Shampoo containing oil control composition and preparation method thereof

Abstract

The invention discloses shampoo containing an oil control composition and a preparation method of the shampoo, and belongs to the technical field of cosmetics. The shampoo containing the oil control composition is prepared from the following components in percentage by mass: 0.02 to 1 percent of radix scutellariae extract, 0.05 to 0.9 percent of camellia seed cake extract, 0.05 to 1.8 percent of an antioxidant, 10 to 30 percent of sodium olefin sulfonate, 10 to 30 percent of lauryl hydroxyl sulfobetaine and 0.5 to 2.5 percent of cocamidomethyl MEA, wherein the scutellaria baicalensis root extract, the camellia seed cake extract and the antioxidant are oil control compositions; the antioxidant oil control composition capable of achieving synergistic interaction is prepared by a method of regulating and controlling pH and uniformly mixing; the oil control composition does not contain preservatives in the traditional sense, is milder and more stable in property, is more suitable for teenager scalp care, and can achieve the effects of oil control, bacteriostasis and dandruff removal.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a shampoo containing an oil-controlling composition and its preparation method. Background Technology

[0002] Adolescents experience a surge in sex hormone levels, leading to a rapid increase in sebum secretion and resulting in oily scalp. This manifests as enlarged pores, hyperkeratosis, an increase in skin microorganisms (such as Propionibacterium acnes and Staphylococcus aureus), enlarged sebaceous glands, and even cysts. When the scalp flora is imbalanced, harmful bacteria proliferate, irritating and affecting scalp health, causing itching, dandruff, and scalp inflammation. Malassezia multiplies excessively on the scalp, causing excessive proliferation of the stratum corneum, which promotes the abnormal shedding of stratum corneum cells in the form of white or gray scales, i.e., dandruff.

[0003] Currently, there are various anti-dandruff and oil-controlling shampoos and conditioners on the market. Their anti-dandruff and oil-controlling effects are achieved by adding chemical reagents such as anti-dandruff agents and antibacterial agents. For example, patent CN119454483A discloses a scalp care composition that uses a combination of selenium disulfide and piroctone ethanolamine salt as an antibacterial agent to achieve the effects of anti-dandruff, itch relief, and oil control. However, it uses irritating components, which can produce side effects. Long-term use can have adverse effects on human health, causing problems such as dry scalp, sensitivity, and recurring dandruff. Summary of the Invention

[0004] To overcome the difficulties of existing dandruff and oil-control products, such as irritating chemical components, limited effectiveness of single-ingredient products, and high costs, which make them unsuitable for the scalp needs of teenagers, this invention provides a shampoo containing an oil-control composition and its preparation method. One objective of this invention is to address problems such as difficulty in regulating scalp sebum, short hair follicle growth phase, difficulty in repairing scalp oxidative damage, and easy imbalance of scalp flora by providing a shampoo containing an oil-control composition. Another objective of this invention is to solve problems such as unstable foam, easy separation or deterioration, and scalp sensitivity, redness, itching, or recurring dandruff caused by use, by compounding the components in the shampoo containing the oil-control composition and controlling the preparation conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention provides a shampoo containing an oil-controlling composition, comprising the following components by mass percentage: 0.02-1% Scutellaria baicalensis root extract, 0.05-0.9% Camellia japonica seed cake extract, 0.05-1.8% antioxidant, 10-30% sodium olefin sulfonate, 10-30% lauryl hydroxysulfonate betaine, 0.5-2.5% cocamidomethyl MEA, and the balance being water; wherein the Scutellaria baicalensis root extract, Camellia japonica seed cake extract, and antioxidant constitute an oil-controlling composition.

