CN1033419C - Formulation of organophosphorus pesticide water emulsion - Google Patents
Formulation of organophosphorus pesticide water emulsion Download PDFInfo
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- CN1033419C CN1033419C CN 91103386 CN91103386A CN1033419C CN 1033419 C CN1033419 C CN 1033419C CN 91103386 CN91103386 CN 91103386 CN 91103386 A CN91103386 A CN 91103386A CN 1033419 C CN1033419 C CN 1033419C
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Abstract
The present invention relates to a formula for water emulsion as agricultural chemicals, which belongs to the technology for processing agricultural chemicals. The present invention adopts the technical formula that water-insoluble liquid organophosphorus agricultural chemicals(fenitrothion, malathion, methyl parathion, methyl isothion, phenthoate, etc.), emulsifying agents (alkyl-aryl-polyoxyalkylene polyoxypropylene ether, alkyl-aryl-formaldehyde resin polyoxyalkylene ether), stabilizing agents(alkylphenol polyoxyalkylene ether phosphonate ester), antifreezing agents(ethylene glycol, polyethylene glycol, glycerol and urea) and water are prepared into water emulsion by homogenization technology. The water emulsion has the advantages of no organic solvent, no risk of combustion explosion and small odor of agricultural chemicals; the water emulsion can reduce the cost and the toxicity and can be directly used for trace quantity spraying with airplanes or on the ground.
Description
The present invention relates to water-insoluble liquid organophosphorous pesticide crude oil, add,, make the pesticide processing preparation technique field of high concentration milky liquid aqueous emulsion through the homogenize technical process with emulsifier, stabilizing agent, antifreezing agent and water.
Aqueous emulsion (water emulsion) past attempts claims emulsifiable concentrate (emulsion concentrate), for the dispersion of water-insoluble liquid pesticidal crude oil, emulsification, be suspended in the opaque emulsifiable concentrate pesticidal preparations in the aqueous media, thin up emulsion (emulsion).Concerning the masses that lack agricultural chemicals professional knowledge, be easy to obscure mutually with missible oil (emulsitiable concentrate) commonly used in the past, missible oil is for using agricultural chemicals crude oil, emulsifier, the formulated single-phase clear solution preparation of organic solvent, and thin up just can become opaque emulsion.
Aqueous emulsion is a novel form leaved for development field, aqueous emulsion has the advantage of missible oil and cost is lower than missible oil, from the contrast of control efficiency and expenses for prevention and control, just can see that aqueous emulsion has remarkable economic efficiency and social benefit, thereby have development prospect and vitality.Aqueous emulsion can replace a considerable amount of cream preparations, the missible oil kind that particularly China's tonnage is bigger, and become a kind of emerging formulations of pesticide.
Nineteen fifty-seven, comrade such as my Wang Jun of institute Kui studied the carbolineum emulsifiable concentrate, paid with paper mill, Yingkou and produced lignosulfite concentrate (containing solids 46%), added Shijingshan steel plant and paid product carbolineum (1.12,20 ℃ of proportions; The cut that is higher than 270 ℃ is 47%), under agitation grinding, make carbolineum be dispersed into the little oil droplet of 1-5 micron, along with the increase of carbolineum addition, whole system viscosity also increases gradually, add suitable water and carry out desaturation, add carbolineum again, continue dispersion grinding, viscosity is increased once more, add entry and carbolineum successively, can make 50-60% carbolineum emulsifiable concentrate, only be 7.5-12% and contain the lignosulfite solids.50-100 times of liquid usefulness, control wintering of fruit tree two spotted spider mite ovum, respond well, but because of carbolineum has poisoning to crop (cotton, beans, melon), use is restricted, and is easy to layering during storage, so do not drop into industrial production.
1958 U.S. Shi Duofu chemical company (Stauffer Chemical Company) parathion emulsifiable concentrate commodity selling is arranged.
