CN109452268A - A kind of surfactant and preparation method improving pesticide droplet dispersion interface performance - Google Patents
A kind of surfactant and preparation method improving pesticide droplet dispersion interface performance Download PDFInfo
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- CN109452268A CN109452268A CN201811400376.6A CN201811400376A CN109452268A CN 109452268 A CN109452268 A CN 109452268A CN 201811400376 A CN201811400376 A CN 201811400376A CN 109452268 A CN109452268 A CN 109452268A
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- 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
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- 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
- A01N25/30—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 characterised by the surfactants
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Abstract
The present disclosure provides a kind of surfactants of raising pesticide droplet dispersion interface performance, add it in aqueous spray solution or mixture, the droplet interface performance of pesticidal preparations can be improved；Meanwhile the invention also discloses a kind of preparation method of the surfactant of raising pesticide droplet dispersion interface performance, preparation process is simple, and feed stock conversion is high, and high production efficiency is convenient for industrial application.
Description
Technical field
The present invention relates to insecticides adjuvant technical field, more particularly to a kind of raising pesticide droplet dispersion is interface characteristics
The surfactant and preparation method of energy.
Background technique
Pesticide is the means of production that essential one kind is important in agricultural modernization production, in use always
It there is a problem that effective rate of utilization is low.During especially showing spray-on process application, the droplet that pesticide solution is formed is a large amount of
Drift causes pesticide efficacy very low into environment；And pesticide drop easily causes spring in target surface and tumbles, thus
Cause most of pesticide active ingredient to be lost, in turn results in environmental pollution and the wasting of resources.Agricultural chemicals synergist is in spray-on process
The general name of auxiliary agent used in application or similar application technology can significantly improve pesticide by being properly added agricultural chemicals synergist
Drop increases droplet particle volume diameter, mist when effectively control is spraying in the viscosity of target surface, deposition, wetting and spreading property
Change state reduces medical fluid drift and disperses and effectively inhibit evaporation, pesticide efficacy not only can be improved, but also can
Achieve the purpose that pesticide reduction.
But there are apparent defects for the agricultural chemicals synergist used in the prior art: as CN107251895A discloses one
Kind spray adjuvants and its preparation and application, the invention is to existing commercially available most of pesticide and foliar fertilizer with higher solubility and surely
It is qualitative, droplet anti-evaporating and drift can be improved, but the spray adjuvants have used alkyl phenol polyoxyethylene ether, nonyl phenol
Polyoxyethylene ether is one kind of alkyl phenol polyoxyethylene ether, has injury to male reproductive system, is gradually included in disabling register, therefore
The spray adjuvants may have potential hazard to human body；CN106165681A, which is disclosed, a kind of to be exclusively used in the agricultural of air-spraying and helps
Agent, which has excellent evaporation inhibitory effect and effect of settling, but wherein uses new structure polyphosphazene polymer
Object ND-100 is closed, and ND-100 is 100% hyperbranched C8-18 fatty alcohol ethylene oxide propylene oxide block polymer, is produced into
This height, it is not easy to carry out industrialized production；US20100113275A1 discloses the side with the control pesticide spray drift of self-emulsifying ester
Method, this method in liquid to be sprayed in conjunction with self-emulsifying ester by reducing the side of spray drift in agricultural chemicals application
Method, but its use process is complicated, is limited in application and extension process.
Therefore it provides a kind of preparation process is simple, use process is convenient, highly-safe surfactant and preparation method
The problem of being those skilled in the art's urgent need to resolve.
Summary of the invention
In view of this, the present invention provides a kind of surfactant of raising pesticide droplet dispersion interface performance and preparation sides
Method, preparation process is simple, and feed stock conversion is high, whole high production efficiency, and the surfactant that the present invention is prepared is added
Enter into aqueous spray solution or mixture, the droplet interface performance of pesticidal preparations can be improved.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of surfactant improving pesticide droplet dispersion interface performance, which is characterized in that its chemical structural formula includes
；The R1Including H, CH3Or CH2CH3, the R2Including H, CH3Or CH2CH3, the R3Including H, CH3Or CH2CH3,
The n1 includes the integer of 0-50, and the n2 includes the integer of 0-50, and the n3 includes the integer of 0-50, described n1, n2 and n3
Sum be the integer greater than 0, the Z includes fatty acid residue.
The beneficial effect of above-mentioned optimal technical scheme is: surfactant disclosed by the invention in polyvinylamine main chain into
Row alkoxylate is modified, specifically by the poly- alkylene oxide group chain with about 1-50 alkoxy portion to the hydrogen atom on nitrogen-atoms
Replace, the terminal alkoxy moiety in alkoxylate modification is blocked by hydrogen, fatty acid residue or their mixture.So its
Characteristic with cationic surfactant helps to improve medical fluid in the deposition of target, reduces fluid loss；And contain alkane
Oxygroup chain improves the compatibility of different material between preparation, so as to improve the physical stability between mixed medical fluid；Simultaneously
Reduce droplet evaporation capacity containing oil-soluble fatty acid, so as to improve the utilization rate of pesticide active ingredient；And it can increase
The interfacial tension of big droplet increases mist droplet particle size, uniformity increase, from the drift that can reduce droplet, and then can reduce
The wasting of resources and pollution to environment.
A kind of preparation method of the surfactant as described above improving pesticide droplet dispersion interface performance, feature exist
In specifically comprising the following steps:
(1) epoxide is added into polyvinylamine A aqueous solution, by slaking reaction, polyvinylamine alkane can be obtained
Oxygen compound B aqueous solution；
(2) catalyst is added into polyvinylamine alkyl oxide B aqueous solution, epoxide is then added and is cured
Reaction, polyvinylamine alkyl compound C can be prepared by adding neutralizer adjusting pH；
(3) polyvinylamine alkyl compound C and fatty acid are carried out esterification under the action of catalyst can be obtained one
Kind improves the surfactant of pesticide droplet dispersion interface performance.
