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Amine and amine oxide surfactants for controlling herbicide spray drift

A surfactant, tertiary amine oxide technology, used in applications, biocides, animal repellents, etc.

Active Publication Date: 2013-07-17
CORTEVA AGRISCIENCE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some herbicides have been shown to be very sensitive phytotoxic to specific plant species at very low parts per million (ppm) or even parts per billion (ppb) levels, leading to their use around sensitive crops, around orchards and Restricted application around residential vegetation

Method used

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  • Amine and amine oxide surfactants for controlling herbicide spray drift
  • Amine and amine oxide surfactants for controlling herbicide spray drift
  • Amine and amine oxide surfactants for controlling herbicide spray drift

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: herbicide spray sample

[0041] Contains 228 grams acid equivalent per liter (g ae / L) of choline salt of 2,4-D, 240 g ae / L of dimethyl ammonium salt of glyphosate (DMA), 60 g / L propylene glycol and 36 g / L Herbicide concentrates (on a dry weight basis) of the indicated tertiary amine oxide surfactants were prepared as follows using aqueous samples of the following amine oxide surfactants:

[0042] 1. C, 30% w / w cocoalkyl dimethylamine oxide solution in water

[0043] 2. MO, 30% weight / weight (w / w) solution of tetradecyldimethylamine oxide in water

[0044] 3. MCO,30%w / w(C 14 and C 16 ) solution of linear alkyl dimethylamine oxide in water

[0045] 4. LO, 30% w / w lauryldimethylamine oxide solution in water

[0046] 5. LO, 30%w / w (C 12 and C 14 ) solution of linear alkyl dimethylamine oxide in water

[0047] 6. C / 12, 50% w / w solution of dihydroxyethyl cocoalkylamine oxide in water

[0048] 7. DO, 30% w / w solution of decyldimethylamine...

Embodiment 2

[0054] Example 2: Herbicide Concentrate

[0055] Herbicide containing 114g ae / L 2,4-D DMA, 120g ae / L glyphosate DMA, 30g / L propylene glycol and 18g / L (based on dry weight) of the tertiary amine oxide surfactant listed in Example 1 Dose concentrates were prepared as follows. First add 20.56 g of a 55.44 wt% ae2,4-D solution of DMA salt in water to a 100 mL volumetric flask. To the flask was added 3.00 g of propylene glycol and the liquid was blended by shaking the flask by hand until the contents were uniform. Next, a solution of 24.52 g of 48.95 wt% ae DMA salt of glyphosate in water was added to the volumetric flask. The volumetric flask was shaken again by hand until the contents were blended and homogeneous. Next, a tertiary amine oxide surfactant (3.60 g C / 12; 6.00 g for all other samples) and the flask was shaken manually until the contents were blended and homogeneous. Finally, add deionized water and fill the volumetric flask to the 100 mL mark. The samples were ...

Embodiment 3

[0059] Embodiment 3: containing dicamba diglycol ammonium (DGA) salt, glyphosate isopropyl ammonium (IPA) salt and tertiary In-tank mix spray solution of amine oxide surfactants

[0060] A tank mix spray solution containing dicamba diglycol ammonium (DGA) salt, glyphosate isopropyl ammonium (IPA) salt and tertiary amine oxide surfactant was prepared as follows. First add 276.73 mL of deionized water to the sample container, then add 4.56 g of 30% w / w LO solution and mix. Next, add 11.22mL Herbicide concentrate (commercially available 4 pounds of acid equivalent / gallon (lb ae / gal) glyphosate IPA salt solution obtained from Dow AgroSciences, LLC) and 7.49 mL Herbicide concentrate (commercially available 4 lb ae / gal solution of dicamba DGA salt obtained from BASF Corporation (Florham Park, NJ)), then the samples were shaken manually until the mixture was homogenous (<1 minute). The samples were used in Example 1 The spray was carried out by the same method and technique...

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Abstract

Spray drift during the application of an aqueous mixture of glyphosate and an herbicide is reduced by incorporating certain tertiary amine or tertiary amine oxide surfactants into the aqueous solution or mixture to be sprayed.

Description

[0001] Cross-references to related applications [0002] This application claims priority from U.S. Provisional Patent Application 61 / 380,074, filed on September 15, 2010. Background technique [0003] 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 of drift, spray droplet size distribution has been fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/00
CPCA01N57/20A01N25/30A01N33/16A01N37/40A01N39/04A01N43/40A01N25/06A01N25/24A01N57/00A01N57/10A01N33/02A01N2300/00
Inventor B.M.唐纳李梅刘雷秦奎德H.坦克S.L.威尔森章宏
Owner CORTEVA AGRISCIENCE LLC
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