WO1996027288A1 - Compositions agrochimiques enrobees contenant du bicarbonate - Google Patents

Compositions agrochimiques enrobees contenant du bicarbonate Download PDF

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Publication number
WO1996027288A1
WO1996027288A1 PCT/US1996/001529 US9601529W WO9627288A1 WO 1996027288 A1 WO1996027288 A1 WO 1996027288A1 US 9601529 W US9601529 W US 9601529W WO 9627288 A1 WO9627288 A1 WO 9627288A1
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WIPO (PCT)
Prior art keywords
composition
accordance
ingredient
inorganic salt
particles
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PCT/US1996/001529
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English (en)
Inventor
M. Stephen Lajoie
Amy Joseph
Keith A. Jones
Anthony E. Winston
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Church & Dwight Company, Inc.
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Priority to AU47758/96A priority Critical patent/AU4775896A/en
Publication of WO1996027288A1 publication Critical patent/WO1996027288A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/04—Carbon disulfide; Carbon monoxide; Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings
    • C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer

Definitions

  • phytopathogenic fungi The control of phytopathogenic fungi is of great economic importance since fungal growth on plants or on parts of plants inhibits production of foliage, fruit or seed, and the overall quality of a cultivated crop.
  • weed control is essential in the cultivation of important agricultural crops such as corn, peanuts and cotton, and in the cultivation of many horticultural species. Also, the presence of weeds on non-cropped areas can be a fire hazard, or can result in undesirable drifting of sand or snow, or can cause discomfort to persons with allergies. Control of weeds is particularly beneficial when it permits the selective control of such plants without concurrent injury to desirable crops or vegetation.
  • Chemical herbicides are classified according to the type of activity they possess. A given compound may have more than one type of activity depending upon its mode of application and the rate at which it is applied. In addition, herbicides are usually classified as selective or non-selective pre-emergents or post-emergents.
  • the most effective pre-eraergence herbicide is one which is selective in its nature. If the designated compound can kill the seed and germinated seedlings of undesirable plants without harm to the seed and germinated seedlings of the crop, there will not be any problem of overpenetration of the soil by the herbicide.
  • Post-emergence herbicides are applied after the crop and weeds have attained substantial height. In general, if a compound is found to have post-emergence activity it will not be selective.
  • Herbicides are effective through contact, and others are taken up from the soil by root systems.
  • Herbicide types include defoliants, desiccants, eradicants, systemics and selective herbicides, and related plant growth regulants.
  • defoliants desiccants
  • eradicants systemics
  • selective herbicides and related plant growth regulants.
  • insecticide developments a wide variety of ornamental and agricultural plants are susceptible to infestation by insects and arachnids. The pests inflict damage by consuming foliage and roots, withdrawing juices from the plants, secreting toxins, and infecting with diseases.
  • Field crops which require protection from pests include such valuable crops as soybeans, corn, peanuts, cotton, alfalfa and tobacco.
  • vegetables such as tomatoes, potatoes, sugar-beets, carrots, and the like, and nuts, ornamentals, apples, peaches, peas, citrus fruit and grape also require protection from the ravages of such pests.
  • Insects which are difficult to control include those which inhabit the soil and cause destruction of the root systems of valuable agricultural crops.
  • Corn rootworms are the larvae of several beetle species of the genus Diabrotica. The adult beetles lay their eggs in the soil of a maturing corn crop. The eggs lay dormant in the soil until the following spring, then they hatch in response to favorable soil temperatures and the larvae feed on the roots of young corn plants causing reduction in yield.
  • insecticide compounds have been developed to combat insects which are harmful to agricultural and horticultural plants.