My comrade Wang Junkui of institute delivered the trial-production research report about 25% dichlorodiphenyl trichloroethane emulsifiable concentrate in 1963.Its prescription is: ddt powder 25.1%, motor benzene 36.0%, diesel oil 2.0%, soda pulping waste solids 3.0%, urea 3.0% draws back powder 0.05%, and water 30.85%, 1962 year is produced 3 tons in Beijing insecticide factory, said preparation is on 3200 rev/mins of centrifuges, and is centrifugal 9 hours, not stratified.50 ℃ the storage 14 days, degree of fixation does not descend ,-23 ℃ freezing 14 days ,-50 ℃ freezing 7 days, be placed on again under the room temperature, still the dichlorodiphenyl trichloroethane crystallization does not appear in resilient.Cost only is 2/3rds of 25% a dichlorodiphenyl trichloroethane missible oil, and drug effect and missible oil are suitable.
The U.S. in 1974 makes oil-in-water emulsion in the publication (clear 49-54547) of Japanese publication with parathion, malathion, diazinon, disulfoton.With water-insoluble organophosphorus insecticide, it is in the micella of 1000 dusts following (preferably diameter is that 500 dusts are following) that there is diameter in bag, forming organic facies is the emulsion system of discontinuous phase form, it is insoluble organophosphorus insecticide, exist to be dissolved in the form in the micella below diameter 1000 dusts, the formation transparency is good, the oil-in-water emulsion that thermodynamic stability is strong.As: water-insoluble organophosphorus insecticide 0.001-5%, emulsifier 0.001-20%, cosolvent 0.001-15%, surplus is water (60-99.997%).
1977 Japanese publication (clear 52-122628) be the emulsifier of oil-in-water insect agent, be with formaldehyde and (I) condensation product.
R
1=alkyl phenyl, benzyl, cumenyl, phenyl, styryl.
R
2=H or alkyl.
n+n’＝6-40
Example: sumithion 10%, diphenylethyllene phenyl formaldehyde resin polyoxyethylene polyoxypropylene ether 50%, water 40%, the emulsion of the oil-in-water type of making, at room temperature stable.
1978 Japan Patent (clear 53-13696) be water-based formulation insecticide, be organophosphorus insecticide emulsifiable concentrate preparation, replace organic solvent with water, contain organic agricultural chemicals 5-20%, interfacial agent 5-60%, stabilizing agent (epoxides) 0.5-3%, some condition (pH3.5-7.5) of control preparation, prevent the hydrolysis of active ingredient in the preparation, and make a kind of novel form of long-term stability.The pesticide species that uses has: fenthion, sumithion, diazinon, malathion, ronnel, chlorophos, chlopyrifos, phenthoate dimephenthoate cidial, Rogor, thiometan, phoxim, cyanophos etc.Example: malathion 10 grams, triphenylethylene base phenyl APEO (ethylene molecule number=12) 20 grams, NaLS 1 gram, after the mixing, (1/15M sodium hydrogen phosphate 1 volume is with the mixed liquor of 1/15M dipotassium hydrogen phosphate 9 volumes to add pH adjustment agent, pH5.9) 69 grams, slowly notes add, and fully stir simultaneously, and dissolving forms transparent and homogeneous liquid, 40 ℃ of 8 all resolution ratio 3.52%, (5-35 ℃) 1 year resolution ratio 4.16% under the room temperature.
1979 Japanese publication (clear 54-31566) be the oil-in-water emulsion of desinsection.2-10% poly-vinyl alcohol solution, or the 0.1-2.0% gum Arabic is tackifier is with organophosphorus insecticide (solvability in the water, at 10 ℃ less than 1000ppm person) and add the water allotment.Make oil-in-water emulsion, this emulsion is better than the missible oil of active ingredient in organic solvent, has good performance.Example: sumithion 10 gram, 10% polyoxyethylene alcoholic solution, 40 grams, 20%Agrisol FL-100F 50 grams are made emulsion, kept 3 months at 40 ℃, resolution ratio only 0.7%, sumithion is precipitation not.
Japan was dope body desinsection constituent in the patent (CA 1054049) of Canada's application in 1979, can be soluble in water in order to make insecticide, and certain amount of surfactant, be added in the water liquid of insecticide, and make stable high concentration organophosphorus insecticide water liquid.Example: fenthion 5 grams, two (styryl aminomethyl phenyl) APEO, 15 grams, the emulsifiable concentrate that is mixed with, degree of fixation and insecticidal activity are suitable with fenthion missible oil.
