Method of producing microcapsules of pesticides by nonsolvent precipitation method

FIELD: chemistry.

SUBSTANCE: invention relates to microencapsulation, particularly microencapsulation of pesticides. The method consists in physical-chemical precipitation using two precipitants - butanol and ethanol. The microcapsule cladding is sodium carboxymethyl cellulose.

EFFECT: invention increases mass output of microcapsules while simplifying the process of producing microcapsules.

7 ex

 

The invention relates to the field of microencapsulation of pesticides.

Previously known methods for producing microcapsules of pesticides. Thus, in U.S. Pat. 2108036 Russian Federation IPC A01N 25/28, A01N 37/22, published 10.04.1998, describes a method for microencapsulated herbicide composition comprising acetochlor as the active ingredient and acceptable to him the antidote, enclosed in microcapsules obtained by the dispersion at room temperature, the active ingredient, and mixtures polymethylenepolyphenylisocyanate and isomeric 2,4 - and 2,6-tolylenediisocyanate taken in the ratio of 1.5 - 2:1 in an aqueous phase containing 1.0 to 1.5 wt.% protective colloid, preferably alkali metal lignosulfonate and 0.3 to 1.0 wt.% Surfactant, followed by heating the mixture up to 40-90°C and cooling to room temperature.

Disadvantages of the proposed method are dispersed in the aqueous phase, which complicates the process of production of microcapsules of drugs in polymers forming jellies in the aquatic environment at low concentrations in solution.

In Pat. 2089062 Russian Federation IPC A01N 25/28 published 10.09.1997, describes a method for microencapsulated pesticides according to the invention, based on the known method of microencapsulation, consisting of interfacial polycondensation polymethylenepolyphenylisocyanate and polyamine in the presence of pesticides is igno-active substances in the aquatic environment, containing surfactant, characterized in that the surfactant used ammonium salt of a partial ester of a copolymer of styrene and maleic anhydride (1:1) in an amount of 2-8 wt.% the number pesticide-active substances. As a pesticide, it is preferable to use metallacarboranes, propiconazol, diazinon.

The disadvantages of the invention to provide microcapsules by chemical method of interfacial polymerization, which consists of several stages, which makes the process long and complicates it, use as a surfactant compositions ammonium salt of a partial ester of a copolymer of styrene and maleic aldehyde in a certain ratio that can be replaced with a single connection such as OS-20.

In Pat. 2159037 Russian Federation IPC A01N 25/28, A01N 25/30, published 20.11.2000, describes microcapsules obtained by the polymerization reaction at the phase boundary, containing solid agrochemical material 0.1 to 55 wt.%, suspended in peremestivsheesya water organic liquid, from 0.01 to 10 wt.% non-ionic dispersant, active on the phase boundary and is not acting as an emulsifier. As agrochemical agent and organic liquid microcapsule may contain herbicide. As the polymer walls of the microcapsules contain a polymer based on a mixture of isocyanates or esterified modelinformation odnogo fluoropolymer. The method of producing microcapsules is getting agrochemical suspension agent in an organic liquid containing the dispersant and fluoropolymers, and introducing the resulting suspension in an aqueous phase containing a protective colloid and a surfactant, followed by stirring the mixture under high shear and regulation if necessary, the temperature and/or pH of the emulsion prior to the formation of microcapsules.

Disadvantages of the proposed method are the complexity of the execution of the technique because of the production of microcapsules by a method that includes several stages, the use of special equipment (wysokosciowe mixer), the duration of the process.

In Pat. WO/2010/137743 JP IPC A01N 25/28; A01N 51/00; A01P 7/04; B01J 13/16 published 02.12.2010, a method for the production of microcapsules containing pesticide compounds in the fatty acid ester, which delays the release timing of pesticide compounds in comparison with the conventional microcapsules. In the method of producing microcapsules includes:

1) maintaining a mixture of the pesticide compound with polyisocyanate from 20 to 60°C for 3 hours or more;

2) adding to the mixture of water containing polyols or polyamine, and preparations for the formation of liquid droplets in the water;

3) formation of a film of polyurethane or polyurea around the drops.

The disadvantages of these methods I have are the use of special equipment (rotary homogenizer), a multi-stage, which complicates the method of producing microcapsules and makes it long.

