CN102057898A - Diazinon emulsion in water (EW) and preparation method thereof - Google Patents
Diazinon emulsion in water (EW) and preparation method thereof Download PDFInfo
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- CN102057898A CN102057898A CN2009101989458A CN200910198945A CN102057898A CN 102057898 A CN102057898 A CN 102057898A CN 2009101989458 A CN2009101989458 A CN 2009101989458A CN 200910198945 A CN200910198945 A CN 200910198945A CN 102057898 A CN102057898 A CN 102057898A
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Abstract
The invention discloses diazinon emulsion in water (EW) and a preparation method thereof. The diazinon EW mainly comprises the following components in percentage by weight: 20-60% of diazinon, 2-8% of an emulsifier, 0.1-3% of a thickener, 0-15% of an adjuvant and the balance of water, wherein, the total weight percentage is 100%. The invention further discloses the preparation method of the diazinon EW. The preparation method comprises the following steps: taking the diazinon as an oil phase; mixing the oil phase with an aqueous phase composed of the emulsifier, the thickener and the adjuvant comprising a stabilizer, an anti-freezing agent and the like; and homogenizing at a high speed to finally blending to obtain the diazinon EW. The diazinon EW is a pesticide preparation formed by uniformly dispersing liquid drops in water, wherein, the liquid drops are obtained by dissolving a liquid bulk medicament or a solid bulk medicament in an organic solvent, and water is utilized as a medium instead of the organic solvent in emulsifiable concentrate. Therefore, the diazinon EW has the advantages of low manufacturing cost, low toxicity, nonflammability, high safety to people and environment and the like, and the organic solvent is saved.
Description
Technical field
The invention belongs to formulations of pesticide manufacture field, be specifically related to be oil phase and be that basic dispersion medium is made pesticides new formulation diazinon aqueous emulsion of aqueous emulsion and preparation method thereof with water with the organophosphorus insecticide diazinon.
Background technology
Diazinon (Diazinon), chemical name: O, O-diethyl-O-(2-isopropyl-6-methyl-4-pyrimidine radicals) phosphorothionate. physicochemical property: yellow liquid, boiling point 83-84 ℃/26.6Pa, vapour pressure 12MPa (25 ℃), relative density 1.11, solvability in water (20 ℃) is 60mg/L, with the OOS unmixing.Easily oxidation more than 100 ℃, neutral medium is stable, and hydrolysis is quickened in slowly hydrolysis in the alkaline medium in the acid medium.
Diazinon is a broad-spectrum organophosphorous pesticide, have tag, stomach toxicity, stifling and certain systemic function, be used to control sucking pest and defoliator on the crop on a large scale.Its mechanism of action is acetylcholine esterase inhibition.Various pests such as Lepidoptera, Homoptera all there is favorable effect, also can dress seed and prevent and treat soil insect, can be used for cotton control cotten aphid, two-spotted spider mite, cabbage caterpillar, vegetable aphid, round onions Liriomyza, beans kind fly, chilo suppressalis, paddy stem borer, rice gall midge, rice fulgorid, rice leafhopper, ricestem-fly, corn, wheat, peanut soil pest, also can be used for the health medication.
Diazinon is the wide spectrum of succeeding in developing in 1956, efficient, low toxicity, low-residual insecticidal/acaricidal agent, and annual consumption is about 50,000 tons, and each relationship and primary grain producing of the world all has a large amount of uses.At present, because high malicious organophosphorous pesticide is about to forbidding comprehensively, as its alternative kind, the prospect of diazinon is wide, and market potential is very huge, and present diazinon mainly is processed into cream preparation and granule uses.
Remain based on missible oil in China agricultural chemicals selling market at present, in the missible oil processing in a large number with an organic solvent (toluene, dimethylbenzene) as matrix, this class organic solvent is inflammable and explosive, serious environment pollution, and people and animals are constituted direct harm, also waste a large amount of non-renewable resources.In recent years, environmental protection pressure constantly increases and various countries environmental administration makes severeer rules to the safety and the environmental protection of agricultural chemicals along with the whole world faces, force people to develop the pesticides new formulation of safety, environment-friendly type, wherein aqueous emulsion (EW) replaces inflammable, explosive, poisonous oil-based formulation missible oil, is just becoming the direction of pesticidal preparations development in the world.