French patent (clear 56-120609) in Japanese publication in 1981 is 20-55% zolone emulsifiable concentrate.Its method for making is: in the container of 52 ℃ of insulations, add 575 milliliters of hot water, antifreeze glycol 50 grams, cloudy example interfacial agent (Soprophor FL) 50 grams, mixed liquor add zolone 500 grams of fusion under high degree of agitation, make emulsion, grind to have the ball mill that chuck can cool off rapidly,, add tackifier xanthans (RhodopolXB again to being 0.5-10 micron (wherein 90% particle diameter is the 2-5 micron) at 25 ℃ of particle diameters
11), make the zolone aqueous suspension.20 ℃ were not had precipitation in 3 months, and 35 ℃ still can keep the suspension state in 3 months, did not have tangible chemometamorphism.
1981 Japanese publication (clear 56-49303, clear 56-49307) be the outstanding turbid shape insecticide acaricide composition of oil-in-water type.Contain synthesis of pyrethrin ester 1-50%, polyvinyl alcohol or gum Arabic 2-10%, tackifier 0.1-20%, surplus is a water, through homogenizer homogenize 5 minutes, particle diameter 1-40 micron, 1.0%, 6 month resolution ratio 3.5% of 0%, 3 month resolution ratio of 50 ℃ of 1 month resolution ratios.
Nineteen eighty-two Japan's publication (clear 57-171431) makes things convenient for autofrettage for the economy of the good oil-in-water emulsion of stable homogeneous.With the solvent that can be dissolved or disperse by the interfacial agent high concentration, with the HLB value be non-ionic surfactant more than 2, or both sexes interfacial agent, or ionic interfacial agent, single with or use with, and mixing for oily matter aqueous or paste below 100 ℃, add water, make oil-in-water emulsion, can be applicable to medicine, food, cosmetics, coating, fiber, each field of agricultural chemicals.
The seventies and the eighties constantly disclose many patents about aqueous emulsions abroad, and organophosphorus pesticide water emulsion is described, have been subjected to pesticidal preparations researcher's concern.
The objective of the invention is to overcome the defective in the above-mentioned prior art, propose several formulation of organophosphorus pesticide water emulsion and processing technology thereof, make the water emulsion pesticide formulation can be suitable for producing.
Below be described in detail main contents of the present invention:
Organophosphorus pesticide water emulsion provided by the present invention is made through homogenize technology by organophosphorous pesticide, emulsifier, stabilizing agent, antifreezing agent and water.Fig. 1 is a process chart of the present invention.
Five kinds of aqueous emulsions of the present invention, its organophosphorous pesticide adopts one of following kind: sumithion, malathion, Isofenphos methyl, phenthoate dimephenthoate cidial, parathion-methyl.
The selected emulsifier of the present invention is one of two kinds of alkylaryl polyoxyethylene, polyethenoxy ether (II) and alkylaryl formaldehyde resin APEOs (III), its consumption is at least 2%, be up to 10%, be advisable with 5-7%, it can keep the emulsified state of aqueous emulsion long-term stability.
The used stabilizing agent of the present invention is one of following six kinds: hydroquinones, expoxy propane phenyl ether, pH6.6 buffer solution, tributyl phosphate, epoxide oxygen propane, alkylphenol polyoxyethylene phosphate (IV).Be best with tributyl phosphate, alkylphenol polyoxyethylene phosphate among these six kinds, they itself promptly are stabilizing agents, are again emulsifier, have double utility, can reduce the consumption of emulsifier.Select for use the criterion of acceptability of stabilizing agent to be: 54 ± 2 ℃, heat storage two all resolution ratios are less than 10%.
Antifreezing agent of the present invention is one of following four kinds: ethylene glycol, polyethylene glycol, glycerine, urea.Be best with urea among these four kinds, because the urea source is sufficient, low price, and has a fertilizer efficiency effect, also can increase the proportion of preparation, accelerate the skyborne sinking speed of droplet, reduce water evaporates and drift distance, be suitable for aircraft and ground ulv spraying, said preparation did not freeze at-10 ℃ in 24 hours.
Below narrate the composition of five kinds of aqueous emulsions of the present invention respectively:
1, sumithion aqueous emulsion (by weight percentage): sumithion 30-60; Emulsifier 5-7; Stabilizing agent 1-3; Antifreezing agent 5-8; Surplus is a water.