The closest method is the method proposed in U.S. Pat. 2165700 Russian Federation IPC A01N 25/28, A01N 53/00, A01N 57/00, published 27.04.2001, describes a method for microencapsulated insecticide, which is as follows: the solution mixture in an organic solvent composed of natural lipids and organophosphorus and/or a PYRETHROID insecticide in the weight ratio of 2-4:1, was dispersed in water to obtain the desired product. Using the proposed method allows to significantly simplify the process of encapsulation of insecticides and provides high quality insecticide preparation.

The disadvantage of the method proposed in U.S. Pat. 2165700 is a dispersion in water, which makes the proposed method applicable to the production of microcapsules of water-soluble drugs in water-soluble polymers.

The technical problem is to simplify the process of production of microcapsules of the drug in water-soluble polymers, increasing the yield by weight.

The solution of the technical problem is achieved by a method of producing microcapsules, characterized in that upon receipt of the microcapsules physico-chemical method for the deposition nerastvorim as precipitators are used butanol and ethanol, and in cachestorage microcapsules using sodium carboxymethyl cellulose, the retrieval process is carried out without special equipment.

A distinctive feature of the proposed method is the use of two precipitators - butanol and ethanol in obtaining microcapsules physico-chemical method for the deposition nerastvorim and sodium carboxymethyl cellulose as the shell of the microcapsules.

The result of the proposed method is to obtain microcapsules of pesticides at 25°C for 15 minutes.

Required for the reaction, the sodium carboxymethyl cellulose was industrial production.

EXAMPLE 1. Obtaining the microcapsules metolachlor in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of metolachlor dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of metolachlor independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,230 g of the microcapsules. The yield was 58%.

EXAMPLE 2. Obtaining microcapsules PR is miconazole + tebuconazole in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of propiconazole + tebuconazole dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of propiconazole + tebuconazole independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,230 g of the microcapsules. The yield was 58%.

EXAMPLE 3. Obtaining microcapsules of clopyralid in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of clopyralid dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of clopyralid independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT is 16 class long washed with acetone, dried in a desiccator over calcium chloride.

Received 0,235 g of the microcapsules. The yield was 59%.

EXAMPLE 4. Obtaining microcapsules of tributed in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of tributed dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of tribution independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,235 g of the microcapsules. The yield was 59%.

EXAMPLE 5. Obtaining microcapsules haloxyfop-p-methyl in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g haloxyfop-p-methyl is dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of haloxyfop-p-met the scrap independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,255 g of the microcapsules. The yield was 64%.

EXAMPLE 6. Obtaining microcapsules of fenoxaprop-p-ethyl in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of fenoxaprop-p-ethyl is dissolved in 0.5 ml DMSO and transferred to a solution of sodium carboxymethylcellulose in butanol. After the formation of fenoxaprop-p-ethyl independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,245 g of the microcapsules. The yield was 61%.

EXAMPLE 7. Obtaining microcapsules of clethodim in the sodium carboxymethyl cellulose, the ratio of 1:3

To 6 g of 5% solution of sodium carboxymethyl cellulose in butanol is added 0.01 g of the drug Is as surfactants. The resulting mixture was put on a magnetic stirrer and include mixing. 0.1 g of clethodim dissolved in 0.5 ml DMSO and the transfer of the t in a solution of sodium carboxymethylcellulose in butanol. After the formation of clethodim independent solid phase very slowly added dropwise 3 ml of ethanol and 1 ml of distilled water. The resulting suspension of microcapsules is filtered by the filter SCHOTT 16 class then washed with acetone, dried in a desiccator over calcium chloride.

Received 0,235 g of the microcapsules. The yield was 59%.

Thus, the obtained microcapsules physico-chemical method for the deposition nerastvorim using butanol and ethanol as precipitators, which increases output. The process is simple to perform and lasts for 15 minutes, requires no special equipment.

The proposed method is suitable for the agricultural industry due to ease of implementation and adaptability.

The method of producing microcapsules of pesticides by precipitation with aristotelem, wherein upon receipt of the microcapsules physico-chemical method for the deposition nerastvorim as precipitators are used butanol and ethanol, and as the shell of the microcapsules is sodium carboxymethyl cellulose, the process of obtaining is performed without special equipment.



 

Same patents:

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to microencapsulation of drugs through the example of rivanol which can be used as an antimicrobial, antifungal topical preparation. A method for preparing microcaplues of rivanol in a water-soluble polymer representing polyvinyl alcohol or polyvinyl pyrrolidone is implemented by physical-chemical precipitation with a solvent wherein a precipitant is acetone. The process is carried out at 25°C with no special equipment required.

EFFECT: method for preparing the microcapsules of rivanol provides simplifying the process of microencapsulation.

