CN102578093A - Mesotrione water dispersible granule and preparation method thereof - Google Patents

Abstract

The invention relates to a mesotrione water dispersible granule, which belongs to the field of pesticide chemical herbicide manufacture and comprises the following ingredients in percentage by weight: 50 to 80 percent of mesotrione, 2 to 5 percent of anionic alkyl naphthalene sulfonate wetting agents, 3 to 4 percent of anionic lignin sulfonate dispersing agents, 3 to 5 percent of bonding agent polysaccharide, 2 to 8 percent of disintegrating agents, 3 to 6 percent of dispersing aid polycarboxylate and a proper number of inert fillers for supplanting to 100 percent. According to a preparation method of the mesotrione water dispersible granule, finished products can be obtained through six work procedures such as crushing, bonding agent dissolution, stirring, extrusion to obtain granules, baking and sieving. The mesotrione water dispersible granule overcomes the defects that the quality of the mesotrione suspension is unstable, and the package and the metering are not easy. The mesotrione water dispersible granule has the advantages that green and environment-friendly effects are realized, and the quality is stable.

Description

A kind of mesotrione water dispersible granules and preparation method thereof

Technical field:

The present invention relates to technical field of pesticide preparations, more specifically to a kind of weed killer herbicide mesotrione water dispersible granules and preparation method thereof.

Background technology:

Pesticide water dispersible granules is an a kind of eco-friendly green formulation newly developed eighties; It is development on wetting powder and suspending agent basis, has good dispersion, and suspensibility is high; Be easy to metering; Advantage such as easy to use, friend peasant uses Shi Buhui and as wetting powder, produces dust, also the layering caking occurs unlike the suspending agent that kind during storage.

Mesotrione is that a kind of high efficiency corn field weed is prevented and kill off medicament; It is another three ketones kind of coming through sulphur humulone structural modification; But be used for before the corn field bud cauline leaf spraying behind native list processing or the bud, mainly prevent and kill off part grassy weeds such as important broad leaved weed in most of fields such as Siberian cocklebur, Tong fiber crops, lamb's-quarters, amaranth knotweed, black nightshade, three leaf artemisiifolias and low age barnyard grass, lady's-grass, arm shape grass, green foxtail.

The present formulation of mesotrione has only suspending agent, and suspending agent has package metro-measuring inconvenience, stores to be prone to the layering caking; Shortcomings such as effective herbicidal constituents facile hydrolysis; So develop easy to usely, steady quality, the mesotrione water dispersible granules of environmental protection are very necessary.

Summary of the invention:

The object of the invention is exactly the deficiency to prior art, and a kind of mesotrione water dispersible granules and preparation method thereof is provided, and it can produce fast disintegration; Higher suspension, the mesotrione water dispersible granules of the strong excellent performance that disperses is for friend peasant provides a kind of new corn field herbicide formulation; It is unstable that it has overcome mesotrione suspending agent quality; Be not easy to the shortcoming of package metro-measuring, have environmental protection, stay-in-grade advantage.

Technological solution of the present invention is following:

A kind of mesotrione water dispersible granules, each set of dispense ratio is by weight: mesotrione: 50-80%, anion alkylnaphthalene sulfonate wetting agent 2-5%, anion lignin sulfonic acid dipersant 3-4%, binding agent polysaccharide 3-5%, disintegrant 2-8%, dispersion aids polycarboxylate 3-6%, inert filler are mended to 100%.

Said anion alkylnaphthalene sulfonate wetting agent is selected from a kind of of di naphthalene sulfonate, diisopropyl naphthalene sulfonate, Nekal BX, diisobutyl naphthalene.

Said anion lignin sulfonic acid dipersant is selected from a kind of of Polyfon H, Polyfon WP, YUS-WG4, Marasperse I.

Said binding agent polysaccharide is selected from glucose or lactose.

Said disintegrant is selected from a kind of of urea, sulphur ammonium, anhydrous sodium sulfate, borax.

Said dispersion aids is selected from a kind of among TERSPERSE 2700, YUS-WG5, the Sokalan CP.

A kind of in kaolin, diatomite, bentonite, precipitated calcium carbonate seen in the choosing of said inert filler.

The preparation method of mesotrione water dispersible granules,

A. mix in proportion except that binding agent polysaccharide 3-5% by prescription mesotrione: 50-80%, anion alkylnaphthalene sulfonate wetting agent 2-5%, anion lignin sulfonic acid dipersant 3-4%, binding agent polysaccharide 3-5%, disintegrant 2-8%, dispersion aids polycarboxylate 3-6%, inert filler benefit each composition in 100%, be crushed to fineness greater than 325 orders with airslide disintegrating mill;

B. the binding agent adding is accounted in the running water of total weight of material 18%, stirring and dissolving is even;

C. above-mentioned adhesive solution is joined in the powder that has crushed and stir;

D. the material that stirs is dropped in the extruder grain and be squeezed into the cylindrical particle that diameter is 1MM;

E. with boiled bed dryer above-mentioned wet stock is dried, keep between the residual moisture 1-2%;

F. the material with oven dry gets product to the 12-30 order to particle with bolting.

Beneficial effect of the present invention is: prescription that the present invention is used and preparation method can produce fast disintegration fully, higher suspension, and the mesotrione water dispersible granules of the strong excellent performance that disperses is for friend peasant provides a kind of new corn field herbicide formulation.It is unstable that it has overcome mesotrione suspending agent quality, is not easy to the shortcoming of package metro-measuring, has environmental protection, stay-in-grade advantage.

