Synergist for sterilant herbicide and preparation process thereof

Abstract

The invention relates to the field of synergists, aims to solve the problems of crop phytotoxicity, environmental pollution and the like possibly caused by application of excessive herbicides, and provides a synergist which comprises the following components in parts by weight: 50-55 parts of ammonium sulfate, 27-37.5 parts of anhydrous sodium sulfate, 8-10 parts of a dispersing agent, 3-5 parts of potassium fulvate, 1-2 parts of a wetting agent and 0.5-1 part of ethyoxyl modified trisiloxane. The synergist obtained by compounding the raw materials can effectively improve the use effect of the herbicide; the dispersing agent can form a protective film on the surfaces of pesticide particles, so that the pesticide particles are prevented from being broken or agglomerated due to mutual collision, the surface tension between water and pesticide powder is reduced, and the solubility and stability of the pesticide are enhanced; ethyoxyl modified trisiloxane can promote pesticide components to be spread on the surfaces of plants quickly and uniformly, promote the pesticide components to permeate into the plants and accelerate the conduction effect of the plants, so that the effect of the pesticide is greatly improved; the growth promoter can promote the absorption of the plant to the pesticide and the conduction of the pesticide in the plant body.

Description

Technical Field

[0001] The present invention relates to the field of synergists, in particular to a synergist for a lethal herbicide and a preparation process thereof. Background Art

[0002] Herbicide synergists, also known as adjuvants or additives, are substances used to enhance the effectiveness of herbicides. They improve the effectiveness of herbicides through various mechanisms, including but not limited to increasing herbicide adhesion to plant surfaces, promoting absorption, and reducing volatilization and photolytic losses.

[0003] There is an urgent need for a synergist that can reduce the amount of herbicide used and to a certain extent solve the problems of crop damage and environmental pollution that may be caused by excessive use of herbicides. Summary of the Invention

[0004] The purpose of the present invention is to provide a synergist for a lethal herbicide and a preparation process thereof, so as to solve the problems of crop damage and environmental pollution that may be caused by excessive application of herbicides.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A synergist for a lethal herbicide comprises, by weight, 50-55 parts of ammonium sulfate, 27-37.5 parts of anhydrous sodium sulfate, 8-10 parts of a dispersant, 3-5 parts of potassium fulvate, 1-2 parts of a wetting agent, and 0.5-1 part of ethoxy-modified trisiloxane.

[0007] Ammonium sulfate is used as a plant stem and leaf growth promoter, promoting growth, accelerating crop metabolism, and improving drug delivery within the plant. Ammonium sulfate is rich in nitrogen, a fundamental building block of important biomolecules in plants, including proteins, enzymes, chlorophyll, and nucleic acids. These substances are crucial for plant metabolism, photosynthesis, and cell division. An adequate nitrogen supply promotes rapid growth and expansion of plant stems and leaves. Nitrogen is also a component of certain plant hormones, such as cytokinins. Cytokinins regulate plant cell division and expansion, positively impacting the activity of the shoot and root apical meristems, thereby promoting stem and leaf growth. While ammonium sulfate primarily provides a nitrogen source, it also contains sulfur, an essential trace nutrient for plants and crucial for the formation of amino acids and proteins. The presence of sulfur helps maintain nutritional balance within the plant, indirectly supporting the healthy development of stems and leaves.

[0008] Potassium fulvate is used as a plant root growth promoter, promoting root growth. Strong roots facilitate the absorption of pesticide active ingredients, thereby enhancing efficacy. Potassium fulvate can improve soil physical properties, increase the stability of soil aggregate structure, and enhance soil aeration and water permeability. This helps plant roots expand and penetrate deeper into the soil, absorbing water and nutrients. Potassium fulvate has strong ion exchange and chelation properties, which can fix nutrients (such as nitrogen, phosphorus, potassium, and trace elements) in the soil, reducing their loss and gradually releasing them to plants in a usable form, thereby improving fertilizer utilization and promoting effective nutrient absorption by plant roots. Potassium fulvate can stimulate the synthesis of various physiologically active substances in plants, such as endogenous plant hormones such as auxin and cytokinin. These hormones have a direct effect on root development, helping to increase root length, root mass, and root vitality. Potassium fulvate regulates metabolic processes within plants, enhancing their resistance to adverse environmental conditions (such as drought, cold, and salinity). A healthy root system is an important foundation for plants to withstand stress. Therefore, using potassium fulvate helps build strong root systems and improve the plant's overall stress resistance. Adding potassium fulvate to the soil also promotes the growth and activity of beneficial microorganisms. These microorganisms play an important role in decomposing organic matter, converting soil nutrients, and inhibiting pathogens, indirectly promoting the healthy growth of plant roots.

