Pretilachlor microcapsule suspension and preparation method thereof

A technology of microcapsule suspension and pretilachlor, which is applied in the field of pretilachlor microcapsule suspension and its preparation, can solve the problems of low safety factor and difficult adjustment, and achieve small investment, long duration of drug effect, less corrosive effect

Active Publication Date: 2019-01-15
HUNAN UNIV OF HUMANITIES SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a low safety factor and is difficult to adjust

Method used

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  • Pretilachlor microcapsule suspension and preparation method thereof
  • Pretilachlor microcapsule suspension and preparation method thereof
  • Pretilachlor microcapsule suspension and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: 15% pretilachlor microcapsule suspension

[0029] Weigh 15% pretilachlor, 5% capsule wall material PM-200, 6% solvent S-200#, 3.6% emulsifier T-60 (Tween 60), 2% dispersant MF, 6% Aqueous solution of xanthan gum (concentration of xanthan gum is 1%), make up to 100% with water; dissolve pretilachlor, capsule wall material PM-200 and emulsifier T-60 into organic solvent S-200# and stir well, The oil phase was obtained; the dispersant MF was dissolved in water to form a water phase; the oil phase was poured into the water phase and sheared and emulsified at 2500 r / min to obtain an emulsion with an average particle size between 1.5 and 3.5 μm. Gradually raise the temperature under the condition of 35 °C for 1.5 h, 45 °C for 1 h, and 55 °C for 1.5 h, stop heating, add thickener xanthan gum, continue stirring for 1 h to obtain 15% pretilachlor microcapsules suspending agent.

[0030] The content of pretilachlor in the preparation measured by high performance l...

Embodiment 2

[0031] Embodiment 2: 20% pretilachlor microcapsule suspension

[0032] Take by weight 20% pretilachlor, 5% capsule wall material PM-200, 6% solvent S-200#, 3.6% emulsifier T-60, 2% dispersant MF, 6% xanthan gum aqueous solution ( The concentration of xanthan gum is 1%), water is added to 100%; pretilachlor, capsule wall material PM-200 and emulsifier T-60 are dissolved in organic solvent S-200# and stirred to obtain the oil phase; disperse The agent MF was dissolved in water to form a water phase; the oil phase was poured into the water phase, and after shear emulsification at 2500 r / min to obtain an emulsion with an average particle size between 1.5 and 3.5 μm, the temperature was gradually raised under the condition of 200 r / min , react at 35 °C for 1.5 h, at 45 °C for 1 h, and at 55 °C for 1.5 h, stop heating, add thickener xanthan gum, and continue stirring for 1 h to obtain 20% pretilachlor microcapsule suspension.

[0033] The content of pretilachlor in the preparation ...

Embodiment 3

[0034] Embodiment 3: 25% pretilachlor microcapsule suspension

[0035]Take by weight 25% pretilachlor, 5% capsule wall material PM-200, 6% solvent S-200#, 3.6% emulsifier T-60, 2% dispersant MF, 6% xanthan gum aqueous solution ( The concentration of xanthan gum is 1%), water is added to 100%; pretilachlor, capsule wall material PM-200 and emulsifier T-60 are dissolved in the organic solvent S-200# and stirred to obtain the oil phase; disperse The agent MF was dissolved in water to form a water phase; the oil phase was poured into the water phase, and after shear emulsification at 2500 r / min to obtain an emulsion with an average particle size between 1.5 and 3.5 μm, the temperature was gradually raised under the condition of 200 r / min After reacting for 1.5 h at 35 °C, 1 h at 45 °C, and 1.5 h at 55 °C, stop heating and add the thickener xanthan gum, and continue stirring for 1 h to obtain 25% pretilachlor microcapsule suspension.

[0036] The content of pretilachlor in the pre...

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Abstract

The invention discloses a pretilachlor microcapsule suspension and a preparation method thereof. The pretilachlor microcapsule suspension comprises following components in percentage by weight: 10 to30% of pretilachlor, 2 to 6% of capsule wall material, 1.5 to 5% of emulsifier, 1 to 5% of dispersant, 2.5 to 8% of solvent, 0 to 0.3% of thickening agent, and the balance being water. Pretilachlor isthe effective component, isocyanate and matched dispersant and emulsifier are taken as the auxiliary materials; and the prepared high quality pretilachlor microcapsule suspension has the advantages of high encapsulation rate, high dispersibility, and high suspension rate, has a long-lasting and stable effect on killing weeds in rice fields such as barnyard grass, is safe for the paddy rice, can effectively protect crops, and kills multiple weeds in fields such as barnyard grass.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, in particular to a pretilachlor microcapsule suspension and a preparation method thereof. Background technique [0002] Pretilachlor is an amide herbicide, chemical name: 2-chloro-2', 6'-diethyl-N-(2-propoxyethyl) acetylaniline, belonging to 2-chlorinated acetyl Aniline herbicides. Amide herbicides are selective pre-emergent herbicides developed by Swiss Novartis (NOVARTIS), which interfere with protein synthesis, affect respiration and photosynthesis, and cause weed death. The pure product of pretilachlor is a colorless liquid, easily soluble in most organic solvents, and has poor selectivity to direct-seeding rice. When used together with prochloraz, it has good selectivity to direct-seeding rice, and can effectively control barnyardgrass in rice fields , Qianjinzi, goosegrass, cow felt, Alisma narrow-leaf, water amaranth, special-shaped sedge, broken rice sedge, clove Polygonum, bermuda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N37/22A01N25/28A01N25/04A01P13/00B01J13/16
CPCA01N25/04A01N25/28A01N37/22B01J13/16
Inventor 刘秀王宏昆陈红军金晨钟
Owner HUNAN UNIV OF HUMANITIES SCI & TECH
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