Efficient insecticidal aerosol and preparation method thereof

An aerosol, high-efficiency technology, applied in the direction of insecticides, botanical equipment and methods, biocides, etc., can solve the problems of short residence time, unresolved inhibition of insecticide efficacy, poor compatibility, etc., to achieve Good insecticidal effect and significant control effect

Inactive Publication Date: 2020-10-16
湖南九喜科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for insecticidal aerosols, the proportion of alcohol-based insecticidal aerosols using ethanol as a solvent in the market is much lower than that of oil-based insecticidal aerosols using kerosene as a solvent. The main reason is that In the case of using the same insecticide ingredients, alcohol-based insecticide aerosols are significantly less effective in killing pests than oil-based insecticide aerosols, because kerosene-based solvents help insecticides penetrate quickly. The body surface of insects, and ethanol, due to its high polarity, has poor compatibility with the hydrophobic surface of insects, and has a fast volatilization speed, so it has a short residence time on the body surface of pests, which is not conducive to the onset of insecticidal aerosols.
[0003] However, the above-mentioned problems cannot be solved in the existing disclosed technologies. For example, Chinese patent CN 1628518A discloses a kind of alcohol-based insecticidal aerosol technology, which adopts 0.1%-0.8% pyrethrins by weight as the insecticidal agent. The agent adopts 35%-60% ethanol by weight as a solvent, and does not solve the problem that ethanol is used as a solvent to inhibit the efficacy of insecticides
Chinese patent CN 102669092B discloses a homogeneous high-efficiency water-based insecticidal aerosol formulation with low VOC content, using 53.5% by weight of deionized water and 15% by weight of 95% edible alcohol as solvents. Poor permeability, also does not solve the problem of solvent inhibition of pesticide efficacy

Method used

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  • Efficient insecticidal aerosol and preparation method thereof
  • Efficient insecticidal aerosol and preparation method thereof
  • Efficient insecticidal aerosol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 efficient insecticide aerosol

[0036] Component A: 0.1% by weight of 1,2,4-oxadiazole derivatives represented by formula I;

[0037] Component B: 1% by weight of marigold extract;

[0038] Component C: 3% by weight of C10-18 alkane solvent;

[0039] Component D: 95% by weight of liquefied petroleum gas.

[0040]

[0041] Marigold extract is prepared by the following methods:

[0042] S1. Raw material preparation: wash and dry the marigolds and pulverize them to obtain marigold powder;

[0043] S2. Ultrasonic-assisted water extraction: Add 10g of marigold powder into 50mL of water, stir evenly, heat to 35°C, ultrasonic (power 1000W) assisted extraction for 0.5h, filter, and retain the filter residue;

[0044] S3. Supercritical fluid extraction: extract the filter residue obtained in step S2 through supercritical fluid extraction, and the supercritical fluid extraction conditions are: extraction pressure: 22MPa; extraction temperature: 35°C; CO 2 Flow ...

Embodiment 2

[0058] Embodiment 2 efficient insecticide aerosol

[0059] Component A: 0.3% by weight of 1,2,4-oxadiazole derivatives represented by formula I;

[0060] Component B: 1.2% by weight of marigold extract;

[0061] Component C: 35% by weight of C10-18 alkane solvent;

[0062] Component D: 63.5% by weight of propane.

[0063]

[0064] Marigold extract is prepared by the following methods:

[0065] S1. Raw material preparation: wash and dry the marigolds and pulverize them to obtain marigold powder;

[0066] S2. Ultrasonic-assisted water extraction: Add 10g of marigold powder into 100mL of water, stir evenly, heat to 50°C, ultrasonic (power 1200W) assisted extraction for 1h, filter, and retain the filter residue;

[0067] S3. Supercritical fluid extraction: extract the filter residue obtained in step S2 through supercritical fluid extraction, and the supercritical fluid extraction conditions are: extraction pressure: 27MPa; extraction temperature: 40°C; CO 2 Flow rate: 12L / ...

Embodiment 3

[0081] Embodiment 3 efficient insecticide aerosol

[0082] Component A: 0.5% by weight of 1,2,4-oxadiazole derivatives represented by formula I;

[0083] Component B: 1.5% by weight of marigold extract;

[0084] Component C: 73.9% by weight of C2-C8 small molecule alcohol solvents;

[0085] Component D: 25% by weight of dimethyl ether.

[0086]

[0087] Marigold extract is prepared by the following methods:

[0088] S1. Raw material preparation: wash and dry the marigolds and pulverize them to obtain marigold powder;

[0089] S2. Ultrasonic-assisted water extraction: Add 10g of marigold powder into 70mL of water, stir evenly, heat to 42°C, ultrasonic (power 1100W) assisted extraction for 0.75h, filter, and retain the filter residue;

[0090] S3. Supercritical fluid extraction: extract the filter residue obtained in step S2 through supercritical fluid extraction, and the supercritical fluid extraction conditions are: extraction pressure: 25MPa; extraction temperature: 37...

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Abstract

The invention provides an efficient insecticidal aerosol, which comprises the following components in percentage by weight: 0.1-0.5wt% of a component A, i.e. a 1, 2, 4-diazole derivative shown as a formula I, 1-1.5wt% of a component B, i.e. a marigold extract, 3-73.9wt% of a component C, i.e. a solvent and 25-95wt% of a component D, i.e. a propellant; in the formula, R is equal to CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3; and the propellant is selected from one of liquefied petroleum gas, propane and butane, dimethyl ether or compressed air. The compound shown as the formula I has a good insecticidal effect, has a synergistic effect after being compounded with the marigold extract. The insecticidal aerosol has a remarkable control effect on houseflies, culex pipiens pallens, plutella xylostella, armyworms, aphids, tetranychus cinnabarinus and the like.

Description

technical field [0001] The invention relates to the technical field of insecticides, in particular to a high-efficiency insecticide aerosol and a preparation method thereof. Background technique [0002] Insecticidal aerosols have been widely used in the control of indoor pests. Most of the existing insecticidal aerosols use kerosene as a solvent. The disadvantage is that the kerosene settles on the ground and the surface of objects after spraying and leaves oily traces. And because kerosene contains a small amount of aromatic hydrocarbons and sulfides, it has an unpleasant smell. In order to overcome the above-mentioned shortcomings of kerosene, using ethanol as a solvent is an alternative, because ethanol has the advantages of low odor and fast volatilization. However, for insecticidal aerosols, the proportion of alcohol-based insecticidal aerosols using ethanol as a solvent in the market is much lower than that of oil-based insecticidal aerosols using kerosene as a solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/06A01N43/82A01N65/12A01P7/02A01P7/04C07D271/06
CPCA01N25/06A01N43/82A01N65/00A01N65/12C07D271/06Y02P20/54Y02A50/30
Inventor 王彦安张成都
Owner 湖南九喜科技股份有限公司
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