CN109805006B - Aviation low-amount spray weeding suspending agent and preparation and use methods thereof - Google Patents
Aviation low-amount spray weeding suspending agent and preparation and use methods thereof Download PDFInfo
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Abstract
The invention discloses an aviation low-volume spray weeding suspending agent and preparation and use methods thereof, and belongs to the technical field of pesticides. The suspending agent consists of the following components in parts by weight: 0.01-10 parts of pesticide raw material; 1-15 parts of evaporation drift inhibitor; 1-10 parts of a dispersant; 1-10 parts of a wetting agent; 0.01-2 parts of a defoaming agent; 0.1-2 parts of a binder; 1-5 parts of a grinding aid; 40-95 parts of water; the evaporation drift inhibitor comprises polysaccharide and oil; the dispersing agent comprises a nonionic surfactant and an anionic surfactant; the nonionic surfactant comprises hydroxyl-terminated hyperbranched polyester; the grinding aid is one or more of triethanolamine, diethanol monoisopropanolamine and polyisopropanolamine. The aviation low-volume spray weeding suspending agent disclosed by the invention is simple in preparation and use methods, and has the advantages of no volatile organic solvent, smaller particle size than that of a conventional suspending agent, low surface tension and the like under the combined action of multiple auxiliaries.
Description
Technical Field
The invention relates to the field of pesticides, in particular to an aviation low-volume spray weeding suspending agent and a preparation method and a use method thereof.
Background
Agricultural aviation plant protection is to spray pesticide or fertilizer by airplane to prevent and control diseases, insects and weeds in farmland, forest and grassland or to manage field growth. In the aviation plant protection spraying process, as the liquid spraying amount per mu is 0.5-1.5L, the dilution concentration of the pesticide is about 15 times higher than that of ground manual or mechanical spraying, the requirements on the pesticide dosage and the pesticide quality are correspondingly improved, and special pesticide is required. At present, the shortage of agricultural aviation spraying special-purpose medicament in China becomes an important factor for restricting the development of agricultural aviation plant protection industry in China. Pesticide emulsifiable solution, a suspending agent, wettable powder and the like for ground spraying are still used in the conventional aviation plant protection operation, wherein the emulsifiable solution contains volatile organic compounds, and the pollution to the atmosphere in the aviation spraying process is more serious than that of the conventional spraying; the wettable powder has larger grain diameter, low suspension rate, uneven spraying, higher surface tension and poor wettability, and is difficult to wet and spread on crops in aviation spraying.
Disclosure of Invention
In order to solve the problems that a special aviation medicament is lacked in the current market and the conventional pesticide is not suitable for aviation spraying, the invention provides a pesticide suspending agent used in agricultural aviation low-volume spraying and a preparation method thereof; the suspending agent does not contain Volatile Organic Compounds (VOC), and reduces the pollution of volatile matters to the atmosphere in the pesticide spraying process; the particle size is smaller than that of the conventional pesticide suspending agent, and the spreading uniformity and the absorption rate of the pesticide on the surface of a target are improved.
In order to solve the technical problems, the invention provides the following technical scheme:
on one hand, the invention provides an aviation low-volume spray weeding suspending agent which is composed of the following components in parts by weight:
the evaporation drift inhibitor is a mixture of polysaccharide and oil;
the dispersing agent is a mixture of a nonionic surfactant and an anionic surfactant;
the nonionic surfactant comprises hydroxyl-terminated hyperbranched polyester;
the grinding aid is one or more of triethanolamine, diethanol monoisopropanolamine and polyisopropanolamine.
Preferably, the aviation low-volume spray weeding suspending agent consists of the following components in parts by weight:
furthermore, the pesticide raw material is solid, the melting point is above 60 ℃, the solubility in water is less than 200mg/L, and the pesticide raw material is stable and does not decompose.
Further, the raw pesticide comprises one or more of cyhalofop-butyl, penoxsulam, atrazine, mesotrione, nicosulfuron, flufenacet, thidiazuron, diuron, topramezone, quinclorac, bensulfuron-methyl, quizalofop-p-ethyl, carfentrazone-ethyl, florasulam and fluoroglycofen-ethyl.
Further, the polysaccharide is one or more of cellulose, starch, glycogen and polyfructose;
the oil is one or more of vegetable oil, methylated vegetable oil and ethylated vegetable oil.
Further, the nonionic surfactant also comprises one or more of stearyl alcohol polyoxyethylene ether, propylene glycol block polyether, allyl alcohol polyether, oleic acid polyoxyethylene ester and lauric acid polyoxyethylene ester;
the anionic surfactant is one or more of sodium polycarboxylate, sodium lignosulphonate, fatty alcohol-polyoxyethylene ether sodium sulfate, sodium isooctyl sulfate and n-decyl sodium sulfate.
In the invention, the surfactant is prepared by mixing one of the hydroxyl-terminated hyperbranched polyester nonionic surfactant and the rest nonionic surfactant with the anionic surfactant, so that the prepared pesticide composition has a good wetting effect.
