CN104855403A - Non-organic-solvent type pyraclostrobin micro-capsule suspending agent and preparation method thereof - Google Patents
Non-organic-solvent type pyraclostrobin micro-capsule suspending agent and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a non-organic-solvent type pyraclostrobin micro-capsule suspending agent and a preparation method thereof, belonging to the technical field of pesticides. The micro-capsule suspending agent comprises the following components by weight percent: 5-60% of pyraclostrobin, 1-15% of capsule wall material, 0.1-3% of protecting glue, 2-5% of an emulsifying agent, 2-5% of a dispersing agent, 1-14% of adjuvant and 10-80% of water. The preparation method comprises the following steps: (1) adding isocyanate into pyraclostrobin, and stirring uniformly to form an oil phase; (2) adding the emulsifying agent and the protecting glue into water to form a water phase, adding the prepared oil phase, and homogenizing to form an emulsion; (3) adding polyamine or polyol into the emulsion, carrying out polymerization reaction and curing to form capsules; and (4) adding a pH adjustment agent to achieve the needed pH value, then adding the dispersing agent and the adjuvant, and stirring to obtain a finished product. With the micro-capsule suspending agent provided by the invention, the environment harm can be alleviated while the medicament lasting period is effectively prolonged, and the preparation process is novel.
Description
Technical field
The present invention relates to technical field of pesticide, be specifically related to a kind of organic solvent-free type pyraclostrobin microcapsule suspending agent and preparation method.
Background technology
Pyraclostrobin structural formula is as follows:
Pyraclostrobin is mitochondrial respiratory inhibitor, is novel wide-spectrum bactericide, by stoping electro transfer in cytochrome synthesis, has the effect of protection, treatment blade infiltration conduction.Through field control effectiveness test result, pyraclostrobin missible oil shows that it has good control efficiency to powdery mildew of cucumber, downy mildew and banana freckle, leaf spot, stalk break etc.
Pyraclostrobin formulation products mainly missible oil, suspending agent, the water dispersible granules of current domestic enterprise registration, these formulation accountings more than 90%, but the product lasting period of these formulations is poor, and drug effect can not lasting stability, and preventive effect is poor.
The domestic product had about pyraclostrobin slow release formulation that appeared in the newspapers, the pyraclostrobin microballoon of such as Institute of Plant Protection of academy of agricultural sciences professor Chen Fuliang research; The pyraclostrobin microcapsule suspending agent patent etc. of UNPROFOR crop science and technology application, but pyraclostrobin microballoon complex manufacturing technology cost is high, and traditional microcapsule suspending agent uses a large amount of organic solvent dissolution pyraclostrobin to be made into microcapsule suspending agent again, organic solvent environmental pollution is serious, to production and user's health hazard large.
Summary of the invention
The object of this invention is to provide a kind of organic solvent-free type pyraclostrobin microcapsule suspending agent and preparation method, this pyraclostrobin microcapsule suspending agent manufacture craft is simple, and cost is low, extends the control lasting period, and environmentally friendly, pollution-free.
In order to realize above object, the present invention adopts following technical scheme:
A kind of organic solvent-free type pyraclostrobin microcapsule suspending agent, described microcapsule suspending agent percentage by weight is composed as follows: pyraclostrobin 5-60%, cyst material 1-15%, protecting glue 0.1-3%, emulsifier 2-5%, dispersant 2-5%, adjuvant 1-14%, water 10-80%.
Described protecting glue is polyvinyl alcohol, gelatin, gum Arabic or xanthans, described emulsifier is lauryl sodium sulfate, the Nonyl pheno of NP series, alkylphenol-polyethenoxy polyethers and sulphate thereof or phosphoric acid ester, the fatty alcohol-polyoxyethylene ether of AEO series, thermally coupled distillation columns, polycarboxylate, alkylphenol-polyethenoxy formaldehyde condensation products sulphate, alkylphenol polyoxyethylene formaldehyde condensation products sulfate phosphates, styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy polyethenoxy ether, alkyl naphthalene formaldehyde condensate sulfonates, dialkyl succinylsuccinate sulfonated ester, this dish, one or more in tween, described dispersant is naphthalenesulfonic acid-formaldehyde condensate, triphenyl vinyl phenol polyethenoxy ether class and derivative eater, fatty alcohol polyethenoxy ether class, alkylphenol polyoxyethylene class, macromolecule EO-PO block copolymer, lignosulfonates, alkylphenol-polyethenoxy formaldehyde condensation products sulphate, alkylphenol polyoxyethylene formaldehyde condensation products sulfate phosphates, styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy polyethenoxy ether, alkyl naphthalene formaldehyde condensate sulfonates, macromolecule dredges a dress copolymer of type, one or more in polymerization of carboxylic acid salt.