The beneficial effect of above-mentioned optimal technical scheme is: in the preparation method of surfactant disclosed by the invention, obtaining
Molecular structure regularity it is more preferable, it is possible to reduce the generation of by-product.First polyvinylamine is directly occurred with epoxide
Alkoxylation avoids introducing catalyst too early and influencing reaction process；R- is obtained after first step alkoxylation
OH compound adds the macromolecular alkoxide compound that catalyst is conducive to produce long-chain, and overall flow is simple, yield is high.
Preferably, specifically comprise the following steps: in the step (1)
(a) polyvinylamine A aqueous solution is first added in a kettle, then uses air in nitrogen replacement reaction kettle, and increase
Temperature is to 80-90 DEG C；
(b) it is passed through epoxide again, and being passed through nitrogen control pressure is 0.15-0.35MPa, while controlled at
80-90 DEG C, 1-3h slaking reaction is carried out, until pressure balance reaction terminates；
(c) abjection volatile component is finally vacuumized under the conditions of 80-85 DEG C, and polyvinylamine alkyl oxide can be obtained
B aqueous solution.
The beneficial effect of above-mentioned optimal technical scheme is: the present invention is first passed through the air in nitrogen replacement reaction kettle, a side
The danger of burning or explosion can occur to avoid inflammable and explosive epoxide for face, and residual air is on the other hand avoided to cause to gather
Ether chain break, to avoid generating small-molecule substance.Raising temperature can trigger alkoxide compound to 80-90 DEG C and yin occur
Ionic polymerization.Make reaction kettle internal and external pressure balance followed by nitrogen pressure maintaining, so as to avoid reaction kettle gas leakage space-time
Gas enters and influences product quality.
Preferably, the structural formula of polyvinylamine A is in the step (1)
The n includes 2~150 integer, and the mass percent of polyvinylamine A is in the polyvinylamine A aqueous solution
50%.
Preferably, the n includes 2~30 integer.
Preferably, epoxide includes ethylene oxide in the step (1).
Preferably, at least alkoxy-modified in the presence of one on each nitrogen-atoms in the polyvinylamine alkyl oxide B.
Preferably, specifically comprise the following steps: in the step (2)
(A) polyvinylamine alkyl oxide B aqueous solution obtained by step (1) and catalyst are first added into reaction kettle, is used in combination
Air in nitrogen replacement reaction kettle, while it being warming up to 100-135 DEG C, abjection moisture makes material moisture < 0.05% in reaction kettle；
(B) 100-160 DEG C is then heated to；It controls feeding temperature and is less than 0.35MPa item for 100-160 DEG C, feed pressure
Epoxide is added under part, and reacts 1-3h under the conditions of 120-160 DEG C, then vacuum outgas 0.5h, continues to repeat above-mentioned
Operation 1~2 time；
(C) makes pressure be maintained at 0.15-0.25MPa to curing pressure to be passed through nitrogen when 0.02MPa, until in reaction kettle
Pressure is constant, and reaction terminates；0.5-1h is finally vacuumized under the conditions of 120-135 DEG C, is then cooled to 70-80 DEG C, and be added
It is 5-7 that neutralization reagent, which adjusts pH, and polyvinylamine alkoxide compound C can be obtained.
Preferably, the ring oxygenate includes ethylene oxide, propylene oxide or epoxy butane.
The beneficial effect of above-mentioned optimal technical scheme is: the present invention is using nitrogen thoroughly in reaction kettle, in material
Air displacement is fallen, can to avoid danger, reduce by-product production；It is carried out dehydrating the water that can remove in material, from
And the active hydrogen in water is avoided to influence alkoxide compound reaction, and then by-product in product is avoided to increase；Present invention control adds
Material temperature degree is lower, reaction rate can be kept too fast to avoid excessively high due to the catalyst concn in starting material；With react into
Trip temperature raising can guarantee reaction rate；By pressure control in controlled range, it is ensured that safety in production.
Preferably, catalyst includes metallic potassium, metallic sodium, potassium methoxide, sodium methoxide, potassium hydroxide, hydrogen in the step (A)
Sodium oxide molybdena, bimetallic class or zinc acetate is one such or multiple combinations, the ratio of the catalyst and epoxide gross mass
Value is 0.0005-0.8:100.
Preferably, the structural formula of the polyvinylamine alkoxide compound C includes
The R1Including H, CH3Or CH2CH3, the R2Including H, CH3Or CH2CH3, the R3Including H, CH3Or CH2CH3,
The n1 includes the integer of 0-50, and the n2 includes the integer of 0-50, and the n3 includes the integer of 0-50.
Preferably, the step (3) specifically:
Polyvinylamine alkoxide compound C and fatty acid are first added in a reservoir, while catalyst is added；It then heats to
145-195 DEG C, the esterification of 2-10h is carried out, while blasting nitrogen dehydration, when acid esters is big less than 4.0mgKOH/g, conversion ratio
In 97%, water soluble polymer comb-shaped polymer D is obtained.
Preferably, fatty acid includes octanoic acid, capric acid, lauric acid, myristic acid, palmitinic acid, tristearin in the step (3)
It is acid, isostearic acid, arachidic acid, behenic acid, lignoceric acid, myristoleic acid, palmitoleic acid, gaidic acid, oleic acid, elaidic acid, different
Oleic acid, linoleic acid, linolelaidic acid, arachidonic acid, eicosapentaenoic acid, erucic acid or docosahexaenoic acid it is one such or
It is a variety of.
The beneficial effect of above-mentioned optimal technical scheme is: the fatty acid that the present invention uses has bactericidal properties, the anti-steaming of fatty acid
Hair, fatty acid molecule structure and plant target surface layer wax matter layer are affinity, are easy in solution pervasion plant.
Preferably, the fatty acid include lauric acid, isostearic acid, stearic acid, oleic acid or linoleic acid it is one such or
A variety of mixtures.