Preferably, the wetting agent is one or more of isomeric tridecanol ether, ditridecanol sodium sulfosuccinate, sodium dibutylnaphthalene sulfonate, alkyl naphthalene sulfonate condensate and trisiloxane.
Preferably, the defoaming agent is an organic silicon defoaming agent and/or a polyether defoaming agent;
the binder is one or more of acacia, acrylate, acrylic acid modified alkyd resin and vinyl acetate/acrylate copolymer. It is to be noted that the antifoaming agent commonly used by those skilled in the art can be used in the present invention.
In another aspect, the invention also provides a preparation method of the aerial low-volume spray weeding suspending agent, which comprises the following steps:
step 1: mixing water, an evaporation drift inhibitor, a dispersing agent, a wetting agent, a pesticide raw material, a defoaming agent and a grinding aid, keeping the stirring speed at 60 revolutions per minute, and stirring for 30 minutes;
step 2: sanding the mixture in a horizontal nano sand mill until the particle size is 0.01-1 micron;
and step 3: and adding the sanded material into a binder, and adjusting the viscosity to form a product.
In still another aspect, the invention also provides a method for using the aerial low-volume spray weeding suspending agent, wherein the pesticide is not diluted or the diluted concentration is lower than 100 times during spraying. The suspending agent is used for aviation plant protection of unmanned planes, fixed-wing airplanes and the like.
The suspension storage device can be a PET, PEPA, HDPE, F-HDPE, PE bottle, and can also be a medicine tank which can be quickly replaced and reused.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the suspending agent formed by combining the specific dispersant, the evaporation drift inhibitor, the wetting agent, the defoaming agent, the binder and the grinding aid in a specific ratio does not contain a volatile organic solvent, has smaller particle size than a conventional suspending agent and low surface tension, and is easy to wet, adhere and deposit on the surface of crops, so that the number of fog drops reaching a target is increased, and the pesticide effect is improved. The diluted concentration of the pesticide is about 15 times higher than that of the conventional pesticide in the low-volume spraying process of aviation plant protection, and the product can keep the liquid medicine stable and uniformly spread on the surface of the plant body under the condition.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
In the present invention, the materials and reagents used are not specifically described, and are commercially available.
The invention provides an aviation low-volume spray weeding suspending agent and a preparation method thereof, and the specific embodiment is as follows.
Example 1
An aviation low-volume spray weeding suspending agent comprises the following components in parts by weight: 3.6 parts of thidiazuron, 1.8 parts of diuron, 1 part of cellulose, 1 part of methylated vegetable oil, 1 part of hydroxyl-terminated hyperbranched polyester, 1 part of polyoxyethylene oleate, 1 part of sodium polycarboxylate, 10 parts of tridecanol ether, 0.01 part of an organic silicon defoamer, 0.1 part of Arabic gum, 1 part of triethanolamine and 95 parts of water.
The preparation method of the aviation low-volume spray weeding suspending agent comprises the following steps:
step 1: mixing water, evaporation drift inhibitor, dispersant, wetting agent, raw pesticide, defoamer and grinding aid, keeping the stirring speed at 60 r/min, and stirring for 30 min;
step 2: sanding the mixture in a horizontal nano sand mill until the particle size is 0.01-1 micron;
and step 3: and adding the sanded material into a binder, and adjusting the viscosity to form a product.
Example 2
An aviation low-volume spray weeding suspending agent comprises the following components in parts by weight: 1 part of penoxsulam, 3 parts of glycogen, 2 parts of ethylated vegetable oil, 2 parts of hydroxyl-terminated hyperbranched polyester, 2 parts of octadecanol polyoxyethylene ether, 1 part of sodium lignosulfonate, 1 part of trisiloxane, 0.3 part of polyether defoamer, 1 part of acrylate, 3 parts of diethanol monoisopropanolamine and 77 parts of water.
The preparation method is the same as example 1.
Example 3
An aviation low-volume spray weeding suspending agent comprises the following components in parts by weight: 10 parts of cyhalofop-butyl, 5 parts of glycogen, 5 parts of polyfructose, 5 parts of vegetable oil, 5 parts of hydroxyl-terminated hyperbranched polyester, 2 parts of polyoxyethylene laurate, 3 parts of polyoxyethylene stearyl alcohol, 4 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 1 part of isooctyl sodium sulfate, 10 parts of sodium dibutylnaphthalene sulfonate, 1 part of a polyether defoamer, 2 parts of acrylic acid modified alkyd resin, 5 parts of diethanol monoisopropanolamine and 85 parts of water.
The preparation method is the same as example 1.
Example 4
An aviation low-volume spray weeding suspending agent comprises the following components in parts by weight: 5 parts of topramezone, 5 parts of polyfructose, 5 parts of vegetable oil, 3 parts of hydroxyl-terminated hyperbranched polyester, 4 parts of octadecanol polyoxyethylene ether, 3 parts of isooctyl sodium sulfate, 8 parts of ditridecyl sulfosuccinate sodium, 0.5 part of a polyether defoamer, 1.5 parts of Arabic gum, 3 parts of polyisopropanolamine and 50 parts of water.
