HU212049B - Containerisation system containing gel formulation for hazardous chemical materials - Google Patents

Abstract

The present invention relates to a storage system for hazardous chemicals containing a water-dispersible or water-dispersible organic gel in a water-dispersible bag, and the gel consists of a water-soluble or water-dispersible surfactant containing dangerous substances, an ionic surfactant and optionally anionic or amphoteric surfactant. and a gelling agent having a solid particle size of less than 100 µm. The gel is a continuous system having a phi-phase difference between the controlled shear stress and the resulting deformation and has a tg (phi) of 1.5 or less. EN 212 049 B Scope of the description: 8 pages

Description

The present invention relates to storage systems containing water-dispersible organic gels. Storage systems are suitable for storing hazardous products, making them safe for handling and the environment.

Currently, most hazardous liquids are stored in metal cans or - if smaller quantities are required - in plastic containers.

Hazardous chemicals, primarily agricultural chemicals, are produced from a variety of formulations. Liquid formulations are more suitable for farmers because they are relatively easy to handle. However, there are some difficulties in handling such fluids. There is a risk of leakage or leakage if holes are formed in the container that have been used previously or if they are dropped. While impact-resistant containers may be used, in the event of an accident, for example during transportation, there is a risk of leakage or leakage due to the rapid loss of liquid that leaks into the soil, for example.

It is a white job to produce a formulation and storage system (or container) that provides protection for those who handle it, including farmers and transport workers, and is safe for the environment.

It is an object of the present invention to provide a novel formulation system containing agrochemicals which is safe for the operator and the environment.

It is a further object of the present invention to provide a novel formulation system for agrochemicals which is easily, rapidly and appropriately dissolved and / or dispersed in water.

It is an object of the present invention to provide a novel formulation system for agrochemicals which is as compacted as possible with minimum space utilization.

It is also an object of the present invention to provide a new formulation system containing hazardous chemicals, such as agrochemicals, that reduce the risk of environmental contamination.

It is known that liquid agrochemicals can be stored in soluble bags or sachets made of films. However, these films can crack and break, causing leakage of agrochemicals stored in them and causing pollution problems. In fact, there are many different kinds of defects in the film, which cause the film to weaken and thus become potential sources of leakage. Air bubbles, dust particles, foreign bodies, gel particles, or thin spots in the film or film are all potentially weak points. If a film with such a point is subjected to an army of treatment or physical shock, the film can be destroyed at that point. This is a particular problem in agriculture, where tanks may be exposed to rough and careless handling by distributors and farmers.

JP-A-55/004 336, JP-A-62/192 301 and EP-A-0 347 220 disclose commercial formulations which are contained in a water-soluble sack or bag. GB-A-2,067,407 discloses low-volume pest control compositions.

It is an object of the present invention to prevent leakage through pinhole holes when a bag containing agrochemical product is used. Such pinhole holes are rare, but a single pinhole hole in thousands of bags is enough to cause a lot of confusion because it can contaminate the entire environment of the fluid that leaks through the hole.

It is also an object of the present invention to avoid breaking the container containing the agrochemical composition. If the tank is rigid, there is the possibility of a simple rupture. If there is fluid in the bag, this possibility is slightly reduced, but the fluid passes the punches, causing the problem of "hydraulic hammer effect". It is an object of the present invention to eliminate or at least partially reduce this hydraulic hammer effect. The use of air space in the bag has been suggested to reduce the possibility of fracture, but this represents a slight reduction in storage capacity.

It is a further object of the present invention to provide a storage system for hazardous chemicals that, as far as possible, dissipates the energy of impact from outside the container.

It is a further object of the present invention to provide a shock distribution system for storing agrochemicals, such as pesticides, pesticides or plant growth regulators.

The use of gel preparations for pharmaceuticals or cosmetics was known, but there was virtually no risk of contamination or contamination of the environment when applied to these products, unlike pesticides and other agrochemicals. Further, gels for pharmaceutical and cosmetic purposes are generally water-based, so it has not been obvious to produce gels suitable for water-soluble bags or sacks, or water-soluble bags or sacks containing pesticides, or suitable for such purposes as impact distribution.

