Microencapsulated oils for controlling pesticide spray drift

一种微囊化、杀虫剂的技术，应用在杀生剂、微胶囊制剂、应用等方向，能够解决高分子量水溶性聚合物不能完全令人满意、除草剂容器混合物使用等问题

Active Publication Date: 2013-02-13
CORTEVA AGRISCIENCE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high molecular weight water-soluble polymers are not entirely satisfactory because they are generally not usable with many aerial-applied herbicide container mixtures due to pump shear, wind shear, and various other performance issues more pronounced under application conditions

Method used

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  • Microencapsulated oils for controlling pesticide spray drift
  • Microencapsulated oils for controlling pesticide spray drift
  • Microencapsulated oils for controlling pesticide spray drift

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using a Silverson homogenizer, will contain 132.68g soybean oil methyl ester (methyl soyate) and 13.95g 27 The organic phase of diphenylmethane diisocyanate (registered trademark of Dow Chemical Company) was emulsified to contain 30.0 g 4913 polymeric surfactant (registered trademark of Croda Inc.), 7.50 g 15-S-7 nonionic surfactant (registered trademark of Dow Chemical Company), 0.39 g GXL preservative (registered trademark of Arch Chemicals Inc.) and 112.13 g deionized water in the aqueous phase. The resulting crude emulsion was passed through a Niro high pressure homogenizer twice at 800-1200 bar (80,000-120,000 kPa). Polyurea capsule walls were then formed by adding 3.33 g of a 10% aqueous solution of ethylenediamine with gentle stirring. The resulting capsule suspension had a volume median particle size of 0.34[mu] as measured using a Malvern Mastersizer 2000 Laser Diffraction Particle Analyzer.

[0030] To 3.68 g of the above methyl soybean oil sac suspens...

Embodiment 2

[0035] Using a Silverson homogenizer, will contain 340.53g soybean oil methyl ester and 9.05g The organic phase of 27 (registered trademark of Dow Chemical Company) was emulsified to contain 96.0 g 4913 (registered trademark of Croda Inc.), 24.0 g 15-S-7 (registered trademark of Dow Chemical Company), 1.20 g GXL (registered trademark of Arch Chemicals Inc.) and 358.8 g of deionized water in the aqueous phase. Increase the speed on the homogenizer until the volume median droplet size is approximately 0.8 μ. Polyurea capsule walls were then formed by adding 21.73 g of a 10% aqueous solution of ethylenediamine with gentle stirring. The resulting capsule suspension had a volume median particle size of 0.72[mu].

[0036] A herbicide concentrate comprising 456 g ae / L 2,4-D choline salt and 10 wt % of the above soybean oil methyl ester microcapsule suspension was prepared as follows: 39.91 g 45.7% ae 2,4-D choline was added to the vial Solution (prepared by mixing equimolar ...

Embodiment 3

[0041]Contrast adding and not adding the soybean oil methyl ester sac suspension prepared in embodiment 2 containing ammonium sulfate (AMS) Spray performance of 280SL herbicide (registered trademark of Bayer CropScience; 2.34 lbae / gal glufosinate-ammonium). To the vial was added sequentially 284.33 g deionized water, 15.03 g 40% w / w ammonium sulfate in water and 3.97 g 280SL. Shake the vial by hand until homogeneous. To prepare the capsule-containing spray solution, to a second vial was added sequentially 283.57 g deionized water, 15.03 g 40% w / w aqueous ammonium sulfate, 3.97 g 280SL and 0.76 g of the soybean oil methyl ester capsule suspension prepared in Example 2. Shake the second vial by hand until homogeneous. The solution was then sprayed following the same procedure and settings as described in Example 1. The results are shown in Table 3.

[0042] table 3

[0043]

[0044]

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PUM

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Abstract

Spray drift during the application of agricultural chemicals is reduced by incorporating microencapsulated oils into the aqueous solution or mixture to be sprayed.

Description

Technical field [0001] The present invention relates to a new method of reducing spray drift during the application of agricultural chemicals by incorporating microencapsulated oil compositions into aqueous spray mixtures. Background technique [0002] Agricultural spraying by economical and efficient technology uses hydraulic nozzles that inherently produce a wide range of spray droplet sizes. The likelihood of these spray droplets drifting from the originally desired site of application was found to be a function of droplet size, with smaller droplets having a higher tendency to undergo off-target movement. Significant research efforts, including multiple field trials, wind tunnel testing and subsequent generation of predictive mathematical models, have greatly improved understanding of the relationship between spray droplet size and the potential for off-target drift. Although other factors such as meteorological conditions and spray boom height increase the likelihood o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/28A01N37/40A01N57/20
CPCA01N25/04A01N25/06A01N57/20A01N37/40A01N25/28B01J13/16A01N39/04
Inventor S.威尔逊B.唐纳秦奎德刘雷H.坦克李梅D.奥斯章宏
Owner CORTEVA AGRISCIENCE LLC
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