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Water-based new preparation formulation ZW of chlorpyrifos, and processing and application thereof

A technology of chlorpyrifos and a new dosage form, which is applied in the field of microcapsule suspension-emulsion in water and its processing, can solve the problems of low content of active ingredients, adverse environmental impact, environmental hazards, etc., increase the content of active ingredients, and solve the problem of poor persistence , the effect of reducing pollution

Active Publication Date: 2013-05-29
NANJING REDSUN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of dosage forms, but all kinds of dosage forms have shortcomings in practical application, such as: emulsifiable concentrate, which uses a large amount of organic solvents, which is harmful to the environment; microemulsion, which not only uses polar solvents, but also uses a large amount of Surfactants have potential adverse effects on the environment; aqueous emulsions, affected by their physical and chemical properties, have low active ingredient content and poor persistence; microcapsule suspensions have poor quick-acting properties and low active ingredient content

Method used

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  • Water-based new preparation formulation ZW of chlorpyrifos, and processing and application thereof
  • Water-based new preparation formulation ZW of chlorpyrifos, and processing and application thereof
  • Water-based new preparation formulation ZW of chlorpyrifos, and processing and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The processing method of the new dosage form of chlorpyrifos ZW in this example is as follows: first, 10% chlorpyrifos CS is processed by the interface polymerization method, and 10% chlorpyrifos EW is processed by the conventional method, and the two are uniformly mixed according to the mass ratio of 3:7 to obtain 10% chlorpyrifos ZW.

[0044] Table 1: Mixture of chlorpyrifos microcapsule suspension processed by interfacial polymerization and aqueous emulsion processed by conventional method

[0045]

[0046] The prepared 10% chlorpyrifos new dosage form ZW can meet the following technical indicators: suspension rate ≥ 93%; emulsion stability qualified; cyst formation rate ≥ 91%; automatic dispersibility ≥ 90%; pH value qualified; cold storage indicators Qualified; all indicators of heat storage are qualified; all indicators of freeze-thaw stability are qualified.

Embodiment 2

[0048] The processing method of the new dosage form of chlorpyrifos ZW in this example is as follows: first, 20% chlorpyrifos CS is processed by the interfacial polymerization method, and 30% chlorpyrifos EW is processed by the conventional method, and the two are uniformly mixed according to the mass ratio of 7:3 to obtain 23% chlorpyrifos ZW.

[0049] Table 2: Mixture of chlorpyrifos microcapsule suspension processed by interfacial polymerization and aqueous emulsion processed by conventional method

[0050]

[0051] The prepared 23% chlorpyrifos new dosage form ZW can meet the following technical indicators: suspension rate ≥ 94%; emulsion stability qualified; cyst formation rate ≥ 90%; automatic dispersibility ≥ 91%; pH value qualified; cold storage indicators Qualified; all indicators of heat storage are qualified; all indicators of freeze-thaw stability are qualified.

Embodiment 3

[0053] The processing method of the new dosage form of chlorpyrifos ZW in this example is as follows: firstly, the interfacial polymerization method is used to process chlorpyrifos CS, and after the CS is formed into capsules and solidified, the oil phase of chlorpyrifos (including chlorpyrifos, toluene, and emulsifier) ​​is added, and the proportions are shown in the table below. 30% Chlorpyrifos ZW.

[0054] Table 3: Formula ratio of 30% chlorpyrifos ZW dosage form

[0055]

[0056] The prepared 30% chlorpyrifos new dosage form can meet the following technical indicators: suspension rate ≥ 94%; emulsion stability qualified; cyst formation rate ≥ 90%; automatic dispersibility ≥ 91%; pH value qualified; cold storage indicators qualified All indexes of heat storage are qualified; all indexes of freeze-thaw stability are qualified.

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Abstract

The invention discloses a new preparation formulation containing chlorpyrifos, and a processing method and application thereof, belonging to the technical field of pesticide production and processing. The new preparation formulation ZW containing chlorpyrifos is a microcapsule suspending agent-water emulsion formed by mixing a chlorpyrifos microcapsule suspending agent and a chlorpyrifos water emulsion and comprises the following components in percentage by mass: 0.5-60% of chlorpyrifos, 1-25% of solvent, 1-20% of encapsulating agent, 1-10% of surfactant, 1-10% of antifreezing agent, 0.01-1% of thickener, 0.01-5% of pH regulator, 0.01-1% of defoaming agent, 0.01-1% of preservative and the balance of water. The invention also provides application of the new preparation formulation containing chlorpyrifos in the field of agricultural pest control. The preparation lowers the consumption of organic solvent, reduces the harm to the environment, has favorable fast-acting property and long-acting property, and is stable in performance and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of pesticide production and processing, specifically relates to a new dosage form containing chlorpyrifos and its processing method and application, in particular to a microcapsule suspension-water emulsion formed by mixing chlorpyrifos microcapsule suspension and chlorpyrifos water emulsion and Its processing method and application. Background technique [0002] Chlorpyrifos Clorpyrifos, chemical name O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate, molecular formula C 9 h 11 Cl 3 NO 3 PS, the chemical structural formula is as follows: [0003] [0004] Chlorpyrifos is a phosphorothioate organic phosphorus insecticide with contact, stomach poisoning and fumigation effects. It is used in corn, cotton, rice, soybean, peanut, sugar beet, fruit trees and vegetables to control various soil and foliar pests. The residual period on the leaves is not long, but the residual period in the soil is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/16A01N25/04A01N25/28A01P7/04
Inventor 齐武彭永强刘德友张宝俊石振龙
Owner NANJING REDSUN
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