2, the malathion aqueous emulsion is formed (by weight percentage): malathion 30-60; Emulsifier 5-7; Stabilizing agent 1-3; Antifreezing agent 5-8; Surplus is a water.
3, the Isofenphos methyl aqueous emulsion is formed (by weight percentage): Isofenphos methyl 30-60; Emulsifier 5-7; Stabilizing agent 1-3; Antifreezing agent 5-8; Surplus is a water.
4, the phenthoate dimephenthoate cidial aqueous emulsion is formed (by weight percentage): phenthoate dimephenthoate cidial 30-60; Emulsifier 5-7; Stabilizing agent 1-3; Antifreezing agent 5-8; Surplus is a water.
5, the parathion-methyl aqueous emulsion is formed (by weight percentage): parathion-methyl 30-60; Emulsifier 5-7; Stabilizing agent 1-3; Antifreezing agent 5-8; Surplus is a water.
Below be described in detail embodiments of the invention:
One, 50% sumithion aqueous emulsion
Get 61 kilogram (83% * 61=50.63) of 83% sumithion crude oil, 5 kilograms of emulsifier alkylaryl polyoxyethylene poly-oxygen propylene aethers, 2 kilograms of the buffer solutions of stabilizing agent pH6.6,5 kilograms of antifreezing agent polyethylene glycol, 28.3 kilograms in water, through Over emulsfication, homogenize, detection, packing, promptly make 50% sumithion aqueous emulsion.
This product appearance is a light brown yellow emulsion, 1.18 ± 0.02 ℃ of proportions (20 ℃), and viscosity 100-600 centipoise, dispersive property is better in the water, surface tension (1000 times of liquid) 40-50 dynes per centimeter
2, emulsion stability (4000 rev/mins, 5 minutes) is stable, average oil droplet diameter (1000 times of liquid) 1.7-1.8 micron, and-10 ℃ were not freezed in 24 hours.
Technical target of the product: sumithion content 〉=30%, stability of emulsion (diluting 500 times) is better, pH value 5-7, storage-stable good (54 ± 2 ℃, heat two weeks of storage, resolution ratio≤10%),-10--15 ℃ of cold storage 24 hours still can recover original physical and chemical character under the room temperature.This product can be preserved more than 3 years and not decompose under the normal temperature.
Toxicity test result:
Table one 50% sumithion aqueous emulsion is to cotton bollworm larvae toxicity test table as a result
(on October 21st, 1988, this institute of Beijing Ma Lianwa)
| Reagent agent | Regression equation | LC 50(ppm) | LC 50Confidence limit | Relative virus force |
| 50% sumithion aqueous emulsion | Y＝0.4816 +2.5999x | 54.6891 | 40.0286 -74.7223 | 1 |
| 50% sumithion cream | Y＝0.3366 +2.1095x | 162.4179 | 116.5617 -226.3193 | 2.9698 |
50% sumithion aqueous emulsion is higher than 50% sumithion cream to the virulence of cotton bollworm.The ratio of both virulence is 1: 3, and promptly virulence increases by 2 times, can prove absolutely that aqueous emulsion agent is more superior than the virulence of missible oil formulation.
Table two 10% sumithion aqueous emulsion and missible oil are to insect toxicity test table as a result
| For the examination insect | Test method | 10% aqueous emulsion | 10% missible oil | |
| Common house-fly grub man mosquito larvae adult housefly blattaria | Dipping method dipping method medicine film contact method medicine film contact method | LC 50 LC 50 KT 50 KT 50 | 0.22ppm 0.008ppm 121 minutes 142 minutes | 0.25ppm 0.009ppm 110 minutes 130 minutes |
The sumithion aqueous emulsion is higher than sumithion cream to the insecticidal toxicity for the examination insect, and to the virulence of knocking down for the examination insect, then the aqueous emulsion effect is not as missible oil, and this is the effect in default of organic solvent.
The toxicity test result:
Table three 50% sumithion aqueous emulsion and missible oil are to rat acute toxicity test table as a result
(Jiangxi Medical College toxicological study chamber on June 11 nineteen ninety)
| The toxicity test reagent agent | Rat peroral acute toxicity | Rat is through the skin acute toxicity | ||
| LD 50mg/kg | Relative toxicity | LD 50mg/kg | Relative toxicity | |
| 50% sumithion aqueous emulsion, 50% sumithion cream | 1218 621 | 1 0.5 | 2397 1598 | 1 0.67 |
50% sumithion aqueous emulsion is that the acute toxicity of big white mouse is lower than 50% sumithion cream to SD.The per os relative toxicity is 1: 0.5, and promptly toxicity lowers 1/2; Through skin-deep be to be at 1: 0.67 that toxicity lowers 1/3 to toxicity, all belong to low toxicity.
