Foam type mosquito repellent and preparation method thereof

Abstract

The application discloses a foam type mosquito repellent liquid and a preparation method thereof, and comprises the following components: a mosquito repellent active ingredient, a surfactant, a plant extract and an emollient; the mosquito repellent active ingredient comprises at least one of repellent ester, menthol and hydroxyphthalate; the surfactant comprises at least one of stearic acid, lecithin, alkyl glucoside and AES; and the emollient comprises at least one of sodium hyaluronate, glycerol polyoxyethylene ether and sorbitol. The foam type mosquito repellent liquid of the application is synergistic through the components, so that the foam mosquito repellent liquid effectively repels mosquitoes, and the mosquito repellent effect of the mosquito repellent liquid under the condition of uneven application on the skin can be effectively improved when used.

Description

Technical Field

[0001] This invention relates to the field of daily necessities technology, and in particular to a foam-type mosquito repellent liquid and its preparation method. Background Technology

[0002] Currently, mosquito repellent methods are broadly categorized into physical and chemical methods. Among chemical repellents, liquid mosquito repellents are favored for their convenience, safety, high efficiency, and significant mosquito-repelling effects. Liquid mosquito repellents on the market are generally divided into two types: those containing mosquito-repellent ingredients (DEET, IR3535, picaridin, methylphenidate) and those containing plant-based ingredients (plant essential oils). The protective effect of mosquito repellents on humans primarily lies in blocking the insects' olfactory system, thus preventing mosquitoes from finding the human body. These products are mostly applied by spraying onto exposed skin. However, when applying by spraying, some active ingredients are initially lost into the air due to airflow, significantly reducing their effectiveness. In most cases, these products are simply sprayed directly onto the skin without even application, resulting in uneven contact with the effective repellent ingredients. This can lead to areas like the collar or trouser legs being left untreated and bitten, making the mosquito repellent less effective.

[0003] Therefore, developing a mosquito repellent liquid that is highly effective when applied unevenly is an urgent task. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a foam-type mosquito repellent and its preparation method. The components of the foam-type mosquito repellent of this invention work synergistically to effectively repel mosquitoes. The foam-type mosquito repellent of this invention is rich in foam, which can effectively enhance the mosquito repellent effect when the mosquito repellent is unevenly applied to the skin.

[0005] According to a first aspect of the present invention, a foam-type mosquito repellent liquid is provided, comprising the following components: a mosquito repellent active ingredient, a surfactant, a plant extract, and a moisturizer;

[0006] The mosquito-repellent active ingredient includes at least one of DEET, methylbenzyl glycol, and hydroxymethylbenzyl ester;

[0007] The surfactant includes at least one of stearic acid, lecithin, sodium fatty acid sulfate, alkyl glucoside, and AES;

[0008] The emollient includes at least one of sodium hyaluronate, glyceryl polyoxyethylene ether, and sorbitol.

[0009] The main function of the mosquito-repellent active ingredient is to block the insect's olfactory system, preventing mosquitoes from finding the human body and thus achieving the purpose of repelling mosquitoes. Adding plant extracts can effectively repel mosquitoes and create a synergistic effect with the active ingredient, thereby enhancing the efficacy of the mosquito repellent. The structure of the emollient in this invention can reduce transdermal absorption rate, thereby prolonging the protective time of the mosquito repellent.

[0010] According to some embodiments of the present invention, the foam-type mosquito repellent liquid comprises the following components by weight: 5-10 parts of IR353-DE4, 2-5 parts of surfactant, 0.05-3 parts of emollient, and 0.2-5 parts of plant extract.

[0011] In this invention, the foaming performance, foam persistence, and mosquito-repelling effect of the foam mosquito repellent are directly related to the components and their proportions. The foaming performance of the foam mosquito repellent determines the texture of the foam and the user experience after application; the foam persistence is crucial. If the foam persists for too long, the mosquito repellent is difficult to spread; if it persists for too short a time, it easily drips. The foam mosquito repellent at the specified weight percentages is both long-lasting and easy to spread. In this invention, the mosquito-repelling active ingredients are encapsulated within the foam structure in a slow-release manner. When applied to the skin, the active ingredients are gradually released and form a protective layer. Even if the application is uneven, the unapplied areas may still experience a mosquito-repelling effect through the diffusion effect of the active ingredients. The addition of surfactants to the foam mosquito repellent improves component adhesion. Even if the application is uneven, the surfactants help the coating adhere better to the skin to achieve a mosquito-repelling effect.

