CN110881470A - Suspending agent composition, suspending agent, and preparation process and application thereof - Google Patents
Suspending agent composition, suspending agent, and preparation process and application thereof Download PDFInfo
- Publication number
- CN110881470A CN110881470A CN201910926825.9A CN201910926825A CN110881470A CN 110881470 A CN110881470 A CN 110881470A CN 201910926825 A CN201910926825 A CN 201910926825A CN 110881470 A CN110881470 A CN 110881470A
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- parts
- suspending agent
- suspension
- vegetable oil
- benzylaminopurine
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- 239000000375 suspending agent Substances 0.000 title claims abstract description 82
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 28
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 33
- 239000008158 vegetable oil Substances 0.000 claims abstract description 33
- PRPINYUDVPFIRX-UHFFFAOYSA-N 1-naphthaleneacetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CC=CC2=C1 PRPINYUDVPFIRX-UHFFFAOYSA-N 0.000 claims abstract description 28
- NWBJYWHLCVSVIJ-UHFFFAOYSA-N N-benzyladenine Chemical compound N=1C=NC=2NC=NC=2C=1NCC1=CC=CC=C1 NWBJYWHLCVSVIJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 29
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 230000001804 emulsifying effect Effects 0.000 claims description 16
- QYDYPVFESGNLHU-KHPPLWFESA-N methyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC QYDYPVFESGNLHU-KHPPLWFESA-N 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 15
- QYDYPVFESGNLHU-UHFFFAOYSA-N elaidic acid methyl ester Natural products CCCCCCCCC=CCCCCCCCC(=O)OC QYDYPVFESGNLHU-UHFFFAOYSA-N 0.000 claims description 14
- 229940073769 methyl oleate Drugs 0.000 claims description 12
- 239000008213 purified water Substances 0.000 claims description 11
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- LVGKNOAMLMIIKO-UHFFFAOYSA-N Elaidinsaeure-aethylester Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC LVGKNOAMLMIIKO-UHFFFAOYSA-N 0.000 claims description 7
- 230000002528 anti-freeze Effects 0.000 claims description 7
- OOCMUZJPDXYRFD-UHFFFAOYSA-L calcium;2-dodecylbenzenesulfonate Chemical compound [Ca+2].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O.CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O OOCMUZJPDXYRFD-UHFFFAOYSA-L 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
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- 229940093471 ethyl oleate Drugs 0.000 claims description 5
- 239000004359 castor oil Substances 0.000 claims description 4
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
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- KWKXNDCHNDYVRT-UHFFFAOYSA-N dodecylbenzene Chemical group CCCCCCCCCCCCC1=CC=CC=C1 KWKXNDCHNDYVRT-UHFFFAOYSA-N 0.000 description 2
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- 238000007710 freezing Methods 0.000 description 2
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
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- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 2
- 239000005971 1-naphthylacetic acid Substances 0.000 description 1
- 239000005972 6-Benzyladenine Substances 0.000 description 1
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 1
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- VGKONPUVOVVNSU-UHFFFAOYSA-N naphthalen-1-yl acetate Chemical compound C1=CC=C2C(OC(=O)C)=CC=CC2=C1 VGKONPUVOVVNSU-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
- A01N25/06—Aerosols
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/10—Aromatic or araliphatic carboxylic acids, or thio analogues thereof; Derivatives thereof
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a suspending agent composition, a suspending agent, a preparation process and application thereof. The suspending agent composition comprises 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 10-20 parts of vegetable oil. The suspending agent composition has good adhesion with the leaves of corresponding pesticide application plants, and can ensure that fog drops formed by spraying in the flying prevention process are not easy to volatilize and drift.
Description
Technical Field
The invention relates to the field of suspending agents, in particular to a suspending agent composition, a suspending agent, and a preparation process and application thereof.
Background
The flying prevention is an effective method for suppressing the insect population density in a large area and in a short period of time by spraying pesticides through a general airplane, and has the advantages which are not comparable to other conventional measures. Originally, with large aircraft, along with the rapid development of unmanned aerial vehicle technique in recent years, the unmanned aerial vehicle flies the new technique of preventing that flies of preventing has appeared, and unmanned aerial vehicle flies to prevent and utilizes small-size remote control unmanned aerial vehicle, carries out the low latitude spraying of pesticide, realizes the prevention and cure of plant diseases and insect pests to crops.
