A spray type skin care emulsion and a preparation method and application thereof

Abstract

The present application belongs to the technical field of cosmetics, and particularly relates to a spray type skin care emulsion and a preparation method and application thereof. The skin care emulsion comprises the following components in mass percentage: white pool flower seed oil 0.5-2%, panthenol 0.1-1.5%, gynostemma extract 0.01-0.15%, glycyrrhizic acid dipotassium 0.1-1%, humectant 2.1-21.5%, emulsifier 0.1-1%, chelating agent 0.01-0.15%, preservative 0.11-1.6%, and the rest is aloe vera water. The white pool flower seed oil, panthenol and other components are compounded to prepare the spray type emulsion, the components cooperate with each other to effectively improve the atomization effect of the spray by reducing the surface tension of the emulsion, so that the spray can more widely and finely cover the skin, and the active ingredients will interact to synergistically enhance the soothing and repairing effect of the emulsion.

Description

Technical Field

[0001] The present invention belongs to the technical field of cosmetics, and in particular relates to a spray-type skin care lotion and a preparation method and application thereof. Background Art

[0002] Spray-based cosmetics are a new skincare product that has become popular in recent years. Simply pressing the nozzle sprays the product onto the face, achieving the desired effect. These sprays are easy to use and avoid the secondary contamination associated with direct contact with the product's contents. Compared to traditional topical skincare products, sprays offer advantages such as reduced dosage, even application, and a clean, non-sticky feel, minimizing secondary contamination. These sprays are widely popular in the cosmetics market.

[0003] However, many common spray products on the market have problems such as small spray angles and large atomized droplets, which may lead to uneven spraying, low coverage, and the product easily gathering into water droplets on the skin, affecting consumers' usage experience and results. In addition, existing sprays generally only have simple moisturizing effects, and rarely have soothing and repairing effects. Existing sprays are generally transparent water-based systems, which cannot maintain excellent atomization effects while adding oil-soluble raw materials and active ingredients. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a spray-type skin care lotion and its preparation method and application, so as to achieve good atomization effect while providing excellent soothing and repairing effects, and meet consumers' needs for multifunctional care.

[0005] To achieve the above objectives, the technical solutions adopted by the present invention include:

[0006] In a first aspect, the present invention provides a spray-type skin care lotion, comprising the following components in percentage by mass: 0.5-2% of meadowfoam seed oil, 0.1-1.5% of panthenol, 0.01-0.15% of Centella asiatica extract, 0.1-1% of dipotassium glycyrrhizate, 2.1-21.5% of moisturizer, 0.1-1% of emulsifier, 0.01-0.15% of chelating agent, 0.11-1.6% of preservative and the balance of aloe barbadensis leaf water.

[0007] Meadowfoam seed oil, as an oil-soluble ingredient, is rich in fatty acids, which can improve the skin barrier and help oil-soluble ingredients to be stably dispersed in the aqueous phase, reduce the surface tension at the water-oil interface, and promote the stability and atomization effect of the emulsion; panthenol has good hydrophilicity, which can help water-soluble ingredients and oil-soluble ingredients to better blend and improve the skin permeability of the product. It can also help reduce the droplet size during spraying by changing the viscosity of the solution; Centella asiatica extract and dipotassium glycyrrhizate are active ingredients that participate in skin repair. At the same time, their stability in the emulsion is related to the surface tension of the formula. By helping the ingredients in the emulsion to be more evenly distributed, it helps to improve the uniformity of the spray.

[0008] Experimental research found that the present invention uses white meadowfoam seed oil, panthenol and other components to compound within a preferred dosage range to prepare a spray-type emulsion. The components cooperate with each other to effectively improve the atomization effect of the spray by reducing the surface tension of the emulsion. The spray droplets become smaller and the atomization is more uniform, thereby ensuring that the spray can cover the skin more widely and finely, avoiding the liquid droplet aggregation phenomenon commonly seen in traditional sprays.

[0009] In addition, meadowfoam seed oil has anti-inflammatory and antioxidant properties, which can complement the anti-inflammatory and soothing effects of panthenol, Centella asiatica extract and dipotassium glycyrrhizate. The four active ingredients interact with each other to synergistically enhance the soothing and repairing effect of the emulsion. In addition, aloe barbadensis leaf water has natural moisturizing and calming effects, which can further reduce skin irritation and inflammation during the skin repair process, enhance the effect of the soothing and repairing active ingredients, and enable the emulsion to achieve excellent soothing and repairing effects.

