Human hair melanin hair dye as well as preparation method and use method thereof

Abstract

The invention discloses a human hair melanin hair dye as well as a preparation method and a use method thereof. The hair dye comprises an agent A, an agent B and an agent C, the agent A comprises 1-5% of a scale opening agent, 0.1-5% of a pH regulator and 90-98.9% of water; the agent B is prepared from 0.1 to 1 percent of human hair melanin, 0.1 to 5 percent of pH (Potential of Hydrogen) regulator and 94 to 99.8 percent of water; the agent C is prepared from 0.1 to 1 percent of mordant, 0.1 to 2 percent of ionic surfactant, 0.1 to 5 percent of pH (Potential of Hydrogen) regulator and 92 to 97.9 percent of water. The invention provides a method for preparing a safe and effective natural hair dye from human hair melanin, a temporary hair dye and a permanent hair dye are obtained by combining different reagents, and the temporary hair dye can provide effective dyeing on the premise of not losing hair; the permanent hair dye can provide better color fastness, does not contain aniline substances, and is treated by using a color fixing agent.

Description

Technical Field

[0001] The invention belongs to the technical field of hair dye preparation, and particularly relates to a human hair melanin hair dye and a preparation method and a use method thereof. Background Art

[0002] In recent years, people's demand for hair dyes has continued to increase, leading to rapid development of hair dyes worldwide; currently, the main hair dyes on the market are mainly chemically synthesized dyes, and the main ingredients are permanent oxidative hair dyes. According to published research, the main ingredients of oxidative hair dyes are generally aniline ingredients, as well as hydrogen peroxide, ammonia, etc. These chemicals have adverse effects on human health, so hair dyes with natural pigment sources have attracted much attention.

[0003] Hair is mainly composed of the epidermis, cortex and medulla. The normal hair epidermis has a scale layer structure, which has a protective effect on the hair. At present, common black hair dyes can be divided into oxidative hair dyes and plant dyes according to the different dyes. The dyeing method of oxidative hair dyes is to use small molecular organic matter (aniline) to penetrate into the hair, which can dye the hair without damaging the hair, but its molecules are small and can pass through the skin barrier, thereby causing allergies and posing a threat to human health; while plant hair dyes pre-treat the hair under alkaline conditions, causing the hair keratin to swell and the hair scales to open, so that the dye enters the hair, and then polymerizes the dye and closes the hair scales, so that the dye is dyed, but there are problems such as difficulty in coloring, poor color uniformity and poor color fastness. Therefore, it is urgent to provide a natural, non-toxic hair dye with good hair dyeing effect. Summary of the invention

[0004] To overcome the deficiencies of the prior art, the present invention provides a method for preparing and using human hair melanin.

[0005] The present invention first provides a human hair melanin hair dye, comprising an agent A, an agent B and an agent C, wherein the agent A comprises 1-5% of a scale opener, 0.1-5% of a pH adjuster and 90-98.9% of water; the agent B comprises 0.1-1% of a human hair melanin dye, 0.1-5% of a pH adjuster and 94-99.8% of water; and the agent C comprises 0.1-1% of a mordant, 0.1-2% of an ionic surfactant, 0.1-5% of a pH adjuster and 92-97.9% of water.

[0006] Furthermore, in agent A, the scale-opening agent is selected from one or more of L-cysteine, sodium thiosulfate, potassium bisulfate, and sodium sulfite.

[0007] Furthermore, in agent B, the human hair melanin dye is extracted by referring to the method disclosed in Chinese patent CN 118407265 A. The specific method is: first wash the human hair, dissolve it with sodium hydroxide solution under high temperature conditions, then adjust the pH to 10-12 and add alkaline protease for treatment, and finally acidify it with hydrochloric acid to obtain solid particles, filter, wash, and freeze-dry to obtain the human hair melanin dye.