Unmanned aerial vehicle plant protection is called flying defense for short, and low crops such as field crops are very suitable for unmanned aerial vehicle plant protection. The total operation area of the Chinese flying defense system in 2018 breaks through 3 hundred million mu times, which indicates that the development of unmanned aerial vehicle plant protection has entered a brand new era. Unmanned aerial vehicle plant protection and traditional spraying contrast have apparent difference, and the difference is shown in table 1 below:
TABLE 1
| Spray mode | Water consumption per mu | Average diameter of mist droplets | Height of spray |
| Artificial spray | 30-60 liters | 400 to 600 μm | 30 cm |
| Mechanical spray | 10-30 |
200 to 400 |
50 cm |
| Unmanned aerial vehicle spraying | 1 to 2 |
80 to 200 μm | 150-200 cm |
It can be seen from the above table that the unmanned aerial vehicle spraying has the characteristics of extremely little water consumption, extremely little fog drop immediately, high spraying height, and these characteristics will produce the following problems under outdoor changeable climatic conditions: the small fog drops have small inertia, are easily influenced by wind in the long-distance descending process and are easy to drift; in addition, the specific surface area of the small fog drops is large, the evaporation speed is greatly accelerated in a high-temperature and dry environment, and effective components are separated out after water is dissipated to form solid suspended matters which are difficult to settle on the surfaces of crops.
The traditional pesticide product is directly used for flying prevention, which can cause the fog drops to drift and evaporate and dissipate in the air, and reduce the pesticide effect and the pesticide utilization rate. The existing pesticide preparation suitable for flying prevention mainly takes water-based preparations such as suspending agents, suspending agents and the like as main materials. In a natural environment, water saturated steam is higher than that of an organic solvent, most of water-based preparations take water as a filler, and the water-based preparations have high evaporation speed and high proportion of small fog drops when being used on a flying defense, so that the problems of easy volatilization and easy drift can be caused.
In addition, the surface tension of water is higher and far higher than the interface tension of common crop blades, most of fog drops of a water-based preparation are mainly water, the surface tension of water is higher, and the fog drops cannot be adhered to the surfaces of the blades due to the overhigh dynamic surface tension at the moment of contacting the surfaces of the blades, so that a large amount of rebound loss can be caused. Therefore, the spray droplets of the water-based preparation are difficult to wet the leaves of the crops, so that the rebound and loss of the droplets are increased, the retention of the pesticide on the surfaces of the leaves of the crops is reduced, and the pesticide effect and the pesticide utilization rate are reduced.
At present, the matched pesticide preparation for unmanned aerial vehicle plant protection still continues to use the traditional pesticide preparation, and is not improved aiming at the problems mentioned above, so that the pesticide effect is hardly exerted, the effect that effective components are difficult to settle on the surface of crops is finally influenced, and the pesticide effect and the pesticide utilization rate are reduced. Therefore, in the existing flight and defense operation, the adhesion of the compound preparation is poor, and the problems that fog drops of the preparation are easy to volatilize and drift in the application process are still to be solved.
Disclosure of Invention
The invention provides a suspending agent composition, a suspending agent, a preparation process and application thereof, aiming at overcoming the defects of poor adhesion of a compound preparation, volatile fog drops and easy drifting in a flight control application process in the prior art.
The invention firstly provides a suspending agent composition, which adopts the following technical scheme: the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 10-20 parts of vegetable oil.
Preferably, the vegetable oil is an alkylated vegetable oil.
More preferably, the alkylated vegetable oil is one of methyl oleate and ethyl oleate.
Secondly, providing a suspending agent, adopting the following technical scheme: comprising a suspension composition as described in any of the above.
Preferably, the emulsion also comprises 3-8 parts of emulsifying dispersant by mass. The emulsifying dispersant is one or more of polyoxyethylene octyl phenol ether, polyoxyethylene sorbitan monooleate, castor oil polyoxyethylene ether and calcium dodecyl benzene sulfonate.
More preferably, the anti-freezing agent also comprises 3-5 parts by mass of the anti-freezing agent. The antifreeze agent is preferably ethylene glycol.
More preferably, the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 10-20 parts of alkylated vegetable oil, 3-8 parts of emulsifying dispersant, 3-5 parts of antifreeze, 0.1-0.3 part of xanthan gum and water for supplementing to 100 parts.
More preferably, the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 20 parts of methyl oleate, 3 parts of calcium dodecyl benzene sulfonate, 3 parts of sorbitan monooleate, 5 parts of ethylene glycol, 0.1 part of xanthan gum and water in balance to 100 parts.