[0006] The Scutellaria baicalensis root extract in this invention's oil-control composition is rich in baicalin, which can inhibit the activity of 5α-reductase in hair follicle sebaceous gland cells, reducing sebum secretion and controlling scalp sebum secretion from the source. Camellia seed cake extract, rich in tea saponins, can effectively remove oxidized sebum accumulated at the hair follicle opening, clearing follicle blockages. Antioxidants can prevent the active ingredients from being oxidized and deactivated or discolored, reducing oxidative stress damage and aging of the scalp. Current scalp problems often include oily scalp and hair follicle atrophy. The flavonoids in Camellia seed cake extract can accelerate the removal and absorption of sebum on the scalp surface, promote the penetration of baicalin, and reduce compensatory sebum secretion caused by scalp barrier damage. Antioxidants can prevent the peroxidation chain reaction, further helping to maintain the normal physiological function of scalp cells and the balance of sebum secretion. When the scalp is damaged, the scalp flora becomes unbalanced, and harmful bacteria such as Malassezia furfur proliferate. Tea saponins in camellia seed cake extract can promote the proliferation of beneficial bacteria on the scalp and inhibit Malassezia furfur, thus maintaining the balance of the scalp flora.

[0007] This invention, based on the oil-controlling composition's ability to inhibit excessive sebum secretion at its source, utilizes sodium olefin sulfonate and lauryl hydroxysulfonate to form micelles in water. These micelles simultaneously form hydrophobic cores, encapsulating the oil-controlling composition within them. This allows for uniform dispersion in water, preventing precipitation, increasing the viscosity of the cosmetic, resulting in denser and more stable foam. Furthermore, it gently removes excess oil from the scalp, reducing irritation. Cocamide methyl MEA, through hydrogen bonding with sodium olefin sulfonate and lauryl hydroxysulfonate, binds the micelles, active ingredients, and bubbles within a network structure, further increasing solution viscosity, enhancing system stability, and preventing stratification and precipitation. Moreover, cocamide methyl MEA not only further removes sebum but also has the ability to adhere to hair or scalp, increasing smoothness and moisturizing properties.

[0008] Preferably, the product comprises, by weight percentage: 0.08-0.2% Scutellaria baicalensis root extract, 0.1-0.6% Camellia japonica seed cake extract, 0.08-0.3% antioxidant, 15-25% sodium olefin sulfonate, 15-20% lauryl hydroxysulfonate betaine, 1-2% cocamidomethyl MEA, 1.5-2% processing aid, and the balance being water.

[0009] Preferably, the oil-control composition is 10-15% of the shampoo.

[0010] Preferably, sodium olefin sulfonate and lauryl hydroxysulfonate are phase A in the components; the mass of phase A is 75-80% of the shampoo.

[0011] Preferably, the components include 0.5-2.5% cocamidomethyl MEA and a processing aid of phase B; the mass of phase B is 5-10% of the shampoo.

[0012] Preferably, in the oil-controlling composition, the mass ratio of Scutellaria baicalensis root extract to Camellia oleifera seed cake extract is 1:(1-3); and the mass ratio of Camellia oleifera seed cake extract to antioxidant is (1-5):1.

[0013] This invention utilizes the active ingredients in camellia seed cake extract to clear sebum buildup and blockage in scalp hair follicles, promotes the penetration of effective ingredients such as baicalin in scutellaria root extract, and further enhances the ability of scutellaria root extract to inhibit sebum production at its source. It also works synergistically with cocoamide methyl MEA to nourish and smooth hair strands, preventing dryness and tangles, and making hair easier to manage. The addition of a small amount of antioxidants further enhances anti-inflammatory and antibacterial properties, and reduces the amount of preservatives used in processing aids, preventing abnormal sebum secretion and the recurring scalp sensitivity and dandruff. This not only effectively protects the active ingredients but also inhibits bacteria or fungi, preventing microorganisms from consuming the effective ingredients.

[0014] Preferably, the antioxidant is a sulfite, including one or more of sodium sulfite and sodium metabisulfite.

