CN101606540A - High-performance cyhalothrin pesticide aqueous emulsion and preparation method thereof - Google Patents

Abstract

The present invention relates to a kind of high-performance cyhalothrin pesticide aqueous emulsion, this aqueous emulsion is to be mixed and made into by following raw materials by weight percent: the solvent 0.5%～4% and the excess water of gamma cyhalothrin 2.5%～10%, barbadosnut seed biodiesel 10%～70%, emulsifier 3%～10%, gamma cyhalothrin.Pesticide emulsion in water of the present invention is little to the pollution of environment, and character is very stable, can dilute with 2000～2500 times of water, and can tolerate 0～65 ℃ of temperature, aqueous emulsion is not stratified, gamma cyhalothrin and barbadosnut seed biodiesel are share, and gamma cyhalothrin is had synergistic effect, are fit to large-scale promotion application.

Description

High-performance cyhalothrin pesticide aqueous emulsion and preparation method thereof

Technical field

The present invention relates to a kind of pesticide emulsion in water, particularly a kind of preparation method who contains pesticide emulsion in water and this aqueous emulsion of gamma cyhalothrin.

Background technology

Human control agricultural disease, the main means of insect pest etc. are to adopt chemical control, chemical pesticide plays important effect to the increasing both production and income that guarantees agricultural, yet along with missible oil, a large amount of uses of the old formulations of agricultural chemicals such as wetting powder, a large amount of organic solvents such as toluene that it contains, dimethylbenzene etc. have brought serious pollution to natural environment, in environmental requirement strict more today, the cry that reduces pesticide pollution in the world is more and more strong, should not greatly develop missible oil again, old formulation such as wetting powder, press for some safety of exploitation, novel form efficiently, thus microemulsion has appearred, suspending agent, aqueous solvent, microcapsule formulations, water-dispersible granules, emulsifiable concentrate, pesticide slow-releasing agent, many novel forms such as multi-functional mix preparation.

Gamma cyhalothrin, claim Cyhalothrin, cyhalothrin again, it is a kind of Green Chemistry agricultural chemicals of high-efficiency low-toxicity, have extremely strong stomach toxicity and action of contace poison, the desinsection wide spectrum, insect and evil mite to sucking mouth parts have certain preventive effect, and be lower to the toxicity of beneficial insect, is used for the control of the various pests of various crop.Though had water-base preparation to occur at present, the formulation of using is still based on 2.5% or 5% missible oil.Because active constituent content is low, consumption of organic solvent has caused huge pressure up to more than 80% to environment.Thereby the novel form of developing alternative missible oil that can large-scale promotion application has great realistic significance to environmental protection.

Summary of the invention

Technical problem to be solved by this invention provides and a kind ofly can alleviate environmental pollution, and the pesticide emulsion in water that contains gamma cyhalothrin of stable in properties, and the preparation method of this aqueous emulsion is provided.

The present invention solves the problems of the technologies described above with following technical scheme: the pesticide emulsion in water that the present invention contains gamma cyhalothrin is that the mixed raw material by following components by weight percentage becomes: the solvent 0.5%～4% and the excess water of gamma cyhalothrin 2.5%～10%, barbadosnut seed biodiesel 10%～70%, emulsifier 3%～10%, gamma cyhalothrin.

The optimum ratio of above-mentioned raw materials is: the solvent 0.5%～4% and the excess water of gamma cyhalothrin 2.5%～10%, barbadosnut seed biodiesel 20%～50%, emulsifier 3%～10%, gamma cyhalothrin.

Described emulsifier is non-ionic surface active agent or anion surfactant or both mixtures.

Described non-ionic surface active agent is OP or Cremophor RH40 or Tween-80.

Described anion surfactant is agricultural newborn 601#, agricultural newborn 500# or Nongru-700 #.

The solvent of described gamma cyhalothrin is cyclohexanone or dimethyl formamide.

