CN109453725A - A kind of bivalve layer pyrethroids microcapsules and its preparation method and application - Google Patents
A kind of bivalve layer pyrethroids microcapsules and its preparation method and application Download PDFInfo
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- CN109453725A CN109453725A CN201811442391.7A CN201811442391A CN109453725A CN 109453725 A CN109453725 A CN 109453725A CN 201811442391 A CN201811442391 A CN 201811442391A CN 109453725 A CN109453725 A CN 109453725A
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- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/16—Interfacial polymerisation
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- 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
- A01N25/26—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 in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- 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
- A01N37/18—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 containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/12—Asteraceae or Compositae [Aster or Sunflower family], e.g. daisy, pyrethrum, artichoke, lettuce, sunflower, wormwood or tarragon
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- B01J13/14—Polymerisation; cross-linking
- B01J13/18—In situ polymerisation with all reactants being present in the same phase
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- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
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Abstract
The invention belongs to microencapsulation material field, a kind of bivalve layer pyrethroids microcapsules and its preparation method and application are disclosed.Melamine and formalin are added sequentially to be uniformly mixed in reactor, adding alkali regulation system pH value is 8~9, is then stirred to react in 65~70 DEG C to system bleach, adding water, the reaction was continued, obtains melamine performed polymer；Melamine performed polymer, chain extender and the emulsifier stirring and dissolving that is added to the water is uniform, acid adding regulation system pH value is 1~6, add the homogeneous mixture of curing agent, pyrethroids and solvent, it emulsifies and is stirred to react, after the reaction was completed plus alkali regulation system pH value >=6, the bivalve layer pyrethroids microcapsules are obtained.Gained bivalve layer pyrethroids microcapsules of the invention have good quality stability and storage stability, have a good application prospect in coating or other materials field.
Description
Technical field
The invention belongs to microencapsulation material fields, and in particular to a kind of bivalve layer pyrethroids microcapsules and preparation method thereof and answer
With.
Background technique
Microcapsules technology originates in the thirties in last century earliest.After decades of development, it has been widely used at present
The fields such as food, drug, cosmetics, under the overall background of multi-crossed disciplines application, microcapsules technology is more extended to resin, applies
The trend of the frontiers such as material.So-called microcapsules technology refers to by either physically or chemically encapsulating solid, liquid or gas
In small and sealing capsule, make it with the technology of given pace release by control environmental condition.Wherein, encapsulated object
Matter is known as active core material, and encapsulating core material realizes that the encapsulated inert substance of micro-capsule is known as wall material.Day can be selected in the wall material of microcapsules
Right macromolecule, semi-synthetic macromolecule and synthesis high molecular material, also known as softgel shell layer.According to the chemical property of active core material, can be
Oil-soluble, water soluble compound or mixture, phase can be powder, solid, liquid or gas.It is continuous for many years by people
Development, can encapsulation object kind it is extremely various, as crosslinking agent, catalyst, chemical reactor, color developing agent, drug, insecticide,
Aqueous solution, dyestuff, pigment, detergent, food etc..
Pyrethroids is the main component of mosquito eradication product, is a kind of pesticide that can effectively kill mosquitos and flies, there is natural pyrethroids and change
Learn synthesis pyrethroids.The main component of natural pyrethroids is pyrethrin；Chemically synthesized pyrethroids is known as pyrethroid, type compared with
It is more, there are Permethrin, tetramethrin, cypermethrin, decis, esbiothrin etc., these ingredients belong to the world and defend
Raw Organisation recommendations can be used for preventing and treating the medicament of sanitary insect pest and its medium.
Pyrethroids microcapsules combine microcapsules technology and pyrethroids to the killing effect of mosquito.But current pyrethroids microcapsules are universal
It walks quickly and keeps away that developing agent storage is unstable, and application range is influenced by environment temperature and humidity in the presence of for mosquito, has pollution to environment, becoming
Keep away problem inadequate in the long-term effect of mosquito.
Summary of the invention
In place of the above shortcoming and defect of the existing technology, the primary purpose of the present invention is that providing a kind of bivalve
The preparation method of layer pyrethroids microcapsules.The method of the present invention coats pyrethroids by microcapsules technology, can avoid pyrethroids and is storing, transports
It is defeated, because being lost caused by the factors such as light, heat during landfill；Pyrethroids is coated by bilayered microcapsule coating technology, can avoid
During landfill, excessive stimulation is caused to human body, influences personal safety；By technology to the mechanical properties of microcapsules into
Row control, can avoid storage, transport, because of the excessive bring loss of microcapsules rupture during landfill.
