CN107593740B - The wettable powder and preparation method thereof of Mancozeb and difenoconazole compounding - Google Patents
The wettable powder and preparation method thereof of Mancozeb and difenoconazole compounding Download PDFInfo
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- CN107593740B CN107593740B CN201710952403.XA CN201710952403A CN107593740B CN 107593740 B CN107593740 B CN 107593740B CN 201710952403 A CN201710952403 A CN 201710952403A CN 107593740 B CN107593740 B CN 107593740B
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Abstract
The invention discloses the wettable powders and preparation method thereof of a kind of Mancozeb and difenoconazole compounding, belong to field of pesticide preparation.The wettable powder of above-mentioned Mancozeb and difenoconazole compounding, is made of following materials by weight percentage：Mancozeb 50-60%, difenoconazole 5-10%, sodium thiosulfate 2-5%, sodium salicylate 2-5%, double tridecanol sulfosuccinate sodium 5-8%, polyoxyethylene carboxylate 2-6%, pull open powder 0.5-2%, surplus is diatomite.The wettable powder of the present invention has many advantages, such as that suspensibility is high, wetting time is short, does not lump, good drug efficacy.
Description
Technical field
The present invention relates to pesticide processing technical fields more particularly to a kind of Mancozeb compounded with difenoconazole it is wettable
Property pulvis and preparation method thereof.
Background technology
Mancozeb is a kind of excellent protective fungicide (see structural formula I), belongs to low-toxin farm chemicals.Due to its bactericidal range
Extensively, it is not easy to produce resistance, control effect is substantially better than other same series bactericidal agents, so dosage is always large-tonnage production in the world
Product.Currently, domestic majority composite bactericide is all formulated with Mancozeb processing, manganese, zinc microelement have obviously crop
Rush is strong, production-increasing function, by more than ten years Field information, to prevention pear scab, alternaria leaf spot of apple, vegetable category epidemic disease,
Downy mildew, field crop rust and other effects are notable, can effectively control disease completely without other any fungicide, quality is steady
It is fixed, reliable.
Difenoconazole is wide spectrum systemic fungicide (see formula II), has protection and therapeutic effect, is mainly used for each
Kind anthracnose of crop, leaf spot, powdery mildew, scab and take-all are the triazole type sterilizations for having much development prospect the present age
Agent, 76 DEG C of fusing point, dissolubility (20 DEG C)：Water 3.3mg/L, is soluble in organic solvent.
Existing wettable powder (WP) is with pesticide original medicine, inert filler (being largely bentonite, kaolin etc.) and one
Quantitative auxiliary agent after being adequately mixed crushing in proportion, reaches the dosage form of certain particle size.From in shape, with pulvis without
Difference, but due to adding the auxiliary agents such as wetting agent, dispersant, can be readily wetted by water after being added in water, disperse, form suspension,
Sprayable application.Compared with missible oil, wettable powder production cost is low, can use paper bag or plastic bag packaging, and storage and transportation is convenient, pacifies
Entirely, packaging material is easier to handle；Importantly, wettable powder does not use solvent and emulsifier, it is safer to plant,
It is not likely to produce poisoning, it is environmentally safe, it is used before fruit bagging, can avoid stimulation of the organic solvent to fruit face.China produces
Wettable pesticide powder has the history of decades, but Wettable pesticide powder caking, suspensibility is low, wetting time length is asked
Topic annoyings always vast pesticide producing enterprise, and most producers are often due to the presence of the above problem makes the stability of pesticide
Difference adds anti-caking agent white carbon in formula, but the effect is unsatisfactory, and drug effect is not played well, and wastes active compound and auxiliary agent, increases
Agriculture production cost is added.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of wettable powder of Mancozeb and difenoconazole compounding
And preparation method thereof.Mancozeb prepared by the present invention and the wettable powder of difenoconazole compounding have anti-caking, wetting
Soon, the advantages that suspensibility is high.