13 dwg, 5 ex

FIELD: nanotechnology.

SUBSTANCE: device (50) for preparation of nanoparticles on a continuous basis comprises the first feeding device (1a) with the first feeding load (9) connected to the source (7) of the starting material, the first reactor (2) comprising the first heated reaction zone (13), the second reactor (3) comprising the second heated reaction zone (15), where all the said devices are connected to the channel of the material flow successively in the said order, at least one pressure control unit (18) mounted in the said channel of the material flow, a mixer (5) mounted in the said channel of the material flow between the first reactor (2) and the second reactor (3), the second feeding device (lb) with the second feeding pump (10) connected to the source (8) of the starting material, and the second feeding pump (10) is in liquid junction with the mixer (5), the control device (22) made with the ability to control the pressure value setting with the said pressure control unit (18) and/or the temperature value of the said heated reaction zones (13 and 15). The device is characterised in that after each heated reaction zone (13) in the channel of the material flow the appropriate cooling device (14, 16) is mounted for reducing the size of the nanoparticles in the process of their preparation, and the cooling devices (14, 16) are additionally made with the ability to cease this process of nanoparticles preparation. Also the invention relates to use of the device for preparation of nanoparticles/nanoemulsions/colloidal solutions.

EFFECT: invention enables to obtain nanoparticles which properties can be modified in the course of this process.

8 cl, 10 dwg

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to pharmaceutical microcapsulation of cephalosporins related to β-lactam antibiotics. As a microcapsule shell, the method of pharmaceutical microcapsulation of cephalosporins uses konjac gum; the microcapsules are prepared by physical-chemical technology implying the precipitation in a non-solvent using two precipitants - carbinol and diethyl ester in ratio 1:3; the method is conducted at 25°C with no special equipment.

EFFECT: invention provides simplified and accelerated preparation of the water-soluble pharmaceutical microcapsules of cephalosporins in konjac gum, loss reduction in preparing the microcapsules (higher yield-mass).

3 ex

FIELD: medicine.

SUBSTANCE: claimed invention relates to medicine and describes method of obtaining delivering particles of fragrance, containing core material and envelope, said envelope at least partially surrounds said core material and at least 75% of said delivering particles of fragrance are characterised by tensile strength from approximately 0.2 MPa to approximately 10 MPa, with particle size from approximately 1 micron to approximately 80 micron and thickness of particle walls from approximately 60 nm to approximately 250 nm; and said delivering particles of fragrance are characterised by release of fragrance from 0% to approximately 30%. In addition to creation of possibility to reduce number of agent which produces favourable impact, such particles make it possible to extend spectrum of applied agents which produce favourable impact.

EFFECT: in cases of application in compositions, for instance, detergents, or compositions for fabric care, such particles increase efficiency of delivery of agent which produces favourable impact, making it possible to use reduced amounts of agents which produce favourable impact.

11 cl, 9 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a powder coating composition obtained from aqueous dispersion containing polymer-encapsulated particles, said particles including particles encapsulated in a brittle polymer which can easily break up under ambient conditions. The invention also discloses a method of preparing an aqueous dispersion of particles encapsulated in a brittle polymer, a base which is at least partially coated with a coating deposited from said composition, a multilayer composite coating, a method of preparing a powder coating composition, a method of preparing an aqueous dispersion of particles encapsulated in a brittle polymer and a powder coating composition formed from said dispersion prepared using said method, as well as a reflecting surface which is at least partially coated with a layer which gives the colour of an uncovered coating deposited from disclosed powder coating compositions.

EFFECT: obtaining aqueous dispersion of particles encapsulated in a brittle polymer in which repeated agglomeration of particles is minimised and which enables to obtain a powder coating composition which contains multiple polymer-encapsulated particles having maximum turbidity so that the coating has absorption or reflection in the visible spectrum which is close to that of the given coating.

22 cl, 14 ex, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of minor spherical particles of active agent in sole liquid phase solution. Sole liquid phase comprises active agent, agent facilitating phase separation and first thinner. Phase separation is induced at controller rate in solution to cause separation active agent into "fluid-solid" and to form liquid and solid phases. Note here that inducing comprises solution cooling. Solid phase contains minor spherical particles of active agent. Liquid phase comprises agent facilitating phase separation and thinner. Minor spherical particles feature particle size varying from 0.01 mcm to about 200 mcm.

EFFECT: minor spherical particles of active agent in sole liquid phase solution.

