CN101185442A - Compound pesticides water emulsion agent containing fipronil and triazophos and preparation method thereof - Google Patents
Compound pesticides water emulsion agent containing fipronil and triazophos and preparation method thereof Download PDFInfo
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- CN101185442A CN101185442A CNA2006101457611A CN200610145761A CN101185442A CN 101185442 A CN101185442 A CN 101185442A CN A2006101457611 A CNA2006101457611 A CN A2006101457611A CN 200610145761 A CN200610145761 A CN 200610145761A CN 101185442 A CN101185442 A CN 101185442A
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Abstract
The invention discloses a compound disinsection water emulsion which contains fipronil and triazophos and a preparation method thereof. The water emulsion comprises 0.5-3 percent of the fipronil, 20-40 percent of the triazophos, 5-12 percent of emulsifier, 0-3 percent of stabilizer, 2-10 percent of cosolvent, 0-5 percent of antifreeze, 0-3.0 percent of thickener and the rest is dispersion medium water, which are dispersed evenly by a high-speed cutting and mixing emulsifier or are homogenized by a high-pressure homogenizer, thus obtaining the invention. The invention does not have insecticide resistance, has high efficacy and special effects on preventing rice stem borers, yellow rice borers, pink rice borers, rice leaf rollers, plutellid moths and diamondback moths; the invention also can control leafhoppers, plant hoppers, flies and coleopteran pests at the same time. The invention adopts the water as the dispersion medium and has the advantages that the invention does not pollute the environment, has no crystallization phenomena after two-year storage and has long shelf life; besides, the invention is not inflammable, can be safely stored and transported and has simple production technique; compared with using the fipronil independently, the cost of the invention can be reduced greatly.
Description
Technical field:
The present invention relates to a kind of agricultural chemical insecticide, compound insecticidal aqueous emulsion of particularly a kind of fluorine-containing worm nitrile and Hostathion and preparation method thereof.
Background technology:
The Hostathion of determining to replace one of 10 emphasis kinds of 5 kinds of high-toxic pesticides such as acephatemet, nuvacron, parathion-methyl, parathion, flolimat as the National Development and Reform Commission and the Ministry of Agriculture is broad spectrum insecticide, miticide, also has nematocidal effect, can be used for preventing and treating lepidoptera pest and aphid on fruit tree, vegetables, the cereal crop, have huge market prospects, Hostathion has become one of govern-house-variety of China control snout moth's larva of rice at present.According to statistics, by domesticly having 547 and contain Hostathion insecticide registration in September, 2006, wherein the missible oil product has 522, accounts for 95.4%, and cream preparation has accounted for very big part, the aromatic hydrocarbon solvent consumption is very big, and preparation is prone to crystalline polamer, and shelf life is short, has had a strong impact on the quality of product, returning goods also happens occasionally, and manufacturer is caused great loss.
The same with Hostathion, also be the fluorine worm nitrile of one of Ministry of Agriculture's candidate's kind that substitutes 5 kinds of high-toxic pesticides of recommending, to tag and stomach toxicity, stronger systemic action is arranged in paddy rice, knock down active for medium.Can be used for preventing and treating the snout moth's larva of rice, plant hopper, thrips, rice beetle, diamond-back moth etc., aphid, leafhopper, Lepidoptera, larva, fly class and coleoptera are all had very high insecticidal activity in interior a series of important pests.The insect that cyclopentadiene, chrysanthemum ester class or carbamate insecticide has been produced resistance is all responsive to fluorine worm nitrile.But fluorine worm nitrile use cost is higher.
Organic solvent in the emulsifiable concentrates for agricultural chemicals has pollution to environment, and operator is had harm, and is disabled at some national aromatic hydrocarbon solvents; The use aromatic hydrocarbon solvent also is restricted in China's missible oil, in Ministry of Agriculture's actual enrollment operation, intends the registration if use benzene class aromatic solvent will be under an embargo in the registration missible oil product at present.These all impel the formulations of pesticide to bring in constant renewal in and development, and wherein Water-borne modification is exactly one of dominant direction of formulations of pesticide development.Aqueous emulsion then is one of main formulation kind in the Water-borne modification formulation.
