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Pesticide water effervescent dispersible tablet and preparation method thereof

A technology for effervescent tablets and pesticides, applied in the fields of botanical equipment and methods, pesticides, biocides, etc., can solve the problems of easy decomposition, instability, user injury, etc., achieve stable chemical properties, and avoid the degradation of active ingredients. Effect

Inactive Publication Date: 2012-12-19
FIVESTAR NANTONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the pesticide preparations in my country are mainly emulsifiable concentrates and powders. Because the emulsifiable concentrates use a large amount of chemical solvents such as toluene and xylene, they will cause great harm to the environment and users. Especially serious, these two kinds of dosage forms also have the metering difficulty when packaging and using, and water dispersible effervescent tablet is owing to have specific shape, accurate single piece weight, no solvent, no drift, easy to use, simultaneously has foaming and boiling, fast Disintegration, high suspension rate and dispersion performance, is a new environmentally friendly pesticide formulation, has become a new field of rapid development of pesticide formulations
[0005] Pesticide water-dispersible effervescent tablets are generally composed of pesticide technical material, acid source, carbon dioxide source, surfactant, flow aid, binder, inert filler, etc., as described in patent numbers 00107465.2 and 200610104832.3, but most Pesticide products are either unstable to acid or alkali, and are easily decomposed, resulting in poor chemical stability of the product, degradation of active ingredients, and reduced use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of 5% emamectin emamectin saline dispersible effervescent tablet (the percentages in this embodiment are all mass percentages):

[0033] (1) Preparation of 6.17% emamectin benzoate masterbatch: accurately measure 8.8kg of 70% emamectin emamectin original drug, 12kg of tartaric acid, 2kg of sodium lignosulfonate, 6kg of naphthalene sulfonate, 25kg of corn starch, and 44.7kg of kaolin Mix evenly in a mixer, crush it to more than 500 mesh by jet milling, collect the powder in another mixer, add 15.5kg of aqueous solution dissolved in 10% sodium carboxymethyl starch and knead, and obtain by extrusion granulation The columnar wet granules are dried until the water content is less than 1%, and then sieved by the vibrating sieve of the granulator, and the 30-60 mesh granules are taken for use;

[0034] (2) Tablet compression: Mix 81kg of the masterbatch, 18kg of ammonium bicarbonate, and 1kg of white carbon black prepared in the above (1) that have been accurately ...

Embodiment 2

[0040] Preparation of 40% acetamiprid water-dispersible effervescent tablet (the percentages in this example are all mass percentages):

[0041] (1) Preparation of 49.4% acetamiprid masterbatch: Accurately measured 96% acetamiprid technical 51.5kg, citric acid 12kg, acrylic acid homopolymer sodium salt 2kg, naphthalene sulfonate 8kg, corn starch 15kg, talc Mix 9.8kg of powder evenly in a mixer, crush it to more than 500 mesh by jet milling, collect the powder in another mixer, add 17kg of aqueous solution containing 10% PEG6000 and knead, and obtain irregular Wet granules are dried until the water content is less than 1%, and then sieved by a vibrating sieve of a granulator, and 30-60 mesh granules are taken for use;

[0042](2) Tablet compression: Mix 81kg of the masterbatch, 18kg of ammonium bicarbonate, and 1kg of magnesium stearate prepared in the above (1) that have been accurately measured in a mixer, and then press it into a round tablet in a tablet machine. The diamet...

Embodiment 3

[0048] Preparation of 10% penoxsulam water-dispersible effervescent tablet (the percentages in this example are all by mass):

[0049] (1) Preparation of 14.0% penoxsulam masterbatch: accurately measure 14.7kg of 95% penoxsulam technical material, 49kg of potassium carbonate, 3kg of acrylic acid homopolymer sodium salt, 8kg of naphthalenesulfonate, 15kg of corn starch, 8.7kg of diatomaceous earth were mixed uniformly in the mixer, and it was pulverized to more than 500 mesh by jet milling, and the powder was collected in another mixer, and 16kg of 7% sodium carboxymethyl starch and Knead with 3% PEG4000 aqueous solution, obtain irregular wet granules through wet granulation, dry until the water content is less than 1%, and then sieve through the granulator vibrating sieve, and take 30-60 mesh granules for use;

[0050] (2) Tablet compression: Mix 71.5kg of masterbatch, 27kg of ammonium bicarbonate, 1kg of white carbon black, and 0.5kg of talcum powder prepared in the above (1)...

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PUM

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Abstract

The invention discloses a pesticide water effervescent dispersible tablet and a preparation method thereof. According to the pesticide water effervescent dispersible tablet and the preparation method thereof, ammonium hydrogen carbonate is used as a gas source, and an acid source or alkali source is selected according to the physical property of different raw materials, i.e. the acid source and the ammonium hydrogen carbonate are added into the acid-resistant raw materials, and tablets are put into water to produce carbon oxide during use; and the alkali source and the ammonium hydrogen carbonate are added into the alkali-resistant raw materials, and tablets are put into water to produce ammonia gas. The pesticide water effervescent dispersible tablet can rapidly boil and disintegrate in water and therefore avoid the reduction of application effect caused by degradation of effective components of the pesticide effervescent dispersible tablet, so that the pesticide water effervescent dispersible tablet with stable chemical properties is obtained.

Description

technical field [0001] The invention relates to the field of pesticide processing, in particular to a pesticide soaked and dispersed tablet and a preparation method thereof. Background technique [0002] Effervescent tablet is a rapidly developing new pesticide dosage form. The tablet can quickly generate a large number of air bubbles when it meets water, foam and boil in water, and disintegrate quickly, and evenly disperse the active ingredients in water to form a pesticide with good effect. Effective solution or water dispersion system, high suspension rate and dispersibility. [0003] The basic principle of the pesticide water-dispersible effervescent tablet is that the tablet contains acidic substances (acid source, generally citric acid, tartaric acid, fumaric acid, etc.) salts, such as ammonium bicarbonate, sodium carbonate, etc.), when the tablet meets water, the acid source and the gas source undergo a neutralization reaction to release carbon dioxide, thereby achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/34A01N43/90A01N47/40A01N43/56A01N43/653A01P7/04A01P13/00A01P3/00
Inventor 张惠明
Owner FIVESTAR NANTONG CHEM
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