Preferably, described protecting glue is polyvinyl alcohol or xanthans.
Described adjuvant is one or more in antifreeze, viscosity modifier, pH adjusting agent, sterilization antiseptic, defoamer.
Described antifreeze is ethylene glycol, propane diols, glycerine, PEG400, isopropyl alcohol or urea, and described antifreeze consumption is the 3-10% of gross weight; Described viscosity modifier is the one in xanthans, cellulose ether and derivative thereof, polyethylene glycol, polyvinyl alcohol, aluminium-magnesium silicate, bentonite, kaolin, diatomite, attapulgite, and described viscosity modifier consumption is the 0.05-3% of gross weight; Described pH acid-base modifier is the one in glacial acetic acid, hydrochloric acid, ammoniacal liquor, monoethanolamine, diethylenetriamine; Described sterilization antiseptic is the one in potassium sorbate, Sodium Benzoate, formaldehyde, isothiazolinone, and the consumption of described sterilization antiseptic is the 0.1-0.5% of gross weight; Described defoamer is the one in silicon defoamer, polyethers defoamer, higher alcohols, tributyl phosphate, polysiloxane defoamers, and described defoamer consumption is the 0.5-1.5% of gross weight.
Described cyst material is carbamide resin.
Described carbamide resin is obtained by interface polymerization reaction by isocyanates and polyalcohol or polyamine, and described isocyanates is one or more repeatedly in methylene polyisocyanates, polyphenyl polymethylene polyisocyanates of toluene di-isocyanate(TDI), methyl diphenylene diisocyanate, polymeric MDI, many phenyl.
Described water is deionized water or distilled water.
A preparation method for above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, comprises the following steps:
(1) make it melt pyraclostrobin heating, being melted to temperature is 65-75 DEG C, adds cyst material monomeric diisocyanate and stirs, and forms oil phase;
(2) in water, add emulsifier and protecting glue in advance, be heated to 65-80 DEG C, stir and be incubated, then add the oil phase that step 1 is pre-configured, high-speed stirred makes its homogenizing, forms stable O/w emulsion;
(3) adjust mixing speed and turn/min to 600-800, the aqueous solution adding cyst material monomeric polycarboxylic amine or polyalcohol carries out interface polymerization reaction, is to keep 2-24 hour under the environment of 65-80 DEG C in reaction temperature, makes cyst material solidify encystation;
(4) after cyst material solidification encystation, add pH acid-base modifier, being adjusted to pH value is 6-8, then adds dispersant, adjuvant, stirs and obtains pyraclostrobin microcapsule suspending agent finished product.
The all preparation process of above-mentioned preparation method all completes under atmospheric pressure state, the cyst wall rule that it is formed, homogeneous, and quality is hard.
The granularity of described organic solvent-free type pyraclostrobin microcapsule suspending agent is between 0.5-10um, and wherein pyraclostrobin content is 5-60%, and concrete content need be formulated according to its different purposes.
Above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent is also a kind of formulation of controlled active ingredient rate of release processed simultaneously, therefore according to its purposes, carrys out Co ntrolled release speed by the shell thickness of micro-capsule, to reach required effect.
Above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent using method is used for the then Direct spraying that added water; Above-mentioned pyraclostrobin microcapsule suspending agent, inapplicable any organic solvent dissolution pyraclostrobin, pyraclostrobin can directly and cyst material monomer form oil phase in a heated state, after emulsification packing formed microcapsule suspending agent.
Its beneficial effect of organic solvent-free type pyraclostrobin microcapsule suspending agent provided by the invention is specific as follows:
The suspending agent of the tiny spherical shape micro-capsule 1, be made up of the capsule-core containing active substance and macromolecule cyst material due to microcapsule suspending agent provided by the invention, the micro-capsule diameter of microcapsule suspending agent is 0.5-10 μm, active substance in capsule-core slow releasing under controlled conditions, to meet suitable preventive effect requirement.After microcapsule suspending agent dilute with water, spraying uses, and relative to other formulations, it has the following advantages:
(1) after microencapsulation, its active ingredient can manual control by the permeability of cyst material; slow release speed can design in advance; owing to thus having the longer lasting period to the Co ntrolled release of active ingredient pyraclostrobin; and due to the protection of capsule skin; active ingredient degradation speed slows down, and its agricultural chemicals lasting period can extend 3-10 doubly, thus improves control efficiency; reduce spraying times, reduce agricultural cost.