The beneficial effect of above-mentioned optimal technical scheme is: the fatty acid that the present invention uses has reproducibility, from a wealth of sources,
It is easily biodegradable；There is better compatibility with plant leaf surface surface layer, so as to preferably adjust the HLB value of product；Compared with
Good reactivity.
Preferably, catalyst includes sulfuric acid, p-methyl benzenesulfonic acid, sulfamic acid or methane sulfonic acid in the step (3), described
The additive amount of catalyst is the 0.3%-1.5% of polyethers and fatty acid gross mass.
The beneficial effect of above-mentioned optimal technical scheme is: the catalyst that the present invention uses can make the better polyethers of fatty acid anti-
It answers；And the available better target product of regularity under dosage disclosed by the invention.
It can be seen via above technical scheme that compared with prior art, the present disclosure provides a kind of raising pesticide mists
The surfactant and preparation method of drop dispersion interface performance, have the following beneficial effects:
(1) surfactant disclosed by the invention has cationic surfactant characteristic, helps to improve medical fluid in target
Target deposition reduces fluid loss；
(2) contain alkoxylate chain in surfactant disclosed by the invention, the compatibility between preparation can be improved, thus
The physical stability between mixed medical fluid can be improved；
(3) containing oil soluble fatty acid also, in surfactant disclosed by the invention, it is possible to reduce droplet evaporation capacity,
So as to improve the utilization rate of pesticide active ingredient；The interfacial tension that droplet can be increased simultaneously increases mist droplet particle size,
Even property increases, and from the drift that can reduce droplet, and then can reduce the wasting of resources and the pollution to environment；
(4) simultaneously, preparation method preparation process disclosed by the invention is simple, and feed stock conversion is high, and high production efficiency is convenient for
Carry out industrial application.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The embodiment of the invention discloses it is a kind of raising pesticide droplet dispersion interface performance surfactant preparation method,
Specifically comprise the following steps:
(1) polyvinylamine alkyl oxide B aqueous solution is prepared
(a) polyvinylamine A aqueous solution is first added in a kettle, then with air 3 times in nitrogen replacement reaction kettle, and rises
High-temperature is to 80-90 DEG C；
(b) it is passed through epoxide again, and being passed through nitrogen control pressure is 0.15-0.35MPa, while controlled at
80-90 DEG C, 1-3h slaking reaction is carried out, until pressure balance reaction terminates；
(c) abjection volatile component is finally vacuumized under the conditions of 80-85 DEG C, and polyvinylamine alkyl oxide can be obtained
B aqueous solution.
(2) polyvinylamine alkoxide compound C is prepared
(A) polyvinylamine alkyl oxide B aqueous solution obtained by step (1) and catalyst are first added into reaction kettle, is used in combination
Air in nitrogen replacement reaction kettle, while it being warming up to 100-135 DEG C, abjection moisture makes material moisture < 0.05% in reaction kettle；
(B) 100-160 DEG C is then heated to, control feeding temperature is 100-160 DEG C, feed pressure is less than 0.35MPa item
Epoxide is added under part, and reacts 1-3h under the conditions of 120-160 DEG C, then vacuum outgas 0.5h, continues to repeat above-mentioned
Operation 1~2 time；
(C) makes pressure be maintained at 0.15-0.25MPa to curing pressure to be passed through nitrogen when 0.02MPa, until in reaction kettle
Pressure is constant, and reaction terminates；0.5-1h is finally vacuumized under the conditions of 120-135 DEG C, is then cooled to 70-80 DEG C, and be added
It is 5-7 that neutralization reagent, which adjusts pH, and polyvinylamine alkoxide compound C can be obtained.
(3) polyvinylamine alkoxide compound C and fatty acid are first added in a reservoir, while catalyst is added；Then it rises
Temperature carries out the esterification of 2-10h to 145-195 DEG C, while blasting nitrogen dehydration, when acid esters is less than 4.0mgKOH/g, conversion
Rate is greater than 97%, obtains water soluble polymer comb-shaped polymer D, as a kind of surface for improving pesticide droplet dispersion interface performance
Activating agent.
For further optimisation technique scheme, the structural formula of polyvinylamine A is in step (1)
The n includes 2~150 integer, and the mass percent of polyvinylamine A is in the polyvinylamine A aqueous solution
50%.
For further optimisation technique scheme, the n includes 2~30 integer.
For further optimisation technique scheme, epoxide includes ethylene oxide in step (1).
For further optimisation technique scheme, at least have one on each nitrogen-atoms in polyvinylamine alkyl oxide B
It is a alkoxy-modified.
For further optimisation technique scheme, catalyst includes metallic potassium, metallic sodium, potassium methoxide, methanol in step (A)
Sodium, potassium hydroxide, sodium hydroxide, bimetallic class or zinc acetate is one such or multiple combinations, the catalyst and epoxidation
The ratio for closing object gross mass is 0.0005-0.8:100.
For further optimisation technique scheme, the structural formula of polyvinylamine alkoxide compound C includes
R1Including H, CH3Or CH2CH3, R2Including H, CH3Or CH2CH3, R3Including H, CH3Or CH2CH3, n1 includes 0-50's
Integer, n2 include the integer of 0-50, and n3 includes the integer of 0-50.
For further optimisation technique scheme, fatty acid includes octanoic acid, capric acid, lauric acid, nutmeg in step (3)
Acid, palmitinic acid, stearic acid, isostearic acid, arachidic acid, behenic acid, lignoceric acid, myristoleic acid, palmitoleic acid, gaidic acid,
Oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolelaidic acid, arachidonic acid, eicosapentaenoic acid, erucic acid or two dodecahexaenes
Acid is one such or a variety of.
For further optimisation technique scheme, fatty acid includes lauric acid, isostearic acid, stearic acid, oleic acid or sub- oil
Acid is one such or a variety of.
For further optimisation technique scheme, catalyst includes sulfuric acid, p-methyl benzenesulfonic acid, sulfamic acid in step (3)
Or methane sulfonic acid, the additive amount of catalyst are the 0.3%-1.5% of polyethers and fatty acid gross mass.