Another object of the present invention is to provide a kind of bivalve layer pyrethroids microcapsules being prepared by the above method.
A further object of the present invention is to provide application of the above-mentioned bivalve layer pyrethroids microcapsules in anti-mosquito coating.It will be micro-
Encapsulated pyrethroids is dispersed in coating, on the one hand can be when harmful insect contacts, the effect with efficient desinsection, expelling parasite
Fruit, the pyrethroids slow release in another aspect microcapsules, and can long-acting killing walk quickly and keep away mosquito.
The object of the invention is achieved through the following technical solutions:
A kind of preparation method of bivalve layer pyrethroids microcapsules, including following preparation step:
(1) melamine and formalin are added sequentially to be uniformly mixed in reactor, add alkali regulation system pH
Value is 8~9, is then stirred to react in 65~70 DEG C to system bleach, adding water, the reaction was continued, obtains melamine performed polymer；
(2) melamine performed polymer, chain extender and the emulsifier stirring and dissolving that is added to the water is uniform, acid adding regulation system pH value
It is 1~6, adds the homogeneous mixture of curing agent, pyrethroids and solvent, emulsify and be stirred to react, after the reaction was completed plus alkali is adjusted
System pH >=6 obtain the bivalve layer pyrethroids microcapsules.
Preferably, formalin described in step (1) refer to mass concentration be 37 ± 2% formalin, described three
The molar ratio of contained formaldehyde is 1:(3~5 in poly cyanamid and formalin), the addition water amount of water that the reaction was continued is formaldehyde
1~3 times of solution quality.
Preferably, alkali described in step (1) and step (2) is lithium hydroxide, potassium hydroxide, sodium hydroxide, hydroxide
At least one of calcium, triethylamine, ammonium hydroxide；Acid described in step (2) is sulfuric acid, hydrochloric acid, oxalic acid, acetic acid, benzoic acid, first
At least one of acid, succinic acid.
Preferably, the time being stirred to react described in step (1) be 10~15min, be added the water time that the reaction was continued be
20~50min.
Preferably, chain extender described in step (2) be ethylenediamine, diethylenetriamine, triethylene tetramine, polyetheramine D230,
At least one of polyetheramine D400,1,4- butanediol, polyethylene glycol 400, cetomacrogol 1000, polyethylene glycol 2000.
Preferably, emulsifier described in step (2) is gum arabic powder.
Preferably, the mass ratio that melamine performed polymer described in step (2), chain extender and emulsifier are added be 100:(5~
10): (20~30).
Preferably, curing agent described in step (2) be MDI performed polymer (Suprasec 2244, Suprasec 2344,
Suprasec 2644 etc.), TDI performed polymer (Desmodur L-75, Desmodur L-1470, Desmodur CB-75N etc.),
At least one of TDI tripolymer (Coronate 2030, Coronate MG-55, Desmodur IL-1351 etc.).
Preferably, pyrethroids described in step (2) is pyrethrin, Permethrin, tetramethrin, cypermethrin, decis, the right side
Revolve at least one of trans- allethrin.
Preferably, solvent described in step (2) is ethyl acetate, in butyl acetate, ethyl phenylacetate, chlorobenzene, dimethylbenzene
One or more kinds of mixed solvents.
Preferably, the specific steps for emulsifying and being stirred to react described in step (2) are as follows:
First continuous emulsification reacts 20~50min under condition of ice bath and 400~2000r/min, then heats to 40~80
DEG C, it uses instead and is stirred to react 3~5h under 50~400r/min of turbulences paddle.
A kind of bivalve layer pyrethroids microcapsules, are prepared by the above method.
Preferably, the average grain diameter of the bivalve layer pyrethroids microcapsules is 0.1~300 μm.
Application of the above-mentioned bivalve layer pyrethroids microcapsules in anti-mosquito coating.
Preferably, the application process are as follows: bivalve layer pyrethroids microcapsules are added to painting by 5%~10% mass fraction
It in material, is uniformly mixed, obtains anti-mosquito coating.
The principle of the present invention are as follows: (1) be dispersed into emulsification system in the curing agent and water phase in the oily phase of fine droplet
Chain extender, the residual amine in water and melamine performed polymer occurs interface polymerization reaction ((a), (b) in such as attached drawing 1) and forms polyureas
Resin hypostracum.(2) in acid condition, the melamine performed polymer being incorporated on carbamide resin hypostracum further adsorbs in water phase
Remaining melamine performed polymer, by home position polymerization reaction (in such as attached drawing 1 (c)), gradually polyureas inner casing layer surface deposit, shape
At melamine outer shell.