  • Illustrative of insecticide compositions are those described in United States Patent Numbers 3,217,037; 3,506,698; 3,576,834; 3,636,111; 3,755,364; 3,875,232; 4,028,413; 4,128,581; 4,415,743; 4,640,927; 4,804,653; 4,839,349; 5,010,068;
  • pesticide compositions which contain one or more inorganic bicarbonate or carbonate compounds. It is known that bicarbonate and carbonate compounds exhibit biocidal properties for agricultural purposes. Phytopathology, L, 169 (1931) by R. H. Marloth describes studies involving the physiology of fungi. The reference reports studies which demonstrate that sodium and potassium bicarbonate and carbonate salts are toxic to fungi such as Penicillum italicum and Penicilium di ⁇ italum.
  • Japanese patent 56043207 describes a biocidal composition containing sodium bicarbonate and a polyglycerol fatty acid ester. The biocide controls Penicillum di ⁇ itatum on oranges, Sphaerotheca fuli ⁇ enea on cucumbers, Piricularia oryzae on rice, and mosaic virus on tomatoes.
  • Japanese patent 57062208 describes horticultural fungicides in which the addition of sodium bicarbonate to polyoxin or thiophanatemethyl increases the fungicidal activity of the organic biocide against botrytis cinerea on cucumbers.
  • an object of this invention to provide an agricultural composition which is a combination of inorganic and organic compounds exhibiting agrochemical properties.
  • a slow-release powder composition composed of encapsulated particles which are a combination of ingredients comprising (1) a particulate inorganic salt ingredient selected from the group consisting of alkali metal and ammonium bicarbonates; and (2) a blend ingredient comprising (a) an agrochemical compound, and (b) a water-soluble or water-dispersible hydrophilic organic polymer; wherein the blend ingredient is in the form of a continuous film coating on the surface of the inorganic salt particles, and the blend ingredient coating functions as a slow-release medium in the presence of moisture.
  • this invention provides an agrochemical formulation which is a dry blend of at least two slow-release powder compositions of the type defined hereinabove.
  • this invention provides an aqueous agrochemical formulation which contains a dispersed phase of a slow-release powder composition of the type defined hereinabove, and as illustrated in the Examples.
  • the inorganic salt ingredient crystallites can have an average particle size in the range between about 1-18 microns in a powder composition which is adapted for utility as a pesticide dusting powder.
  • the particulate inorganic salt ingredient crystallites can have an average particles size between about 200-800 microns, before being encapsulated with a continuous film coating of the blend ingredient on the surface of the particles.
  • the coating on the inorganic salt particles can be a single layer or multiple layers, and typically will comprise between about
  • the coating thickness typically will vary in the range between about 0.1-30 microns.
  • the content of the agrochemical compound or mixture of agrochemical compounds in the blend ingredient coating on the inorganic salt particles can very between about 0.5-35 weight percent, based on the coating weight.
  • average particle size refers to the average of the largest dimension of particles.
  • water-soluble refers to a hydrophilic polymer which has a water-solubility of at least about one gram per 100 grams of water at 25°C.
  • water-dispersible refers to a hydrophilic polymer which has a water-solubility of less than about one gram per 100 grams of water at 25 ⁇ C, and which forms a stable phase when dispersed in an aqueous medium.
  • the inorganic salt ingredient is selected from compounds which include sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate.
  • the inorganic salt ingredient can include between about 0.5-20 weight percent of an additional compound selected from sodium carbonate, potassium carbonate, lithium carbonate and ammonium carbonate, based on the weight of inorganic salt ingredient.
  • Illustrative of inorganic salt ingredients in a formulation are sodium, potassium, lithium or ammonium bicarbonate; or mixtures such as sodium bicarbonate and potassium bicarbonate; sodium bicarbonate and ammonium bicarbonate; potassium bicarbonate and ammonium bicarbonate; sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate; sodium bicarbonate and potassium carbonate; potassium bicarbonate and sodium carbonate; and the like.
  • inorganic salt compounds can be utilized in a broad range of molar quantities relative to each other.
  • the molar quantity of a carbonate salt compound normally is determined by pH control considerations when aqueous formulations are prepared.
  • the content of a carbonate salt compound can be varied to control the pH at a desired level in the range of 7.5-12.
  • Aqueous pesticidal formulations of the present invention tend to have a higher biocidal activity at higher pH values.
