UA148379U - METHOD OF PREPARATION OF HERBICIDE COMPOSITION IN THE FORM OF OIL DISPERSION - Google Patents

Abstract

A method of preparing a herbicidal composition in the form of an oil dispersion containing the active ingredient nicosulforone and excipients, namely: a suspending agent based on bentonite, a solvent methyl oleate and an emulsifier, comprises mixing the ingredients. The oil dispersion further contains the active ingredients 2,4-D 2 ethylhexyl ether and florasulam, as a suspending agent using organobentonite, and as an emulsifier using dodecylbenzene calcium sulfonate and vegetable oil ethoxylate in the following ratio, wt. %: 2,4-D 2 ethylhexyl ether 15-70, florasulam 0.05-1.2, nicosulfuron 3-10, dodecylbenzene calcium sulfonate 1-7, ethoxylate of vegetable oil 7-16, organobentonite 1 3, methyl oleate 20-40 . First, the auxiliary ingredients are mixed in the above proportions, namely: vegetable oil ethoxylate, calcium dodecylbenzene sulfonate, organobentonite and methyl oleate, and placed in a reactor with a stirrer, heated to 19-20 ° C with constant stirring for 30 minutes, while rotating stirrers are 1000 vol. min, then add the active ingredients 2,4-D 2 ethylhexyl ether, florasulam and nicosulfuron in the above amount, stirred until complete dissolution of the ingredients for 30-120 minutes.

Description

The useful model belongs to agriculture, namely to technologies for obtaining herbicidal compositions in the form of an oil dispersion, and can be used in the preparation of solutions against dicotyledonous and cereal weeds in corn crops.

Oil-based agrochemical concentrates are used for agrochemically active substances that are insoluble in oil (and usually also insoluble in water or other traditionally used solvents). Such oil-based systems usually include agrochemical active substances in the form of a dispersion of solid particles in the oil, which may include surfactants to facilitate the formation of an emulsion when diluted in water for spraying and/or to improve the dispersion of the solid active substance in the oil. In the modern agrochemical market, the development of new technologies and new preparative forms containing multiple active ingredients and their necessary solvents, antidotes and/or adjuvants, etc., is becoming commonplace. to achieve the optimal spectrum, effect and efficiency of delivery to the plant, which subsequently makes the stability of the preparation form more and more problematic. Therefore, technologies that can effectively isolate, prevent, or eliminate adverse reactions or interactions between incompatible ingredients often play a key role in obtaining a successful product. Consumers in general consider liquid preparative forms to be the best, given the ease of handling them during measurement, pumping, dilution and spraying operations. Oil dispersions (MD) are one type of liquid formulation and are defined as stable suspensions of active ingredients in a water-immiscible liquid that may contain other dissolved active ingredients and are intended for dilution with water before use. Preparative forms in the form of oil dispersions have recently become more important in modern scientific studies of preparative forms.

Terms and definitions 2,4-d 2-ethylhexyl ether

Latin name: 2,4-O0 (2-eipuipehui)

Formula: С16Н22СИ203, structural formula m re Arch g st s cha y

З Methods of application: spraying. The method of penetration is a systemic pesticide. Chemical class: aryloxyalkanecarboxylic acids.

Physical and chemical properties: Chemically pure 2,4-D (2-ethylhexyl ether) - colorless viscous liquid. Soluble in organic solvents, in aqueous solutions it is quickly hydrolyzed to acid. According to other data, 2,4-D (2-ethylhexyl ether) is a non-viscous golden-yellow liquid with a sweet, slightly pungent odor.

Since only ethylhexyl alcohol is used in the preparation of the drug, the substance is homogeneous in composition and contains only C8 molecules (C8 ester content is about 98.7-99.095).

Description: 2,4-D (2-ethylhexyl ether) suppresses annual and a number of perennial dicot weeds that harm grain crops. Pesticides based on it easily and in a short time penetrate the tissues of weeds. In addition, they act against annual dicotyledonous plants resistant to 2,4-D acid.