[0009] Anhydrous sodium sulfate is used as a filler. As an inorganic salt, sodium sulfate improves the formulation's physical properties, such as flowability and dispersibility. This is crucial for ensuring the even distribution of the herbicide and synergist in the target area. Sodium sulfate also regulates the solution's osmotic pressure, helping to control the rate of herbicide penetration into the plant. Properly adjusting osmotic pressure can help improve the effective absorption of the herbicide, thereby enhancing its effectiveness.

[0010] Ethoxy-modified trisiloxane is used as a spreader and penetrant. Its main function is to promote the rapid and uniform spreading of pesticide ingredients on the plant surface, promote the penetration of pesticide ingredients into the plant interior, accelerate plant conduction, and thus greatly improve the effect of pesticides.

[0011] Ethoxy-modified trisiloxanes can significantly reduce the surface tension of aqueous solutions. This is because the siloxane portion has low surface energy, while the ethoxy portion can form hydrogen bonds with water. This combination enables the compound to effectively spread at liquid-air or liquid-solid interfaces, thereby reducing the surface tension of the entire solution system and helping the liquid to better wet and penetrate the target surface. Due to its special chemical structure, ethoxy-modified trisiloxanes can greatly improve the spreading ability of liquids on solid surfaces. This helps ensure that the liquid is evenly coated on plant surfaces, soil particles, or other treated surfaces, thereby enhancing the effectiveness of subsequent applications. Ethoxy-modified trisiloxanes can promote the ability of liquids to pass through natural barriers such as cell walls or the epidermis. It can help overcome the waxy layer or hydrophobic areas on the plant epidermis, allowing water and other dissolved substances (such as nutrients or active ingredients) to more easily penetrate into plant tissues, thereby improving bioavailability and efficacy.

[0012] Preferably, the dispersant includes sodium tripolyphosphate.

[0013] The function of sodium tripolyphosphate: it can form a protective film on the surface of pesticide particles to prevent pesticide particles from breaking or agglomerating due to mutual collision; at the same time, it reduces the surface tension between water and pesticide powder, and enhances the solubility and stability of pesticides.

[0014] The phosphate ions produced by STPP's dissociation in water can adsorb onto the particle surfaces, increasing the negative charge density. Because like charges repel each other, this electrostatic repulsion effectively prevents particle aggregation, maintaining a well-dispersed state. STPP forms stable, soluble complexes or chelates with polyvalent metal ions such as calcium and magnesium in water, thereby reducing particle flocculation caused by these ions. By reducing water hardness, STPP helps maintain suspension stability and prevents precipitation and aggregation caused by hard water components. In addition to electrostatic repulsion, STPP molecules also form a protective film on the particle surface. This film creates a physical barrier between particles, known as "steric hindrance," further preventing direct contact between particles and helping to maintain well-dispersed particles. STPP improves the overall flowability of the mixture, which is beneficial for processing performance during production, such as pumping.

[0015] Preferably, the wetting agent includes: sodium lauryl sulfate polyoxyethylene ether.

[0016] The function of sodium lauryl sulfate polyoxyethylene ether: increase the coverage of the plant surface when spraying pesticides, ensure that the pesticides are evenly distributed on the plant surface, and improve the effectiveness of pesticide use.

[0017] AES molecules consist of a hydrophilic head (typically a sulfate ion and a polyethylene oxide chain) and a hydrophobic tail (a long-chain hydrocarbon such as a dodecyl group). When added to water, these molecules align at the air-water interface, with the hydrophilic portion facing the water and the hydrophobic portion facing the air. This significantly reduces the surface tension of the solution, significantly lowering the surface tension of the solution. This ability allows liquids to spread more easily on solid surfaces. By reducing surface tension, AES helps reduce the contact angle of liquid droplets on solid surfaces, meaning that liquids can spread more smoothly onto the surface rather than beading up. This is particularly important for promoting wetting of surfaces such as plants and soil by water or other solutions. AES not only reduces surface tension but also helps disperse water-insoluble substances. Its hydrophilic and hydrophobic ends interact with the aqueous medium and hydrophobic particles, respectively, preventing particle aggregation and maintaining a uniform dispersion, which improves the effectiveness of the herbicide during application. By forming micelles, AES can encapsulate some poorly water-soluble organic compounds, increasing their solubility in water.