Summary of the invention
The present invention is in order to overcome the problems referred to above that prior art exists, and a kind of diazinon environmental protection that provides is new--diazinon aqueous emulsion and preparation method thereof, the present invention is dissolved in the pesticidal preparations that forms in the uniform disperse water of liquid pearl of organic solvent gained with former medicine of liquid or the former medicine of solid, water replaces in the missible oil organic solvent as medium, both saved organic solvent, have again low cost of manufacture, toxicity low, nonflammable, to advantages such as human and environment safety.
To achieve these goals, the invention provides a kind of diazinon aqueous emulsion, be characterized in, the component that mainly contains following percentage by weight: diazinon 20～60%, emulsifier 2～8%, thickener 0.1～3%, adjuvant 0～15%, water: surplus, described total weight percent are 100%.
Above-mentioned diazinon aqueous emulsion, wherein, described emulsifier is selected from the one or more kinds of combinations in the fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether phosphate, styrene phenol formaldehyde resin, polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy, polyethenoxy ether, macromolecule EO-PO block copolymer, this dish SPAN, soil temperature TWEEN of Nonyl pheno, alkylphenol-polyethenoxy polyethers and the sulphate thereof of NP series or phosphoric acid fat, AEO series.
Above-mentioned diazinon aqueous emulsion, wherein, described thickener is selected from a kind of in xanthans XG, cellulose ether and derivative thereof, PVAC polyvinylalcohol, aluminium-magnesium silicate, gelatin, gum Arabic, bentonite, dextrin, polyvinylpyrrolidone PVP, the white carbon.
Above-mentioned diazinon aqueous emulsion, wherein, described adjuvant is selected from one or more the combination in antifreeze, viscosity modifier, PH conditioning agent, sterilization antiseptic, the defoamer; Wherein:
It is a kind of of ethylene glycol, propane diols, glycerine, polyethylene glycol, isopropyl alcohol, urea that described antifreeze is selected from antifreeze, and it accounts for 3～10% of total weight percent;
Described stabilizing agent is selected from a kind of among epoxidized soybean oil, epoxychloropropane, BHA, the BHT, and it accounts for 1～3% of total weight percent;
Described PH acid-base modifier is selected from a kind of in glacial acetic acid, hydrochloric acid, ammoniacal liquor, monoethanolamine, the diethylenetriamine, and institute's expense is adjusted in the stability range for the pH value with final products;
Described sterilization antiseptic is selected from a kind of in potassium sorbate, Sodium Benzoate, formaldehyde, the isothiazolinone, and it accounts for 0.1～0.5% of total weight percent;
Described defoamer is selected from a kind of in silicon defoamer, polyethers defoamer, higher alcohols, tributyl phosphate, the polysiloxane defoamers, and it accounts for 0.5～1.5% of total weight percent.
Above-mentioned diazinon aqueous emulsion, wherein, described water is deionized water or distilled water.
The present invention also provides a kind of preparation method of diazinon aqueous emulsion, is characterized in, according to above-mentioned raw material components and ratio, may further comprise the steps:
Step 1, the former medicine of diazinon is inserted in first container, add an amount of emulsifier, adjuvant, be stirred into oil phase;
Step 2, Jiang Shui insert in second container, add an amount of emulsifier, thickener, adjuvant in this water, stir evenly into water;
Step 3, the oil phase that configures is poured in the container of water, and the high speed homogenizing, stable O/W emulsion formed;
Step 4, stirring again add an amount of thickener, adjuvant, stir, and promptly make the diazinon aqueous emulsion.
The preparation method of above-mentioned diazinon aqueous emulsion, wherein, described adjuvant comprises stabilizing agent, also comprises the adding stabilizing agent in the described step 1.
The preparation method of above-mentioned diazinon aqueous emulsion, wherein, described adjuvant comprises defoamer, PH acid-base modifier, also comprises in the described step 2 adding defoamer and PH acid-base modifier.
The preparation method of above-mentioned diazinon aqueous emulsion, wherein, described adjuvant comprises antifreeze and bactericide, also comprises in the described step 4 adding antifreeze and bactericide.
The present invention is owing to adopted above technical scheme, and the technique effect of its generation is tangible:
1, the present invention replaces whole or most of organic solvents with water, the active component drop disperses the back particle diameter less than 1.5 μ m, the outward appearance milk shape that is white in color, pour in the water outward appearance into missible oil during dilute with water and there is no differently, comparing with missible oil on preparation and safety in utilization, cost, transportation, packing has more advantages.