The preparation method of the suspending agent is provided again, and comprises the following steps:
s1, 6-benzylaminopurine and naphthylacetic acid are proportioned and added with emulsifying dispersant and a proper amount of purified water;
s2 stirring and dispersing 6-benzylaminopurine, naphthylacetic acid, an emulsifying dispersant and purified water;
s3, sanding the pre-dispersed suspending agent stirred in the step S2;
s4, adding methyl oleate, glycol serving as an antifreeze and xanthan gum into the sanded suspending agent, and adding the rest purified water to stir and disperse to obtain a finished suspending agent.
The application of the suspending agent composition or the suspending agent in the flying defense is further provided.
The invention has the beneficial effects that:
1. the suspending agent composition has good adhesion with the leaves of corresponding pesticide application plants, and can ensure that fog drops formed by spraying in the flying prevention process are not easy to volatilize and drift;
2. the alkylated vegetable oil of the suspending agent is added into a suspending agent system, and when the suspending agent is used by adding water and the fog drops are formed, the alkylated vegetable oil is partially demulsified and rapidly migrates to the surfaces of the fog drops to form a hydrophobic oil film so as to prevent the evaporation and the dissipation of water in the fog drops;
3. the alkylated vegetable oil, the emulsifier and the effective components of the suspending agent are crosslinked with each other to form emulsion with certain viscosity and elasticity, and under the same air friction action, the viscosity and the elasticity of a liquid film can weaken the action force of oscillation and tearing, so that the formation of droplets can be reduced, and the proportion of the droplets (below 100 micrometers) is reduced;
4. the alkylated vegetable oil long carbon chain part of the suspending agent has the function of dissolving the wax layer on the surface of the leaf, and the wax layer is shrunk and agglomerated and mutually crosslinked by dissolving the wax layer, so that the adhesion is promoted.
Drawings
FIG. 1 is a schematic diagram showing the relationship between droplet size and drift distance;
FIG. 2 is a flow chart of a method of making a suspending agent according to a preferred embodiment of the present invention;
FIG. 3 is a diagram of the droplet size distribution of a conventional suspending agent in an anti-drift performance measurement experiment;
FIG. 4 is a diagram of the droplet size distribution of the suspending agent of the present invention in an anti-drift performance measurement experiment;
FIG. 5 is a spray snapshot of the droplet size of a conventional suspending agent in an anti-drift performance determination experiment;
FIG. 6 is a spray snapshot of the droplet size of the suspension of the present invention in an anti-drift performance determination experiment;
FIG. 7 is a fluorescence color chart of the retention of liquid medicine before being flushed with clear water in the experiment for measuring the liquid medicine adhesiveness;
FIG. 8 is a fluorescent color chart of the retention of a medicinal liquid after washing with clear water in a medicinal liquid adhesion measurement experiment.
Detailed Description
The drawings will be further described first
FIG. 7 shows the conventional suspending agent on the left and the formulation of the present invention on the right; the conventional suspending agent is shown on the left side of FIG. 8, and the formulation of the present invention is shown on the right side.
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.
The invention aims to overcome the defects that the existing compound preparation has poor adhesion with the leaves of corresponding pesticide application plants, and fog drops formed by spraying in the flying prevention process are volatile and easy to drift, and firstly provides a suspending agent composition, which adopts the following technical scheme: the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 10-20 parts of vegetable oil.
Benzylaminopurine, chemical name 6- (N-benzyl) amino glance sideways at (or 6-benzyl adenine), is abbreviated as 6-BA, Baumelin, and is a purine synthetic plant growth regulator. The raw pesticide is white powder, the melting point is 234-235 ℃, the solubility in water (20 ℃) is 60mg/L, and the raw pesticide is insoluble in most organic solvents, dimethylformamide and dimethyl sulfoxide. It is stable in acid, alkali and neutral aqueous solution, and is stable to light and heat. Mainly used for promoting cell division; promoting differentiation of non-differentiated tissues; promoting cell enlargement and growth; promoting the germination of seeds; inhibiting chlorophyll decomposition, and delaying leaf aging; breaking the apical dominance and promoting the growth of lateral buds; promoting flower bud formation and flowering; promoting fruit setting and fruit growth, etc.