(2) active ingredient is wrapped in cyst wall and improves safety, makes preparation reduce toxic grade;
(3) medium uses the organic solvent such as water instead of dimethylbenzene, environmental pollution fall cause minimum, more friendly to environment, environmental protection more; And microcapsules take water as dispersion medium, nonflammable explosive, transportation safety;
(4) wherein to the environmentally harmful solvent of human body, unhappy smell with effectively reduce skin material excitatory;
2, inhibit many environmental factors if light, heat, air, rainwater, soil, microorganism and other chemical substance are to the adverse effect of pesticide activity component after the microencapsulation of pyraclostrobin agricultural chemicals, reduce the speed of the volatilization of agricultural chemicals, decomposition, oxidation, degraded and loss, thus enhance the stability of agricultural chemicals, expand the scope of application.
3, after the microencapsulation of pyraclostrobin agricultural chemicals, because in microcapsule suspending agent, micro-capsule content, generally at 5-60%, compares with missible oil, active ingredient concentrates on the capsule of 30-50% at heart, and due to the effect of suspending agent, adhesive force is strengthened, and improves control efficiency.
4, because microcapsules has Co ntrolled release ability, thus can make that high-toxic pesticide is low to be poisoned, reduce the acute toxicity of former medicine, after being processed into microcapsules, the volatility of agricultural chemicals is subject to very large suppression, and original peculiar smell is also masked, decrease the excitant to people and animals, the pollution to environment and the poisoning to crops, the toxicity of preparation to fish is also greatly alleviated, no matter namely to people and animals or ecotope, all reliably safer.
Embodiment
Embodiment 1
A kind of 10% organic solvent-free type pyraclostrobin microcapsule suspending agent, it is composed as follows: pyraclostrobin 10kg, cyst material monomer: TDI:4kg and hexamethylene diamine 0.4kg, protecting glue: PVAC polyvinylalcohol (20%) 10kg, emulsifier: block polyether A33# (Nanjing Tai Hua Co., Ltd product) 2kg, dispersant: lignosulfonates 5kg, antifreeze: ethylene glycol 5kg, viscosity modifier: xanthans (2%) 3kg, pH adjusting agent: glacial acetic acid 0.1kg, sterilization antiseptic: isothiazolinone 0.4kg, defoamer: silicone defoaming agent 0.3kg, then adding deionized water ad pond om is 100kg.
The preparation method of 10% above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, comprises the following steps:
(1) make it melt pyraclostrobin heating, fusion temperature is 65 DEG C to temperature, adds cyst material monomer TDI and stirs, and forms oil phase;
(2) emulsifier block polyether A33# (product of Nanjing Tai Hua Co., Ltd) and protecting glue polyvinyl alcohol is added in deionized water in advance, polyvinyl alcohol used be 10% polyvinyl alcohol, then be heated to 65 DEG C, stir and be incubated, form aqueous phase; The oil phase configured added aqueous phase and opens high speed homogenizing, forming stable O/w emulsion, recording the average grain diameter 0.5 μm of emulsion;
(3) mixing speed is adjusted to 600 turns/min, then the emulsion that homogenizing is good is warming up to 75 DEG C, slowly adds cyst material monomer diamines simultaneously, and is incubated 3 hours, makes cyst material solidify encystation;
(4) after cyst material solidification encystation, add pH acid-base modifier, being adjusted to pH value is 7, then add dispersant lignosulfonates, antifreeze ethylene glycol, viscosity modifier xanthans, pH adjusting agent glacial acetic acid, sterilization antiseptic isothiazolinone, silicone defoaming agent, stir and obtain pyraclostrobin microcapsule suspending agent finished product.
Embodiment 2
A kind of 20% organic solvent-free type pyraclostrobin microcapsule suspending agent, it is composed as follows: pyraclostrobin 20kg, cyst material monomer: TDI:6kg and hexamethylene diamine 0.5kg, protecting glue: PVAC polyvinylalcohol (10%) 10kg, emulsifier: fatty alcohol-polyoxyethylene ether AEO-9 (Nanjing Tai Hua Co., Ltd product) 4kg, dispersant: lignosulfonates 5kg, antifreeze: ethylene glycol 4kg, viscosity modifier: xanthans (2%) 10kg, pH adjusting agent: glacial acetic acid 0.12kg, sterilization antiseptic: isothiazolinone 0.2kg, defoamer: silicone defoaming agent 0.2kg, then adding deionized water ad pond om is 100kg.