2, the present invention is dissolved in the pesticidal preparations that forms in the uniform disperse water of liquid pearl of organic solvent gained with former medicine of liquid or the former medicine of solid, water replaces in the missible oil organic solvent as medium, both saved organic solvent, have again low cost of manufacture, toxicity low, nonflammable, to advantages such as human and environment safety.
Embodiment
The present invention has adopted a kind of low cost, be convenient to the diazinon method for producing aqueous emulsion and the process route of suitability for industrialized production, be oil phase with the diazinon with emulsifier, thickener and comprise that the water that the adjuvant of stabilizing agent, antifreeze etc. is formed mixes high speed homogenizing afterwards, is deployed into the diazinon aqueous emulsion at last.The percentage by weight of the formula constituent of diazinon aqueous emulsion of the present invention is as follows:
In the above-mentioned component:
Described emulsifier is selected for use, one or more kinds of being used in combination among Nonyl pheno (NP series), alkylphenol-polyethenoxy polyethers and sulphate thereof or phosphoric acid fat, fatty alcohol-polyoxyethylene ether (AEO series), polyoxyethylene nonylphenol ether phosphate, styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy polyethenoxy ether, macromolecule EO-PO block copolymer, this dish SPAN, the soil temperature TWEEN.
Described thickener is selected from wherein a kind of of xanthans XG, cellulose ether and derivative thereof (CMC, HEC, MC, etc.), PVAC polyvinylalcohol, aluminium-magnesium silicate, gelatin, gum Arabic, bentonite, dextrin, polyvinylpyrrolidone PVP, white carbon, preferred xanthans, cellulose ether and derivative thereof.
Described adjuvant is selected from one or more the combination in antifreeze, viscosity modifier, PH conditioning agent, sterilization antiseptic, the defoamer; Wherein:
It is a kind of of ethylene glycol, propane diols, glycerine, polyethylene glycol, isopropyl alcohol, urea that described antifreeze is selected from antifreeze, and it accounts for 3～10% of total weight percent;
Described stabilizing agent is selected from a kind of among epoxidized soybean oil, epoxychloropropane, BHA, the BHT, and it accounts for 1～3% of total weight percent;
Described PH acid-base modifier is selected from a kind of in glacial acetic acid, hydrochloric acid, ammoniacal liquor, monoethanolamine, the diethylenetriamine, and institute's expense is adjusted in the stability range for the pH value with final products;
Described sterilization antiseptic is selected from a kind of in potassium sorbate, Sodium Benzoate, formaldehyde, the isothiazolinone, and it accounts for 0.1～0.5% of total weight percent;
That described defoamer is selected from is silicone based, a kind of in the low-carbon alcohols, and it accounts for 0.5～1.5% of total weight percent.
Described water is deionized water or distilled water.
For better explanation the technology of the present invention, below, describe the present invention in detail with reference to some embodiment and experimental condition, but described embodiment and condition are not meaned, should be understood that limitation of the present invention yet.Any technical staff in the art is appreciated that, in not departing from the desired spirit and scope of claims of the present invention, all can be used for a variety of modifications and variations, so protection scope of the present invention is with being as the criterion that claims scope is defined.
Embodiment one:
The former medicine 20g of folding hundred diazinons is inserted in the container ZS-614 (for example macromolecule EO-PO block copolymer product of Zhong Mountain chemical industry Co., Ltd), the epoxychloropropane 1g that adds 1g stir (oil phase); The 10% PVAC polyvinylalcohol aqueous solution of the emulsifier MD-T of 3.0g (for example Nantong joins the EO-PO block copolymer product of agricultural pesticidal preparations Co., Ltd), 10g is joined in another container of the deionized water that fills 55g and stir evenly (water); The oil phase that configures to going in the water compatible device and opening the high speed homogenizing, is formed stable O/W emulsion; Open to stir (keeping 600 changes/and min), 2% xanthan gum solution, ethylene glycol 5g, glacial acetic acid 0.1g, triumphant loose 0.1g (preservative) that the back adds 15g stir, and promptly make 20% diazinon aqueous emulsion.
