Solid herbicide composition containing fluorine to chlorine ratio

A fluorine-to-chlorine ratio, herbicide technology, applied in biocides, animal repellents, plant growth regulators, etc., can solve the problems of incompetent biological efficacy, inability to fully disperse solid preparations, and physical instability.

Active Publication Date: 2021-09-03
CORTEVA AGRISCIENCE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This physical instability can lead to poor dispersion of solid formulations in water and the formation of unstable suspensions that deliver substandard biological efficacy to target pests following spray application

Method used

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  • Solid herbicide composition containing fluorine to chlorine ratio
  • Solid herbicide composition containing fluorine to chlorine ratio
  • Solid herbicide composition containing fluorine to chlorine ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Example 1 . Preparation of said composition

[0117] sample 1 .Preparation of highly loaded herbicide granule compositions from spray-dried powders

[0118] The oil phase composition of the molten technical fluorine-to-chlorine ratio is heated between 70°C-80°C and a three-stage (coarse, medium and fine) type rotor-stator on-line homogenizer (IKA Magic LAB), with 1.79 water phase / oil phase flow ratio and the water phase (Table 1) also maintained between 70°C-80°C for on-line (in-line ) to form an oil-in-water emulsion having the following particle size distribution: d50 of about 3 micrometers (μm) and d90 of about 7 μm. A particle size distribution with a d50 of less than 2 μm is obtained when the tip speed is increased to about 25 m / s. Alternatively, an oil-in-water emulsion is prepared in batch mode by adding the heated oil phase to the heated water phase in a vessel with agitation and then recirculating it by passing it discretely through an in-line homogenizer ...

Embodiment 2

[0129] Example 2 .Storage Stability of Highly Loaded Herbicide Granular Compositions

[0130] Particle Size, Wet Sieving and Dispersion Time Test Methods

[0131] Particle size analysis : After dispersing a small sample of the extruded particles in 342 ppm hard water at room temperature, the particle size distribution of the resulting particle dispersion was determined using a Mastersizer 2000 laser diffraction particle size analyzer and reported as d in microns (μm) 50 / d 90 value.

[0132] wet sieve test : After dispersing a weighed sample of extruded particles in 342 ppm hard water at room temperature, the resulting particle dispersion and several water rinses were passed through a 200 mesh screen. The material remaining on the screen was dried, weighed and reported as weight % of the original test sample of extruded granules.

[0133] Dispersion time measurement

[0134] a) Weigh 0.1g of the particle sample into a 25mL beaker;

[0135] b) Add 100 mL of 342 ppm...

Embodiment 3

[0144] Example 3 . Differential Scanning Calorimetry Analysis of Spray Dried Powder (Sample 1)

[0145] Differential scanning calorimetry (DSC) indicated that the fluorine to chlorine ratio contained in the spray-dried powder (Table 3) reached almost complete crystallinity within about 48 hours after spray-drying.

[0146] DSC thermal data heat flow (absorption)

[0147] 100% crystalline fluorine to chlorine ratio sample 70.01J / g

[0148] Spray-dried powder (65.92% fluorine to chlorine ratio) 43.28J / g

[0149] (Fluorine to Chlorine Ratio in Spray Dried Powder) Calculation of crystallinity

[0150] Heat flow into spray dried powder (if 100% crystallized) = (70.01J / g) x 65.92% = 46.15J / g

[0151] Crystallinity of spray-dried powder = [(43.28J / g) / (46.15J / g)] x 100 = 93.8%

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Abstract

The present disclosure relates to herbicide granules and powders containing high loading fluorine to chlorine ratios. The granules exhibit good storage stability and good herbicidal efficacy when added to water and applied by spray application to control unwanted plant growth.

Description

Background technique [0001] Agrochemical formulations are usually designed based on customer needs and the physicochemical properties of the active ingredient, such as its solubility in water or non-aqueous solvents. Agrochemical formulations are prepared as solid or liquid formulations. [0002] Today we see an increasing number of applications of solid agricultural compositions containing insecticidal active ingredients, such as dispersible granular (DG) products, due to their relative safety compared to liquid formulations and their ease of use in packaging and transportation. Advantages provided in terms of cost savings. These products can be used for insect, weed, fungal disease, and nematode control. [0003] In some cases, the ability to formulate certain active ingredients into solid dosage forms may be difficult because these active ingredients have low melting points (eg, below about 80°C to 100°C). The processing of such active ingredients into formulated product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/10
CPCA01N43/40A01N25/26A01N59/10A01N25/30A01N59/02A01N59/08A01N2300/00
Inventor A·巴特拉D·J·艾德里安R·E·布歇J·C·埃尔坎普H·戴夫H·沈
Owner CORTEVA AGRISCIENCE LLC
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