The naphthylacetic acid, chemical name of which is 1-naphthylacetic acid, α -naphthylacetic acid, is NAA, is an organic naphthalene plant growth regulator, the melting point is 134-135 ℃, the solubility is 420mg/L (20 ℃) in water, 55g/L (26 ℃) of dimethylbenzene, 10.6g/L (26 ℃), the carbon tetrachloride is easily soluble in alcohol and acetone, is soluble in ether and chloroform, is soluble in hot water and insoluble in cold water, the salt has good water solubility and good structure stability and storage resistance, the naphthylacetic acid can be absorbed by leaves, stems and roots and then is conducted to an action part, the physiological action and action mechanism of the naphthylacetic acid are similar to indoleacetic acid, the naphthylacetic acid stimulates cell division and tissue differentiation, promotes ovary enlargement, induces parthenocarpy fructification, forms seedless fruits, promotes flowering, inhibits cellulase within a certain concentration range, prevents fallen flowers and fallen fruits, induces the formation of adventitious roots of branches, accelerates the cuttage of the trees, promotes the growth of the plants at low concentration, and causes a large amount of endogenous ethylene at high concentration, thereby achieving the effects of dwarfing and ripening.
In order to enable the suspending agent to achieve the effect of evaporation resistance, vegetable oil is added into the suspending agent, and the saturated vapor pressure at normal temperature is lower than that of water due to the hydrophobic property of the vegetable oil. The vegetable oil is added into the suspending agent system, and when the suspending agent system is used by adding water and the fog drops are formed, the vegetable oil is partially demulsified and rapidly migrates to the surfaces of the fog drops to form a layer of hydrophobic oil film, so that the evaporation and the dissipation of the water in the fog drops are prevented.
The vegetable oil can also strengthen the adhesiveness of the suspending agent and the leaves, the surfaces of the leaves are provided with a hydrophobic protective film consisting of a long carbon chain wax layer, according to the similar intermiscibility principle, the long carbon chain part of the vegetable oil has the function of dissolving the wax layer, and the vegetable oil is shrunk and agglomerated and is mutually crosslinked through dissolving the wax layer to promote the adhesion. Meanwhile, cell membranes on the surfaces of the leaves are exposed, so that effective components in the fog drops can contact the cell membranes more quickly and are further quickly absorbed by penetration, and the fog drops conduct and play a role in the plant body.
The vegetable oil is preferably alkylated in order to achieve better evaporation resistance and promote adhesion to the leavesAnd (3) vegetable oil. The alkylated vegetable oil is one of methyl oleate and ethyl oleate. The alkylated vegetable oil is natural and has saturated vapor pressure at normal temperature and low water content (25 deg.C, saturated vapor pressure of about 4 × 10-5mmHg, about 24mmHg water). The alkylated vegetable oil is added into a suspending agent system and is mixed with water for use, and during the formation process of fog drops during spraying, the alkylated vegetable oil is partially demulsified and rapidly migrates to the surfaces of the fog drops to form a hydrophobic oil film to prevent evaporation and dissipation of water in the fog drops. And the alkylated vegetable oil long carbon chain part can be better crosslinked with the long carbon chain wax layer on the leaf to promote adhesion.
The suspending agent composition is prepared into a suspending agent. And comprises 3-8 parts by mass of an emulsifying dispersant. The emulsifying dispersant is one or more of polyoxyethylene octyl phenol ether, polyoxyethylene sorbitan monooleate, castor oil polyoxyethylene ether and calcium dodecyl benzene sulfonate.
In order to achieve better anti-drift effect, an emulsifying dispersant is added into the suspending agent. The relationship graph of droplet size and drift distance is shown in figure 1, the traditional water-based preparation is mixed with water for spraying, a liquid film is formed firstly in the process of spraying liquid medicine from a spray head, and the liquid film vibrates and tears to form small droplets due to air friction in the descending process of the liquid film. When the alkylated vegetable oil is added into a suspending agent system, the alkylated vegetable oil, the emulsifier and the effective components are mutually crosslinked to form emulsion with certain viscosity and elasticity, and under the same air friction action, the viscosity and the elasticity of a liquid film can weaken the action force of oscillation and tearing, so that the formation of small fog drops can be reduced, and the proportion of the small fog drops (below 100 micrometers) is reduced.
In order to ensure that the suspending agent can be normally used in low-temperature areas, the suspending agent also comprises 3-5 parts by mass of an antifreeze agent. The antifreeze agent is preferably ethylene glycol.