Embodiment two:
Plutonic PE10500 (for example EO/PO block polyether product of German BASF AG), the 2g epoxidized soybean oil that in the former medicine 40g of folding hundred diazinons, adds 2g stir (oil phase); Emulsifier TERSPERSE 2210 (for example polyoxyethylene nonylphenol ether product of Hensel Man), silicone defoaming agent 0.3g, aluminium-magnesium silicate 1.0g, the glacial acetic acid 0.2g of 4.0g joined in the deionized water of 46g and stir evenly (water); The oil phase that configures in the container of going into water and open the high speed homogenizing, is formed stable O/W emulsion; Open to stir (keeping 300 changes/and min), 2% xanthan gum solution, propane diols 5g, Proxell GXL 0.1g (bactericide) that the back adds 10g stir, and promptly make 40% diazinon aqueous emulsion.
Embodiment three:
Atlox 4912 (for example nonionic block copolymer product of Britain's standing grain major company), the epoxychloropropane 3g that adds 3g at the former medicine 60g of folding hundred diazinons stir (oil phase); To stir evenly (water) in the thickener polyvinylpyrrolidone PVP of emulsifier Ethylan NS-500LQ (for example hydroxyl polyethylene oxide block copolymer product of Aksu company), the 0.5g of emulsifier Dispersogen LFS (for example auxiliary agent product of Ke Laisi company), the 2g of 3g, the deionized water that silicone defoaming agent 0.3g joins 25g; The oil phase that configures in the container of going into water and open the high speed homogenizing, is formed stable O/W emulsion; Open to stir (keeping 400 changes/and min), 2% xanthan gum solution, propane diols 5g, triumphant loose 0.1g (preservative) that the back adds 5g stir, and promptly make 60% diazinon aqueous emulsion.
The key technical indexes of formulation products of the present invention is as follows:
1. the traditional performance index of preparation, ask for an interview table 1:
Table 1
2. heat storage stability test
The diazinon aqueous emulsion is stored 14d in (54 ± 2) ℃ insulating box, use the content of efficient liquid phase chromatographic analysis effective ingredient respectively before and after storing, analytical error is ± 1%, the results are shown in Table 2.As seen diazinon aqueous emulsion heat storage stability is good.
Table 2, diazinon aqueous emulsion heat storage stability result
The test of pesticide effectiveness interpretation of result of product of the present invention:
Be the land for growing field crops drug effect effect of checking formulation products, select the 60% diazinon aqueous emulsion of embodiment three to do the test of pesticide effectiveness, the result is as follows:
This test fixes on the 4th generation striped rice borer 1 instar larvae peak period (September 15) dispenser, and this moment, paddy rice was in heading stage.The interior situation that influences to paddy growth, leaf look etc. of 15d behind the range estimation medicine, the examination medicament is to the safety of paddy rice.10d before the results, 50 clumps of paddy rice (neat mud cuts rice) are investigated in the parallel great-jump-forward sampling in every sub-district, look into the insect bite strain, calculate seedling protecting effect (see Table 3, table 3 is 60% diazinon aqueous emulsion control rice-stem borer test of pesticide effectiveness results).According to observing behind the medicine, 3 doses of 60% diazinon aqueous emulsion are handled, and all do not find poisoning phenomenons such as the flavescence of rice leaf, medicine spot, illustrate that this medicine is safer to paddy rice in the dose concentration of this test.
Table 3 60% diazinon aqueous emulsion control rice-stem borer test of pesticide effectiveness result:
Annotate: listed test data is 4 times and repeats mean value in the table, in the table behind the numerical value alphabetical identical person to represent to test difference not remarkable.
Experimental result shows: 60% diazinon aqueous emulsion is to rice safety, 667m
2With more than the 35ml striped rice borer being had desinsection seedling protecting effect preferably, approaching with the 5% fluorine worm nitrile SC effect that is currently applied on the paddy rice, be the good medicine of effective replacement fluorine worm cyanogen, the medicament that can be used as the control striped rice borer is promoted the use of on producing.
Claims (9)
1. the diazinon aqueous emulsion is characterized in that, mainly contains the component of following percentage by weight:
2. diazinon aqueous emulsion according to claim 1, it is characterized in that described emulsifier is selected from the one or more kinds of combinations in the fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether phosphate, styrene phenol formaldehyde resin, polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy, polyethenoxy ether, macromolecule EO-PO block copolymer, this dish SPAN, soil temperature TWEEN of Nonyl pheno, alkylphenol-polyethenoxy polyethers and the sulphate thereof of NP series or phosphoric acid fat, AEO series.