  • the agrochemical constituent of the particle coating can consist of one or more biologically active organic compounds. Biologically active organic compounds are illustrated by fungicides, herbicides, insecticides, plant growth regulators, fertilizers, and the like.
  • An agrochemical fungicide ingredient can be selected from a wide variety of organic compounds or mixtures which are known and used in agriculture and horticulture applications, such as those listed in Agricultural Chemicals, Book IV, Fungicides, 1989 Revision (W. T. Thomson, Thomson Publications, Fresno, California 93791) .
  • the general categories of fungicidal- active compounds include anilides, dithiocarbamates, halogenated derivatives, heterocyclic nitrogen derivatives, organometallic derivatives, and the like.
  • fungicidal compounds are carbendazim, benomyl, thiophanate-methyl, thiabendazole, fuberidazole, dichlofluanid, cymoxanil, oxadixyl, metalaxyl, furalaxyl, benalaxyl, fenarimol, iprodione, procymidone, vinclozolin, penconazole, myclobutanil, pyrazophos, ethirimol, ditalimfos, tridermorph, triforine, nuarimol, triazbutyl, guazatine, propiconazole, prochloraz, flutriafol, chlortriafol, triadimefon, triadimenol, dichlobutrazol, fenpropi orph, fenpropidin, chlorozolinate, fenfuram, carboxin, oxycarboxin, meth
  • An agrochemical herbicide ingredient can be selected from a wide variety of inorganic and organic chemical structures known and used in pest control applications.
  • Amide herbicides are exemplified by commercial products such as Lasso and Dual, which are effective for pre-emergent or pre-planting applications.
  • Arsenical herbicides include cacodylic acid and the salts of monomethylarsinic acid and dimethylarsinic acid. Cacodylic acid is a defoliating or desiccating contact herbicide.
  • Arsinic acid salts have lower contact toxicity and act through absorption.
  • the salt form is preferred rather than the free acid form.
  • Carbamate and thiocarbamate herbicides include Belanal, Betanex, Sutan, Eptam, and similar trademark products. These herbicides usually are applied to the soil and are taken up through the root systems.
  • Carboxylic acid herbicides are illustrated by commercial products such as Banvel, Ga Ion and 2,4-D. Various of these herbicides can be applied to the soil or to foliage, and are effective against broad leaf weeds.
  • Dinitroaniline herbicides include Balan and Treflan commercial products, which are applied to the soil to inhibit root growth and shoot growth, and exhibit low translocation.
  • Heterocyclic nitrogen-containing herbicides are illustrated by Aatrex, Basagran, Sencor and Velpar, which are applied to the soil for pre-emergent control.
  • Organophosphate compounds are useful as plant growth regulators and herbicides. This type of organic biocide structure is illustrated by Bensulide and Betasan.
  • Urea herbicides are nonselective and usually are soil applied.
  • Urea-type commercial products include Lorox and Tupersan.
  • Quaternary herbicides include commercial products such as Avenge, Diquat and Paraquat, which have utility as contact foliars.
  • Other commercially available herbicides include Atrazine, Bentazon, Bromacil, Casoron, Chloroamben, Delapon, Diuron, Fluometuron, Glphosate, Linuron, Picloram, Trifluralin, and the like.
  • the types of weeds which are controlled by herbicide agrochemicals include barnyard grass, green foxtail, wild oats, nightshade, velvetleaf, annual morningglory, yellow nutsedge, pigweed, downy brome, and the like.
  • An agrochemical insecticide ingredient can be selected from a wide variety of organic chemical structures, such as those listed in Agricultural Chemicals, Book I, Insecticides, 1989 Revision (W. T. Thomson, Thomson Publications, Fresno, California 93791) .
  • insecticidal- active organic compounds include chlorinated hydrocarbon derivatives, phosphorated derivatives, pyrethroids, acylureas, and the like.
  • the chlorinated hydrocarbon insecticides usually act as stomach and contact poisons affecting the nervous system. They are persistent in the environment and tend to accumulate in animal fatty tissue, as exemplified by DDT and chlordane.
