CN112219857A - Cyhalothrin aqueous emulsion and low-energy emulsification preparation method thereof - Google Patents
Cyhalothrin aqueous emulsion and low-energy emulsification preparation method thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
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Abstract
The invention discloses a cyhalothrin aqueous emulsion and a low-energy emulsification preparation method thereof, and the technical scheme is as follows: the cyhalothrin aqueous emulsion comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 15% -20%, the auxiliary materials (by mass percentage) comprise vegetable oil: 5% -10%, polyether phosphate: 10-20%, 10-30% of nonylphenol polyoxyethylene ether, 5-8% of phosphate, 10-15% of phenethyl phenol polyoxyethylene, and the cyhalothrin aqueous emulsion and the low-energy emulsification preparation method thereof have the beneficial effects that: after the plant oil is mixed with the pesticide according to the proportion of 10%, the plant oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can be uniformly covered on the surface of the plant, the pesticide is ensured to have longer residual period, and the plant oil has the advantages of no use of aromatic organic solvents, quick degradation, reduction of environmental pollution and improvement of pesticide effect.
Description
Technical Field
The invention relates to the technical field of cyhalothrin aqueous emulsion, and particularly relates to cyhalothrin aqueous emulsion and a low-energy emulsification preparation method thereof.
Background
Cyhalothrin, i.e., lambda-cyhalothrin, commonly known as lambda-cyhalothrin, is a mixture of equal amounts of (S) - α -cyano-3-phenoxybenzyl (Z) - (1R, 3R) -3- (2-chloro-3, 3, 3-trifluoroprop-1-ene) -2, 2-dimethylcyclopropanecarboxylate and (R) - α -cyano-3-phenoxybenzyl (Z) - (1S, 3S) -3- (2-chloro-3, 3, 3-trifluoroprop-1-ene) -2, 2-dimethylcyclopropanecarboxylate; or equivalent (S) -alpha-cyano-3-phenoxybenzyl (Z) - (1R) -cis-3- (2-chloro-3, 3, 3-trifluoropropenyl) -2, 2-dimethylcyclopropanecarboxylate and (R) -alpha-cyano-3-phenoxybenzyl (Z) - (1S) -cis-3- (2-chloro-3, 3, 3-trifluoropropenyl) -2, 2-dimethylcyclopropanecarboxylate, cyhalothrin is a pyrethroid insecticide developed in the early stage of the 20 th century 80 years, has extremely strong stomach toxicity and contact poisoning effects, is used for preventing and treating lepidoptera pests such as leaf rollers and plutella xylostella, homoptera pests such as aphids and leafhoppers, weevils, phyllodes pests such as phylloxera and the like, and livestock ectoparasites such as Boophilus microplus, Oriental horn fly, and livestock lice.
The prior art has the following defects: at present, cyhalothrin is produced in a plurality of factories, preparations comprise missible oil, aqueous emulsion, wettable powder and the like, green water-based preparations of pesticides such as microemulsion and aqueous emulsion are hot spots of preparation research at home and abroad and inevitable trends of pesticide preparation development at present, but the missible oil preparations and the water-based preparations are mainly prepared by aromatic organic solvents, the aromatic organic solvents such as benzene, toluene, xylene and other fused ring aromatic solvents are difficult to biodegrade, the pollution to the environment is very serious, the harm to a pesticide applicator is limited, the aromatic organic solvents are even prohibited to be used in the pesticide preparations in some countries, particularly, the preparations prepared by applying the aromatic organic solvents to vegetables and fruit trees are strongly resisted, and the pesticide effect is low and difficult to degrade by using the aromatic organic solvents, so the pollution to the environment is caused.
Therefore, the invention is necessary to invent the cyhalothrin aqueous emulsion and the low-energy emulsification preparation method thereof.