77 cl, 49 dwg, 4 tbl, 36 ex

FIELD: process engineering.

SUBSTANCE: invention maybe used for efficient fire extinguishing, fast cooling of overheated structures and production of lower-flammability compounds. Microcapsules have a micro-sphere-like core containing water or water solution in gel state, main shell around said core to provide for core stable shape and composition and rule out water evaporation therefrom the core, and, additionally, comprises outer shell with lyophilic properties. Versions of proposed methods comprises producing aforesaid core via interaction of appropriate initial water solutions to be placed in microsphere and containing appropriate components of the shell with components of solutions to be precipitated and used for producing and cross-linking of gel, and producing additional lyophilic shell via interaction of components of initial solutions with appropriate components in organic medium.

EFFECT: high efficiency in fire extinguishing or fast cooling of overheated structures.

21 cl, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to use of polymer material, and specificaly to use of particulate polymer material as an active agent carrier. The polymer material is a polymer obtained from copolymerisation of pyrrole with quadratic or croconic acid or its derivative.

EFFECT: use in accordance with the invention enables to use polymer material as a composition in form of particles as an absorbent or prolonged release agent.

16 cl, 8 dwg, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a solid re-dispersible emulsion which is a direct emulsion of fabric softener encapsulated in a polysaccharide shell which is stabilised by ions of polyvalent metals selected from Ca2+, Sr2+, Ba2+, Al3+, Cu2+, Zn2+, where the shell is initially insoluble in water but becomes soluble in water through ion donation. The polysaccharide is biodegradable and is selected from a group comprising alginates and carrageenans. Similar solid re-dispersible emulsions are primarily used in agents for washing or taking care of clothes. Powdered fabric softeners are easy to store, apportion and, if necessary, combine with powdered detergents during production.

EFFECT: invention enables production of fabric softeners previously produced as liquid compositions in solid powdered form.

14 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to capsular additives for rubber, obtained in form of microcapsules with a polymer wall and a nucleus, which contains at least one additive for rubber. The capsule wall is formed by at least one component from a reactive resin and at least one component from a polyelectrolyte or ionomer component. The reactive resin is melamine formaldehyde resin and/or polyurea resin. The invention also relates to a method of preparing such microcapsules. The proposed microcapsules are used for vulcanising natural and synthetic rubber. The microcapsules are thermally and mechanically stable in conditions for preparing and processing rubber compositions in kneading machines, manglers or twin-screw extruders at temperatures ranging from 120°C to 140°C.

EFFECT: microcapsular additives are uniformly distributed in rubber mixture and prevent formation of a heterogeneous rubber/additive system.

30 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to microcapsules used in agrochemical compositions as part of any type of composition used to in agriculture, as well for microencapsulation of pharmaceutical and medical compounds, flame-retardants, phase transition materials, thermosetting materials, ink and catalysts. The microcapsules contain a material with water solubility of less than 750 mg/l at 20°C. The wall of the microcapsules is formed via interphase polymerisation of materials which form the wall: (a) aliphatic isocyanate(s), and (b) aromatic isocyanate(s), and (c) compound(s) of formula (I), acetylene carbamide derivatives

,

where R1, R3, R5, R7 independently denote methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butylene, tert-butyl; R2, R4, R6, R8 independently denote hydrogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl; R9, R10 denote hydrogen or hydroxymethyl; including oligomeric forms of compounds (I), where the number of moles of compounds (I) ranges from 2 to 10; and the microcapsules have average diameter from 0.3 to 25 mcm when using a conventional laser diffraction analyser to measure particle size with preliminary conventional dissolution in water while stirring. The invention also describes a method of producing an agrochemical composition of a typical encapsulated suspension, containing said microcapsules, and versions of using said microcapsules.

EFFECT: obtaining microcapsules with possibility of controlling the speed of release of the microencapsulated material, and improvement of the toxicological profile of the microcapsules and compositions containing said microcapsules.

