A soothing and cooling spray after hair removal and preparation method thereof

Abstract

The present invention discloses a soothing and cooling spray after hair removal and a preparation method thereof. The soothing and cooling spray after hair removal comprises, by mass, 88 to 95 parts of water, 1 to 3 parts of preservatives, 0.3 to 0.6 parts of moisturizers, 0.3 to 1 parts of skin conditioners, 0.1 to 0.4 parts of skin protectants, 0.01 to 0.7 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers include erythritol, PPG‑13‑decyltetradecanol polyether‑24, and vitamin E; the skin conditioners include aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract; and the skin protectants include allantoin, caprylic / capric triglyceride, and polyglycerol‑6. The spray is released in a convenient spray form, and does not need to be applied by hand. Users only need to spray lightly to enjoy the multiple effects of rapid cooling, moisturizing, and soothing and repairing.

Description

Technical Field

[0001] The invention belongs to the technical field of daily chemical products, and in particular relates to a soothing and cooling spray after hair removal and a preparation method thereof. Background Art

[0002] In the field of modern beauty and personal care, hair removal has become a part of daily care for many people. There are currently two main methods of hair removal on the market: chemical depilatory creams and photon hair removal devices (IPL). Chemical depilatory creams use alkaline chemical depilatories to destroy the disulfide bonds in the hair, causing the hair to break and be easily removed. However, the pH value of such products is usually between 11.5 and 12.0, which is a strong alkaline environment and has significant irritation to the skin, causing users to often experience discomfort such as itching, redness, and even burning after use. On the other hand, photon hair removal devices use pulsed light of a specific wavelength to irradiate hair follicles to achieve the effect of permanently reducing hair growth. Although this method is more durable than chemical hair removal, in actual operation, due to the heat generated by the light energy transferred to the skin tissue, users may feel varying degrees of tingling, especially for people with sensitive skin, this discomfort may be more obvious.

[0003] In response to the skin irritation caused by the above-mentioned hair removal process, there are gel and mousse products on the market for soothing and cooling treatment after hair removal; although these products can alleviate the various discomfort symptoms caused by hair removal to a certain extent, their application method is relatively inconvenient, requiring manual application and use with cooling equipment in some cases, which increases the user's operation complexity and time cost.

[0004] Therefore, there is an urgent need for a soothing and cooling spray after hair removal and a preparation method thereof to solve the deficiencies of the existing technical problems. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a soothing and cooling spray after hair removal and a preparation method thereof. The spray is released in a convenient spray form and does not need to be applied by hand. Users only need to spray it lightly to enjoy the multiple effects of rapid cooling, moisturizing and soothing and repairing.

[0006] To achieve the above objectives, the first aspect of the present invention provides a soothing and cooling spray after hair removal, which comprises, by mass, 88 to 95 parts of water, 1 to 3 parts of preservatives, 0.3 to 0.6 parts of moisturizers, 0.3 to 1 parts of skin conditioners, 0.1 to 0.4 parts of skin protectants, 0.01 to 0.7 parts of fragrances, and 0.03 parts of chelating agents; moisturizers include erythritol, PPG-13-decyltetradecyl alcohol polyether-24 and vitamin E; skin conditioners include aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract; skin protectants include allantoin, caprylic / capric triglyceride, and polyglycerol-6.

[0007] Compared with the prior art, the beneficial effects of the soothing and cooling spray after hair removal of the present invention are as follows:

[0008] 1. After hair removal, the skin will have a burning irritation reaction. The present invention uses high-content (88-95 parts) water as the main raw material. A large amount of water evaporates quickly after being sprayed on the skin, taking away the heat, having a rapid cooling effect, and reducing the discomfort after hair removal. In addition, the high content of water significantly reduces the overall viscosity of the formula, and low-viscosity liquids are more likely to form small, uniform droplets through the nozzle, thereby achieving uniform coverage.

[0009] 2. After hair removal, the skin itself tends to become dry, and the high water content will also take away the natural oil and moisture on the skin surface during rapid evaporation, thereby exacerbating the dryness problem; based on this, this application also introduces a moisturizer including erythritol, PPG-13-decyltetradecanol polyether-24 and vitamin E. Erythritol quickly forms a moisturizing layer on the skin surface, instantly increasing the skin's moisture content; PPG-13-decyltetradecanol polyether-24 promotes the deep penetration of other ingredients to ensure moisturizing effects; and vitamin E deeply repairs the skin barrier, provides antioxidant protection and reduces water loss. Therefore, the moisturizer not only provides immediate surface moisturizing, but also enhances the skin's self-repair ability, effectively alleviating the immediate dryness problem after hair removal.