The invention also discloses a kind of surfactant of raising pesticide droplet dispersion interface performance, chemical structural formula packets
It includes
R1 includes H, CH3 or CH2CH3, and R2 includes H, CH3 or CH2CH3, and R3 includes H, CH3 or CH2CH3, and n1 includes 0-
50 integer, n2 include the integer of 0-50, and n3 includes the integer of 0-50, and Z includes fatty acid residue.
Embodiment 1
The embodiment of the invention discloses it is a kind of raising pesticide droplet dispersion interface performance surfactant preparation method,
Specifically comprise the following steps
(1) in the reaction kettle of a 2L, 200g, n 4,50% Aqueous polyvinylamine solutions are added, and replace 3 with nitrogen
It is secondary, temperature is increased to 80-90 DEG C, is passed through 205gEO, and being passed through nitrogen makes pressure in 0.15-0.35MPa, and at 80-90 DEG C, curing
1-3h, after pressure remains unchanged, reaction terminates.At 80-85 DEG C, abjection volatile component is vacuumized, obtains 65% polyvinylamine
Alkyl oxide 1B aqueous solution.
(2) into another 2L reaction kettle be added step (1) obtained by polyvinylamine alkyl oxide B aqueous solution 200g and
1.76gNaOH heats up 100-135 DEG C again three times with nitrogen displacement, deviates from moisture within a certain period of time, make in 2L reaction kettle
Material moisture < 0.05%, then heats to 100-160 DEG C, is passed through 458gEO, feeding temperature control is in 100-160, and charging is most
Big pressure is less than 0.35MPa；Charging finishes.It is cured between 120-160 DEG C, when curing pressure close to 0.02MPa, is passed through nitrogen
Gas makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；Need curing time about 1-
3h.At 120-135 DEG C, 0.5-1h is vacuumized, is cooled down 70-80 DEG C, neutralization reagent is added, adjusting pH is 5-7.Obtaining hydroxyl value is
The product of 190mgKOH/g；Labeled as 1C.
(3) 1C of 200g, 180g oleic acid and 1.2g methane sulfonic acid are added into four-hole boiling flask, heats up 145-195 DEG C, micro- drum
Nitrogen dehydration, carries out esterification, and when acid value is 2.1mgKOH/g, esterification time 6.5h, conversion ratio 97.7% produced
Product are labeled as 1D.
Embodiment 2
The embodiment of the invention discloses it is a kind of raising pesticide droplet dispersion interface performance surfactant preparation method,
Specifically comprise the following steps:
(1) in the reaction kettle of a 2L, 300g, n 10,50% Aqueous polyvinylamine solutions are added, and replace 3 with nitrogen
It is secondary, temperature is increased to 80-90 DEG C, is passed through 614gEO, and being passed through nitrogen makes pressure in 0.15-0.35MPa, and at 80-90 DEG C, curing
1-3h, after pressure remains unchanged, reaction terminates.At 80-85 DEG C, abjection volatile component is vacuumized, obtains 68% polyvinylamine
Alkyl oxide 2B aqueous solution.
(2) into another 2L reaction kettle be added step (1) obtained by polyvinylamine alkyl oxide B aqueous solution 200g and
2.2gKOH heats up 100-135 DEG C again three times with nitrogen displacement, deviates from moisture within a certain period of time, make object in 2L reaction kettle
Expect moisture < 0.05%, then heat to 100-160 DEG C, be passed through 504gPO, feeding temperature is controlled at 100-160 DEG C, and charging is most
Big pressure is less than 0.35MPa；Charging finishes.It is cured between 120-160 DEG C, when curing pressure close to 0.02MPa, is passed through nitrogen
Gas makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；Need curing time about 1-
3h.At 120-135 DEG C, 0.5-1h is vacuumized.Then it is warming up to 100-160 DEG C again, is passed through 86gEO, feeding temperature control exists
100-160 DEG C, charging maximum pressure is less than 0.35MPa；Charging finishes.It is cured between 120-160 DEG C, when curing pressure is close
When 0.02MPa, being passed through nitrogen makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；It needs
Want curing time about 1-3h.It at 120-135 DEG C, vacuumizes 0.5-1h and cools down 70-80 DEG C, neutralization reagent is added, adjusting pH is 5-
7.Obtain the product that hydroxyl value is 78mgKOH/g；Labeled as 2C.
(3) 2C of 200g, 41g lauric acid and 1.8g sulfamic acid are added into four-hole boiling flask, heats up 145-195 DEG C, it is micro-
Drum nitrogen dehydration, carries out esterification, and when acid value is 1.2mgKOH/g, esterification time 8.5h, conversion ratio 97.5% obtained bright
Clear yellow viscous is transparent, water-soluble products, is labeled as 2D.
Embodiment 3
The embodiment of the invention discloses it is a kind of raising pesticide droplet dispersion interface performance surfactant preparation method,
Specifically comprise the following steps:
(1) in the reaction kettle of a 2L, 400g, n 30,50% Aqueous polyvinylamine solutions are added, and replace 3 with nitrogen
It is secondary, temperature is increased to 80-90 DEG C, is passed through 409gEO, and being passed through nitrogen makes pressure in 0.15-0.35MPa, and at 80-90 DEG C, curing
1-3h, after pressure remains unchanged, reaction terminates.At 80-85 DEG C, abjection volatile component is vacuumized, obtains 66% polyvinylamine
Alkyl oxide 3B aqueous solution.