12 cl, 12 ex, 13 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to reverse-phase microcapsules (RPµ) for regular release of water-soluble or dispersed compounds, preferably agricultural chemicals. The microcapsule has a polymer wall produced in situ from reaction of an oil-soluble material(s), selected from at least one of groups i) or ii), more preferably at least one of each group, and more preferably one of each group: (i) at least glycorulil resin, preferably tetra-butoxylated glycorulil resin; (ii) at least isocyanate, preferably aliphatic polyisocyanate resin; and if selected from both types, the ratio of ii) to i) is at most 20:1 and at least 1:2; and the average size of the microcapsules ranges from 0.1 mcm to 25 mcm, preferably 1-5 mcm, and 90 percentile of the size of the microcapsules is at most 100 mcm, preferably 50 mcm, when measuring dispersion in water using a laser diffraction analyser. The invention also describes a method of obtaining a dispersion of reverse-phase microcapsules (RPµ) and an agricultural chemical composition which is a dispersion obtained using said method. The invention also discloses agricultural chemical compositions containing said microcapsules, of the type of granules dispersed in water, ZC (suspension concentrate plus a capsule suspension), as well as an agricultural chemical composition consisting of a combination of an emulsion concentrate with a capsule suspension and a method of obtaining said agricultural chemical composition.

EFFECT: obtaining acceptable agricultural compositions using a reliable, simple and efficient reverse-phase microencapsulation method which enables formation of fine microcapsules with a very uniform particle size distribution and good composition characteristics overall.

20 cl, 11 ex, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture, particularly to chemical agents for insect control. The disclosed insecticide composition contains a pyrethroid insecticide, specifically alphacypermethrin or deltamethrin or lambda-cyhalothrin, microcapsuled in lipid microcapsules with weight ratio lipid/pyrethroid insecticide equal to 2-4:1, a water-soluble organic solvent in amount of 7-18%, a stabilising additive - cyperthrin, microcapsuled in lipid microcapsules together with the pyrethroid insecticide with weight ratio of stabilising additive/pyrethroid insecticide not less than 1:4 and water - up to 100%.

EFFECT: invention enables to preserve homogeneity of the composition, prevent crystallisation of pyrethroid insecticides, wide range of microcapsuled insecticides and high efficiency.

1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. The agrochemical composition contains microcapsules. The active ingredient in the capsules is selected from a group comprising chlorpyrifos, fluroxypyr, diflufenican, sulphonylurea and mixtures of diflufenican with sulphonylureas, fluroxypyr with sulphonylureas, chloropyrifos with sulphonylureas, chlorpyrifos with fluroxypyr, fluroxypyr with diflufenican, or is selected from a group comprising triazole fungicides, and mixtures with fluroxypyr and/or chlorpyrifos. In case of mixtures, at least one of the active ingredients is microencapsulated. The microcapsules have size of 1-30 mcm. The shell of the microcapsules is made from polyurea which is formed during reaction of an aromatic isocynate and mono-, di-, tri- or tetra-alkoxyalkylglycoluril, where alkoxy denotes methoxy, ethoxy or isopropoxy, and alkyl denotes methyl, ethyl or isopropyl. The agrochemical composition contains 1-45 wt % styrene acrylic polymer. The reaction of materials which form the shell takes place in aqueous phase. The agrochemical composition is used against fungi, weeds and/or insects.

EFFECT: invention increases stability of the composition.

23 cl, 2 ex, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention maybe used for efficient fire extinguishing, fast cooling of overheated structures and production of lower-flammability compounds. Microcapsules have a micro-sphere-like core containing water or water solution in gel state, main shell around said core to provide for core stable shape and composition and rule out water evaporation therefrom the core, and, additionally, comprises outer shell with lyophilic properties. Versions of proposed methods comprises producing aforesaid core via interaction of appropriate initial water solutions to be placed in microsphere and containing appropriate components of the shell with components of solutions to be precipitated and used for producing and cross-linking of gel, and producing additional lyophilic shell via interaction of components of initial solutions with appropriate components in organic medium.

EFFECT: high efficiency in fire extinguishing or fast cooling of overheated structures.

21 cl, 1 tbl, 10 ex

FIELD: agriculture.

SUBSTANCE: water dispersion for protection of plants includes nanoparticle composition of reactant for plant protection, where nanoparticles have structure of nucleus-shell with average diametre of particles from 0.05 to 2.0 mcm; reactant for plant protection is radiologically amorphous, is in nucleus with one or more polymers, which are insoluble or partially soluble in water or water solutions, or mixtures of water with dissolvent, i.e. the second virial coefficient may not be below zero; - shell consists of stabilising wrapping matrix, containing interphase or surfactant polymer colloids, or low-molecular amphiphilic compounds or their mixtures. Nanoparticles are produced by making a reactant solution to protect plants in organic dissolvent, which is not mixed with water, by dissolving of nucleus polymer in organic dissolvent, which is not mixed with water and emulsification of mixture from (a) and (b) with water solution, containing components of wrapping matrix, by means of injection of according solutions in mixing chamber. After emulsification organic dissolvent is removed. Solid nanoparticle composition is produced by drying of water dispersion. Agrochemical composition contains solid carrier treated with specified water dispersion or solid nanoparticle composition. Seed material is etched with specified water dispersion or treated with solid composition. Undesirable fungi, plants or insects are treated with specified dispersion or composition.