  • the organic phosphates generally are contact and/or stomach poisons. They are less persistent in the environment than the chlorinated hydrocarbons. They are toxic since they generally are cholinesterase inhibitors, which interfere with nerve impulse transmission. Most of these compounds are characterized by relatively low LD 50 values, although the value for malathion is 1400. Parathion is one of the best known organic phosphate systemic insecticides, and is considered a dangerous material to handle.
  • the carbamates are similar in action to the organic phosphate insecticides. These insecticides usually are not magnified in the food chain, and are characterized by rapid breakdown.
  • the synthetic pyrethroids react well with synergists and exhibit relatively low mammalian toxicity. Generally they break down rapidly and leave little residue.
  • insecticidal compounds are chlorfluazuron, chlorpyrifos, chlorpyrifos methyl, bromophos, diazinon, malathion, trichlorfon, dimethoate, phorate, lindane, toxaphene, diflubenuron, methomyl, propoxur, carbaryl, cyhexatin, cypermethrin, permethrin, fenvalerate, dicofol, tetradifon, propargite, and the like.
  • An agrochemical plant growth regulator ingredient can be selected from the types of organic chemical structures which are known to exhibit phytohormone activity, such as 3-indolealkanoic acids, deterpenoid acids, cytokinins, chloro- substituted phenoxyacetic acids, naphthaleneacetic acids, and the like.
  • An invention plant growth regulating composition preferably has a content of an organic plant growth stimulant ingredient such as a surfactant.
  • Plant growth regulator compounds include abscisic acid, gibberellic acid, 3-indoleacetic acid, 2,4-dichlorophenoxyacetic acid, 2-naphthylacetic acid, 2,3,5-triiodobenzoic acid, phenyl indole-3-thiolobutyrate, kinetin, zeatin, 6-benzylaminopurine, and the like.
  • An agrochemical fertilizer ingredient can be selected from nitrogen-containing and phosphorus- containing organic compounds such as urea, melamine, hexamine, benzoquanamine, dicyanodiamide, ammeline, cyanuric acid, melamine nitrate, triethyl phosphite, and the like.
  • An inorganic agrochemical compound normally is insoluble in the hydrophilic polymer of the coating blend ingredient. It will be present in the particle coating film as a dispersed crystalline particle phase.
  • An organic agrochemical compound normally is soluble in the hydrophilic polymer of the coating blend ingredient. It will be present in the particle coating film as a dissolved solute in a solid solution.
  • the application of the blend ingredient coating to the inorganic salt crystallite surfaces is accomplished by conventional means such as pan coating, spray-drying, fluidized coating, centrifugal fluidized coating, and the like.
  • the blend ingredient usually is dissolved in a suitable solvent such as water, methanol, ethanol, acetone, tetahydrofuran, ethyl acetate, dimethylformamide, and the like, as appropriate for a selected polymer species.
  • a coating also can be applied to inorganic salt crystallites in the form of an emulsion or suspension. After the coating medium is applied to the crystallites, the solvent medium is removed by evaporation, thereby forming a continuous film coating which encapsulates the discrete fine grain crystallites.
  • bicarbonate powder is dispersed in a solvent medium which contains coating polymer and agrochemical ingredients.
  • the dispersion is atomized and sprayed into heated air to remove the solvent phase, and to provide a free-flowing polymer-encapsulated bicarbonate powder product.
  • a hydrophilic polymer employed for coating the inorganic salt crystallites is selected from water-soluble and water-dispersible organic polymers.
  • a mixture of polymers can be employed, and a content of between about 0.5-40 weight percent of a water-insoluble polymer, based on the coating weight, can be included with a hydrophilic polymer.
  • Suitable hydrophilic polymers for coating inorganic salt crystallites include gum arabic, gum karaya, gum tragacanth, guar gum, locust bean gum.
