CN101642099B - Pesticide suspension concentrate with organosilicon surfactant and preparation method thereof - Google Patents
Pesticide suspension concentrate with organosilicon surfactant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a pesticide suspension concentrate with organosilicon surfactant and a preparation method thereof. The preparation method comprises the following steps: mixing one or more of pesticide active ingredients evenly, and adding wetting dispersant, organosilicon surfactant, thickener, stabilizer, defoaming agent, antifreezing agent, thixotropic agent, PH conditioning agent and other auxiliary components and deionized water in a ball mill to obtain the suspension concentrate. The pesticide preparation of the invention has low surface tension, good wettability on the surface of targets, strong permeability and good drug effect and can evidently improve the utilization ratio of pesticides.
Description
Technical field:
The present invention relates to pesticide field, more specifically relate to the method for using of a kind of novel agrochemical auxiliary agent in agricultural chemicals suspension agent and the preparation method of this suspension formulation.
Background technology:
Using the pesticide control disease pest and weed is to guarantee the indispensable means of agricultural product good quality and high output.The modern formulations of pesticide are to water baseization, ultramicronising, no dust and sustained release development, and wherein water baseization is exactly one of main direction of agricultural chemicals development.Water can reduce the consumption of organic solvent as the agricultural chemicals suspension agent of carrier, the dust pollution that does not have wettable powder and pulvis to bring again, and reduced the pesticide producing cost, become a kind of very important formulation in the pesticidal preparations.Agricultural chemicals will be brought into play high service efficiency, at first will have more pesticide solution on target substance, to sprawl and be detained.This just requires soup to have lower surface tension, has good wetability and permeability on the target surface.Otherwise will cause fluid loss, will inevitably influence drug effect like this, directly environment caused serious pollution.Simultaneously, because drug effect is not high, the peasant will inevitably strengthen dispenser dynamics and intensity, has both caused the increase of agricultural chemicals use cost, has also caused the severe overweight of residue of pesticide.Therefore, improving the agricultural chemicals availability is to reduce drug cost, reduces environmental pollution, reduces the basic of residue of pesticide.
Compare with conventional surfactant, organic silicon surfactant has the infiltration capacity that good wetability, stronger adhesion, superpower extended capability are become reconciled.Owing to have lower surface tension, its pore permeability is high, has good anti-rain erosion.As a kind of novel, insecticides adjuvant efficiently, it has broad application prospects in pesticide industry.
Therefore, in the present invention novel surfactant-organic silicon surfactant is joined in the agricultural-chemical suspension preparation, made a kind of physical stability, chemical stability, all good agricultural chemicals suspension agents of preparation effect property.
Technology contents:
The objective of the invention is to propose a kind of agricultural chemicals suspension agent that contains organic silicon surfactant and preparation method thereof.
Agricultural chemicals suspension agent of the present invention is made up of pesticidal active substance, organic silicon surfactant, auxiliary element and water.
Pesticidal active substance wherein is for being selected from insecticide fluorine worm nitrile, chlopyrifos, AVM, Affirm (Merck Co.), emamectin-benzoate, worm hydrazides, Imidacloprid, butyl ether urea; Bactericide is selected from propiconazole, Difenoconazole, jinggangmeisu, thiophanate-methyl, carbendazim, tmtd, phonetic mould amine, bacillus thuringiensis,Bt; Herbicide nicosulfuron, Quizalotop-ethyl, efficient haloxyfop-methyl spirit, atrazine; Miticide four mite piperazines, azacyclotin; In the gibberellin of plant growth regulator one or more.