[0018] Preferably, in the sodium lauryl sulfate polyoxyethylene ether, the mass ratio of sodium lauryl sulfate to polyoxyethylene ether is (1-3):1.

[0019] A preparation process of a synergist for a herbicide includes: mixing raw materials of the synergist, cooling and screening to obtain the synergist for the herbicide.

[0020] After the material has cooled to room temperature, it is filtered with a screening machine to remove coarse particles and then sampled for analysis and testing. Products that meet the quality standards will enter the packaging process or product production process for use, and the coarse particles or unqualified products that have passed the screening will be returned to the mixing and stirring process for re-production.

[0021] Preferably, the preparation process comprises:

[0022] The wetting agent and the ethoxy-modified trisiloxane are blended to obtain a mixed solution.

[0023] The mixed liquid is mixed with part of the solid raw material to obtain a first mixture, and the first mixture is mixed with the remaining solid raw material, and then cooled and sieved to obtain a synergist for the herbicide.

[0024] Since the amount of liquid raw material used in the present invention is much lower than that of solid raw material, if all the raw materials are mixed at once, the liquid raw material is difficult to be evenly distributed in the solid raw material. Therefore, the applicant first mixes the liquid raw material with part of the solid raw material, so that the liquid raw material first adheres to part of the solid raw material, and then mixes it with the remaining solid raw material. That is, by using part of the fixed raw material as a carrier of the liquid raw material, the uniform distribution of the liquid raw material in the system is simply achieved.

[0025] Preferably, the part of solid raw materials includes: sodium tripolyphosphate.

[0026] Preferably, sodium sulfate, anhydrous sodium sulfate and potassium fulvate are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, and then cooled and sieved to obtain a synergist for the herbicide.

[0027] Premixing reduces the mixing time between the first mixture and the remaining solids, thereby reducing the effect of frictional heat generated during mixing on the adhesion of the liquid raw materials. Anhydrous sodium sulfate absorbs moisture trapped between the materials.

[0028] Preferably, the cooling operation comprises: spreading the mixed raw materials at an ambient temperature of 40° C. to 50° C., letting them stand for 20 min to 45 min, and then cooling the raw materials to room temperature.

[0029] The purpose of laying the raw materials flat and letting them rest first is to allow moisture between the materials to enter the environment, thus preventing moisture from condensing directly on the surface of the raw materials during the cooling process. During the resting process, the moisture absorbed by the anhydrous sodium sulfate can also be released.

[0030] Preferably, the thickness of the raw materials laid flat is 1 cm-5 cm, and the ambient temperature during cooling is 10° C.-20° C.

[0031] The present invention has at least the following beneficial effects:

[0032] The synergist obtained by compounding the various raw materials of the present invention can effectively improve the use effect of the herbicide. The dispersant can form a protective film on the surface of the pesticide particles, preventing the pesticide particles from breaking or agglomerating due to mutual collision, while also reducing the surface tension between water and the pesticide powder, enhancing the solubility and stability of the pesticide. The ethoxy-modified trisiloxane can promote the rapid and uniform spreading of the pesticide components on the plant surface, promoting the pesticide components to penetrate into the plant interior, accelerating the plant conduction effect, and thus greatly improving the effect of the pesticide. The growth promoter can promote the plant's absorption of the pesticide and the conduction of the drug within the plant. During the mixing process of these raw materials, anhydrous sodium sulfate absorbs water vapor and can also regulate the penetration rate of the herbicide molecules into the plant body, helping to increase the effective absorption of the herbicide and thus enhancing its effect. DETAILED DESCRIPTION

[0033] In order to make the purpose, method scheme and advantages of the embodiments of the present invention clearer, the method scheme in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1: A synergist for a lethal herbicide, comprising, by weight: 50 parts of ammonium sulfate, 37.5 parts of anhydrous sodium sulfate, 10 parts of sodium tripolyphosphate, 5 parts of potassium fulvate, 2 parts of sodium lauryl sulfate polyoxyethylene ether, and 1 part of ethoxy-modified trisiloxane, wherein the mass ratio of sodium lauryl sulfate to polyoxyethylene ether in the sodium lauryl sulfate polyoxyethylene ether is 1:1.

