CN110999903A - Flying anti-spray solid auxiliary agent and preparation method thereof - Google Patents

Abstract

The invention discloses a flying spray-preventing solid additive and a preparation method thereof, belonging to the field of pesticide additives. The solid auxiliary agent comprises the following components in percentage by mass: 50-83% of compound wetting agent, 10-20% of anti-drift agent, 5-15% of dispersing agent, 1-10% of defoaming agent and 1-5% of light stabilizer. After various pesticides are mixed with water according to a required proportion, the flying spray prevention solid additive is added to prepare the flying spray prevention liquid, and the flying spray prevention liquid is suitable for flying spray prevention operation of unmanned aerial vehicle plant protection. The invention can obviously improve the evaporation inhibition rate of pesticide liquid and has good wettability, dispersibility and defoaming property; in actual spraying application, the deposition coverage rate of the fog drops can be greatly increased, and the drift resistance is enhanced; by optimizing the types and the proportions of the raw materials of the auxiliary agent, the problems of precipitation, layering and the like can not occur in the practical application; the pesticide preparation formulation is not limited in use, and the universality is extremely strong; simple preparation process, easy storage and high stability.

Description

Flying anti-spray solid auxiliary agent and preparation method thereof

Technical Field

The invention relates to a flying anti-spraying solid auxiliary agent suitable for pesticides and a preparation method thereof, belonging to the technical field of pesticide auxiliary agents.

Background

The unmanned aerial vehicle plant protection flying prevention technology is popularized and applied to various crops in China due to the advantages of labor saving, time saving, water saving and the like. However, in the process of flight control operation, drift and evaporation of pesticide droplets can cause problems of weakened pesticide effect, environmental pollution, crop importance and the like.

The flying prevention auxiliary agent is a special spraying auxiliary agent which appears along with the development of unmanned aerial vehicle plant protection. Some studies show that the 70% effectiveness of the pesticide depends on the spraying effect, and the flying prevention auxiliary agent is an important means for controlling the physicochemical property of the pesticide spray and improving the pesticide performance, and can reduce or eliminate a plurality of problems related to the spraying application such as pesticide stability, solubility, compatibility, drift, evaporation, volatilization and the like.

The types of flight control aids currently in common mainly include silicone, emulsifiers, vegetable oils, mineral oils and other aids. In order to improve the performances of the pesticide spray mist drop stability, wettability and the like, different flight control assistant raw materials are mixed to prepare a product with better effect, for example, CN106665569A a flight control assistant and a preparation method thereof develop an efficient flight control assistant containing an anti-drift agent, a wetting agent, a penetrating agent, a viscosity regulator, a deposition agent and an antifreezing agent; CN109526953A provides a low-temperature-resistant and hard-water-resistant flight control aid added with a surfactant and betaine; CN108935459A modified vegetable oil flying prevention aid, and a preparation method and application thereof research a flying prevention aid mixed with modified rosin oil, a surfactant, a wetting agent and an anti-drift agent.

On one hand, the pesticide liquid medicine added with the flight control adjuvant is influenced by the environmental temperature, humidity, wind speed and the like in the actual spraying process, so that the obvious fogdrop drifting phenomenon is easy to occur, and meanwhile, the fogdrop evaporation inhibition effect is not obvious; on the other hand, organic silicon and oil substances are mostly added into the special ultra-low-amount spraying auxiliary agents sold in the market for flight control, and liquid medicine added with the auxiliary agents is easy to dissolve in a wax layer on the surface of a leaf to form oil spots in spraying, so that plants are damaged in growth, and key spots appear on leaf surfaces.

In addition, the auxiliaries are liquid auxiliaries, are not easy to store under extreme environmental conditions, and need to be additionally weighed in the application process. The solid flying prevention auxiliary agent can adapt to various storage conditions, can be packaged into a small quantitative package according to the recommended use amount, and does not need to be weighed again in the actual application process. The flying anti-spraying solid auxiliary agent sold in the current market is less, and the problems that the solid auxiliary agent is easy to precipitate and is not easy to mix uniformly in the using process are difficult to solve.