  • xanthan gum carrageenan, alginate salt, casein, dextran, pectin, agar, 2-hydroxyethyl starch, 2-aminoethyl starch, maltodextrin, amylodextrin, 2-hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose salt, cellulose sulfate salt, polyvinylpyrrolidone, polyethylene glycol, polypropylene glycol, polyethylene oxide, polyvinyl alcohol/acetate, polyacrylamide, and the like.
  • Polyvinyl acetate is illustrative of a water- insoluble polymer which can be included as an additional coating component to moderate the hydrophilicity of a hydrophilic polymer coating.
  • Suitable water-insoluble polymers, in combination with a hydrophilic polymer, for coating inorganic salt crystallites include polyvinyl acetate, polyacrylamide, polyvinyl chloride, polystyrene, polyethylene, polyurethane, and the like.
  • the rate of release of bicarbonate salt core matrix content of the encapsulated particles under moisture conditions can be controlled by the quantity and type of polymer coating on the particle surfaces.
  • Low molecular weight hydrophilic polymers will release the particle core matrix content at a relatively fast rate in the presence of moisture.
  • High molecular weight polymers which are less 19 hydrophilic will release at a relatively slow rate. Additional rate control is obtained by employing mixtures of polymer components of varied hydrophilicity.
  • Polyethylene glycol (M.W. of 4000) or polyvinyl alcohol will release the particle core matrix content at a relatively fast rate.
  • Polyethylene oxide (M.W. of 4,000,000) or partially hydrolyzed polyvinyl acetate will release at a relatively slow rate.
  • Polyvinylpyrrolidone will release the particle core matrix content at an intermediate rate when in contact with moisture.
  • this invention provides a dry pulverulent formulation which is a blend of constituents comprising (A) a slow-release powder composition composed of encapsulated particles which are a combination of ingredients comprising (1) a particulate inorganic salt ingredient selected from the group consisting of alkali metal and ammonium bicarbonates; and (2) a blend ingredient comprising (a) an agrochemical compound, and (b) a water-soluble or water-dispersible hydrophilic organic polymer, wherein the blend ingredient is in the form of a continuous film coating on the surface of the inorganic salt particles, and the blend ingredient coating functions as a slow-release medium in the presence of moisture; and (B) a surfactant constituent.
  • the surfactant constituent is a cationic, anionic or nonionic organic compound or a mixture thereof, and the content of the surfactant is in the range between about 0.2-10 weight percent, based on the formulation weight.
  • Suitable surfactants include cetyltrimethylammonium bromide; sodium lauryl sulfate; sodium dodecylbenzenesulfonate; ammonium lignosulfonate; condensation products of ethylene oxide with fatty alcohols, amines or alkylphenols; partial esters of fatty acids and hexitol anhydrides; and the like.
  • an anti-caking or free-flow aid can be included as an additive in an invention powder composition.
  • Useful additives include mannitol, sorbitol, phosphorus pentoxide, calcium sulfate, barium oxide, calcium chloride, and the like.
  • an invention encapsulated powder composition can be in the form of dusting powders, granules or pellets, and can be utilized as such for pest control or plant growth regulation or fertilization applications.
  • An invention encapsulated powder composition also can function as a dispersible powder when it contains a surfactant ingredient which facilitates dispersion of the powder in an aqueous medium.
  • a present invention encapsulated powder composition has a unique combination of properties, and provides versatility and advantage in a broad range of agricultural and horticultural applications.
  • Each of the bicarbonate and carbonate components either singly or together in the inorganic salt ingredient exhibits fungicidal activity when an invention composition is applied in solid form or as an aqueous medium in agricultural pest control applications.
  • the physical combination of the particulate inorganic salt ingredient and the agrochemical ingredient in the particle surface coating prevents any settling or inhomogeneous separation of the ingredients in a dry powder composition.
  • the protected polymer-encompassed state of the agrochemical ingredient in the coating contributes stability to the ingredient under variable conditions of temperature and atmosphere during storage.
  • the molecular interface of inorganic salt ingredient and agrochemical ingredient under field application conditions permits an optimized enhancement of agrochemical efficacy. Less agrochemical ingredient can be utilized to achieve a prescribed degree of pest control or plant growth regulation.