[0035] Example 2: A synergist for a lethal herbicide, comprising, by weight: 55 parts of ammonium sulfate, 37.5 parts of anhydrous sodium sulfate, 10 parts of sodium tripolyphosphate, 5 parts of potassium fulvate, 2 parts of sodium lauryl sulfate polyoxyethylene ether, and 1 part of ethoxy-modified trisiloxane, wherein the mass ratio of sodium lauryl sulfate to polyoxyethylene ether in the sodium lauryl sulfate polyoxyethylene ether is 3:1.

[0036] Example 3: A synergist for a lethal herbicide, comprising, by weight: 52 parts of ammonium sulfate, 32 parts of anhydrous sodium sulfate, 9 parts of sodium tripolyphosphate, 4 parts of potassium fulvate, 1.5 parts of sodium lauryl sulfate polyoxyethylene ether, and 0.8 parts of ethoxy-modified trisiloxane, wherein the mass ratio of sodium lauryl sulfate to polyoxyethylene ether in the sodium lauryl sulfate polyoxyethylene ether is 2:1.

[0037] Example 4: A process for preparing the synergist comprises: blending a wetting agent with ethoxy-modified trisiloxane to obtain a mixed solution.

[0038] The mixed liquid is mixed with sodium tripolyphosphate to obtain a first mixture, and the first mixture is mixed with the remaining solid raw materials, and then cooled at room temperature and sieved to obtain a synergist for the herbicide.

[0039] Blank example: Herbicide: 95% glyphosate ammonium salt technical.

[0040] Experiment 1: Efficacy test

[0041] Target of control: annual weeds, barnyard grass.

[0042] Herbicide: 95% glyphosate ammonium salt technical, purchased from Meishan Jinguangdi Crop Protection Technology Co., Ltd., main active ingredient: glyphosate.

[0043] Application method: Spray on stems and leaves, dosage 50g / mu (lower than the dosage specified in the product instructions).

[0044] Control effect (%) = (1-PT / CK)*100%, PT represents the number of remaining grasses (or fresh weight) in the treated area, and CK represents the number of living grasses (or fresh weight) in the blank control area.

[0045] The synergist prepared according to the raw material ratios of Examples 1-3 and the preparation process of Example 4 was mixed with the herbicide at a mass ratio of 1:3 and tested. The test results are shown in Table 1.

[0046] Table 1

[0047] Example 1 Example 2 Example 3 Blank example 15 days after application 90.32 91.47 92.15 66.37 30 days after application 95.74 96.08 97.41 74.59

[0048] From the comparison of Examples 1-3 and the blank example, it can be seen that when the herbicide usage is lower than the recommended usage, the use of the synergist provided by the present invention can greatly improve the effect of the herbicide, thereby reducing the herbicide usage.

[0049] Example 5: A process for preparing the synergist comprises: blending a wetting agent with ethoxy-modified trisiloxane to obtain a mixed solution.

[0050] The mixed liquid is mixed with sodium tripolyphosphate to obtain a first mixture, and sodium sulfate, anhydrous sodium sulfate and potassium fulvate are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, cooled at room temperature and sieved to obtain a synergist for a lethal herbicide.

[0051] Example 6: A process for preparing the synergist comprises: blending a wetting agent with ethoxy-modified trisiloxane to obtain a mixed solution.

[0052] The mixed liquid is mixed with sodium tripolyphosphate to obtain a first mixture, and sodium sulfate, anhydrous sodium sulfate and potassium fulvic acid are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, and then cooled and sieved to obtain a synergist for a lethal herbicide.

[0053] The cooling process includes: spreading the mixed raw materials flat at an ambient temperature of 40°C, letting them stand for 20 minutes, and then cooling them to room temperature. The thickness of the raw materials spread flat is 1 cm, and the ambient temperature during cooling is 10°C.

[0054] Example 7: A process for preparing the synergist comprises: blending a wetting agent with ethoxy-modified trisiloxane to obtain a mixed solution.

[0055] The mixed liquid is mixed with sodium tripolyphosphate to obtain a first mixture, and sodium sulfate, anhydrous sodium sulfate and potassium fulvic acid are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, and then cooled and sieved to obtain a synergist for a lethal herbicide.

[0056] The cooling process includes: spreading the mixed raw materials flat at an ambient temperature of 50°C, letting them stand for 45 minutes, and then cooling them to room temperature. The thickness of the raw materials spread flat is 5 cm, and the ambient temperature during cooling is 20°C.