[0010] 3. In order to ensure that the skin remains hydrated under external environmental factors, the present application also introduces a skin protectant including allantoin, caprylic / capric triglyceride, and polyglycerol-6 to further enhance the moisturizing and nourishing effects. Allantoin softens the stratum corneum, promotes skin cell renewal, enhances the skin barrier function, and provides deep moisturizing and repair; caprylic / capric triglyceride forms a light and non-greasy protective film on the skin surface, effectively preventing moisture evaporation while providing additional moisturizing to the skin; polyglycerol-6 enhances the stability of the formula, allowing other ingredients to be more evenly distributed and absorbed by the skin, so the skin protectant also provides deep moisturizing and nourishing to help the skin restore and maintain a good moisture balance.

[0011] 4. After hair removal, the skin will also have itchy and red irritation reactions. In order to alleviate this discomfort reaction after hair removal, this application also introduces a skin conditioner including five ingredients: aloe vera extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract. Among them, aloe vera extract and purslane extract can quickly calm the skin, relieve the redness and discomfort after hair removal, and provide immediate sedative and anti-inflammatory effects; chamomile extract can further relieve skin sensitivity with its excellent soothing properties; witch hazel distillate is used to regulate sebum secretion and keep the skin fresh and oily; alpine scutellaria extract is rich in antioxidant ingredients, effectively neutralizes free radicals, protects the skin from damage by environmental factors, and promotes long-term health of the skin. Therefore, using these five natural extracts as skin conditioners not only provides immediate soothing and repair, but also enhances the overall defense ability of the skin.

[0012] 5. The spray of the present invention is released in a convenient spray form without the need for hand application, which is particularly suitable for immediate care of sensitive skin after hair removal, avoiding bacterial contamination or further irritation that may be caused by hand contact. Users only need to spray lightly to enjoy the multiple effects of rapid cooling, moisturizing and soothing repair, which greatly improves the convenience and comfort of use.

[0013] Furthermore, the preservative of the present invention is at least one selected from p-hydroxyacetophenone, caprylyl glycol and isoprene glycol.

[0014] Furthermore, the fragrance of the present invention is selected from at least one of rosemary essence, mint essence, lemon essence, lavender essential oil, tea tree essential oil and rose essential oil.

[0015] Furthermore, the chelating agent of the present invention is at least one of ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na). EDTA-4Na has higher solubility, is more suitable for products with high water content, and provides better stability.

[0016] Furthermore, the mass ratio of erythritol, PPG-13-decyltetradecanol polyether-24 and vitamin E of the present invention is 1-3:1-2:1-2.

[0017] Furthermore, the mass ratio of the aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract of the present invention is 2.8-3.2:2.9-3.0:1.8-2.2:2.8-3.2:1.7-2.1. Preferably, the mass ratio of the aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract is 3:3:2:3:2.

[0018] Furthermore, the mass ratio of allantoin, caprylic / capric triglyceride and polyglycerol-6 (cas: 36675-34-0) of the present invention is 1-2:1-3:0.5-1.5.

[0019] To achieve the above objectives, the second aspect of the present invention further provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0020] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0021] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0022] S3, mixing the formulated amounts of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, and heating and stirring to prepare a third phase;

[0023] S4, cooling the third phase, adding the second phase, and stirring evenly to obtain the fourth phase;

[0024] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0025] S6. Fill the liquid into the bag valve, seal it, fill it with compressed gas, and install a nozzle to obtain a soothing and cooling spray after hair removal.

[0026] Compared with the prior art, the present invention pre-mixes erythritol, vitamin E and witch hazel distillate in step S1 to ensure that these sensitive ingredients are fully dissolved and stably present under mild conditions, avoiding damage to them by high temperature or long-term stirring. In step S2, PPG-13-decyl tetradecyl alcohol polyether-24, fragrance and caprylic / capric triglyceride are pre-mixed to form a stable oil phase to ensure the uniform distribution of oil-soluble components. In step S3, water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6 and preservative are mixed under heating conditions to fully dissolve and stably present water-soluble components. In step S4, the second phase is added after the third phase is cooled to avoid high temperature damage to sensitive components, and a stable emulsion system is formed by stirring. In step S5, the first phase is finally added to ensure that it is evenly distributed throughout the formula. Therefore, the preparation method of the present invention significantly improves the stability and efficacy of the product by limiting the order and processing conditions of adding each substance.

[0027] Furthermore, the heating temperature in S3 of the present invention is 83° C. to 85° C. For example, the heating temperature may be, but is not limited to, 83° C., 84° C., or 85° C.

