Alkaline mosquito killer without pyrethroid components

Abstract

The invention belongs to the field of mosquito prevention and killing, and particularly relates to a technology for killing mosquitoes by using a safe and non-toxic alkaline which does not contain pyrethroids and phosphorus. The preparation method comprises the following steps: mixing water, glycol stearate, tetrasodium glutamate diacetate, sodium hydroxide, fatty alcohol-polyoxyethylene ether and polydimethylsiloxane to obtain a mixed aqueous solution, standing, and filtering to obtain a final aqueous solution of the mosquito killer. Strict tests prove that the non-pyrethroid alkaline mosquito killer has a very high killing effect on static and flying mosquitoes by spraying an aqueous solution through a spraying can, is environment-friendly, particularly has no pollution to air when being used in a closed space, and is an ideal non-pyrethroid alkaline mosquito killer. The pyrethroid mosquitocide has a good killing effect on various mosquitoes, and another mosquito killing method except the pyrethroid mosquitocide is provided.

Description

Technical Field

[0001] This invention relates to the technical field of mosquito repellents and insecticides, specifically to a mosquito control method that does not contain pyrethroid insecticides. Background Technology

[0002] Among existing mosquito repellent technologies, the most common approach is to utilize pyrethroids, which work by interfering with the mosquito's nervous system, causing paralysis or death. Examples include cypermethrin (Methion) and deltamethrin (Dichlorvos). Cyanopenta Pyrethroids (e.g., pyrethroid insecticides). While these insecticides are very effective at killing mosquitoes, prolonged contact with humans can cause skin and respiratory poisoning. Symptoms mainly include redness, swelling, pain, and rashes at the contact site, as well as salivation, nausea, and vomiting. In particular, mosquito repellents used in homes typically disperse as aerosols through high-pressure gas spraying, which significantly pollutes indoor air. This is especially problematic in enclosed spaces such as air-conditioned rooms and vehicles. The government has strict requirements for household hygiene insecticides (including mosquito repellents), requiring mosquito repellent products to comply with the national standard GB 24330-2020, which mandates strict control over the content of active ingredients (such as cypermethrin). Therefore, given the chemical toxicity of commonly used pyrethroid insecticides, there is an urgent need for a non-toxic or low-toxic, effective mosquito repellent product that does not contain pyrethroid insecticidal ingredients. Summary of the Invention

[0003] Technical problems to be solved The present invention aims to solve the existing mosquito repellent technology that is harmless to the human body, does not pollute indoor air, and does not contain pyrethroids.

[0004] Technical solution To achieve the above objectives, this invention utilizes the characteristic that mosquitoes are not resistant to alkaline substances. According to existing mosquito control theories, alkaline substances, such as a very low concentration of sodium hydroxide aqueous solution, can effectively neutralize the formic acid unique to mosquitoes and dissolve and destroy chitin, the substance that constitutes mosquito wings. Based on this theory, the aqueous solution of this invention contains the following components: 1. Water; 2. Ethylene glycol stearate; 3. Fatty alcohol polyoxyethylene ether; 4. Sodium hydroxide; 5. Polydimethylsiloxane; 6. Tetrasodium diglutamate.

[0005] Beneficial effects The aqueous solution formed by the mixture of the above-listed components, when sprayed onto stationary or flying mosquitoes using an electric or manual spraying device, utilizes the following: ethylene glycol stearate, acting as an emulsifier, allows the aqueous solution to adhere to the mosquito's surface oils, preventing it from sliding off. Next, fatty alcohol polyoxyethylene ether enables the solution to quickly penetrate the mosquito's body. Subsequently, sodium hydroxide begins to neutralize formic acid within the mosquito's body. During neutralization, the two combine to form sodium formate and water. Simultaneously, sodium hydroxide also begins to dissolve the chitinous membrane, a component of the mosquito's wings, because it reacts with the amino group (-NH2) in chitin to generate ammonium ions (-NH3+), causing the amino group in the chitin molecule to become positively charged, making it hydrophilic and thus dissolving. This combined effect on the mosquito renders it unable to bite and unable to fly. Polydimethylsiloxane acts as an adhesive, preventing the aqueous solution from rapidly evaporating from the mosquito's surface and improving its effectiveness in high-temperature environments. The role of tetrasodium glutamate diacetate in the solvent is to reduce the damage of heavy ions to the active ingredients, prevent precipitation, and extend the product's shelf life. Tests on mosquitoes using this aqueous solution showed an effectiveness of over 98%, especially against flying mosquitoes. When their surface is covered by the sprayed mist of the aqueous solution, they immediately lose their ability to fly and their physiological functions within twenty minutes. Because this aqueous solution does not contain organic solvents such as methanol, gasoline, or alcohol, there is no risk of explosion or fire when heated. Also, because this water-soluble solution does not contain volatile organic solvents, it will not form an aerosol and disperse indoors like household pressure-filled pyrethroid insecticides when sprayed into the air. Furthermore, the emulsified mist droplets formed after spraying are relatively large and quickly fall to the ground due to gravity, thus preventing indoor air pollution. According to comparison, its trace alkaline components (1-2%) are lower than those of household laundry detergent (national standard GB / T 13171.1-2022 stipulates that the sodium hydroxide content shall not exceed 10.5%) and household degreaser (national standard GB / T 35833-2018 stipulates that the sodium hydroxide content shall not exceed 3%), so its corrosiveness is very low and it is safe and reliable for the human body. Other components in this aqueous solution include: ethylene glycol stearate, commonly used as an emulsifier in cosmetics and skincare products, whose safety is guaranteed; tetrasodium glutamate diacetate, a chelating agent commonly used in cosmetics, which combines with calcium and magnesium ions in water to reduce irritation caused by trace metal ions, reduce scale, and prolong product effectiveness; fatty alcohol polyoxyethylene ether, a commonly used nonionic surfactant, often used in household detergents and cosmetics; and polydimethylsiloxane, a colorless, odorless, and non-toxic organosilicon polymer widely used in food, fermentation, and demolding. These components do not generate new compounds harmful to the human body in the water mixture. This aqueous solution is only effective against mosquitoes. Due to its physicochemical properties, it has no effect on large insects such as cockroaches and wasps, and is not very effective against flies and ants. Detailed Implementation

[0006] 1. 500 parts purified water. 2. 6-20 parts ethylene glycol stearate. 3. 5-20 parts fatty alcohol polyoxyethylene ether. 4. 5-17 parts sodium hydroxide. 5. 3-8 parts polydimethylsiloxane. 6. 3-10 parts tetrasodium diacetate of glutamate. Prepare 500g of purified water in a glass container. Add the above ingredients in the order listed in the table above. Stir at room temperature until all ingredients are dissolved. Let the solution stand for 24 hours. Then filter the solution through a food-grade 316L stainless steel filter to remove impurities, resulting in a mosquito repellent solution. This solution can be filled into a non-sealed electric or press-type spray bottle for use. Simply spray on stationary or flying mosquitoes indoors to achieve the killing effect.

Claims

1. The mosquito repellent has the following characteristics:

1. Water 500 parts; 2. Ethylene glycol stearate 3-6 parts; 3. Tetrasodium diglutamate 3-8 parts; 4. Sodium hydroxide 5-10 parts.

5. Fatty alcohol polyoxyethylene ether, 3-10 parts.

6. Polydimethylsiloxane: A mosquito repellent formed by mixing 1-5 parts.

2. A method of neutralizing formic acid (formic acid) in mosquitoes and dissolving the chitin in mosquito wings by spraying an aqueous solution dominated by sodium hydroxide, thereby causing mosquitoes to lose their physiological functions and flight ability.