Aqueous emulsion be one or more non-water-soluble liquids with liquid pearl form by the even action of surfactant and mechanical force be dispersed in the water, constitute heterogeneous dispersion with quite stable.Aqueous emulsion only uses on a small quantity or does not even use organic solvent, and water replaces, and organic solvent is a kind of water base property preparation as medium in the missible oil.Therefore it is more safer than missible oil, and nonirritant and very little to people's dermal toxicity during use is a kind of good environmental protection type agricultural chemical novel form that replaces missible oil.
Aqueous emulsion and microemulsion all are with the environmental protection type agricultural chemical formulation of water as dispersion medium.Its maximum is not both aqueous emulsion and belongs on the dynamics stable but unsettled dispersion on the thermodynamics, and microemulsion belongs to dispersion stable on the thermodynamics; The aqueous emulsion liquid-drop diameter is at 0.1～10 μ m, and the preparation outward appearance is milky white shape; The microemulsion droplets diameter is at 0.01～0.1 μ m, and the preparation outward appearance is translucent or transparence.
There is following technology of preparing difficult point in the Firponil compounded disinsection aqueous emulsion of Hostathion: microemulsion is a thermodynamic stable system, can spontaneous formation.But the aqueous pesticide preparation of the outward appearance homogeneous that aqueous emulsion forms for the agricultural chemicals oil droplet suspends in water is a thermodynamic unstable system.Under action of gravity, the oil droplet of suspension can sink gradually, in addition because of there being model ylid bloom action power between the oil droplet, easily attracting each other and agglomeration takes place and further quickens sedimentation, produces and piles up.When piling up gently, it is denseer thick that the preparation outward appearance is the bottom, up weakens gradually; Then occur flocculation when crossing closs packing, even produce precipitation or breakdown of emulsion (analysing oil) phenomenon, cause and to disperse to form the homogeneous system again.Therefore the appearance stability that solves preparation is one of technological difficulties of development Hostathion fluorine worm nitrile aqueous emulsion.And Hostathion, fluorine worm nitrile all have in various degree hydrolysis, especially Hostathion in water, meets water and more easily decompose.Therefore when exploitation Hostathion fluorine worm nitrile aqueous emulsion, chemical stability has become another technological difficulties.
Summary of the invention:
The objective of the invention is to solve above-mentioned technical problem, a kind of pollution that can reduce aromatic hydrocarbon organic solvent to environment is provided, thereby avoid triazophos emulsifiable solution or the crystallization of fluorine worm nitrile triazophos emulsifiable solution to improve the product shelf life, and solve the pesticide resistance problem of insect to triazophos emulsifiable solution, reduce the independent fluorine-containing worm nitrile of fluorine worm nitrile cost problem of higher and the compound insecticidal aqueous emulsion of Hostathion of using simultaneously
Another object of the present invention is to overcome aqueous emulsion technology of preparing difficult point, and the preparation method of the compound insecticidal aqueous emulsion of a kind of described fluorine-containing worm nitrile and Hostathion is provided.
Above-mentioned purpose of the present invention is to realize by following technological means.
The compound insecticidal aqueous emulsion of fluorine-containing worm nitrile provided by the present invention and Hostathion comprises following component by weight percentage:
Fluorine worm nitrile 0.5-3%
Hostathion 20-40%.
The content of preferred described by weight percentage fluorine worm nitrile is 1-2%, and the content of Hostathion is 25-35%.
Wherein also comprise following component by weight percentage:
Emulsifier 5-12%
Stabilizing agent 0-3%
Cosolvent 2-10%
Antifreezing agent 0-5%
Thickener 0-3%
Water surplus.