3. diazinon aqueous emulsion according to claim 1, it is characterized in that described thickener is selected from a kind of in xanthans XG, cellulose ether and derivative thereof, PVAC polyvinylalcohol, aluminium-magnesium silicate, gelatin, gum Arabic, bentonite, dextrin, polyvinylpyrrolidone PVP, the white carbon.
4. diazinon aqueous emulsion according to claim 1 is characterized in that, and is described
Described adjuvant is selected from one or more the combination in antifreeze, viscosity modifier, PH conditioning agent, sterilization antiseptic, the defoamer; Wherein:
It is a kind of of ethylene glycol, propane diols, glycerine, polyethylene glycol, isopropyl alcohol, urea that described antifreeze is selected from antifreeze, and it accounts for 3～10% of total weight percent;
Described stabilizing agent is selected from a kind of among epoxidized soybean oil, epoxychloropropane, BHA, the BHT, and it accounts for 1～3% of total weight percent;
Described PH acid-base modifier is selected from a kind of in glacial acetic acid, hydrochloric acid, ammoniacal liquor, monoethanolamine, the diethylenetriamine, and institute's expense is adjusted in the stability range for the pH value with final products;
Described sterilization antiseptic is selected from a kind of in potassium sorbate, Sodium Benzoate, formaldehyde, the isothiazolinone, and it accounts for 0.1～0.5% of total weight percent;
That described defoamer is selected from is silicone based, a kind of in the low-carbon alcohols, and it accounts for 0.5～1.5% of total weight percent.
5. diazinon aqueous emulsion according to claim 1 is characterized in that, described water is deionized water or distilled water.
6. the preparation method of diazinon aqueous emulsion is characterized in that, according to described raw material components of claim 1-5 and ratio, may further comprise the steps:
Step 1, the former medicine of diazinon is inserted in first container, add an amount of emulsifier, adjuvant, be stirred into oil phase;
Step 2, Jiang Shui insert in second container, add an amount of emulsifier, thickener, adjuvant in this water, stir evenly into water;
Step 3, the oil phase that configures in the container of going into water, and high speed homogenizing forms stable O/W emulsion;
Step 4, stirring again add an amount of thickener, adjuvant, stir, and promptly make the diazinon aqueous emulsion.
7. the preparation method of diazinon aqueous emulsion according to claim 6 is characterized in that, described adjuvant comprises stabilizing agent, also comprises the adding stabilizing agent in the described step 1.
8. the preparation method of diazinon aqueous emulsion according to claim 6 is characterized in that, described adjuvant comprises defoamer, PH acid-base modifier, also comprises in the described step 2 adding defoamer and PH acid-base modifier.
9. the preparation method of diazinon aqueous emulsion according to claim 6 is characterized in that, described adjuvant comprises antifreeze and bactericide, also comprises in the described step 4 adding antifreeze and bactericide.
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| CN2009101989458A CN102057898A (en) | 2009-11-17 | 2009-11-17 | Diazinon emulsion in water (EW) and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105165846A (en) * | 2015-09-17 | 2015-12-23 | 上海万厚生物科技有限公司 | BBIT water emulsion and preparation method thereof |
| CN115444004A (en) * | 2022-08-16 | 2022-12-09 | 南通江山农药化工股份有限公司 | Insecticidal aqueous emulsion and application thereof |
| CN116019094A (en) * | 2022-12-13 | 2023-04-28 | 新沂市泰松化工有限公司 | Environment-friendly diazinon and preparation method thereof |
-
2009
- 2009-11-17 CN CN2009101989458A patent/CN102057898A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105165846A (en) * | 2015-09-17 | 2015-12-23 | 上海万厚生物科技有限公司 | BBIT water emulsion and preparation method thereof |
| CN115444004A (en) * | 2022-08-16 | 2022-12-09 | 南通江山农药化工股份有限公司 | Insecticidal aqueous emulsion and application thereof |
| CN116019094A (en) * | 2022-12-13 | 2023-04-28 | 新沂市泰松化工有限公司 | Environment-friendly diazinon and preparation method thereof |
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Application publication date: 20110518 |