Preparation method of the invention and obtained product have the following advantages that and the utility model has the advantages that
(1) pyrethroids microcapsules prepared by the present invention be white or canescence uniform spherome, 0.1~300 μm of average grain diameter；Water
Divide mass content≤5%；0~900mN of limit stress, good mechanical property.
(2) double shell microcapsule prepared by the present invention not only controls core material sustained release rate by the encapsulating of hypostracum,
The shock resistance and chemical-resistant that microcapsules are also improved by outer shell guarantee that the quality stability of product and storage are steady
It is qualitative.
(3) the active material pyrethroids raw material type of the preparation method of double shell microcapsule of the present invention is more, from a wealth of sources, shell
Layer cost of material is cheap.
(4) preparation process of the present invention is simple, the double shell microcapsule of production can be widely applied to functional paint or its
His Material Field.
(5) polycondensation reaction that melamine and formaldehyde occur in preparation process of the present invention, residual formaldehyde content are lower than
5%.
Detailed description of the invention
Fig. 1 is reaction principle schematic diagram of the present invention.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
The performance characterization method of microcapsules prepared by the present invention is as follows: the test of appearance: observing and recording under natural light；It is flat
Equal partial size: Malvern particle size analyzer；The amount of residual formaldehyde, with ultraviolet light spectrophotometric determination；Limit stress micro-control system
System (Model 403A) measurement；Moisture measurement is executed according to GB/T 6283-1986.
Embodiment 1
A kind of bivalve layer pyrethroids microcapsules of the present embodiment, composition of raw materials such as table 1.
Table 1
Specific preparation process and applying step in coating are as follows:
(1) preparation process of melamine performed polymer: melamine and formalin are weighed by formula, (first plus after melamine
Add formaldehyde) it is stirred in three-necked flask, it is 8~9 that qs pH adjuster triethylamine regulation system pH value, which is added, by melamine
Amine and formaldehyde mixed solution are heated and are stirred in 65 DEG C of water-baths, system bleach after about 10min, are added and the matter such as formalin
The distilled water of amount, the water-soluble melamine performed polymer for 50min can be obtained transparent low molecular weight that the reaction was continued.
(2) preparation process of melamine resin and carbamide resin double shell microcapsule: emulsifier Arab tree is weighed by formula
Rubber powder and chain extender triethylene tetramine, are added in beaker together with melamine performed polymer, 600mL distilled water are added, in room temperature
Under stir at low speed until all dissolutions, adjust pH=4 with pH adjusting agent dilute hydrochloric acid, then by curing agent Desmodur L-75 and remove
The homogeneous mixture of worm chrysanthemum element and ethyl phenylacetate is added thereto, and with mulser, ice bath emulsifies 20min under 400r/min revolving speed.
Bath temperature is risen to 65 DEG C again, turbulences paddle is used instead and is stirred under 200r/min revolving speed.After the reaction was continued 3h, with pH tune
It saves agent sodium hydroxide solution (10%) and adjusts pH value=10, stop reaction, obtain melamine resin and carbamide resin bivalve layer pyrethroids
Microcapsules.
(3) obtained microcapsules in mass ratio 5~10% preparation process of mosquito proof epoxy coating: are added to ring
It in oxygen cold coating, is uniformly mixed, obtains showing slightly muddy mosquito proof epoxy coating.
The pyrethroids microcapsules prepared in the present embodiment be white or canescence uniform spherome, about 100 μm of average grain diameter；Water
Divide mass content≤5%；Limit stress about 300mN, good mechanical property；Residual formaldehyde content is lower than 5%.Antibiont effect is
1 year.
Embodiment 2
A kind of bivalve layer pyrethroids microcapsules of the present embodiment, composition of raw materials such as table 2.
Table 2
Specific preparation process and applying step in coating are as follows:
(1) preparation process of melamine performed polymer: melamine and formalin are weighed by formula, (first plus after melamine
Add formaldehyde) it is stirred in three-necked flask, it is 8~9 that qs pH adjuster triethylamine regulation system pH value, which is added, by melamine
Amine and formaldehyde mixed solution are heated and are stirred in 65 DEG C of water-baths, system bleach after about 10min, are added and the matter such as formalin
The distilled water of amount, the water-soluble melamine performed polymer for 50min can be obtained transparent low molecular weight that the reaction was continued.
