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Pyrethroid pesticide water-dispersible tablets

A pyrethroid and water technology, which is used in the preparation of pyrethroid pesticide water-dispersible tablets, and the field of pyrethroid pesticide water-dispersible tablets, can solve the problem of pesticide decomposition failure and reduced stability of water-dispersible tablets , poor dispersion of active ingredients of pesticides, etc., to improve formulation stability, reduce hydrolysis loss, and achieve good water solubility and dispersion effects.

Inactive Publication Date: 2013-09-11
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-dispersible tablets are prone to problems such as unsatisfactory disintegration and poor dispersion of active ingredients of pesticides after disintegration.
When organic acids containing active hydrogen such as citric acid and carbonates such as sodium carbonate are used as effervescent agents, the organic acid and carbonate will still react slowly in the solid state to generate water and release carbon dioxide, resulting in a decrease in the stability of the water-dispersible tablet. Decomposition failure of some pyrethroid insecticides

Method used

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  • Pyrethroid pesticide water-dispersible tablets
  • Pyrethroid pesticide water-dispersible tablets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composition is: 20 parts of fenpropathrin, 20 parts of beta-cypermethrin, 14 parts of 1,3-dihexylimidazole tetrafluoroborate, 4 parts of fatty alcohol polyoxyethylene ether, 10 parts of NaHCO 3 , 10 parts of anhydrous aluminum sulfate, 5 parts of sodium lignosulfonate, 1 part of sodium dodecylbenzene sulfonate, 5 parts of polyacrylamide, 6 parts of calcium chloride, 5 parts of ultrafine silica.

[0021] The preparation method is as follows: firstly mix fenpropathrin, beta-cypermethrin, 1,3-dihexylimidazolium tetrafluoroborate and anhydrous aluminum sulfate, and set aside. Then fatty alcohol polyoxyethylene ether, NaHCO 3 , sodium lignosulfonate, sodium dodecylbenzenesulfonate, polyacrylamide, calcium chloride and ultrafine silicon dioxide are fully mixed, and made to reach 325 meshes by ultrafine grinding, and are set aside; then the above two The mixture is mixed evenly, and directly pressed into tablets to obtain the pyrethroid pesticide water-dispersible tablet....

Embodiment 2

[0023] Composition: 22 parts cyfluthrin, 14 parts lauryl imidazole benzoate, 4 parts sodium laureth sulfate, 6 parts NaHCO 3 , 4 parts of calcium carbonate, 10 parts of anhydrous aluminum sulfate, 5 parts of sodium lignosulfonate, 1 part of sodium lauryl sulfate, 5 parts of polyvinylpyrrolidone, 6 parts of calcium chloride, 5 parts of ultrafine titanium dioxide.

[0024] The preparation method is as follows: firstly mix cyfluthrin, dodecyl imidazole benzoate and anhydrous aluminum sulfate, and set aside. Then sodium lauryl polyoxyethylene sulfate, NaHCO 3 , calcium carbonate, sodium lignosulfonate, sodium lauryl sulfate, polyvinylpyrrolidone, calcium chloride and ultra-fine titanium dioxide are fully mixed, and ultrafinely pulverized to make it reach 325 mesh, and then used; then the above two mixtures Mix evenly, and directly press into tablets to obtain the described pyrethroid pesticide water-dispersible tablet.

Embodiment 3

[0026] The composition is: 20 parts cyhalothrin, 20 parts deltamethrin, 14 parts dodecyl imidazole benzoate, 4 parts sodium lignosulfonate, 6 parts NaHCO 3 , 4 parts of calcium carbonate, 10 parts of anhydrous aluminum sulfate, 2 parts of polyvinylpyridine, 4 parts of sodium lauryl sulfate, 5 parts of polyvinylpyrrolidone, 5 parts of sodium chloride, 3 parts of ultrafine silica, 3 parts Ultrafine Titanium Dioxide.

[0027] The preparation method is as follows: firstly mix cyfluthrin, deltamethrin, dodecyl imidazole benzoate and anhydrous aluminum sulfate, and set aside. NaHCO 3 , calcium carbonate, sodium lignosulfonate, sodium lauryl sulfate, polyvinylpyrrolidone, sodium chloride and ultrafine titanium dioxide are fully mixed, and ultrafinely pulverized to make it reach 325 mesh, and then used; then the above two mixtures Mix evenly, and directly press into tablets to obtain the described pyrethroid pesticide water-dispersible tablet.

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Abstract

The invention discloses pyrethroid pesticide water-dispersible tablets. The tablets comprise the following components in part by weight: 1.0 to 40.0 parts of pyrethroid insecticides, 0 to 80.0 parts of ester bond-containing insecticide, 1.0 to 20.0 parts of ion liquid surfactant, 0.5 to 25.0 parts of wetting dispersant, 1.0 to 20.0 parts of effervescent agent, 0.5 to 30.0 parts of disintegrant, 1.0 to 10.0 parts of forming agent and 0.5 to 60.0 parts of filler. A preparation process comprises the following steps of: 1) mixing the pyrethroid insecticides, the insecticide containing ester bonds, an acid agent which does not contain active hydrogen in the effervescent agent and the ion liquid surfactant; and 2) crushing carbonate in the effervescent agent, the wetting dispersant, the formingagent, the disintegrant and the filler and mixing, uniformly mixing the obtained mixture and a mixture obtained in step 1), and tabletting by a direct tabletting method to obtain the water-dispersible tablets.

Description

technical field [0001] The invention relates to pyrethroid insecticidal pesticides, especially a water-dispersible tablet of pyrethroid pesticides, and a preparation method of the water-dispersible tablet of pyrethroid pesticides. Background technique [0002] With the improvement of environmental protection and agricultural product safety requirements, pyrethroid pesticides have rapidly replaced other highly toxic and high-residue pesticides and become very important pesticides for the prevention and control of agricultural pests, and are widely used in household and urban environmental sanitation and other fields. At present, the main processing formulations of pyrethroid insecticides are emulsifiable concentrate, wettable powder, water emulsion, microemulsion, aerosol, water dispersible tablet and so on. Among them, the dosage of water-dispersible tablets is easy to control, convenient for storage and transportation, conducive to environmental safety, and has broad devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N53/08A01N47/22A01N25/34A01P7/04
Inventor 殷耀兵马计斌高会东
Owner HEBEI UNIV OF ENG
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