The preparation method of 20% above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, being melted to temperature in its step (1) is 70 DEG C, step is heated to 80 DEG C described in (2), the average grain diameter of gained O/w emulsion is 1.96 μm, in step (3), mixing speed is adjusted to 650 turns/min, the emulsion that homogenizing is good is warming up to 80 DEG C, and temperature retention time is 1 hour, and all the other are with embodiment 1.
Embodiment 3
A kind of 30% organic solvent-free type pyraclostrobin microcapsule suspending agent, it is composed as follows: pyraclostrobin 30kg, cyst material monomer: PAPI:3kg, MDI:2kg and triethanolamine 0.4kg, protecting glue: gum Arabic (5%) 10kg, emulsifier: Tween-60: 2kg, dispersant FD (trade name, Solvay's product, main component is polyether phosphate dispersant): 3kg, antifreeze: propane diols 6kg, viscosity modifier: aluminium-magnesium silicate (2%) 10kg, pH adjusting agent: the HCl of 2% is appropriate, sterilization antiseptic: formaldehyde 0.3kg, defoamer: silicone defoaming agent 0.3kg, then adding deionized water ad pond om is 100kg.
The preparation method of 30% above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, being melted to temperature described in its step (1) is 75 DEG C, step is heated to 70 DEG C described in (2), gained O/w emulsion particle diameter is 2.3 μm, in step (3), mixing speed is adjusted to 700 turns/min, the emulsion that described homogenizing is good is warming up to 72 DEG C, and temperature retention time is 8 hours, and all the other are with embodiment 1.
Embodiment 4
A kind of 40% organic solvent-free type pyraclostrobin microcapsule suspending agent; it is composed as follows: pyraclostrobin 40kg; cyst material monomer: PAPPI:5kg, TDI:0.9kg and triethanolamine 0.6kg, emulsifier SK-560EP:4kg, dispersant SK-92FS1:3kg; antifreeze glycerine: 5kg; protecting glue: 2% xanthans 5kg, pH adjusting agent: glacial acetic acid 0.15kg, sterilization antiseptic: Sodium Benzoate 0.1kg; silicone defoaming agent 0.2kg, then adding deionized water ad pond om is 100kg.
The preparation method of 40% above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, being melted to temperature in its step (1) is 68 DEG C, step is heated to 72 DEG C described in (2), the average grain diameter of gained O/w emulsion is 4.85 μm, in step (3), mixing speed is adjusted to 800 turns/min, the emulsion that homogenizing is good is warming up to 70 DEG C, and temperature retention time is 4 hours, and all the other are with embodiment 1.
Embodiment 5
A kind of 55% organic solvent-free type pyraclostrobin microcapsule suspending agent, it is composed as follows: pyraclostrobin 55kg, cyst material monomer: PAPPI:7kg, TDI:1.5kg and diethylenetriamine 0.7kg, emulsifier EW-36 (trade name, Solvay's product, belong to mixed aid, main component is EO-PO block polyether): 4kg, dispersant t-36 (trade name, Solvay's auxiliary agent, Main Ingredients and Appearance is dispersant polycarboxylate): 3kg, antifreeze glycerine: 5kg, protecting glue: 2% xanthans 5kg, pH adjusting agent: glacial acetic acid 0.175kg, sterilization antiseptic: Sodium Benzoate 0.1kg, silicone defoaming agent 1.5kg, then adding deionized water ad pond om is 100kg.
The preparation method of 55% above-mentioned organic solvent-free type pyraclostrobin microcapsule suspending agent, being melted to temperature described in its step (1) is 66 DEG C, step is heated to 68 DEG C described in (2), gained O/w emulsion particle diameter is 10 μm, in step (3), mixing speed is adjusted to 800 turns/min, the emulsion that described homogenizing is good is warming up to 65 DEG C, and temperature retention time is 24 hours, and all the other are with embodiment 1.
