.

5. The product according to any one of the preceding claims, characterized in that, One or more compounds according to group b) are selected from one or more organic alkalizing agents and / or their salts and / or ammonium hydroxide; preferably, one or more compounds according to group b) are one or more alkanolamines and / or their salts and / or ammonium hydroxide; more preferably, one or more compounds according to group b) are selected from monoethanolamine, diethanolamine, monoethanol methylamine, monoethanol dimethylamine, diethanol methylamine, monoethanol ethylamine, monoethanol diethylamine, diethanol ethylamine, monoethanol propylamine, monoethanol dipropylamine, diethanol propylamine, monoethanol butylamine, diethanol butylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, ammonium hydroxide, and / or mixtures thereof; most preferably, one or more compounds according to group b) are selected from monoethanolamine, 2-amino-2-methylpropanol, tris(hydroxymethyl)aminomethane, ammonium hydroxide, and / or mixtures thereof.

6. The product according to any one of the preceding claims, characterized in that, The total concentration of one or more compounds according to group b) in composition A ranges from 0.1 to 30% by weight, preferably from 0.25 to 25% by weight, more preferably from 0.5 to 20% by weight, calculated based on the total weight of composition A.

7. The product according to any one of the preceding claims, characterized in that, Composition A is a powder composition and contains water of 10% by weight or less, preferably 1% by weight or less, more preferably 0.1% by weight or less, and more preferably an anhydrous powder composition based on the total weight of composition A.

8. The product according to any one of claims 1 to 6, characterized in that, Composition A is a liquid composition at 25°C and atmospheric pressure, contains one or more organic solvents and contains less than 10% by weight of water, preferably less than 1% by weight, more preferably less than 0.1% by weight, and is anhydrous and liquid at 25°C and atmospheric pressure based on the total weight of composition A. More preferably, composition A containing one or more organic solvents is anhydrous and liquid based on the total weight of composition A.

9. The product according to any one of claims 1 to 6, characterized in that, Composition A is an aqueous composition with a pH range of 7 to 12, preferably 7.5 to 11.5, and more preferably 8 to 11.

10. The product according to any one of the preceding claims, characterized in that, One or more compounds according to group c) are ammonium sulfate, ammonium chloride, ammonium acetate, ammonium benzoate, ammonium carbamate, ammonium chloride, ferric ammonium pentate, ammonium fluoride, ammonium iodide, ammonium bromide, ammonium lactate, ammonium nitrate, ammonium phosphate, diammonium phosphate, triammonium phosphate, ammonium propionate, ammonium sulfite, ammonium thiocyanate, ammonium xylenesulfonate, ammonium citrate, diammonium citrate, triammonium citrate, and / or mixtures thereof; preferably, one or more compounds according to group c) are ammonium sulfate, ammonium chloride, ammonium phosphate, diammonium phosphate, triammonium phosphate, and / or mixtures thereof; more preferably, one or more compounds according to group c) are ammonium sulfate.

11. The product according to any one of the preceding claims, characterized in that, The total concentration of one or more compounds according to group c) in composition B ranges from 0.1 to 15% by weight, preferably from 0.5 to 10% by weight, more preferably from 0.75 to 8% by weight, and even more preferably from 1 to 6% by weight, calculated based on the total weight of composition B.

12. The product according to any one of the preceding claims, characterized in that, The ready-to-use composition obtained by mixing composition A with composition B has a pH range of 7 to 12, preferably 7.5 to 11.5, and more preferably 8 to 11.

13. The product according to any one of the preceding claims, characterized in that, The weight mixing ratio of composition A to composition B ranges from 0.1 to 10, preferably from 0.2 to 5, more preferably from 0.3 to 3, and even more preferably from 1.

14. A dyeing method for keratin fibers, preferably human keratin fibers, more preferably human hair, wherein, The method includes the following steps: i) Provide composition A as defined in any one of claims 1 to 13; ii) Provide composition B as defined in any one of claims 1 to 13; iii) Before applying the mixture to keratin fibers, mix the compositions described in steps i) and ii) to obtain a ready-to-use composition with a pH range of 7 to 12; iv) Apply the ready-to-use composition to keratin fibers for a period of 1 minute to 60 minutes; v) Optionally, the keratin fibers are rinsed.

15. Use of a composition for enhancing the color strength and wash fastness of one or more direct dyes on keratin fibers, preferably human keratin fibers, more preferably human hair, wherein, The composition is defined as composition B according to any one of claims 1 to 13. The conditions are: Before applying the composition B to the keratin fibers, the composition B is mixed with the composition A according to any one of claims 1 to 13.

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