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Stable concentrated pesticidal suspension

A technology for colloidal suspensions and pesticides, applied in the field of pesticide compositions, can solve the problems such as the concentration of active ingredients being easily limited

Inactive Publication Date: 2002-10-23
MONSANTO TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Emulsion concentrates and suspoemulsions have many attractive features, but one disadvantage is that the concentration of the active ingredient tends to be limited because large amounts of water must be contained as a solvent for the salt-forming pesticide and / or as a suspension medium for the solid particulate pesticide, in order to provide a stable emulsion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0082] The compositions of Inventive Examples 1, 3, 4 and 5 were prepared using a high shear homogenizer and the composition of Inventive Example 2 was prepared using a low shear mixer. It has now been found that it is preferred, if possible, to use a low shear mixer for the manufacture of the suspending compositions of the present invention.

[0083] The compositions of Examples 1, 2, 3 and 4 used unground solid pesticide and the composition of Example 5 used ground solid pesticide.

[0084] The compositions of Examples 1-5 were prepared using a two-phase addition method. During the first phase, with proper and thorough mixing, the solid pesticide is added to the liquid pesticide to form a Phase I mixture. During the second phase, the surfactants were first mixed together in any order, followed by the addition of silica to form the Phase II mixture. The Phase I and Phase II mixtures were then added with good agitation to form the final mixture.

[0085] The ingredients and...

Embodiment 6

[0097] The composition of Example 6 (Table 2) was prepared using a high shear homogenizer. This composition illustrates that small amounts of inert solvents suitable for assay adjustments may be included in the composition without adversely affecting the physical properties.

[0098] Example

6

Solid Pesticide: Glyphosate Acid

25.0

Liquid pesticide: 2,4-D diisooctyl ester

50.0

Witconate  1298HA 1

7.6

Alkylamine

1.4

2-Ethylhexanol

0.6

Witconol  CO-360 2

2.4

Witconol  CO-550 3

2.4

Witconol  NS-500LQ 4

4.9

Cyclosol  150 5

5.0

Aerosil  200 6

0.7

total weight%

100.0

Viscosity (cPs) at 25°C, 12rpm

2910

Physical stability at room temperature

stable

blooming

satisfactory

emulsion stability

satisfactory

[0099] 1 Sulfonic acid surfactant

[0100] 2-3 Ethoxylated castor o...

Embodiment 7-14

[0105] The compositions of Examples 7-14 were prepared by the following methods. First, the liquid ingredients are added in any order and shear mixed in a wet media mill such as a Waring blender. The solid ingredients (solid particulate pesticide and silica) were then added and further mixed to form a blend. 350 ml of this mixture was transferred to an Eiger mill and recirculated therein for about 30 minutes at a shaft speed of 1000 rpm.

[0106] The ingredients and amounts used to prepare the compositions of Examples 7-10 are listed in Table 3. The ingredients and amounts used to prepare the compositions of Examples 11-14 are listed in Table 4.

[0107] Example

[0108] 1 87.5% Glyphosate Acid Equivalent

[0109] 2 Blend of Sorbitan Resinate and Butanol EO / PO Block Copolymer

[0110] 3 Surfactants of the formula

[0111] where R 1 is C 12-15 Alkyl, n is 2 and x+y is 5, as disclosed in U.S. 5,750,468, incorporated herein by reference.

[0112] E...

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PUM

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Abstract

An emulsifiable pesticide suspension composition is provided, the composition contains (a) a pesticide-effective amount of a liquid pesticide with low solubility in water, such as a chloroacetamide herbicide such as acetochlor, (b) a pesticide-effective amount of Solid granular pesticides, especially salt-forming pesticides, such as glyphosate herbicides, which are dispersed in the form of solid particles in liquid pesticides, (c) a stabilizing amount of a suspending aid, (d) an emulsifier, and An amount sufficient to emulsify the concentrated composition in an appropriate amount of water to form a diluted sprayable composition, and (e) zero to assay adjusting amount of an inert liquid in which the liquid pesticide is soluble or miscible . The concentrate composition is substantially anhydrous. Liquid pesticides and solid pesticides should be selected to be chemically compatible with each other. According to the present invention, by substantially avoiding the use of water and inert organic solvents, it is possible to provide suspension compositions containing extremely high concentrations of active ingredients.

Description

field of invention [0001] The present invention relates to pesticide compositions useful in agriculture and related industries. More specifically, the present invention relates to a concentrated pesticide composition comprising a solid pesticide and a liquid pesticide, and a method of exterminating or controlling harmful organisms using the composition. Background of the invention [0002] Solid pesticides are generally formulated as emulsifiable suspensions, in which the active ingredients of the pesticide in the state of solid particles are usually suspended in an inactive liquid carrier. The liquid carrier in the concentrate is aqueous or non-aqueous, such as hydrocarbon oil or other organic liquid, and the liquid carrier is selected so that the solubility of the solid pesticide in the liquid carrier is low. Most solid pesticides have low solubility in water and can be formulated into aqueous or non-aqueous suspensions, where the liquid carrier is...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N57/20
CPCA01N25/04A01N57/20A01N2300/00
Inventor H·E·阿格巴杰D·H·卡特T·A·鲍尔斯S·K·霍金斯A·J·斯特恩S·朱
Owner MONSANTO TECH LLC
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