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Water emulsion pesticide system and preparation method thereof

A water emulsion and pesticide technology, applied in the field of pesticides and water emulsion pesticides, can solve the problem that emulsifier has not yet been found, and achieve excellent suspension effect, good suspension stability, and the effect of preventing agglomeration or aggregation.

Active Publication Date: 2012-01-04
SHANTOU SHENTAI NEW MATERIAL TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emulsion-in-water pesticides are an important direction for the development of pesticide formulations at the present stage. The emulsion-in-water pesticides currently on the market are all organophosphorus with relatively high solubility in water. There is no suitable emulsifier to effectively emulsify the organic solvent-soluble emulsifiable pesticide technical and the solid technical or crude oil which is very insoluble in water, oil and organic solvent, so as to form a stable, Efficient water-emulsion system

Method used

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  • Water emulsion pesticide system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 (the original drug is the water emulsion system of chlorpyrifos)

[0039] 1. Formula (based on a total of 100 kg):

[0040] Component Amount added (kg) Chlorpyrifos 40 polymer emulsifier 4 POE (20) Sorbitan Trioleate 5 Xylene 10 water add to 100

[0041] The polymer emulsifier is an amphiphilic polymer with a micro-crosslinked structure obtained by inverse emulsion polymerization with acrylic acid / acryl ammonium chloride / acrylamide at a molar ratio of 1:0.4:0.4. , PH value is 7.1, 1% deionized water dispersion viscosity is 8300mPa·s, relative molecular weight is about 16 million.

[0042] 2. Preparation method:

[0043] (1) Mix xylene and the original drug chlorpyrifos evenly according to the above formula, and then mix evenly with 3 kg of POE (20) sorbitan trioleate, which is the oil phase;

[0044] (2) Mix the polymer emulsifier and the remaining POE (20) sorbitan trioleate evenly, make up the water in the for...

Embodiment 2

[0046] Embodiment 2 (the original drug is the water emulsion system of fenbutatin)

[0047] 1. Formula (based on a total of 100 kg)

[0048] Component Amount added (kg) Phentermine 10 polymer emulsifier 3 lanolin alcohol 1 POE(4) nonylphenol ether 5 No. 5 white mineral oil 15 Ethylene glycol 3 water add to 100

[0049] The high molecular emulsifier is an amphiphilic polymer with a micro-crosslinked structure obtained by inverse emulsion polymerization with a molar ratio of isooctyl acrylate / acryl ammonium chloride / methacrylamide in a ratio of 1:0.1:0.2. The viscosity of the polymer at 25°C, pH value 6.8, 1% deionized water dispersion is 6800mPa·s, and the relative molecular weight is about 12 million.

[0050] 2. Preparation method:

[0051] (1) According to the above formula, mix No. 5 white mineral oil and the original drug phenbutyltin evenly, then mix evenly with 1 kg of lanolin alcohol, add 2 kg of POE (4) nonylp...

Embodiment 3

[0054] Example 3 (Water-emulsion system in which the original drug is Fofenol·Hexythiazox)

[0055] 1. Formula (based on a total of 100 kg)

[0056] Component Amount added (kg) Fofenol·Hexythiazox 20 polymer emulsifier 1.5 POE(2) oleyl ether 1 PEG400 monolaurate 3 acetone 7 Propylene Glycol 4 water add to 100

[0057] The polymer emulsifier is an amphiphilic polymer with a micro-crosslinked structure obtained by solution polymerization with behenyl acrylate / dimethyldiallyl ammonium chloride at a molar ratio of 1:0.3. At 25°C, pH value is 7.1, viscosity of 1% deionized water dispersion is 5200mPa·s, relative molecular weight is about 1 million.

[0058] 2. Preparation method:

[0059] (1) According to the above formula, mix the acetone and the original drug Fenmethoxol·Hexythiazox evenly, and then mix evenly with 1 kg of POE (2) oleyl alcohol ether, add 1 kg of PEG400 monolaurate, mix evenly, and it is oil Mutually; ...

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Abstract

The invention provides a water emulsion pesticide system capable of substituting for the traditional oil emulsion. The system comprises the following raw materials by weight percent: 0.5-60% of crude pesticide or pesticide crude oil, 0.5-5% of macromolecule emulsifier, 0.5-10% of micromolecule emulsifier, 0-15% of cosolvent, 0-5% of adjuvant and the balance of deionized water, wherein the macromolecule emulsifier is an amphiphilic polymer which is formed by polymerizing a component 1, a component 2 and a component 3 at a mole ratio of 1:(0.05-0.5):(0-0.5) and is in a micro-crosslinked structure; the viscosity of the 1% deionized water dispersion of the polymer is between 100 mPa.s to 10000 mPa.s at PH value of 5-9 and 25 DEG C, and a relative molecular weight of the polymer is between 0.5million to 20 million; the component 1 is acrylic acid or acrylic ester with carbon molecular number not more than 36; the component 2 is alkenyl ammonium chloride with carbon molecular number not more than 25; and the component 3 is allyl amide with carbon molecular number not more than 5. The water emulsion pesticide system provided by the invention enables the crude pesticide with tiny solubility in water, oil or organic solvents to form the water emulsion with low toxicity, high efficiency, and good stability. The invention further provides a preparation method of the water emulsion pesticide.

Description

technical field [0001] The present invention relates to a pesticide, in particular to a water-emulsion pesticide, and more specifically to a water-emulsion pesticide system with extremely low solubility in water, oil or organic solvent or crude oil. The present invention also relates to a preparation method of the above water-emulsion type pesticide system. Background technique [0002] Pesticide technical materials generally cannot be used directly, and must be processed and formulated into various types of preparations before use. The form of preparations is called dosage form, and commercial pesticides are sold to users in a certain dosage form. EC is a dosage form that uses a large amount of pesticides in my country. It is prepared by dissolving the original pesticides in organic solvents (benzene, toluene, xylene) in a certain proportion, adding a certain amount of special emulsifiers for pesticides, and preparing a transparent homogeneous Liquid; because the emulsifiab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N57/16A01N55/04A01N47/38A01N31/04A01N57/14A01N43/40A01N43/22A01P7/04A01P7/02A01P3/00A01P5/00A01P13/00A01P21/00
Inventor 张磊杨利超
Owner SHANTOU SHENTAI NEW MATERIAL TECH DEV CO LTD
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