Embodiment:

Embodiment 1:

Preparation method: above-mentioned except that glucose, the input in the mixer by load weighted each component of proportioning mixed; For use with being crushed to 325 orders in the material input air flow cracker that mixes; To account in the running water of total weight of material 18% by the load weighted glucose input of proportioning and stir; This D/W put in the material that crushes stir, this material is dropped into the cylindrical particle that is squeezed into diameter 1MM in extruder grain, dry between the residual moisture 1-2% with boiled bed dryer again; To the 12-30 order, being up to the standards gets product to particle in bolting again.Through detecting mesotrione content is 50.2%, and moisture content is 1.5%, and PH is 6.5,99% through 325 order testing sieves, complete wetting in 45 seconds, and disintegration fully in 35 seconds, suspensibility 90% in the 342PPM standard hard water, redispersibility is qualified, and 54 degree heat storages 14 days are qualified.

Embodiment 2:

The preparation method is replaced with lactose with glucose and gets final product with embodiment 1.Through detecting mesotrione content is 60.1%, and moisture content is 1.2%, and PH is 6.0,99% through 325 order testing sieves, complete wetting in 50 seconds, and disintegration fully in 35 seconds, suspensibility 90% in the 342PPM standard hard water, redispersibility is qualified, and 54 degree heat storages 14 days are qualified.

Embodiment 3:

The preparation method is replaced with lactose with glucose and gets final product with embodiment 1.Through detecting mesotrione content is 75.5%, and moisture content is 1.3%, and PH is 6.8,99% through 325 order testing sieves, complete wetting in 50 seconds, and disintegration fully in 45 seconds, suspensibility 95% in the 342PPM standard hard water, redispersibility is qualified, and 54 degree heat storages 14 days are qualified.

Embodiment 4:

The preparation method is replaced with lactose with glucose and gets final product with embodiment 1.Through detecting mesotrione content is 80.1%, and moisture content is 1.3%, and PH is 6.0,99% through 325 order testing sieves, complete wetting in 40 seconds, and disintegration fully in 55 seconds, suspensibility 90% in the 342PPM standard hard water, redispersibility is qualified, and 54 degree heat storages 14 days are qualified.

Disintegrative is measured and is adopted the measuring graduates experimental method: in the 100mL tool plug graduated cylinder that fills 90mL distilled water, add sample particle 0.5g down in 25 ℃; Clamp the middle part of graduated cylinder afterwards; Clog nozzle, with the speed of 8r/min rotate around the center up to sample in water fully till the disintegration writing time be disintegration time.

Dispersed mensuration adopts CIPAC MT 174 standard methods to measure.

Claims (8)

1. mesotrione water dispersible granules, it is characterized in that: each set of dispense ratio is by weight: mesotrione: 50-80%, anion alkylnaphthalene sulfonate wetting agent 2-5%, anion lignin sulfonic acid dipersant 3-4%, binding agent polysaccharide 3-5%, disintegrant 2-8%, dispersion aids polycarboxylate 3-6%, inert filler are mended to 100%.

2. mesotrione water dispersible granules according to claim 1 is characterized in that: anion alkylnaphthalene sulfonate wetting agent is selected from a kind of of di naphthalene sulfonate, diisopropyl naphthalene sulfonate, Nekal BX, diisobutyl naphthalene.

3. mesotrione water dispersible granules according to claim 1 is characterized in that: anion lignin sulfonic acid dipersant is selected from a kind of of Polyfon H, Polyfon WP, YUS-WG4, Marasperse I.

4. according to mesotrione water dispersible granules according to claim 1, it is characterized in that: the binding agent polysaccharide is selected from glucose or lactose.

5. mesotrione water dispersible granules according to claim 1 is characterized in that: disintegrant is selected from a kind of of urea, sulphur ammonium, anhydrous sodium sulfate, borax.

6. mesotrione water dispersible granules according to claim 1 is characterized in that: dispersion aids is selected from a kind of among TERSPERSE 2700, YUS-WG5, the Sokalan CP.

7. mesotrione water dispersible granules according to claim 1 is characterized in that: a kind of in kaolin, diatomite, bentonite, precipitated calcium carbonate seen in inert filler choosing.

8. the preparation method of mesotrione water dispersible granules is characterized in that:

A. mix in proportion except that binding agent polysaccharide 3-5% by prescription mesotrione: 50-80%, anion alkylnaphthalene sulfonate wetting agent 2-5%, anion lignin sulfonic acid dipersant 3-4%, binding agent polysaccharide 3-5%, disintegrant 2-8%, dispersion aids polycarboxylate 3-6%, inert filler benefit each composition in 100%, be crushed to fineness greater than 325 orders with airslide disintegrating mill;

B. the binding agent adding is accounted in the running water of total weight of material 18%, stirring and dissolving is even;

C. above-mentioned adhesive solution is joined in the powder that has crushed and stir;

D. the material that stirs is dropped in the extruder grain and be squeezed into the cylindrical particle that diameter is 1MM;

E. with boiled bed dryer above-mentioned wet stock is dried, keep between the residual moisture 1-2%;

F. the material with oven dry gets product to the 12-30 order to particle with bolting.