The optimized suspending agent has a better mixture ratio and comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 10-20 parts of alkylated vegetable oil, 3-8 parts of emulsifying dispersant, 3-5 parts of antifreeze, 0.1-0.3 part of xanthan gum and water for supplementing to 100 parts.
Most preferably, the composition comprises the following components in parts by mass: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 20 parts of methyl oleate, 3 parts of calcium dodecyl benzene sulfonate, 3 parts of sorbitan monooleate, 5 parts of ethylene glycol, 0.1 part of xanthan gum and water in balance to 100 parts.
Example 1
A suspension composition comprises 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 20 parts of methyl oleate.
Example 2
A suspension composition comprises 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 20 parts of ethyl oleate.
Example 3
As shown in fig. 2, a method for preparing a suspending agent comprises the following steps:
s1, 6-benzylaminopurine and naphthylacetic acid are proportioned and added with emulsifying dispersant and a proper amount of purified water;
s2 stirring and dispersing 6-benzylaminopurine, naphthylacetic acid, an emulsifying dispersant and purified water;
s3, sanding the pre-dispersed suspending agent stirred in the step S2;
s4, adding methyl oleate, glycol serving as an antifreeze and xanthan gum into the sanded suspending agent, and adding the rest purified water to stir and disperse to obtain a finished suspending agent.
Example 4
A suspending agent is prepared by the preparation method of example 3, and three groups of suspending agents are prepared according to the component proportions listed in Table 2:
table 2 formulations table 1
Example 5
A suspending agent is prepared by the preparation method of example 3, and three groups of suspending agents are prepared according to the component proportions listed in Table 3:
table 3 formula table 2
| Components | Formulation 4 | |
Formulation 6 |
| 6- |
2％ | 4％ | 6％ |
| Naphthylacetic acid | 3％ | 6％ | 9％ |
| Oleic |
20％ | 20％ | 20％ |
| Dodecyl benzene ring acid calcium salt | 2％ | 2％ | 2％ |
| Polyoxyethylene octyl phenol ether | 4％ | 4％ | 4 |
| Ethylene glycol | |||
| 5％ | 5％ | 5％ | |
| Xanthan gum | 0.1％ | 0.1％ | 0.1％ |
| Purified water | Make- |
Make- |
Make- |
Example 6
A suspending agent is prepared by the preparation method of example 3, and three groups of suspending agents are prepared according to the component proportion listed in Table 4:
table 4 formula table 3
Example 7
A suspending agent is prepared by the preparation method of example 3, and three groups of suspending agents are prepared according to the component proportion listed in Table 5:
table 5 formula table 4
| | Formulation | 10 | Formulation 11 | |
| 6- |
2％ | 4％ | 6％ | |
| Naphthylacetic acid | 3％ | 6％ | 9％ | |
| Oleic |
20％ | 20％ | 20％ | |
| Dodecyl benzene ring acid calcium salt | 3％ | 3％ | 3％ | |
| Castor oil polyoxyethylene ether | 4％ | 4％ | 4 | |
| Ethylene glycol | ||||
| 5％ | 5％ | 5％ | ||
| Xanthan gum | 0.1％ | 0.1％ | 0.1％ | |
| Purified water | Make- |
Make- |
Make- |
Evaporation rate test experiment
And (3) detecting the experimental object: suspending agent of various component ratios in examples 4 to 7
The detection experiment method comprises the following steps:
a qualitative 11cm diameter filter paper with copper wire loops was weighed as M0 by using a filter paper hanging method. 0.8-1.0 ml of 100 times of diluent of the suspending agent is taken by an injector and evenly dropped on qualitative filter paper to ensure that the filtrate is completely wetted, and the M1 is obtained by immediately weighing. The mixture is suspended in a constant temperature box at the temperature of 30 +/-1 ℃, taken out after 20min and weighed, and is recorded as M2. All weights were taken to remove the mass of the copper wire loop beforehand and the evaporation rate of the liquid medicine was calculated. A 100-fold dilution of a conventional suspension without added methyl formate was used as a control. The evaporation rate test was performed on the suspending agents of examples 4-7 at various component ratios.
And (3) data analysis: the evaluation is carried out according to the calculated evaporation rate of the liquid medicine, the evaporation rate is strong when the evaporation rate is more than 30 percent, medium when the evaporation rate is 10-30 percent, and weak when the evaporation rate is less than 10 percent. Namely, the evaporation resistance rate is weak when the evaporation resistance rate is less than 70%, medium when the evaporation resistance rate is 70-90%, and strong when the evaporation resistance rate is more than 90%, 9 groups of parallel samples are set, and the average value is taken as the evaporation resistance rate.