Like other 2,4-D derivatives, the substance inhibits the process of photosynthesis. Hydrolytic breakdown of proteins, inulin and starch occurs. The supply of potassium, phosphorus and nitrogen to the plant is sharply reduced. Water exchange is disturbed, the state of turgor is lost, the plant withers. 2-ethylhexyl ether 2,4-D is widely used in the manufacture of combined preparations or for tank mixtures. Such combinations make it possible to reduce the consumption rates of components (each) by almost 30-5095, while obtaining the widest spectrum of action and significant biological effectiveness. Some combined drugs have synergistic properties (synergism).

Florasulam

The name in Latin is RiIogazzat

Formula C12NVEZM550, structural formula:

IS

IS

TO и Her -- Й и-- E a o r

Methods of application: spraying. The method of penetration is a systemic pesticide. Chemical class: triazolpyrimidines.

Physical and chemical properties: Florasulam - white crystals. It has no smell. At normal temperature, it is soluble in organic solvents.

Description: Florasulam has a high selectivity of action, which is achieved by a high rate of metabolism in cultivated plants, compared to weed species.

Florasulam has a systemic effect. It penetrates into plants through the leaves and roots, but does not penetrate into the grain. The mechanism of action consists in inhibition of acetolactate synthase. It is a key enzyme in the formation of valine, isoleucine and leucine.

Within 2-4 weeks, necrosis of leaves, discoloration of veins and chlorosis are observed.

The drug, one of the active ingredients of which is florasulam, is effective against creeping mustard, as well as against broad-leaved weeds, nightshade, mountain grass, woodlice, and cruciferous weeds.

Nicosulfuron

Latin name: MisozyTyhop.

Formula С15Н18М6065, structural formula:

From r uch 0; and:

St. I'm not Her And

M nych h7 M" zo" o nn

Methods of application: spraying. The method of penetration is a systemic pesticide. Chemical class: sulfonylureas.

Physical and chemical properties: chemically pure substance - colorless crystals. It has no smell.

Well soluble in organic solvents, except for hexane. It is quickly hydrolyzed by acids, stable in an alkaline environment.

Description: post-emergence herbicide for the control of a wide range of annual and perennial weeds, especially gumii and creeping wheatgrass in corn (consumption rate 40-60 g/ha). It is used against grass and dicotyledonous weeds, cruciferous and styrica.

Three months after processing biologically active residues in the soil layer 0-30 cm no

It turns out. The mechanism of herbicidal action is inhibition of acetolactate synthase. The plant mainly penetrates through the leaves.

A known method of preparing a herbicide composition based on nicosulfuron, accepted as the closest analogue, which contains 7.23 parts of nicosulfuron, a mixture of surfactants containing polyoxyethylene sorbitol tetraoleate as the main component and containing polyoxyethylene castor oil and the calcium salt of dodecylbenzenesulfonic acid: 10.35 parts. pp., ethoxylated tall fat amine (surfactant B): 15.53 ppm, bentonite-alkylamino complex: 1.03 ppm, urea: 3.11 ppm, a mixture of methylated oil from plant seeds and corn oil: 62.75 m.h.

The above components are mixed and the mixture is ground with moistening in a wet grinding mill for 15 minutes to prepare an oil suspension concentrate. Next, the obtained oil suspension concentrate is diluted with ion-exchange water and placed in a bath with circulation at the device that measures the size of particles (MISKOTKA5 NEA, model 9320-х100, NOMEMEG U), with further circulation for 5 minutes. The droplet size was measured to be 18 μm.

The disadvantages of the known composition and technology are the insufficient dispersion of the oil emulsion (the size of the drops is 17-23 microns), as a result of which the target properties of the herbicidal active substances are not fully used and the low stability of the working solution of the drug is observed, as well as the complexity of the process of obtaining the drug.

The task of the useful model is to simplify the technology of obtaining a herbicide composition in a form that allows to improve the quality of its working fluid, as well as to increase the stability during storage for a long time, to increase the yield of corn.