In order to solve the problems of easy evaporation, poor wettability and relatively low deposition rate of pesticide droplets in the unmanned aerial vehicle plant protection process more effectively, the development of the flying spray-preventing solid auxiliary agent which can obviously improve the pesticide utilization rate and the photostability, reduce the spray drift property, moisten, prevent evaporation and has excellent defoaming effect and is easy to dissolve and uniformly mix in the use process is very necessary.

Disclosure of Invention

The invention aims to provide a flying spray-preventing solid auxiliary agent suitable for unmanned aerial vehicle plant protection and a preparation method thereof, the auxiliary agent can obviously reduce the drift phenomenon generated in the liquid medicine spraying process of the unmanned aerial vehicle, simultaneously reduce the evaporation rate of the liquid medicine, reduce the foam amount of the liquid medicine, enable the liquid medicine to have excellent wetting effect on blades, improve the utilization rate and light stability of pesticide, reduce the usage amount of the pesticide to a great extent, and is environment-friendly. The solid auxiliary agent dosage form is beneficial to packaging and storage in the production process, and the invention solves the problems of easy precipitation and difficult uniform mixing in the use process of the solid auxiliary agent through the composition classification and the optimization of the proportion.

The purpose of the invention is realized by the following technical scheme:

the invention provides a flying spray-preventing solid auxiliary agent which comprises the following components in percentage by mass: 50-83% of compound wetting agent, 10-20% of anti-drift agent, 5-15% of dispersing agent, 1-10% of defoaming agent and 1-5% of light stabilizer;

the compound wetting agent is a composition of an anionic solid wetting agent and a nonionic solid wetting agent.

Preferably, the anionic solid wetting agent is a composition of one or more of sodium fatty alcohol polyoxyethylene ether carboxylate, secondary alkyl sodium sulfonate, α -alkenyl sodium sulfonate, sodium hexadecylbenzene sulfonate, sodium hexadecyl sulfate and potassium oleate, the nonionic solid wetting agent is a composition of one or more of sucrose fatty acid ester and fatty acid polyoxyethylene ester, and the mass ratio of the anionic solid wetting agent to the nonionic solid wetting agent is 30-48: 20-35.

More preferably, the anionic solid wetting agent is a composition of one or more of sodium fatty alcohol polyoxyethylene ether carboxylate, α -sodium alkenyl sulfonate, sodium hexadecyl sulfate and potassium oleate, and the nonionic solid wetting agent is a composition of one or more of sucrose fatty acid ester and fatty acid polyoxyethylene ester.

Preferably, the anti-drift agent is one or more of guar gum, guar gum derivatives, xanthan gum, polyacrylamide and hydroxyl acrylic acid polymer.

More preferably, the anti-drift agent is one or more of guar gum, xanthan gum and polyacrylamide.

Preferably, the dispersant is one or more of sodium polyacrylate, polypropylene glycol, hydrocarbon paraffin wax solid and stearic acid monoglyceride.

More preferably, the dispersant is one or more of sodium polyacrylate and polypropylene glycol.

Preferably, the defoaming agent is a composition of one or more of polyether modified silicon solid, water-based organic silicon solid, polyether solid and modified polydimethylsiloxane solid.

More preferably, the defoaming agent is one or a combination of water-based silicone solid and modified polydimethylsiloxane solid.

Preferably, the light stabilizer is one or a combination of more of an ultraviolet absorber, a hindered amine light stabilizer and 2,2,6, 6-tetramethyl-4-piperidyl stearate.

More preferably, the light stabilizer is one or more of ultraviolet light absorber and hindered amine light stabilizer.

The invention also provides a preparation method of the flying spray-preventing solid auxiliary agent, which comprises the following steps: and mechanically mixing the components according to the mass percentage requirement to obtain the flying spray preventing solid additive.

Preferably, the stirring speed of the mechanical mixing is 100-300r/min, and the stirring time is 5-20 min.

The invention also provides a flying spray preventing liquid which comprises the solid auxiliary agent.