Another possibility is the use of agrochemicals in the form of wettable powders in water-soluble bags. However, not all agrochemicals can be used in the form of wettable powders, and even if these powders are wettable, the long period during which the powders will be wettable (wetting time) can cause some technical problems.

As mentioned above, environmentally safe storage systems for pesticides have been proposed, especially those containing liquid in soluble bags or sacks. However, it may happen that the bag has pinhole holes, and under these circumstances, the liquid inside it will leak out and pollute the environment.

Although thixotropic fluid may be used, the possibility of leakage through the needle tip holes during transport is maintained as transport causes movement, which results in thixotropic fluid becoming more fluid.

If the non-aqueous liquid in the known water-soluble bags has only a small (but not zero) water content, this water content, even if low, can cause the bag to freeze when frozen.

It is an object of the present invention to provide a novel formulation system for agrochemicals which dissolves rapidly in water and which is not detrimental to normal freezing.

HU 212 049 B

It is a further object of the present invention to provide a formulation system in which relatively little solvent is required for the preparation of the pesticide, which results in cost savings in both delivery and manufacture.

It is an object of the present invention to provide a novel formulation system for agrochemicals which reduces the risk of clogging of spray nozzles or filters.

The present invention provides a storage system for storing hazardous chemicals in a water-soluble or water-dispersible bag, the bag comprising a water-dispersible organic gel having a phase difference of phi between a continuous system and controlled shear stress and resulting deformation. 1.5 or less and the gel contains

5 to 95% by weight of a hazardous chemical;

optionally up to 80% by weight of organic solvent;

From 1 to 50% by weight of a water-soluble or water-dispersible surfactant consisting of a nonionic surfactant and optionally an anionic or amphoteric surfactant in a liquid mixture with the hazardous substance and optionally an organic solvent present above 70 ° C;

0.1 to 50% by weight of a gelling agent which is liquid or solid at 23 ° C and, if solid, has a particle size of less than 100 µm and is soluble in at least 10% by weight of the hazardous chemical, surfactant and in a liquid mixture of an organic solvent present;

up to 3% by weight of water and optionally 0.1 to 10% by weight of an additive, a stabilizer, antifoam and antifreeze.

The liquid mixture of surfactant, hazardous chemical, and optionally present organic solvent may be in the form of a single continuous phase or emulsion.

The anionic or amphoteric surfactant may be zwitterionic.

The gel of the present invention optionally further comprises one or more of the following components:

an organic solvent or mixture of organic solvents in which the hazardous substance is soluble in the gel (e.g., completely soluble);

a dispersant;

a secondary thickener; and / or other additives such as stabilizers, antifoams, buffers and antifreeze.

Some of the gels used according to the invention as defined above are preferred, in particular those containing the components in the following composition (% by weight):

10-90%, more preferably 25-80% hazardous;

2-15% surfactant;

2-10% gelling agent;

0.1-30%, more preferably 1-25%, of secondary hedgehogs, and

3- 50% solvent.

If the gels used according to the invention contain a dispersing agent, it is preferably present in an amount of 1 to 25% by weight, more preferably 2 to 8% by weight.

According to a particular aspect of the invention, the components of the composition are selected such that the gels have a viscosity of 600-30,000 mPas, more preferably 1,000-12,000 mPas. The viscosities are Brookfield viscosities, the viscometer being in the form of a smooth plate with 20 revolutions per minute.

The term "coherent system" means a material that is visually homogeneous, that is, having only one physical phase for its visual appearance; however, this does not preclude the possibility that small solid particles are dispersed in the system, provided that these particles are small enough not to form a visible physical phase.

It is known that a gel is generally colloidal in which the dispersed phase mixes with the continuous phase to give a viscous, gel-like substance; there is also a dispersed system which typically consists of a high molecular weight compound or aggregate of small particles in very close contact with the liquid. In the gels used according to the invention, the dangerous substance (or active ingredient) may be in dissolved or dispersed form, such as a suspension.

According to a particular aspect of the invention, the components of the compositions are selected such that the gels used according to the invention have a relative density greater than 1, preferably greater than 1.05, more preferably greater than 1.1.