[0008] Furthermore, the human hair melanin is pretreated before use, and the pretreatment method is to fully grind the human hair melanin dye, dissolve it in 1-4 mol / L sodium hydroxide solution, and ultrasonicate it at 50-80° C. for 10-30 minutes.

[0009] Furthermore, in agent C, the mordant is FeSO4·7H2O, FeCl 3、 The ionic surfactant is one or more of cetyltrimethylammonium bromide, octadecyldimethylbenzylammonium chloride and dodecyltrimethylammonium bromide.

[0010] Furthermore, the pH adjuster used in Agent A, Agent B and Agent C is one or more of acetic acid, sodium hydroxide, sodium bicarbonate, sodium carbonate, sodium dihydrogen phosphate and sodium acetate.

[0011] Furthermore, the present invention also provides a temporary hair dye, which comprises the above-mentioned agent B and agent C, wherein the pH of agent B is 4-5, and the pH of agent C is 3-4.

[0012] Furthermore, the present invention also provides a permanent hair dye, which comprises the above-mentioned agent A, agent B and agent C, wherein the pH of agent A is 9-10, the pH of agent B is 8-9, and the pH of agent C is 3-4.

[0013] The present invention further provides a method for using the temporary hair dye, comprising the following steps: first immersing the hair to be dyed into agent C, and then treating it at 30-50°C for 10-30 minutes; then washing the treated hair and air-drying it, then adding the hair to be dyed into agent B and immersing it at 30-50°C for 10-30 minutes; finally taking out the dyed hair and performing a color fixing treatment using a 5% dimethyldiallylammonium chloride solution.

[0014] The present invention further provides a method for using the above-mentioned permanent hair dye, comprising the following steps: firstly immersing the hair to be dyed into agent A, maintaining the treatment at 30-50°C for 10-30 minutes, taking out the treated hair, washing it and air-drying it; then immersing the treated hair into agent B, maintaining the treatment at 30-50°C for 10-30 minutes; then taking out the soaked hair and placing it in agent C, maintaining the treatment at 30-50°C for 10-30 minutes, and finally taking out the dyed hair and performing a color fixing treatment with a 5% dimethyldiallylammonium chloride solution.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects: (1) Dyes are derived from melanin in human hair and are natural and non-toxic compared to synthetic dyes; (2) In the hair dye provided by the present invention, the amount of mordant and human hair melanin dye added is small, and the dyeing effect is close to that of commercially available oxidative hair dyes, which has higher safety.

[0016] (3) Temporary hair dyes will not damage the hair scales during the processing process and can better maintain the strength of the hair. The dye after dyeing is adsorbed on the surface of the hair, which can give the hair a strong black effect. In addition, temporary hair dyes can effectively protect the hair from damage under acidic pH conditions.

[0017] (4) After being treated with Agent A, permanent hair dye can effectively open the hair scales, allowing melanin to enter the hair surface. The melanin is aggregated and fixed in the hair through the metal mordant. The strength of the dyed hair is consistent with that of commercially available hair dyes, and has good color fastness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Human hair before dyeing, human hair dyed with temporary hair dye, human hair dyed with permanent hair dye; a is before dyeing, b is the result of temporary hair dyeing, c is the result of permanent hair dyeing, d is the result after shampooing after temporary hair dyeing, e is the result after shampooing after dyeing with permanent hair dye, and f is the dyeing effect of commercially available hair dye. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention in any way.