  • the relative quantities of inorganic salt and agrochemical ingredients can be controlled with precision. Administration of parts per million of one or more agrochemicals can be accomplished with ease and efficiency, and phytotoxic side effects can be minimized.
  • two or more invention powder compositions can be blended to provide formulations with precise quantities of two or more agrochemicals for polyfunctional activities in agricultural applications.
  • EXAMPLE I This Example illustrates a process for the preparation of a slow-release agrochemical powder composition in accordance with the present invention.
  • KHC0 3 (325 mesh, 125 g) is suspended in the ethanol solution with stirring. The ethanol solvent is removed by evaporation under vacuum. A dry free-flowing KHC0 3 powder is obtained, in which the particles are encapsulated with a continuous film coating of Benomyl/maltodextrin on the surface of the particles.
  • Both the KHCO j and Benomyl exhibit slow- release fungicidal activity in agricultural pest control applications, when utilized in solid form, or as a suspension in an aqueous medium.
  • the fungicidal efficacy of the Benomyl is enhanced by the presence of the KHC0 3 ingredient.
  • a more pronounced synergistic effect on the Benomyl fungicide activity is obtained if an equivalent weight of a 50/50 NaHC0 3 /KHC0 3 mixture is employed in place of the KHC0 3 content.
  • EXAMPLE II This Example illustrates a fluidized bed procedure for coating particulate bicarbonate powder with an agrochemical-containing hydrophilic polymer in accordance with the present invention.
  • a fluidized bed vessel is utilized which is equipped with a Wurster air-suspension coater system (WARF) as described in U.S. 4,568,559 and U.S. 4,877,621.
  • a coating solution is prepared by dissolving polyethylene glycol (50 g, Poly-G 2000, Olin Corp.), propylene glycol butyl ether (5 g, PPG 14, Americol) , and urea (15 g) in ethanol (500 g)/water (75 g) .
  • Sodium bicarbonate powder is utilized as the core matrix type of crystallites.
  • the sodium bicarbonate (Particle Size Technology, Inc.) has an average particle size of about 5 microns, and 90 percent of the particles have a diameter less than 20 microns. The powder is charged into the coating chamber of the coated system.
  • Compressed air is introduced into the coating chamber, and the polymeric coating solution is sprayed on the air-suspended bicarbonate crystallites, until the coating weight is about 30% of the total dry weight of the coated particles.
  • Hydroxypropylmethylcellulose Metalhocel 60 HG, Dow Chemical Co.
  • maltodextrin Lidex 10; Durkee Foods
  • amylodextrin is employed as the water-soluble polymer, and 0.5 g of a surfactant is included in the solution (polyoxyethylenesorbitan monolaurate; Tween 20; ICI Americas, Inc.).
  • the procedure is repeated except that an 80/20 by weight mixture of polyvinylpyrrolidone/ polyvinyl acetate is employed as the crystallite- coating polymer ingredient.
  • the coated particles consist of a continuous polymer film coating on an inner core of a single crystallite or multiple crystallites of sodium bicarbonate.
  • EXAMPLE III This Example illustrates the effectiveness of an encapsulated slow-release pre-emergence herbicide in accordance with the present invention.
  • Example II Following the procedure of Example I, the NH 4 HC0 3 and K 2 C0 3 salts are suspended in an ethanol solution of the hexazinone and guar gum ingredients. The solvent is removed, and the resultant dry powder has a continuous film coating of hexazinone/guar gum on the surface of the inorganic salt particles.
  • the prepared powder is blended with the ethoxylated sorbitan monolaurate ingredient, and the blend is suspended in water to form an aqueous emulsion.
  • the emulsion formulation is diluted with water to 250 ppm of herbicide ingredient.
  • the diluted formulation is tested at the rate of 10 pounds per acre of herbicide ingredient, by drenching the formulation onto soil disposed in 4.5 inch plastic pots which contain respectively weed seeds of velvet leaf, jimsonweed, tall morningglory, switchgrass, barnyard grass, and green foxtail.