Disclosure of Invention
The invention provides a cyhalothrin aqueous emulsion, which is characterized in that polyether phosphate and vegetable oil are selected, so that the hydrophilic-lipophilic balance can be easily adjusted, and the phosphate has the performances of smoothness, dispersion, wetting and the like, after the vegetable oil is mixed with pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the surface of an oil base, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of a plant, the pesticide has a longer residual effective period, and the defects of difficult degradation, environmental pollution and low pesticide effect performance caused by using an aromatic organic solvent in a synthetic cyhalothrin pesticide are overcome.
In order to achieve the above purpose, the invention provides the following technical scheme: the cyhalothrin aqueous emulsion comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 15% -20%, the auxiliary materials (by mass percentage) comprise vegetable oil: 5% -10%, polyether phosphate: 10-20% of nonylphenol polyoxyethylene ether, 10-30% of phosphate, 5-8% of phenethyl phenol polyoxyethylene, 10-15% of phenethyl phenol and the balance of water.
A low-energy emulsification preparation method of cyhalothrin aqueous emulsion comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, mixing and stirring 15% of cyhalothrin and 5% of vegetable oil to obtain mixed slurry;
s2, adding 10% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 5% of phosphate and continuing stirring for 30-45 min;
s5, adding 10% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol polyoxy 10%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
Preferably, the amount of the vegetable oil used in S1 is not more than 10%.
Preferably, in the step S2, before the mixed slurry is added, the nonylphenol polyoxyethylene ether is heated to 50-60 ℃ to be completely melted, iodine is added to be stirred and dissolved, and the temperature is kept at 50-60 ℃ for 1-3 hours.
Preferably, the stirring speed in S4 is 80 rpm.
Preferably, after stirring and cooling in S5, room temperature ultraviolet sterilization is used.
Preferably, in S7, the stabilizer is glycerol and phosphoric acid.
Preferably, the water used in S7 is purified water.
Preferably, the polyether phosphate is phosphorylated with a phosphorylating agent to form an acylated polyether phosphate.
The invention has the beneficial effects that:
the invention selects the polyether phosphate and the vegetable oil, the polyether phosphate is a compound formed by the phosphorylation esterification of polyether and phosphorylation reagent and the neutralization of inorganic or organic alkali, the hydrophilic-lipophilic balance is easy to be adjusted, the phosphate has the performances of smoothness, dispersion, wetting and the like, after the vegetable oil is mixed with the pesticide according to the proportion of 10 percent, the vegetable oil not only can play the role of activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of the plant, and the longer residual period of the pesticide is ensured, in the synthetic pyrethroid pesticide, the vegetable oil is also a good diluent and is used as an auxiliary agent, the pesticide damage to certain sensitive crops caused by using mineral oil can be avoided, after the vegetable oil is mixed with the pesticide, the good permeability can be generated, the covering surface of the plant can be increased, the plant is not easy to be washed away by rain, and the good pesticide effect can still be kept after rain, the vegetable oil and the pesticide have the characteristic of photolysis after being mixed, the strong drift during spraying can be reduced, the defect that the effective ingredients of the pesticide are reduced due to mineral-containing substances in water is overcome, and the defects that the aromatic organic solvent is difficult to degrade, the environment is polluted and the pesticide effect is not high are solved.
Detailed description of the invention
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1:
the invention provides cyhalothrin aqueous emulsion which comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 15%, the auxiliary materials (by mass percent) comprise vegetable oil: 5%, polyether phosphate: 10 percent of nonylphenol polyoxyethylene ether, 10 percent of phosphate, 5 percent of phenethyl phenol polyoxyethylene, and the balance of water.
A low-energy emulsification preparation method of cyhalothrin aqueous emulsion comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, mixing and stirring 15% of cyhalothrin and 5% of vegetable oil to obtain mixed slurry;
s2, adding 10% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 5% of phosphate and continuing stirring for 30-45 min;
s5, adding 10% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol polyoxy 10%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
Further, the usage amount of the vegetable oil in the S1 can not exceed 10%, after the vegetable oil is mixed with the pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of the plant, the pesticide has a longer residual life, and the usage amount of the vegetable oil can not exceed 10% so as to prevent the spray pipe from being blocked due to excessive foam.