[0020] The human hair melanin dye is prepared according to Chinese patent CN 118407265 A. The specific preparation method is as follows: weigh a certain amount of broken hair, use 70% anhydrous ethanol, heat at 80°C for 4 h to degrease, add a certain concentration of sodium hydroxide solution after degreasing and washing, heat for a period of time to dissolve, extract and filter under a 1200-mesh filter cloth; take the filtered liquid, add acetic acid solution, adjust the pH of the solution to 10, add an appropriate amount of alkaline protease after mixing, heat at 50°C for 4 h, add acetic acid solution, adjust the pH of the solution to 7, add 2 mol / L hydrochloric acid again to adjust the pH to a suitable condition, stand and wait for 4 h, filter again, filter under a 1200-mesh filter cloth, take the filter residue, obtain melanin particles, repeat the above steps for three times, wash with pure water to neutrality and then dry to obtain melanin particles with higher purity. Example 1

[0021] A melanin hair dye, a temporary hair dye preparation step is as follows: (1) This hair dye includes two formulations: formulation C: calculated by weight percentage of 100%, 0.4% ferric chloride, 1% hexadecyltrimethylammonium bromide, a certain weight of acetic acid to adjust the pH to 4, and the rest being deionized water, and mixed evenly.

[0022] (2) Agent B: Calculated based on the mass percentage of 100%, add 0.4% human hair melanin, add a certain amount of acetic acid to adjust the pH to 5, and the rest are deionized water, and mix well.

[0023] (3) How to use human melanin temporary hair dye: first soak the normal white hair to be dyed into Agent I, and then treat it at 50°C for 30 minutes; then wash the treated hair and air-dry it, then add the hair to be dyed into Agent B and soak it at 50°C for 30 minutes; finally, take out the dyed hair and use 5% dimethyldiallylammonium chloride solution for color fixing. Example 2

[0024] A melanin hair dye, a temporary hair dye preparation step is as follows: (1) This hair dye includes two formulations: formulation C: calculated by weight percentage of 100%, 0.2% ferric chloride, 0.5% hexadecyltrimethylammonium bromide, a certain amount of acetic acid to adjust the pH to 4, and the rest being deionized water, and mixed evenly.

[0025] (2) Agent B: Calculated based on the mass percentage of 100%, add 0.4% human hair melanin, add a certain amount of acetic acid to adjust the pH to 5, and the rest are deionized water, and mix well.

[0026] (3) How to use human melanin temporary hair dye: first soak the normal white hair to be dyed in agent C, and then treat it at 50°C for 30 minutes; then wash the treated hair and air-dry it, then add the hair to be dyed into agent B and soak it at 50°C for 30 minutes; finally, take out the dyed hair and use 5% dimethyldiallylammonium chloride solution for color fixing. Example 3

[0027] A melanin hair dye, a permanent hair dye preparation step is as follows: (1) This hair dye includes three formulations: formulation A: calculated as 100% by mass, 5% L-cysteine ​​and 1% sodium sulfite are added in sequence, acetic acid is used to adjust the pH to 9, and the rest is deionized water, and mixed evenly.

[0028] (2) Agent B: Calculated based on the mass percentage of 100%, add 0.4% human hair melanin, add a certain amount of acetic acid to adjust the pH to 9, and the rest are deionized water, and mix well.

[0029] (3) Agent C: Calculated as 100% by mass, add 0.4% ferric chloride, 1% hexadecyltrimethylammonium bromide, a certain amount of acetic acid to adjust the pH to 4, and the rest is deionized water, and mix well.

[0030] (4) Steps for using permanent hair dye: First, soak the normal white hair to be dyed in Agent A and keep it at 50°C for 30 minutes. Take out the treated hair, wash it and air-dry it. Then soak the treated hair in Agent B and keep it at 50°C for 30 minutes. Finally, take out the soaked hair and keep it at 50°C for 30 minutes. Take out the treated hair, wash it and air-dry it, and use 5% dimethyldiallylammonium chloride solution for color fixing. Example 4

[0031] A melanin hair dye, a permanent hair dye preparation step is as follows: (1) This hair dye includes three formulations: formulation A: calculated as 100% by mass, 5% L-cysteine ​​and 1% sodium sulfite are added in sequence, acetic acid is used to adjust the pH to 9.5, and the rest is deionized water, and mixed evenly.

[0032] (2) Agent B: Calculated based on the mass percentage of 100%, add 0.4% human hair melanin, add a certain amount of acetic acid to adjust the pH to 9, and the rest are deionized water, and mix well.