(2) preparation process of melamine resin and carbamide resin double shell microcapsule: emulsifier Arab tree is weighed by formula
Rubber powder and chain extender polyetheramine D230, are added in beaker together with melamine performed polymer, 600mL distilled water are added, in room temperature
Under stir at low speed until all dissolutions, adjust pH=4 with pH adjusting agent dilute hydrochloric acid, then by curing agent Desmodur L-75 and core
The homogeneous mixture of material Permethrin and ethyl acetate is added thereto, and with mulser, ice bath emulsifies 20min under 800r/min revolving speed.
Bath temperature is risen to 65 DEG C again, turbulences paddle is used instead and is stirred under 300r/min revolving speed.After the reaction was continued 3h, with pH tune
It saves agent sodium hydroxide solution (10%) and adjusts pH value=10, stop reaction, obtain melamine resin and carbamide resin bivalve layer pyrethroids
Microcapsules.
(3) obtained microcapsules in mass ratio 5~10% preparation process of mosquito proof polyurethane coating: are added to poly- ammonia
It in ester paint, is uniformly mixed, obtains showing slightly muddy mosquito proof polyurethane coating.
The pyrethroids microcapsules prepared in the present embodiment be white or canescence uniform spherome, 0.1~300 μm of average grain diameter；
Biodiversity content≤5%；Limit stress about 200mN, good mechanical property；Residual formaldehyde content is lower than 5%.Antibiont effect
It is 1 year.
Embodiment 3
A kind of bivalve layer pyrethroids microcapsules of the present embodiment, composition of raw materials such as table 3.
Table 3
Specific preparation process and applying step in coating are as follows:
(1) preparation process of melamine performed polymer: melamine and formalin are weighed by formula, (first plus after melamine
Add formaldehyde) it is stirred in three-necked flask, it is 8~9 that qs pH adjuster triethylamine regulation system pH value, which is added, by melamine
Amine and formaldehyde mixed solution are heated and are stirred in 65 DEG C of water-baths, system bleach after about 10min, are added and the matter such as formalin
The distilled water of amount, the water-soluble melamine performed polymer for 50min can be obtained transparent low molecular weight that the reaction was continued.
(2) preparation process of melamine resin and carbamide resin double shell microcapsule: emulsifier Arab tree is weighed by formula
Rubber powder and chain extender polyetheramine D400, are added in beaker together with melamine performed polymer, 600mL distilled water are added, in room temperature
Under stir at low speed until all dissolutions, adjust pH=4 with pH adjusting agent dilute hydrochloric acid, then by curing agent Desmodur L-75 and core
The homogeneous mixture of material tetramethrin and chlorobenzene is added thereto, and with mulser, ice bath emulsifies 20min under 1000r/min revolving speed.Again
Bath temperature is risen to 65 DEG C, turbulences paddle is used instead and is stirred under 300r/min revolving speed.After the reaction was continued 3h, adjusted with pH
Agent sodium hydroxide solution (10%) adjusts pH value=10, stops reaction, obtains melamine resin and carbamide resin bivalve layer pyrethroids is micro-
Capsule.
(3) obtained microcapsules in mass ratio 5~10% preparation process of mosquito proof polyurethane coating: are added to poly- ammonia
It in ester paint, is uniformly mixed, obtains showing slightly muddy mosquito proof polyurethane coating.
The pyrethroids microcapsules prepared in the present embodiment be white or canescence uniform spherome, about 50 μm of average grain diameter；Water
Divide mass content≤5%；Limit stress about 150mN, good mechanical property；Residual formaldehyde content is lower than 5%.Antibiont effect is
1 year.
Embodiment 4
A kind of bivalve layer pyrethroids microcapsules of the present embodiment, composition of raw materials such as table 4.
Table 4
Specific preparation process and applying step in coating are as follows:
(1) preparation process of melamine performed polymer: melamine and formalin are weighed by formula, (first plus after melamine
Add formaldehyde) it is stirred in three-necked flask, it is 8~9 that qs pH adjuster triethylamine regulation system pH value, which is added, by melamine
Amine and formaldehyde mixed solution are heated and are stirred in 65 DEG C of water-baths, system bleach after about 10min, are added and the matter such as formalin
The distilled water of amount, the water-soluble melamine performed polymer for 50min can be obtained transparent low molecular weight that the reaction was continued.