Field control effectiveness test:
(annotate: this specification removes in the literary composition and indicates year in addition especially, and other is 1989)
Table four 50% sumithion aqueous emulsion field control effectiveness test is table as a result
| Date | The place | Area | Controlling object | Active drug gram/mu | Dosage kg/N | Preventive effect (%) | Test unit |
| 8.30 8.30 6.26 5.26 7.26 7.26 7.26-8.3 9.6 9.17 9.18 9.30 10.9 September | Ganzhou, Longnan County, Jiangxi, city, Ganzhou, Longnan County, Nankang County Jiangxi, prosperous Jiangxi, northeast, Xinxiang County Beijing, Xinxiang County Henan, Xinxiang County Henan, Xinxiang County Henan, Xinxiang County Henan, Ma Lianwa Henan, Ma Lianwa Beijing, Beijing city | 3560 mu of 2000 mu of plot experiment plot experiments of plot experiment plot experiment plot experiment plot experiment plot experiment plot experiment plot experiment plot experiment plot experiments | The cotton big leaf folder bollworm cotton seedling aphids cotton aphid bollworm cotton aphid cabbage caterpillar four generations yellow rice borer four generations yellow rice borer four generations yellow rice borer oryza chinensis four generations yellow rice borer of bollworm | 25 25 40 20 40 20-40 40 30 24 24 40 33 16-24 | 100 100 100 50 100 100 100 little sprays 0.1 100 100 100 100 80 | 100 100 81.8 99.1 82.4 67.5- 77.2 85- 90 100 93.25 95.37 72.25 95.0 88.5 | Plant protection unit Longnan County, plant protection unit Ganzhou Prefecture, this institute of this institute of this institute of this institute of this institute of this institute of this institute of this institute Nankang County plant protection unit Longnan County plant protection unit Ganzhou Prefecture plant protection unit |
Two, 50% malathion aqueous emulsion
Get 63 kilogram (80% * 63=50.4) of 80% malathion crude oil, 6 kilograms of emulsifier alkylaryl formaldehyde resin APEOs, 2 kilograms of stabilizing agent hydroquinones, 6 kilograms of antifreezing agent glycerine, 23.8 kilograms in water, through Over emulsfication, homogenize, detection, packing, promptly make 50% malathion aqueous emulsion.
This product appearance is a milky white emulsion, proportion 1.15 ± 0.02 (20 ℃), viscosity 100-600 centipoise, good dispersion property in the water, surface tension (1000 times of liquid) 40-50 dynes per centimeter
2, emulsion stability (4000 rev/mins, 5 minutes) is stable, average oil droplet diameter (1000 times of liquid) 1.7-1.8 micron, and 6.64% ,-10 ℃ of heat storage resolution ratios were not freezed in 24 hours.
Technical target of the product: malathion content 〉=30%, stability of emulsion (diluting 500 times) is qualified, pH5-7, (54 ± 2 ℃ of excellent storage stabilities, heat storage two all resolution ratios≤10%),-10--15 ℃ of cold storage still can recover original physical and chemical character under the room temperature in 24 hours, and this product can be preserved more than 3 years under the room temperature, any decomposition do not occur.Field control effectiveness test:
Table five 50% malathion aqueous emulsion field control effectiveness test is table as a result
| Date | The place | Area | Controlling object | Effective dose g/ mu | Dosage Kg/ mu | Preventive effect (%) | Test unit |
| 5.26 5.26 5.26 6.6 9.6 | Xinxiang County Xinjiang, Xinxiang County Henan, Xinxiang County Henan, Henan Beijing, Tuoli County northeast Wang Xiang | Small plot experiment small plot experiment small plot experiment small plot experiment small plot experiment | Cotten aphid cotten aphid cotten aphid locust cabbage caterpillar | 20 30 40 40 30 | 50 50 50 0.1 ulv sprayings, 0.1 ulv spraying | 94.4 99.1 97.8 95.7 100 | This institute of this institute of this institute of this institute of this institute |
Three, 30% Isofenphos methyl aqueous emulsion
Get 50 kilogram (60% * 50=30) of 60% Isofenphos methyl crude oil, 5 kilograms of emulsifier alkylaryl polyoxyethylene poly-oxygen propylene aethers, 3 kilograms of stabilizing agent tributyl phosphates, 5 kilograms in antifreezing agent urea, 37 kilograms in water, through Over emulsfication, homogenize, detection, packing, promptly make 30% Isofenphos methyl aqueous emulsion.