The problem is solved in the method of preparation of a herbicide composition in the form of an oil dispersion, which contains the active ingredient nicosulphoron and auxiliary substances, namely, a suspending agent based on bentonite, a methyl oleate solvent, an emulsifier, in which the ingredients are mixed, while, according to a useful model, an oil dispersion additionally contains the active ingredients 2,4-D 2 ethylhexyl ether and florasulam, organobentonite is used as a suspending agent, calcium dodecylbenzene sulfonate and vegetable oil ethoxylate are used as an emulsifier with the following ratio of components, weight. 90: 2,4-D 2 ethylhexyl ether 15-70, florasulam 0.05-1.2, nicosulfuron 3-10, calcium dodecylbenzene sulfonate 1-7, vegetable oil ethoxylate 7-16, organobentonite 1 3, methyl oleate 20-40 , while the auxiliary ingredients are first mixed in the above proportions, namely: vegetable oil ethoxylate, calcium dodecylbenzene sulfonate, organobentonite and methyl oleate, and placed in a reactor with a stirrer, heated to a temperature of 19-20 "C with constant stirring for 30 minutes, at the same time, the revolutions of the mixer are 1000 rpm, then the active ingredients are added: 2,4-D 2 ethylhexyl ether, florasulam and nicosulfuron in

From the above quantity, stir until the ingredients are completely dissolved within 30-120 minutes.

The combination of the above-mentioned ingredients contributes to the optimization of the rheological system of the composition, which stabilizes the oil dispersion against particle sedimentation, provides improved physical stability of preparative forms of agrochemical products in the form of an oil dispersion. Separation in the time of dissolution and mixing of additional and active substances increases the dispersion of the oil emulsion. The size of the drops is 3-5 microns.

The technical result is expressed in an increase in the maximum wettability of the leaf surface and a faster and deeper penetration of the drug into the plant due to the creation of an oil dispersion with a dispersion of the active substance of 3 μm, which ensures an increase in the biological effectiveness of the drug.

Method of cooking.

12 95 vegetable oil ethoxylate, 5 95 calcium dodecylbenzene sulfonate emulsifier, 1.2 95 organobentonite suspending agent, and 25.22 905 methyl oleate solvent are loaded into the reactor with constant stirring. All components are mixed at a temperature of 19-20 "C and high revolutions of the stirrer. Add the required amount of ingredients: 2,4-D 2 ethylhexyl ether, florasulam and nicosulfuron, and mix until complete dissolution within 30-120 minutes.

The use of the proposed useful model will simplify the preparation technology of the drug and obtain a new composition of increased efficiency and quality with a stable herbicidal effect, which is safe for crops.

Claims (1)

UTILITY MODEL FORMULA The method of preparing a herbicide composition in the form of an oil dispersion containing the active ingredient nicosulphoron and auxiliary substances, namely: a suspending agent based on bentonite, solvent methyl oleate and an emulsifier, in which the ingredients are mixed, which differs in that the oil dispersion additionally contains the active ingredients 2,4-D 2 ethylhexyl ether and florasulam, organobentonite is used as a suspending agent, and calcium dodecylbenzene sulfonate and vegetable oil ethoxylate are used as an emulsifier at the following ratio of components, wt. 90: 2,4-D 2 ethylhexyl ether 15-70, florasulam 0.05-1.2, because nicosulfuron 3-10, calcium dodecylbenzene sulfonate 1-7, vegetable oil ethoxylate 7-16, organobentonite 1 3, methyl oleate 20-40, while the auxiliary ingredients are first mixed in the above proportions, namely: vegetable oil ethoxylate, calcium dodecylbenzene sulfonate, organobentonite and methyl oleate, and placed in a reactor with a stirrer, heated to a temperature of 19-20 " With constant stirring for 30 minutes, while the revolutions of the stirrer are 1000 rpm, then add the active ingredients 2,4-D 2 ethylhexyl ether, florasulam and nicosulfuron in the amount specified above, stir until the ingredients are completely dissolved within 30-120 minutes. 0 KompyuternaverstkaM, Matseloi 00000000 SE "Ukrainian Institute of Intellectual Property", str. Glazunova, 1, m. Kyiv - 42, 01601