[0015] In this invention, the antioxidant used is sulfite, which can maintain a low-oxygen microenvironment, consume oxygen in the system, reduce the local oxygen concentration in the sebaceous gland follicle unit, and inhibit the mitochondrial respiratory chain complex of sebaceous gland cells in a hypoxic environment, thereby reducing lipid synthesis capacity. It forms a weakly acidic environment on the scalp surface, and can partially hydrolyze into sulfite, inhibiting the activity of fatty acid synthase and activating the expression of antimicrobial peptides of free fatty acids, effectively controlling oil production and fighting acne bacteria. Sulfite, through its sulfite ions, can prevent the squalene oxidation chain reaction, avoiding stimulation of abnormal keratinization of the sebaceous gland ducts and exacerbating scalp pore blockage.

[0016] Preferably, the oil-controlling composition contains baicalin at a content of ≥80% and tea saponin at a content of ≥60%.

[0017] The processing aids include one or more of sodium benzoate, phenoxyethanol, arginine, and citric acid.

[0018] The processing aids added in this invention mainly include preservatives and pH adjusters. The purpose is to further extend the product's shelf life, adjust the pH of the product system to create a slightly acidic environment for the scalp, reduce the tightness caused by product use, prevent compensatory oil production, promote the hydrolysis of sulfite into bisulfite, prevent the oxidation of baicalin, ensure the activity of tea saponins that unclog hair follicles, and maintain antibacterial activity.

[0019] On the other hand, the present invention provides a method for preparing a shampoo containing an oil-controlling composition, comprising the following steps: S1: Scutellaria baicalensis root extract and antioxidant are thoroughly stirred in water, the pH is adjusted to dissolve, and Camellia oleifera seed cake extract is added and stirred until dissolved to obtain the oil-controlling composition; S2: After mixing sodium olefin sulfonate and lauryl hydroxysulfonate, add the oil-controlling composition and cocamide methyl MEA and mix evenly to obtain a shampoo containing the oil-controlling composition.

[0020] Preferably, in step S1, the pH is 8-9.5; the pH adjuster is one or more of arginine and triethanolamine.

[0021] Preferably, in step S2, sodium olefin sulfonate and lauryl hydroxysulfonate are mixed evenly at 75-80°C, cooled to 40-45°C, and cocamidomethyl MEA and the oil-controlling composition are added. The mixture is stirred thoroughly until dissolved to obtain a shampoo containing the oil-controlling composition with a pH of 5-6.

[0022] Compared with the prior art, the present invention has the following beneficial effects: This invention maintains the color stability of baicalin and the emulsifying and surface activity of tea saponins, effectively eliminating pathogens, regulating sebum synthesis enzyme activity, reducing sebum secretion, and achieving physical cleaning and microenvironment regulation. This synergistic effect achieves oil control and dandruff removal while avoiding stimulation of sebaceous glands and clogging of scalp pores. Through a simple preparation method and easily controllable process conditions, this invention enables shampoos prepared using the oil-controlling composition of this invention to have strong cleaning power without excessive degreasing, improving gentleness, enhancing foam stability, reducing tightness after use, preventing compensatory oil production, avoiding abnormal sebum secretion, effectively protecting active ingredients, inhibiting bacteria or fungi, and preventing microorganisms from consuming the effective ingredients. Detailed Implementation