(2) into another 2L reaction kettle be added step (1) obtained by polyvinylamine alkyl oxide B aqueous solution 200g and
2.9gCH3KO heats up 100-135 DEG C again three times with nitrogen displacement, deviates from moisture within a certain period of time, make in 2L reaction kettle
Material moisture < 0.05%, then heats to 100-160 DEG C, is passed through 585gPO, and feeding temperature controls the charging at 100-160 DEG C
Maximum pressure is less than 0.35MPa；Charging finishes.It cures between 120-160 DEG C, when curing pressure close to 0.02MPa, is passed through
Nitrogen makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；Need curing time about 1-
3h.At 120-135 DEG C, 0.5-1h is vacuumized.Then it is warming up to 100-160 DEG C again, is passed through 266gEO, feeding temperature control exists
100-160 DEG C, charging maximum pressure is less than 0.35MPa；Charging finishes.It is cured between 120-160 DEG C, when curing pressure is close
When 0.02MPa, being passed through nitrogen makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；It needs
Want curing time about 1-3h.It at 120-135 DEG C, vacuumizes 0.5-1h and cools down 70-80 DEG C, neutralization reagent is added, adjusting pH is 5-
7.Obtain the product that hydroxyl value is 116mgKOH/g；Labeled as 3C.
(3) 2C of 300g is added into four-hole boiling flask, 138 linoleic acid g and 4.3g p-methyl benzenesulfonic acid heat up 145-195 DEG C,
Micro- bulging nitrogen dehydration, carries out esterification, and when acid value is 1.5mgKOH/g, esterification time 9.5h, conversion ratio 97.6% is obtained
Glassy yellow clear viscous, water-soluble products are labeled as 3D.
Embodiment 4
The embodiment of the invention discloses it is a kind of raising pesticide droplet dispersion interface performance surfactant preparation method,
Specifically comprise the following steps:
(1) in the reaction kettle of a 2L, 400g, n 20,50% Aqueous polyvinylamine solutions are added, and replace 3 with nitrogen
It is secondary, temperature is increased to 80-90 DEG C, is passed through 204.6gEO, being passed through nitrogen makes pressure in 0.15-0.35MPa, and at 80-90 DEG C, ripe
Change 1-3h, after pressure remains unchanged, reaction terminates.At 80-85 DEG C, abjection volatile component is vacuumized, obtains 69% polyethylene
Amine alkyl oxide 4B aqueous solution.
(2) into another 2L reaction kettle be added step (1) obtained by polyvinylamine alkyl oxide B aqueous solution 200g and
4.6gCH3ONa heats up 100-135 DEG C again three times with nitrogen displacement, deviates from moisture within a certain period of time, make in 2L reaction kettle
Material moisture < 0.05%, then heats to 100-160 DEG C, is passed through 920gPO, and feeding temperature controls the charging at 100-160 DEG C
Maximum pressure is less than 0.35MPa；Charging finishes.It cures between 120-160 DEG C, when curing pressure close to 0.02MPa, is passed through
Nitrogen makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；Need curing time about 1-
3h.At 120-135 DEG C, 0.5-1h is vacuumized.Then it is warming up to 100-160 DEG C again, is passed through 488gEO, feeding temperature control exists
100-160 DEG C, charging maximum pressure is less than 0.35MPa；Charging finishes.It is cured between 120-160 DEG C, when curing pressure is close
When 0.02MPa, being passed through nitrogen makes pressure be maintained at 0.15-0.25MPa.When reacting kettle inner pressure remains unchanged, reaction terminates；It needs
Want curing time about 1-3h.It at 120-135 DEG C, vacuumizes 0.5-1h and cools down 70-80 DEG C, neutralization reagent is added, adjusting pH is 5-
7.Obtain the product that hydroxyl value is 110mgKOH/g；Labeled as 4C.
(2) 2C of 300g, 43g stearic acid and 3.43g p-methyl benzenesulfonic acid are added into four-hole boiling flask, heats up 145-195 DEG C,
Micro- bulging nitrogen dehydration, carries out esterification, and when acid value is 0.71mgKOH/g, esterification time 9.5h, conversion ratio 97.0% is obtained
To fulvescent clear viscous, water-soluble products are labeled as 4D.
Pass through the technical effect for the surfactant that experimental verification above-described embodiment 1~4 is prepared.
One, performance characterization: contact angle, the cloud point, viscosity of the embodiment of the present invention 1~4 and commercially available nitrogenous auxiliary agent E are measured respectively
And balance tension.
1, contact angle
It is 0.2% that auxiliary agent that Examples 1 to 4 is prepared and commercially available nitrogenous auxiliary agent E, which are first diluted to mass percent,
Then adjuvant water solution measures contact angle, as a result as shown in table 1 below respectively.
2, cloud point
It is 1% to help that auxiliary agent that Examples 1 to 4 is prepared and commercially available nitrogenous auxiliary agent E, which are first diluted to mass percent,
Then agent aqueous solution measures cloud point, as a result as shown in table 1 below respectively.
3, viscosity
It is pure using the auxiliary agent viscosity for measuring the embodiment of the present invention 1~4 with spindle and commercially available nitrogenous auxiliary agent E is prepared
The viscosity of sample measures on the TA ARG2 rheometer of TA Instruments, as a result as shown in table 1 below.
4, equilibrium surface tension
It is 1% to help that auxiliary agent that Examples 1 to 4 is prepared and commercially available nitrogenous auxiliary agent E, which are first diluted to mass percent,
Agent aqueous solution, then in Kruss model K10ST tension of 25.0 DEG C of ± 0.1 DEG C of stalagmometries equipped with Wilhelmy plate
Meter measures, as a result as shown in table 1 below.
Table 1
Can obviously be learnt by the data in above-mentioned table 1: the auxiliary agent that the embodiment of the present invention 1~4 is prepared is compared to city
Auxiliary agent E is sold with lower contact angle, is conducive to preparation sprawling on target, minimum contact angle is 45 ° and not only improves preparation
Withholding on target, but it is smaller and be lost to avoid contact with angle, facilitates reservation of the preparation on target；The present invention is implemented
Its cloud point of the auxiliary agent that example 1~4 is prepared is easy to form uniform and stable lotion in cold water, combines linear water less than 10 DEG C
Soluble cationic, oiliness (hydrophobicity), hydrophily compatible nonionic and optional anionic functionality, auxiliary agent of the present invention need not add
Add other surfaces activating agent, improves compatibility and stability between preparation；The auxiliary agent that the embodiment of the present invention 1~4 is prepared
It shows high viscosity, there is good rheology efficiency；The relatively commercially available auxiliary agent E of the auxiliary agent that the embodiment of the present invention 1~4 is prepared is helped
Agent has lower equilibrium surface tension, improves preparation and sprawls effect on target.