The preparation method is the same as example 1.
To further illustrate the beneficial effects of the present invention, a comparative example was constructed as follows, using example 3 as an example only, for reasons of space.
Comparative example 1
This comparative example was carried out in the same manner as example 3 except that the hydroxyl-terminated hyperbranched polyester was replaced with an equivalent amount of polyoxyethylene oleate.
Comparative example 2
In the comparative example, the hydroxyl-terminated hyperbranched polyester, the stearyl alcohol polyoxyethylene ether and the isooctyl sodium sulfate are replaced by the same amount of phenethyl phenol polyoxyethylene ether, and the rest is the same as that in the example 3.
Comparative example 3
This comparative example was the same as example 3 except that the diethanolisopropanolamine was replaced with an equivalent amount of ethylene glycol.
Comparative example 4
Glycogen, polyfructose and vegetable oil were omitted, and the rest was the same as in example 3.
The basic properties of the suspensions prepared in examples 1-4 above are shown in Table 1; the basic properties of the above comparative examples 1 to 4 are shown in Table 2.
TABLE 1
As can be seen from the above table, the suspending agent prepared by the invention has better water dispersibility, better stability in hot storage and cold storage, lower surface tension and short penetration time.
TABLE 2
As can be seen from the above table, the suspending agent in the comparative example of the present invention has poor suspending effect, large surface tension and long time required for permeation.
In order to verify that the pesticide composition has a synergistic effect on the field sprayed by the pesticide unmanned aerial vehicle, the pesticide effect test in the field for preventing and controlling the moleplant seed is carried out by adopting the cyhalofop-butyl missible oil with the concentration of 10 percent and the comparative examples 1-4, and the reagent is firstly diluted by 10 times with water. Adopt big jiangjiang MG-1 plant protection unmanned aerial vehicle as spraying apparatus, the misce bene is executed the medicine application, sprays speed: 0.30L/min, operation flying speed: 5m/s, the flying height is 2 meters above the top of the ground paddy field, pesticide application is carried out under the breeze condition that the wind speed is 3.6-5.2 m/s, the field pesticide effect test is carried out according to the field pesticide effect test criterion, and the control effect is shown in table 3.
TABLE 3
As can be seen from the table above, the control effect of the suspending agent prepared by the invention is higher than that of the suspending agents prepared in comparative examples 1-4 in 3 days, 7 days and 14 days after application, and compared with 10% cyhalofop-butyl emulsifiable concentrate, the aviation low-volume spray weeding suspending agent prepared by the invention has better control effect on plant diseases and insect pests.
In conclusion, the aviation low-volume spray weeding suspending agent disclosed by the invention is simple in preparation and use methods, and under the combined action of various auxiliaries, the suspending agent has the advantages of no volatile organic solvent, smaller particle size than a conventional suspending agent, low surface tension and the like, and is easy to wet, adhere and deposit on the surface of crops, so that the number of fog drops reaching a target is increased, and the pesticide effect is improved.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and are intended to be within the scope of the invention.
Claims (3)
1. The aviation low-volume spray weeding suspending agent is characterized by comprising the following components in parts by weight: 10 parts of cyhalofop-butyl, 5 parts of glycogen, 5 parts of polyfructose, 5 parts of vegetable oil, 5 parts of hydroxyl-terminated hyperbranched polyester, 2 parts of polyoxyethylene laurate, 3 parts of polyoxyethylene stearyl alcohol, 4 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 1 part of isooctyl sodium sulfate, 10 parts of sodium dibutylnaphthalene sulfonate, 1 part of a polyether defoamer, 2 parts of acrylic acid modified alkyd resin, 5 parts of diethanol monoisopropanolamine and 85 parts of water.
2. A process for preparing an aerial low-volume spray herbicidal suspension as claimed in claim 1 comprising:
step 1: mixing water, glycogen, polyfructose, vegetable oil, hydroxyl-terminated hyperbranched polyester, polyoxyethylene laurate, polyoxyethylene octadecanol, fatty alcohol-polyoxyethylene ether sodium sulfate, isooctyl sodium sulfate, sodium dibutylnaphthalenesulfonate, cyhalofop-butyl, a polyether defoamer and diethanol monoisopropanolamine, keeping the stirring speed at 60 revolutions per minute, and stirring for 30 minutes;
step 2: sanding the mixture in a horizontal nano sand mill until the particle size is 0.01-1 micron;
and step 3: and adding the sanded material into acrylic acid modified alkyd resin, and adjusting the viscosity to form a product.
3. The method of using an aerial low-volume spray herbicidal suspension formulation as claimed in claim 1 wherein the pesticide is sprayed undiluted or at a diluted concentration of less than 100 times.
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| CN109805006B true CN109805006B (en) | 2021-11-19 |
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2019
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| WO2011000880A2 (en) * | 2009-07-01 | 2011-01-06 | Lamberti Spa | Aqueous herbicide concentrate |
| CN102936856A (en) * | 2012-11-22 | 2013-02-20 | 吴江江旭纺织有限公司 | Method for preparing paint of textile |
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