A hair-use composition and its uses, daily chemical products

Abstract

This invention belongs to the field of cosmetics and discloses a hair care composition and its uses, as well as a daily chemical product. The hair care composition includes the following components: dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract. The mass ratio of dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract in the hair care composition is 5-40:5-50:1-20:1-20:1-20. The hair care composition obtained by this invention utilizes the synergistic effect of dihydroxyindole, cysteine, and the three plant extracts, as well as the synergistic effect among the three plant extracts, to make the entire system more stable and achieve a better coloring effect. At the same time, the hair care composition contains hydrolyzed keratin, which has the effect of protecting hair and color.

Description

Technical Field

[0001] This invention relates to the field of cosmetics, and mainly discloses a hair-use composition and its uses, as well as daily chemical products. Background Technology

[0002] Since ancient times, people have experimented with various natural materials to change their hair color in pursuit of beauty or to signify status. With the development of the times, modern hair dyeing products emerged. Early hair dyeing compositions mostly relied on chemically synthesized dyes, which, while meeting basic coloring needs, had many problems. Ingredients such as p-phenylenediamine were widely used in early hair dyes, and their excellent coloring ability attracted much attention. However, its harm to human health should not be underestimated; besides being highly allergenic, long-term exposure may even pose a cancer risk. At the same time, the alkaline components in these hair dyes can damage the hair's cuticle structure, causing internal moisture loss and resulting in dry, split, and dull hair.

[0003] Amidst numerous issues with traditional hair dye ingredients, dihydroxyindole has begun to gain attention. Dihydroxyindole is a naturally occurring indole derivative found in hair melanin. Compared to traditional hair dye ingredients like p-phenylenediamine, it offers unique advantages. In terms of safety, dihydroxyindole has lower sensitization rates and poses less potential threat to human health. Regarding dyeing results, it provides a more natural color because its structure is similar to hair's own melanin, resulting in a color closer to natural hair color. Furthermore, dihydroxyindole offers some protection to the hair, reducing hair damage caused by the dyeing process.

[0004] In recent years, the application of plant pigments in hair dyeing has gradually gained attention. Plant pigments are widely available, commonly found in the roots, stems, leaves, flowers, and fruits of various plants. These plant pigments are natural and mild, causing less irritation to the scalp and hair. From an environmental perspective, compared to chemically synthesized dyes, the production process of plant pigments is more environmentally friendly, reducing pollution. However, plant pigments also have some limitations, such as relatively poor colorfastness, the color tends to fade after multiple washes, and a relatively limited range of colors, making it difficult to create extremely vibrant or unique colors.

[0005] The prior art CN 116617101 B discloses a pigment composition for dyeing, darkening, and nourishing hair, including pigments obtained from plant sources, a simulated melanin precursor, peroxides, and organic compounds that are miscible or insoluble in water. This scheme uses plant pigments as coloring agents for dyeing and darkening hair, which does avoid problems such as scalp allergies caused by phenylenediamine and its derivatives, hydrogen peroxide, etc. However, further observation revealed that this scheme also has certain problems. Its coloring effect is not good, and the dyeing durability of plant pigments is relatively poor. Moreover, multiple surfactants must be added to maintain the stability of the system, and the preparation process is relatively complex.

[0006] Prior art CN 116889524 A discloses a hair-darkening composition based on polydihydroxyindole liposomes, comprising the following components by weight: polydihydroxyindole liposomes, a penetration enhancer, a stabilizer, a synergist, and a pH adjuster. This method prepares polydihydroxyindole into liposomes, thereby maintaining the stability of the polydihydroxyindole. However, the process of this method is relatively complex, and it also requires the addition of additional stabilizers to maintain stability.

[0007] Therefore, the technical problem to be solved by the present invention is: how to prepare a hair composition that not only has a better hair dyeing and blackening effect, but also has hair care function, can maintain system stability, and has long-lasting dyeing and hair care. Summary of the Invention

[0008] The present invention discloses a hair-care composition comprising dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract. This composition utilizes the synergistic effects of dihydroxyindole, cysteine, and the three plant extracts, as well as the synergistic effects among the three plant extracts, to make the entire system more stable and achieve better coloring results. In a preferred embodiment of the present invention, hydrolyzed keratin, a hair-care ingredient, is added to the hair-care composition, which has hair-care and color-protecting effects.