[0023] The present invention will now be described through specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] General Implementation Examples A method for preparing a shampoo containing an oil-controlling composition includes the following steps: S1: Weigh 0.02-1wt% of Scutellaria baicalensis root extract, 0.05-0.9wt% of Camellia oleifera seed cake extract, 0.05-1.8wt% of antioxidant, 10-30wt% of sodium olefin sulfonate, 10-30wt% of lauryl hydroxysulfonate betaine, and 0.5-2.5wt% of cocamide methyl MEA; preferably weigh 0.08-0.2wt% of Scutellaria baicalensis root extract, 0.1-0.6wt% of Camellia oleifera seed cake extract, 0.08-0.3wt% of antioxidant, 15-25wt% of sodium olefin sulfonate, 15-20wt% of lauryl hydroxysulfonate betaine, and 1-2wt% of cocamide methyl MEA; wherein, the mass ratio of Scutellaria baicalensis root extract to Camellia oleifera seed cake extract is 1:(1-3), the baicalin content is ≥80%, the tea saponin content is ≥60%, and the mass ratio of Camellia oleifera seed cake extract to antioxidant is (1-5):1; S2: Scutellaria baicalensis root extract and antioxidant are thoroughly stirred in water. The pH is adjusted to 8-9.5 until dissolved using at least one of arginine and triethanolamine as a pH adjuster. Camellia seed cake extract is added and stirred until dissolved to obtain an oil-controlling composition, the mass of which is 10-15% of the shampoo. S3: Sodium olefin sulfonate and lauryl hydroxysulfonate betaine are mixed in deionized water, heated to 75-80℃, and stirred thoroughly until completely dissolved to obtain phase A, which accounts for 75-80% of the shampoo. S4: After complete dissolution, begin cooling down to 40-45℃. Add phase B, including cocamide methyl MEA and 1.5-2 wt% of processing aids, and the oil-controlling composition obtained in step S1 to phase A. The processing aids include at least one of sodium benzoate, phenoxyethanol, arginine, and citric acid. The mass of phase B is 5-10% of the shampoo. Stir thoroughly until completely dissolved to obtain a transparent shampoo containing the oil-controlling composition with a pH of 5-6 and / or an opaque shampoo containing the oil-controlling composition.

[0025] Tests have shown that the product prepared by this invention can achieve gentle oil control and dandruff removal without causing adverse reactions. It can be used for a long time, has strong antioxidant and antibacterial properties, and has a long shelf life.

[0026] Examples 1-9 and Comparative Examples 1-6 In Examples 1-9 and Comparative Examples 1-6, a method for preparing an oil-controlling composition includes the following steps: S1: Take samples according to the dosage of each component in Table 1 for later use; S2: Add Scutellaria baicalensis root extract and antioxidant to deionized water, stir thoroughly, add arginine to adjust the pH to uniform dissolution, control the pH to 9, then add Camellia tataricus seed cake extract and stir until uniform dissolution, thus obtaining a composition that enhances the oil control of Scutellaria baicalensis root extract.

[0027] Comparative Example 7 Comparative Example 7 differs from Examples 1-9 in that it employs a method for preparing a pyrrolidone ethanolamine salt solution, comprising the following steps: Samples were taken according to the dosage of each component in Table 1. Pyrrolidone ethanolamine salt was added to deionized water and stirred thoroughly until dissolved. Arginine was added to adjust the pH to 9.

[0028] Table 1

[0029] The specific dosage schemes of each component in the oil-controlling composition in Examples 1-9 and Comparative Examples 1-7 are shown in Table 1.

[0030] Example 10 A method for preparing a shampoo containing an oil-controlling composition includes the following steps: S1: Scutellaria baicalensis root extract and antioxidant are thoroughly stirred in water, the pH is adjusted to dissolve, the pH is controlled at 9, and Camellia oleifera seed cake extract is added and stirred until dissolved to obtain the oil-controlling composition; S2: Sodium olefin sulfonate and lauryl hydroxysulfonate betaine are mixed in deionized water, heated to 80°C, and stirred thoroughly until completely dissolved to obtain phase A; S3: After complete dissolution, begin cooling down to 40°C. Add phase B, which includes cocamidomethyl MEA, sodium benzoate, phenoxyethanol, arginine, and citric acid, and the oil-controlling composition obtained in step S1 to phase A. Stir thoroughly until completely dissolved to obtain a cleansing product with a pH of 5-6—a transparent shampoo containing the oil-controlling composition.

[0031] Table 2

[0032] The amounts of components used in Example 10 are shown in Table 2.