The index of the organic solvent-free type pyraclostrobin microcapsule suspending agent of following table prepared by embodiment 1-5 and the performance test results:
The each performance indications of table 1. embodiment 1-5 and testing result
Below the preventive effect of product to corps diseases that above-described embodiment obtains is tested, specific as follows:
1, to the preventive effect of cucumber downy mildew
Get the pyraclostrobin microcapsule suspending agent of the embodiment of the present invention 2, do comparative trial with 250g/L pyraclostrobin missible oil (BASF) and clear water, be respectively comparative trial 1 and comparative trial 2, consumption is 120g (a.i.)/hm
2, then after medicine, 7d, 20d add up the preventive effect to cucumber downy mildew respectively.Often organize test and repeat 3 times, average, the results are shown in Table 2.
The preventive effect effect of table 2. embodiment 2 pairs of cucumber downy mildews
Note: in table, a, b, c represent different difference grade respectively
As seen from the above table, after medicine in the preventive effect of 7 days, preparation and the missible oil of the embodiment of the present invention 2 do not have significant difference, but along with the prolongation of time, after medicine 20 days, microcapsule suspending agent of the present invention still maintained higher preventive effect, and the decline of significance appears in missible oil.
2, to the preventive effect of Chinese cabbage anthracnose
Get the pyraclostrobin microcapsule suspending agent of the embodiment of the present invention 3, do comparative trial with 250g/L pyraclostrobin missible oil and clear water, be respectively comparative trial 1 and comparative trial 2, concentration for the treatment of is 100mg/kg, the preventive effect of 7d, 20d statistics to Chinese cabbage anthracnose after medicine, the results are shown in Table 3 respectively.Often group test in triplicate, averages.
The preventive effect effect of table 3. embodiment 3 pairs of Chinese cabbage anthracnose
As seen from the above table, after medicine in the preventive effect of 7 days, invention formulation and missible oil do not have significant difference, but along with the prolongation of time, after medicine 20 days, microcapsule suspending agent of the present invention still maintained higher preventive effect, and the decline of significance appears in missible oil.
3, to the preventive effect of wheat rust
Get 45% pyraclostrobin microcapsule suspending agent of the embodiment of the present invention 4, do comparative trial with 250g/L pyraclostrobin missible oil and clear water, be respectively comparative trial 1 and comparative trial 2, concentration for the treatment of is 150mg/kg, the preventive effect of 7d, 20d statistics to wheat rust after medicine, the results are shown in Table 4 respectively.Often group test in triplicate, averages.
The preventive effect effect of table 4. embodiment 4 pairs of wheat rust
As seen from the above table, after medicine in the preventive effect of 7 days, invention formulation and missible oil do not have significant difference, but along with the prolongation of time, after medicine 20 days, microcapsule suspending agent of the present invention still maintained higher preventive effect, and the decline of significance appears in missible oil.
The explanation of above embodiment just for explaining and technical scheme of the present invention being described, but is not intended to limit the present invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (9)
1. an organic solvent-free type pyraclostrobin microcapsule suspending agent; it is characterized in that, described microcapsule suspending agent percentage by weight is composed as follows: pyraclostrobin 5-60%, cyst material 1-15%, protecting glue 0.1-3%, emulsifier 2-5%, dispersant 2-5%, adjuvant 1-14%, water 10-80%.
2. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 1, it is characterized in that, described protecting glue is polyvinyl alcohol, gelatin, gum Arabic or xanthans;
Described emulsifier is lauryl sodium sulfate, the Nonyl pheno of NP series, alkylphenol-polyethenoxy polyethers and sulphate thereof or phosphoric acid ester, the fatty alcohol-polyoxyethylene ether of AEO series, thermally coupled distillation columns, polycarboxylate, alkylphenol-polyethenoxy formaldehyde condensation products sulphate, alkylphenol polyoxyethylene formaldehyde condensation products sulfate phosphates, styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy polyethenoxy ether, alkyl naphthalene formaldehyde condensate sulfonates, dialkyl succinylsuccinate sulfonated ester, this dish, one or more in tween,
Described dispersant is naphthalenesulfonic acid-formaldehyde condensate, triphenyl vinyl phenol polyethenoxy ether class and derivative eater, fatty alcohol polyethenoxy ether class, alkylphenol polyoxyethylene class, macromolecule EO-PO block copolymer, lignosulfonates, alkylphenol-polyethenoxy formaldehyde condensation products sulphate, alkylphenol polyoxyethylene formaldehyde condensation products sulfate phosphates, styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt, styryl phenol polyethenoxy polyethenoxy ether, alkyl naphthalene formaldehyde condensate sulfonates, macromolecule dredges a dress copolymer of type, one or more in polymerization of carboxylic acid salt.
3. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 1, is characterized in that, described adjuvant is one or more in antifreeze, viscosity modifier, pH adjusting agent, sterilization antiseptic, defoamer.
4. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 3, it is characterized in that, described antifreeze is ethylene glycol, propane diols, glycerine, PEG400, isopropyl alcohol or urea, and described antifreeze consumption is the 3-10% of gross weight;
Described viscosity modifier is the one in xanthans, cellulose ether and derivative thereof, polyethylene glycol, polyvinyl alcohol, aluminium-magnesium silicate, bentonite, kaolin, diatomite, attapulgite, and described viscosity modifier consumption is the 0.05-3% of gross weight;
Described pH acid-base modifier is the one in glacial acetic acid, hydrochloric acid, ammoniacal liquor, monoethanolamine, diethylenetriamine;
Described sterilization antiseptic is the one in potassium sorbate, Sodium Benzoate, formaldehyde, isothiazolinone, and the consumption of described sterilization antiseptic is the 0.1-0.5% of gross weight;
Described defoamer is the one in silicon defoamer, polyethers defoamer, higher alcohols, tributyl phosphate, polysiloxane defoamers, and described defoamer consumption is the 0.2-1.5% of gross weight.
5. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 1, it is characterized in that, described cyst material is carbamide resin.
6. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 5, is characterized in that, described carbamide resin is obtained by isocyanates and polyalcohol or polyamine polymerisation.
7. organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 1, it is characterized in that, described water is deionized water or distilled water.
8. a preparation method for organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 1, comprises the following steps:
(1) make it melt pyraclostrobin heating, being melted to temperature is 65-75 DEG C, adds cyst material monomeric diisocyanate and stirs, and forms oil phase;
(2) in water, add emulsifier and protecting glue in advance, be heated to 65-80 DEG C, stir and be incubated, then add the oil phase that step 1 is pre-configured, high-speed stirred makes its homogenizing, forms stable O/w emulsion;
(3) adjust mixing speed and turn/min to 600-800, the aqueous solution adding cyst material monomeric polycarboxylic amine or polyalcohol carries out polymerisation, is to keep 2-24 hour under the environment of 65-80 DEG C in reaction temperature, makes cyst material solidify encystation;
(4) after cyst material solidification encystation, add pH acid-base modifier, being adjusted to pH value is 6-8, then adds dispersant, adjuvant, stirs and obtains pyraclostrobin microcapsule suspending agent finished product.
9. the preparation method of organic solvent-free type pyraclostrobin microcapsule suspending agent according to claim 8, is characterized in that, the granularity of described microcapsule suspending agent is between 0.5-10um.
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| CN105494327A (en) * | 2015-12-14 | 2016-04-20 | 广西田园生化股份有限公司 | Micro-capsule suspension agent composition with slow-release effect and preparation method thereof |
| CN105961384A (en) * | 2016-06-03 | 2016-09-28 | 安徽广信农化股份有限公司 | Method for preparing pyraclostrobin micro-capsule through re-coagulation method |
| CN106614685A (en) * | 2016-12-26 | 2017-05-10 | 安徽省四达农药化工有限公司 | Micro-capsule suspension agent type triazole bactericide as well as preparation method and application thereof |
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| CN107980770A (en) * | 2017-11-20 | 2018-05-04 | 联合国南通农药剂型开发中心（江苏省农药新剂型及新助剂工程技术研究中心、南通精细化工生产力促进中心） | A kind of microcapsule suspending agent of propargite and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105494327A (en) * | 2015-12-14 | 2016-04-20 | 广西田园生化股份有限公司 | Micro-capsule suspension agent composition with slow-release effect and preparation method thereof |
| WO2017133162A1 (en) * | 2016-02-02 | 2017-08-10 | 南京高正农用化工有限公司 | Trifluralin micro-capsule suspending agent and method for preparing the same |
| CN105961384A (en) * | 2016-06-03 | 2016-09-28 | 安徽广信农化股份有限公司 | Method for preparing pyraclostrobin micro-capsule through re-coagulation method |
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| CN107980770A (en) * | 2017-11-20 | 2018-05-04 | 联合国南通农药剂型开发中心（江苏省农药新剂型及新助剂工程技术研究中心、南通精细化工生产力促进中心） | A kind of microcapsule suspending agent of propargite and its preparation method and application |
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