The invention also provides a preparation method of the flying spray preventing liquid, which comprises the following steps:

after various oil-based formulation or dry formulation or water-based formulation pesticides are mixed with water according to a required proportion to form an aqueous solution, the flying spray-preventing solid additive is added, and the mixture is oscillated and uniformly mixed to obtain the flying spray-preventing liquid;

the oil-based dosage form comprises missible oil and an ultra-low-volume spray oil agent; the dry preparation formulation comprises wettable powder; the water-based dosage forms comprise aqueous emulsion, microemulsion, suspending agent and aqueous solution;

the mixing mass ratio of the flying spray-preventing solid auxiliary agent to the water phase is 1.5-2.5: 100.

compared with the prior art, the invention has the following beneficial effects:

(1) the flying spray-preventing solid assistant can be mixed with various pesticide solutions with different formulations for use, such as wettable powder, microemulsion, suspending agent, aqueous solution, missible oil and ultra-low-volume spray oil. Mix and use easy operation, the spray liquid that obtains can be used for fluid pressure type or centrifugal nozzle's flying to prevent unmanned aerial vehicle.

(2) After the flying spray-preventing solid additive is mixed with pesticide liquid medicine, the wettability, the evaporation inhibition rate, the leaf surface coverage rate, the defoaming effect and the photostability of spray liquid drops can be obviously improved, and the spray drop drift in the spraying process is obviously reduced.

(3) The flying anti-spray solid auxiliary agent disclosed by the invention is safe in components, does not contain oil substances and aromatic organic solvents, and is high in safety degree to people, livestock and environment; the auxiliary agent has the advantages of easy wetting, evaporation resistance, drift resistance and the like by combining indoor and field implementation examples.

(4) The flying anti-spray solid additive disclosed by the invention is simple in preparation process, all solid raw materials are adopted for mixing, the requirement on storage conditions is low, the field operation is easy, the flying anti-spray solid additive can be packaged in small amount according to the optimal addition amount, and the problems of precipitation, delamination and the like do not occur in the using process.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a graph showing a comparison of the deposition distribution of a liquid medicine sprayed on a droplet detection card after no adjuvant is added and after an adjuvant is added to a commercially available wettable powder of pesticide in example 1, wherein fig. 1(a) is a deposition distribution graph of a pesticide solution without an anti-flying spray adjuvant added on the droplet detection card, and fig. 1(b) is a deposition distribution graph of a pesticide solution with the anti-flying spray solid adjuvant added according to the present invention on the droplet detection card;

FIG. 2 is a graph showing the measurement of the contact angle of a pesticide suspension solution in example 3 using a droplet shape analyzer DSA100, in which FIG. 2(a) is a graph showing the measurement of the contact angle of a pesticide solution without the addition of a repellent aid, and FIG. 2(b) is a graph showing the measurement of the contact angle of a pesticide solution with the addition of a special aid according to the present invention;

FIG. 3 shows a fly spray prevention solid additive prepared by an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

The following embodiment provides a flying spray prevention solid auxiliary agent, which comprises the following components in percentage by mass: 50-83% of compound wetting agent, 10-20% of anti-drift agent, 5-15% of dispersing agent, 1-10% of defoaming agent and 1-5% of light stabilizer;

the compound wetting agent is a composition of an anionic solid wetting agent and a nonionic solid wetting agent.

The anionic solid wetting agent is a composition of one or more of sodium fatty alcohol polyoxyethylene ether carboxylate, secondary alkyl sodium sulfonate, α -alkenyl sodium sulfonate, sodium hexadecylbenzene sulfonate, sodium hexadecyl sulfate and potassium oleate, the nonionic solid wetting agent is a composition of one or more of sucrose fatty acid ester and fatty acid polyoxyethylene ester, and the mass ratio of the anionic solid wetting agent to the nonionic solid wetting agent is 30-48: 20-35.

The anti-drift agent is one or a composition of guar gum, guar gum derivatives, xanthan gum, polyacrylamide and hydroxyl acrylic acid polymer.

The dispersing agent is one or a combination of sodium polyacrylate, polypropylene glycol, hydrocarbon paraffin wax solid and stearic acid monoglyceride.

The defoaming agent is one or a composition of polyether modified silicon solid, water-based organic silicon solid, polyether solid and modified polydimethylsiloxane solid.

The light stabilizer is one or a composition of more of an ultraviolet absorbent, a hindered amine light stabilizer and 2,2,6, 6-tetramethyl-4-piperidyl stearate.

The preparation method comprises the following steps: the raw materials are quickly and mechanically mixed according to the mass percentage requirement, so that the wetting agent and the anti-drift agent can be stably dispersed, and the flying anti-spray solid preparation can be obtained.