In another aspect of the invention, the components of the compositions are selected such that the sponges of the inventive gels (defined later) are present in the bags of the invention to be less than 75, preferably less than 25.

Spontaneity was determined by placing a mixture of 1 mL of gel and 99 mL of water in a 150 mL glass tube, plugging it and inverting by 180 '. The number of turns needed to completely disperse the gel is spontaneity.

The term surfactant refers to an organic material which is capable of substantially reducing the surface tension of water (7.3.10 to ² N / m at 20 ° C).

Surfactants which are particularly suitable for the purposes of the invention are defined by the following assay:

adding the liquid active ingredient, if present in the gel (50 g total), and the surfactant adjuvant (5 g) at 50 ° C to a volume of water sufficient to make the mixture a volume of 100 ml; stirring the mixture until it is a homogeneous emulsion and allowing it to stand in a graduated cylinder at 50 ° C for 30 minutes; the amount of oily phase which may precipitate (and thus form a separate liquid phase) should then be less than 20 ml.

Examples of surfactants that may be used in the present invention include, but are not limited to:

non-ionic surfactants: alkanolamides, ethylene oxide with aliphatic alcohols, aliphatic esters, aliphatic

Polycondensates of amines or substituted phenols (in particular alkyl phenols or aryl phenols); block polymers with ethoxy and propoxy groups; esters of aliphatic acids with polyols such as glycerol or glycol; polysaccharides; organopolysiloxanes; sorbitan derivatives; ethers or esters of sucrose or glucose;

anionic or amphoteric surfactants: salts of lignosulfonic acids, phenylsulfonic acids and naphthalenesulfonic acids, diphenylsulfonates; alkylaryl sulfonates, sulfonated aliphatic alcohols, amines or amides; polycondensates of ethylene oxide with aliphatic acids and their sulfate or sulfonate derivatives; salts of esters of sulphobuccinic acid or sulphosuccinamide; taurine derivatives (especially alkyl taurates); betaines useful herein; phosphoric acid esters of alcohols or phosphoric esters of polycondensates of ethylene oxide and phenols; and sulfate, sulfonate and phosphate functional derivatives of the above compounds.

The term "gelling agent" refers to a substance which is equivalent to the active ingredient by mixing (and optionally crushing) with an organic solvent in which the active ingredient is soluble at 50/50 by weight at 25 ° C. . According to the present invention, the gel is essentially a material having a phi phase difference between the controlled skew voltage and the resulting deformation such that tg (phi) is 1.5 or less, preferably 1.2 or less. Tg (phi) is the tangent to the angle (or phase difference) phi. The measurement of phi is carried out with a rheometer having a flat fixed plate and a cone hanging above the plate such that the angle between them is less than 10 ', preferably 4'. The cone is rotated by a variable speed motor; rotation is sinusoidal, that is, torque and angular motion as a sine function change with time. This angular displacement corresponds to the above deformation; the torque of the variable speed motor (which causes the angular displacement) corresponds to the aforementioned controlled shear voltage.

Gel-forming agents useful for the purposes of the present invention include tetramethyl decindiol, ethoxylated dialkyl phenols, methylated clay, propylene carbonate, hydrogenated castor oil, ethoxylated vegetable oils, diatomaceous earth, a mixture of dioctylsulfosuccinate and sodium benzoate and hexane.

If the gelling agent is preferably solid, the particle size is preferably less than 40 µm, more preferably less than 10 µm.

The term "hazardous substance" as used herein refers to a product which may be harmful to the environment or to persons working with it.

According to a major and preferred embodiment of the invention, the hazardous substance is an active ingredient which is an agrochemical, more particularly a pesticide or a pesticide (including plant growth regulators or plant nutrients).