In order to solve the above technical problems, present invention offer technical solution is as follows：
A kind of wettable powder of Mancozeb and difenoconazole compounding, is made of following materials by weight percentage：
Preferably, the wettable powder of Mancozeb of the invention and difenoconazole compounding, by following weight percentage
Raw material forms：
It is furthermore preferred that the wettable powder of the Mancozeb of the present invention and difenoconazole compounding, by following weight percentage
It is formed than raw material：
The present invention also provides the preparation method of a kind of above-mentioned Mancozeb and the wettable powder of difenoconazole compounding, packets
It includes：
Step 1：Diatomite is uniformly mixed with polyoxyethylene carboxylate, adds sodium thiosulfate, sodium salicylate, double
Tridecanol sulfosuccinate sodium is uniformly mixed；
Step 2：Mixture, Mancozeb, difenoconazole and pull open powder in step 1 is uniformly mixed, mixture is obtained
Material；
Step 3：Mixed material is refined, 45 μm of testing sieves are crossed, obtains Mancozeb and difenoconazole compounding
Wettable powder.
It is well known that wettable powder during storage to lump phenomena such as, during being dispersed in water,
The problems such as it is long that there are wetting times, and suspensibility is low.
For the present invention using sodium thiosulfate and sodium salicylate as anti-caking auxiliary agent, the two has prodigious wettability power, inhales
It is attached to diatomite surface, can be reduced diatomite in the case where competing moisture absorption with diatomite and lump caused by hygroscopicity and incline
To.The present invention is by being added nonionic surfactant polyoxyethylene carboxylate and anion surfactant double 13 simultaneously
Alcohol sulfosuccinate sodium, wherein double tridecanol sulfosuccinate sodium have two hydrophobic chains, can more preferably be inhaled in particle surface
It is attached, while its hydrophilic radical is more, is conducive to quickly wetting and dispersing in water；Polyoxyethylene carboxylate has certain space bit
, there is " steric hindrance " repulsive force, particle aggregation can be effectively prevent in resistance.
In conclusion beneficial effects of the present invention are shown as：
1) for the present invention using sodium thiosulfate and sodium salicylate as anti-caking auxiliary agent, the two has prodigious wettability power,
It is adsorbed on diatomite surface, can be reduced diatomite in the case where competing moisture absorption with diatomite and lump caused by hygroscopicity
Tendency；
2) while using double tridecanol sulfosuccinate sodium and polyoxyethylene carboxylate as surfactant, shorten wetting
Time improves suspensibility.
Specific implementation mode
To keep the embodiment of the present invention technical problems to be solved, technical solution and advantage clearer, below in conjunction with
Specific embodiment is described in detail.But the present invention is limited to absolutely not these examples.As described below is only the preferable implementation of the present invention
Example is only used to explain the present invention, therefore can not be interpreted as the limitation of the scope of the claims of the present invention.It should be pointed out that all
The all any modification, equivalent and improvement etc. done within the spirit and principles in the present invention should be included in the guarantor of the present invention
Within the scope of shield.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Embodiment 1
(1) diatomite is uniformly mixed according to the formula of embodiment 1 in table 1 with polyoxyethylene carboxylate, adds sulphur
Sodium thiosulfate, sodium salicylate, double tridecanol sulfosuccinate sodium are uniformly mixed；
(2) mixture, Mancozeb, difenoconazole and the pull open powder in step 1 are uniformly mixed, obtain mixed material；
(3) mixed material is refined, cross 45 μm of testing sieves, obtain Mancozeb compounded with difenoconazole it is wettable
Property pulvis.
Table 1：The wettable powder formula table of Mancozeb and difenoconazole compounding
Unit：Kilogram
Embodiment 2
Raw material is weighed by 1 corresponding embodiment of table, 2 data, is prepared as described in Example 1.
Embodiment 3
Raw material is weighed by 1 corresponding embodiment of table, 3 data, is prepared as described in Example 1.
Comparative example 1
1 data of comparative example are corresponded to by table 1 and weigh raw material, are prepared as described in Example 1.
Comparative example 2
2 data of comparative example are corresponded to by table 1 and weigh raw material, are prepared as described in Example 1.
Comparative example 3
3 data of comparative example are corresponded to by table 1 and weigh raw material, are prepared as described in Example 1.
Comparative example 4
4 data of comparative example are corresponded to by table 1 and weigh raw material, are prepared as described in Example 1.
Comparative example 5
Sodium thiosulfate in embodiment 3 is replaced with into sodium citrate, sodium salicylate is replaced with into methenamine, remaining reagent
And dosage is same as Example 3, is prepared as described in Example 1.
Comparative example 6
Double tridecanol sulfosuccinate sodium in embodiment 3 are substituted for diisooctyl succinate sodium sulfonate, remaining examination
Agent and dosage are same as Example 3, are prepared as described in Example 1.