The prepared flying anti-spray solid additive is directly packaged by using plastic light-proof bags, each bag has the mass of 15-25g or the multiple thereof, and can be directly added into 1L of liquid medicine or the volume of the multiple thereof for use.

When the flying spray-preventing liquid is used, various oil-based formulation, dry formulation or water-based formulation pesticides sold in the market are mixed with water according to a required proportion, the flying spray-preventing solid auxiliary agent disclosed by the invention is added, and the mixture is uniformly oscillated to prepare the flying spray-preventing liquid for unmanned aerial vehicle plant protection.

The commercially available pesticides selected in the embodiment of the invention are respectively as follows: 70% pymetrozine Wettable Powder (WP), 25% buprofezin suspending agent (SC), 4% abamectin acetamiprid Microemulsion (ME) and 20% acetamiprid Wettable Powder (WP); 14% carbofuran indoxacarb Suspension (SC); 32.5% azoxystrobin suspending agent (SC).

The commercially available flight control aids selected for comparison in the embodiment of the invention are respectively as follows: the quick-moistening organic silicon additive (recommended addition amount of 1/3000), the special red swallow flying prevention additive (recommended addition amount of 3-4%), the special aviation chemical treasure flying prevention additive (recommended addition amount of 1-2%) and the special aviation chemical treasure flying prevention additive (recommended addition amount of 1-2%).

Example 1

The embodiment provides a flying spray prevention solid auxiliary agent (shown in fig. 3, formula 1), which comprises the following components in percentage by mass: 35% of sodium fatty alcohol polyoxyethylene ether carboxylate, 12% of potassium oleate, 30% of fatty acid polyoxyethylene ester, 10% of guar gum, 5% of polypropylene alcohol, 5% of modified polydimethylsiloxane solid and 3% of hindered amine light stabilizer.

The flight control assistant is applied to 12 g/L70% pymetrozine Wettable Powder (WP) liquid medicine and is added according to 2.5% of the mass of the liquid spraying amount. The mixture is added without precipitation and delamination and is mixed evenly.

The liquid medicine to which the flying preventive solid auxiliary was not added, the liquid medicine to which the flying preventive solid auxiliary (formulation 1) of this example was added, and the liquid medicine to which an equivalent amount of a commercially available flying preventive auxiliary product was added were measured for the droplet contact angle size using a DSA100 contact angle measuring instrument, the droplet evaporation time of 1 μ L was measured using a slide glass titration method, and the droplet deposition coverage was measured using a water-sensitive paper image analysis method.

The spray solutions were subjected to the parameter measurements listed in table 1, and the performance results obtained are shown in table 1.

TABLE 1

As can be seen from table 1, the spray liquid prepared by adding the flying spray prevention solid auxiliary agent of the formula 1 of the present embodiment is better than the spray liquid prepared by adding no auxiliary agent or a flying spray prevention auxiliary agent product sold in the market, in the spraying operation performed by mixing the flying spray prevention solid auxiliary agent provided in the present embodiment 1 with 12g/L of 70% pymetrozine Wettable Powder (WP) solution, and performing indoor simulated spraying operation by using a high-pressure nozzle and a water pump of the same model. Compared with the liquid medicine without the addition of the auxiliary agent, the contact angle of the liquid medicine added in the formula 1 is reduced by 66.92%, the evaporation time is prolonged by 54.11%, and the droplet deposition coverage rate is improved by 454.71%.

Further observing the experimental results of the spray liquid without the solid assistant and after the solid assistant is added provided in example 1, which simulate spraying indoors, fig. 1 shows the comparison of the mist drop deposition distribution of the spray liquid without the solid assistant and after the solid assistant is added during spraying. As shown in fig. 1(a), the pesticide spray solution without the addition of the adjuvant has a small coverage area, and droplets have large diameters and are distributed unevenly; fig. 1(b) shows the spraying condition of the pesticide spray solution added with the assistant of the invention, the particle size of the spray drops is small, the distribution is uniform and very dense, the deposition coverage rate of the spray drops can be obviously improved, and the flying anti-spraying solid assistant of the invention can not only reduce the particle size of the spray drops, but also enhance the drift resistance.