The invention is not limited to certain specific agrochemicals, but many agrochemicals can be used according to the invention, such as:

fungicides such as triadimefon, tebuconazole, prochloraz, triforin, tridemorph, propiconazole; pirimicarb, iprodione, metalaxyl, bitertanol, iprobenphos, fluzilazole, fosetyl, propizamide, chlorothalonil, diclone, mancozeb, anthraquinone, maneb, vinclozoline, fenarimol, bendiocarb, captafol, benalaxyl and thiram;

herbicides (or defoliants) such as kizalofop and its derivatives, acetochlor, metolachlor, imazapur and imazapyr, glyphosate and glyphosate, butachlor, acifluorfen, oxifluorophen, butralin, fluazifop-butyl, bifenox, bromoxynifl, diphenoxyl, mecopropo, MCPA, MCPB, MCPP, linuron, isoproturon, flamprop and its derivatives, ethofumesate, diacylate, carbetamide, alachlor, methylsulfuron, chlorosulfuron, chlorpyralid, 2,4-D, tribufos, triclopyr, diclofopmethyl, methoxymethyl, in chloram, amitrol, azulam, dicamba, bentazone, atrazine, cyanazine, thiobencarb, promethrin, 2- (2-chlorobenzyl) 4,4-dimethyl-1,2-oxazolidin-3-one, flumeturon, napropamide, paraquate, bentazol , molinate, propachlor, imazaquin, metribuzin, tebutiuron and orizaline;

insecticides and nematode killers such as ebufos, carbosulfan, amitraz, vamidothion, ethion, triazophos, propoxur, phosalonk, permethrin, cypermethrin, parathion, methyl parathion, diazinon, methomyl, malathion, lindane, fenvalerate, etoprophos, endrin, endosulfan, dimeto , dicrotophos, dichlorprop, dichlorvos, azinphos and derivatives thereof, aldrin, cyfluthrin, deltamethrin, disulfoton, chlorodimeform, chlorpyrifos, carbaryl, dicofol, thiodicarb, propargite, demeton and fosalon;

plant growth regulators such as gibberellic acid, ether or ethephon, cycocel, chlorme, ethephon and mepic.

To determine whether a surfactant additive has dispersing properties and can be a dispersant of the present invention, perform the following test:

100 ml of an aqueous suspension containing kaolin and atrazine (50 g) in the form of solid granules having a particle size of 1-10 μπι and 5 g of surfactant are allowed to stand in a graduated cylinder at 20 ° C for 30 minutes (kaolin is used when dispersant is hydrophilic solid and atrazine are used when the dispersant is capable of dispersing a hydrophobic solid). After standing, 9/10 of the volume of the suspension at the top of the suspension is removed without mixing and the solids content of the remaining 1/10 (after evaporation of water) is measured. The solid must not be more than 12% by weight of the solids content of the 100 ml suspension to be tested.

Dispersants for use in the present invention include, but are not limited to, salts of lignosulfonic acids such as calcium lignosulfonate, phenylsulfonic acids or naphthalenesulfonic acids, polycondensates of condensed naphthalenesulfonic acid, ethylene oxide with aliphatic alcohols, aliphatic esters or aliphatic acids, phenols (especially alkyl or aryl phenols); salts of sulfobuccinic esters such as sodium sulfosuccinate; taurine derivatives (in particular alkyl taurates); alko4

Phosphoric acid esters of polyhalo or polycondensate of polycondensates of ethylene oxide and phenols; esters of polyols and aliphatic or sulfuric or sulfonic or phosphoric acids; glyceryl esters, in particular esters with aliphatic acids such as glyceryl stearate; ethylene glycols and the like.

The secondary thickener is a compound that increases the viscosity of the gel or liquid.

Non-limiting secondary thickeners for use in the present invention include, but are not limited to: fine silica; hydroxyethyl cellulose; carboxymethyl cellulose; organically modified attapulgite or montmorillonite clay; hardened castor oil; cetyl and stearyl alcohols or esters; polyethylene glycols, glyceryl hydroxystearate; poly (vinyl alcohol); salts of sulpho-succinic esters such as dioctyl sodium sulphosuccinate; salts of benzoic acid, such as sodium benzoate; and alkyl sulfates.

The gels of the invention may be prepared or prepared by any known method. A suitable process is to mix and mix the various components of the composition, optionally by crushing or grinding and / or heating. Sometimes it is more convenient to slowly add the components of the composition and it may also be desirable to add the gelling agent to the mixture at the end.