This product appearance is a milky white emulsion, and proportion is 1.06 ± 0.02 (20 ℃), viscosity 100-600 centipoise, good dispersion property in the water, surface tension (1000 times of liquid) 40-50 dynes per centimeter
2, emulsion stability (4000 rev/mins, 5 minutes) is stable, average oil droplet diameter (1000 times of liquid) 1.7-1.8 micron, and heat storage resolution ratio is 7.70% ,-10 ℃ and did not freeze in 24 hours.
Technical target of the product: Isofenphos methyl content 〉=30%, stability of emulsion qualified (diluting 500 times), pH value 5-7, (54 ± 2 ℃ of bin stabilities, heat storage two all resolution ratios≤10%) good,-10 ℃--15 ℃ of cold storages 24 hours, still can recover original physical and chemical character under the room temperature, this product can be preserved more than 3 years under the normal temperature.
Field control effectiveness test:
Table six 30% Isofenphos methyl aqueous emulsion field control effectiveness test is table as a result
| Date | The place | Area | Controlling object | Effective dose g/ mu | Dosage Kg/ mu | Preventive effect (%) | Test unit |
| 5.26 5.26 5.26 6.6 9.6 | Xinxiang County Xinjiang, Xinxiang County Henan, Xinxiang County Henan, Henan Beijing, Tuoli County northeast Wang Xiang | Small plot experiment small plot experiment small plot experiment small plot experiment small plot experiment | Cotten aphid cotten aphid cotten aphid locust cabbage caterpillar | 20 30 40 30 30 | 50 50 50 0.1 ulv sprayings, 0.1 ulv spraying | 92.1 96.5 98.5 86.8 100 | This institute of this institute of this institute of this institute of this institute |
Four, 50% phenthoate dimephenthoate cidial aqueous emulsion
Get 55 kilograms of 92% phenthoate dimephenthoate cidial crude oil (92% * 55=50.6), 7 kilograms of emulsifier alkylaryl formaldehyde resin APEOs, 3 kilograms of stabilizing agent epoxychloropropane, 8 kilograms of antifreezing agent glycerine, 28.2 kilograms in water through emulsification, homogenize, detection, packing, is promptly made 50% phenthoate dimephenthoate cidial aqueous emulsion.
This product appearance is a milky white emulsion, and proportion is 1.13 ± 0.02 (20 ℃), viscosity 100-600 centipoise, good dispersion property in the water, surface tension (1000 times of liquid) 40-50 dynes per centimeter
2, emulsion stability (4000 rev/mins, 5 minutes) is stable, average oil droplet diameter (1000 times of liquid) 1.7-1.8 micron, and heat storage resolution ratio is 7.29% ,-10 ℃ and did not freeze in 24 hours.
Technical target of the product: phenthoate dimephenthoate cidial content 〉=30%, stability of emulsion qualified (diluting 500 times), pH value 5-7, (54 ± 2 ℃ of bin stabilities, heat storage two all resolution ratios≤10%) good,-10 ℃--15 ℃ of cold storages 24 hours, still can recover original physical and chemical character under the room temperature, this product can be preserved more than 3 years under the normal temperature.