[0033] Example 11 A method for preparing a shampoo containing an oil-controlling composition includes the following steps: S1: Scutellaria baicalensis root extract and antioxidant are thoroughly stirred in water, the pH is adjusted to dissolve, the pH is controlled at 9, and Camellia oleifera seed cake extract is added and stirred until dissolved to obtain the oil-controlling composition; S2: Sodium olefin sulfonate and lauryl hydroxysulfonate betaine are mixed in deionized water, heated to 80°C, and stirred thoroughly until completely dissolved to obtain phase A; S3: After complete dissolution, begin cooling down to 40°C. Add phase B, which includes cocamidomethyl MEA, sodium benzoate, phenoxyethanol, arginine, citric acid, and styrene / acrylate copolymer, and the oil-controlling composition obtained in step S1 to phase A. Stir thoroughly until completely dissolved to obtain a cleansing product with a pH of 5-6—an opaque shampoo containing the oil-controlling composition.

[0034] Table 3

[0035] The amounts of components used in Example 11 are shown in Table 3.

[0036] Comparative Example 8 The difference between this comparative example and Example 10 is that no oil-controlling composition was added in Comparative Example 8, the preparation method was the same as in Example 10, and the content change was adjusted to 100wt% with deionized water.

[0037] Comparative Example 9 The difference between this comparative example and Example 10 is that in Comparative Example 9, the pyrrolidone ethanolamine salt solution from Comparative Example 7 is used instead of the oil-controlling composition. The preparation method is the same as in Example 10, and the content change is adjusted to 100 wt% with deionized water.

[0038] Detection Example 1 The oil-controlling compositions prepared in Examples 1-9 and Comparative Examples 1-7 were tested. The test items included: relative lipid content in SZ95 cells and lipid inhibition rate. The testing method includes the following steps: Sebaceous gland cell suspension (SZ95 strain) extracted from tissue samples is seeded into 96-well cell culture plates and cultured for 18-24 hours until the cells reach 80% confluence; the original culture medium in the wells is discarded, and 50 μL of sample solution is added to each well sequentially. During the experiment, a blank control (Group B), a model (Group M), and a positive control (PC) are set up. The positive control is isotretinoin, and the experimental test groups are samples from Examples 1-9 and Comparative Examples 1-7 with a sample concentration of 10... -4 %; after sample addition, the model group was added with 50 μL of cell culture medium, and the other groups were added with 50 μL of cell culture medium containing linoleic acid; after sample addition, the culture plates were placed in an incubator and cultured for (24±1) h. After culture, the plates were washed once with PBS, and 100 μL of Nile Red was added to each well. The plates were reacted at 37℃ in the dark for 20 min, and the fluorescence intensity was detected at Ex / Em=485 nm / 565 nm.

[0039] In the formula, MEI 样品 The mean fluorescence intensity of the sample group, MEI B The mean fluorescence intensity and MEI of group BM The value represents the mean fluorescence intensity of group M. The test results are shown in Table 4 below.

[0040] Table 4

[0041] As shown in Table 4, compared with the blank control group, the relative lipid content of the model group increased significantly, indicating that the stimulation was effective; compared with the model group, the relative lipid content of the positive control group decreased significantly, indicating that the modeling was successful. Analysis revealed that the lipid inhibition rate of Examples 1-9 was 17-30.6%, while the lipid inhibition rate of Comparative Examples 1-6 was only 3.4-6%. These results indicate that the composition provided by this invention has excellent lipid inhibition effects. The composition provided by this invention can regulate cell metabolism, inhibit lipid production at its source, and reduce lipid synthesis and accumulation. Furthermore, in Comparative Example 7, when the amount of piroctone olamine salt was 1 wt%, the lipid inhibition rate increased to 17.96%, but its effect was comparable to the composition of this invention consisting of 0.08 wt% Scutellaria baicalensis root extract, 0.4 wt% Camellia japonica seed cake extract, and 0.1 wt% sulfuric acid metabisulfite. These results indicate that the composition of this invention can still significantly enhance the ability of the composition to inhibit cell lipid production without adding the relatively expensive chemical component piroctone olamine salt.