In the storage system of the present invention, the film-forming film that forms the bags can be very different in chemical nature. Suitable substances are water-soluble (or possibly water-dispersible) substances which are insoluble in organic solvents used to dissolve or disperse the agrochemically active ingredient. Particularly suitable materials are polyethylene oxides such as polyethylene glycol; starches and modified starches; alkyl and hydroxyalkyl celluloses; Thus, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose; carboxymethyl cellulose; polyvinyl ethers such as polyvinyl vinyl ether; poly (2,4-dimethyl-6-triazolylethylene); poly (vinylsulfonic acid); polyanhydrides; low molecular weight urea formaldehyde resins; low molecular weight melamine formaldehyde resins; poly (2-hydroxyethyl methacrylate); polyacrylic acid and homologues thereof; but the film coating is preferably composed of or made of polyvinyl alcohol (PVA).

Preferred materials for forming bags containing gels are polyethylene oxide, methylcellulose or polyvinyl alcohol. When polyvinyl alcohol is used, it is preferably 40-100%, preferably 80-99% alcoholic or hydrolyzed polyvinyl acetate film.

Water-soluble films for making water-soluble bags are known. In order to make the bag, the film has to be shaped (possibly partially sealed) and then filled with gel. Gels are generally able to flow, even slowly, due to their high viscosity. Containers used for storing gels cannot be emptied easily due to the high viscosity of the gels (one of the reasons why gels have not been used in agriculture so far). Once the bag is filled, the bag should be closed, usually by heating it.

The gel formulations of the present invention are illustrated by the following examples, but are not intended to limit the scope of the invention. Percentages are by weight unless otherwise specified.

Example 1

A gel is prepared by mixing the following components at 50 ° C:

active ingredient: (2,4-dichlorophenoxy) -acetic acid isooctyl ester,

64.8% solvent: aromatic solvent with flash point 65 ° C, 24.2% surfactant: 4% non-ionic / sulfonate mixed emulsifier (Toximul 572) and 1% calcium alkylbenzene sulfonate, gelling agent: dioctylsulfobasic acid salt and mixture of benzoate, 6%.

(Toximul 572: mixture of calcium salt of dodecylbenzenesulfonate and alkylaryl phenol ethoxylene).

The blended material is shaken and stirred until all components are dissolved or dispersed.

During mixing, first dissolution and then gelling occurs. After cooling to 20 'C, the mixture is enhanced to gel formation.

The gel has a Brookfield viscosity of 3000 mPas.

The stability of the emulsion according to the test described above is good. 1100 g of gel were placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 gm thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The relative density of the gel and the bag containing the gel is 1.1.

The bag is then dropped from 1.2 meters to the ground ten times.

No bag breakage or leakage is noted.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 3 minutes. The filter, which is a 3.9-mesh (100 mesh) screen, is not clogged.

Another bag made in the same way is tested for needle stick protection. The bag is filtered through a 0.6 mm needle. A small drop appears at the point where the needle has penetrated, but this drop is small enough not to drop off or flow through the bag.

Example 2

The procedure of Example 1 was followed except that a mixture containing the following additives was used:

surfactant: non-ionic / sulfonate mixed emulsifier (Toximul 572) 5.2%, gelling agent: tetramethyl decindiol, 30%.

The gel has a Brookfield viscosity of 3000 mPa.s.

The emulsion has good stability according to the above test.

1100 g of the above gel was placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 μπι thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The relative density of the gel and the bag containing the gel is 1.1.

The bag is then dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

HU 212 049 B

Place the bag in a container filled with water and mix gently (circulated by pump). The material disperses within 3 minutes. The filter, which is a 3.9-mesh (100 mesh) screen, is not clogged.

Example 3

The procedure of Example 1 was followed except that a mixture containing the following additives was used:

surfactant: nonionic / sulfonate mixed emulsifier (Toximul 572) 21.5% and calcium alkyl benzosulfonate 3.7%, gelling agent: ethoxylated dialkyl phenol 10%.

The gel has a Brookfield viscosity of 3000 mPa.s.

The emulsion has good stability according to the above test.