[0028] Furthermore, S4 of the present invention comprises cooling the third phase to 35°C to 45°C. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The raw materials used in the embodiments and comparative examples were all purchased from the market, such as aloe vera extract purchased from Shanghai Zhongfeng Biotechnology Co., Ltd.; purslane extract purchased from Shanyang Lianfeng Biotechnology Co., Ltd.; chamomile extract purchased from Fufeng Snot Biotechnology Co., Ltd.; witch hazel distillate purchased from Wuhan Kemik Biomedicine Technology Co., Ltd.; alpine scutellaria extract purchased from Guangzhou Kosaru Trading Co., Ltd.; oat extract purchased from Fufeng Snot Biotechnology Co., Ltd.

[0031] Example 1

[0032] The present embodiment provides a soothing and cooling spray after hair removal, which includes, by mass, 91 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizer includes erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a mass ratio of 2:2:1; the skin conditioner includes aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a mass ratio of 3:3:2:3:2; the skin protectant includes allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a mass ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0033] This embodiment provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0034] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0035] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0036] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0037] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0038] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0039] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0040] Example 2

[0041] The present embodiment provides a soothing and cooling spray after hair removal, which includes, by mass, 94 parts of water, 1 part of a preservative, 0.5 parts of a moisturizer, 0.7 parts of a skin conditioner, 0.2 parts of a skin protectant, 0.1 parts of a fragrance, and 0.03 parts of a chelating agent; the moisturizer includes erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a mass ratio of 3:1.5:1; the skin conditioner includes aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a mass ratio of 3.1:3:2:2.9:1.8; the skin protectant includes allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a mass ratio of 2:1:0.5; the chelating agent is disodium ethylenediaminetetraacetic acid; the fragrance is lavender essential oil; and the preservative is caprylyl glycol.

[0042] This embodiment provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0043] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0044] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0045] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 83° C., and stirring evenly to obtain a third phase;

[0046] S4, cooling the third phase to 40°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0047] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0048] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0049] Example 3

[0050] The present embodiment provides a soothing and cooling spray after hair removal, which includes, by mass, 88 parts of water, 1.4 parts of preservatives, 0.6 parts of moisturizers, 0.8 parts of skin conditioners, 0.3 parts of skin protectants, 0.04 parts of fragrances, and 0.03 parts of chelating agents; the moisturizer includes erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a mass ratio of 2:1.8:1.5; the skin conditioner includes aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a mass ratio of 3:2.9:1.8:3:2; the skin protectant includes allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a mass ratio of 2:1.7:0.7; the chelating agent is disodium ethylenediaminetetraacetic acid; the fragrance is rose essential oil; and the preservative is isopentyl glycol.

[0051] This embodiment provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0052] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0053] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0054] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 84° C., and stirring evenly to obtain a third phase;

[0055] S4, cooling the third phase to 37° C., adding the second phase, and stirring evenly to obtain the fourth phase;

[0056] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0057] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0058] Comparative Example 1

[0059] The comparative example provides a soothing and cooling spray after hair removal, which comprises, by weight, 80 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers comprise erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a weight ratio of 2:2:1; the skin conditioners comprise aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a weight ratio of 3:3:2:3:2; the skin protectants comprise allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a weight ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0060] This comparative example provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0061] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0062] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0063] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0064] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0065] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0066] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0067] Comparative Example 2

[0068] The comparative example provides a soothing and cooling spray after hair removal, which comprises, by weight, 91 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizer comprises erythritol, PPG-15 stearyl alcohol ether (cas: 25231-21-4), and vitamin E in a mass ratio of 2:2:1; the skin conditioner comprises aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a mass ratio of 3:3:2:3:2; the skin protectant comprises allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a mass ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0069] This comparative example provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0070] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0071] S2, mixing the formulated amounts of PPG-15 stearyl alcohol ether, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0072] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0073] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0074] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0075] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0076] Comparative Example 3

[0077] The comparative example provides a soothing and cooling spray after hair removal, which comprises, by weight, 91 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers comprise erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a weight ratio of 2:2:1; the skin conditioners comprise aloe extract, oat extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a weight ratio of 3:3:2:3:2; the skin protectants comprise allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a weight ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0078] This comparative example provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0079] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0080] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0081] S3, mixing the formulated amount of water, chelating agent, aloe extract, oat extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0082] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0083] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0084] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0085] Comparative Example 4

[0086] The comparative example provides a soothing and cooling spray after hair removal, which comprises, by weight, 91 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers comprise erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a weight ratio of 2:2:1; the skin conditioners comprise purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract in a weight ratio of 3:2:3:2; the skin protectants comprise allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a weight ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0087] This comparative example provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0088] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0089] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0090] S3, mixing the formulated amount of water, chelating agent, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0091] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0092] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0093] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0094] Comparative Example 5