Two, medicinal liquor barrel mixes stability experiment
Medicament: 20% dinotefuran suspending agent, 350g/L imidacloprid suspending agent, 10% quizalofop-p-ethyl emulsion in water, 11% Ah
Tie up etoxazole suspending agent, 50% thiophanate-methyl wettable powder, 10% cyhalofop-butyl missible oil；
Test method: by synthesis gained auxiliary agent, commercially available auxiliary agent E, ND-100, MSD-40 respectively according to dilution times shown in table 2
Number, which is diluted and is prepared into bucket with medicament, mixes medical fluid；Bucket is mixed medical fluid to be placed in the tool plug graduated cylinder of 100ml point bottom, 1h is stood and sees
Examining it, whether there is or not floating cream deposited phenomenons, are denoted as qualification to not floating cream precipitating, otherwise to be unqualified, as a result as shown in table 2 below.
Table 2
Can obviously be learnt by 2 data of table: the auxiliary agent and 20% dinotefuran that the embodiment of the present invention 1~5 is prepared suspend
Agent, 350g/L imidacloprid suspending agent, 10% quizalofop-p-ethyl emulsion in water, 11% AVM hereinafter etoxazole suspending agent, 10% cyhalofop-butyl
Missible oil has good compatibility, and the dosage form kind that other 3 kinds commercially available auxiliary agent buckets mix qualified stability is less than conjunction of the present invention
At auxiliary agent.
Three, Inhibition test is evaporated
Medicament: 20% dinotefuran suspending agent
Test method: by synthesis gained auxiliary agent, commercially available auxiliary agent E according to 1500 × dilution, medicament is according to 200 × dilution.It can
Using double dilution method, 150 × auxiliary agent dilution is first configured, is reconfigured 20 × medicament dilution, the two after being sufficiently stirred
It is configured to mixed liquor, 9 times of clear water is added, stirs evenly.Then, a piece of glass slide is taken to be placed in a ten thousandth balance,
After zero, 50 μ l dilutions are added dropwise on glass slide, record the quality of initial dilution.Then in 10,20,40min difference
The quality of different time dilution is recorded, calculates the evaporation rate of different time dilution, evaporation test is in laboratory with constant temperature and constant humidity
It carries out, laboratory condition: 25.0 DEG C ± 0.1 DEG C, relative humidity 45%.As a result as shown in table 3 below.
Calculation formula: the first prothyl of evaporation rate (%)=(dilution initial mass-different time dilution quality)/dilution
Amount × 100%.
Table 3
Can obviously be learnt by above-mentioned 3 experimental result of table: the auxiliary agent that the embodiment of the present invention 1~4 is prepared can obviously change
The anti-evaporating performance of kind medical fluid, significantly reduces the evaporation rate of medical fluid, extends between medical fluid and plant tissue in the same time
The time of interaction, it is contemplated that plant can be significantly improved to the uptake of medical fluid, promote the performance of drug effect.
Four, influence of the additive synthesis to medical fluid retention volume
Medicament: 350g/L imidacloprid suspending agent
Test method: Examples 1 to 4 is prepared, auxiliary agent, commercially available auxiliary agent ND-100 respectively according to 400 ×, 300
×, 200 × dilution, medicament is according to 1500 × dilution.Double dilution method can be used, first configure 10 × auxiliary agent dilution, be reconfigured
150 × medicament dilution configures the mixed liquor of three parts of the two after being sufficiently stirred, then is separately added into 3 times, 2 times, 1 times clear
Water stirs evenly.Then, it takesCulture dish is placed in a ten thousandth balance, after zero, usesIt beats
Hole device intercepts about 2cm2Circular plant leaf blade first weighs and records leaf quality, dips configuration with sharp mouth tweezers clamping blade
Good medical fluid to be measured repeats to infiltrate 10s, vacantly stands 10s, is placed in culture dish and weighs blade and hold liquid quality.It can obtain medical fluid
Retention volume difference, as a result as shown in table 4 below.
Table 4
Can obviously be learnt by the experimental result in above-mentioned table 4: the auxiliary agent that the present invention is prepared facilitates preparation withholding
The increase of amount；The auxiliary agent 1D that embodiment 1 is prepared, molecular weight is about 4487, viscosity 230mPas, ND-100 molecular weight
For 16000-20000, viscosity 500-800Pas, under the same conditions, the preparation medical fluid retention volume ratio of addition 1D auxiliary agent adds
Add the preparation medical fluid retention volume of ND-100 higher；The preparation retention volume that the auxiliary agent that the addition present invention is prepared obtains, which is all larger than, to be added
Add the preparation retention volume of ND-100 with.
Five, the method for tank mix spray drift is analyzed
Medicament: 10% quizalofop-p-ethyl emulsion in water
Test method 1: will synthesis gained auxiliary agent, commercially available auxiliary agent MSD-40 according to 500 × dilution, medicament according to 750 × it is dilute
It releases.Double dilution method can be used, first configure 50 × auxiliary agent dilution, be reconfigured 75 × medicament dilution and match after being sufficiently stirred
The mixed liquor for setting the two, adds 9 times of clear water, stirs evenly.Then, in the droplet overall merit test for holding up space development
With the common 110-03 type Fan spray head of motor driven sprayer on instrument, 0.3MPa press atomization imposes 2m/s, 3m/s, 5m/ respectively
The lateral wind of s, away from the isometric parallel cotton thread device that laying spacing is 10cm at nozzle 1m in spraying wind-tunnel, after spraying pause,
Cotton thread is collected, measures the content of medical fluid on every cotton thread respectively.Calculation formula: drift rate (%)=(different test position cotton threads
Chinese medicine liquid hold-up-dilution liquid hold-up)/dilution liquid hold-up × 100%.The drift value of you can get it medical fluid, as a result such as the following table 5 institute
Show.