1100 g of this gel was placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 gm thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The density of the gel and the bag containing the gel is 1.1.

Then the bag is dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

The bag is placed in a container containing water and stirred gently (circulated by pump). The material disperses within 3 minutes. The filter which

3.9 mesh (100 mesh) sieve, not clogged.

Example 4

The gel is prepared by mixing the following components at 50 ° C:

Active substance: Bromoxyniloctanoate, 18.65%, Bromoxynilheptanoate, 13.85%, (2-Methyl-4-chlorophenoxy) -acetic acid isoctyl ester, 37.4%, Solvent:

Flash point aromatic solvent, 11.1%, surfactant: non-ionic / sulfonate mixed emulsifier (Toximul 572), 13%, gelling agent: hydrogenated castor oil, 3%, ethoxylated vegetable oil, 3%.

The above materials are mixed under shear with an attritor mixer. The product gels within minutes.

The gel has a Brookfield viscosity of 3150 mPa.s.

The emulsion has good stability according to the above test.

Gel spontaneity.

1100 g of gel were placed in a 1 liter bag made of polyvinyl alcohol film (80% hydrolyzed polyvinyl acetate, soluble in cold water, 55 gm thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The relative density of the gel and the bag containing the gel is 1.1.

Then the bag is dropped ten times from a height of 1.2 meters to the ground. No breakage or leakage is detected.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 10 minutes. The filter, which is a 20 mesh / 50 mesh screen, has no clogging.

Example 5

The procedure of Example 4 was followed except that a mixture containing the following components was used:

active ingredient: Bromoxynyl octanoate, 18.4%, Bromoxynyl heptanoate, 14.0%, (2-Methyl-4-chlorophenoxy) -acetic acid isooctyl ester, 36.6%, Surfactant mixture: Nonionic / sulfonate mixed emulsifier (Toximul 572), 9.0%, gelling agent: diatomaceous earth, 17.0%, and a 75:25 mixture of sodium sulfoborous succinic acid and sodium benzoate, 2.0%, naphthalene formaldehyde dispersant sodium sulfonate of condensate, 3.0%.

The above materials are mixed under shear with an attritor mixer. Initially, the products will be a smooth paste, which will become a gel within minutes.

The gel has a Brookfield viscosity of 9000 mPas.

The emulsion stability according to the above test is good.

Spontaneity of the gel.

1100 g of gel were placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 gm thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The relative density of the gel and the bag containing the gel is 1.1.

Then the bag is dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 10 minutes. The filter, which is a 20 mesh / 50 mesh screen, is not clogged.

Example 6

Example 5 was repeated except that a mixture containing the following components was used:

Active ingredient: Bromoxyniloctanoate, 27.7% Bromoxynyl heptanoate, 27.7% Ί atrazine, 44.6% in a mixture J 69% Solvent: 23.25% from Example 1, Gel-forming agent: Dioctyl sodium sulfosuccinate and a 75:25 by weight mixture of sodium benzoate, 1.5%.

stabilizer: alkyl sulfate, 2.15%.

surfactants: ethoxylated / propoxylated block copolymer with alkyl phenol, 3.6%, alkylaryl sulfonate of an amine, 5%, antifreeze: polyethylene glycol, 1%, antifoam: polyorganosiloxane, 0.5%.

The above materials are mixed and transferred to a ball mill. After about 5 hours, the products will become more viscous.

The gel had a Brookfield viscosity of 9100 mPa.s and then stirred for 4 minutes at 5200.

The emulsion has good stability according to the above test.

Spontaneity 11.

1100 g gel of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate), soluble in cold water6

EN 212 049 B in a 1 liter bag made of 75 μιη). The bag, which is almost full (about 95% by volume), is heat sealed. The gel and the bag containing the gel have a relative density of 1.2.

The bag is then dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 5 minutes. The filter, which has a mesh size of 3.9 holes / mm (100 mesh), has no clogging.