The preparation method that the present invention contains the pesticide emulsion in water of gamma cyhalothrin is:

(1) get gamma cyhalothrin, add solvent, stir and make its dissolving, make solution (I), standby;

(2) get emulsifier and barbadosnut seed biodiesel, stir, make solution (II), adjust pH to 3.0～5.0, standby;

(3) solution (I) is joined in the solution (II), stir, add deionized water then, high-speed stirred is even, gets product.

The present invention adopts the barbadosnut seed biodiesel as insecticides adjuvant, can alleviate organic solution in the agricultural chemicals to the pollution of environment, with gamma cyhalothrin and barbadosnut seed biodiesel after adding a small amount of emulsifier and solvent, can form very stable aqueous emulsion, can dilute with 2000～2500 times of water, and can tolerate 0～65 ℃ of temperature, aqueous emulsion is not stratified; And gamma cyhalothrin and barbadosnut seed biodiesel are share, and gamma cyhalothrin is had synergistic effect, are fit to large-scale promotion application.

Embodiment

Prepare that the barbadosnut seed biodiesel is meant fatty acid methyl ester or the ethyl ester that barbadosnut seed oil generates in the raw material of pesticide emulsion in water of the present invention after esterification, prepare biopesticide with it as auxiliary agent, can reduce organic solvent in the preparation to the pollution of environment and the use of poisonous surfactant or other auxiliary agent, also can have significant synergies to insect, and order has overcome the single shortcoming of using insect to be easy to generate resistance of chemical pesticide, have efficient, low toxicity, low-residual, not polluting advantages such as agricultural product and environment, is toluene, the ideal substitute of insecticides adjuvants such as dimethylbenzene.

Below be specific embodiments of the invention:

Embodiment 1

(1) get gamma cyhalothrin 25g, add cyclohexanone 5ml, stir and make dissolving, make solution (I), standby;

(2) get agricultural newborn 601#60ml and barbadosnut seed biodiesel 100ml, stir,, make solution (II) with several 10% phosphorus acid for adjusting pH value to 3.0, standby;

(3) solution (I) is joined in the solution (II), stir, add the deionized water of about 810ml then, high-speed stirred is even, can make product 1000ml of the present invention.

Embodiment 2

(1) get gamma cyhalothrin 100g, add dimethyl formamide 40ml, stir and make dissolving, make solution (I), standby;

(2) get Tween-80 70ml and barbadosnut seed biodiesel 200ml, stir,, make solution (II) with several 20% vinegar acid for adjusting pH value to 3.5, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 590ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 3

(1) get gamma cyhalothrin 25g, add cyclohexanone 15ml, stir and make dissolving, make solution (I), standby;

(2) get agricultural newborn 500# 80ml and barbadosnut seed biodiesel 300ml, stir,, make solution (II) with several 10% phosphorus acid for adjusting pH value to 4.0, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 580ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 4

(1) get gamma cyhalothrin 75g, add dimethyl formamide 35ml, stir and make dissolving, make solution (I), standby;

(2) get Cremophor RH40 100ml and barbadosnut seed biodiesel 400ml, stir,, make solution (II) with several 20% vinegar acid for adjusting pH value to 5.0, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 390ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 5

(1) get gamma cyhalothrin 75g, add cyclohexanone 25ml, stir and make dissolving, make solution (I), standby;

(2) get Nongru-700 # 90ml and barbadosnut seed biodiesel 500ml, stir,, make solution (II) with several 10% phosphorus acid for adjusting pH value to 4.5, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 310ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 6

(1) get gamma cyhalothrin 50g, add dimethyl formamide 30ml, stir and make dissolving, make solution (I), standby;

(2) get non-ionic surface active agent OP 30ml and barbadosnut seed biodiesel 600ml, high-speed stirred is even, with several 20% vinegar acid for adjusting pH value to 4.0, makes solution (II), and is standby;

(3) solution (I) is joined in the solution (II), stir, add the about 290ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 7

(1) get gamma cyhalothrin 50g, add cyclohexanone 20ml, stir and make dissolving, make solution (I), standby;

