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Cellulose ether as a drift control agent and rainfastness agent

一种纤维素醚、除草剂的技术，应用在杀生剂、动物驱避剂、植物生长调节剂等方向，能够解决低漂移控制性能等问题

Inactive Publication Date: 2015-11-11
NOURYON CHEM INT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cellulose derivatives are superior to guar and xanthan gums due to their abundant and renewable properties, these cellulose derivatives have minimal drift control properties

Method used

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  • Cellulose ether as a drift control agent and rainfastness agent
  • Cellulose ether as a drift control agent and rainfastness agent
  • Cellulose ether as a drift control agent and rainfastness agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1. Viscosity of different cellulose ether polymers in 1% aqueous solution

[0031] Different cellulose ether polymers (i.e. EHEC, MEHEC and HMEHEC) are graded Available from AkzoNobel. Furthermore, the preparation of MEHEC is described in International Patent Application WO2012 / 080301 and US Patent 7,319,146, both of which are incorporated herein by reference in their entirety.

[0032] In a 250 ml glass beaker (12 cm high, 6.5 cm diameter) 2.00 g of cellulose ether polymer was dispersed in about 50 ml of deionized water. The dispersion was kept vortexing until free of lumps. 50 ml of a pH=7 buffer solution was added at ambient temperature, and then deionized water was added to adjust the total weight to 200 g. The dispersion was then stirred at 60 rpm for 2 hours and placed in a water bath at 20°C for 1.5 hours before the viscosity was measured. The viscosity of the 1% solution was measured in a beaker at 12 rpm using a Brookfield viscometer model LV with ...

Embodiment 2

[0035] Example 2: Effect of different cellulose ether polymers on drift control performance

[0036] It is generally accepted that the most driftable spray droplet sizes are those below about 150 μm. The preferred range of droplet size diameters for commercial aerial sprays is from about 200 microns to about 400 microns.

[0037] Spray droplet distribution measurements were performed using a Sympatec Helos / R laser diffraction particle size analyzer equipped with an R6 lens capable of detecting droplets from 0.5-1750 μm in air. "Volume % < 150 μm" is a value describing the volume percentage of droplets whose size is smaller than 150 μm.

[0038] The nozzle used in this test was a TEEJET 8002 flat fan nozzle. The aqueous solution under investigation was sprayed through a nozzle at a pressure of 40 psi N2. These nozzles are designed to produce many fine droplets. For water, a typical volume % of 48-53% droplets with a size 30%. It is understood that the higher the percentage...

Embodiment 3

[0048] Example 3: Effects of Herbicides on the Drift Control Performance of MEHEC1

[0049] It is well known that pesticide formulations can have a significant impact on the performance of drift control agents due to the presence of surfactants in the formulation. To examine the effects of pesticide formulations, MEHEC1 was added to two of the most commonly used herbicides: glyphosate (from WeatherMax) and 2,4-D (2,4-D dimethylamine salt). WeatherMax contains K-glyphosate and some surfactants.

[0050] Significant reductions in driftable fines were achieved when MEHEC1 was combined with 1% ae glyphosate WeatherMax or 1.0% ae2,4-DDMA. The results are shown in Table 3.

[0051] Table 3. Drift control performance of MEHEC1 in RoundupWeatherMax and 2,4-DDMA spray solutions

[0052]

[0053] The results in Table 3 show that MEHEC1 is robust and capable of reducing fine droplets by -35% in water, by -38% in WeatherMax and in 2,4-DDMA -48% reduction. This reduction is great...

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PUM

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Abstract

The present invention is directed to an agricultural composition comprising at least one agricultural chemical and at least one cellulose ether, wherein the cellulose ether is a nonionic methylethylhydroxyethyl cellulose (MEHEC) polymer. The present invention is also directed to a method for reducing spray drift during the spraying of an aqueous solution. The method comprises: providing a nonionic MEHEC polymer; combining the MEHEC polymer with at least one agricultural chemical to obtain the aqueous solution; and spraying the aqueous solution. Further, the present invention is also directed to a method for increasing resistance to rain wash off of an aqueous solution sprayed onto a surface. The method comprises: providing a nonionic MEHEC polymer; combining the MEHEC polymer with at least one agricultural chemical to obtain the aqueous solution; and spraying the aqueous solution onto the surface.

Description

field of invention [0001] The invention relates to a novel cellulose ether capable of reducing spray drift and resisting rain erosion during the spraying process of an aqueous solution containing the cellulose ether. Background of the invention [0002] Fine droplets in the spray produced during spraying of pesticide formulations may be wind-moved, thus exposing humans, wildlife and the environment to pesticide residues, which may have health and environmental impacts and may cause property damage. [0003] Various methods have been proposed in an attempt to reduce the amount of fine liquid droplet drift during spraying of an aqueous pesticide solution. One approach is to change the nozzle design to allow larger spray droplets as the liquid passes through the nozzle. Another approach is to use drift control chemicals. Various drift control agents are known, including polymers and surfactants. One useful class of polymers are high molecular weight water-soluble polysacchar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/24A01N39/04
CPCA01N25/24A01N39/04A01N2300/00A01N37/40A01N57/20A01N25/02
Inventor J·S·孙Q·贺S·朱L·登普西M·沃尔特斯P·韦斯特拜耶
Owner NOURYON CHEM INT BV
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