The evaporation rate is 1- (M2-M0)/(M1-M0). times.100%
Evaporation resistance rate 1-evaporation rate
TABLE 6 test results of evaporation Rate resistance
| Recipe number | Rate of evaporation | Evaporation resistance rate |
| 1 | 15.43％ | 84.57 |
| 2 | 15.56％ | 84.44％b |
| 3 | 15.19％ | 84.81％b |
| 4 | 15.16％ | 84.84 |
| 5 | 16.52％ | 83.48％b |
| 6 | 16.12％ | 83.88％b |
| 7 | 15.05％ | 84.95％b |
| 8 | 15.49％ | 84.51％b |
| 9 | 14.35％ | 85.65 |
| 10 | 15.52％ | 84.48％b |
| 11 | 14.62％ | 85.38 |
| 12 | 14.57％ | 85.43％b |
| Control agent | 94.32％ | 5.68％a |
And (3) measuring results: it can be seen that the anti-evaporation rate effect of the suspending agent in the formula of the invention is far better than that of the common suspending agent, and the suspending agent shows good anti-evaporation effect. Statistically, the English lowercase letters are used for representing the significant difference of the data, the letters are the same and have no significant difference, and the letters are different for representing the significant difference of the data.
Experiment for measuring anti-drift performance
1. Indoor testing: droplet size detection
The detection method comprises the following steps: the 12 formulation samples of examples 4-7 were diluted 100 times and added to an electric sprayer with a nozzle that was widely used by a plant unmanned aerial vehicle
XR11001 pressure fan nozzle, spray pressure 0.275MPa (40psi), room temperature 28 ℃. The particle size distribution diagram of the fog drops is detected by using an Oumecke spray particle size analyzer, the proportion of the particle size of the fog drops to be less than 100 micrometers (referring to the American EPA anti-drift test standard) and the span of the fog drops (the smaller the span, the centralized particle size distribution of the fog drops and the better anti-drift effect) are calculated, the average value is obtained by 6 times of measurement, and the significance difference is calculated. The droplet span calculation formula is as follows:
droplet span (DV 90-DV 10)/DV50
TABLE 7 measurement results of Drift resistance
Fig. 3 to 6 are a specific droplet size distribution diagram and a spray snapshot obtained in the anti-drift performance measurement experiment. The figure shows that the suspending agent of the invention can effectively reduce the proportion of small fog drops, reduce the span of the fog drops, increase the size of the fog drops and show good anti-drifting effect.
Measurement experiment of liquid medicine adhesion
1. The experimental method comprises the following steps: fluorescence color development method
In the first step, a common suspending agent is prepared, 100 times of diluent of the suspending agent of the invention of the embodiment 4 to 7 is used, then 1 percent of fluorescent whitening agent is added, and the mixture is stirred evenly for standby. And secondly, taking the circular leaves with the diameter of 5 cm at the same positions on the banana leaves for dip dyeing the liquid medicine. And thirdly, respectively placing the leaves in the diluent for soaking for 10 seconds, airing for 5 minutes, and placing under an ultraviolet lamp for irradiation. And fourthly, respectively soaking the blades in clear water for 1 minute, simulating rain wash, taking out, and placing under an ultraviolet lamp for irradiation. The retention effect of the effective components on the blades after being washed by clean water is shown by utilizing the principle that the fluorescent whitening agent shows blue under the irradiation of an ultraviolet lamp. And fifthly, completely eluting the liquid medicine on the leaves, measuring the retention of the fluorescent whitening agent on the leaves by adopting an internal standard method after the volume is fixed by a volumetric flask, and then converting the retention into the retention and the adhesion of the preparation, wherein the calculation formula is as follows:
the sticking rate (treatment group retention amount-control agent retention amount)/control agent retention amount
FIGS. 7 and 8 are fluorescence color charts showing the retention of the drug solution. FIG. 7 is a fluorescent color chart of the retention of liquid medicine before rinsing with clear water, the left side is a common suspending agent, and the right side is the suspending agent of the present invention. FIG. 8 is a fluorescent color chart of the retention of the liquid medicine after being washed with clear water, the left side is the ordinary suspending agent, and the right side is the suspending agent of the invention. White indicates the area where the active ingredient is located.