[0057] Example 8: A process for preparing the synergist comprises: blending a wetting agent with ethoxy-modified trisiloxane to obtain a mixed solution.

[0058] The mixed liquid is mixed with sodium tripolyphosphate to obtain a first mixture, and sodium sulfate, anhydrous sodium sulfate and potassium fulvic acid are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, and then cooled and sieved to obtain a synergist for a lethal herbicide.

[0059] The cooling process includes: spreading the mixed raw materials flat at an ambient temperature of 45°C, letting them stand for 30 minutes, and then cooling them to room temperature. The thickness of the raw materials spread flat is 3 cm, and the ambient temperature during cooling is 15°C.

[0060] Comparative Example 1: The difference from Example 8 is that it does not contain anhydrous sodium sulfate.

[0061] Comparative Example 2: The difference from Example 8 is that it does not contain sodium tripolyphosphate.

[0062] Comparative Example 3: The difference from Example 8 is that it does not contain sodium lauryl sulfate polyoxyethylene ether.

[0063] Test 2: The synergist prepared according to the raw material ratio of Example 3 and the preparation process of Examples 4-8 was mixed with the herbicide at a mass ratio of 1:3 and tested. The test results are shown in Table 2.

[0064] Table 2

[0065] Example 4 Example 5 Example 6 Example 7 15 days after application 93.15 94.28 95.49 94.95 30 days after application 96.41 97.04 97.58 98.66 Example 8 Comparative Example 1 Comparative Example 2 Comparative Example 3 15 days after application 96.96 85.04 84.21 76.15 30 days after application 98.95 85.42 83.47 76.27

[0066] From the comparison of the test results of Example 4 and Example 5, it can be seen that the premixing operation of sodium sulfate, anhydrous sodium sulfate and potassium fulvate can improve the effect of the synergist.

[0067] Comparison of the test results of Example 5 with those of Examples 6-8 shows that the cooling operation provided by the present invention can improve the effect of the synergist to a certain extent. The applicant speculates that the reason may be that moisture causes adhesion between solid powders, affecting the application of pesticides and the absorption of synergists by plants.

[0068] From the comparison of the test results of Comparative Examples 1-3 and Example 8, it can be seen that anhydrous sodium sulfate, sodium tripolyphosphate and sodium lauryl sulfate polyoxyethylene ether in the raw materials all play a decisive role in the effect of the synergist.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A synergist for a lethal herbicide, characterized in that: Calculated in parts by weight, the composition comprises: 50-55 parts of ammonium sulfate, 27-37.5 parts of anhydrous sodium sulfate, 8-10 parts of a dispersant, 3-5 parts of potassium fulvic acid, 1-2 parts of a wetting agent, and 0.5-1 part of ethoxy-modified trisiloxane.

2. The synergist according to claim 1, characterized in that The dispersant includes sodium tripolyphosphate.

3. The synergist according to claim 1, characterized in that The wetting agent includes: sodium lauryl sulfate polyoxyethylene ether.

4. The synergist according to claim 3, characterized in that In the sodium lauryl sulfate polyoxyethylene ether, the mass ratio of sodium lauryl sulfate to polyoxyethylene ether is (1-3):

1.

5. A process for preparing the synergist according to any one of claims 1 to 4, characterized in that: include: The raw materials of the synergist are mixed, cooled and sieved to obtain the synergist for the herbicide.

6. The preparation process according to claim 5, characterized in that: include: The wetting agent and the ethoxy-modified trisiloxane are blended to obtain a mixed solution. The mixed liquid is mixed with part of the solid raw material to obtain a first mixture, and the first mixture is mixed with the remaining solid raw material, and then cooled and sieved to obtain a synergist for the herbicide.

7. The preparation process according to claim 6, characterized in that: The part of solid raw materials includes: sodium tripolyphosphate.

8. The preparation process according to claim 7, characterized in that: Sodium sulfate, anhydrous sodium sulfate and potassium fulvate are premixed to obtain a second mixture; the first mixture and the second mixture are mixed, and then cooled and sieved to obtain a synergist for a lethal herbicide.

9. The preparation process according to claim 6, characterized in that: The cooling operation includes: spreading the mixed raw materials at an ambient temperature of 40° C. to 50° C., letting them stand for 20 minutes to 45 minutes, and then cooling the raw materials to room temperature.

10. The preparation process according to claim 9, characterized in that: The thickness of the raw materials laid flat is 1cm-5cm, and the ambient temperature during cooling is 10℃-20℃.