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US 4,048,337 AGranted
Gypsum dust diluents for use in pesticides and fertilizing products
OwnerBruno Fabbianinventor
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OwnerBruno Fabbianinventor
Estimating the term…
Dust diluents and carriers of the gypsum series are prepared in granular or powder form, with absorbing properties, for use in pesticides and leaf and soil fertilizing products, from minerals of the gypsum series, particularly hydrated sulphates of selenite, sericulite, alabaster or anhydrous sulphate form, or the anhydrite form. The calcium sulfate is baked in order to produce baked, Alpha, Beta, or hydraulic chalk, according to the baking temperature; it is deactivated and water is added to form a dispersion which is allowed to settle. A substance is added which may be a salt of an alkaline or alkaline-earth metal, or double aluminum and potassium sulphate, a source of electrons, an oxygen or nitrogen donor, a non-ionic, anionic, cationic surface active agent or mixtures thereof, a vegetable polymer, a polymerized vegetable gum, a polymerized vegetable oil, polyvinyl chloride or acetate in natural condition or emulsified, a specific setting retarder, a tannic derivative, a ligninsulphite or a ligninsulphonate of alkaline or earth-alkaline metal or of an amphoteric metal, or a specific synthetic plasticizing product for plastic or polymerizable materials or for rubber mixtures. The products have little or no acidic centers, no surface catalytic activity nor cationic exchange capacity.
A method of producing a dust diluent of carrier for pesticides from anhydrous or hydrated calcium sulfate, in granular or powder form, comprising the steps of baking a mineral consisting essentially of calcium sulfate at a temperature between 120.degree.-130.degree. C to produce baked chalk, at a temperature of 130.degree.-300.degree. C to produce alpha chalk, at a temperature between 300.degree.-600.degree. C to produce beta chalk, at a temperature between 600.degree.-800.degree. C to produce gamma chalk and at a temperature between 800.degree.-1000.degree. C to produce hydraulic chalk, adding water to disperse or dissolve at least one of said baked products and allowing settling to occur, adding a substance which is a double sulfate of aluminum and potassium, a non-ionic, an anionic or cationic surface active agent, carboxymethylcellulose, urea, a glycol, hexamethylene-tetramine, sodium bisulfate dihydrate, polyvinyl acetate, polyvinyl chloride, monobasic calcium phosphate, a polymerized vegetable adhesive, or a polymerized vegetable oil, drying, pellitizing or grinding so as to obtain a product in granular or powder form having essentially no acidic centers, no surface catalytic activity and no
A diluent or carrier for incorporation in a pesticidal product containing a pesticidally active ingredient comprising crystals of calcium sulfate dihydrate and an additive in an amount effective to reduce the rate of decomposition of the pesticidally active ingredient, and additive being a double sulfate of aluminum and potassium, a non-ionic, anionic or cationic surface active agent, carboxymethylcellulose, urea, a glycol, hexamethylene-tetramine, sodium bisulfate dihydrate, polyvinyl acetate, polyvinyl chloride or monobasic calcium phosphate, said additive being in the amount of 0.001-10%, said diluent or carrier having 0.05-3% moisture, being of pH 6-9 and of hydroscopicity 0.3 up to 5%, essentially free of
A diluent or carrier for incorporation in pesticidal compositions containing a pesticidally active ingredient prepared by baking a calcium sulfate mineral at a temperature between 120.degree.-1000.degree. C to produce baked chalk, alpha chalk, beta chalk, gamma chalk or hydraulic chalk, adding water in amount between 15 and 70% of the weight of said baked calcium sulfate to form a dispersion, allowing settling to occur, adding 0.001-10% by weight of an additive, in an amount which is effective to reduce the rate of decomposition of the pesticidally active ingredient, said additive being a double sulfate of aluminum and potassium, a non-ionic, anionic or cationic surface active agent, carboxymethylcellullose, urea, a glycol, hexamethylene-tetramine, sodium bisulfate dihydrate, polyvinyl acetate, polyvinyl chloride or monobasic calcium phosphate, converting the material thus obtained to granular or powdery form and drying at 30.degree.-300.degree. C.
Dependencies are inferred from the claim text.