Example 7

The procedure of Example 6 was followed, except that a mixture containing the following components was used:

active ingredient: bromoxyniloctanoate, 33.7%, iso-octyl ester of (2-methyl-4-chlorophenoxy) acetic acid,

36.2%, solvent. 65 ° C flash point aromatic solvent, 3.0%, surfactant: non-ionic / sulfonate mixed emulsifier (Toximul 572), 8.5%, and calcium dodecylbenzene sulfonate, 1.0%, gelling agent: tetramethyl decindiol, 17 , 6%.

The above materials are mixed by shearing with an attritor mixer. Initially, the product is a uniform paste which becomes a gel within a few minutes.

The gel has a Brookfield viscosity of 2200 mPas.

The emulsion stability according to the above test is good.

Spontaneity of the gel.

1100 g of gel were placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 μιη thick). The bag, which is almost full (about 95% by volume), is sealed with heat. The relative density of the gel and the bag containing the gel is 1.1.

Then the bag is dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

Place the bag in a container filled with water and mix gently (circulated by pump). The material disperses within 5 minutes. The filter, which has a mesh size of 3.9 holes / mm (100 mesh), has no clogging.

Example 8

The procedure described in Example 7 was followed except that a mixture containing the following components was used:

the active ingredient is the same as in Example 7 and the amount is the same, but the solvent is the same but 10.6%, surfactant mixture: ethoxylated polyarylphenol 6% and calcium dodecylbenzene sulfonate 2% gelling agent: hexanediol and hexindiol 1 : 1: 1 by weight 11.5%.

The above materials are mixed at 90 ° C while being subjected to shear with an attritor mixer. The product will initially be a smooth paste which will become a gel within a few minutes.

The gel has a Brookfield viscosity of 2500 mPa.s.

The emulsion has good stability according to the above test.

The gel has a spontaneity of 5%.

1100 g of gel is placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, 55 μιη thick). The bag, which is almost full (up to about 95% by volume), is heat sealed. The relative density of the gel and the bag containing the gel is 1.1.

Then the bag is dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 5 minutes. The filter which

3.9 mesh (100 mesh) sieve, not clogged.

Example 9

The procedure of Example 4 was followed except that a mixture containing the following components was used:

Active ingredient: Bromoxyniloctanoate 36.125% Bromoxynil heptanoate 36.125% Solvent: Flash point aromatic solvent 65 ° C 17.5% Surfactant:

non-ionic / sulfonate mixed emulsifier 4.5% and calcium calcium dodecylbenzene sulfonate 1.0% gelling agent: 75:25 mixture of dioctyl sodium sulfoborous acid and sodium benzoate 4.25% antifoam: tetramethyl decindiol 0, 5%.

The above materials are mixed at 50 'C and subjected to shear with an attritor mixer. Initially, the product is a uniform paste which becomes a gel within a few minutes.

The gel has a Brookfield viscosity of 4850 mPa.s.

The emulsion stability according to the above test is good.

Spontaneity of its branches 10.

1100 g of gel were placed in a 1 liter bag made of polyvinyl alcohol film (88% hydrolyzed polyvinyl acetate, soluble in cold water, thickness 55 μπι). The bag, which is almost full (about 95% by volume), is heat-sealed. The relative density of the gel and the bag containing the gel is 1.1.

The bag is then dropped from 1.2 meters to the ground ten times. No breakage or leakage is detected.

The bag is placed in a container of water and stirred gently (circulated by pump). The material disperses within 3 minutes. The filter which

3.9 mesh (100 mesh) sieve, not clogged.

Claims (22)