[0010] Preferably, the skin care lotion comprises the following components in percentage by mass: 1-2% of meadowfoam seed oil, 0.1-1% of panthenol, 0.01-0.1% of Centella asiatica extract, 0.1-0.5% of dipotassium glycyrrhizate, 3.1-11% of moisturizer, 0.1-0.5% of emulsifier, 0.01-0.1% of chelating agent, 0.11-1.05% of preservative and the balance of aloe barbadensis leaf water.

[0011] Preferably, the skin care lotion comprises the following components in percentage by mass: 1.5% of meadowfoam seed oil, 0.5% of panthenol, 0.1% of Centella asiatica extract, 0.5% of dipotassium glycyrrhizate, 7.5% of moisturizer, 0.25% of emulsifier, 0.05% of chelating agent, 0.65% of preservative and the balance of aloe barbadensis leaf water.

[0012] Through experimental research, it was found that when the components of the present invention are combined using the optimal dosage ratio specified above, the spray effect of the spray-type skin care lotion is optimal, and the particle size of the system is ≤200nm, which significantly improves the penetration efficiency of the lotion on the skin, and the lotion has multiple functions of excellent moisturizing, instant soothing, and long-lasting repair.

[0013] Preferably, the humectant comprises 1,3-butanediol, 1,3-propanediol and glycerol, and the mass ratio of the 1,3-butanediol, 1,3-propanediol and glycerol is (1-10):(0.1-1.5):(1-10).

[0014] Preferably, the mass ratio of the 1,3-butanediol, 1,3-propanediol and glycerol is (1-5):(0.1-1):(2-5).

[0015] More preferably, the mass ratio of the 1,3-butanediol, 1,3-propanediol and glycerol is 3:0.5:4.

[0016] Preferably, the preservative comprises caprylhydroxamic acid and 1,2-hexanediol, and the mass ratio of the caprylhydroxamic acid and 1,2-hexanediol is (0.01-0.1):(0.1-1.5).

[0017] Preferably, the mass ratio of the caprylhydroxamic acid and 1,2-hexanediol is (0.01-0.05):(0.1-1).

[0018] More preferably, the mass ratio of the caprylhydroxamic acid and 1,2-hexanediol is 0.05:0.6.

[0019] Preferably, the emulsifier comprises polyglyceryl-10 oleate; and / or, the chelating agent comprises disodium EDTA.

[0020] In a second aspect, the present application provides a preparation method of the skin care emulsion, comprising the following steps:

[0021] S1, mixing 1,3-butanediol, 1,3-propanediol, chelating agent and aloe vera leaf water, heating to 85-90℃, stirring and mixing for 10-15min to obtain mixture A;

[0022] S2, adding panthenol to the aloe vera leaf water, heating to 45-55℃, stirring and mixing for 5-10min to obtain mixture B;

[0023] S3, adding an emulsifier to glycerol, heating to 70-80℃, stirring and mixing for 10-15min until dissolved, then adding white pool flower seed oil, stirring and mixing uniformly to obtain mixture C;

[0024] S4, adding asiaticoside extract and potassium glycyrrhizinate to the aloe vera leaf water, stirring and mixing for 10-15min to obtain mixture D;

[0025] S5. When the mixture A is cooled to 55-60° C., a preservative is added, and the mixture is stirred and mixed for 10-15 minutes. The mixture is cooled to 45-50° C., and mixtures B, C, and D are added, and the mixture is stirred and mixed for 15-20 minutes until the mixture is uniform, thereby obtaining the skin care lotion.

[0026] In a third aspect, the present invention provides use of the skin care emulsion in cosmetics.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention uses white meadowfoam seed oil, panthenol and other components to prepare a spray-type emulsion in a preferred dosage range. The components cooperate with each other to effectively improve the atomization effect of the spray by reducing the surface tension of the emulsion. The spray droplets become smaller and the atomization is more uniform, thereby ensuring that the spray can cover the skin more widely and finely, improving the moisturizing effect and absorption speed of the emulsion while avoiding the common liquid droplet aggregation phenomenon in traditional sprays;

[0029] (2) The anti-inflammatory and soothing effects of the white meadowfoam seed oil, panthenol, Centella asiatica extract, and dipotassium glycyrrhizate of the present invention complement each other. The four active ingredients interact with each other, thereby synergistically enhancing the soothing and repairing effect of the lotion. In addition, the aloe vera leaf water has a natural moisturizing and calming effect, thereby further reducing skin irritation and inflammation during the skin repair process, enhancing the effect of the soothing and repairing active ingredients, and making the lotion have multiple effects of excellent moisturizing, instant soothing, and long-lasting repair.

