Single-dose photosynthetic hair dye

Abstract

The present invention relates to a stable single-dose photosynthetic hair dye. The single-dose photosynthetic hair dye of the present invention contains acetylmethionine silver, arginine and lysine. When the mass ratio of acetylmethionine silver to arginine and lysine is 4:0.1-2:0.1-2, acetylmethionine silver can be completely dissolved in water and is transparent, and will not react and turn black even under light conditions, but when applied to white hair and exposed to the sun, it will quickly turn black to dye the white hair.

Description

Technical Field

[0001] The invention relates to a single-dose photosynthetic hair dye, belonging to the technical field of new materials. Background Art

[0002] Modern people have too much pressure in life or work, coupled with the fast-paced modern life, more and more people have premature gray hair, looking much older than their actual age. In order to maintain their image, hair dyeing has become the choice of most people, which is convenient, fast and effective.

[0003] Silver ions combine with the disulfide bonds of hair fibers, and under light conditions, they are reduced to produce metallic silver particles that are tightly adsorbed on the surface of hair to color the hair. Silver ions can be made into different forms such as creams and gels. When applied to the hair and exposed to sunlight, they can be easily dyed and can maintain the dyed state for 2-3 months. The hair dyes on the market have complex ingredients and contain toxic substances such as phenylenediamine and resorcinol. Once they enter the human body through the scalp, they will cause a variety of diseases.

[0004] Since silver ions need silver salts to be dissolved in an aqueous solution to be produced, silver salts that are easily soluble in water include silver nitrate. When silver nitrate solution is used alone to dye hair, it will turn the hair reddish, and it needs to be used in combination with sodium sulfide to dye it into a natural black color. However, when used, elemental sulfur will also precipitate and adhere to the hair, producing a sulfur odor, and the problem of the sulfur odor cannot be removed after repeated washing. In addition, since silver nitrate is not allowed to be used in cosmetics, the silver salts that can be used in cosmetics include silver sulfate, silver citrate, silver oxide, silver lactate, acetylmethionine silver, etc. These silver salts are difficult to dissolve or insoluble in water, so it is impossible to produce a certain concentration of silver ions in the solution. In addition, since silver salts are reduced by light and discolor, the hair dyeing property is reduced. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a stable single-component photosynthetic hair dye.

[0006] A single-dose photosynthetic hair dye, characterized in that the hair dye contains acetylmethionine silver, arginine and lysine.

[0007] Furthermore, the mass ratio of acetylmethionine silver, arginine and lysine in the single-dose photosynthetic hair dye is 4:0.1-2:0.1-2.

[0008] Furthermore, the mass percentage of acetylmethionine silver in the single-dose photosynthetic hair dye is 1-8%.

[0009] Furthermore, the single-dose photosynthetic hair dye is in the form of any one of a paste, a cream, and a gel.

[0010] Furthermore, the single-dose photosynthetic hair dye also contains a polymer thickener, a wetting agent, a conditioning agent, and the like.

[0011] Furthermore, in the single-dose photosynthetic hair dye, the polymer thickener may be a nonionic thickener or an ionic polymer thickener. The thickener may be cetearyl alcohol, polyvinyl alcohol, polyvinyl pyrrolidone, vinyl alcohol / vinyl amine copolymer, hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, etc. Preferably, one or more of cetearyl alcohol, polyvinyl pyrrolidone, and hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer are used.

[0012] Furthermore, in the single-dose photosynthetic hair dye, the wetting agent is a nonionic surfactant, which can be polyoxyethylene alkyl ether, sucrose fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ether, polyoxyethylene sorbitan fatty acid ester, etc., among which one or more of polyoxyethylene hydrogenated castor oil and polyoxyethylene alkyl ether are preferred.

[0013] Furthermore, in the single-dose photosynthetic hair dye, the conditioning agent may be polyether-modified silicone, alkoxy-modified silicone, amino-modified silicone oil, fatty acid-modified silicone, squalene, squalane, liquid alkane, castor oil, cocoa butter, jojoba oil, avocado oil, olive oil, etc., preferably one or more of polyether-modified silicone, amino-modified silicone, squalane, jojoba oil, and olive oil.

[0014] Furthermore, in addition to the above-mentioned ingredients, the single-dose photosynthetic hair dye may also be added with ingredients used in hair dyes, such as stabilizers, buffers, pigments, fragrances, preservatives, etc., according to actual needs.

[0015] The single-component photosynthetic hair dye of the present invention only needs to be used after shampooing and drying, and can dye hair under sunlight conditions, and the obtained hair color is natural black, does not need to be used with other ingredients, and does not produce unpleasant odors. The single-component photosynthetic hair dye of the present invention can be stored in a packaging bottle for a long time and stably, the dyed hair is resistant to washing and does not fade, and the hair dye of the present invention can be used every once in a while to dye the newly grown hair into natural black. DETAILED DESCRIPTION

[0016] The single-dose photosynthetic hair dye of the present invention contains acetylmethionine silver, arginine and lysine.

[0017] Silver acetylmethionine is dispersed in water and is difficult to dissolve in water to present a transparent solution. By compounding arginine and lysine in a certain proportion, silver acetylmethionine can be completely dissolved in water in a certain proportion and present a transparent state. Other silver salts, such as silver lactate, silver sulfate, silver citrate, silver oxide, etc., do not have the characteristics of silver acetylmethionine compounded with arginine and lysine to dissolve in water in a transparent state.