[0012] According to some embodiments of the present invention, the foam-type mosquito repellent liquid further includes the following components by weight: solvent, cooling agent and water.

[0013] According to some embodiments of the present invention, the foam-type mosquito repellent liquid comprises the following components by weight: 5-10 parts of IR3535, 10-30 parts of solvent and 0.05-0.1 parts of cooling agent.

[0014] According to some embodiments of the present invention, the plant extract includes at least one of melaleuca oil, tomato essential oil and cornelian cherry essential oil.

[0015] According to some embodiments of the present invention, the weight ratio of the tea tree oil, the tomato essential oil and the cornelian cherry essential oil is 1-2:1-2:1-20.

[0016] According to some embodiments of the present invention, the weight ratio of the melaleuca oil, the tomato essential oil and the cornelian cherry essential oil is 1:2:1.

[0017] According to some embodiments of the present invention, the solvent includes at least one selected from 1,3-butanediol, propylene glycol, and hexanediol.

[0018] According to some embodiments of the present invention, the cooling agent includes at least one of menthol, menthol, and borneol.

[0019] According to some embodiments of the present invention, the components of the foam-type mosquito repellent also include water.

[0020] According to some embodiments of the present invention, the foam-type mosquito repellent liquid comprises the following components: 5-10 parts of DEET, 2-3 parts of AES, 1-2 parts of sodium fatty acid sulfate, 0.05-3 parts of sodium hyaluronate, 0.05-0.1 parts of borneol, 0.2-1 parts of plant extract, 10-30 parts of solvent, and the balance being deionized water, for a total of 100 parts.

[0021] A second aspect of the present invention provides a method for preparing the foam-type mosquito repellent liquid, comprising: mixing the components of the foam-type mosquito repellent liquid.

[0022] According to some embodiments of the present invention, the mixture of the components further includes pouring it into a container equipped with a pump head.

[0023] According to some embodiments of the present invention, the method for preparing the foam-type mosquito repellent includes:

[0024] S1: Mix the mosquito-repellent active ingredient, the plant extract, the cooling agent, and the solvent to obtain solution A;

[0025] S2: Take the water, the surfactant, and the emollient and mix them to obtain solution B;

[0026] S3: Mix solution B and solution A to obtain a transparent and clear solution C;

[0027] S4: Pour the solution C into a container with a foam pump head to obtain a foam-type mosquito repellent.

[0028] The foam-type mosquito repellent of this invention is alcohol-free, less irritating, and safer. It is safer and more efficient in production, transportation, and sales, and easier to industrialize. The foam-type mosquito repellent, when used with a pump head, directly dispenses the foam, avoiding waste caused by direct evaporation, resulting in 100% product utilization. Compared to paste-type products (mosquito repellent creams), it leaves a smooth, non-sticky finish. The mosquito repellent in this patent is easy to spread and convenient to use, with a more even application. The preparation method is simple, and it has strong applicability. No heating is required during production and processing, adhering to a green, low-carbon, environmentally friendly, safe, and efficient technology development philosophy. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0031] It should be understood that in the various embodiments of this application, the order of the above processes does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0032] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] The weights of the relevant components mentioned in the embodiments of this application can refer not only to the specific content of each component, but also to the proportional relationship between the weights of the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this application is within the scope disclosed in the embodiments of this application. Specifically, the mass described in the embodiments of this application can be a mass unit known in the chemical industry, such as μg, mg, g, or kg.

[0034] Example 1

[0035] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is as follows: S1: Weigh the mosquito repellent active ingredient, the plant extract, the cooling agent and the solvent and mix them to obtain solution A;

[0036] S2: Weigh the water, the surfactant, and the emollient, and mix them to obtain solution B;

[0037] S3: Mix solution B and solution A to obtain a transparent and clear solution C;

[0038] S4: Pour the solution C into a container with a foam pump head to obtain a foam-type mosquito repellent.

[0039] Example 2

[0040] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0041] Example 3

[0042] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0043] Example 4

[0044] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0045] Example 5

[0046] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0047] Example 6

[0048] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0049] Example 7

[0050] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this embodiment are shown in Table 1. The preparation method is the same as in Embodiment 1.

[0051] Comparative Example 1

[0052] Comparative Example 1 is a commercially available 7% common DEET mosquito repellent liquid.

[0053] Comparative Example 2

[0054] This comparative example provides a foam-type mosquito repellent. The difference between this comparative example and Example 1 is that it does not include surfactants, while the other conditions are the same.