[0030] (3) The final particle size of the skin care lotion of the present invention is ≤200 nm, which significantly improves the penetration efficiency of the lotion on the skin. In addition, the present invention adopts a binary spray packaging, which does not bring out the propellant when the lotion is sprayed, thereby reducing the pollution of the propellant and the irritation to the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the appearance of the skin care lotion prepared in Example 1;

[0032] Figure 2 This is the particle size and light intensity distribution diagram of the skin care lotion prepared in Example 1. DETAILED DESCRIPTION

[0033] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Unless otherwise specified, all raw materials involved in the following examples and comparative examples are commercially available general materials.

[0035] Examples 1-5

[0036] Examples 1-5 of the present invention provide a spray-type skin care lotion, the specific formula of which is shown in Table 1. The preparation method of the skin care lotion comprises the following steps:

[0037] S1. Mix 1,3-butanediol, 1,3-propylene glycol, a chelating agent, and aloe vera leaf water, heat to 85-90° C., and stir for 10-15 minutes to obtain a mixture A;

[0038] S2. Add panthenol to aloe vera leaf water, heat to 45-55° C., and stir for 5-10 minutes to obtain a mixture B;

[0039] S3, adding an emulsifier to glycerin, heating to 70-80° C., stirring and mixing for 10-15 minutes until dissolved, then adding meadowfoam seed oil, stirring and mixing until uniform, to obtain a mixture C;

[0040] S4. Add the Centella asiatica extract and dipotassium glycyrrhizate to the Aloe barbadensis leaf water, and stir for 10-15 minutes to obtain a mixture D;

[0041] S5. When the mixture A is cooled to 55-60° C., a preservative is added, and the mixture is stirred and mixed for 10-15 minutes. The mixture is cooled to 45-50° C., and mixtures B, C, and D are added, and the mixture is stirred and mixed for 15-20 minutes until the mixture is uniform, thereby obtaining the skin care lotion.

[0042] Table 1 Formulation of the skin care lotion described in Examples 1-5 (mass percentage)

[0043]

[0044] Comparative Examples 1-6

[0045] The present invention also provides the formulas of the spray-type skin care emulsions of Comparative Examples 1-6, as shown in Table 2. The preparation methods of the skin care emulsions provided in Comparative Examples 1-6 are similar to those of Examples 1-5, except that the formulas are different.

[0046] Table 2 Formula of the skin care lotion described in Comparative Examples 1-6 (mass percentage)

[0047]

[0048]

[0049] Comparative Example 7

[0050] This comparative example provides a skin care lotion, which differs from Example 1 only in that meadowfoam seed oil is replaced with grape seed oil, and the other components and contents are the same.

[0051] Comparative Example 8

[0052] This comparative example provides a skin care lotion, which differs from Example 1 only in that the Centella asiatica extract and dipotassium glycyrrhizate are replaced by Paeonia lactiflora root extract and niacinamide, respectively, and the other components and contents are the same.

[0053] Comparative Example 9

[0054] This comparative example provides a skin care lotion, which differs from Example 1 only in that the aloe vera leaf water is replaced with deionized water, and the other components and contents are the same.

[0055] Effect Examples

[0056] 1. Safety testing:

[0057] The skin care lotions prepared in Examples 1-5 and Comparative Examples 1-9 were used as samples to test their safety, and the specific method is as follows.

[0058] Test population: 30 people, 7 males and 23 females, aged 20-55 years. Volunteers must meet the selection criteria for human skin patch tests in the "Technical Specifications for Safety of Cosmetics" (2015 edition).

[0059] Test method: The skin care lotions prepared in Examples 1-5 and Comparative Examples 1-9 were patch tested. Qualified patch test equipment was selected and a closed patch test method was used. Approximately 0.020-0.025 ml of the test substance was placed in the patch tester. Medical tape was applied to the curved side of the subject's forearm. The test substance was lightly pressed with the palm of the hand to evenly apply it to the skin. The test substance patch tester was removed after 24 hours, and the skin reaction was observed 0.5, 24, and 48 hours after the removal of the test substance patch tester. The results were recorded according to the skin reaction grading standard in the "Technical Specification for Safety of Cosmetics" (2015 edition).

[0060] The results of the human skin patch test showed that there was no positive reaction among 30 people. According to the "Technical Specifications for Safety of Cosmetics" (2015 edition), the test substance will not cause adverse skin reactions and the sample is safe and non-irritating.