Organic silicon surfactant wherein can be to well known to a person skilled in the art those.Preferably has T type structure, by all being the skeleton that siloxanes forms that methylates, with the trisiloxanes of one or more polyethers tail.The more preferably Silwet408, Silwet625, Silwet618 and the Silwet806 that produce of GE company, the Boost that Doro Elaneo company produces, or the Sylgard309 that produces of DocoCorning company etc.Concrete general structure does
Agricultural chemicals suspension agent of the present invention also contains auxiliary element.Described auxiliary element is wetting dispersing agent, antifoaming agent, antifreezing agent, thickener, pH regulator agent and stabilizing agent.Wherein wetting dispersing agent can be to be selected from sodium lignin sulfonate; Calcium lignosulfonate; Lauryl alcohol polyethylene glycol oxide base ether sodium sulfate; The alkyl naphthalene formaldehyde condensate sulfonates; Neopelex; Lauryl sodium sulfate; Enuatrol; Potassium oleate; Alkyl polyoxyethylene ether sulfonate; The APES formaldehyde condensation products; APES; NPE; The polyoxyethylene poly-oxygen propylene aether block copolymer; Draw back powder; The dodecyl polyoxyethylene ether phosphate; In the alkyl naphthalene formaldehyde condensate sulfonates one or more.
Thickener can be any or several kinds that are selected from xanthans, heteroglycan, CMC, hydroxyethylcellulose, methylcellulose, gum Arabic, sodium alginate, polyvinyl alcohol, the aluminium-magnesium silicate.
Stabilizing agent can be to be selected from chloropropylene oxide, pyrogallol, butyl glycidyl ether, potassium sorbate, Sodium Benzoate, epoxidised soybean oil, linseed oil, BHA, BHT, citric acid, PABA, castor oil, olive oil, hydroquinones, bisnaphthol, salicylic acid, the soluble starch one or more.
Antifoaming agent can be to be selected from silicone oil, silicone, C10-20 saturated fat acids, the C8-10 aliphatic alcohols one or more.
Antifreezing agent is to be selected from ethylene glycol, propane diols, glycerine, polyethylene glycol, sorbierite, the urea element one or more.
The pH regulator agent is to be selected from sodium hydroxide, ammoniacal liquor, acetic acid, hydrochloric acid, citric acid and the phosphoric acid one or more.
The agricultural chemicals suspension agent that contains organic silicon surfactant of the present invention consists of pesticide activity component 0.5%～80% by weight, and organic silicon surfactant is 0.5%～25%, and all the other are auxiliary element and water.
Further, the composition of agricultural chemicals suspension agent of the present invention is by weight:
Pesticide activity component 0.5%～80% wetting dispersing agent 0.5%～30%
Organic silicon surfactant 0.5%～25% antifoaming agent 1.0%～10%
Antifreezing agent 0.2%～5.0% thickener 0.3%～10%
PH regulator agent 0.1%～5.0% stabilizing agent 0.01%～20%
Water 15%～80%.
Agricultural chemicals suspension agent of the present invention can prepare through following method:
Pesticide activity component and wetting dispersing agent are fully mixed, perhaps earlier several kinds of pesticide activity components are mixed in proportion, fully mix with wetting dispersing agent again.Add organic silicon surfactant, antifoaming agent, thickener, stabilizing agent, antifreezing agent, thixotropic agent, pH regulator agent and deionized water then successively, stir while adding evenly, in ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Agricultural chemicals suspension agent of the present invention is owing to be scattered in the particle of pesticide activity component with miniaturization in the water, and added organic silicon surfactant therein, thereby has the following advantages: (1) flash-point is high, does not burn, and does not explode, and produces to store and safe in utilization; (2) dust is few, and environmental pollution is little, to the producer and user and Environmental security; (3) with water be matrix, aboundresources, product cost is low, easily packing; (4) have low surface tension after the said preparation spraying, good in the target surface wettability, sprawl with infiltration capacity by force, be distributed in the target surface with fine particle, help improving drug effect; (5) the organosilicon auxiliary agent can significantly reduce solution surface tension, reduces the contact angle between soup and the target, therefore can promote that soup penetrates into epidermis through pore, and soup absorbs fast, thereby can fall the opposing rainwash.
