Microemulsion coformulation of graminicide and water-soluble herbicide

A herbicide and water-soluble technology, applied in the field of microemulsion mixtures of gramineous herbicides and water-soluble herbicides, can solve problems such as increasing chemical decomposition

Inactive Publication Date: 2002-09-11
MONSANTO TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, surfactants tend to facilitate the movement of gramineous herbicides across the broad interface between the oil and water phases, thereby increasing the potential for chemical breakdown

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0077] A method of preparing the compositions of the invention involves mixing the ingredients in a suitable vessel. The presently preferred order of addition of ingredients is as follows: First, all required surfactants are added to the concentrated aqueous solution of the water-soluble herbicide, along with acid or base, if necessary, to adjust the pH, forming the first mixture. The oil soluble grass herbicide is added to the organic solvent with stirring to form a second mixture. The second mixture is then added to the first mixture with stirring to form the final composition.

[0078] An alternative sequence of addition is as follows: A concentrated aqueous solution of the water-soluble herbicide is prepared and the other optional water-soluble ingredients (including pH-adjusting acids or bases) are added together with stirring to form a first mixture. The oil soluble grass herbicide is added to the organic solvent with stirring to form a second mixture. The second mixtu...

Embodiment 1

[0095] A microemulsion composition was prepared comprising:

[0096] Glyphosate IPA salt, 61.6% aqueous solution (MON 0139) 68.57% 1

[0097] Ammonium chloride 0.75%

[0098] 2N hydrochloric acid 11.10%

[0099] Solvesso TM Aromatic 150 8.20%

[0100] Quizalofop-P-ethyl 1.43%

[0101] Polyoxyethylene (5) tallow amine 3.11%

[0102] Polyoxyethylene (2) Cocamine 3.09%

[0103] Polyoxyethylene (8) lauryl ether 3.04%

[0104] Water 0.68% 1 42.24% Glyphosate IPA Salt; 31.33% Glyphosate Acid Equivalent (a.e.)

[0105] Ammonium chloride was dissolved in 2N hydrochloric acid, the resulting solution was mixed with MON 0139, and water was added to form the first mixture. Quizalofop-ethyl was dissolved in the Aromatic 150 to form a second solution which was then added to the first mixture with stirring. Surfactant was added last and the whole composition was stirred for 30 minutes.

[0106] The composition is a clear amber microemulsion that is physically stable at -10°C, r...

Embodiment 2

[0108] A microemulsion composition was prepared comprising:

[0109] Glyphosate IPA salt, 61.6% aqueous solution (MON 0139) 69.06% 1

[0110] Ammonium Chloride 1.75%

[0111] Solvesso TM TM Aromatic 100 8.29%

[0112] Quizalofop-ethyl 1.46%

[0113] Polyoxyethylene (5) tallow amine 3.07%

[0114] Polyoxyethylene(2) Cocylamine 2.97%

[0115] Polyoxyethylene (6) lauryl ether 2.24%

[0116] Water 11.15% 1 42.54% Glyphosate IPA Salt; 31.55% Glyphosate Acid Equivalent (a.e.)

[0117] Ammonium chloride is dissolved in water and the resulting solution is mixed with MON 0139 to form the first mixture. Quizalofop-ethyl was dissolved in Aromatic 100 to form a second solution, which was then added to the first mixture with stirring. Surfactant was added last and the whole composition was stirred for 30 minutes.

[0118] The composition is a clear amber microemulsion that is physically stable at -10°C, room temperature (approximately 22°C) and 50°C. The microemulsion shows go...

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Abstract

A liquid concentrate herbicidal microemulsion composition is provided comprising(i) water;(ii) a water-soluble herbicide;(iii) an oil-soluble cyclohexenone or aryloxyphenoxypropionate graminicide in a weight ratio to the water-soluble herbicide of about 1:50 to about 1:1;(iv) a substantially water-immiscible organic solvent selected such that the graminicide has an organic solvent / water partition coefficient, expressed as a logarithm, of about 4 or greater, in a weight ratio to the graminicide of about 3:1 to about 30:1;(v) an emulsifying system comprising one or more surfactants each having a tertiary amine functional group, in an amount not exceeding about 10% by weight but sufficient to provide acceptable physical stability of the microemulsion;(vi) zero to a stabilizing amount of one or more water-soluble chlorides selected from hydrochloric acid, alkali metal chlorides, ammonium chloride, low molecular weight organic ammonium chlorides and quaternary ammonium chloride surfactants; and(vii) a dispersing system comprising one or more nonionic surfactants, in a total amount not exceeding about 5% by weight but sufficient to provide acceptable dispersion of the microemulsion upon dilution thereof in a suitable volume of water for application to plants and not sufficient to destabilize the microemulsion.Compositions of the invention wherein the water-soluble herbicide is a salt of glyphosate are particularly useful for controlling unwanted glyphosate-tolerant plants of the grass family in glyphosate-tolerant broadleaf crops.

Description

field of invention [0001] The present invention relates to agriculturally useful compositions comprising at least two herbicidal active ingredients, one of which is a selective gramineous herbicide of the cyclohexenone or aryloxyphenoxypropionate class and the other One is a water-soluble herbicide. In particular, the present invention relates to stable liquid concentrate compositions of these active ingredients. Background of the invention [0002] In agricultural and related endeavors, it is desirable to treat unwanted plants, especially weeds, with chemical herbicides as a means of killing or controlling such plants or their locus. Often such treatments have to be carried out in the presence of plants, especially crops, without causing damage to the crops to unacceptable levels. For this reason, selective herbicides, ie, compounds which are herbicidally active against certain types of weeds while acceptably not harmful to specific crops when weed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/30A01N33/12A01N35/10A01N37/02A01N43/60A01N57/20
CPCA01N25/04A01N57/20A01N43/60A01N2300/00
Inventor G·A·吉莫
Owner MONSANTO TECH LLC
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