Table 5
Test method 2: solution is prepared by method 1.Then, the droplet of holding up space development is comprehensive and evaluation test instrument on by method
1 spray condition is sprayed.Spraying droplet particle size data DV1, DV5, DV9 are tested, synchronizes and particle size distribution span is calculated, is counted
Calculate formula are as follows: span=(DV9-DV1)/DV5, particle size span can reflect the uniformity of particle diameter distribution, and numerical value is closer to 1, then
Distribution is more uniform, as a result such as the following table 6
Table 6
Can obviously be learnt by the data in above-mentioned table 5: under 3m/s wind speed and the simulation of following meteorological condition, the present invention is real
Applying the more commercially available MSD-40 of auxiliary agent that example 1~4 is prepared can preferably inhibit droplet to generate drift, can effectively reduce medical fluid drift
Shifting rate improves herbicide application safety；Even if under the extreme meteorological condition simulation of 5m/s prepared by the embodiment of the present invention 1~4
Obtained auxiliary agent remains to the performance for showing to inhibit medical fluid drift rate.
Can obviously be learnt by the data in above-mentioned table 6: the preparation that the present invention is prepared can effectively increase droplet
Partial size greatly reduces the quantity of the small particle droplet easily to drift about, while guaranteeing that 90% or more droplet is in < again
In 300 μm of most adaptability object particle size range, while bucket can be made to mix medical fluid partial size point using the auxiliary agent that the embodiment of the present invention synthesizes
Cloth span is smaller, illustrates that the distribution of its atomizing particle size is more uniform.
Six, resistance of rainwater washing against performance
Medicament: 10% cyhalofop-butyl missible oil
Test method: by synthesis gained auxiliary agent, commercially available auxiliary agent MSD-40 according to 500 × dilution, medicament is according to 50 × dilution.
Double dilution method can be used, first configure 50 × auxiliary agent dilution, be reconfigured 5 × medicament dilution, the two after being sufficiently stirred
It is configured to mixed liquor, 9 times of clear water is added, stirs evenly.Then, using potter spray tower, potting is uniformly sprayed
Semen euphorbiae, 1h after application, using the aperture 1mm shower, to the potting semen euphorbiae after application simulate respectively 30min, 60min,
The weeds cauline leaf of 5 point sampling clip equivalent is taken in 120min rainfall after simulated rainfall, and the residual detector analysis weeds of agriculture is utilized to plant
The persticide residue of strain.Influence of the auxiliary agent to medicament resistance of rainwater washing against performance can be obtained, as a result as shown in table 7 below.
Table 7
Can obviously be learnt by data in above-mentioned table 7: the auxiliary agent and medicament barrel that the embodiment of the present invention is prepared are mixed can
The persticide residue for significantly improving weeds plant after simulated rainfall illustrates that auxiliary agent that the present invention synthesizes has and improves the resistance to rainwater of medicament
Influence of the rainfall to drug effect after application can be effectively reduced in the effect of performance of flushing.
Seven, field efficacy is tested
(1) controlling object 1: grain aphid；For studying object: wheat；Medicament: 350g/L imidacloprid suspending agent；
Test method: after Yu little Mai jointing, test is carried out in the plot of hundred plants of insect populations of field investigation about 1000.Institute will be synthesized
Auxiliary agent, commercially available auxiliary agent MSD-40 are obtained according to 500 × dilution, medicament is according to 1500 × dilution.Double dilution method can be used, first configure
50 × auxiliary agent dilution, is reconfigured 5 × medicament dilution, and the two after being sufficiently stirred is configured to mixed liquor, adds 9 times
Clear water stirs evenly.Using electronic knapsack sprayer, model 20FT, conical nozzle, volume 15L, atomisation pressure
0.25MPa~0.4MPa, uniformly sprays random district's groups plot, and setting is not added with auxiliary agent group and clear water control group, after medicine 1d,
3d, 7d, 14d investigate insect population number respectively.The preventive effect data whether auxiliary agent has synergistic effect to pesticide can be obtained, it is as a result as follows
Shown in table 8.
Table 8
(2) controlling object 2: prodenia litura；For studying object: soybean；Medicament: 20% dinotefuran suspending agent；
Test method: in soybean the middle and late growth stage, insect population investigation is trapped with black light lamp, 30~50/d, can carry out prevention and treatment
Test.Gained auxiliary agent, commercially available auxiliary agent E will be synthesized according to 1500 × dilution, medicament is according to 1500 × dilution.Secondary dilution can be used
Method first configures 150 × auxiliary agent dilution, is reconfigured 150 × medicament dilution, and the two after being sufficiently stirred is configured to mix
Liquid adds 9 times of clear water, stirs evenly.Using electronic knapsack sprayer, model 20FT, conical nozzle, volume
15L, atomisation pressure 0.25MPa~0.4MPa, uniformly spray random district's groups plot, and setting is not added with auxiliary agent group and clear water control
Group, 1d, 3d, 7d, 14d investigate insect population number respectively after medicine.The preventive effect whether auxiliary agent has synergistic effect to pesticide can be obtained
Data, the results are shown in Table 9.