(2) get agricultural newborn 601# 40ml, agricultural newborn 500# 10ml and barbadosnut seed biodiesel 650ml, stir,, make solution (II) with several 10% phosphorus acid for adjusting pH value to 3.5, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 230ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Embodiment 8

(1) get gamma cyhalothrin 25g, add cyclohexanone 10ml, stir and make dissolving, make solution (I), standby;

(2) get agricultural newborn 601# 30ml, Nongru-700 # 10ml and barbadosnut seed biodiesel 700ml, stir,, make solution (II) with several 20% vinegar acid for adjusting pH value to 5.0, standby;

(3) solution (I) is joined in the solution (II), stir, add the about 225ml to 1000ml of deionized water then, high-speed stirred is even, can make product of the present invention.

Pesticide emulsion in water character of the present invention is very stable, can dilute with 2000～25000 times of water, and can tolerate 0～54 ℃ of temperature, and aqueous emulsion is not stratified; Detect through MALVERN ZETASIZER 1000HSA laser particle size analyzer, its particle size determination the results are shown in Table 1:

Table 1: unit: nm

Batch number	By density measurement	By volume measure	By quantitative measurement
				??20090501	??122.7	??120.3	??119.8
??20090502	??123.8	??124.4	??120.5
				??20090503	??121.5	??122.9	??122.1
Mean value	??122.7	??122.5	??120.8

Pesticide emulsion in water of the present invention shows that through the control cabbage caterpillar test of pesticide effectiveness gamma cyhalothrin and barbadosnut seed biodiesel are share, and gamma cyhalothrin is had synergistic effect.It the results are shown in Table 2:

Table 2: the test of pesticide effectiveness result who utilizes pesticide emulsion in water control cabbage caterpillar of the present invention

Annotate: the product 1 in the table 2 is 2500 times of dilutions of 5% efficient cyhalothrin emulsifiable concentrate, product 2 is 2500 times of dilutions of barbadosnut seed biodiesel, product 3 is 2500 times of dilutions of the product of the present invention pesticide emulsion in water that contains 5% gamma cyhalothrin and 65% barbadosnut seed biodiesel, and product 4 is clear water.

Claims (6)

1. high-performance cyhalothrin pesticide aqueous emulsion is characterized in that it is that mixed raw material by following components by weight percentage becomes: the solvent 0.5%～4% and the excess water of gamma cyhalothrin 2.5%～10%, barbadosnut seed biodiesel 10%～70%, emulsifier 3%～10%, gamma cyhalothrin.

2. high-performance cyhalothrin pesticide aqueous emulsion according to claim 1 is characterized in that: described emulsifier is non-ionic surface active agent or anion surfactant or both mixtures.

3. high-performance cyhalothrin pesticide aqueous emulsion according to claim 2 is characterized in that: described non-ionic surface active agent is OP or Cremophor RH40 or Tween-80.

4. high-performance cyhalothrin pesticide aqueous emulsion according to claim 2 is characterized in that: described anion surfactant is agricultural newborn 601#, agricultural newborn 500# or Nongru-700 #.

5. high-performance cyhalothrin pesticide aqueous emulsion according to claim 1 is characterized in that: the solvent of described gamma cyhalothrin is cyclohexanone or dimethyl formamide.

6. the preparation method of a high-performance cyhalothrin pesticide aqueous emulsion is characterized in that:

The raw materials by weight proportioning that this method adopts is: the solvent 0.5%～4% and the excess water of gamma cyhalothrin 2.5%～10%, barbadosnut seed biodiesel 10%～70%, emulsifier 3%～10%, gamma cyhalothrin.

The preparation technology of this method is:

(1) get gamma cyhalothrin, add solvent, stir and make its dissolving, make solution (I), standby;

(2) get emulsifier and barbadosnut seed biodiesel, stir, make solution (II), adjust pH to 3.0～5.0, standby;

(3) solution (I) is joined in the solution (II), stir, add deionized water then, high-speed stirred is even, gets product.