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US 2003/0125209 A1Published application
High-strength low-viscosity agricultural formulations
AssigneeDow AgroSciences LLC
InventorHolger Tank
Life of this patent
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Abstract
The present invention provides a concentrated herbicide composition containing a glyphosate isopropylammonium salt and a polyoxyalkylene alkylamine surfactant. The concentrated herbicide composition can be formulated to exhibit decreased viscosity by reducing the amount of isopropyl amine used to prepare the glyphosate salt while maintaining the high concentration of the glyphosate salt.
Claims10
A herbicide concentrate comprising:
- glyphosate isopropylammonium salt dissolved in an aqueous solution at a concentration of greater than about 400 grams acid equivalent per liter, said glyphosate isopropylammonium salt prepared by combining glyphosate acid and isopropyl amine at a molar ratio of between about 1:1 and about 1:1.10;
- and
- a polyoxyalkylene alkylamine.
A method of reducing the viscosity of a concentrated herbicide composition containing a glyphosate salt and an polyoxyalkylene alkylamine surfactant, said method comprising:
- combining glyphosate acid in an aqueous slurry with between about 1 and about 1.10 equivalents of an isopropyl amine, based upon the molar equivalents of the glyphosate acid to provide a glyphosate isopropylammonium salt concentrate in the form of a clear, homogeneous aqueous solution;
- admixing the glyphosate isopropylammonium salt aqueous solution with the polyoxyalkylene alkylamine surfactant.
Dependencies are inferred from the claim text.