Embodiment 4
Raw material is weighed by 1 corresponding embodiment of table, 4 data, is prepared as described in Example 1.
Embodiment 5
Raw material is weighed by 1 corresponding embodiment of table, 5 data, is prepared as described in Example 1.
Wettable powder prepared by above-described embodiment and comparative example is according to standard《GB/T1600-2001 pesticide moisture is surveyed
Determine method》Moisture is measured, according to《GB/T5451-2001 pesticide wettable wettability determination methods》When measuring wetting
Between, according to《GB/T14825-2006 agricultural-chemical suspension rate assay methods》Its suspensibility is surveyed, specific data see the table below 2.
Table 2
| Serial number | Suspensibility/% | Wetting time/s | Moisture/% | Appearance |
| Embodiment 1 | 82.6 | 61 | 1.6 | Loose powder |
| Embodiment 2 | 85.4 | 54 | 1.1 | Loose powder |
| Embodiment 3 | 90.2 | 41 | 0.8 | Loose powder |
| Comparative example 1 | 73.6 | 66 | 2.8 | Loose powder |
| Comparative example 2 | 76.1 | 68 | 2.6 | Loose powder |
| Comparative example 3 | 69.8 | 73 | 3.2 | Loose powder |
| Comparative example 4 | 51.6 | 170 | 0.9 | Loose powder |
| Comparative example 5 | 79.2 | 66 | 2.4 | Loose powder |
| Comparative example 6 | 80.2 | 71 | 1.1 | Loose powder |
| Embodiment 4 | 86.7 | 50 | 1.2 | Loose powder |
| Embodiment 5 | 84.5 | 57 | 1.5 | Loose powder |
As shown in Table 2, the wettable powder that prepared by the present invention has higher suspensibility, while wetting time is short, moisture
The advantages that content is few.Compared with comparative example 4, suspensibility is higher, it may be possible to the double tridecanol sulfosuccinics used due to the present invention
Acid esters sodium has two hydrophobic chains, can more preferably be adsorbed in particle surface, while its hydrophilic radical is more, is conducive to quickly in water
Wetting and dispersing largely shortens wetting time with polyoxyethylene carboxylate collective effect, improves suspensibility.It will be double
Tridecanol sulfosuccinate sodium is substituted for diisooctyl succinate sodium sulfonate (comparative example 6), and suspensibility reduces, this is because
The surfactant of different chain length has an impact suspending agent suspendability, suspension stability is caused to reduce.With comparative example 1-3 phases
Than the sodium thiosulfate or/and sodium salicylate that the present invention contains, the two is soluble easily in water, increases the close of medium to a certain extent
Degree, improves its suspendability.
After above-described embodiment and the wettable powder storage at normal temperature of comparative example 1 month, observation finds the product of comparative example 3
There is caking phenomenon；After continuing storage 3 months, there is caking phenomenon in the product of comparative example 1-2；After storage 1 year, comparative example 5
There is caking phenomenon in product, and embodiment 1-5 and the wettable powder storage at normal temperature of comparative example 42 years, and no caking phenomenon generates.
It follows that there is stronger hygroscopic effect, the two synergistic effect can effectively prevent pesticide for sodium thiosulfate and sodium salicylate
The generation of wettable powder caking phenomenon, and other indexs significantly improve, such as suspensibility height, wetting time is short, and powder is loose.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (4)
1. the wettable powder of a kind of Mancozeb and difenoconazole compounding, which is characterized in that former by following weight percentage
Material composition：
2. the wettable powder of Mancozeb according to claim 1 and difenoconazole compounding, which is characterized in that under
State weight percent raw material composition：
3. the wettable powder of Mancozeb according to claim 2 and difenoconazole compounding, which is characterized in that under
State weight percent raw material composition：
4. according to the preparation side of claim 1-3 any Mancozeb and the wettable powder of difenoconazole compounding
Method, which is characterized in that including：
Step 1：Diatomite is uniformly mixed with polyoxyethylene carboxylate, adds sodium thiosulfate, sodium salicylate, double 13
Alcohol sulfosuccinate sodium is uniformly mixed；
Step 2：Mixture, Mancozeb, difenoconazole and pull open powder in step 1 is uniformly mixed, mixed material is obtained；
Step 3：Mixed material is refined, cross 45 μm of testing sieves, obtain Mancozeb compounded with difenoconazole it is wettable
Property pulvis.
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