The invention provides a kind of efficient, low toxicity, agricultural chemicals suspension agent that biological effective rate of utilization is high, comparatively friendly to environment.Said preparation is with water to replace organic solvent; And novel surfactant-organic silicon surfactant is incorporated in the processing of agricultural chemicals suspension agent; Physics peptizaiton by dispersant and ball mill; Pesticide activity component to be dispersed in below the 5um in the water, is formed a kind of physical stability, chemical stability, all good agricultural chemicals suspension agents of preparation effect property.Preparation technology of the present invention is simple, and production cost is low.
Embodiment:
Essence for a better understanding of the present invention specifies technology contents of the present invention with instance below, but content of the present invention is not limited thereto.
One: 20% AVM Tebufenozide suspending agent of embodiment
Each constituent content is AVM 1%, worm hydrazides 19% by weight; Dispersant SFR 4%, wetting agent NNO 3%, add water to 100% at organic silicon surfactant 5%, silicone defoaming agent 1%, antifreeze glycol 3.0%, thickener xanthans 1%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 1%, aluminium-magnesium silicate 3.0%.
The preparation process is: earlier AVM, worm hydrazides and wetting dispersing agent are fully mixed; Add organic silicon surfactant, antifoaming agent, thickener, stabilizing agent, antifreezing agent, thixotropic agent, PH conditioning agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Two: 28% carbendazim jinggangmeisus of embodiment suspending agent
Each constituent content is carbendazim 24%, jinggangmeisu 4% by weight; Wetting dispersing agent MF7%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreezing agent glycerine 3.0%, thickener xanthans 1%, add water to 100% at suspending agent aluminium-magnesium silicate 2%, PH conditioning agent 1.0%, stabilizing agent potassium sorbate 0.5%.
The preparation process is: earlier carbendazim active compound, jinggangmeisu stoste and wetting dispersing agent are fully mixed; Add organic silicon surfactant, antifoaming agent, thickener, stabilizing agent, antifreezing agent, PH conditioning agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Three: 20% clofentezine suspension agents of embodiment
Each constituent content is four mite piperazines 20%, wetting agent Morwet EFW 2% by weight; Dispersant Morwet D-4254%, organic silicon surfactant 2%, silicone defoaming agent 1%, antifreeze glycol 2.0%, thickener CMC 0.5%, PH conditioning agent 1.0%, stabilizing agent potassium sorbate 0.5% add water to 100%.
The preparation process is: earlier the former medicine of 95% 4 mite piperazine and wetting agent, dispersant are fully mixed; Add organic silicon surfactant, silicone defoaming agent, thickener, stabilizing agent, antifreezing agent, PH conditioning agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Four: 5% fluorine worms of embodiment nitrile suspending agent
Each constituent content is fluorine worm nitrile 20%, wetting agent Morwet EFW 2% by weight; Dispersant Morwet D-4254%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreezing agent glycerine 3.0%, thickener CMC 0.5%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
The preparation process is: earlier fluorine worm nitrile and wetting dispersing agent are fully mixed; Add organic silicon surfactant, silicone defoaming agent, thickener, stabilizing agent, antifreezing agent, PH conditioning agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Five: 20% Tebufenozide suspending agents of embodiment
Each constituent content is worm hydrazides 20%, wetting agent Morwet EFW 3% by weight; Dispersant Morwet D-4253%, organic silicon surfactant 6%, silicone defoaming agent 1%, antifreeze glycol 5.0%, thickener xanthan gum 0.5%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
The preparation process is: earlier worm hydrazides and wetting dispersing agent are fully mixed; Add organic silicon surfactant, silicone defoaming agent, thickener, stabilizing agent, antifreezing agent, PH conditioning agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Six: 30% phonetic mould amine suspending agents of embodiment
Each constituent content is phonetic mould amine 30%, wetting agent Morwet EFW 3% by weight; Dispersant Morwet D-4255%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreeze glycol 5.0%, thickener xanthan gum 0.5%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
The preparation process is: earlier phonetic mould amine and wetting dispersing agent are fully mixed; Add organic silicon surfactant, silicone defoaming agent, thickener, stabilizing agent, antifreezing agent and deionized water then successively; Stir while adding evenly; In ball mill ball milling 2.5-4 hour, obtain the suspending agent of particle diameter below 5um.
