KR20000019714A - Environmental friendly low poison oil-in-water emulsion insecticide composition - Google Patents

Abstract

PURPOSE: An insecticide is to be non-poisonous to human body and after use it is to be easily decomposable biologically in natural circumstance for no residual component substance to cause environmental pollution while keeping or enhancing the effect of insecticide. CONSTITUTION: The insecticide composition employs a nonpoisonous natural solvent,dilemonene, as an insect killing component or as a solvent for various insect killing active component and also employs, as a surfactant, a natural lecithin or a multivalent fatty acid ester compound, whose safety is assured to be used as a food additive, to produce an oil-water emulsion.

Description

Environment-friendly low toxicity oil-in-water latex insecticide composition

The present invention contains di-limonene as an insecticidal active ingredient and a solvent, as a surfactant a natural polyphenol-based substance as a natural lecithin or a polyvalent fatty acid ester such as sucrose fatty acid ester or glycerin fatty acid ester and a deodorant component, and is harmless to human body. The present invention relates to an oil-in-water type latex insecticide composition which is environmentally friendly.

As the use of household pesticides and pesticides, which show an average elongation rate of around 15 to 20% annually, is rapidly increasing, the safety of these products and the environmental pollution caused by them are becoming more and more problematic. In the United States, 25% of cancer causes are directly or indirectly related to pesticides or household pesticides.

Insecticides have been steadily improved so far in two aspects: pest effectiveness and human and environmental safety. DDT and organic chlorine insecticides such as Aldrin, Dieldrin, and Lindane (γ-BHC), which have been known as the most effective insecticides, have a stable molecular structure and are not easily degraded chemically and biologically. As a result, they remain in the environment for a long time and are ultimately fatal to the human body through the food chain.

Therefore, the pesticides currently on the market are mainly composed of pyrethroid, carbamate and organophosphorus. However, carbamate and organophosphorus have high skin toxicity or inhalation toxicity to the human body, and can also cause serious problems if left in the soil or body. On the other hand, pyrethroid compounds are generally known to be low toxicity to humans and livestock, but when exposed to the air, they are easily oxidized or photolyzed, resulting in a short duration of drug efficacy, resulting in high costs of pest control.

Such hygienic pest control medicines are mostly formulated into aerosols, emulsions, hydrating powders, powders, etc., but the most common pesticides for household use are mats and aerosols. Gases and the like are highly flammable and there is a risk of explosion during storage and use, and various gas components released during use not only have a significant effect on the central nervous system of the human body but also cause environmental pollution, and thus their use is not preferable. In addition, in the case of various mats to vaporize the drug by heating the mat with a fume, there is also pointed out that the industrial organic components contained in these mats are also volatilized to adversely affect the human body.

Therefore, the current global trend is focusing on the development of oil-in-water emulsion (O / W type emulsion) formulations in place of the mats and aerosol formulations. However, most pesticide emulsions use (industrial) organic solvents, such as mineral oil, paraffin and cycloparaffin, as emulsifiers for control chemicals, and emulsifiers such as polyethoxynonylphenol as surfactants. Adopted, these components remain in the environment after use, causing serious secondary pollution. In particular, it is well known that polyethoxynonylphenol and the like are easily decomposed into alkylphenol-based compounds such as nonylphenol in the environment, and thus act as so-called environmental hormones, causing serious side effects on the ecosystem.

Therefore, the present invention is a new latex (emulsion) insecticide that is not only toxic to the human body but also can easily maintain or enhance the efficacy of the pesticidal active ingredient without causing environmental pollution due to residual biodegradation in the environment after use. It is aimed at providing the offer.

As described above, the object of the present invention is to use di-limonene, which is a natural solvent that is harmless to the human body, as a pesticidal active ingredient itself or as a solvent of various pesticidal active ingredients, and is widely used as a food additive as a surfactant. It can be achieved by preparing an oil-in-water (O / W type emulsion) formulation using lecithin or a polyhydric acid ester compound.

In the present invention, di-limonene, which is used as a solvent for the pesticidal active ingredient itself or other pesticidal active ingredients, is represented by the following structural formula as a substance extracted from citrus peel, and the chemical name is 1-methyl-4- (1-methylethenyl) Cyclohexene.

Di-limonene has been known to be excellent in cleaning function and has been used mainly as a main component of various cleaning agents (Korean Patent Publication Nos. 95-8982, 96-4485, 96-2871, 96-11675, etc.). ).

However, in the present invention, di-limonene is used as an insecticidal active ingredient in an oil-in-water latex insecticide, and also as a solvent for the insecticidal active ingredient. Di-limonene is harmless to warm-blooded animals such as humans or pets, but di-limonene alone is used in the insecticide composition of the present invention without the use of other pesticidal active ingredients in the insecticide composition of the present invention. When used, it can be used as a non-toxic insecticide for the control and control of pets, mites, fleas and other blood-sucking insects. In addition, when di-limonene is used as a solvent for various insecticidal active ingredients, synergistic effect of di-limonene and various insecticidal active ingredients can be expected, and it shows an excellent effect on the control and control of sanitary pests such as mosquitoes, flies and cockroaches. It not only solves the problems of human toxicity and environmental pollution caused by industrial organic solvents used as solvents in conventional latex insecticides, but also gives a good aroma of citrus fruits due to di-limonene. The unpleasant smell of the back may also solve the problem of inconvenience to the user.