Field control effectiveness test:
Table seven 50% phenthoate dimephenthoate cidial aqueous emulsion field control effectiveness test is table as a result
| Date | The place | Area | Controlling object | Effective dose g/ mu | Dosage Kg/ mu | Preventive effect (%) | Test unit |
| 5.26 5.26 5.26 6.6 9.6 | Xinxiang County Xinjiang, Xinxiang County Henan, Xinxiang County Henan, Henan Beijing, Tuoli County northeast Wang Xiang | Small plot experiment small plot experiment small plot experiment small plot experiment small plot experiment | Cotten aphid cotten aphid cotten aphid locust cabbage caterpillar | 20 30 40 40 30 | 50 50 50 0.1 ulv sprayings, 0.1 ulv spraying | 97.2 99.5 99.5 97.5 100 | This institute of this institute of this institute of this institute of this institute |
Five, 50% parathion-methyl aqueous emulsion
Get 56 kilogram (90% * 56=50.4) of 90% parathion-methyl crude oil, 5 kilograms of emulsifier alkylaryl formaldehyde resin APEOs, 1 kilogram of stabilizing agent expoxy propane phenyl ether, 5 kilograms of antifreezing agent glycerine, 33.8 kilograms in water, through emulsification, homogenize, detection, packing, promptly make 50% parathion-methyl aqueous emulsion.
This product appearance is a light brown yellow emulsion, and proportion is 1.20 ± 0.02 (20 ℃), viscosity 100-600 centipoise, good dispersion property in the water, surface tension (1000 times of liquid) 40-50 dynes per centimeter
2, emulsion stability (4000 rev/mins, 5 minutes) is stable, average oil droplet diameter (1000 times of liquid) 1.7-1.8 micron, and heat storage resolution ratio is 8.87% ,-10 ℃ and did not freeze in 24 hours.
Technical target of the product: parathion-methyl content 〉=30%, stability of emulsion qualified (diluting 500 times), pH value 5-7, (54 ± 2 ℃ of bin stabilities, heat storage two all resolution ratios≤10%) good,-10 ℃--15 ℃ of cold storages 24 hours, still can recover original physical and chemical character under the room temperature, this product can be preserved more than 3 years under the normal temperature.
Field control effectiveness test:
Table eight 50% parathion-methyl aqueous emulsion field control effectiveness test is table as a result
| Date | The place | Area | Controlling object | Effective dose g/ mu | Dosage Kg/ mu | Preventive effect (%) | Test unit |
| 5.26 5.26 5.26 9.6 | Xinxiang County Beijing, Xinxiang County Henan, Xinxiang County Henan, Henan northeast Wang Xiang | Small plot experiment small plot experiment small plot experiment small plot experiment | Cotten aphid cotten aphid cotten aphid cabbage caterpillar | 20 30 40 30 | 50 50 50 0.1 ulv sprayings | 95.2 97.1 99.8 100 | This institute of this institute of this institute of this institute |
The present invention compares than prior art has following good effect:
1, the active constituent content height of organophosphorus pesticide water emulsion of the present invention is with existing suitable with missible oil content. And in the past the active constituent content of reported in literature organophosphorus pesticide water emulsion is very low, only is 0.001-5%, the highlyest also is no more than 20%.
2, the interfacial agent consumption of organophosphorus pesticide water emulsion of the present invention is lower, only be 5-7%, and the interfacial agent consumption of reported in literature organophosphorus pesticide water emulsion is higher in the past, general consumption is all greater than 20%, the highest reaches 50%, it directly affects economic benefit, increases cost, so can not drop into batch production.
3, organophosphorus pesticide water emulsion of the present invention uses phosphorous-containing surfactants to be stabilizing agent, and it can reduce the consumption of emulsifying agent, further to reduce cost.
4, organophosphorus pesticide water emulsion of the present invention uses urea to be antifreezing agent, and it originates sufficient, low price, and have the fertilizer efficiency effect. This preparation did not freeze at-10 ℃ in 24 hours. Can increase preparation proportion, increase aerial sinking speed, reduce drift, be suitable for aircraft and spray.
5, organophosphorus pesticide water emulsion of the present invention, can not need thin up, directly spray stoste, be used for aircraft or ground ulv spraying, dosage 50-400 g/acre, effectively dose 10-50 g/acre, use the hand spray facility to carry out conventional spray, dosage 50-100 kg/acre than ground, work efficiency can improve 100 times, and reported in literature organophosphorus pesticide water emulsion does not in the past all have and directly sprays stoste, for the using method of aircraft or ground ulv spraying.