[0018] The inventors of the present invention have found that when the mass ratio of acetylmethionine silver to arginine and lysine is 4:0.1-2:0.1-2, acetylmethionine silver is completely dissolved in water and is transparent, and will not react to turn black even under light conditions, but when applied to white hair and exposed to the sun, it will quickly turn black to color the white hair. Using arginine or lysine alone can completely dissolve acetylmethionine silver, but partial reaction will occur under light to cause black substances to precipitate from the solution, affecting stability. When excessive arginine and lysine are used, when the mass ratio of acetylmethionine silver to arginine and lysine exceeds 4:2:2, the hair dyeing effect will decrease. When the mass ratio of acetylmethionine silver in the solution is 1-8%, the hair dyeing effect is more obvious, and the solubility of acetylmethionine silver in water does not exceed 8%. The mass concentration of acetylmethionine silver is preferably 1-8%, further preferably 2-8%, and most preferably 4-8%. The higher the concentration of acetylmethionine silver, the less time it takes to dye hair. When the mass ratio of acetylmethionine silver is ≥4%, there is no obvious reduction in dyeing time and deepening of the dyed hair color, so the most preferred mass concentration of acetylmethionine silver is 4%.

[0019] The present invention is further specifically described below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0020] Example 1

[0021] Silver acetylmethionine, arginine and lysine were prepared into solutions according to the composition shown in Table 1. The solubility, hair dyeing color and hair dyeing time of the obtained solutions were evaluated.

[0022] Solubility evaluation:

[0023] Very good: Dissolves in pure water at room temperature and is a transparent liquid.

[0024] Dispersion: Suspension in pure water at room temperature.

[0025] Precipitation: Insoluble in pure water at room temperature, forming a precipitate.

[0026] The hair dyeing method is as follows: taking the same amount of real white hair and soaking them in the above solutions respectively, exposing them to sunlight on a sunny day, then rinsing them with clean water, and observing the hair dyeing effect.

[0027] Table 1

[0028]

[0029] Example 2

[0030] Silver acetylmethionine, arginine and lysine were prepared into a solution according to the composition shown in Table 2. The solubility, hair color and hair dyeing time of the obtained solution were evaluated. The hair dyeing method was the same as that of Experimental Example 1.

[0031] Table 2

[0032]

[0033]

[0034] When the mass ratio of acetylmethionine silver to arginine and lysine is 4:0.1-2:0.1-2, a completely dissolved and transparent solution can be obtained, and gray hair can be dyed. However, when arginine and lysine are not contained or the mass ratio of the three exceeds 4:2:2, the hair dyeing effect will decrease or no color will be obtained.

[0035] Embodiment 3-6

[0036] As Examples 3-6, single-dose hair dyes were prepared according to Table 3, wherein all are mass percentages. Comparative Examples 1-4 were prepared according to Table 4, wherein all are mass percentages.

[0037] Evaluation of single-component photosynthetic hair dyes

[0038] (1) Hair dyeing

[0039] Take the same amount of real white hair, apply the hair dyes in the example and the comparative example respectively, apply evenly, expose to sunlight for 15 minutes on a sunny day, rinse with clean water, observe the hair dyeing effect, and evaluate the hair dyeing property.

[0040] (Double circle): dark brown (chroma 3.0-4.0).

[0041] ○: Brown.

[0042] (Triangle): Light brown (chroma 5.0-6.0).

[0043] (Cross): No coloring.

[0044] ⑵Stability.

[0045] The hair dyes in the examples and comparative examples were filled into ordinary tubes with a capacity of 100 ml and placed in thermostats at 5° C. and 50° C. respectively. The smell, color and viscosity of the hair dyes in the tubes were observed once a day for 30 days.

[0046] (Double circle): Almost no change in 30 days.

[0047] ○: No change in odor or color, but a slight decrease in viscosity compared to room temperature.

[0048] (Triangle): The color turns black and the viscosity decreases significantly.

[0049] (X): The smell becomes foul, the color becomes black, and the viscosity decreases significantly.

[0050] Table 3

[0051]

[0052]

[0053] Table 4

[0054]

[0055]

[0056] The hair dyeing properties of Examples 3-6 of the present invention are excellent and the stability is good; the hair dyeing properties of Comparative Examples 1-4 are not good and the stability is poor.

Claims

1. A single-dose photosynthetic hair dye, characterized in that: The hair dye comprises silver acetylmethionine, arginine and lysine. The mass ratio of silver acetylmethionine, arginine and lysine in the single-dose photosynthetic hair dye is 4:0.1-2:0.1-2. The mass percentage of silver acetylmethionine in the single-dose photosynthetic hair dye is 1-8%.

2. The single-component photosynthetic hair dye according to claim 1, characterized in that: The single-dose photosynthetic hair dye is in the form of any one of a paste, a cream, and a gel.

3. The single-component photosynthetic hair dye according to claim 1, characterized in that: The single-dose photosynthetic hair dye also contains a polymer thickener, a wetting agent and a conditioning agent.

4. The single-component photosynthetic hair dye according to claim 1, characterized in that: The polymer thickener includes any one of cetearyl alcohol, polyvinyl alcohol, polyvinyl pyrrolidone, vinyl alcohol / vinyl amine copolymer, or hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer.

5. The single-component photosynthetic hair dye according to claim 1, characterized in that: The wetting agent includes any one of polyoxyethylene alkyl ether, sucrose fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ether, or polyoxyethylene sorbitan fatty acid ester.

6. The single-component photosynthetic hair dye according to claim 1, characterized in that: The conditioning agent includes any one of polyether modified silicone, alkoxy modified silicone, amino modified silicone, fatty acid modified silicone, squalene, squalane, liquid alkane, castor oil, cocoa butter, jojoba oil, avocado oil, and olive oil.

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