In the present invention, the amount of di-limonene is preferably in the range of 0.5 to 15% by weight based on the whole composition in consideration of the insecticidal effect and the effect as a solvent, it is possible to use natural extracts or synthetic products.

In the oil-in-water latex insecticide composition of the present invention, various insecticidal active ingredients that can be used as di-limonene as a solvent include conventional carbamate-based carbamates, mobams, and zectrans, TEPP, parathion, diazinone, and diphthene. There are natural and synthetic pyrethroids such as organophosphorus such as Rex, pemetrin, phthaltrin, resmetrin, pyrethrin, and the like, and these may be used alone or in combination, and the amount of these may be used in consideration of insecticidal effects. The range of 15 weight% is preferable.

In the pesticide composition of the present invention, at least one selected from natural lecithin such as soybean lecithin and egrecithin, and polysaccharide fatty acid ester compounds such as sucrose fatty acid ester and glycerin fatty acid ester, has been used as a surfactant. By doing so, it is possible to solve the problem caused by environmental hormone components such as surfactants such as polyethoxynonylphenol which are mainly used in the latex pesticides. In the present invention, the amount of the surfactant is preferably 0.5 to 15% by weight in consideration of emulsion stability.

In the pesticide composition of the present invention, one or more of apple extract, green tea extract, and coffee extract may be added in an amount of 0.01 to 5% by weight based on the content of natural polyphenols as a natural polyphenolic compound source. Deodorant effect can be expected.

Example 1

1.2 g of soy lecithin and 2.2 g of glycerin were slowly dissolved in about 300 ml of purified water to prepare an aqueous phase. Next, 1.0 g of permethrin (cis: trans = 25: 75) was dissolved in 3 ml of di-limonene (trade name; E-Z-Mulse, manufactured by Florida Chemicals) as an insecticidal active ingredient to prepare an oil phase. The oil phase was slowly dripped at the water phase, stirring the said water phase with the high speed emulsion, and the emulsion was prepared. An appropriate amount of purified water was added to the obtained emulsion with stirring with an emulsifier to make the total amount 400 ml. This is called latex for insecticide I.

Example 2

An aqueous phase was prepared by dissolving 1.0 g of sudang fatty acid ester, 0.5 g of glycerin fatty acid ester, 0.4 g of apple extract (0.2 g as natural polyphenols), 6.4 g of glycerin, and 3.0 g of ethanol in about 300 ml of purified water. Subsequently, 1.0 g of permethrin (cis: trin = 25: 75) was dissolved in 3 ml of di-limonene as an insecticidal active ingredient to prepare an oil phase, which was then heated to 60 to 70 ° C. The oil phase was slowly dripped at the water phase, stirring the said water phase with the high speed emulsion, and the emulsion was prepared. Appropriate amount of purified water was added to the obtained emulsion with stirring in an emulsifier so that the total amount was 400 ml, thereby preparing a deodorant and insecticide emulsion. This is called latex for insecticide II.

Example 3

1.2 g of soy lecithin, 2.2 g of glycerin and 0.4 g of apple extract (0.2 g as natural polyphenols) were slowly dissolved in about 300 ml of purified water to prepare an aqueous phase. While the obtained water phase was stirred with a high speed emulsifier, 5.0 ml of di-limonene was slowly added dropwise to the water phase to prepare an emulsion. An appropriate amount of purified water was added to the obtained emulsion while stirring with an emulsifier to prepare 400 ml of deodorant and insecticide emulsion.

Example 4

In Example 1, 400 ml of pesticide emulsion was prepared in the same manner, using 1.2 g of egrecithin instead of soy lecithin as an emulsifier.

Example 5

In Example 1, 400 ml of pesticide emulsion was prepared in the same manner by using 3.08 g of pyrethrin x (0.616 g as total pyrethrin) and 3.08 g of piperonyl butoxide instead of permethrin as the pesticidal active ingredient.

Example 6

In Example 1, 400 ml of pesticide emulsion was prepared in the same manner using 1.0 g of permethrin and 0.30 g of phthaline as the pesticidal active ingredient.

Example 7

In Example 1, 400ml of an insecticide emulsion was prepared in the same manner using 0.8 g of phthaline, 0.2 g of resmethrin, and 2.668 g of piperonyl butoxide as the pesticidal active ingredient.

Example 8

In Example 1, 400 ml of the pesticide emulsion was prepared in the same manner using 0.21 g of pyrethrin x (0.042 g as total pyrethrin), piperonyl butoxide 1.056 g, and diazinon 2.0 g as the insecticidal active ingredient.