And (3) measuring results: the retention of the suspending agent in the formula of the invention on banana leaves is far better than that of a common suspending agent, the suspending agent shows good adhesion, the pesticide utilization rate can be effectively improved, and the pesticide loss is reduced.
TABLE 9 formulation hold-up results
| Recipe number | Retention of the preparation (mg/cm)2) | Adhesion rate (larger better) |
| 1 | 2.06ab | 2.07 |
| 2 | 2.01ab | 2.00 |
| 3 | 2.18a | 2.25 |
| 4 | 2.03ab | 2.03 |
| 5 | 2.15a | 2.21 |
| 6 | 2.04ab | 2.04 |
| 7 | 2.13a | 2.18 |
| 8 | 2.05ab | 2.06 |
| 9 | 2.09b | 2.12 |
| 10 | 2.02ab | 2.01 |
| 11 | 2.11ab | 2.15 |
| 12 | 2.10ab | 2.13 |
| Contrast drugAgent for treating cancer | 0.67c | — |
Experiment of field drug effect
Test site: sichuan province, Jianyang city, Xiangle village. Variety: chuanmai 82. Planting conditions are as follows: the row width is 20 cm and the pit spacing is 20 cm.
The preparations listed in the fourth embodiment to the seventh embodiment are selected, the preparations are sprayed for use in the booting period of wheat according to the pesticide field efficacy test criteria, meanwhile, a control formula control group without methyl oleate is selected, clear water is used as a blank control group, all the preparations are harvested 40 days after the pesticide application, the per mu yield of the wheat is calculated, and meanwhile, the yield increase rate is calculated, and the results are shown in table 10. The yield increase rate calculation formula is as follows:
yield increase is (processed mu yield-blank control mu yield)/blank control mu yield multiplied by 100 percent
TABLE 10 results of field efficacy test
In summary, the above tests prove that the flowable suspending agent prepared by preparing 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid or naphthylacetate (based on naphthylacetic acid), 10-20 parts of methyl oleate and ethyl oleate, and 3-8 parts of emulsifying dispersant according to a traditional suspending agent method can effectively solve the problems of fog drop evaporation, drifting and adhesion. Can be used to unmanned aerial vehicle plant protection.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. A suspension composition characterized by: the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid and 10-20 parts of vegetable oil.
2. A suspension composition according to claim 1, characterized in that: the vegetable oil is alkylated vegetable oil.
3. A suspension composition according to claim 2, characterized in that: the alkylated vegetable oil is one of methyl oleate and ethyl oleate.
4. A suspension concentrate characterized by: comprising the suspension composition of any one of claims 1 or 3.
5. A suspension as claimed in claim 4, wherein: also comprises 3 to 5 parts of antifreeze glycol by mass.
6. A suspension as claimed in claim 5, wherein: the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 10-20 parts of alkylated vegetable oil, 3-8 parts of emulsifying dispersant, 3-5 parts of antifreeze, 0.1-0.3 part of xanthan gum and water for supplementing to 100 parts.
7. A suspension as claimed in claim 4, wherein: the emulsifying dispersant is one or more of polyoxyethylene octyl phenol ether, polyoxyethylene sorbitan monooleate, castor oil polyoxyethylene ether and calcium dodecyl benzene sulfonate.
8. A suspension as claimed in claim 6, wherein: the composition comprises the following components in parts by weight: 2 parts of 6-benzylaminopurine, 3 parts of naphthylacetic acid, 20 parts of methyl oleate, 3 parts of calcium dodecyl benzene sulfonate, 3 parts of sorbitan monooleate, 5 parts of ethylene glycol, 0.1 part of xanthan gum and water in balance to 100 parts.
9. A process for preparing a suspension concentrate as claimed in claim 6, characterized in that: the method comprises the following steps:
s1, 6-benzylaminopurine and naphthylacetic acid are proportioned and added with emulsifying dispersant and a proper amount of purified water;
s2 stirring and dispersing 6-benzylaminopurine, naphthylacetic acid, an emulsifying dispersant and purified water;
s3, sanding the pre-dispersed suspending agent stirred in the step S2;
s4, adding methyl oleate, glycol serving as an antifreeze and xanthan gum into the sanded suspending agent, and adding the rest purified water to stir and disperse to obtain a finished suspending agent.
10. Use of a suspension composition according to claim 1 or a suspension according to claim 3 in aircraft defence.
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