Further, in S2, before the mixed slurry is added, the nonylphenol polyoxyethylene ether is heated to 50-60 ℃ to be completely melted, iodine is added to be stirred and dissolved, and the mixed slurry is kept at 50-60 ℃ for 1-3 hours, wherein the nonylphenol polyoxyethylene ether is stable in property, and the iodine and the nonylphenol polyoxyethylene ether exist in a complex state, so that free iodine can be slowly released, the sterilization effect is durable, the irritation to crops is low, and side effects are not easily generated.
Further, the stirring speed in S4 is 80 r/min, the phosphate ester has the function of a surfactant, has a synergistic effect with other functional agents such as phosphorus, chlorine and sulfur, has high adhesion, low phosphorus content and low corrosion, and has no visible pollutants and no pungent smell.
Further, after stirring and cooling in S5, normal temperature ultraviolet sterilization is used, wherein the emulsifying method comprises the steps of adding 10% of polyether phosphate, heating to about 80 ℃ for emulsification, then stirring and cooling, and finally normal temperature ultraviolet sterilization is used for preventing bacteria from causing harm to crops.
Further, in S7, the stabilizing agents are glycerol and phosphoric acid, so that the stability of the cyhalothrin aqueous emulsion is improved, and no pollution is caused to the environment.
Further, the water used in S7 is purified water which is water containing no impurities or bacteria, such as organic pollutants, inorganic salts, any additive and various impurities, and the concentration of the cyhalothrin aqueous emulsion is diluted, so that the spray pipe is prevented from being blocked, and the water has no harm to crops.
Further, the polyether phosphate and a phosphorylation reagent are subjected to phosphorylation esterification to form acylated polyether phosphate, and due to the existence of a polyoxyethylene ether chain and a terminal phosphate ester bond, the product has acid and alkali resistance and salt resistance of polyoxyethylene ether.
Example 2:
the invention provides cyhalothrin aqueous emulsion which comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 18 percent, and the auxiliary materials (by mass percent) comprise vegetable oil: 6%, polyether phosphate: 15 percent of nonylphenol polyoxyethylene ether, 15 percent of phosphate, 8 percent of phenethyl phenol polyoxyethylene 12 percent and the balance of water.
A low-energy emulsification preparation method of cyhalothrin aqueous emulsion comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, firstly, mixing and stirring 18% of cyhalothrin and 6% of vegetable oil to obtain mixed slurry;
s2, adding 15% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 8% of phosphate and continuing stirring for 30-45 min;
s5, adding 15% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol polyoxy-12%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
Further, the usage amount of the vegetable oil in the S1 can not exceed 10%, after the vegetable oil is mixed with the pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of the plant, the pesticide has a longer residual life, and the usage amount of the vegetable oil can not exceed 10% so as to prevent the spray pipe from being blocked due to excessive foam.
Further, in S2, before the mixed slurry is added, the nonylphenol polyoxyethylene ether is heated to 50-60 ℃ to be completely melted, iodine is added to be stirred and dissolved, and the mixed slurry is kept at 50-60 ℃ for 1-3 hours, wherein the nonylphenol polyoxyethylene ether is stable in property, and the iodine and the nonylphenol polyoxyethylene ether exist in a complex state, so that free iodine can be slowly released, the sterilization effect is durable, the irritation to crops is low, and side effects are not easily generated.
Further, the stirring speed in S4 is 80 r/min, the phosphate ester has the function of a surfactant, has a synergistic effect with other functional agents such as phosphorus, chlorine and sulfur, has high adhesion, low phosphorus content and low corrosion, and has no visible pollutants and no pungent smell.
Further, after stirring and cooling in S5, normal temperature ultraviolet sterilization is used, wherein the emulsifying method comprises the steps of adding 10% of polyether phosphate, heating to about 80 ℃ for emulsification, then stirring and cooling, and finally normal temperature ultraviolet sterilization is used for preventing bacteria from causing harm to crops.
