CN101273722A - High-efficient cypermethrin suspension agent and preparation - Google Patents

Abstract

The invention discloses a suspending agent containing apha cypermethrin and a preparation method thereof. The suspending agent is formed by the matched stack of the following raw materials according to weight percentage: 5 to 15 percent of apha cypermethrin, 5 to 15 percent of imidacloprid, 3 to 6 percent of moistening dispersant, 0.2 to 2 percent of thickener, 2 to 5 percent of antifreeze, 0.5 to 1.5 percent of preservative, 0.2 to 0.6 percent of defoaming agent, 100 percent of complemental water, after weighed, all the raw materials are mixed for formulation in a sanding vessel. Besides active ingredients, most of the suspending agent is water without organic solvent, the suspending agent is not only transported and used safely, but also reduces pollution to environment and the cost of products and improves the effects of farm chemical, especially has good prevention effects on cabbage caterpillar and aphid on various crops.

Description

A kind of suspending agent that contains beta-cypermethrin and preparation method thereof

Technical field

The present invention relates to suspending agent of a kind of high-efficiency broad spectrum insects agent beta-cypermethrin and nicotinoids super-high-efficient low toxicity, low-residual Imidacloprid and preparation method thereof, belong to the formulations of pesticide manufacture field that is applied in pesticide producing and the chemical protection of plant.

Background technology

Beta-cypermethrin is novel pyrethroid insecticides, has extremely strong stomach toxicity and action of contace poison, active height, wide spectrum, quick-acting, the lasting period is longer; Imidacloprid is nicotinoids super-high-efficient, low toxicity, low-residual insecticide, and insect be difficult for to produce resistance, to characteristics such as people, animal, plant and natural enemies securities, and have tag, multiple actions such as stomach toxicity and interior suction.Behind the insect contact medicament, the nervous centralis normal conduction is obstructed, and makes its paralysis dead.Product quick-acting is good, higher preventive effect is promptly arranged in 1 day behind the medicine, and residual life reached about 25 days.Drug effect and temperature are proportionate, temperature height, good disinsection effect.Be mainly used in the control sucking pest.。Regular dosage form is missible oil or wetting powder.Cream preparation mainly adopts aromatic organic solvent to prepare, and wetting powder also has dust pollution in production and use.Because aromatic organic solvent such as toluene, dimethylbenzene, mixed benzene etc. are to the pollution problem of environment, environmental protection department has controlled this kind solvent, need not or lack the direction that has become development missible oil class agricultural chemicals with aromatic organic solvent as far as possible.

Suspending agent is the novel form that grew up in recent years, be water-insoluble solid agricultural chemicals or the dispersion of immiscible liquids agricultural chemicals in water or in the oil, the advantage of this formulation is evenly to mix dispersion with arbitrary proportion with water, be subjected to the influence of water quality little, easy to use, be difficult for contaminated environment, can directly or dilute the desirable formulation of spraying in the back.Preparation for processing can pass through waterproof pulverization, promptly auxiliary agent mixing porphyrizes such as former medicine, dispersant, wetting agent, water are made the suspension of high dispersive, continuous phase with sand mill, the particle mean size of its particle is generally about 2～3 μ m, improved the suspensibility of particle in aqueous medium greatly, strengthened the absorption of crops medicament.

Summary of the invention

The object of the invention is the active ingredient of beta-cypermethrin and Imidacloprid is combined, and a kind of suspending agent that contains beta-cypermethrin and preparation method thereof is provided, and its technical scheme of taking is:

This suspending agent is formed by following raw materials by weight percent assembly: beta-cypermethrin 5～15%, Imidacloprid 5～15%, wetting dispersing agent 3～6%, thickener 0.2～2%, antifreezing agent 2～5%, preservative 0.5～1.5%, defoamer 0.2～0.6%, water supplies 100%.

Wetting dispersing agent is by alkyl phenol formaldehyde resin polyoxyethylene ether (Nongru-700 #), the newborn 0201B of farming, calcium dodecyl benzene sulfonate (agricultural newborn 500#) triphen ethyl-phenol polyoxyethylene polyoxypropylene block polymer (farming breast 1601), sodium lignin sulfonate (wooden sodium), di-2-ethylhexylphosphine oxide naphthalene sulfonate (dispersant NNO), dispersing agent MF (Dispersant MF), one or more compositions among the dispersant HY-1 (styrene phenol formaldehyde resin polyoxyethylene ether phosphate salt and phosphate 500#).

Thickener is made up of in xanthans, carboxymethyl cellulose, the aluminium-magnesium silicate one or more.

Antifreezing agent is made up of in ethylene glycol, propane diols, glycerine, the urea one or more.

Preservative is by being made up of in formaldehyde, Sodium Benzoate, the sodium hydroxy methyl glycinate one or more.

Defoamer is organosilicon or n-octyl alcohol.

The preparation method of this suspending agent is as follows:

A) by following percentage by weight each raw material of weighing: beta-cypermethrin 5～15%, Imidacloprid 5～15%, wetting dispersing agent 3～6%, thickener 0.2～2%, antifreezing agent 2～5%, preservative 0.5～1.5%, defoamer 0.2～0.6%, water supplies 100%;

B) in the sand milling still, prepare suspending agent: beta-cypermethrin, Imidacloprid, wetting dispersing agent are joined in the sand milling still to mix with abrasive media 1: 1.1～1.2 together with the water that adds water inventory 70% grind, after grinding 2～2.5h, thickener, antifreezing agent and preservative and surplus water adding are modulated, obtain white homogeneous suspension liquid body, the adding defoamer separates soup with abrasive media both must this suspending agent.

