Pesticide nano-solid dispersion and preparation method thereof

A technology for solid dispersions and pesticides, applied in the field of pesticides, can solve the problems of agglomeration, flocculation, and sedimentation that cannot be effectively overcome, difficulty in exerting ideal application effects, and poor stability of liquid formulations.

Active Publication Date: 2015-07-29
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its main defect is that the stability of the liquid preparation is poor, usually need to add more stabilizer and suspending agent
[0008] In addition, some progress has been made in the preparation of insoluble pesticides into nanoscale ultrafine powder preparations. , flocculation, sedimentation and other problems have not been effectively overcome and resolved, making it difficult to exert the ideal application effect

Method used

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  • Pesticide nano-solid dispersion and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0079] Embodiment 1: Preparation of pesticide nano solid dispersion of the present invention

[0080] The implementation steps of this embodiment are as follows:

[0081] A. Preparation of Nanodispersion

[0082] Heat 0.001 parts by weight of lambda-cyhalothrin insecticide to about 10°C higher than its melting point of 49.2°C, pour it into water, and then use a high-speed shear emulsifier sold under the trade name C25 by ATS Company at a speed of 10,000rpm Under shearing for 20min, the lambda-cyhalothrin is uniformly dispersed in water, then cooled to normal temperature to obtain a dispersion of lambda-cyhalothrin solid nanoparticles; then

[0083] B. Preparation of Nano Solid Dispersion

[0084] Add 0.099 parts by weight of sodium dodecylsulfonate anionic surfactant and 99.9 parts by weight of urea to the efficient cyhalothrin solid nanoparticle dispersion obtained in step A, stir evenly with a rotating speed of 1000rpm, and then use The drying equipment sold by the compan...

Embodiment 2

[0086] Embodiment 2: Preparation of pesticide nano solid dispersion of the present invention

[0087] The implementation steps of this embodiment are as follows:

[0088] A. Preparation of Nanodispersion

[0089] Heat 10 parts by weight of nitenpyram insecticide to about 10°C higher than its melting point of 83°C, pour it into water, and then use a high-speed shear emulsifier sold under the trade name C25 by ATS Company to shear at a speed of 20,000rpm. Cut for 20 minutes, uniformly disperse nitenpyram in water, and cool to normal temperature to obtain a nitenpyram solid nanoparticle dispersion; then

[0090] B. Preparation of Nano Solid Dispersion

[0091] Add 50 parts by weight of monododecyl ether phosphate salt anionic surfactant and 40 parts by weight of sodium sulfate water-soluble carrier to the nitenpyram solid nanoparticle dispersion liquid obtained in step A, stir evenly with rotating speed 1800rpm, and then use The rotary evaporator sold under the trade name R-21...

Embodiment 3

[0093] Embodiment 3: Preparation of pesticide nano solid dispersion of the present invention

[0094] The implementation steps of this embodiment are as follows:

[0095] A. Preparation of Nanodispersion

[0096] 30 parts by weight of spinosad insecticides are heated to about 10°C above its melting point of 84°C, poured into water, and then homogenized under the condition of a pressure of 600bar using a high-pressure homogenizer sold by ATS Company under the trade name AH-100D. After 20 minutes, the spinosyn was uniformly dispersed in water, and cooled to normal temperature to obtain a spinosad solid nanoparticle dispersion; then

[0097] B. Preparation of Nano Solid Dispersion

[0098] Add 0.03 parts by weight of octyl ether phosphate anionic surfactant and 69.97 parts by weight of magnesium sulfate water-soluble carrier to the spinosad solid nanoparticle dispersion obtained in step A, stir evenly with a rotating speed of 1200rpm, and then use the The equipment sold under ...

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Abstract

The invention relates to a pesticide nano-solid dispersion and a preparation method thereof. The pesticide nano-solid dispersion comprises 0.001-90 parts of a pesticide by weight, 0.001-50 parts of a surfactant and 5-99.9 parts of a water-soluble carrier, wherein the pesticide is selected from one or more insoluble insecticides, bactericides, herbicides or plant growth regulators; the particle size of the solid dispersion is smaller than 1 mu m. Compared with the prior art, the dispersion and the preparation method have the benefits as follows: the pesticide dispersion particle size is smaller and more uniform, the coating effect of the surfactant on the dispersion is better, the content of the surfactant can be lower than 1% and even lower than 0.1%, the good dispersion property and the good stability are kept, organic solvents can be completely avoided, and the production cost is significantly saved; the pesticide usage amount can be reduced by increasing the effective utilization rate, agricultural product residues such as pesticide residues, harmful solvents and aids as well as environmental pollution can be significantly reduced, and grain, food and ecological safety can be guaranteed.

Description

【Technical field】 [0001] The invention belongs to the technical field of pesticides. More specifically, the present invention relates to a pesticide nano solid dispersion, and also relates to a preparation method of the pesticide nano solid dispersion. 【Background technique】 [0002] Pesticides are an important material basis for defending against major biological disasters, ensuring food security, and promoting sustained and stable growth in agricultural production. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the loss of agricultural products recovered from the use of pesticides to control diseases and insect pests in the world accounts for about 30% of the total output. Except for a few varieties, the original pesticides generally cannot be applied directly, and must be used in conjunction with one or more pesticide adjuvants according to the characteristics of the original medicine and the specific requirements of use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/10A01N25/08
CPCA01N25/30A01N25/04A01N31/02A01N33/18A01N37/26A01N37/30A01N39/02A01N43/22A01N43/40A01N43/50A01N43/653A01N43/78A01N43/88A01N43/90A01N47/12A01N47/36A01N47/38A01N53/00A01N55/00A01N25/08A01N37/22A01N37/38A01N43/56A01N43/66A01N47/10
Inventor 崔海信崔博冯磊刘国强
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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