Cycloxaprid flying prevention preparation and preparation method thereof

Abstract

The invention relates to the technical field of pesticide preparations, in particular to a cycloxaprid flying prevention preparation and a preparation method thereof.The cycloxaprid flying prevention preparation is at least prepared from, by mass, 10-30% of cycloxaprid active compound, 2-5% of wetting agent, 10-20% of dispersing grinding aid, 5-10% of stabilizer and the balance filler. The use effect and compound characteristics of cycloxaprid are fully exerted, so that the particle size of the product meets the flight control requirement, the actual agricultural production and use are met, and the pesticide utilization rate is increased.

Description

Technical Field

[0001] This invention relates to the field of pesticide formulation technology, specifically to an epoxim-propargyl aerial spraying formulation and its preparation method. Background Technology

[0002] Epoxychloride has a novel chemical structure and mechanism of action, and a broad insecticidal spectrum. This agent has excellent insecticidal activity against most pests of the order Homoptera, especially rice planthoppers, aphids, and whiteflies. It is also effective against pests of the orders Lepidoptera, Coleoptera, and Diptera. It has high efficacy, no cross-resistance, no phytotoxicity to crops, low toxicity, and low residue. Its activity against resistant pests is superior to imidacloprid. It can be used in agriculture and horticulture such as rice, vegetables, fruit trees, wheat, cotton, and corn. It can be used for foliar treatment or seed treatment.

[0003] Currently, epoxim formulations include wettable powder, suspension concentrate, water-dispersible granules, and effervescent tablets. However, these formulations have certain limitations in practical applications. For example, the existing registered 25% epoxim wettable powder does not meet the requirements for aerial spraying applications. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an epoxychloride aerial spraying formulation. By optimizing the pulverization method and formulation of this product, the efficacy and compound characteristics of epoxychloride are fully utilized, ensuring that the product particle size meets the requirements for aerial spraying, satisfying actual agricultural production needs, and improving pesticide utilization.

[0005] The present invention provides an epoxim-based aerial spraying formulation, which, by weight percentage, comprises at least the following raw materials: 10-30% epoxim technical grade, 2-5% wetting agent, 10-20% dispersant and grinding aid, 5-10% stabilizer, and filler to make up the balance.

[0006] In one embodiment, the epoxim-based aerial spraying formulation comprises, by weight percentage, the following raw materials: 20-25% epoxim technical grade, 3-4% wetting agent, 14-16% dispersant and grinding aid, 7-8% stabilizer, and filler to make up the balance.

[0007] In one embodiment, the wetting agent is selected from at least one of anionic surfactants or nonionic surfactants.

[0008] In one embodiment, the wetting agent is selected from at least one of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, sodium dibutylnaphthalene sulfonate, or sodium dodecyl sulfate.

[0009] In one embodiment, the dispersing grinding aid comprises at least sodium lignosulfonate and naphthalenesulfonate compounds.

[0010] In one embodiment, the mass ratio of the sodium lignin sulfonate to the naphthalene sulfonate compound is (7-8):(7-8).

[0011] In one embodiment, the sodium lignin sulfonate is selected from at least one of Ultrazine NA or BorresperseNA.

[0012] Both Ultrazine NA and Borresperse NA are derived from Borregaard.

[0013] In one embodiment, the type of the naphthalene sulfonate compound is selected from... D-400 or At least one of D-425.

[0014] The D-400 or All D-425s are manufactured by Shanghai Tongshi Technology Co., Ltd.

[0015] The epoxy imidacloprid aerial spraying formulation provided by this invention optimizes the selection and combination of wetting agents and dispersing and grinding aids in the system. In particular, it uses sodium dodecyl sulfate in combination with sodium lignosulfonate and naphthalene sulfonate compounds to ensure that the subsequent spray solution can be quickly wetted and spread upon contact with the leaves and remain uniformly suspended throughout the entire application process.