Wherein said emulsifier is selected from polyoxyethylene nonylphenol ether, alkylphenol polyoxyethylene, fat alcohol ethoxyl compound, styryl phenyl APEO, alkyl phenol formaldehyde resin polyoxyethylene ether, styrene phenol formaldehyde resin APEO, the polyoxyethylene polyoxypropylene block co-polyether, the secondary octyl phenol polyethenoxy ether, castor oil polyoxyethylene ether, fat alcohol alkoxy compound, tallow ethyoxyl amine salt, starch Sodium Octenyl Succinate, polyoxyethylene ether phosphate salt, alkyl phosphorus phosphate ester salt or naphthalene sulfonate salt.
Wherein said stabilizing agent is selected from epoxidized soybean oil, epoxychloropropane, triphenyl phosphite, glycidol ether or pentaerythrite.
Wherein said cosolvent is selected from n-butanol, isobutanol, n-octyl alcohol, DAA, cyclohexanone, N, dinethylformamide or N,N-dimethylacetamide.
Wherein said antifreezing agent is selected from ethylene glycol, PEG400, propane diols, glycerine, isopropyl alcohol, and described thickener is selected from xanthans, Magnesiumaluminumsilicate, sodium carboxymethylcellulose or organobentonite.
Wherein said water is deionized water or distilled water.
The preparation method of the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile provided by the present invention and Hostathion, it adopts following processing step:
A. take by weighing raw material according to aforementioned proportioning;
B. water, antifreezing agent, thickener are mixed, obtain water;
C. fluorine worm nitrile, Hostathion, cosolvent, emulsifier and stabilizing agent are mixed and obtain oil phase;
D. water is mixed with oil phase, regulate the pH value and make 4≤pH≤7, obtain the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile and Hostathion.
Wherein water and oil phase are to mix the compound insecticidal aqueous emulsion that obtains fluorine-containing worm nitrile and Hostathion under the high speed shear condition in the steps d.
Perhaps water and oil phase mix under mechanical agitation and obtain thick emulsion in the steps d, with high pressure homogenizer thick emulsion homogeneous are obtained the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile and Hostathion then.
Fluorine-containing worm nitrile provided by the present invention and Triazoxide as built-up disinsection aqueous emulsion preparation method, in preparation process, products obtained therefrom meta-acid can occur or inclined to one side alkali exceeds the situation of setting the pH value scope, regulate the final pH value of product by adding acidity such as acetate, formic acid, hydrochloric acid, sulfuric acid, benzoic acid, citric acid, ethylenediamine, triethylamine or alkaline matter, make it reach the scope of setting.
Fluorine-containing worm nitrile provided by the present invention and Triazoxide as built-up disinsection aqueous emulsion outward appearance homogeneous; Easy mobility; Stability of emulsion is qualified; Cold and hot storage physical stability is qualified; In heat two weeks of storage under 54 ± 1 ℃ condition, fluorine worm nitrile and Hostathion resolution ratio are all less than 5%, and storage back preparation stability of emulsion is qualified.