[0033] (3) Agent C: Calculated as 100% by mass, add 0.4% ferrous chloride, 1.25% hexadecyltrimethylammonium bromide, a certain amount of acetic acid to adjust the pH to 4, and the rest is deionized water, and mix well.

[0034] (4) The steps for using permanent hair dye are as follows: first, soak the normal white hair to be dyed in Agent A and keep it at 50°C for 30 minutes. After that, take out the treated hair, wash it and air-dry it. Then, soak the treated hair in Agent B and keep it at 50°C for 30 minutes. Finally, take out the soaked hair and keep it at 50°C for 30 minutes. After that, take out the treated hair, wash it and air-dry it. Use 5% dimethyldiallylammonium chloride solution for color fixing.

[0035] Comparative Example 1 The steps for dyeing hair with commercially available hair dye are as follows: Take an equal amount of normal white hair, wash it with shampoo, mix the two types of commercially available hair dye Schwarzkopf black hair dye A and B, and apply them evenly on the hair. After 40 minutes, wash with clean water to remove the floating color.

[0036] Comparative Example 2 The dye in this comparative example is peony root bark polyphenol (Changzhou Meisheng) plant dye. The preparation method of the hair dye is as follows: (1) This hair dye includes three formulations: formulation A: calculated as 100% by mass, 5% L-cysteine ​​and 1% sodium sulfite are added in sequence, acetic acid is used to adjust the pH to 9.5, and the rest is deionized water, and mixed evenly.

[0037] (2) Agent B: Calculated as 100% by mass, add 5% peony root bark polyphenols, add a certain amount of acetic acid to adjust the pH to 9, and the rest are deionized water, and mix well.

[0038] (3) Agent C: Calculated as 100% by mass, add 4% ferrous chloride and a certain amount of acetic acid to adjust the pH to 9, and the rest are deionized water, and mix well.

[0039] (4) Usage steps: first soak the normal white hair to be dyed into agent A and keep it at 50°C for 30 minutes. Take out the treated hair, wash it and air-dry it; then soak the treated hair into agent B and keep it at 50°C for 30 minutes; finally take out the soaked hair and keep it at 50°C for 30 minutes. Take out the treated hair, wash it and air-dry it, and use 5% dimethyldiallylammonium chloride solution for color fixing treatment.

[0040] Hair dye reviews (1) Color value of human hair after dyeing The hair dyeing results of Examples 1-4 and Comparative Examples 1-2 were taken, and the apparent color depth of the dyed hair was measured using a colorimeter. The K / S value and L* value were used to characterize the color depth after dyeing. The results are shown in Table 1.

[0041] (2) Color fastness test The hair dyeing results of Examples 1-4 and Comparative Examples 1-2 were taken. After washing with clean water and the same shampoo, the apparent color depth of the dyed hair was measured using a colorimeter. The K / S value and L* value were used to characterize the color depth after dyeing. The results are shown in Table 1.

[0042] (3) Tensile strength test The hair dyeing results of Examples 1-4 and Comparative Examples 1-2 were taken. After washing with clean water and the same shampoo, the tensile strength of the dyed hair was measured using a YG(B)008E electronic single fiber strength tester. The strength was expressed in cN / dTex. Normal white hair and bleached hair treated with Schwarzkopf bleaching powder were used as controls. The results are shown in Table 1.

[0043] Table 1 Hair dyeing results evaluation results

[0044] The K / S value in Table 1 represents the color depth, and the dyeing result is black. The smaller the L*, the darker the color, which can also better represent the color parameters. From the results in Table 1, it can be seen that the temporary hair dye of the present invention is resistant to washing with water, but not resistant to washing with shampoo. However, the temporary hair dye has no effect on the tensile strength of the hair; the permanent hair dye of the present invention is resistant to washing with water and shampoo, but has a certain damage to the tensile strength, which is equivalent to the tensile strength of white hair after bleaching.