[0061] 2. Particle size test:

[0062] The skin care lotions prepared in Examples 1-5 and Comparative Examples 1-9 were placed in the same spray bottle as samples, and their atomization effects were tested. The specific method is as follows:

[0063] A laser diffraction particle size analyzer was used to test the mist particle size and distribution of the skin care lotions described in Examples 1-5 and Comparative Examples 1-9. Three bottles of each sample were tested. Turn on the instrument according to the operating procedures, select a suitable lens based on the sample conditions, and set the measurement parameters of the instrument. Measure the background after 15 minutes. Position the sample so that the center line of the spray mist number is in the same plane as the laser beam and remains perpendicular. Spray at different distances from the laser beam and check the light shielding rate of the sample. When the light shielding rate value reaches the range of 0.1-0.5, position the sample. Sample for 5 seconds each time the spray is taken and the results are measured. Test the second and third bottles of samples in turn according to the above method. The average value of the three test results is the mist particle VMD (volume average particle diameter) of the sample. The test results of the mist particle VMD are shown in Table 3.

[0064] Table 3

[0065] Sample source VDM (μm) Sample source VDM (μm) Example 1 28.29 Comparative Example 3 49.38 Example 2 38.17 Comparative Example 4 58.81 Example 3 35.45 Comparative Example 5 46.05 Example 4 34.68 Comparative Example 6 40.34 Example 5 32.12 Comparative Example 7 51.93 Comparative Example 1 55.84 Comparative Example 8 45.55 Comparative Example 2 50.27 Comparative Example 9 39.89

[0066] As shown in Table 3, the VDM of the skin care lotions prepared in Examples 1-5 of the present invention are all less than 40 μm, and the atomization effect is better. In particular, the VDM of the skin care lotion prepared in Example 1 reaches 28.29 μm, the spray angle is large, the dispersion effect is more obvious, and the atomized particles are uniform and small, thereby effectively ensuring that the spray can cover the skin more widely and finely, avoiding the phenomenon of liquid drop aggregation. When any one or two of the four active ingredients of white meadowfoam seed oil, panthenol, Centella asiatica extract and dipotassium glycyrrhizate are lacking in Comparative Examples 1-4, the atomization effect of the prepared skin care lotion is significantly reduced compared with the embodiment, especially when the atomization effect decreases most significantly when white meadowfoam seed oil is lacking, when the above four components are replaced with components with the same efficacy in Comparative Examples 7-8, the VDM value of the prepared skin care lotion is also increased. The above results show that the four active ingredients selected by the present invention will cooperate with each other, and can effectively improve the atomization effect of the emulsion spray by reducing the surface tension of the emulsion, making the atomization more uniform, and the four components are indispensable.

[0067] 3. Soothing effect test:

[0068] 140 subjects aged 20-55 years were selected. The subjects had no severe systemic diseases, no immunodeficiency or autoimmune diseases, and no history of allergies to skin care cosmetics. The subjects were divided into 14 groups, with 10 people in each group. The spray-type skin care emulsions described in Examples 1-5 and Comparative Examples 1-9 of the present invention were tested respectively. The specific method is as follows:

[0069] The subject sits quietly for 30 minutes in a constant temperature and humidity environment, where the temperature is 21±1℃ and the humidity is 40-60%. Mark the inner side of the subject's arm about 4 cm 2Area, draw 20 μL of 2% histamine solution on the marked area, apply it evenly and observe. The subjects with obvious redness and swelling within 20 minutes are qualified. Each group of 10 subjects applied histamine solution on their arms. When itching and slight redness and swelling occurred, the spray skin care lotion sample was sprayed on the red and swollen area through the same spray bottle for testing. Gently massage with hands until completely absorbed. Observe the changes in the skin at 10 minutes, 60 minutes and 90 minutes, and ask the subjects to score the soothing effect of the sample after 90 minutes, and take the average of the test scores of each group; among them, 9-10 points: very good soothing effect on itching and tingling, 7-8 points: good soothing effect on itching and tingling, 5-6 points: average soothing effect on itching and tingling, 3-4 points: poor soothing effect on itching and tingling, 1-2 points: very poor soothing effect on itching and tingling. The specific test results are shown in Table 4.

[0070] Table 4

[0071]

[0072] As shown in Table 4, the skin care lotion prepared by Example 1-5 has excellent soothing effect, can effectively reduce the itching and stinging sensation of the skin caused by stimulation, while repairing and maintaining the barrier function of the skin, and improving the moisturizing properties of the skin. When the comparative examples 1-4 lack any one or two of the four active ingredients of white meadowfoam seed oil, panthenol, Centella asiatica extract and dipotassium glycyrrhizate, the soothing effect of the skin care lotion significantly decreases, when the dosage ratio of the four active ingredients described in comparative examples 5-6 exceeds the limited range of the present invention, the soothing effect of the obtained skin care lotion is also weakened compared with the embodiment, indicating that the four components of the present invention can better play a synergistic effect within the scope of specific dosage, thereby maximizing the long-lasting soothing effect of the emulsion; in comparative example 9, aloe vera leaf water is replaced with ordinary deionized water, and the soothing effect of the skin care lotion also appears to be reduced, indicating that the present invention selects aloe vera leaf water as an emulsion base to further alleviate the irritation of the skin, enhances the effect of soothing active ingredients.