Embodiment seven: the evaluation of preparation physicochemical property effect property
To adding the preparation of organic silicon surfactant described in the present invention, the assay method of each item evaluation index is following:
1, surface tension (Υ)
The mensuration of medical liquid surface tension adopts platinum plate method.When the surface tension of soup was lower than the surface free energy of target, soup just might and be sprawled at the target moistened surface.
2, dynamic contact angle (θ)
Dynamic contact angle adopts contact angle measurement to measure, and adopts video method.The soup that dynamic contact angle is little is strong to wettability on the selected target.
3, drop expanding area (S)
The mensuration of drop expanding area adopts integration method.The drop expanding area has directly been represented the extended capability of soup on the target surface, and the drop expanding area is big, shows that the preparation spreadability is good.
Table 1 preparation effect property of the present invention evaluation (dilution 2000 *)
| The mensuration project | CK | FORMULATION EXAMPLE 1 |
| Surface tension (mN/m) | 34.31 | ?22.1 |
| Contact angle during 30s (°) | 60.2 | ?35.7 |
| Expansion radius (mm) during 30s | 2.38 | ?3.90 |
The effect property evaluation of table 2 preparation of the present invention (dilution 1000 *)
| The mensuration project | CK | FORMULATION EXAMPLE 2 |
| Surface tension (mN/m) | 38.2 | ?22.9 |
| Contact angle during 30s (°) | 66.2 | ?40.9 |
| Expansion radius (mm) during 30s | 2.04 | ?3.58 |
The effect property evaluation of table 3 preparation of the present invention (dilution 1000 *)
| The mensuration project | CK | FORMULATION EXAMPLE 3 |
| Surface tension (mN/m) | 36.7 | ?22.7 |
| Contact angle during 30s (°) | 64.3 | ?41.9 |
| Expansion radius (mm) during 30s | 2.46 | ?3.73 |
The effect property evaluation of table 4 preparation of the present invention (dilution 2000 *)
| The mensuration project | CK | FORMULATION EXAMPLE 4 |
| Surface tension (mN/m) | 38.6 | ?22.4 |
| Contact angle during 30s (°) | 62.1 | ?39.5 |
| Expansion radius (mm) during 30s | 2.41 | ?3.29 |
The effect property evaluation of table 5 preparation of the present invention (dilution 1000 *)
| The mensuration project | CK | FORMULATION EXAMPLE 5 |
| Surface tension (mN/m) | 37.0 | ?22.3 |
| Contact angle during 30s (°) | 69.8 | ?38.4 |
| Expansion radius (mm) during 30s | 2.08 | ?3.19 |
Annotate: in the above experiment, CK all adopts the water of equivalent to substitute organic silicon surfactant, and all the other prescriptions are with according to the invention same.
Can find out that from above mensuration result surface tension, the contact angles and wetting time that preparation can reduce soup is effectively shone in the preparation comparison that is added with organic silicon surface active agent, increases the expanding area of drop.
Embodiment eight: preparation field efficacy control efficiency is estimated
For the agricultural-chemical suspension preparation of further checking employing the present invention production and the advance of the conventional agricultural chemicals suspension agent of producing, carried out field control effectiveness test respectively, employing method and result are described below.Below in the experiment, CK adopts the water of equivalent to substitute organic silicon surfactant, all the other prescriptions with according to the invention together.
1,20% AVM Tebufenozide suspending agent field control effectiveness test
Trial crops is a wild cabbage, and controlling object is a diamond-back moth 1-2 instar larvae, with 2000 times of preparation dilutions, restrains even spraying by mu with amount of formulation 50, dispenser once, each handles triplicate, 2 days and 7 days investigation prevention effects behind the medicine, the result sees the following form.