The Firponil compounded disinsection aqueous emulsion of Hostathion provided by the present invention is compared major advantage and is with triazophos emulsifiable solution, fluorine worm nitrile Triazoxide as built-up insecticidal emulsifiable concentrate, the fluorine worm nitrile Triazoxide as built-up pest killing micro emulsion of same specification:
(1) abandons whole benzene class aromatic hydrocarbons organic solvents, saved workload and relevant expenses such as the purchasing of benzene class aromatic solvent, transportation, avoid the generation of inflammable and explosive problem to reduce the fire safety burden;
(2) use water to replace organic solvent as medium, reduce environmental pollution, the conservation cost can be avoided the influence of international petroleum market price simultaneously again;
(3) solvent-free smell to the eye nonirritant, significantly is lower than missible oil to people's dermal toxicity;
(4) safe to the environment beneficial organism in missible oil;
(5) make and safety when using;
(6) low processing cost;
(7) packing of product, storage and freight are low;
(8) solved the easy decomposition and crystallization of triazophos emulsifiable solution preparation, physical and chemical stability is poor, shelf life is short defective preferably, 2 years no crystalline polamers of storage at normal temperature have remarkable economic efficiency;
(9) no pesticide resistance, the drug effect height, to the control rice-stem borer, paddy stem borer, pink rice borer, rice leaf roller, diamond-back moth, diamond-back moth has special efficacy, simultaneously can doublely control leafhopper, plant hopper, fly class and coleopteran pest, lepidoptera pest on the cereal class develops immunity to drugs to Hostathion, some areas have reached high anti-level, with Firponil compounded after can solve the pesticide resistance problem well, in addition, fluorine worm nitrile and Triazoxide as built-up use, not two medicine simple superposition, but collaborative playing a role because of its synergistic effect improves drug effect greatly, also can be reduced the cost of independent use fluorine worm nitrile.
The present invention is the technological difficulties that solve aforementioned aqueous emulsion preparation by following approach:
1. adopt the surfactant that strong adsorption capacity is arranged on agricultural chemicals oil droplet surface,, form more stable sterically hindered effect, prevent coalescent on the oil droplet surface as the polyoxyethylene polyoxypropylene block co-polyether etc.;
2. it is composite to select suitable surfactant to carry out, and makes composite emulsifier form the higher compound interface film of mechanical strength on agricultural chemicals oil droplet surface, and interfacial film intensity is high more, is difficult for taking place coalescent increase when oil droplet collides mutually, and system is just more stable;
3. select the suitable anion auxiliary agent,, strengthen the Zeta potential gesture, make electrostatic repulsion forces enhancing between oil droplet, be difficult for taking place coalescent as tallow ethyoxyl amine salt, phosphates, naphthalene sulfonate salt etc.;
4. select suitable process route and technological parameter, make oil droplet or the particle grain size distribution scope is narrower, meso-position radius is less (1～5 μ m), slow down settling velocity, and significantly alleviate the Ostwald ripening phenomenon;
5. keeping under preparation good mobility and the dispersed situation, utilize thickener regulation system viscosity such as xanthans, Magnesiumaluminumsilicate, sodium carboxymethylcellulose, organobentonite, form tridimensional network, support disperse phase (Hostathion, fluorine worm nitrile) quality, and then delayed fallout, prevent generation precipitation or demulsifying phenomenon in the shelf life phase;
6. solved the problem of the Firponil compounded aqueous emulsion of Hostathion by adjusting preparation PH scope, the suitable chemical stabilizer (as epoxychloropropane) of interpolation, improved the chemical stability of composite aqueous emulsion greatly owing to Hostathion, the hydrolysis in water of fluorine worm nitrile.
Embodiment:
Describe compound insecticidal aqueous emulsion of fluorine-containing worm nitrile provided by the present invention and Hostathion and preparation method thereof in detail below in conjunction with specific embodiment and test example; described embodiment and test example are in order to explain the present invention better, rather than to the restriction of claim protection domain of the present invention.For those skilled in the art speech, edition with parallel text description, any change of theme of the present invention, modification, distortion or other are used and use, all will be conspicuous.All these changes inseparable with essence of the present invention and scope, modification, distortion or other use and use, and all are regarded as falling within the scope of the present invention.
In the following example, we add acidity such as acetate, formic acid, hydrochloric acid, sulfuric acid, benzoic acid, citric acid, ethylenediamine, triethylamine or alkaline matter and regulate the final pH value of product and reach setting range.