Further, in S7, the stabilizing agents are glycerol and phosphoric acid, so that the stability of the cyhalothrin aqueous emulsion is improved, and no pollution is caused to the environment.
Further, the water used in S7 is purified water which is water containing no impurities or bacteria, such as organic pollutants, inorganic salts, any additive and various impurities, and the concentration of the cyhalothrin aqueous emulsion is diluted, so that the spray pipe is prevented from being blocked, and the water has no harm to crops.
Further, the polyether phosphate and a phosphorylation reagent are subjected to phosphorylation esterification to form acylated polyether phosphate, and due to the existence of a polyoxyethylene ether chain and a terminal phosphate ester bond, the product has acid and alkali resistance and salt resistance of polyoxyethylene ether.
Example 3:
the invention provides cyhalothrin aqueous emulsion which comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 15%, the auxiliary materials (by mass percent) comprise vegetable oil: 5%, polyether phosphate: 20 percent of nonylphenol polyoxyethylene ether, 20 percent of phosphate, 7 percent of phenethyl phenol polyoxyethylene, 15 percent of phenethyl phenol and the balance of water.
A low-energy emulsification preparation method of cyhalothrin aqueous emulsion comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, mixing and stirring 15% of cyhalothrin and 5% of vegetable oil to obtain mixed slurry;
s2, adding 20% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 7% of phosphate and continuing stirring for 30-45 min;
s5, adding 20% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol for polyoxy-15%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
Further, the usage amount of the vegetable oil in the S1 can not exceed 10%, after the vegetable oil is mixed with the pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of the plant, the pesticide has a longer residual life, and the usage amount of the vegetable oil can not exceed 10% so as to prevent the spray pipe from being blocked due to excessive foam.
Further, in S2, before the mixed slurry is added, the nonylphenol polyoxyethylene ether is heated to 50-60 ℃ to be completely melted, iodine is added to be stirred and dissolved, and the mixed slurry is kept at 50-60 ℃ for 1-3 hours, wherein the nonylphenol polyoxyethylene ether is stable in property, and the iodine and the nonylphenol polyoxyethylene ether exist in a complex state, so that free iodine can be slowly released, the sterilization effect is durable, the irritation to crops is low, and side effects are not easily generated.
Further, the stirring speed in S4 is 80 r/min, the phosphate ester has the function of a surfactant, has a synergistic effect with other functional agents such as phosphorus, chlorine and sulfur, has high adhesion, low phosphorus content and low corrosion, and has no visible pollutants and no pungent smell.
Further, after stirring and cooling in S5, normal temperature ultraviolet sterilization is used, wherein the emulsifying method comprises the steps of adding 10% of polyether phosphate, heating to about 80 ℃ for emulsification, then stirring and cooling, and finally normal temperature ultraviolet sterilization is used for preventing bacteria from causing harm to crops.
Further, in S7, the stabilizing agents are glycerol and phosphoric acid, so that the stability of the cyhalothrin aqueous emulsion is improved, and no pollution is caused to the environment.
Further, the water used in S7 is purified water which is water containing no impurities or bacteria, such as organic pollutants, inorganic salts, any additive and various impurities, and the concentration of the cyhalothrin aqueous emulsion is diluted, so that the spray pipe is prevented from being blocked, and the water has no harm to crops.
Further, the polyether phosphate and a phosphorylation reagent are subjected to phosphorylation esterification to form acylated polyether phosphate, and due to the existence of a polyoxyethylene ether chain and a terminal phosphate ester bond, the product has acid and alkali resistance and salt resistance of polyoxyethylene ether.
Example 4:
the invention provides cyhalothrin aqueous emulsion which comprises main materials and auxiliary materials, wherein the main materials comprise cyhalothrin (in percentage by mass): 20%, the auxiliary materials (by mass percentage) comprise vegetable oil: 5%, polyether phosphate: 10 percent of nonylphenol polyoxyethylene ether, 10 percent of phosphate, 8 percent of phenethyl phenol polyoxyethylene, and the balance of water.
