COMPOSITIONS AND METHODS FOR IMPROVING THE COMPATIBILITY OF WATER SOLUBLE HERBICIDE SALTS

• US 20120053056A1
• Filed: 08/23/2011
• Published: 03/01/2012
• Est. Priority Date: 08/24/2010
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Liu, Lei, Zhang, Hong, Tank, Holger, Li, Mei, Qin, Kuide, Ouse, David G., Wilson, Stephen L., Kennedy, Alex, Downer, Brandon M.
• Granted Patent: US 8,486,862 B2
• Time in Patent Office: Days
• US Class Current: 504/206
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/02 containing liquids as carriers, diluents or solvents
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 39/04 Aryloxy-acetic acids; Derivatives thereof
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals

Abstract

The compatibility of aqueous herbicide solutions containing water soluble salts of 2,4-D and glyphosate in the presence of inorganic cations is improved by the addition of polyethylenimine or polyvinylamine crystallization inhibitors.

Claims

1. A method of improving the compatibility of aqueous herbicide solutions containing a water soluble salt of 2,4-D and a water soluble salt of glyphosate, wherein such solutions contain one or more inorganic cations selected from the group consisting of NH₄⁺, Na⁺, K⁺, Ca²⁺, Mg²⁺, Fe²⁺, Fe³⁺, Cu²⁺, Mn²⁺ and Zn²⁺, which comprises adding to the aqueous herbicide solution one or more polyethylenimine or polyvinylamine crystallization inhibitors.

2. An aqueous herbicide solution of improved compatibility containing one or more inorganic cations selected from the group consisting of NH₄⁺, Na⁺, K⁺, Ca²⁺, Mg²⁺, Fe²⁺, Fe³⁺, Cu²⁺, Mn²⁺ and Zn²⁺ comprising a water soluble salt of 2,4-D or glyphosate, or a pre-mix containing water soluble salts of both 2,4-D and glyphosate, and one or more polyethylenimine or polyvinylamine crystallization inhibitor.

3. The aqueous herbicide solution of claim 2 which is a concentrate.

4. The aqueous herbicide concentrate of claim 3 in which the polyethylenimine or polyvinylamine crystallization inhibitor is from about 0.05 to about 10 weight percent of the concentrate.

5. The aqueous herbicide solution of claim 2 which is a spray solution.

6. The aqueous herbicide spray solution of claim 5 in which the polyethylenimine or polyvinylamine crystal inhibitor is from about 0.001 to about 5 weight percent of the spray isolation.

7. A dry herbicide composition comprising one or more polyethylenimine or polyvinylamine crystallization inhibitors, a water soluble salt of 2,4-D or glyphosate, or a mixture of water soluble salts of 2,4-D and glyphosate.

8. The dry herbicide composition of claim 7 in which the polyethylenimine or polyvinylamine crystallization inhibitor is from about 0.05 to about 10 weight percent of the composition.