[0095] The comparative example provides a soothing and cooling spray after hair removal, which comprises, by weight, 91 parts of water, 2 parts of preservatives, 0.4 parts of moisturizers, 0.5 parts of skin conditioners, 0.3 parts of skin protectants, 0.2 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers comprise erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E in a weight ratio of 2:2:1; the skin conditioners comprise aloe extract, purslane extract, witch hazel distillate, and alpine scutellaria extract in a weight ratio of 3:3:3:2; the skin protectants comprise allantoin, caprylic / capric triglyceride, and polyglycerol-6 in a weight ratio of 2:1.5:1; the chelating agent is tetrasodium ethylenediaminetetraacetic acid; the fragrance is rosemary essence; and the preservative is p-hydroxyacetophenone.

[0096] This comparative example provides a method for preparing a soothing and cooling spray after hair removal, the steps comprising:

[0097] S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase;

[0098] S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase;

[0099] S3, mixing the formulated amount of water, chelating agent, aloe extract, purslane extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, heating to 85° C., and stirring evenly to obtain a third phase;

[0100] S4, cooling the third phase to 45°C, adding the second phase, and stirring evenly to obtain the fourth phase;

[0101] S5, adding the first phase into the fourth phase, stirring evenly to obtain a liquid feed;

[0102] S6. Fill the bag valve with the liquid, seal it and fill it with 0.75MPa nitrogen. After the water bath test is qualified, install the nozzle to obtain a soothing and cooling spray after hair removal.

[0103] The rapid cooling, moisturizing and soothing repair effects of the soothing and cooling sprays after hair removal of Examples 1 to 3 and Comparative Examples 1 to 5 were tested according to the following test methods:

[0104] Rapid cooling effect test:

[0105] A total of 80 subjects aged between 25 and 30 were selected and divided into 8 groups, with 10 subjects in each group. All subjects used a unified standard hair removal method to treat the inner thighs of both sides; infrared thermal imaging technology was used to measure the skin surface temperature; the skin surface temperature was tested before spraying and 2 minutes after spraying, and the temperature change was calculated as temperature before spraying - temperature 2 minutes after spraying, and then the average temperature change was calculated. The average temperature change results are shown in Table 1.

[0106] Moisturizing effect test:

[0107] 80 subjects aged between 25 and 30 were selected and divided into 8 groups, with 10 subjects in each group. All subjects used a unified standard hair removal method to treat the inner thighs of both sides; the moisture content (%) of the stratum corneum of the skin was measured using a Corneometer CM825 skin moisture tester; the moisture content of the stratum corneum of the skin was measured before spraying and 30 minutes after spraying, and then the change in moisture content was calculated to evaluate the moisturizing effect. Moisture content change = moisture content 30 minutes after spraying - moisture content before spraying, and the moisture content change rate results are shown in Table 1.

[0108] Soothing and repairing effect test:

[0109] 80 subjects aged between 25 and 30 were selected and divided into 8 groups, with 10 people in each group. All subjects used a unified standard hair removal method to treat the inner thighs on both sides, and immediately used spray after hair removal. After 8 hours of use, the product efficacy was evaluated using a scoring system, with the improvement of various symptoms (including tingling, burning, redness and swelling) as the full score of 10. The higher the score, the better the soothing and repairing effect. The average score was calculated, and the average score of each symptom was calculated to calculate the comprehensive effect of the statistical sample. The test results are shown in Table 2.

[0110] Table 1

[0111]

[0112]

[0113] Table 2

[0114] Group Tingling sensation Burning sensation Redness and swelling Overall Rating Example 1 9.1 9.3 9.2 9.2 Example 2 9.0 9.2 8.8 9.0 Example 3 8.9 9.0 8.9 8.9 Comparative Example 1 8.8 8.2 8.4 8.5 Comparative Example 2 9.0 9.0 8.5 8.8 Comparative Example 3 8.5 8.6 8.1 8.4 Comparative Example 4 8.0 8.2 7.8 8.0 Comparative Example 5 7.8 8.0 7.5 7.8

[0115] By comparing Example 1 with Comparative Example 1, it can be seen that high water content helps to quickly cool down, and rapid cooling can reduce local blood flow by constricting blood vessels, thereby alleviating inflammation and swelling, and further helping to achieve a better soothing and repairing effect.