[0016] In one embodiment, the stabilizer is selected from at least one of polyvinyl alcohol, polyacrylamide, potassium chloride, or potassium dihydrogen phosphate.

[0017] This invention optimizes the system by introducing stabilizers, especially potassium dihydrogen phosphate, which effectively increases the ionic strength and conductivity of the pesticide solution, reduces the number of easily evaporating and drifting fine droplets during aerial spraying, increases the proportion of medium-sized droplets, and makes the droplets larger, heavier, and more uniform, thereby effectively reaching the target crop.

[0018] In one embodiment, the filler is selected from at least one of barium sulfate, kaolin, diatomaceous earth, talc, bentonite, sodium sulfate, or calcium carbonate.

[0019] Another aspect of the present invention provides a method for preparing an epoxim-propargyl aerial control formulation, comprising at least the following steps:

[0020] S1. Add epoxim technical, wetting agent, dispersant and grinding aid, stabilizer, filler and water to a reaction vessel for shearing and homogenization to obtain sheared material;

[0021] S2. Feed the sheared material into a two-stage series sand mill at a feed rate of 3-5 L / min for wet grinding. When the particle size D90≤3μm, stop the sand milling to obtain abrasive material.

[0022] S3. Spray fluidized drying of abrasive sand to obtain epoxy imidacloprid aerial spraying formulation.

[0023] In one embodiment, the amount of water added in step S1 is 90-120% of the total weight of the raw materials for the epoxim-propargyl aerial spraying agent.

[0024] In one embodiment, the amount of water added in step S1 is 100% of the total weight of the raw materials for the epoxim-propargyl aerial spraying agent.

[0025] In one embodiment, the parameters of the fluidized spray drying include: an inlet air temperature of 115-120°C, an outlet air temperature of 68-70°C, a feed pressure of 0.3-0.5 MPa, and a feed rate of 25-28 L / min.

[0026] In one embodiment, the powder particle size of the epoxim-propargyl aerial spraying agent is D50≤1μm, D90≤2μm, and D98≤3μm.

[0027] This invention achieves thorough wetting and pre-dispersion by adding water to all raw materials for shear homogenization, forming a uniform sheared material. This effectively avoids the uneven mixing problems that may occur with dry mixing and facilitates subsequent efficient sand milling. Furthermore, abrasive particles with a D90 ≤ 3μm are obtained through two-stage series sand milling, improving suspension rate and efficacy. The wet grinding production environment is also safer and more environmentally friendly. Furthermore, by optimizing the parameters of fluidized spray drying, the activity and stability of the active ingredients and adjuvants are maintained to the maximum extent, avoiding degradation, inactivation, or agglomeration caused by high temperatures. This ensures that production capacity and spray atomization effect are met while maintaining product moisture content within limits, resulting in a wettable powder with good flowability and rapid disintegration, better meeting the needs of aerial spraying applications.

[0028] The preparation process of the epoxim-propargyl aerial spraying formulation provided by this invention is simple and efficient, and the particle size of the formulation meets the requirements for aerial spraying, effectively improving the field application effect of the formulation. It is environmentally friendly, can be mixed with different pesticide tanks, has good compatibility, and can meet the applicable needs of different application scenarios.

[0029] This invention effectively improves the permeability and conductivity of the formulation within the plant, promoting the translocation of epoxim from the application site to new tissues (such as the top leaf) or the feeding sites of target pests, thereby enhancing the formulation's rapid action, sustained effect, and efficacy.

[0030] Beneficial effects

[0031] 1. This invention provides an epoxychloride aerial spraying formulation. By optimizing the pulverization method and formula of this product, the efficacy and compound characteristics of epoxychloride are fully utilized, so that the particle size of the product meets the requirements for aerial spraying, satisfies the actual agricultural production use, and improves the pesticide utilization rate.