PATENT CLAIMS 1. A storage system for storing hazardous chemicals in a water-soluble or water-dispersible bag, characterized in that the bag comprises a water-dispersible organic gel having a phi phase difference between a continuous system and a controlled shear stress and the resulting deformation. phi) is 1.5 or less and the gel contains HU 212 049 B 5 to 95% by weight of a hazardous chemical; optionally up to 80% by weight of organic solvent; From 1 to 50% by weight of a water-soluble or water-dispersible surfactant consisting of a nonionic surfactant and optionally an anionic or amphoteric surfactant in a liquid mixture with the hazardous substance and the optional organic solvent present above 70 ° C; 0.1 to 50% by weight of a gelling agent which is liquid or solid at 23 ° C and, if solid, has a particle size of less than 100 µm and is soluble in at least 10% by weight of the hazardous chemical, surfactant and optionally in a liquid mixture of an organic solvent present; up to 3% by weight of water and optionally 0.110% by weight of an additive selected from the group consisting of dispersants, stabilizers, antifoams and anti-freeze. Storage system according to claim 1, characterized in that the hazardous chemical is an agricultural chemical. Storage system according to claim 1 or 3, characterized in that the hazardous chemical is a plant protection product, a plant growth regulator, a pesticide or a plant nutrition. 4. Storage system according to any one of claims 1 to 4, characterized in that the water-soluble or water-dispersible surfactant forms a liquid mixture with the hazardous chemical and the optional organic solvent above 50 ° C. 5. Storage system according to any one of claims 1 to 3, characterized in that the gelling agent is a liquid or a solid having a particle size of less than 20 gm. 6. Storage system according to any one of claims 1 to 3, characterized in that the water content of the gel is less than 1% by weight. 7. Storage system according to any one of claims 1 to 3, characterized in that the gel further comprises one or more of the following components: an organic solvent or mixture of organic solvents in which the hazardous chemical is dissolved at a concentration in the gel; dispersant; a secondary thickener or stabilizer, antifoam, buffer or antifreeze. 8. Storage system according to any one of claims 1 to 3, characterized in that the gel 25-80% by weight of hazardous chemical; 2 to 15% by weight of a surfactant; 2 to 10% by weight of a gelling agent, and 3 to 50% by weight of solvent. 9. Storage system according to any one of claims 1 to 3, characterized in that the gel From 1 to 25% by weight of a dispersant; 0.1-30% by weight of a secondary thickener and 0-20% by weight, containing the additive as claimed in claim 7. 10. The storage system of claim 9, wherein the gel is 2-8% by weight of a dispersant; 1-25% by weight of a secondary thickener and 0.1 to 10% by weight, containing the additive of claim 7. 11. Storage system according to any one of claims 1 to 3, characterized in that the gel has a viscosity of 600-30 000 mPas. Storage system according to claim 11, characterized in that the gel has a viscosity of 1000-12000 mPa.s. 13. Storage system according to any one of claims 1 to 3, characterized in that the specific gravity of the gel is greater than 1. 14. A storage system according to claim 13, wherein the gel has a specific gravity greater than 1.05. 15. Storage system according to any one of claims 1 to 3, characterized in that the phase difference of the gel phi between the controlled shear stress and the resulting deformation is tg (phi) of 1.2 or less. 16. Storage system according to any one of claims 1 to 3, characterized in that the gel has a spontaneity of less than 75. 17. A storage system according to claim 16, wherein the gel has a spontaneity of less than 25. 18. Storage system according to any one of claims 1 to 3, characterized in that the bag is made of poly (ethylene oxide), starch or modified starch, alkyl or hydroxyalkyl cellulose, carboxyalkyl cellulose, polyvinyl ether, poly (2, It consists of 4-dimethyl-6-triazolyl ethylene), polyvinylsulfonic acid, polyanhydride, urea-formaldehyde resin, melamine-formaldehyde resin, polyacrylate, polymethacrylate or polyacrylic acid or a homologue thereof. 19. A storage system according to claim 18, wherein the bag is a polyethylene oxide, a polyethylene glycol, a hydroxyalkyl cellulose, a hydroxymethyl, a hydroxyethyl or a hydroxyethyl cellulose. propyl cellulose, carboxyalkyl cellulose carboxymethyl cellulose, polyvinyl ether polyvinylmethyl vinyl ether, or polymethacrylate poly (2-hydroxyethyl methacrylate). 20. Figures 1-19. Storage system according to any one of claims 1 to 3, characterized in that the bag consists of polyethylene oxide, methylcellulose or polyvinyl alcohol. The storage system of claim 20, wherein the bag is polyvinyl alcohol derived from 40% to 100% alcohol or hydrolyzed polyvinyl acetate. 22. The storage system of claim 21, wherein said bag is a polyvinyl alcohol derived from 80% to 99% alcoholic or hydrolyzed polyvinyl acetate.