[0042] Detection Example 2 Antibacterial tests were conducted on the compositions prepared in Examples 1-9, Comparative Examples 4 and 5, the transparent shampoo containing an oil-controlling composition for cleaning prepared in Example 10, the opaque shampoo containing an oil-controlling composition for cleaning prepared in Example 11, and the shampoos prepared in Comparative Examples 8 and 9. The antibacterial tests were conducted in accordance with the "WS / T650-2019 Evaluation Method for Antibacterial and Antimicrobial Effects 5.1.1 Quantitative Suspension Antibacterial Test". The test includes the following steps: Take a fresh slant culture of the test bacteria after 24 hours of culture, wash it off with PBS, and dilute it with PBS to approximately 5.0 × 10⁻⁶. 5 CFU / mL -4.5×10 6 Prepare a CFU / mL bacterial suspension. Take a sterile test tube, add 5.0 mL of sample (use stock solution or diluent as required by the instructions), place in water at 20℃±1℃ for 5 min, then add 0.1 mL of the test bacterial suspension, mix quickly and start timing immediately. After the test bacteria and sample have interacted for the time specified in the instructions, inoculate 1.0 mL of the test bacteria and sample mixture into two Petri dishes and pour the culture medium. If the bacterial count cannot be counted, perform a 10-fold serial dilution with PBS, select an appropriate dilution, inoculate 1.0 mL into two Petri dishes, and perform viable cell culture and counting. At the same time, use PBS instead of the sample to perform parallel tests as a positive control. The recovered colony count of the positive control should be 1.0 × 10⁻⁶.4 CFU / mL - 9.0 × 10 4 The concentrations were between CFU / mL. PBS and culture medium from the same batch were used as negative controls. All test and control samples were cultured at 36℃±1℃ for 48 hours to observe the final results. The experiment was repeated three times, and the inhibition rate was calculated. The experimental bacterial groups were Malassezia furfur and Staphylococcus aureus. Result interpretation: inhibition rate <50% indicates no antibacterial effect; inhibition rate >50-90% indicates antibacterial effect; inhibition rate >90% indicates strong antibacterial effect. The test results are shown in Table 5 below.

[0043] Table 5

[0044] As shown in Table 5, the compositions prepared in Examples 1-9, the transparent shampoo containing an oil-controlling composition prepared in Example 10, and the opaque shampoo containing an oil-controlling composition prepared in Example 11 all exhibited antibacterial rates of over 99% against Malassezia furfur and Staphylococcus aureus, indicating strong antibacterial effects. Comparative Example 4 did not contain Scutellaria baicalensis root extract, and Comparative Example 5 did not contain Camellia japonica seed cake extract. Compared to Comparative Examples 4 and 5, Examples 1-9 showed significantly higher antibacterial effects against Malassezia furfur and Staphylococcus aureus than Comparative Examples 4, 5, and 6. This demonstrates that Scutellaria baicalensis root extract, Camellia japonica seed cake extract, and the antioxidant sulfite all synergistically inhibit the growth of Malassezia furfur and Staphylococcus aureus. The shampoo prepared in Comparative Example 8 did not contain the Scutellaria baicalensis root extract oil-control composition, while Comparative Example 9 contained 1 wt% of pyrrolidone ethanolamine salt. Compared with Comparative Examples 8 and 9, Example 10 shows that the oil-control composition provided by the present invention and the combination of each component of phase A and phase B can produce a strong antibacterial effect against Malassezia furfur and Staphylococcus aureus. Moreover, the present invention can significantly improve the antibacterial effect of the composition against Malassezia furfur and Staphylococcus aureus without adding the expensive and easily irritating chemical component pyrrolidone ethanolamine salt.

[0045] Test Example 3 The shampoos prepared in Examples 10-11 and Comparative Examples 8-9 were subjected to product stability testing. The testing procedure included placing the samples at -10℃, 5℃, 25℃, and 45℃ for three months for stability observation to determine the product stability. If no precipitation instability or significant color change occurred, the stability was considered passed. A indicates no precipitation problem and no significant color change; B indicates no precipitation problem but a significant color change visible to the naked eye; C indicates no significant color change but visible precipitation. The test results are shown in Table 6 below.