Claims (5)
1, a kind of sumithion aqueous emulsion is characterized in that forming (percentage by weight) by following material: sumithion 30-60; Emulsifier is one of alkylaryl polyoxyethylene poly-oxygen propylene aether or alkylaryl formaldehyde resin APEO 5-7; Stabilizing agent is hydroquinones or expoxy propane phenyl ether or pH6.6 buffer solution or tributyl phosphate or one of epoxychloropropane or alkylphenol polyoxyethylene phosphate 1-3; Antifreezing agent is ethylene glycol or polyethylene glycol or one of glycerine or urea 5-8; Surplus is a water.
2, a kind of malathion aqueous emulsion is characterized in that forming (percentage by weight) by following material: malathion 30-60; Emulsifier is one of alkylaryl polyoxyethylene poly-oxygen propylene aether or alkylaryl formaldehyde resin APEO 5-7; Stabilizing agent is hydroquinones or expoxy propane phenyl ether or pH6.6 buffer solution or tributyl phosphate or one of epoxychloropropane or alkylphenol polyoxyethylene phosphate 1-3; Antifreezing agent is ethylene glycol or polyethylene glycol or one of glycerine or urea 5-8; Surplus is a water.
3, a kind of Isofenphos methyl aqueous emulsion is characterized in that forming (percentage by weight) by following material: Isofenphos methyl 30-60; Emulsifier is one of alkylaryl polyoxyethylene poly-oxygen propylene aether or alkylaryl formaldehyde resin APEO 5-7; Stabilizing agent is hydroquinones or expoxy propane phenyl ether or pH6.6 buffer solution or tributyl phosphate or one of epoxychloropropane or alkylphenol polyoxyethylene phosphate 1-3; Antifreezing agent is ethylene glycol or polyethylene glycol or one of glycerine or urea 5-8; Surplus is a water.
4, a kind of phenthoate dimephenthoate cidial aqueous emulsion is characterized in that forming (percentage by weight) by following material: phenthoate dimephenthoate cidial 30-60; Emulsifier is one of alkylaryl polyoxyethylene poly-oxygen propylene aether or alkylaryl formaldehyde resin APEO 5-7; Stabilizing agent is hydroquinones or expoxy propane phenyl ether or pH6.6 buffer solution or tributyl phosphate or one of epoxychloropropane or alkylphenol polyoxyethylene phosphate 1-3; Antifreezing agent is ethylene glycol or polyethylene glycol or one of glycerine or urea 5-8; Surplus is a water.
5, a kind of parathion-methyl aqueous emulsion is characterized in that forming (percentage by weight) by following material: Isofenphos methyl 30-60; Emulsifier is one of alkylaryl polyoxyethylene poly-oxygen propylene aether or alkylaryl formaldehyde resin APEO 5-7; Stabilizing agent is hydroquinones or expoxy propane phenyl ether or pH6.6 buffer solution or tributyl phosphate or one of epoxychloropropane or alkylphenol polyoxyethylene phosphate 1-3; Antifreezing agent is ethylene glycol or polyethylene glycol or one of glycerine or urea 5-8; Surplus is a water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103386 CN1033419C (en) | 1991-05-30 | 1991-05-30 | Formulation of organophosphorus pesticide water emulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103386 CN1033419C (en) | 1991-05-30 | 1991-05-30 | Formulation of organophosphorus pesticide water emulsion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055280A CN1055280A (en) | 1991-10-16 |
| CN1033419C true CN1033419C (en) | 1996-12-04 |
Family
ID=4906078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103386 Expired - Fee Related CN1033419C (en) | 1991-05-30 | 1991-05-30 | Formulation of organophosphorus pesticide water emulsion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033419C (en) |
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| JP5032695B1 (en) * | 2011-09-22 | 2012-09-26 | 大伍貿易株式会社 | Water vapor pressure reducing agent |
| US9913472B2 (en) * | 2014-06-24 | 2018-03-13 | Rotam Agrochem International Company Limited | Agrochemical formulation, method making, and method of using |
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| CN107950563A (en) * | 2017-10-26 | 2018-04-24 | 江苏腾龙生物药业有限公司 | A kind of phenthoate dimephenthoate cidial aqueous emulsion and its preparation process |
| CN109042635B (en) * | 2018-09-14 | 2021-04-20 | 柳州市万友家庭卫生害虫防治所 | Fenthion aqueous emulsion and preparation method and application thereof |
-
1991
- 1991-05-30 CN CN 91103386 patent/CN1033419C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055280A (en) | 1991-10-16 |
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