Herbicide composition comprising herbicide compound in acid form and acidifying agent

• US 8,759,256 B2
• Filed: 02/05/2010
• Issued: 06/24/2014
• Est. Priority Date: 09/26/2001
• Status: Expired due to Fees

• Current Assignee: Platte Chemical Company
• Original Assignee: Platte Chemical Company
• Inventors: Parrish, Scott K., Beardmore, Richard A., Herold, Anthony E.
• Primary Examiner(s): Pryor, Alton
• Application Number:
  US12/701,279
• Publication Number:
  US 20100184599A1
• Time in Patent Office: 1,600 Days
• US Class Current: 504/324
• 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 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 37/38 having at least one oxygen or sulfur atom attached to an aromatic ring system
• CPC Class Codes: A01N 37/40 having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
• CPC Class Codes: A01N 39/02 Aryloxy-carboxylic acids; Derivatives thereof
• CPC Class Codes: A01N 39/04 Aryloxy-acetic acids; Derivatives thereof
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 43/50 1,3-Diazoles; Hydrogenated 1,3-diazoles
• CPC Class Codes: A01N 43/60 1,4-Diazines; Hydrogenated 1,4-diazines
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals
• CPC Class Codes: A01N 59/00 Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
• CPC Class Codes: A01N 59/02 Sulfur; Selenium; Tellurium; Compounds thereof
• CPC Class Codes: A01N 59/20 Copper
• CPC Class Codes: A01N 59/26 Phosphorus; Compounds thereof
• CPC Class Codes: A01N 61/00 Biocides, pest repellants or attractants, or plant growth regulators containing substances of unknown or undetermined composition, e.g. substances characterised only by the mode of action

Abstract

Described are herbicide compositions and methods for their preparation and use, in particular, herbicide compositions and methods relating to herbicide compositions containing herbicide compounds in acid form, and further including an acidifying agent.

Claims

1. A method of controlling plant growth, the method comprising:

preparing a herbicide composition, by;

providing a herbicide concentrate composition comprising a herbicide compound in its charge neutral acid form; and

combining the herbicide concentrate composition with acidifying agent and water to form a herbicide application composition having a pH below the pKa of the herbicide compound in acid form, wherein the pKa of the herbicide compound is below 6; and

applying the herbicide application composition to a plant to control plant growth by the herbicide compound, wherein the herbicide compound damages and penetrates the plant surface and wherein the herbicide compound is dicamba acid (3,6-dichloro-O-anisic acid).

2. The method of claim 1 comprising:

providing the herbicide concentrate composition,

adding acidifying agent to the herbicide concentrate composition, and

adding water to the herbicide concentrate composition.

3. The method of claim 2 wherein the herbicide concentrate composition is selected from the group consisting of:

a microemulsion-forming concentrate, a microemulsion, and a suspension concentrate.

4. The method of claim 1 comprising combining the herbicide concentrate composition with water and acidifying agent in a spray tank to form the herbicide application composition.

5. The method of claim 1 wherein the herbicide concentrate composition is selected from the group consisting of:

a microemulsion-forming concentrate, a microemulsion, and a suspension concentrate.

6. The method of claim 1 wherein the pKa of the herbicide compound is below 5.

7. The method of claim 1 wherein the acidifying agent is sulfuric acid.

8. The method of claim 1 wherein the acidifying agent is selected from the group consisting of:

hydrochloric acid, nitric acid, acetic acid, phosphoric acid, polyphosphoric acid, perchloric acid, and combinations thereof, and the herbicide composition does not include sulfuric acid.

9. The method of claim 1 wherein the acidifying agent is selected from the group consisting of:

sulfuric acid, hydrochloric acid, nitric acid, acetic acid, phosphoric acid, perchloric acid, polyphosphoric acid, and combinations thereof.

10. The method of claim 1 wherein the acidifying agent is selected from the group consisting of:

sulfuric acid, hydrochloric acid, nitric acid, acetic acid, phosphoric acid, perchloric acid, and polyphosphoric acid, and the composition does not include a sulfuric acid adduct of the formula;

11. The method of claim 1 wherein the herbicide application composition does not include glyphosate acid.

12. The method of claim 1 wherein the herbicide concentrate composition contains essentially no organic solvent.

13. The method of claim 1 wherein the step of applying, the herbicide application composition is applied to control the growth of bushes, scrub brush, vines, or weeds.