[0046] Table 6

[0047] As shown in Table 6, the shampoos prepared in Examples 10 and 11 did not exhibit precipitation or discoloration after three months of storage at -10°C, 5°C, 25°C, and 45°C, respectively. In contrast, Comparative Example 9, which contained pyrrolidone ethanolamine salt, showed discoloration after three months of storage at all temperatures. These results indicate that the products prepared according to this invention exhibit excellent stability after storage at low, room, and high temperatures. The products without the added oil-controlling composition also showed no significant precipitation or discoloration. However, the products with added pyrrolidone ethanolamine salt showed more severe discoloration, affecting their usability. This demonstrates that the synergistic effect between the components of the composition proposed in this invention effectively enhances antioxidant properties, maintains product stability, and effectively extends the product's shelf life.

[0048] Detection Example 4 The shampoos prepared in Example 10 and Comparative Example 8 were tested for their oil-controlling, dandruff-removing, and soothing effects on the human body. The tests included the following steps: Subjects: 60 subjects were selected in each group (two groups in total, corresponding to Example 10 and Comparative Example 8 respectively); the subjects were healthy individuals aged 18-25 years who reported having oily scalp and dandruff problems, washed their hair once every 2 days, had no history of allergies to the ingredients of the test product, had no mental illness, no serious liver or kidney disease or other autoimmune diseases, were not pregnant or within 6 months postpartum, and had not taken antibiotics, glucocorticoids, anti-androgens such as spironolactone, or other acne treatments in the 4 weeks prior to the trial, and had not used physical therapy or salicylic acid and glycolic acid to treat acne. Experimental Method: Participants took an appropriate amount of the test product, lathered it in their palms, applied it to their scalp, and massaged it thoroughly with their fingertips. After 2-3 minutes, they rinsed it off with clean water, replacing their regular shampoo. The frequency of use was once every two days. During the entire testing period, participants were prohibited from prolonged sun exposure, outdoor activities, or travel. They were also prohibited from using cosmetics or medications with similar effects to the product, and from changing their daily hair care habits. Observation Results: Participants self-rated their scalp oiliness, dandruff, scalp itching, and dry hair on a scale of 0-10, with higher scores indicating more severe problems. The rating results are shown in the table below, where the data represents the rate of change from day 0 to day 14 and day 28. Participants' satisfaction with the test product was collected, including improvements in scalp problems such as dandruff and scalp itching, and evaluations of the product's cleansing and oil-controlling effects. The test results are shown in Table 7 below.

[0049] Table 7

[0050] As shown in Table 7, the clear shampoo containing the oil-control composition prepared in Example 10 has significantly better oil control and soothing properties than Comparative Example 8. The above results indicate that the oil-control composition provided by the present invention and the shampoo prepared by compounding the components of phase A and phase B can significantly improve the scalp oil environment and have excellent oil control and dandruff removal effects.

[0051] Case 5 The products prepared in Examples 10 and 11 and Comparative Examples 8 and 9 were subjected to a closed skin patch test. The closed skin patch test method included the following steps: selecting patches with an area not exceeding 50 mm². 2 A qualified plaque applicator with a depth of approximately 1 mm is required. The test substance is added to the applicator in an amount of approximately 0.020-0.025 g (solid or semi-solid) or 0.020-0.025 mL (liquid). The plaque applicator containing the test substance and negative control is applied to the flexor side of the subject's forearm and removed after 24 hours. Skin reactions were observed according to standards at 30 min, 2 h, and 48 h after removal of the test patch, and the results were recorded. The subjects were individuals aged 18-25 years, with 33 participants. The scoring criteria were as follows: Grade 0: Negative reaction; Grade 1: Suspicious reaction, only slight erythema; Grade 2: Weak positive reaction (erythema reaction); erythema, infiltration, edema, and possible papules; Grade 3: Strong positive reaction (herpes reaction); erythema, infiltration, edema, papules, and vesicles; the reaction may extend beyond the test area; Grade 4: Very strong positive reaction (confluent herpes reaction); obvious erythema, severe infiltration, edema, and confluent herpes; the reaction extends beyond the test area. The test results are shown in Table 8 below.

