Method for preparing pesticide avermectin microcapsule

A technology of abamectin and microcapsules, which is applied in the field of preparing pesticide abamectin microcapsules, can solve problems such as endangering human health, destroying the ecological environment, and polluting the environment, and achieves low equipment investment, pollution control, and ecological environment prevention the effect of the change

Inactive Publication Date: 2005-09-07
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current development of pesticides, Abamectin, as a broad-spectrum insecticide, is used as a biopesticide for soil and plant root pest control. It mainly focuses on the development of traditional formulations such as emulsifiable concentrates and suspensions. These formulations

Method used

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  • Method for preparing pesticide avermectin microcapsule
  • Method for preparing pesticide avermectin microcapsule

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The equipment used for implementing the present invention is traditional equipment.

[0014] The preparation of prepolymer: accurately weigh 12g urea and dissolve it in 24ml formaldehyde (37%) (the mol ratio of formaldehyde and urea is 2: 3), at room temperature its pH value is adjusted to 8.5 with triethanolamine, and The temperature was raised to 70°C for 1 hour, and then diluted with 50ml of distilled water to obtain a stable aqueous solution of urea-formaldehyde resin prepolymer;

[0015] Preparation of abamectin mixture solution: accurately weigh 1.5g abamectin and dissolve it in 25ml chloroform, then add 2% emulsifier to fully disperse and emulsify, add the solution with a density less than 1, 36ml of petroleum ether, at a temperature of 90°C, stir at 1000r / min to make it fully dispersed, when the mixture is compatible and clear;

[0016] Preparation of Abamectin Microcapsules: Add urea-formaldehyde resin prepolymer aqueous solution to the Abamectin mixture solut...

Embodiment 2

[0019] Basically with embodiment 1. The differences are:

[0020] In the preparation process of the prepolymer, accurately weigh 12g of urea and dissolve it in 30ml of formaldehyde (37%) (the molar ratio of formaldehyde to urea is 2:4), the pH value is 8, the reaction temperature is 65 ° C, the reaction time 1.2 hours;

[0021] The addition of emulsifier is 7% in the preparation process of abamectin mixture solution, and temperature is 60 ℃, and stirring speed is 1200r / min;

[0022] In the preparation process of abamectin microcapsules, the urea-formaldehyde resin prepolymer aqueous solution is added in the abamectin mixture solution under stirring at 1200r / min, after stirring for 15min, slowly adding 1M HCl therein, the stirring speed Drop to 500r / min.

Embodiment 3

[0024] Basically with embodiment 1. The differences are:

[0025] In the preparation process of the prepolymer, accurately weigh 12g of urea and dissolve it in 37ml of formaldehyde (37%) (the molar ratio of formaldehyde to urea is 2:5), the pH value is 9, the reaction temperature is 68 ° C, the reaction time 1.5 hours;

[0026] In the preparation process of the avermectin mixture solution, the addition of the emulsifier is 10%, the temperature is 75°C, and the stirring speed is 1500r / min

[0027] In the preparation process of abamectin microcapsules, the urea-formaldehyde resin prepolymer aqueous solution is added in the abamectin mixture solution under stirring at 1500r / min, after stirring for 15min, slowly adding 1M HCl, stirring speed Drop to 650r / min.

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Abstract

The invention relates to a pesticide formulation of nimbin and emamectin benzoate and preparing method belonging to the technology field of pesticide preparation, wherein the conventional in-situ polymerization method is improved for the preparing process, which comprises the preparation of ureaformaldehyde resin prepolymer aqueous solution, preparation of avermectin mixture solution and the preparation of avermectin microcapsule. The invention solves the problem of influenced drug effect by the combination of avermectin and soil, the drug effective period is also extended.

Description

Technical field: [0001] The invention relates to a method for preparing pesticide avermectin microcapsules, belonging to the technical field of pesticide preparation. Background technique: [0002] At present, the new high-efficiency pesticides researched and developed at home and abroad mainly include, one is to develop new high-efficiency and low-toxicity chemical pesticides and change the dosage form of existing pesticides, and the other is biological pesticides. Combined with the actual situation in my country, our country mainly focuses on the transformation of dosage forms and the research and development of biological pesticides. Among the biological pesticides Jinggangmycin, pyrethrin, rotenone, nicotine, and abamectin currently developed in China, abamectin is the product with the best control effect, and it is also the fastest growing and most widely used in the world of biopesticides. However, in the current development of pesticides, Abamectin, as a broad-spect...

Claims

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Application Information

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IPC IPC(8): A01N43/90
Inventor 郑保忠隆泉付仁春杨凯张筱丹周菁冀林仙
Owner YUNNAN UNIV
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