Liquid mosquito-repellent incense and preparation method thereof

Abstract

The invention discloses a liquid mosquito-repellent incense and a preparation method thereof. The liquid mosquito-repellent incense is prepared from, by mass, 0.01-0.03% of dextrorotatory heptafluthrin, 0.2-0.5% of p-cymene, 0.5-2% of angelica root essential oil, 1-3% of sodium lauroyl sarcosinate, 50-65% of mixed alcohol and the balance deionized water. The liquid mosquito-repellent incense is anO / W-type water-based microemulsion system which is thermodynamically stable, the properties are stable, the particle size of the emulsion is small, a core rod is not easily blocked, the effect of repelling and killing mosquitoes can be continuously exerted, and the liquid mosquito-repellent incense has a long-lasting effect, effects of eliminating anxiety and relieving stress and low VOC content,and is an ideal choice for healthy home life.

Description

technical field [0001] The invention relates to the technical field of sanitary products, in particular to a liquid mosquito coil and a preparation method thereof. Background technique [0002] At present, most of the electric heating liquid mosquito coils on the market are oil-based products, that is, kerosene or other volatile alkanes are used as solvents, and the cost is relatively high, which does not meet the current environmental protection concept of low-carbon economy, energy saving and emission reduction. Moreover, the low-carbon paraffins used in oil-based electric heating liquid mosquito-repellent incense are easy to form organic volatiles, namely VOC. In consumers' daily home life, the heating and natural volatilization of electric heating liquid mosquito-repellent incense will cause pollution to the home environment, causing consumption impact on the health of the patient. [0003] Water-based electric heating liquid mosquito-repellent incense has the advantage...

AI Technical Summary

Problems solved by technology

Most of the existing water-based electric heating liquid mosquito-repellent incense contains pyrethroid components, such as transfluthrin, bifluethrin, proparthrin, tetramethrin, etc., which have fast knockdown, strong insecticidal power, Broad-spectrum, low toxicity, low residue, etc., but long-term use of pyrethroid insecticides is prone to drug resistance, which affects the efficacy of mosquito-repellent incense, and the content of pyrethroids in liquid mosquito-repellent incense generally reaches more than 0.1%. Even as high as 2 to 5%, long-term use has a greater impact on human health

On the other hand, in order to reduce the amount of pyrethroids and reduce drug resistance, liquid mosquito-repellent incense with natural plant extracts or plant essential oils as insecticidal active agents has been a research hotspot in recent years, but the preparation process of natural plant extracts is complex and costly. Higher, but plant essential oils are difficult to dissolve in water-based products, and surfactants need to be added to promote emulsification, and these surfactants generally have relatively large molecular weights, and most of them are polymers. Blockage, resulting in slower and slower volatilization in the later stage, and obvious uneven volatilization

[0004] The Chinese patent application with the publication number CN 102232379 A discloses a water-based electric heating mosquito-repellent liquid and its preparation method. , and use Tween-80 or fatty alcohol polyoxyethylene ether as the surfactant, the content of mosquito repellent drug is high, there is a safety hazard in use, and the surfactant used has a large molecular weight, high viscosity, and is easy to block mandrel

[0005] The Chinese patent application with the publication number CN 107136133 A discloses a preparation method of a water-based plant electric mosquito-repellent incense liquid, which contains perfluthrin, plant extracts, non-ionic surfactants, and preservatives , ethanol, water and other ingredients, among which the raw materials of plant extracts include lemongrass, sage, wild chrysanthemum, aloe, chrysanthemum root, tobacco, mugwort leaves, cloves, mint, ageratum, gentian, and the preparation process is relatively complicated ,higher cost

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