[0055] Comparative Example 3

[0056] This comparative example provides a foam-type mosquito repellent. The difference between this comparative example and Example 1 is that it does not include a moisturizer, while the other conditions are the same.

[0057] Comparative Example 4

[0058] This embodiment provides a foam-type mosquito repellent liquid. The weight parts of each component in this comparative example are shown in Table 1. The preparation method is the same as in Example 1. No plant extracts were added in this embodiment.

[0059] Table 1. Content of each component in the examples

[0060]

[0061]

[0062] Test Example 1

[0063] Product effectiveness test:

[0064] Mosquito cage bite method: Refer to "GB-T 13917.9-2009 Indoor efficacy test and evaluation of pesticide registration sanitary insecticides - Part 9 Repellents" mosquito cage bite method.

[0065] (Uneven application) Prepare 300 Aedes albopictus mosquitoes and release them into a test mosquito cage. Cut a 40mm x 40mm square bite window from a rubber glove. Wearing the glove on one hand, test the number of blank bites within 2 minutes and record the data. Four qualified testers, wearing the prepared rubber gloves, draw a 50mm x 50mm skin area on the back of their bare hands, applying 1.5mg / cm². 2 The appropriate amount of insecticide was evenly applied to a 40mm x 40mm sample, leaving a 10mm margin untreated to simulate uneven application. At regular intervals, a hand was placed inside the mosquito cage and held for 2 minutes, recording the number of mosquitoes landing on it. Tests were conducted every 0.5 hours, recording the number of mosquito bites for each time period within 2 hours. The mosquito bite rate for each time period was calculated using the following formula. The results are shown in Tables 2 and 3.

[0066]

[0067] (Evenly application) Prepare 300 Aedes albopictus mosquitoes and release them into a test mosquito cage. Cut a 40mm x 40mm square bite window from a rubber glove. Wearing the glove on one hand, test the number of blank bites within 2 minutes and record the data. Four qualified testers, wearing the prepared rubber gloves, draw a 50mm x 50mm skin area on the back of their bare hands, applying 1.5mg / cm². 2 The appropriate amount of the drug was evenly applied to a 40mm x 40mm sample. After 2 hours, the user placed their hand inside the mosquito cage for 2 minutes and recorded the number of mosquitoes that landed on it. After 2 hours, the test was repeated every 0.5 hours. The test was stopped when mosquitoes started biting the user, and the effective protection time was recorded. The average protection time of the testers was taken as the final effective protection time.

[0068] Table 2. Performance Tests of Examples

[0069]

[0070] Table 3. Comparative Performance Tests

[0071]

[0072] The results showed that adding plant essential oils could effectively enhance the efficacy of the repellent even under uneven application conditions, with the optimal formulation being that in Example 3. The present invention uses a pump head to directly dispense foam mosquito repellent, avoiding waste caused by direct evaporation of the repellent, resulting in 100% product utilization. Compared to cream-based (mosquito repellent cream) products, it leaves the skin smooth, non-sticky, and easy to spread, resulting in more even application.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A foam-type mosquito repellent, characterized in that, It includes the following components in parts by weight: 5-10 parts of IR353-DEET, 2-5 parts of surfactant, 0.05-3 parts of emollient, and 0.2-5 parts of plant extract; The surfactants include sodium fatty acid sulfate and AES; The emollient includes sodium hyaluronate; The plant extract includes at least one of melaleuca oil, tomato essential oil and cornelian cherry essential oil; The foam-type mosquito repellent also includes a solvent and a cooling agent, wherein the solvent includes at least one of 1,3-butanediol, propylene glycol, and hexanediol.

2. The foam-type mosquito repellent liquid according to claim 1, characterized in that, The foam-type mosquito repellent also includes water.

3. The foam-type mosquito repellent liquid according to claim 2, characterized in that, By weight, the foam-type mosquito repellent liquid comprises the following components: 5-10 parts of IR3535, 10-30 parts of solvent, and 0.05-0.1 parts of cooling agent.

4. The foam-type mosquito repellent liquid according to claim 1, characterized in that, The weight ratio of the calendula oil, the tomato essential oil, and the cornelian cherry essential oil is 1~2:1~2:1~20.

5. The foam-type mosquito repellent liquid according to claim 1, characterized in that, The cooling agent includes at least one of menthol, menthol, and borneol.

6. The method for preparing the foam-type mosquito repellent liquid according to any one of claims 1 to 5, characterized in that, include: Mix the components of the foam-type mosquito repellent.

7. The preparation method according to claim 6, characterized in that, The mixture of components is then poured into a container equipped with a pump head.

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