[0009] In addition, the present invention also provides the uses of the hair-applied composition and its application in daily chemical products.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A hair care composition comprising the following components: dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract; wherein the mass ratio of dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract in the hair care composition is 5-40:5-50:1-20:1-20:1-20.

[0012] The technical solution of this invention uses dihydroxyindole, cysteine, black tea cocoon leaf extract, raspberry leaf extract, and perilla leaf extract to prepare a hair-care composition. When these substances are used together, they exhibit a synergistic effect. The possible mechanism is speculated to be:

[0013] Dihydroxyindole is relatively easy to oxidize, turning black and forming a large molecular structure, which increases the difficulty of penetrating the hair and ultimately reduces its effectiveness. Cysteine, on the other hand, contains a sulfhydryl group (-SH), which has strong reducing properties. Using cysteine ​​can effectively prevent dihydroxyindole from oxidizing, keeping it in a small molecular form and facilitating its penetration into the hair. At the same time, cysteine ​​has a stretching effect on the disulfide bonds in hair, which further helps dihydroxyindole penetrate into the inner layer of the hair, enhancing the hair dyeing effect.

[0014] Black tea leaf extract is rich in flavonoids, vitamin C, polyphenols and anthocyanins. Vitamin C has an antioxidant effect, and polyphenols can effectively chelate metal ions to prevent dihydroxyindole from oxidizing and accumulating too early and too quickly.

[0015] Raspberry leaf extract is rich in ellagic acid, raspberry ketone, phenolic acids and flavonoids, which help form more stable melanin polymers with dihydroxyindole and bind more firmly to hair protein.

[0016] Perilla leaf extract is rich in rosmarinic acid, flavonoids, phenolic acids and terpenoids, which can effectively reduce the resistance of the stratum corneum barrier, promote the opening of hair cuticles, and promote the penetration and diffusion of dihydroxyindole and other active ingredients into the hair cortex.

[0017] Black tea leaf extract, raspberry leaf extract, and perilla leaf extract all contain plant pigments. Dihydroxyindole has a complementary penetration effect on these three plant extracts. When it enters the hair first, it can make the large-molecule plant pigments enter the hair more smoothly and bind with specific amino acid residues in hair keratin through hydrogen bonds, van der Waals forces, etc., thereby enhancing the hair dyeing effect. In addition, these three plant extracts also have a synergistic effect in increasing the hair dyeing effect.

[0018] When the above components are used in combination, cysteine ​​ensures that dihydroxyindole and plant extracts can efficiently penetrate into the hair. Only then will dihydroxyindole oxidize with air to form a macromolecular structure. The plant pigments and dihydroxyindole in the plant extracts bind to different parts of the hair keratin or different amino acid residues, forming multiple binding sites. This makes the plant pigments adhere more firmly to the hair, making them less likely to be washed off, thus enhancing the effect and durability of the hair dye.

[0019] Preferably, the dihydroxyindole is one or more combinations of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, and polydihydroxyindole.

[0020] Preferably, the hair composition further contains hydrolyzed keratin, wherein the mass ratio of hydrolyzed keratin to dihydroxyindole is 1-25:5-30.

[0021] Hydrolyzed keratin, especially low molecular weight hydrolyzed keratin, can penetrate the hair core and bind with dihydroxyindole, making the hair dyeing and darkening effect more durable; it also replenishes the nutrients lost by the hair, repairs damaged hair cuticles, and makes the scalp smoother and shinier.

[0022] Furthermore, the present invention also provides the use of the hair-applied composition described above in the preparation of daily chemical products.

[0023] Preferably, the daily chemical product is a daily chemical product used for hair dyeing and hair care.

[0024] Finally, the present invention also discloses a daily chemical product containing the hair-care composition as described above.

[0025] Preferably, the content of the hair-applied composition in the said daily chemical product is 0.01wt% to 10wt%.