A low-energy emulsification preparation method of cyhalothrin aqueous emulsion comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, firstly, mixing and stirring 20% of cyhalothrin and 5% of vegetable oil to obtain mixed slurry;
s2, adding 10% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 8% of phosphate and continuing stirring for 30-45 min;
s5, adding 10% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol polyoxy 10%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
Further, the usage amount of the vegetable oil in the S1 can not exceed 10%, after the vegetable oil is mixed with the pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, the sprayed liquid medicine can uniformly cover the surface of the plant, the pesticide has a longer residual life, and the usage amount of the vegetable oil can not exceed 10% so as to prevent the spray pipe from being blocked due to excessive foam.
Further, in S2, before the mixed slurry is added, the nonylphenol polyoxyethylene ether is heated to 50-60 ℃ to be completely melted, iodine is added to be stirred and dissolved, and the mixed slurry is kept at 50-60 ℃ for 1-3 hours, wherein the nonylphenol polyoxyethylene ether is stable in property, and the iodine and the nonylphenol polyoxyethylene ether exist in a complex state, so that free iodine can be slowly released, the sterilization effect is durable, the irritation to crops is low, and side effects are not easily generated.
Further, the stirring speed in S4 is 80 r/min, the phosphate ester has the function of a surfactant, has a synergistic effect with other functional agents such as phosphorus, chlorine and sulfur, has high adhesion, low phosphorus content and low corrosion, and has no visible pollutants and no pungent smell.
Further, after stirring and cooling in S5, normal temperature ultraviolet sterilization is used, wherein the emulsifying method comprises the steps of adding 10% of polyether phosphate, heating to about 80 ℃ for emulsification, then stirring and cooling, and finally normal temperature ultraviolet sterilization is used for preventing bacteria from causing harm to crops.
Further, in S7, the stabilizing agents are glycerol and phosphoric acid, so that the stability of the cyhalothrin aqueous emulsion is improved, and no pollution is caused to the environment.
Further, the water used in S7 is purified water which is water containing no impurities or bacteria, such as organic pollutants, inorganic salts, any additive and various impurities, and the concentration of the cyhalothrin aqueous emulsion is diluted, so that the spray pipe is prevented from being blocked, and the water has no harm to crops.
Further, the polyether phosphate is phosphorylated with a phosphorylation reagent to form acylated polyether phosphate, and due to the existence of a polyoxyethylene ether chain and a terminal phosphate ester bond, the product has acid and alkali resistance and salt resistance of polyoxyethylene ether.
The cyhalothrin aqueous emulsions prepared in examples 1-4 above were compared on the same crop to obtain the following data:
as can be seen from the above table, the aqueous emulsion of cyhalothrin prepared in the examples 1-4 has better performances in insecticidal rate, degradation time and stability, but different proportions in matching result in different effects in insecticidal rate, degradation time and stability, wherein the invention is selected to easily adjust the hydrophilic-lipophilic balance and the performances of smoothness, dispersion, wetting and the like of phosphate by selecting polyether phosphate and vegetable oil, after the vegetable oil is mixed with pesticide according to the proportion of 10%, the vegetable oil not only can play a role in activating the oil-based surface, but also is a good anti-volatile agent, can uniformly cover the sprayed liquid medicine on the surface of plants, and ensures that the pesticide has longer residual effective period, in the synthetic pyrethroid pesticide, the problems of difficult degradation due to the use of aromatic organic solvent, environmental pollution and poor exertion of pesticide effect are solved, after the pesticide composition is used, the effect of example 4 is optimal, the stability of the performance is maintained on the basis of a certain insecticidal rate, the degradation time is shortened, and the damage to crops is minimized.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (9)
1. The cyhalothrin aqueous emulsion comprises a main material and an auxiliary material, and is characterized in that: the main materials (by mass percent) comprise cyhalothrin: 15% -20%, the auxiliary materials (by mass percentage) comprise vegetable oil: 5% -10%, polyether phosphate: 10-20% of nonylphenol polyoxyethylene ether, 10-30% of phosphate, 5-8% of phenethyl phenol polyoxyethylene, 10-15% of phenethyl phenol and the balance of water.