Preparation embodiment:
Example 1
With fluorine worm nitrile 0.5%, Hostathion 20.0%, N, dinethylformamide 0.5%, cyclohexanone 1.5%, epoxidized soybean oil 3.0%, polyoxyethylene nonylphenol ether 1.0%, polyoxyethylene polyoxypropylene block co-polyether 3.0%, tallow ethyoxyl amine salt 1.0% are put in the stirred tank, after stirring, promptly get the oil phase of transparent and homogeneous, oil phase is pumped into high-shear emulsion machine.Input sodium carboxymethylcellulose 3.0%, PEG400 5.0%, distilled water are mended to 100% in another stirred tank, promptly get the homogeneous water after mixing, and water is squeezed into head tank.Under the high speed shear condition, water is added drop-wise in the oil phase, finish to transfer pH value to 4 and continue and sheared 10-30 minute, get final product 20.5% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Example 2
With fluorine worm nitrile 1.0%, Hostathion 25.0%, N, N-dimethylacetylamide 1.0%, DAA 1.0%, cyclohexanone 2.0%, epoxychloropropane 2.0%, glycidol ether 0.5%, alkylphenol polyoxyethylene 2.0%, polyoxyethylene polyoxypropylene block co-polyether 4.0% are put in the stirred tank, after stirring, promptly get the oil phase of transparent and homogeneous, oil phase is squeezed into head tank.Input naphthalene sulfonate salt 1.0%, Magnesiumaluminumsilicate 2.5%, polyethylene glycol 4.0%, distilled water are mended to 100% in another stirred tank, promptly get the homogeneous water after mixing, and water is pumped into high-shear emulsion machine.Under the high speed shear condition, oil phase is slowly joined aqueous phase, finish to transfer pH value to 4.5 and continue and sheared 10-30 minute, get final product 26% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Example 3
With fluorine worm nitrile 1.0%, Hostathion 30.0%, N, dinethylformamide 0.5%, n-butanol 0.5%, DAA 2.0%, cyclohexanone 2.0%, triphenyl phosphite 1.5%, pentaerythrite 0.5%, fat alcohol ethoxyl compound 2.0%, polyoxyethylene polyoxypropylene block co-polyether 3.0%,, polyoxyethylene ether phosphate salt 1.0%, alkyl phenol formaldehyde resin polyoxyethylene ether 2.0% put in the stirred tank, after stirring, promptly get the oil phase of transparent and homogeneous, oil phase is squeezed into head tank.Input organobentonite 1.0%, xanthans 0.05%, propane diols 3.0%, distilled water are mended to 100% in another stirred tank, promptly get the homogeneous water after mixing.Under the mechanical agitation condition, the oil phase in the head tank is slowly joined aqueous phase, finish the back and continue to stir 10-20 minute, obtain thick emulsion; With high pressure homogenizer with thick emulsion homogeneous one time, again mechanical agitation condition downward modulation pH value to 5.0 get final product 31% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Example 4
Fluorine worm nitrile 1.5%, Hostathion 30.0%, DAA 7.0%, epoxidized soybean oil 2.0%, styrene phenol formaldehyde resin APEO 1.0%, polyoxyethylene polyoxypropylene block co-polyether 4.5%, secondary octyl phenol polyethenoxy ether 1.5%, styryl phenyl APEO 2.0% are put in the stirred tank, after stirring, promptly get the oil phase of transparent and homogeneous, oil phase is squeezed into head tank.Input xanthans 0.05%, Magnesiumaluminumsilicate 1.5%, glycerine 3.0%, distilled water are mended to 100% in another stirred tank, promptly get the transparent and homogeneous water after mixing, and water is pumped into high-shear emulsion machine.Under the high speed shear condition, oil phase is slowly joined aqueous phase, finish to transfer pH value to 5.5 and continue and sheared 10-30 minute, get final product 31.5% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Example 5