[0045] Compared with Comparative Example 1, the effect of the temporary hair dye after dyeing is close to that of the commercially available hair dye, and the tensile strength is consistent, but the color fastness after shampooing is poor; compared with Comparative Example 2, the permanent hair dye has a smaller dyeing effect L* and a darker dyeing effect, indicating that the hair dye provided by the present invention can achieve a better black coloring effect under the condition of adding a small amount of melanin dye.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A human hair melanin hair dye, characterized in that: It comprises agent B and agent C; the agent B comprises 0.1-1% human hair melanin dye, 0.1-5% pH adjuster and 94-99.8% water; the agent C comprises 0.1-1% mordant, 0.1-2% ionic surfactant, 0.1-5% pH adjuster and 92-97.9% water.

2. The human hair melanin hair dye according to claim 1, characterized in that The human hair melanin dye is prepared by the following method: washing human hair, dissolving it with sodium hydroxide solution under high temperature conditions, adjusting the pH to 10-12, adding alkaline protease for treatment, and finally acidifying with hydrochloric acid to obtain solid particles, filtering, washing, and freeze-drying to obtain the human hair melanin dye.

3. The human hair melanin hair dye according to claim 1, characterized in that The human hair melanin dye is used after being pretreated. The pretreatment method is to fully grind the human hair melanin dye, dissolve it in a 1-4 mol / L sodium hydroxide solution, and perform ultrasonic treatment at 50-80° C. for 10-30 minutes.

4. The human hair melanin hair dye according to claim 1, characterized in that The mordant is FeSO4·7H2O, FeCl 3、 and / or, the ionic surfactant is one or more of hexadecyltrimethylammonium bromide, octadecyldimethylbenzylammonium chloride and dodecyltrimethylammonium bromide.

5. The human hair melanin hair dye according to claim 1, characterized in that The pH regulator is one or more of acetic acid, sodium hydroxide, sodium bicarbonate, sodium carbonate, sodium dihydrogen phosphate and sodium acetate.

6. A temporary hair dye, characterized in that: It is composed of the agent B and the agent C according to any one of claims 1 to 5, wherein the pH of the agent B is 4-5, and the pH of the agent C is 3-4.

7. A permanent hair dye, characterized in that: It is composed of agent A and agent B and agent C according to any one of claims 1 to 5, wherein agent A comprises 1-5% of a scale opener, 0.1-5% of a pH adjuster and 90-98.9% of water; the pH of agent A is 9-10, the pH of agent B is 8-9, and the pH of agent C is 3-4.

8. The permanent hair dye according to claim 7, characterized in that The scale opening agent is selected from one or more of L-cysteine, sodium thiosulfate, potassium hydrogen sulfate, and sodium sulfite.

9. The method for using the temporary hair dye according to claim 6, characterized in that: The steps include: (1) Soak the hair in Agent C, keep the temperature at 30-50°C, dye the hair for 10-30 minutes, take out the soaked hair, wash it and air-dry it; (2) Soak the hair in Agent B again, keep the temperature at 30-50°C, dye the hair for 10-30 minutes, take out the soaked hair, wash it and air-dry it; (3) Use 5% dimethyldiallyl ammonium chloride solution or 1% chitosan solution for color fixation.

10. The method for using the permanent hair dye according to claim 7 or 8, characterized in that: The steps include: (1) Soak the hair in Agent A, keep the temperature at 30-50°C, dye the hair for 5-10 minutes, take out the soaked hair, wash it and air-dry it; (2) Soak the hair in agent B, keep the temperature at 30-50°C, and dye the hair for 10-30 minutes; (3) Soak the hair in Agent C again, keep the temperature at 30-50°C, dye the hair for 10-30 minutes, take out the soaked hair, wash it and air-dry it; (4) Use 5% dimethyldiallyl ammonium chloride solution or 1% chitosan solution for color fixation.

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