Example 9

Instead of apple extract in Example 3 using a coffee extract 2.0g (0.2g as natural polyphenols) to prepare a deodorant and insecticide emulsion 400ml in the same manner.

Example 10

Green apple extract 0.4g (0.2g as natural polyphenols) in the apple extract in Example 3 to prepare a deodorant and insecticide emulsion 400ml in the same manner.

Insecticidal test

(1) Space spray

25 adult females of red-cold mosquitoes are placed in two exposed lengths with a mesh of cylindrical wire 10cm in diameter and 18cm in height, respectively, and placed in a space of 1m above the ground. Sprayed in the exposed field, and counted the number of deaths every 10 minutes, 30 minutes, 60 minutes, 120 minutes after spraying, the results are shown in Table 1.

(2) Residual spray

① mosquito

The pesticide emulsion obtained in Example 1 was quantitated at 40 ml / m2 in two exposed fields, smeared and dried sufficiently, and 25 female adult females were placed there. The exposure time was 10 minutes, 30 minutes, and 60 minutes. The number of lethal populations was counted and the results are shown in Table 2.

② wheel

The emulsion obtained in Example 1 was quantified at 40 ml / m 2 at the bottom of a 1000 ml beaker and at a wall surface of 2 cm, and dried completely. 25 adult females of the German wheels were put in a smeared beaker to feed water and food, and the number of lethal populations was counted at 10, 30, and 60 minutes, and the results are shown in Table 3.

As a comparative product for comparison with the example product of the present invention in the insecticidal efficacy test, a product of the company D, which is an existing pesticide emulsion, was used.

* Formulation of domestic company D (pimetrin 0.25%)

In 100 ml

Main ingredient: Permethrin… … … … … … … … … 0.25 g (sheath: trans = 25: 75)

Emulsifier: Shinnopal NP10… … … … … … … … … 0.05 g (Polyethoxynonyl Phenol)

Emulsifier: Shinnopal NP4… … … … … … … 0.0725 g (Polyethoxynonyl Phenol)

Emulsifier: Tensiopix KL70… … … … … … … 0.0025g

Solvent: Exol D80… … … … … … … 0.5350 g (paraffins / cycloparaffins)

Solvent: purified water… … … … … … … Quantity

Table 1. Insecticidal efficacy test results for mosquitoes in space spraying

Test insecticide: Insecticide latex I, II (Permethrin concentration: 0.25%)

Testimonials: Culex Pipiens Pallens

Exposure time Number of specimens The number of fatalities % Mortality Latex I Latex II Company D Latex I Latex II Company D Latex I Latex II Company D 10 minutes 30 minutes 60 minutes 120 minutes 50505050 50505050 50505050 364850- 374650- 344549- 7296100- 7492100- 689098- Control 50 0 0

Table 2. Insecticidal efficacy test results for mosquito insects during residual spraying

Test insecticide: Insecticide latex I, II (Permethrin concentration: 0.25%)

Testimonials: Culex Pipiens Pallens

Exposure time Number of specimens The number of fatalities % Mortality Latex I Latex II Company D Latex I Latex II Company D Latex I Latex II Company D 10 minutes 30 minutes 5050 5050 5050 4850 4950 4449 96100 98100 8898 Control 50 0 0

Table 3. Insecticidal test results for cockroaches during spraying

Test insecticide: Insecticide emulsion I, II (Permethrin concentration: 0.25%)

Testimonial: German Cockroach (Blattella Germanica)

Exposure time Number of specimens The number of fatalities % Mortality Latex I Latex II Company D Latex I Latex II Company D Latex I Latex II Company D 10 minutes 30 minutes 60 minutes 404040 404040 404040 353940 363940 343740 8898100 9098100 8593100 Control 40 0 0

As described above, the oil-in-water latex insecticide composition of the present invention uses di-limonene, which is a natural solvent and has an insecticidal effect in itself, and other surfactants that are safe for the human body such as natural lecithin and optionally natural polyphenols. By using, not only has a superior pesticidal effect compared to the existing pesticide composition, but also has the advantage of less toxicity to the human body and minimize or harm the problem of environmental pollution by residual after use.

Claims (4)

An oil-in-water emulsion emulsion composition comprising 0.5 to 15% by weight of di-limonene and 0.5 to 15% by weight of lecithin or a polyvalent fatty acid ester compound as a surfactant. The oil-in-water emulsion emulsion composition according to claim 1, further comprising at least one selected from carbamate-based, organophosphorus-based, natural and synthetic pyrethroid-based insecticides as the pesticidal active ingredient. The oil-in-water emulsion emulsion composition according to claim 1, wherein the lecithin is at least one selected from soy lecithin and egrecithin, and the polyhydric fatty acid ester is at least one selected from sucrose fatty acid ester and glycerin fatty acid ester. The oil-in-water type according to claim 1, further comprising 0.01 to 5% by weight of at least one natural polyphenol-containing extract selected from apple extract, green tea extract, and coffee extract as deodorant components. Latex Insecticide Composition.