With fluorine worm nitrile 2.0%, Hostathion 35.0%, N, dinethylformamide 1.0%, isobutanol 1.0%, DAA 4.0%, cyclohexanone 4.0%, epoxychloropropane 1.0%, fat alcohol ethoxyl compound 3.5%, polyoxyethylene nonylphenol ether 3.0%, alkyl phosphate salt 1.5% are put in the stirred tank, promptly get the oil phase of transparent and homogeneous after stirring.Input starch Sodium Octenyl Succinate 2.0%, xanthans 0.1%, isopropyl alcohol 2.0%, distilled water are mended to 100% in another stirred tank, promptly get the homogeneous water after mixing, and water is squeezed into head tank.Under the mechanical agitation condition, the water in the head tank is slowly joined in the oil phase, finish the back and continue to stir 10-20 minute, obtain thick emulsion; With high pressure homogenizer with thick emulsion homogeneous one time, again mechanical agitation condition downward modulation pH value to 6.0 get final product 37% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Example 6
With fluorine worm nitrile 3.0%, Hostathion 40.0%, DAA 5.0%, N, dinethylformamide 2.0%, cyclohexanone 2.0%, n-octyl alcohol 1.0%, styrene phenol formaldehyde resin APEO 1.5%, polyoxyethylene polyoxypropylene block co-polyether 4.5%, castor oil polyoxyethylene ether 2.5%, fat alcohol alkoxy compound 2.0%, tallow ethyoxyl amine salt 1.5% are put in the stirred tank, after stirring, promptly get the oil phase of transparent and homogeneous, oil phase is pumped into high-shear emulsion machine; Deionized water is squeezed into head tank, under the high speed shear condition, deionized water is slowly joined in the oil phase, mend to 100%.Finish the back and transfer pH value to 7.0 and continue and sheared 10-30 minute, get final product 43% fluorine-containing worm nitrile and Hostathion disinsection aqueous emulsion.
Test of pesticide effectiveness example:
It is described that the fluorine-containing worm nitrile of variable concentrations described in the following test example and the component of Triazoxide as built-up disinsection aqueous emulsion are made each embodiment as described above.
Through indoor bioassay, fluorine-containing worm nitrile provided by the present invention and Triazoxide as built-up disinsection aqueous emulsion have good synergistic effect to insect.
Test serves as the examination worm with striped rice borer (Chilo supperssalis (Walker)) 3 instar larvaes (indoors artificial raising), and biological activity determination adopts infusion process.Contrast medicament 20% triazophos emulsifiable solution (EC), 5% fluorine worm nitrile suspending agent (SC), each medicament is diluted to 6 concentration for examination with running water with the geometric ratio form.Get third-instar larvae and flood after 5 seconds to take out in reagent agent and put into the culture dish that is placed with fresh rice straw, each concentration repeats 3 times, each 20.28 ℃ of cultivation temperature, relative moisture 90%.Handle check result after 24 hours.Check result is utilized the DPS of statistical software platform, adopts dosage logarithm one dead probit value curve method to calculate and tries to achieve corresponding LC
50Value, (Co-toxicity coefficient is CTC) to judge fluorine-containing worm nitrile and Triazoxide as built-up disinsection aqueous emulsion synergy situation (seeing Table 1) to calculate co-toxicity coefficient with Sun Yunpei (Yun-peiSun) method again.
Fluorine-containing worm nitrile of table 1 and Triazoxide as built-up disinsection aqueous emulsion are to the synergistic effect of striped rice borer
As can be seen from the above table, fluorine worm nitrile and Hostathion can be worked in coordination with well and be played a role, and co-toxicity coefficient is all greater than 150, and synergistic effect is remarkable.