This suspending agent is a kind of insecticide of high-efficiency broad spectrum safety, is dispersion with big water gaging, has reduced in use the pollution of environment, has protected environment and user's safety, and has avoided Imidacloprid to be difficult for the shortcoming of performance drug effect at low temperature.

Advantage of the present invention and good effect are:

1, reduced environmental pollution: aromatic organic solvent content and does not add organic solvent up to 45～70% in the conventional cream preparation in the suspending agent, and used wetting dispersing agent lacks than the consumption in the missible oil, is disperse phase with water, has reduced environmental pollution.

2, reduced production cost:, greatly reduce the cost of product because water has replaced aromatic organic solvent.

3, improved drug effect, enlarged insecticidal spectrum: adopt the substep wet grinding, particle diameter is thin, has improved drug effect, and cabbage caterpillar, aphid are all had good preventive effect, and has avoided Imidacloprid because the shortcoming of the low and difficult performance drug effect of temperature.

Embodiment

Below in conjunction with embodiment the present invention is described further:

Embodiment 1:

(1) raw material proportioning

This suspending agent is formed by following raw materials by weight percent assembly: beta-cypermethrin 5%, Imidacloprid 5%, agricultural newborn 500#1.5%, Dispersant MF 2.5%, xanthans 0.2%, aluminium-magnesium silicate 2%, ethylene glycol 2%, silicone defoaming agent 0.2%, running water supplies 100%.

(2) preparation method

In the sand milling still, prepare suspending agent: beta-cypermethrin, Imidacloprid, wetting dispersing agent are joined in the sand milling still to mix with abrasive media 1: 1.1～1.2 together with the water that adds water inventory 70% grind, after grinding 2～2.5h, thickener, antifreezing agent and preservative and surplus water adding are modulated, obtain white homogeneous suspension liquid body, the adding defoamer separates soup with abrasive media both must this suspending agent.

Embodiment 2:

(1) raw material proportioning

This suspending agent is formed by following raw materials by weight percent assembly: beta-cypermethrin 10%, Imidacloprid 10%, agricultural newborn 500#2%, Dispersant MF 3%, xanthans 0.18%, aluminium-magnesium silicate 1.8%, ethylene glycol 3%, silicone defoaming agent 0.2%, running water supplies 100%.

(2) preparation method: with embodiment 1 preparation method.

Embodiment 3:

(1) raw material proportioning

This suspending agent is formed by following raw materials by weight percent assembly: beta-cypermethrin 15%, Imidacloprid 15%, agricultural newborn 500#1.5%, Dispersant MF 3.5%, xanthans 0.15%, aluminium-magnesium silicate 1.5%, ethylene glycol 3%, n-octyl alcohol 0.2%, running water supplies 100%.

(2) preparation method: with embodiment 1 preparation method.

The every detection index of the suspending agent that contains beta-cypermethrin that makes by the foregoing description is as follows, meets the suspending agent index request.

Fineness

Preface pH suspensibility viscosity divides the steady heat storage of cold scattering storage steady

(44 pourabilities

Number value/%/(Pas) property is qualitative

μm)/％

1 6.3 93 0.55 99 is good qualified

2 6.2 95 0.53 99 is good qualified

3 6.3 95 0.56 99 is good qualified

Claims (7)

1, a kind of suspending agent that contains beta-cypermethrin, it is characterized in that this suspending agent is formed by following raw materials by weight percent assembly: beta-cypermethrin 5～15%, Imidacloprid 5～15%, wetting dispersing agent 3～6%, thickener 0.2～2%, antifreezing agent 2～5%, preservative 0.5～1.5%, defoamer 0.2～0.6%, water supplies 100%.

2, a kind of suspending agent that contains beta-cypermethrin according to claim 1 is characterized in that: described wetting dispersing agent is made up of among alkyl phenol formaldehyde resin polyoxyethylene ether, agricultural newborn 0201B, calcium dodecyl benzene sulfonate, triphen ethyl-phenol polyoxyethylene polyoxypropylene block polymer, sodium lignin sulfonate, di-2-ethylhexylphosphine oxide naphthalene sulfonate, dispersing agent MF, the dispersant HY-1 one or more.

3, a kind of suspending agent that contains beta-cypermethrin according to claim 1 is characterized in that: described thickener is made up of in xanthans, carboxymethyl cellulose, the aluminium-magnesium silicate one or more.

4, a kind of suspending agent that contains beta-cypermethrin according to claim 1 is characterized in that: described antifreezing agent is made up of in ethylene glycol, propane diols, glycerine, the urea one or more.

5, a kind of suspending agent that contains beta-cypermethrin according to claim 1 is characterized in that: described preservative is made up of in formaldehyde, Sodium Benzoate, the sodium hydroxy methyl glycinate one or more.

6, a kind of suspending agent that contains beta-cypermethrin according to claim 1, it is characterized in that: described defoamer is organosilicon or n-octyl alcohol.

7, a kind of a kind of preparation method who contains the suspending agent of beta-cypermethrin as claimed in claim 1 is characterized in that by following step preparation:

A) by following percentage by weight each raw material of weighing: beta-cypermethrin 5～15%, Imidacloprid 5～15%, wetting dispersing agent 3～6%, thickener 0.2～2%, antifreezing agent 2～5%, preservative 0.5～1.5%, defoamer 0.2～0.6%, water supplies 100%;

B) in the sand milling still, prepare suspending agent: beta-cypermethrin, Imidacloprid, wetting dispersing agent are joined in the sand milling still to mix with abrasive media 1: 1.1～1.2 together with the water that adds water inventory 70% grind, after grinding 2～2.5h, thickener, antifreezing agent and preservative and surplus water adding are modulated, obtain white homogeneous suspension liquid body, the adding defoamer separates soup with abrasive media both must this suspending agent.