Example 2

The embodiment provides a fly spray prevention solid additive (formula 2), which comprises the following components in percentage by mass: 40% of sodium hexadecyl sulfate, 25% of polyoxyethylene fatty acid ester, 5% of guar gum, 5% of xanthan gum, 10% of sodium polyacrylate, 10% of water-based organic silicon solid and 5% of ultraviolet absorbent.

The flight control assistant is applied to 25g/L of 25% buprofezin suspending agent (SC) liquid medicine and is added according to 2.0% of the mass of the liquid spraying amount. The mixture is added without precipitation and delamination and is mixed evenly.

The liquid medicine to which the flying preventive solid auxiliary was not added, the liquid medicine to which the flying preventive solid auxiliary (formulation 2) of this example was added, and the liquid medicine to which an equivalent amount of a commercially available flying preventive auxiliary product was added were measured for the droplet contact angle size using a DSA100 contact angle measuring instrument, the droplet evaporation time of 1 μ L was measured using a slide titration method, and the droplet deposition coverage was measured using a water-sensitive paper image analysis method.

The spray solutions were subjected to the parameter measurements listed in table 2, and the performance results obtained are shown in table 1.

TABLE 2

As can be seen from table 2, the spray liquid prepared by adding the flying prevention solid auxiliary agent of the formula 2 of this embodiment is better than the spray liquid prepared by adding no auxiliary agent or a flying prevention auxiliary agent product sold in the market. Compared with the liquid medicine without the addition of the auxiliary agent, the contact angle of the liquid medicine added with the formula 2 is reduced by 59.25%, the evaporation time is prolonged by 64.07%, and the droplet deposition coverage rate is improved by 124.11%, which shows that the flying anti-spraying solid auxiliary agent provided in the embodiment 2 can effectively improve the wettability, the evaporation resistance and the drift resistance of the pesticide liquid droplet.

Example 3

The embodiment provides a fly spray prevention solid auxiliary agent (formula 3), which comprises the following components, by mass, α -sodium alkenyl sulfonate 30%, potassium oleate 15%, sucrose fatty acid ester 25%, guar gum 10%, polyacrylamide 5%, sodium polyacrylate 6%, modified polydimethylsiloxane solid 5%, and hindered amine light stabilizer 4%.

The flying prevention auxiliary agent is applied to 20g/L of 4% abamectin and acetamiprid Microemulsion (ME) liquid medicine and is added according to 2.5% of the mass of the liquid spraying amount. The mixture is added without precipitation and delamination and is mixed evenly.

The liquid medicine without the flying preventive solid assistant, the liquid medicine with the flying preventive solid assistant and the liquid medicine with the same amount of the commercial flying preventive assistant product are respectively measured by a DSA100 contact angle measuring instrument for measuring the contact angle of the fog drops, a glass slide titration method for measuring the evaporation time of the fog drops of 1 microliter and a water-sensitive paper image analysis method for measuring the deposition coverage rate of the fog drops.

The spray solutions were subjected to the parameter measurements listed in table 3, and the performance results obtained are shown in table 3.

TABLE 3

As can be seen from table 3, the flying spray prevention solid auxiliary provided in example 3 was mixed with 20g/L of 4% avermectin-acetamiprid Microemulsion (ME) solution and spray-applied, and indoor simulated spray-application was performed using the same type of high-pressure spray head and water pump, and the spray-applied liquid containing the flying spray prevention solid auxiliary of formula 3 of this example had no auxiliary or was added with a spray of a flying spray prevention auxiliary product sold in the market. Compared with the liquid medicine without the addition of the auxiliary agent, the contact angle of the liquid medicine added with the formula 3 is reduced by 42.67%, the evaporation time is prolonged by 94.33%, and the droplet deposition coverage rate is improved by 200.20%, which shows that the flying anti-spraying solid auxiliary agent provided in the embodiment 3 can effectively improve the wettability, the evaporation resistance and the drift resistance of the pesticide liquid droplet.