Field control effectiveness test result of the present invention is as follows:
Through the Long Youxian of Zhejiang Province, Hangzhou Xiaoshan City, changde, hunan province city three ground plant protection units three land for growing field crops comparative efficacy tests of 31% fluorine-containing worm nitrile and Triazoxide as built-up disinsection aqueous emulsion and 5% fluorine worm nitrile SC, 20% triazophos emulsifiable solution, 15% triazophos micro-emulsion are found, the drug effect of fluorine-containing worm nitrile and Triazoxide as built-up disinsection aqueous emulsion is apparently higher than the drug effect of 20% triazophos emulsifiable solution, 15% triazophos micro-emulsion, and is not less than 5% fluorine worm nitrile suspending agent.See following table (EW represents aqueous emulsion in the table, and SC represents suspending agent, and on behalf of missible oil, ME, EC represent microemulsion, 31% Hostathion fluorine worm nitrile EW to abbreviate 31% trifluoro EW as) for details.Fluorine-containing worm nitrile of table 2.31% and Triazoxide as built-up disinsection aqueous emulsion to two generation rice leaf roller drug effect
Zhejiang dragon trip, 2004.7
Fluorine-containing worm nitrile of table 3.31% and Triazoxide as built-up disinsection aqueous emulsion are to the drug effect of three generations rice leaf roller
Xiaoshan, Zhejiang, 2004.7
Fluorine-containing worm nitrile of table 4.31% and Triazoxide as built-up disinsection aqueous emulsion to four generation rice leaf roller drug effect
Changde, hunan, 2004.9
The check experiment example:
The Firponil compounded disinsection aqueous emulsion of Hostathion is compared major advantage with the Firponil compounded desinsection breast of Hostathion microemulsion:
(1) consumption of water is obviously high in the preparation, and consumption of organic solvent is obviously low, and dosage of surfactant is obvious low, and the overall auxiliary agent cost except that former medicine is obviously low.
With content is composite dose of aqueous emulsion of 31% Hostathion fipronil insecticidal and composite dose of microemulsion of 31% Hostathion fipronil insecticidal of suitability for industrialized production is the relatively auxiliary agent cost of aqueous emulsion and microemulsion of example, sees Table 1.As shown in Table 5, the auxiliary agent cost of 31% Hostathion fluorine worm nitrile aqueous emulsion is 0.2819 ten thousand yuan/ton, is about 60.4% of 31% Hostathion fluorine worm nitrile microemulsion, and the auxiliary agent cost reduces by 39.6%; Be about 37.8% of 31% Hostathion fluorine worm nitrile missible oil, the auxiliary agent cost reduces by 62.2%.
Composite dose three kinds formulation auxiliary agent cost contrasts of table 5 31% Hostathion fipronil insecticidal
Annotate: each auxiliary agent price is with reference to market price on September 12nd, 2006, and wherein the dimethylbenzene price is reported minimum producer price to be as the criterion with " Alibaba " chemical industry information.
(2) safe to the environment beneficial organism in microemulsion.
Entrust Zhejiang University's agricultural chemicals and environment toxicological study tested content by national relevant regulations and be 31% (Hostathion: Hostathion fluorine worm nitrile aqueous emulsion fluorine worm nitrile=30: 1) and Hostathion fluorine worm nitrile microemulsion the results are shown in Table 6 to the acute toxicity of environmental organism honeybee, bird, fish, silkworm.Test shows that Hostathion fluorine worm nitrile aqueous emulsion will be lower than Hostathion fluorine worm nitrile microemulsion to the acute toxicity of environmental organism, and promptly the former will be higher than the latter to the safety of environmental organism.
Composite dose of two kinds of formulations of table 6 Hostathion and fipronil insecticidal are to the acute toxicity contrast of environmental organism
(3) dermal toxicity to the people will be lower than microemulsion.
The micella particle diameter of microemulsion is about 0.01～0.1 μ m, easily infiltrates skin; The particle diameter of aqueous emulsion is generally at 0.1～10 μ m, much larger than the particle diameter of microemulsion, to the also too late microemulsion of the permeability of application on human skin.Just because of this characteristic, very fast in the development of cosmetic field microemulsion cosmetics, giving emulsion is that main traditional cosmetic industry has brought a change.But concerning pesticidal preparations, this characteristic of microemulsion makes microemulsion will be higher than pesticide emulsion in water to people's dermal toxicity.
Claims (10)
1. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile and Hostathion is characterized in that comprising by weight percentage following component:
Fluorine worm nitrile 0.5-3%
Hostathion 20-40%.
2. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 1 and Hostathion is characterized in that: the content of described by weight percentage fluorine worm nitrile is 1-2%, and the content of Hostathion is 25-35%.
3. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 1 and 2 and Hostathion is characterized in that also comprising by weight percentage following component:
Emulsifier 5-12%
Stabilizing agent 0-3%
Cosolvent 2-10%
Antifreezing agent 0-5%
Thickener 0-3%
Water surplus.
4. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 3 and Hostathion, it is characterized in that: described emulsifier is selected from polyoxyethylene nonylphenol ether, alkylphenol polyoxyethylene, fat alcohol ethoxyl compound, styryl phenyl APEO, alkyl phenol formaldehyde resin polyoxyethylene ether, styrene phenol formaldehyde resin APEO, the polyoxyethylene polyoxypropylene block co-polyether, the secondary octyl phenol polyethenoxy ether, castor oil polyoxyethylene ether, fat alcohol alkoxy compound, tallow ethyoxyl amine salt, starch Sodium Octenyl Succinate, polyoxyethylene ether phosphate salt, alkyl phosphorus phosphate ester salt or naphthalene sulfonate salt.
5. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 3 and Hostathion, it is characterized in that: described stabilizing agent is selected from epoxidized soybean oil, epoxychloropropane, triphenyl phosphite, glycidol ether or pentaerythrite, described cosolvent is selected from n-butanol, isobutanol, n-octyl alcohol, DAA, cyclohexanone, N, dinethylformamide or N,N-dimethylacetamide.
6. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 3 and Hostathion, it is characterized in that: described antifreezing agent is selected from ethylene glycol, PEG400, propane diols, glycerine, isopropyl alcohol, and described thickener is selected from xanthans, Magnesiumaluminumsilicate, sodium carboxymethylcellulose or organobentonite.
7. the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile according to claim 3 and Hostathion is characterized in that: described water is deionized water or distilled water.
8. the preparation method of the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile as claimed in claim 1 and Hostathion is characterized in that adopting following processing step:
A. the part by weight according to fluorine worm nitrile 0.5%-3%, Hostathion 20-40%, emulsifier 5-12%, stabilizing agent 0-3%, cosolvent 2-10%, antifreezing agent 0-5%, thickener 0-3% and water surplus takes by weighing raw material;
B. water, antifreezing agent, thickener are mixed, obtain water;
C. fluorine worm nitrile, Hostathion, cosolvent, emulsifier and stabilizing agent are mixed and obtain oil phase;
D. water is mixed with oil phase, regulate the pH value and make 4≤pH≤7, obtain the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile and Hostathion.
9. the preparation method of the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile as claimed in claim 1 and Hostathion is characterized in that: water and oil phase are to mix the compound insecticidal aqueous emulsion that obtains fluorine-containing worm nitrile and Hostathion under the high speed shear condition in the steps d.
10. the preparation method of the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile as claimed in claim 1 and Hostathion, it is characterized in that: water and oil phase mix under mechanical agitation and obtain thick emulsion in the steps d, with high pressure homogenizer thick emulsion homogeneous are obtained the compound insecticidal aqueous emulsion of fluorine-containing worm nitrile and Hostathion then.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363059B (en) * | 2008-09-24 | 2011-04-06 | 南京农业大学 | Molecule detection method for triazophos target resistance of rice borer |
| CN103081894A (en) * | 2013-01-25 | 2013-05-08 | 江苏省苏科农化有限责任公司 | Novel preparation method of pesticide emulsion in water |
-
2006
- 2006-11-16 CN CNA2006101457611A patent/CN101185442A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363059B (en) * | 2008-09-24 | 2011-04-06 | 南京农业大学 | Molecule detection method for triazophos target resistance of rice borer |
| CN103081894A (en) * | 2013-01-25 | 2013-05-08 | 江苏省苏科农化有限责任公司 | Novel preparation method of pesticide emulsion in water |
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