  • the percent control of each weed type is determined two weeks after treatment in comparison with untreated controls. The results indicate essentially 100 percent control of each weed type germination.
  • the NaHC0 3 salt is suspended in a dioxane solution of the Captan and polyethylene glycol ingredients.
  • the solvent is removed, and the resultant powder consists of inorganic salt particles encapsulated with a continuous film coating of Captan/ polyethylene glycol on the surface of the particles.
  • the coating on the particles is about 30 weight percent, based on the weight of encapsulated particles.
  • the encapsulated particles have an average particle size of about 80 microns.
  • a portion of the powder is granulated by spraying the powder with water, mixing the powder in a rotary mixer, and then drying the granulated product.
  • a second encapsulated fungicide powder composition is prepared by substituting pentachloronitrobenzene (TERRACLOR FF; Uniroyal Chemical Co.) for the Captan ingredient.

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  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • General Health & Medical Sciences (AREA)
  • Plant Pathology (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Agronomy & Crop Science (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Environmental Sciences (AREA)
  • Toxicology (AREA)
  • Inorganic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Cette invention porte sur une composition pulvérulente sèche se présentant sous la forme de particules enrobées. Ces particules sont constituées, (1), d'un sel inorganique sous forme particulaire tel que du bicarbonate de sodium, de potassium ou d'ammonium ou bien de leur mélange et, (2), d'un mélange d'un ingrédient agrochimique et d'un polymère hydrophile adhérant comme un enduit pelliculaire continu sur la surface des particules du sel inorganique. Cet ingrédient inorganique peut être un mélange de deux composés biologiquement actifs ou davantage. L'enduit pelliculaire agit comme un milieu à libération lente en présence d'humidité.
PCT/US1996/001529 1995-03-08 1996-02-13 Compositions agrochimiques enrobees contenant du bicarbonate WO1996027288A1 (fr)

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AU47758/96A AU4775896A (en) 1995-03-08 1996-02-13 Encapsulated bicarbonate-containing agrochemical compositions

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US40057295A 1995-03-08 1995-03-08
US08/400,572 1995-03-08

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1809103A2 (fr) * 2004-10-12 2007-07-25 OMS Investments, Inc. Produits nutritifs moules pour la croissance des plantes et leurs procedes de production
WO2011015305A3 (fr) * 2009-08-05 2011-04-14 Skw Stickstoffwerke Piesteritz Gmbh Agent antiagglomérant pour engrais à base d'urée, formulations d'engrais renfermant cet agent antiagglomérant, et procédé pour leur production
WO2014091279A1 (fr) * 2012-12-12 2014-06-19 Universidad De La Frontera Engrais azoté à libération contrôlée utilisant du biocharbon en tant que matrice support renouvelable
WO2015044039A1 (fr) * 2013-09-30 2015-04-02 Basf Se Compositions fongicides synergiques contenant du khc03
WO2016166010A1 (fr) * 2015-04-14 2016-10-20 Tischmacher Heinz Engrais contenant du bicarbonate d'ammonium
WO2018106544A1 (fr) * 2016-12-06 2018-06-14 Nc Brands, L.P. Agent acidifiant encapsulé hydrosoluble
US11040920B2 (en) 2017-12-15 2021-06-22 Innovations For World Nutrition Llc Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield
US11192830B2 (en) 2020-04-15 2021-12-07 Innovations for World Nutrition, LLC Seed coating to promote plant growth and method of increasing plant yield
US11358909B2 (en) 2020-04-15 2022-06-14 Innovations for World Nutrition, LLC Fertilizer containing a seed grind and a method of using the fertilizer to enhance plant growth