Further observing the experimental results of the spray liquid without the solid assistant and after the solid assistant is added provided in example 3, the experimental results of the simulated spraying in the room show the comparison of the contact angles of the spray liquid without the solid assistant and after the solid assistant is added on the blade in fig. 2. As shown in fig. 2(a), the pesticide spray liquid to which the adjuvant of the present invention is not added has a large contact angle value; fig. 2(b) shows the contact angle result of the pesticide spray solution added with the adjuvant of the invention, and it can be seen that the contact angle of pesticide droplets is obviously reduced, after the pesticide spray solution is sprayed on the leaf surfaces, the pesticide droplets can rapidly infiltrate the leaf surfaces and effectively permeate the leaf surfaces, and the pesticide spray solution is greatly helpful for improving pesticide effect.

Example 4

The embodiment provides a fly spray prevention solid auxiliary agent (formula 4), which comprises the following components, by mass, α -sodium alkenyl sulfonate 30%, fatty acid polyoxyethylene ester 20%, guar gum 10%, polyacrylamide 10%, sodium polyacrylate 15%, modified polydimethylsiloxane solid 10%, and hindered amine light stabilizer 5%.

The preparation method is the same as in example 1.

Example 5

The embodiment provides a fly spray prevention solid additive (formula 5), which comprises the following components in percentage by mass: 48% of sodium hexadecyl sulfate, 35% of sucrose fatty acid ester, 10% of guar gum, 5% of sodium polyacrylate, 1% of modified polydimethylsiloxane solid and 1% of hindered amine light stabilizer.

The preparation method is the same as in example 1.

Comparative example 1

The comparative example provides a fly spray prevention solid additive (formula 1') which comprises the following components in percentage by mass: 50% of sodium fatty alcohol polyoxyethylene ether carboxylate, 27% of potassium oleate, 10% of guar gum, 5% of polypropylene alcohol, 5% of modified polydimethylsiloxane solid and 3% of hindered amine light stabilizer. It differs from example 1 only in that: no non-ionic solid wetting agent was used.

Comparative example 2

The comparative example provides a fly spray prevention solid additive (formula 2') which comprises the following components in percentage by mass: 77% of fatty acid polyoxyethylene ester, 10% of guar gum, 5% of polypropylene alcohol, 5% of modified polydimethylsiloxane solid and 3% of hindered amine light stabilizer. It differs from example 1 only in that: no anionic solid wetting agent was used.

Comparative example 3

The comparative example provides a fly spray prevention solid additive (formula 3') which comprises the following components in percentage by mass: 47% of quaternary ammonium salt surfactant, 30% of polyoxyethylene fatty acid ester, 10% of guar gum, 5% of polypropylene alcohol, 5% of modified polydimethylsiloxane solid and 3% of hindered amine light stabilizer. It differs from example 1 only in that: the cationic solid wetting agent is adopted to replace the anionic solid wetting agent.

Comparative example 4

The comparative example provides a fly spray prevention solid additive (formula 4') which comprises the following components in percentage by mass: 35% of sodium fatty alcohol polyoxyethylene ether carboxylate, 12% of potassium oleate, 33% of fatty acid polyoxyethylene ester, 10% of guar gum, 5% of polypropylene alcohol and 5% of modified polydimethylsiloxane solid. It differs from example 1 only in that: no light stabilizers were added.

Examples 4 to 5 and comparative examples 1 to 4 were applied to 12g/L of a 70% pymetrozine Wettable Powder (WP) chemical solution and added in an amount of 2.5% by mass of the liquid spray. The precipitation and delamination phenomena are observed during the mixing process, the size of a droplet contact angle is measured by using a DSA100 contact angle tester, the evaporation time of 1 mu L of droplets is measured by using a glass slide titration method, and the deposition coverage rate of the droplets is measured by using a water-sensitive paper image analysis method.

The spray solutions were subjected to the parameter measurements listed in table 4, and the performance results obtained are shown in table 4.

TABLE 4

And (3) injecting, namely, the liquid medicines added in the formulas 1 ', 2 ' and 3 ' have precipitation and caking phenomena, the nozzle is not prevented from being blocked in the test, and the filtered liquid medicines are used for detecting three performances.