[0026] Preferably, the dosage form of the daily chemical product is one of spray, paste, powder, emulsion, or foam.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The hair composition prepared by this invention contains dihydroxyindole, cysteine, black tea leaf extract, raspberry leaf extract, and perilla leaf extract. This composition utilizes the synergistic effect of dihydroxyindole, cysteine, and the three plant extracts, as well as the synergistic effect among the three plant extracts themselves, to make the entire system more stable and achieve a better coloring effect. Simultaneously, the hair composition contains hydrolyzed keratin, a hair-care ingredient, which has hair-care and color-protecting effects. Attached Figure Description

[0029] Figure 1 A photo of the volunteer's hair before it was dyed;

[0030] Figure 2 Photos of volunteers' hair after using hair dye. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Product Information:

[0033] Polydihydroxyindole: purchased from Sichuan Meilaning Polymer Materials Co., Ltd.;

[0034] 5,6-Dihydroxyindole: purchased from Guangzhou Jiaozi Daily Chemical Co., Ltd.;

[0035] 5,6-Dihydroxyindole-2-carboxylic acid: purchased from Hubei Jianchu Biomedical Co., Ltd.;

[0036] Black tea leaf extract: purchased from Xianting (Guangzhou) Trading Co., Ltd., with an active ingredient content of 25wt%.

[0037] Raspberry leaf extract: purchased from Xianting (Guangzhou) Trading Co., Ltd., with an active ingredient content of 25wt%;

[0038] Perilla leaf extract: purchased from Guangzhou Luojie Biotechnology Co., Ltd., with an active ingredient content of 30wt%;

[0039] Hydrolyzed keratin: Purchased from Seiwa Kasei Co., Ltd., with a molecular weight of approximately 400 Daltons.

[0040] Example

[0041] A hair dye, the formula of which is shown in Table 1;

[0042] Table 1 Hair Dye Formula Table

[0043]

[0044]

[0045] The formulations of the hair-use compositions described in Table 1 can be found in Table 2; wherein, the dihydroxyindole in composition 4 is 5,6-dihydroxyindole; the dihydroxyindole in composition 5 is 5,6-dihydroxyindole-2-carboxylic acid; and the dihydroxyindole in the remaining compositions is polydihydroxyindole.

[0046] Table 2 Formulation of Compositions for Use (parts by weight)

[0047]

[0048]

[0049] After applying different compositions to hair dye, hair dye 1 to 16 are obtained; the hair composition corresponding to hair dye 1 to 16 is composition 1 to 16 respectively.

[0050] Performance testing

[0051] Test the obtained hair dyes 1-16 according to the following methods:

[0052] Stimulation tests:

[0053] Ten male and ten female volunteers were randomly selected. Hair dye prepared according to composition 6 and an ammonia-based hair dye were applied to the back of the volunteers' ears, respectively. The left ear received the ammonia-based hair dye, and the right ear received the hair dye prepared according to this product. One hour later, over 80% of the participants reported varying degrees of itching and irritation in their left ears, but none of the 20 volunteers experienced any discomfort in their right ears. This demonstrates that the hair dye of this invention is non-irritating to the skin.

[0054] Lab test:

[0055] The hair dye was used to conduct dyeing tests and Lab evaluations on detached hair strands. The specific method was as follows: hair dye was applied to 50% of gray hair with an L value of 38.4, the hair was rubbed and left on for 10 minutes, and left on for 60 minutes; then it was washed with water and blow-dried.

[0056] The Lab value of hair was tested using a CM700D colorimeter. The hair was straightened and laid flat on a table. The CM700D automatically measured the hair three times, and the average value was taken. L, a, and b are parameters of the standard international color space diagram. L value indicates black and white; the larger the L value, the whiter the hair. a value indicates red and green; the larger the a value, the redder the hair. b value indicates yellow and blue; the larger the b value, the yellower the hair. The L value of normal black hair is 15-19; the smaller the L value, the blacker the hair. The test results are shown in Table 3.

[0057] Table 3 Results Data Table

[0058] L a b Hair dye 1 16.42 0.34 0.06 Hair dye 2 18.17 0.41 0.10 Hair dye 3 15.29 0.46 0.23 Hair dye 4 17.33 -0.08 0.76 Hair dye 5 18.68 0.83 2.32 Hair dye 6 17.70 0.41 0.13 Hair dye 7 17.11 0.44 0.18 Hair dye 8 20.02 0.99 1.11 Hair dye 9 21.06 0.9 1.49 Hair dye 10 20.42 0.54 0.94 Hair dye 11 22.58 0.65 2.06 Hair dye 12 23.08 1.0 2.54 Hair dye 13 22.52 1.78 2.76 Hair dye 14 29.33 0.86 2.86 Hair dye 15 23.2 1.14 1.39 Hair dye 16 27.65 0.56 2.49

[0059] As can be seen from the test results in Table 3, hair dye 3 has the lowest L value, resulting in the darkest hair. The L values ​​of hair dyes 1 through 7 all do not exceed 19, indicating that their hair-dyeing and darkening compositions all have good hair-dyeing and darkening effects. Hair dye 6 underwent volunteer testing, with results obtained before dyeing (…). Figure 1 ) after staining ( Figure 2 The comparison also shows a very good hair dyeing and darkening effect and a very good hair shine.

