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A microporous sponge-like slow-release pesticide block and preparation method thereof

A microporous sponge and slow-release pesticide technology, applied in the field of pesticides, can solve the problems of unstable release of pesticide active ingredients, complex preparation process, low preparation content, etc., to achieve the effect of improving biodegradability and reducing environmental pollution

Active Publication Date: 2018-02-23
GAUNGXI TIANYUAN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the microcapsule slow-release pesticides use polyurethane as the wall material, but the preparation process of microcapsule slow-release pesticides using polyurethane as the wall material requires the use of harmful solvents such as lower alcohols, ketones, and aromatic hydrocarbons, which increases the environmental pressure; and the The biodegradability of pesticides is poor, which will cause the release of active ingredients of pesticides to be unstable or not released, and the expected effect cannot be achieved; and there are also problems such as complicated preparation process and low preparation content.

Method used

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  • A microporous sponge-like slow-release pesticide block and preparation method thereof
  • A microporous sponge-like slow-release pesticide block and preparation method thereof
  • A microporous sponge-like slow-release pesticide block and preparation method thereof

Examples

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preparation example Construction

[0029] The preparation method of embodiment 1~5 and comparative example 1~5 is as follows:

[0030] 1) After mixing polyols, biomaterials, pesticide active ingredients, thickeners, emulsifiers, and dispersants, cut them with a high-speed shear for 5-20 minutes, add them to a sand mill, and grind them to a particle size of D 90 ≤10μm, obtain polyol preparatory solution A;

[0031] 2) After adding silicon surfactant, hardener, catalyst and foaming agent to the polyol preparatory solution A, stir vigorously for 8 seconds to 10 minutes to obtain the polyol preparatory solution B;

[0032] 3) Add the polyisocyanate to the polyol preparatory solution B, stir evenly, and let stand to foam for 1min to 24h;

[0033] 4) After the mixed solution no longer foams, cut the obtained microporous spongy foam containing pesticide active ingredients into a regular shape to obtain a microporous spongy slow-release pesticide block.

[0034] Table 1 The weight percentages of the ingredients in th...

Embodiment 60

[0039] Embodiment 60.5% abamectin microcapsule suspension

[0040] Each component weight percentage of formula forms:

[0041] 16% Abamectin slow-release block prepared by 3.2% embodiment 2, 0.5% polycarboxylate, 3% arylphenol polyoxyethylene polyoxypropylene ether phosphate triethanol ammonium salt, 1% isooctyl succinate Sodium Acid, 3% Glycol, 1% Magnesium Aluminum Silicate, 0.12% Xanthan Gum, Water Make Up 100%.

[0042] Preparation:

[0043] 1) The 16% Abamectin sustained-release block prepared in Example 2 is pulverized to 100-150 mesh by air flow;

[0044] 2) Take by weighing 3.2g16% Abamectin sustained-release block powder, 0.5g polycarboxylate, 3g arylphenol polyoxyethylene polyoxypropylene ether phosphate triethanol ammonium salt, 1g isooctyl sodium succinate, 3g of ethylene glycol, 1g of magnesium aluminum silicate, 0.12g of xanthan gum, 100% of water, high-speed shearing for 3min, and then wet sanding to 150-200 mesh to obtain 0.5% abamectin microcapsule suspensi...

Embodiment 71

[0050] Example 7 1.5% tebuconazole sustained-release powder

[0051] Each component weight percentage of formula forms:

[0052] 46.9% of the 3.2% tebuconazole slow-release block prepared in Example 3, 12% white carbon black, 15% lignosulfonate, and kaolin make up 100%.

[0053] Preparation:

[0054] 1) The 3.2% tebuconazole sustained-release block prepared in Example 3 was pulverized by air flow to 100-150 mesh;

[0055] 2) Weigh 46.9g of 3.2% tebuconazole slow-release block powder, 12g of white carbon black, 15g of lignin sulfonate, and the remainder of kaolin, mix well, and air-jet mill to obtain 1.5% tebuconazole slow-release powder .

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Abstract

The invention discloses a microporous sponge slow-releasing pesticide block and a preparation method thereof. The pesticide block is prepared from, by weight, 0.1-15% of pesticide active components, 30-50% of polyisocyanates, 25-45% of polyol, 5-30% of biological materials, 0.1-5% of a thickening agent, 1-12% of an emulsifying agent, 0.5-4% of a dispersing agent, 0.2-2% of silicon surfactant, 0.2-2% of a hardening agent, 0.1-1% of catalyst and 5-14.5% of a foaming agent. By means of the microporous sponge slow-releasing pesticide block, pesticide releasing time can be adjusted according to incidence characteristics of crop disease and insect pests. Besides, chitin, cellulose, starch and other biological materials are introduced into a polyurethane foaming material in the pesticide block, biodegradability of the pesticide block can be improved, and environment pollution caused by wall materials is reduced in the pesticide application process. Compared with a traditional pesticide microcapsule suspending agent prepared with polyurethane as the wall materials, the pesticide block has the advantage that use of harmful solvents such as low alcohols, ketones and aromatic solvents is avoided.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a microporous sponge-like slow-release pesticide block and a preparation method thereof. Background technique [0002] At present, most of the microcapsule slow-release pesticides use polyurethane as the wall material, but the preparation process of microcapsule slow-release pesticides using polyurethane as the wall material requires the use of harmful solvents such as lower alcohols, ketones, and aromatic hydrocarbons, which increases the environmental pressure; and the The biodegradability of pesticides is poor, which will cause the release of active ingredients of pesticides to be unstable or not released, and the expected effect cannot be achieved; and there are also problems such as complicated preparation process and low preparation content. [0003] For this reason, the inventor has conducted a lot of research on slow-release pesticides, and found that the introduction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/18A01N25/16A01N43/90A01N43/54A01N43/653A01P7/04A01P3/00A01P7/02
CPCA01N25/16A01N25/18A01N43/54A01N43/653A01N43/90
Inventor 石继平卢瑞石仕福韦冰
Owner GAUNGXI TIANYUAN BIOCHEM
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