[0032] 2. The epoxy imidacloprid aerial spraying formulation provided by this invention optimizes the selection and combination of wetting agents and dispersing and grinding aids in the system. In particular, it uses sodium dodecyl sulfate in combination with sodium lignosulfonate and naphthalene sulfonate compounds to ensure that the subsequent spray solution can be quickly wetted and spread upon contact with the leaves and remain uniformly suspended throughout the entire application process.

[0033] 3. The preparation process of the epoxim-propargyl aerial spraying formulation provided by this invention is simple and efficient, and the particle size of the formulation meets the requirements for aerial spraying, effectively improving the field application effect of the formulation. It is environmentally friendly, can be mixed with different pesticide tanks, has good compatibility, and can meet the applicable needs of different application scenarios.

[0034] 4. This invention effectively improves the permeability and conductivity of the formulation within the plant, promoting the translocation of epoxim from the application site to new tissues (such as the top leaf) or the feeding site of the target pest, thereby improving the formulation's rapid action, sustained effect, and efficacy. Detailed Implementation

[0035] Example 1

[0036] Example 1 of the present invention provides an epoxychlorpyrifos aerial spraying formulation, which, by mass percentage, comprises the following raw materials: 25% epoxychlorpyrifos technical, 3% wetting agent, 15% dispersant and grinding aid, 8% stabilizer, and filler to make up the balance.

[0037] The wetting agent is sodium dodecyl sulfate.

[0038] The dispersing grinding aid comprises sodium lignosulfonate and naphthalene sulfonate compounds, wherein the mass ratio of sodium lignosulfonate to naphthalene sulfonate compounds is 8:7.

[0039] The sodium lignosulfonate is designated Borresperse NA, which is derived from Borregaard.

[0040] The type of the naphthalene sulfonate compound is: D-425, the aforementioned

[0041] D-425 is manufactured by Shanghai Tongshi Technology Co., Ltd.

[0042] The stabilizer is potassium dihydrogen phosphate.

[0043] The filler is barium sulfate.

[0044] Example 1 of the present invention provides a method for preparing an epoxiconazole-based aerial spray formulation, comprising the following steps:

[0045] S1. Add epoxim technical, wetting agent, dispersant and grinding aid, stabilizer, filler and water to a reaction vessel for shearing and homogenization to obtain sheared material;

[0046] S2. Feed the sheared material into a two-stage series sand mill at a feed rate of 4L / min for wet grinding. When the particle size D90≤3μm, stop the sand milling to obtain abrasive material.

[0047] S3. Spray fluidized drying of abrasive sand to obtain epoxy imidacloprid aerial spraying formulation.

[0048] In step S1, the amount of water added is 100% of the total weight of the raw materials for the epoxim-propargyl aerial spraying agent.

[0049] The parameters of the fluidized spray drying include: inlet air temperature of 115℃, outlet air temperature of 68℃, feed pressure of 0.3MPa, and feed rate of 28L / min.

[0050] Example 2

[0051] Example 2 of the present invention provides an epoxim-based aerial spraying formulation and its preparation method. The specific implementation method is the same as that of Example 1, except that the mass ratio of sodium lignosulfonate and naphthalenesulfonate compound is 7:8, the sodium lignosulfonate is of the type Ultrazine NA, and Ultrazine NA is derived from Borregaard.

[0052] The type of the naphthalene sulfonate compound is: D-400, the aforementioned The D-400 is manufactured by Shanghai Tongshi Technology Co., Ltd.

[0053] Performance testing

[0054] 1. The physicochemical properties of the epoxim-propargyl aerial spraying formulations provided in Examples 1 and 2 were tested and compared with those of commercially available products (70% imidacloprid water-dispersible granules). The results are shown in Table 1.