Table 6 20% AVM Tebufenozide suspending agent control diamond-back moth effect relatively
2,20% clofentezine suspension agent field control effectiveness test
Trial crops is a mandarin tree, and controlling object is a two spotted spider mite, with 3000 times of preparation dilutions, even spraying, dispenser once, each handles triplicate, 2 days, 15 days investigation prevention effects behind the medicine, the result sees the following form.
Table 7 20% clofentezine suspension agent control citrus red mite effect relatively
3,20% Tebufenozide suspending agent field control effectiveness test
Trial crops is a wild cabbage, and controlling object is a beet armyworm 1-2 instar larvae, with 1000 times of preparation dilutions, restrains even spraying by mu with amount of formulation 100, dispenser once, each handles triplicate, 2 days and 7 days investigation prevention effects behind the medicine, the result sees the following form.
Table 8 20% Tebufenozide suspending agent control beet armyworm effect relatively
4,30% phonetic mould amine suspending agent field control effectiveness test
Trial crops is a tomato, and controlling object is a gray mold, with 1000 times of preparation dilutions, with amount of formulation 100 gram even spraying, in the dispenser of gray mold their early stage once, executes medicine for the second time after 10 days, altogether the dispenser secondary by mu.Each handles triplicate, for the first time 10 days and 10 days preventive effects behind the medicine for the second time behind the medicine of investigation respectively, and the result sees the following form.
Table 9 30% phonetic mould amine suspending agent is prevented and treated the gray mold effect relatively
Claims (6)
1. agricultural chemicals suspension agent; It is 20% AVM Tebufenozide suspending agent; Wherein each constituent content is by weight: AVM 1%, worm hydrazides 19%; Dispersant SFR4%, wetting agent NNO 3%, add water to 100% at organic silicon surfactant 5%, silicone defoaming agent 1%, antifreeze glycol 3.0%, thickener xanthans 1%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 1%, aluminium-magnesium silicate 3.0%.
2. agricultural chemicals suspension agent; It is 28% carbendazim jinggangmeisu suspending agent; Wherein each constituent content is by weight: carbendazim 24%, jinggangmeisu 4%; Wetting dispersing agent MF7%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreezing agent glycerine 3.0%, thickener xanthans 1%, add water to 100% at suspending agent aluminium-magnesium silicate 2%, PH conditioning agent 1.0%, stabilizing agent potassium sorbate 0.5%.
3. agricultural chemicals suspension agent; It is 20% clofentezine suspension agent; Wherein each constituent content is by weight: four mite piperazines 20%, wetting agent Morwet EFW 2%; Dispersant Morwet D-4254%, organic silicon surfactant 2%, silicone defoaming agent 1%, antifreeze glycol 2.0%, thickener CMC 0.5%, PH conditioning agent 1.0%, stabilizing agent potassium sorbate 0.5% add water to 100%.
4. agricultural chemicals suspension agent; It is 5% fluorine worm nitrile suspending agent; Wherein each constituent content is by weight: fluorine worm nitrile 20%, wetting agent Morwet EFW 2%; Dispersant Morwet D-4254%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreezing agent glycerine 3.0%, thickener CMC 0.5%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
5. agricultural chemicals suspension agent; It is 20% Tebufenozide suspending agent; Wherein each constituent content is by weight: worm hydrazides 20%, wetting agent Morwet EFW 3%; Dispersant Morwet D-4253%, organic silicon surfactant 6%, silicone defoaming agent 1%, antifreeze glycol 5.0%, thickener xanthan gum 0.5%, PH conditioning agent 1.0%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
6. agricultural chemicals suspension agent; It is 30% phonetic mould amine suspending agent; Wherein each constituent content is by weight: phonetic mould amine 30%, wetting agent Morwet EFW 3%; Dispersant Morwet D-4255%, organic silicon surfactant 8%, silicone defoaming agent 1%, antifreeze glycol 5.0%, thickener xanthan gum 0.5%, stabilizing agent Sodium Benzoate 0.5% add water to 100%.
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