[0060] Hair dye creams 8-10 lack any one of the following components: black tea leaf extract, raspberry leaf extract, and perilla leaf extract, resulting in an increased L value. Hair dye creams 11-13 contain only one of the following components: black tea leaf extract, raspberry leaf extract, and perilla leaf extract, resulting in a further increased L value. Data from hair dye creams 8-13 indicate that the hair dye composition of the present invention, utilizing a combination of black tea leaf extract, raspberry leaf extract, and perilla leaf extract, has a significant synergistic effect in enhancing the hair dyeing and darkening effect.

[0061] Furthermore, the hair dye composition of hair dye cream 14-16 lacks dihydroxyindole, three plant extracts or cysteine, and its L value is significantly increased, ranging from 23.2 to 29.33, indicating that its hair dyeing and darkening effect is poor.

[0062] Hair care effect test

[0063] The following tests were conducted on hair dyes 6 and 7:

[0064] The change in hair gloss was analyzed by measuring the Gloss value using a Glossymeter (GL200, Germany). A higher Gloss value indicates better surface gloss. Gloss values ​​before and after dyeing were taken as the average of three parallel measurements, and the rate of change in gloss was calculated. The results are shown in Table 4.

[0065] Table 4. Glossiness Change Rate

[0066] Before dyeing hair After dyeing hair Gloss change rate Hair dye 6 4.45 4.98 11.91％ Hair dye 7 4.58 5.11 11.57％

[0067] After using hair dye 6, the shine of the original hair strands increased by 11.91%; after using hair dye 7, the shine increased by 11.57%. This indicates that hydrolyzed keratin can effectively replenish the nutrients lost from the hair, improve its shine, and has a hair care effect.

[0068] The changes in the average overall load value (N) before and after using hair dye were compared using a dynamic combing device (SK-7A, Japan). The smaller the average overall load value, the better the smoothness of the hair and the easier it is to comb. The average overall load values ​​before and after hair dyeing were the average of three parallel measurements. The average overall load change rate is shown in Table 5.

[0069] Table 5 Average Comprehensive Load Change Rate

[0070] Before hair dyeing (N) After hair dyeing (N) Average composite load change rate Hair dye 6 1327.88 705.21 -47％ Hair dye 7 1258.36 731.59 -42％

[0071] After using hair dye 6 on the original hair strands, the average overall load change rate was -47%; after using hair dye 7 on the original hair strands, the average overall load change rate was -42%. This indicates that hydrolyzed keratin significantly improves the smoothness of the hair strands and has excellent conditioning properties for the hair.

[0072] As can be seen from the data in Tables 4 and 5, hydrolyzed keratin was added to the hair dye compositions of hair dye 6 and hair dye 7, giving them hair care effects.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A hair composition characterized in that, The hair composition comprises the following components: dihydroxyindole, cysteine, black tea Piper nigrum leaf extract, raspberry leaf extract, perilla leaf extract; the mass ratio of dihydroxyindole, cysteine, black tea Piper nigrum leaf extract, raspberry leaf extract, perilla leaf extract in the hair composition is 5-40:5-50:1-20:1-20:1-20.

2. A composition for application to the hair according to claim 1, characterized in that, The dihydroxyindole is one or a combination of 5,6-dihydroxyindole, 5,6-dihydroxyindole-2-carboxylic acid, and polydihydroxyindole.

3. The hair composition according to claim 1, wherein The hair composition further comprises hydrolyzed keratin, and the mass ratio of hydrolyzed keratin to dihydroxyindole is 1-25:5-30.

4. Use of the hair composition according to any one of claims 1-3 for preparing a daily-use product.

5. Use according to claim 4, characterized in that, The daily-use product is a daily-use product for dyeing and conditioning hair.

6. A daily care product, characterized in that The daily-use product contains the hair composition according to any one of claims 1-3.

7. The daily cosmetic according to claim 6, wherein The content of the hair composition in the daily-use product is 0.01wt%-10wt%.

8. The daily cosmetic according to claim 6, characterized by, The dosage form of the daily-use product is one of spray, cream, powder, emulsion, and foam.

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