[0116] Comparing Example 1 with Comparative Example 2, it can be seen that the moisturizing effect of Example 1 is better than that of Comparative Example 2. This is because although PPG-15 stearyl alcohol ether also has a certain moisturizing effect, its molecular structure is relatively simple and mainly consists of a shorter polypropylene glycol chain and stearyl alcohol, which limits its ability to absorb moisture and spread on the skin, that is, it tends to provide a closure effect rather than actively absorb moisture or promote the penetration of other ingredients. The PPG-13-decyltetradecyl alcohol polyether-24 of the present application includes a longer alkyl chain and multiple ethylene oxide units, which allows it to better interact with lipids in the stratum corneum of the skin, thereby improving the penetration of active ingredients.

[0117] By comparing Example 1 and Comparative Example 3, it can be seen that after the purslane extract is adjusted to oat extract, the soothing and repairing effect of the product is significantly weakened. This may be because the purslane extract and the aloe vera gel extract cooperate with each other to further enhance the soothing and repairing ability of the product in the scenarios of rapid sedation and anti-inflammatory. Although the oat extract helps to repair the skin barrier function, in specific application scenarios that require rapid sedation and anti-inflammatory, its combination effect with aloe vera gel extract is not as good as that of purslane extract.

[0118] By comparing Example 1 with Comparative Examples 4-5, it can be seen that the removal of aloe vera extract or chamomile extract will significantly weaken the soothing and repairing effect of the product. This is because aloe vera extract and purslane extract can quickly calm the skin, relieve the redness and discomfort after hair removal, and provide immediate calming and anti-inflammatory effects; while chamomile extract can further relieve skin sensitivity with its excellent soothing properties; that is, the presence of these two extracts in the formula is also crucial to ensure that the product achieves the best soothing and repairing effect.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A soothing and cooling spray after hair removal, characterized in that: The invention comprises, by mass, 88 to 95 parts of water, 1 to 3 parts of preservatives, 0.3 to 0.6 parts of moisturizers, 0.3 to 1 parts of skin conditioners, 0.1 to 0.4 parts of skin protectants, 0.01 to 0.7 parts of fragrances, and 0.03 parts of chelating agents; the moisturizers comprise erythritol, PPG-13-decyltetradecyl alcohol polyether-24, and vitamin E; the skin conditioners comprise aloe extract, purslane extract, chamomile extract, witch hazel distillate, and alpine scutellaria extract; the skin protectants comprise allantoin, caprylic / capric triglyceride, and polyglycerol-6.

2. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The preservative is selected from at least one of p-hydroxyacetophenone, caprylyl glycol and isoprene glycol.

3. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The fragrance is selected from at least one of rosemary essence, mint essence, lemon essence, lavender essential oil, tea tree essential oil and rose essential oil.

4. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The chelating agent is at least one of disodium ethylenediaminetetraacetic acid and tetrasodium ethylenediaminetetraacetic acid.

5. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The mass ratio of the erythritol, the PPG-13-decyltetradecanol polyether-24 and the vitamin E is 1-3:1-2:1-2.

6. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The mass ratio of the aloe extract, the purslane extract, the chamomile extract, the witch hazel distillate, and the alpine scutellaria extract is 2.8-3.2:2.9-3.0:1.8-2.2:2.8-3.2:1.7-2.

1.

7. The soothing and cooling spray after hair removal according to claim 1, characterized in that: The mass ratio of the allantoin, the caprylic / capric triglyceride and the polyglycerol-6 is 1-2:1-3:0.5-1.

5.

8. A method for preparing the soothing and cooling spray after hair removal according to any one of claims 1 to 7, characterized in that the steps include: S1, stirring and mixing the formulated amounts of erythritol, vitamin E, and witch hazel distillate to prepare a first phase; S2, mixing the formulated amount of PPG-13-decyltetradecyl alcohol polyether-24, fragrance, and caprylic / capric triglyceride to prepare a second phase; S3, mixing the formulated amounts of water, chelating agent, aloe extract, purslane extract, chamomile extract, alpine scutellaria extract, allantoin, polyglycerol-6, and preservative, and heating and stirring to prepare a third phase; S4, cooling the third phase, adding the second phase, and stirring evenly to obtain the fourth phase; S5, adding the first phase material into the fourth phase material, stirring evenly to obtain a feed liquid; S6, filling the material liquid into the bag valve, sealing it, filling it with compressed gas, and installing a nozzle to obtain a soothing and cooling spray after hair removal.

9. The method for preparing the soothing and cooling spray after hair removal according to claim 8, characterized in that: The heating temperature in S3 is 83°C to 85°C.

10. The method for preparing the soothing and cooling spray after hair removal according to claim 8, characterized in that: S4 includes cooling the temperature of the third phase to 35°C to 45°C.

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