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Trifluralin micro-capsule granule and preparation method thereof

A technology of microencapsulated granules and trifluralin, which is applied in the fields of botanical equipment and methods, biocides, biocides, etc., can solve the problems that affect the promotion and application of preparations, easily cause phytotoxicity, and have a short duration of effect, etc. To avoid the problem of pesticide damage, reduce the number of spraying, and reduce the effect of decomposition

Inactive Publication Date: 2015-07-22
TARIM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microcapsule suspension preparation solves the shortcomings of trifluralin, which is easy to decompose when exposed to light, has a short duration of action, and is prone to phytotoxicity, but the preparation is prone to stratification, low-temperature solidification, and room-temperature creaming during transportation and storage. Seriously affect the popularization and application of the preparation in production

Method used

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  • Trifluralin micro-capsule granule and preparation method thereof
  • Trifluralin micro-capsule granule and preparation method thereof
  • Trifluralin micro-capsule granule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Preparation of Trifluralin Microcapsules

[0022] Table 1 - Raw material formula of trifluralin microcapsules

[0023] components

[0024] Xylene

[0025] Dissolve 12g of trifluralin and 1g of 2-hydroxy-4-methoxybenzophenone in 15g of xylene at room temperature, add 3g of styrene-maleic anhydride copolymer sodium salt, 2g of triphenylethyl Base phenol polyoxyethylene polyoxypropylene ether, 3g sodium dodecylbenzenesulfonate, 1g xanthan gum and 20g urea-formaldehyde resin prepolymer, make up to 100g with deionized water, and react with high-speed stirring at 1500 rpm for 1h. After the oil-in-water emulsion is formed, reduce the rotation speed to 800 rpm, and add ammonium chloride solution in 6 batches within 1 hour to adjust the pH of the system to 3.0. After 1 hour of polymerization, gradually raise the temperature to 60°C to solidify the capsule wall for 2 hours. Add sodium hydroxide to adjust the pH to 7.0, add 3.0g sodium lignosulfo...

Embodiment 2

[0026] Embodiment 2: the preparation of trifluralin microcapsules

[0027] Table 2- Raw material formula of trifluralin microcapsule granules

[0028] components

[0029] Dissolve 18g of trifluralin and 1g of 2,4-dihydroxybenzophenone in 20g of xylene at room temperature, add 2.5g of styrene-maleic anhydride copolymer sodium salt, 2g of alkylphenol polyoxygen Ethylene polyether and its sulfate, 1.5g sodium dodecylbenzenesulfonate, 0.3g polyvinyl alcohol and 24g urea-formaldehyde resin prepolymer aqueous solution, supplemented with deionized water to 100g, stirred and reacted at a high speed of 1500 rpm for 1h, and waited After the oil-in-water emulsion is formed, reduce the rotation speed to 800 rpm, and add ammonium chloride solution in 6 batches within 1 hour to adjust the pH of the system to 3.0. After 1 hour of polymerization, gradually raise the temperature to 60°C to solidify the capsule wall for 2 hours. Add sodium hydroxide to adjust the pH to 7.0, add 3.0g ...

Embodiment 3

[0030] Embodiment 3: Preparation of trifluralin microcapsules

[0031] Table 3- Raw material formula of trifluralin microcapsules

[0032] components

[0033] Deionized water

[0034] Dissolve 24g of trifluralin, 0.8g of 2-hydroxy-4-methoxybenzophenone, and 0.2g of phenyl o-hydroxybenzoate in 25g of xylene at room temperature, and add 4g of styrene- Maleic anhydride copolymerized sodium salt, 2g triphenylethylphenol polyoxyethylene polyoxyethylene ether, 3g sodium dodecylbenzenesulfonate, 0.2g gum arabic and 28g urea-formaldehyde resin prepolymer, deionized water added to 100g, Stir and react at a high speed of 1500 rpm for 1 hour. After the oil-in-water emulsion is formed, reduce the speed to 800 rpm. Add ammonium chloride solution in 6 batches within 1 hour to adjust the pH of the system to 3.0. After 1 hour of polymerization, Gradually raise the temperature to 60°C to solidify the capsule wall for 2 hours, then add sodium hydroxide to adjust the pH to ...

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Abstract

The invention discloses a trifluralin micro-capsule granule and a preparation method thereof. The trifluralin micro-capsule granule is prepared from the following raw materials in parts by weight: 12 to 30 parts of trifluralin, 15 to 25 parts of a solvent, 17 to 28 parts of urea-formaldehyde resin, 7 to 10 parts of an emulsifier, 2 to 3 parts of a dispersant, 0.5 to 1 part of an anti-freezing agent, 0.5 to 1 part of a viscosity regulator, 0.1 to 1 part of an ultraviolet absorber, 0.1 to 100 parts of water, and a proper amount of a pH regulator. The invention further discloses a preparation method for the trifluralin micro-capsule granule. According to the trifluralin micro-capsule granule disclosed by the invention, the stability and the safety of a preparation are improved through microencapsulation; meanwhile, the lasting period of the preparation is prolonged.

Description

technical field [0001] The invention relates to a pesticide microcapsule and a preparation method thereof, in particular to a microcapsule of trifluralin and a preparation method thereof. Background technique [0002] Trifluralin is a widely used dinitroaniline soil treatment herbicide, which is mainly absorbed by the coleoptile and hypocotyl of weeds, and is widely used in a variety of crops to control unearthed gramineous grasses and some small-grained broad-leaved species Weeds such as barnyardgrass, crabgrass, goosegrass, stepwort, teff, bluegrass, brome, hard grass, clubhead grass, amaranthus, quinoa, purslane, chickweed, polygonum oleracea , Biancu, Li and other annual grasses have a broad spectrum; and the drug cost of difluralin EC per mu is a quarter of that of pendimethalin EC, and the price is cheap. [0003] At present, the trifluralin preparation circulating in the market is 48% trifluralin emulsifiable concentrate. Because trifluralin is easy to decompose when...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N25/22A01N33/18A01P13/00
Inventor 董红强熊仁次杨明禄朱天生滕立平陈小飞
Owner TARIM UNIV
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