[0052] Table 8

[0053] As shown in Table 8, no adverse reactions were observed in the skin patch tests of the products prepared in Examples 10, 11, and Comparative Example 8. However, a Grade 1 adverse reaction occurred in Comparative Example 9, indicating that it would cause adverse reactions to the skin. This suggests that piroctone olamine salt is irritating and that long-term use may have adverse effects on human health, potentially causing problems such as dry scalp, sensitivity, and recurring dandruff. However, the shampoo containing the oil-control composition provided by this invention has the effect of gently controlling oil and removing dandruff without causing adverse reactions and can be used for a long time.

Claims

1. A shampoo containing an oil-controlling composition, characterized in that, By weight percentage, it includes the following components: Scutellaria baicalensis root extract 0.02-1%, Camellia japonica seed cake extract 0.05-0.9%, antioxidant 0.05-1.8%, sodium olefin sulfonate 10-30%, lauryl hydroxysulfonate betaine 10-30%, cocamidomethyl MEA 0.5-2.5%, and the balance being water; The components include Scutellaria baicalensis root extract, Camellia japonica seed cake extract, and antioxidants, forming an oil-controlling composition.

2. The shampoo containing an oil-controlling composition according to claim 1, characterized in that, By weight percentage, it comprises the following components: Scutellaria baicalensis root extract 0.08-0.2%, Camellia japonica seed cake extract 0.1-0.6%, antioxidant 0.08-0.3%, sodium olefin sulfonate 15-25%, lauryl hydroxysulfonate betaine 15-20%, cocamidomethyl MEA 1-2%, processing aids 1.5-2%, and the balance being water.

3. The shampoo containing an oil-controlling composition according to claim 1, characterized in that, The oil-control composition is 10-15% of the shampoo.

4. The shampoo containing an oil-controlling composition according to claim 1, characterized in that, In the oil-controlling composition, the mass ratio of Scutellaria baicalensis root extract to Camellia japonica seed cake extract is 1: (1-3); The mass ratio of camellia seed cake extract to antioxidant was (1-5):

1.

5. A shampoo containing an oil-controlling composition according to claim 1 or 2, characterized in that, The antioxidant is a sulfite, including one or more of sodium sulfite and sodium metabisulfite.

6. A shampoo containing an oil-controlling composition according to claim 1, characterized in that, The oil-controlling composition contains baicalin at a content of ≥80% and tea saponin at a content of ≥60%.

7. A shampoo containing an oil-controlling composition according to claim 2, characterized in that, The processing aids include one or more of sodium benzoate, phenoxyethanol, arginine, and citric acid.

8. A method for preparing a shampoo containing an oil-controlling composition, characterized in that, Includes the following steps: S1: Scutellaria baicalensis root extract and antioxidant are thoroughly stirred in water, the pH is adjusted to dissolve, and Camellia oleifera seed cake extract is added and stirred until dissolved to obtain the oil-controlling composition; S2: After mixing sodium olefin sulfonate and lauryl hydroxysulfonate, add the oil-controlling composition and cocamide methyl MEA and mix evenly to obtain a shampoo containing the oil-controlling composition.

9. A method for preparing a shampoo containing an oil-controlling composition according to claim 8, characterized in that, In step S1, the pH is 8-9.5; the pH adjuster is one or more of arginine and triethanolamine.

10. A method for preparing a shampoo containing an oil-controlling composition according to claim 8, characterized in that, In step S2, sodium olefin sulfonate and lauryl hydroxysulfonate are mixed evenly at 75-80°C, cooled to 40-45°C, and cocamidomethyl MEA and oil-controlling composition are added. The mixture is stirred thoroughly until dissolved to obtain a shampoo containing the oil-controlling composition with a pH of 5-6.

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