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Water-based self-emulsifying organic sulfur-phosphorus pesticide microcapsule and preparation method thereof

An organic sulfur-phosphorus and self-emulsifying technology is applied in the field of preservation of animal and plant bodies or their parts, which can solve the problems of difficulty in controlling the strength of capsule materials, difficulty in achieving release effect, etc., and achieves good emulsification effect, not easy to settle, and good dissolution sexual effect

Active Publication Date: 2020-05-29
宋浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is theoretically feasible, but it is difficult to control the strength of different parts of the capsule material during the preparation process, so it is difficult to achieve the expected release effect

Method used

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  • Water-based self-emulsifying organic sulfur-phosphorus pesticide microcapsule and preparation method thereof
  • Water-based self-emulsifying organic sulfur-phosphorus pesticide microcapsule and preparation method thereof
  • Water-based self-emulsifying organic sulfur-phosphorus pesticide microcapsule and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0038] (2) Preparation of prepolymer: in step (1), 20-40% of the total mass of small molecule polyol, 20-40% of the total mass of hydroxyacid, 20-40% of the total mass of toluene diisocyanate and carboxyl Bismuth acid is dissolved in alcohol ether ester solvents and polymerized to form a small molecule polymer solution;

[0039] (3) Preparation of the capsule core: adding the organothion pesticide to the small molecule polymer solution prepared in step (2), stirring and mixing evenly to obtain the first mixed solution;

[0040] (4) Preparation of microcapsules: Add the remaining small molecule polyols and hydroxy acids to the first mixed solution prepared in step (3), mix evenly to obtain the second mixed solution, stir the second mixed solution and heat up to 80°C , then slowly add the remaining toluene diisocyanate, stir until the reaction is complete, then add an amine neutralizer, stir to cool down to room temperature, and discharge to obtain microcapsules.

[0041] The o...

Embodiment 1

[0044] Example 1: 1.9 parts by mass of ethylene glycol, 9.9 parts by mass of bismethylolpropionic acid, 0.001 parts by mass of bismuth carboxylate, 12.9 parts by mass of toluene diisocyanate, 25.1 parts by mass of fenitrothion, and 5 parts by mass of dimethylethanolamine , and the rest are propylene glycol methyl ether acetate, a total of 100 parts by mass.

Embodiment 2

[0045] Embodiment 2: 2 mass parts of glycerol, 10 mass parts of bismethylolpropionic acid, 0.001 mass part of bismuth carboxylate, 13 mass parts of toluene diisocyanate, 25 mass parts of fenitrothion, 5.5 mass parts of ethanolamine, and the rest are Dipropylene glycol methyl ether acetate, a total of 100 parts by mass.

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Abstract

The invention discloses a water-based self-emulsifying organic sulfur and phosphorus pesticide microcapsule and a preparation method thereof. The water-based self-emulsifying organic sulfur is prepared from the following raw materials in percentage by mass: 0.5-2% of micromolecular polyhydric alcohol, 8-10% of hydroxy acid, 0.1-0.3% of bismuth carboxylate, 12-13% of toluene diisocynate, 25-30%of organic sulfur-phosphorus pesticide, 5-6% of an amine neutralizer and the balance of alcohol ether ester solvent. The microcapsule adopts an alcoholic hydroxyl carboxylic acid compound or an alcoholichydroxyl sulfonic acid compound, hydroxyl can be polymerized with isocyanate, carboxyl or sulfo groups in the compound react by an amine neutralizer to generate hydrophilic groups to be introduced into the shell material of the microcapsule, and the number of the hydrophilic groups is adjusted to enable the shell material to be of a dispersive surface active structure, so that the self-emulsification of the microcapsule can be realized, and the shell material of the microcapsule also has hydrophilicity.

Description

technical field [0001] The invention belongs to the technical field of preservation of animals and plants or their parts, and in particular relates to a water-based self-emulsifying organothion pesticide microcapsule and a preparation method thereof. Background technique [0002] Most of the current pesticide spraying methods are diluted with water and then sprayed, especially oil-based pesticides. Because they are insoluble in water, additional emulsifiers need to be added, and they are sprayed after being prepared into emulsions, and the drug effect time is short, so additional spraying is required. The frequency not only increases the consumption of chemicals, but also increases the environmental pollution. [0003] Therefore, microcapsule technology came into being and realized the microencapsulation of pesticides, that is, solid or liquid pesticides are wrapped into microcapsules through the capsule wall, which has the advantages of improving the storage of pesticides, ...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N57/14
CPCA01N25/28A01N57/14
Inventor 宋浩
Owner 宋浩
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