US11634366B2 (en) 2020-04-15 2023-04-25 Innovations for World Nutrition, LLC Plant growth enhancer using carbon dioxide to increase plant yield and method of increasing plant yield
US11787749B2 (en) 2020-04-15 2023-10-17 Innovations for World Nutrition, LLC Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560558A (en) * 1925-09-11 1925-11-10 Harry R Fulton Process for prevention of decay of citrous fruits
US3867384A (en) * 1972-09-01 1975-02-18 Greg A Bullock 2-Amino-4(3H)-quinazolinones
JPS5396319A (en) * 1977-01-31 1978-08-23 Tokyo Yuuki Kagaku Kougiyou Kk Disease protecting agent for agriculture and horticulture
US4599233A (en) * 1978-07-13 1986-07-08 Rikagaku Kenkyusho Agricultural and horticultural fungicide and fruit storage disease preventing agent and process for production thereof
US4952402A (en) * 1984-10-30 1990-08-28 Elan Corporation, P.L.C. Controlled release powder and process for its preparation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560558A (en) * 1925-09-11 1925-11-10 Harry R Fulton Process for prevention of decay of citrous fruits
US3867384A (en) * 1972-09-01 1975-02-18 Greg A Bullock 2-Amino-4(3H)-quinazolinones
JPS5396319A (en) * 1977-01-31 1978-08-23 Tokyo Yuuki Kagaku Kougiyou Kk Disease protecting agent for agriculture and horticulture
US4599233A (en) * 1978-07-13 1986-07-08 Rikagaku Kenkyusho Agricultural and horticultural fungicide and fruit storage disease preventing agent and process for production thereof
US4952402A (en) * 1984-10-30 1990-08-28 Elan Corporation, P.L.C. Controlled release powder and process for its preparation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KIRK-OTHMER ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY, Third Ed., Volume 18, issued 1982, "Polyethers (Ethylene Oxide Polymers)", pages 616, 629-630. *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1809103A2 (fr) * 2004-10-12 2007-07-25 OMS Investments, Inc. Produits nutritifs moules pour la croissance des plantes et leurs procedes de production
EP1809103A4 (fr) * 2004-10-12 2011-09-28 Oms Investments Inc Produits nutritifs moules pour la croissance des plantes et leurs procedes de production
US8399020B2 (en) 2004-10-12 2013-03-19 Everris International B.V. Shaped plant growth nutrient products and processes for the production thereof
WO2011015305A3 (fr) * 2009-08-05 2011-04-14 Skw Stickstoffwerke Piesteritz Gmbh Agent antiagglomérant pour engrais à base d'urée, formulations d'engrais renfermant cet agent antiagglomérant, et procédé pour leur production
WO2014091279A1 (fr) * 2012-12-12 2014-06-19 Universidad De La Frontera Engrais azoté à libération contrôlée utilisant du biocharbon en tant que matrice support renouvelable
WO2015044039A1 (fr) * 2013-09-30 2015-04-02 Basf Se Compositions fongicides synergiques contenant du khc03
WO2016166010A1 (fr) * 2015-04-14 2016-10-20 Tischmacher Heinz Engrais contenant du bicarbonate d'ammonium
WO2018106544A1 (fr) * 2016-12-06 2018-06-14 Nc Brands, L.P. Agent acidifiant encapsulé hydrosoluble
US11040920B2 (en) 2017-12-15 2021-06-22 Innovations For World Nutrition Llc Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield
US11192830B2 (en) 2020-04-15 2021-12-07 Innovations for World Nutrition, LLC Seed coating to promote plant growth and method of increasing plant yield
US11358909B2 (en) 2020-04-15 2022-06-14 Innovations for World Nutrition, LLC Fertilizer containing a seed grind and a method of using the fertilizer to enhance plant growth
US11634366B2 (en) 2020-04-15 2023-04-25 Innovations for World Nutrition, LLC Plant growth enhancer using carbon dioxide to increase plant yield and method of increasing plant yield
US11787749B2 (en) 2020-04-15 2023-10-17 Innovations for World Nutrition, LLC Fertilizer and plant growth promoter to increase plant yield and method of increasing plant yield
US12017964B2 (en) 2020-04-15 2024-06-25 Innovations for World Nutrition, LLC Plant growth enhancer using carbon dioxide to increase plant yield

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