As can be seen from Table 4, the examples 4-5 and the comparative examples 1-4 were applied to 12g/L of 70% pymetrozine Wettable Powder (WP) solution and were sprayed, and the same type of high pressure nozzle and water pump were used to perform indoor simulated spraying. When only the anionic wetting agent or the nonionic wetting agent is added, the phenomena of precipitation and caking can occur in the liquid medicine, the contact angle of the liquid medicine is only slightly reduced, and the evaporation time and the deposition coverage rate are only slightly improved. When the cationic wetting agent is used for replacing the anionic wetting agent, a large amount of caking appears in the liquid medicine, the wettability and the coverage rate are improved to a small extent, and the total evaporation time is reduced compared with that of the blank liquid medicine. When the light stabilizer is not added, the liquid medicine and the auxiliary agent are uniformly mixed, precipitation and agglomeration do not occur, the contact angle is obviously reduced, the deposition coverage rate is obviously improved, but the total evaporation time of the liquid medicine is slightly increased, which shows that the addition of the light stabilizer has a great influence on the evaporation resistance of the liquid medicine.

The flying spray-preventing solid additive has the advantages of evaporation inhibition, bubbling reduction, strong light stability, easiness in mixing, wetting, sedimentation, drifting resistance, safety in use and the like, is easy to wet, and is more convenient to store and transport. The auxiliary agent has higher solubility in aqueous solution, has wide adaptability to the types of pesticide preparations in the using process, and can be mixed with the flying spray-preventing solid auxiliary agent to prepare flying spray-preventing liquid after various oil-based, dry-made or water-based pesticide preparations are mixed with water according to the required proportion.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. The flying spray-preventing solid additive is characterized by comprising the following components in percentage by mass: 50-83% of compound wetting agent, 10-20% of anti-drift agent, 5-15% of dispersing agent, 1-10% of defoaming agent and 1-5% of light stabilizer;

the compound wetting agent is a composition of an anionic solid wetting agent and a nonionic solid wetting agent.

2. The fly spray prevention solid auxiliary agent as claimed in claim 1, wherein the anionic solid wetting agent is one or more of sodium fatty alcohol polyoxyethylene ether carboxylate, secondary alkyl sodium sulfonate, α -alkenyl sodium sulfonate, sodium hexadecylbenzene sulfonate, sodium hexadecyl sulfate and potassium oleate, the nonionic solid wetting agent is one or more of sucrose fatty acid ester and fatty acid polyoxyethylene ester, and the mass ratio of the anionic solid wetting agent to the nonionic solid wetting agent is 30-48: 20-35.

3. The fly spray prevention solid aid of claim 1, wherein the anti-drift agent is a combination of one or more of guar gum, guar derivatives, xanthan gum, polyacrylamide, and hydroxyacrylic acid polymers.

4. The fly spray prevention solid additive of claim 1, wherein the dispersant is a combination of one or more of sodium polyacrylate, polyallyl alcohol, hydrocarbon paraffin wax solid, and glycerol monostearate.

5. The flying spray prevention solid aid according to claim 1, wherein the defoaming agent is a combination of one or more of polyether modified silicon solids, water-based silicone solids, polyether solids, and modified polydimethylsiloxane solids.

6. The fly spray prevention solid aid of claim 1, wherein the light stabilizer is a combination of one or more of a uv absorber, a hindered amine light stabilizer, and 2,2,6, 6-tetramethyl-4-piperidyl stearate.

7. The method for preparing the flying spray prevention solid auxiliary agent according to claim 1, which is characterized by comprising the following steps: and mechanically mixing the components according to the mass percentage requirement to obtain the flying spray preventing solid additive.

8. The method for preparing the fly spray prevention solid auxiliary agent according to claim 7, wherein the stirring speed of the mechanical mixing is 100-300r/min, and the stirring time is 5-20 min.

9. A flying spray prevention fluid comprising the solid additive according to claim 1.

10. A method of preparing the flying spray preventing fluid of claim 9, comprising the steps of:

after various oil-based formulation or dry formulation or water-based formulation pesticides are mixed with water according to a required proportion to form an aqueous solution, the flying spray-preventing solid additive is added, and the mixture is oscillated and uniformly mixed to obtain the flying spray-preventing liquid;

the oil-based dosage form comprises missible oil and an ultra-low-volume spray oil agent; the dry preparation formulation comprises wettable powder; the water-based dosage forms comprise aqueous emulsion, microemulsion, suspending agent and aqueous solution;

the mixing mass ratio of the flying spray-preventing solid auxiliary agent to the water phase is 1.5-2.5: 100.

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