[0055] Table 1

[0056] project index Example 1 Example 2 Commercially available Epoxypyr mass fraction, % 25.0±1.5 25.1 25.2 25.1 Suspension rate, % ≥ 85 100 100 95 Moisture,%≤ 3.0 0.5 0.5 0.6 pH value 7.0-10.0 9.5 9.5 9.5 Wetting time, s≤ 90 32 31 75 Prolonged foaming properties, (after 1 min) mL ≤ 60 10 12 31 Wet sieve test (passing through a 75μm standard sieve), % ≥ 96 100 100 97 Thermal storage stability (54℃±2℃), a qualified qualified qualified qualified

[0057] Analysis of the data in Table 1 shows that the epoxim-propargyl aerial spraying formulations provided in Examples 1 and 2 of this invention have better suspension rates and faster wetting times compared to commercially available products.

[0058] 2. The aerial application performance of the epoxim-acetamiprid aerial spraying formulations provided in Examples 1 and 2 was tested and compared with that of commercially available products (70% imidacloprid water-dispersible granules). The results are shown in Table 2.

[0059] Table 2

[0060]

[0061]

[0062] 3. The efficacy of the epoxim-propargyl aerial spraying formulations provided in Examples 1 and 2 against rice planthoppers was tested and compared with commercially available products. The results are shown in Table 3.

[0063] Table 3

[0064]

Claims

1. An epoxim-based aerial spraying formulation, characterized in that, The product comprises, by weight percentage, at least the following raw materials: 10-30% epoxim technical grade, 2-5% wetting agent, 10-20% dispersant and grinding aid, 5-10% stabilizer, and filler to make up the balance; the dispersant and grinding aid comprises at least sodium lignosulfonate and naphthalene sulfonate compounds.

2. The epoxim-propargyl aerial spraying formulation according to claim 1, characterized in that, The wetting agent is selected from at least one of anionic surfactants or nonionic surfactants.

3. The epoxim-propargyl aerial spraying formulation according to claim 2, characterized in that, The wetting agent is selected from at least one of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, sodium dibutylnaphthalene sulfonate, or sodium dodecyl sulfate.

4. The epoxim-propargyl aerial spraying formulation according to claim 1, characterized in that, The mass ratio of sodium lignosulfonate to naphthalenesulfonate is (5-10):(5-10).

5. The epoxim-propargyl aerial spraying formulation according to claim 4, characterized in that, The mass ratio of sodium lignosulfonate to naphthalenesulfonate is (7-8):(7-8).

6. The epoxim-propargyl aerial spraying formulation according to claim 1, characterized in that, The stabilizer is selected from at least one of polyvinyl alcohol, polyacrylamide, potassium chloride, or potassium dihydrogen phosphate.

7. The epoxim-propargyl aerial spraying formulation according to claim 1, characterized in that, The filler is selected from at least one of barium sulfate, kaolin, diatomaceous earth, talc, bentonite, sodium sulfate, or calcium carbonate.

8. A method for preparing an epoxim-based aerial spray formulation according to any one of claims 1-7, characterized in that, At least the following steps are included: S1. Add epoxim technical, wetting agent, dispersant and grinding aid, stabilizer, filler and water to a reaction vessel for shearing and homogenization to obtain sheared material; S2. Feed the sheared material into a two-stage series sand mill at a feed rate of 3-5 L / min for wet grinding. When the particle size D90≤3μm, stop the sand milling to obtain abrasive material. S3. Spray fluidized drying of abrasive sand to obtain epoxy imidacloprid aerial spraying formulation.

9. The preparation method of the epoxim-propargyl aerial spraying formulation according to claim 8, characterized in that, The parameters of the fluidized spray drying include: inlet air temperature of 115-120℃, outlet air temperature of 68-70℃, feed pressure of 0.3-0.5MPa, and feed rate of 25-28L / min.

10. The preparation method of the epoxim-propargyl aerial spraying formulation according to claim 8, characterized in that, The powder particle size of the epoxim-acetic acid aerial spraying formulation is D50≤1μm, D90≤2μm, and D98≤3μm.

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