2. A low-energy emulsification preparation method of cyhalothrin aqueous emulsion is characterized in that: the method comprises the following specific steps:
s1, in the preparation of the cyhalothrin aqueous emulsion, mixing and stirring 15% of cyhalothrin and 5% of vegetable oil to obtain mixed slurry;
s2, adding 10% of nonylphenol polyoxyethylene ether into the mixed slurry, putting the mixed slurry into a container, and stirring;
s3, placing the mixed slurry into a stirring container, standing for 5-8h, and dissolving;
s4, after dissolving for 20-35min, adding 5% of phosphate and continuing stirring for 30-45 min;
s5, adding 10% of polyether phosphate into the stirred mixed slurry, heating to about 80 ℃ for emulsification, and then stirring and cooling;
s6, adding phenethyl phenol polyoxy 10%, heating to 50 ℃ and maintaining for 1 h;
and S7, finally adding the stabilizer and the water into the uniform mixed solution and uniformly stirring to obtain the milky-white cyhalothrin aqueous emulsion.
3. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: the amount of the vegetable oil used in the S1 can not exceed 10%.
4. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: heating nonylphenol polyoxyethylene ether to 50-60 ℃ for complete melting before adding the mixed slurry in the S2, adding iodine, stirring for dissolving, and preserving heat at 50-60 ℃ for 1-3 hours.
5. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: the stirring speed in S4 was 80 rpm.
6. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: and (4) stirring and cooling in the step S5, and then sterilizing by using normal-temperature ultraviolet rays.
7. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: in the S7, the stabilizing agents are glycerol and phosphoric acid.
8. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: the water used in S7 is purified water.
9. The low-energy emulsification preparation method of cyhalothrin aqueous emulsion as claimed in claim 2, characterized in that: the polyether phosphate is phosphorylated with a phosphorylating agent to form an acylated polyether phosphate.
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| CN (1) | CN112219857A (en) |
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| CN111802384A (en) * | 2020-08-03 | 2020-10-23 | 江苏剑牌农化股份有限公司 | Cyhalothrin water emulsion pesticide with low skin irritation and its preparation method |
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| CN101233857A (en) * | 2008-01-09 | 2008-08-06 | 武汉大学 | Cyhalothrin aqueous emulsion and low energy emulsification preparation thereof |
| CN101438700A (en) * | 2009-01-08 | 2009-05-27 | 陈琳 | Pyrethroid pesticide aqueous emulsion and method for preparing the same |
| CN101606540A (en) * | 2009-07-21 | 2009-12-23 | 杨小娇 | High-performance cyhalothrin pesticide aqueous emulsion and preparation method thereof |
| CN101790978A (en) * | 2009-12-02 | 2010-08-04 | 深圳诺普信农化股份有限公司 | Pesticide emulsion in water and preparation method thereof |
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| CN105145619A (en) * | 2015-07-09 | 2015-12-16 | 广州大学 | Pyrethroid pesticide aqueous emulsion and preparation method thereof |
| CN105638660A (en) * | 2015-12-20 | 2016-06-08 | 广东中迅农科股份有限公司 | Pesticide emulsion in water and preparation process thereof |
| CN106212448A (en) * | 2016-08-15 | 2016-12-14 | 曹正祥 | A kind of production technology of pesticide emulsion in water |
| CN106332876A (en) * | 2016-08-20 | 2017-01-18 | 广东中迅农科股份有限公司 | Pyrethroid-pesticide-containing emulsion in water and preparation method thereof |
| CN111802384A (en) * | 2020-08-03 | 2020-10-23 | 江苏剑牌农化股份有限公司 | Cyhalothrin water emulsion pesticide with low skin irritation and its preparation method |
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