EFFECT: invention allows increasing composition stability.

13 cl, 4 ex

FIELD: agriculture.

SUBSTANCE: aqueous dispersion for plant protection contains a nanoparticle composition of active substances where nanoparticles have a core-shell structure with an average diametre of particles from 0.05 to 2.0 microns. Active substance is amorphous to X-rays, it is located in the nucleus with one or more polymers. The shell consists of a stabilising wrapping matrix. Upon obtaining of nanoparticles (a), a solution of active substance is obtained for plant protection in water-miscible organic solvent, (b) obtained at the stage (a) solution is mixed with a polymer of core or a core polymer solution in water-miscible organic solvent, and the polymer is insoluble, or only partially soluble in water or aqueous solutions or mixtures of water with a solvent; (c) the obtained from (b) mixture is contacted with an aqueous solution comprising components of the wrapping matrix. Solid composition is obtained by drying an aqueous dispersion. Agrochemical composition from the solid bearer is treated with dispersion or a solid composition. Processing of plants is carried out applying the said compositions.

EFFECT: higher stability of compositions.

17 cl, 3 ex

FIELD: agriculture.

SUBSTANCE: vegetating plants are processed with aqueous compositions containing fungicides and/or insecticides as active components, as well as ethylene modulators, mineral elements and auxiliaries. The processing compositions contain at least one of active components which is immobilised into biodegradable Ca-alginate gel polymer microcapsules.

EFFECT: invention allows implementing the object matter with maintaining the standard consumption of the active ingredients.

5 cl, 4 ex

FIELD: biotechnologies.

SUBSTANCE: invention relates to microbiological industry, in particular to insecticide agents used to control larvae of flies. Insecticide agent contains bacteria Bacillus thuringiensis var. israelensis immobilised into granules of alginate gel, fungi having entomopathogenic activity to larvae of flies and additives. Insecticide agent preferably contains fungi Tolypocladium cylindrosporum as fungi having entomopathogenic activity to larvae of flies, additives include nutrient substances (starch, gelatine) and substances that impart floatability to granules of insecticide agent (vegetable oils).

EFFECT: invention makes it possible to increase efficiency of fly larvae control.

5 cl, 1 dwg, 19 ex

FIELD: food industry.

SUBSTANCE: encapsulated antimicrobial material includes (i) a kernel containing an antimicrobial material and a shell (ii) out of an encapsulated material which is a hydrophobic shell with a melting temperature higher than 45°C. It is selected out of a group including animal oils and fats, completely hydrogenated vegetable or animal oils, partially hydrogenated vegetable or animal oils, unsaturated hydrogenated or completely hydrogenated fatty acids, unsaturated hydrogenated or completely hydrogenated monoglycerides and diglycerides of fatty acids, unsaturated hydrogenated or completely hydrogenated etherified monoglycerides and diglycerides of fatty acids, unsaturated partially hydrogenated or completely hydrogenated free fatty acids, other emulsifiers, animal waxes, vegetable waxes, mineral waxes, synthetic waxes, natural and synthetic resins as well as their mixtures. The hydrophobic shell is impermeable for the antimicrobial material and is selected to provide release of the antimicrobial material from the encapsulated antimicrobial material while in contact with food products and the antimicrobial material is bacteriocin selected from the lanthionine-containing bacteriocins, bacteriocins formed by Lactococcus, bacteriocins formed by Streptococcus, bacteriocins formed by Pediococcus, bacteriocins formed by Lactobacillus, bacteriocins formed by Camobacterium, bacteriocins formed by Leuconostoc, bacteriocins formed by Enterococcus and their mixtures. The composition contains the antimicrobial material and a carrier. The food product contains the product and the antibacterial material. The method is implemented by introducing the antimicrobial material into the food product.

EFFECT: invention ensures a long antimicrobial effect.

43 cl, 16 ex, 4 tbl

FIELD: biologically active substances.

SUBSTANCE: invention provides gel-like insecticidal composition, in particular to control cockroaches, which contains lipid-microencapsulated different-type insecticides with functional additives.

EFFECT: achieved high efficiency and prolonged residual effect.

3 cl, 2 tbl, 11 ex

Up!