(2) preparation process of melamine resin and carbamide resin double shell microcapsule: emulsifier Arab tree is weighed by formula
Rubber powder and chain extender diethylenetriamine, are added in beaker together with melamine performed polymer, 600mL distilled water are added, in room temperature
Under stir at low speed until all dissolutions, adjust pH=4 with pH adjusting agent dilute hydrochloric acid, then by curing agent Desmodur L-75 and core
The homogeneous mixture of material cypermethrin and ethyl acetate is added thereto, and with mulser, ice bath is emulsified under 1500r/min revolving speed
20min.Bath temperature is risen to 65 DEG C again, turbulences paddle is used instead and is stirred under 400r/min revolving speed.After the reaction was continued 3h,
PH value=10 are adjusted with pH adjusting agent sodium hydroxide solution (10%), stops reaction, obtains melamine resin and carbamide resin bivalve
Layer pyrethroids microcapsules.
(3) obtained microcapsules in mass ratio 5~10% preparation process of mosquito proof acrylic coating: are added to propylene
It in sour coating, is uniformly mixed, obtains showing slightly muddy mosquito proof acrylic coating.
The pyrethroids microcapsules prepared in the present embodiment be white or canescence uniform spherome, about 40 μm of average grain diameter；Water
Divide mass content≤5%；Limit stress about 100mN, good mechanical property；Residual formaldehyde content is lower than 5%.Antibiont effect is
1 year.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of bivalve layer pyrethroids microcapsules, it is characterised in that including following preparation step:
(1) melamine and formalin are added sequentially to be uniformly mixed in reactor, adding alkali regulation system pH value is 8
~9, it is then stirred to react in 65~70 DEG C to system bleach, adding water, the reaction was continued, obtains melamine performed polymer；
(2) melamine performed polymer, chain extender and emulsifier being added to the water, stirring and dissolving is uniform, and acid adding regulation system pH value is 1
~6, the homogeneous mixture of curing agent, pyrethroids and solvent is added, emulsifies and is stirred to react, after the reaction was completed plus alkali regulation system
PH value >=6 obtain the bivalve layer pyrethroids microcapsules.
2. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (1)
The formalin refers to that mass concentration is 37 ± 2% formalin, contained first in the melamine and formalin
The molar ratio of aldehyde is 1:(3~5), the addition water amount of water that the reaction was continued is 1~3 times of formalin quality.
3. a kind of preparation method of layer pyrethroids microcapsules in bivalve according to claim 1, it is characterised in that: step (1) and
Alkali described in step (2) is lithium hydroxide, potassium hydroxide, sodium hydroxide, calcium hydroxide, triethylamine, at least one in ammonium hydroxide
Kind；Acid described in step (2) is at least one of sulfuric acid, hydrochloric acid, oxalic acid, acetic acid, benzoic acid, formic acid, succinic acid.
4. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (1)
The time being stirred to react is 10~15min, and the addition water time that the reaction was continued is 20~50min.
5. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (2)
The chain extender is ethylenediamine, diethylenetriamine, triethylene tetramine, polyetheramine D230, polyetheramine D400,1,4- butanediol, gathers
At least one of ethylene glycol 400, cetomacrogol 1000, polyethylene glycol 2000；The emulsifier is gum arabic powder.
6. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (2)
The mass ratio that the melamine performed polymer, chain extender and emulsifier are added is 100:(5~10): (20~30).
7. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (2)
The curing agent is at least one of MDI performed polymer, TDI performed polymer, TDI tripolymer；The pyrethroids is pyrethrin, chlorine chrysanthemum
At least one of ester, tetramethrin, cypermethrin, decis, esbiothrin；The solvent be ethyl acetate,
The mixed solvent of one or more of butyl acetate, ethyl phenylacetate, chlorobenzene, dimethylbenzene.
8. a kind of preparation method of bivalve layer pyrethroids microcapsules according to claim 1, it is characterised in that: in step (2)
The emulsification and the specific steps being stirred to react are as follows:
First continuous emulsification reacts 20~50min under condition of ice bath and 400~2000r/min, then heats to 40~80 DEG C, changes
3~5h is stirred to react under 50~400r/min of turbulences paddle.
9. a kind of bivalve layer pyrethroids microcapsules, it is characterised in that: be prepared by method according to any one of claims 1 to 8
It arrives；The average grain diameter of the bivalve layer pyrethroids microcapsules is 0.1~300 μm.
10. a kind of application of the bivalve layer pyrethroids microcapsules as claimed in claim 9 in anti-mosquito coating, it is characterised in that described
Application process are as follows: bivalve layer pyrethroids microcapsules are added in coating by 5%~10% mass fraction, are uniformly mixed,
Obtain anti-mosquito coating.
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