Table 9
(3) controlling object 3: Tetranychus urticae；For studying object: muskmelon (protecting field)；
Medicament: 11% AVM hereinafter etoxazole suspending agent；
Test method: after muskmelon fruiting, test is carried out in the plot that insect population investigates about 200/leaf of insect population.It will synthesis gained
Auxiliary agent, commercially available auxiliary agent ND-100 are according to 400 × dilution, and medicament is according to 3000 × dilution.Double dilution method can be used, first configure 40
× auxiliary agent dilution, is reconfigured 300 × medicament dilution, and the two after being sufficiently stirred is configured to mixed liquor, adds 9 times
Clear water stirs evenly.Using electronic knapsack sprayer, model 20FT, conical nozzle, volume 15L, atomisation pressure
0.25MPa~0.4MPa, uniformly sprays random district's groups plot, and setting is not added with auxiliary agent group and clear water control group, after medicine 1d,
3d, 7d, 14d investigate insect population number respectively.The preventive effect data whether auxiliary agent has synergistic effect to pesticide can be obtained, as a result such as table
Shown in 10.
Table 10
Can obviously be learnt by the data of above-mentioned table 8~10: the auxiliary agent that the present invention is prepared is mixed with medicament barrel and can be shown
It writes and improves insecticide preventive effect, and the more commercially available three kinds of auxiliary agents of synergistic effect are higher.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of surfactant for improving pesticide droplet dispersion interface performance, which is characterized in that its chemical structural formula includes；
Or
；
The R1Including H, CH3Or CH2CH3, the R2Including H, CH3Or CH2CH3, the R3Including H, CH3Or CH2CH3, described
N1 includes the integer of 0-50, and the n2 includes the integer of 0-50, and the n3 includes the integer of 0-50, and the Z includes that fatty acid is residual
Base.
2. a kind of preparation method of the surfactant as described in claim 1 for improving pesticide droplet dispersion interface performance,
It is characterized in that, specifically comprises the following steps:
(1) epoxide is added into polyvinylamine A aqueous solution, by slaking reaction, polyvinylamine alkoxide can be obtained
Close object B aqueous solution；
(2) catalyst is added into polyvinylamine alkyl oxide B aqueous solution, epoxide is then added and cure instead
It answers, polyvinylamine alkyl compound C can be prepared by adding neutralizer adjusting pH；
(3) polyvinylamine alkyl compound C is carried out esterification with fatty acid one kind can be obtained to mention under the action of catalyst
The surfactant of high pesticide droplet dispersion interface performance.
3. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 2,
It is characterized in that, in the step (1) specifically:
(a) polyvinylamine A aqueous solution is first added in a kettle, then uses air in nitrogen replacement reaction kettle, and increase temperature
To 80-90 DEG C；
(b) it is passed through epoxide again, and being passed through nitrogen control pressure is 0.15-0.35MPa, while controlled at 80-90
DEG C, 1-3h slaking reaction is carried out, until pressure balance reaction terminates；
(c) abjection volatile component is finally vacuumized under the conditions of 80-85 DEG C, and polyvinylamine alkyl oxide B water can be obtained
Solution.
4. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 3,
It is characterized in that, the structural formula of polyvinylamine A is in the step (1)
The n includes 2~150 integer, and the mass percent of polyvinylamine A is 50% in the polyvinylamine A aqueous solution.
5. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 2,
It is characterized in that, in the step (2) specifically:
(A) polyvinylamine alkyl oxide B aqueous solution obtained by step (1) and catalyst are first added into reaction kettle, and uses nitrogen
Air in replacement reaction kettle, while it being warming up to 100-135 DEG C, abjection moisture makes material moisture < 0.05% in reaction kettle；
(B) 100-160 DEG C is then heated to, control feeding temperature is 100-160 DEG C, feed pressure is less than under the conditions of 0.35MPa
Epoxide is added, and reacts 1-3h under the conditions of 120-160 DEG C, then vacuum outgas 0.5h, continues to repeat aforesaid operations 1
~2 times；
(C) makes pressure be maintained at 0.15-0.25MPa to curing pressure to be passed through nitrogen when 0.02MPa, until reacting kettle inner pressure
Constant, reaction terminates；0.5-1h is finally vacuumized under the conditions of 120-135 DEG C, is then cooled to 70-80 DEG C, and neutralization is added
It is 5-7 that reagent, which adjusts pH, and polyvinylamine alkoxide compound C can be obtained.
6. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 5,
It is characterized in that, catalyst includes metallic potassium, metallic sodium, potassium methoxide, sodium methoxide, potassium hydroxide, hydroxide in the step (A)
Sodium, bimetallic class or zinc acetate is one such or multiple combinations；The catalyst and the ratio of epoxide gross mass are
0.0005-0.8:100.
7. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 5,
It is characterized in that, the structural formula of the polyvinylamine alkoxide compound C includes
Or
The R1Including H, CH3Or CH2CH3, the R2Including H, CH3Or CH2CH3, the R3Including H, CH3Or CH2CH3, described
N1 includes the integer of 0-50, and the n2 includes the integer of 0-50, and the n3 includes the integer of 0-50.
8. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 2,
It is characterized in that, the step (3) specifically:
Polyvinylamine alkoxide compound C and fatty acid are first added in a reservoir, while catalyst is added；Then heat to 145-
195 DEG C, the esterification of 2-10h is carried out, while blasting nitrogen dehydration, when acid esters is less than 4.0mgKOH/g, conversion ratio is greater than
97%, obtain water soluble polymer comb-shaped polymer D.
9. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 8,
It is characterized in that, in the step (3) fatty acid include octanoic acid, it is capric acid, lauric acid, myristic acid, palmitinic acid, stearic acid, different
Stearic acid, arachidic acid, behenic acid, lignoceric acid, myristoleic acid, palmitoleic acid, gaidic acid, oleic acid, elaidic acid, vaccenic acid,
Linoleic acid, linolelaidic acid, arachidonic acid, eicosapentaenoic acid, erucic acid or docosahexaenoic acid are one such or a variety of
Mixture.
10. a kind of preparation method of surfactant for improving pesticide droplet dispersion interface performance according to claim 8,
It is characterized in that, catalyst includes sulfuric acid, p-methyl benzenesulfonic acid, sulfamic acid or methane sulfonic acid, the catalysis in the step (3)
The additive amount of agent is the 0.3%-1.5% of polyethers and fatty acid gross mass.
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