[0073] 4. Stability test:

[0074] The skin care emulsions prepared in Examples 1-5 were used as samples to test their stability. The specific method is as follows.

[0075] Internal control standards (3 months at 45±2°C and 3 months at -15±2°C) exceed national and light industry standards. Five high-low temperature cycles were performed: one cycle consisted of 24 hours at 45±2°C and 24 hours at -10±2°C. The results are shown in Table 5.

[0076] Table 5

[0077]

[0078] The results in Table 5 show that the skin care lotion prepared in the embodiment of the present invention did not show any stratification or discoloration under high temperature, low temperature and high and low temperature cycle conditions, and has strong physical and chemical stability. Figure 2 This is a particle size intensity distribution diagram of the skin care lotion prepared in Example 1 after being tested by a Malvern particle size analyzer. It can be seen from the figure that the particle size of the skin care lotion prepared by the present invention is ≤200nm, which can effectively improve the penetration effect of the lotion on the skin.

[0079] Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A spray-type skin care lotion, characterized in that: The skin care emulsion comprises the following components in percentage by mass: 1-2% of meadowfoam seed oil, 0.1-1% of panthenol, 0.01-0.1% of Centella asiatica extract, 0.1-0.5% of dipotassium glycyrrhizate, 3.1-11% of moisturizer, 0.1-0.5% of emulsifier, 0.01-0.1% of chelating agent, 0.11-1.05% of preservative and the balance of aloe barbadensis leaf water.

2. The skin care lotion according to claim 1, wherein The skin care lotion comprises the following components in percentage by weight: 1.5% of meadowfoam seed oil, 0.5% of panthenol, 0.1% of Centella asiatica extract, 0.5% of dipotassium glycyrrhizate, 7.5% of moisturizer, 0.25% of emulsifier, 0.05% of chelating agent, 0.65% of preservative and the balance of aloe barbadensis leaf water.

3. The skin care emulsion according to claim 1 or 2, wherein The moisturizing agent comprises 1,3-butylene glycol, 1,3-propylene glycol and glycerol, and the mass ratio of the 1,3-butylene glycol, 1,3-propylene glycol and glycerol is (1-10): (0.1-1.5): (1-10).

4. The skin care emulsion according to claim 3, wherein The mass ratio of the 1,3-butanediol, 1,3-propylene glycol and glycerol is (1-5): (0.1-1): (2-5).

5. The skin care emulsion according to claim 1 or 2, characterized in that The preservative comprises capryloylhydroxamic acid and 1,2-hexanediol, and the mass ratio of capryloylhydroxamic acid to 1,2-hexanediol is (0.01-0.1): (0.1-1.5).

6. The skin care emulsion according to claim 1 or 2, wherein The emulsifier includes polyglyceryl-10 oleate; and / or the chelating agent includes disodium EDTA.

7. The method for preparing the skin care emulsion according to claim 3, wherein The following steps are involved: S1. Mix 1,3-butanediol, 1,3-propylene glycol, a chelating agent, and aloe vera leaf water, heat to 85-90° C., and stir for 10-15 minutes to obtain a mixture A; S2. Add panthenol to aloe vera leaf water, heat to 45-55° C., and stir for 5-10 minutes to obtain a mixture B; S3, adding an emulsifier to glycerin, heating to 70-80° C., stirring and mixing for 10-15 minutes until dissolved, then adding meadowfoam seed oil, stirring and mixing until uniform, to obtain a mixture C; S4. Add the Centella asiatica extract and dipotassium glycyrrhizate to the Aloe barbadensis leaf water, and stir for 10-15 minutes to obtain a mixture D; S5. When the mixture A is cooled to 55-60° C., a preservative is added, and the mixture is stirred and mixed for 10-15 minutes. The mixture is cooled to 45-50° C., and mixtures B, C, and D are added, and the mixture is stirred and mixed for 15-20 minutes until the mixture is uniform, thereby obtaining the skin care lotion.

8. Use of the skin care emulsion according to any one of claims 1 to 6 in cosmetics.

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