Dry, water-soluble powder, substituted heterocyclic acid or substituted phenol herbicidal compositions, and method of preparing same

• US 5,280,008 A
• Filed: 06/14/1993
• Issued: 01/18/1994
• Est. Priority Date: 08/16/1991
• Status: Expired due to Term

• Current Assignee: Pbi/Gordon Corporation
• Original Assignee: Pbi/Gordon Corporation
• Inventors: Cahoy, Roger P., Van Haften, John L.
• Primary Examiner(s): Raymond, Richard L.
• Assistant Examiner(s): CLARDY, S
• Application Number:
  US08/076,453
• Time in Patent Office: 218 Days
• Field of Search: 504/116, 504/130, 504/131, 504/141, 504/222, 504/244, 504/247, 504/254, 504/260, 504/310
• US Class Current: 504/367
• 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 25/08 containing solids as carriers or diluents
• CPC Class Codes: A01N 25/12 Powders or granules A01N25/26 takes precedence
• 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 37/44 containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
• CPC Class Codes: A01N 39/02 Aryloxy-carboxylic acids; Derivatives thereof
• CPC Class Codes: A01N 39/04 Aryloxy-acetic acids; Derivatives thereof

Abstract

Dry, water-soluble powder, substituted heterocyclic acid, substituted phenol herbicidal compositions, combinations thereof, or in combination with phenoxy and/or benzoic acid herbicides, are prepared by grinding and dry blending the herbicide in acid form with a dry, particulate solubilization medium selected from the group consisting of diammonium phosphate, dipotassium phosphate, disodium phosphate, trisodium phosphate or tripotassium phosphate. At least about 1 mole of the medium is provided for each mole of active herbicidal agent in the initially dry blended mixture. The dry blended mixture may be packaged in suitable containers such as paper bags, and added directly to a quantity of water to form a solubilized herbicidal formulation containing from about 0.1% to about 2-1/2% of the active herbicide and which is suitable for direct application to vegetation to be controlled.

Claims

1. A dry, water-soluble herbicide powder composition consisting essentially of:

a dry blended admixture of

a first quantity of dry, powder particles of a substantially solid herbicidal agent selected from the group consisting of a herbicidally active substituted heterocyclic acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted phenoxy acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted benzoic acid, a herbicidally active substituted heterocyclic acid combined with a herbicidally active substituted phenoxy acid and a herbicidally active substituted benzoic acid, a herbicidally active substituted phenol, a herbicidally active phenol combined with a herbicidally active substituted heterocyclic acid, a herbicidally active phenol combined with a herbicidally active substituted phenoxy acid, and a herbicidally active phenol combined with a herbicidally active substituted benzoic acid, each of which alone, or in combination with one another, are not readily soluble in water, and

a second quantity of dry, solid, powder particles selected from the group consisting of diammonium phosphate, dipotassium phosphate, disodium phosphate, trisodium phosphate, tripotassium phosphate, and mixtures thereof as a solubilization medium for the herbicidal agent,

said first and second quantities of the herbicidal agent and the solubilization medium being the predominate constituents of the composition,

there being at least about 1 mole of solubilization medium for each mole of herbicidal agent,

said herbicidal agent and the solubilization medium having been dry blended in powdered form without changing the physical state of the particles to retain the discrete particulate character of each of said first and second quantities of said particles, and in the absence of chemical reaction between said herbicidal agent and said solubilization medium to form a relatively uniform dry mixture thereof,

there being a sufficient quantity of the phosphate medium in the dry blended mixture in relationship to the quantity of herbicidal agent combined therewith such that the dry blended powder mixture will dissolve in water during preparation of a herbicidal solution therefrom that contains an adequate proportion of the herbicidal agent to provide from about 0.1 to about 2-1/2% by weight of the active herbicidal agent in the herbicidal solution.

2. A herbicide as set forth in claim 1 wherein said dry solubilization medium is diammonium phosphate.

3. A herbicide as set forth in claim 1 wherein said dry solubilization medium is dipotassium phosphate.

4. A herbicide as set forth in claim 1 wherein said dry solubilization medium is trisodium phosphate.

5. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,6-dichloropicolinic acid.

6. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,5,6-trichloro-2-pyridyloxyacetic acid.

7. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 4-amino-3,5,6-trichloropicolinic acid.

8. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,7-dichloro-8-quinolinecarboxylic acid.

9. A herbicide as set forth in claim 1 wherein solid, powder herbicide is 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide.

10. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,5-dibromo-4-hydroxybenzonitrile.

11. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,5-dibromo-4-hydroxybenzonitrile and 2-methyl-chlorophenoxyacetic acid.

12. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,5-diiodo-4-hydroxybenzonitrile.

13. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is 3,5-diiodo-4-hydroxybenzonitrile and 3,5-dibromo-4-hydroxybenzonitrile.

14. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is a herbicide as set forth in any one of claims 5, 6, 7, 8, 9, 10, 11, 12 or 13 and further including a substituted phenoxy acid herbicide.

15. A herbicide as set forth in claim 1 wherein said dry, solid, powder herbicide is a herbicide as set forth in any one of claims 5, 6, 7, 8, 9, 10, 11, 12 or 13 and further including a substituted benzoic acid herbicide.

16. A herbicide as set forth in claim 14 wherein the dry blended admixture includes a mixture of substituted phenoxy acid and substituted benzoic acid herbicides.

17. A method of preparing a dry, water-soluble, herbicide powder composition consisting essentially of the steps of:

providing a first quantity of dry, powder particles of a substantially solid herbicidal agent selected from the group consisting of a herbicidally active substituted heterocyclic acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted phenoxy acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted benzoic acid, a herbicidally active substituted heterocyclic acid combined with a herbicidally active substituted phenoxy acid and a herbicidally active substituted benzoic acid, and a herbicidally active substituted phenol, a herbicidally active phenol combined with a herbicidally active substituted heterocyclic acid, a herbicidally active phenol combined with a herbicidally active substituted phenoxy acid, and a herbicidally active phenol combined with a herbicidally active substituted benzoic acid, each of which alone, or in combination with one another, are not readily soluble in water,

providing a second quantity of dry, solid powder particles consisting essentially of a solubilization medium for the herbicidal agent and selected from the group consisting of diammonium phosphate, dipotassium phosphate, disodium phosphate, trisodium phosphate and tripotassium phosphate,

said first and second quantities of the herbicidal agent and the solubilization medium being the predominate constituents of the composition,

there being at least 1 mole of solubilization medium for each mole of herbicidal agent; and

dry blending the herbicidal agent and the solubilization medium in powdered form without changing the physical state of the particles to retain the discrete particulate character of each of said first and second quantities of said particles, and in the absence of chemical reaction between said herbicidal agent and said solubilization medium to produce a relatively uniform dry mixture thereof,

a sufficient quantity of the phosphate solubilization medium being provided in the dry blended mixture in relationship to the quantity of herbicidal agent combined therewith to cause the powdered dry blended mixture to substantially dissolve in water during preparation by the applicator of a herbicidal solution which contains an adequate proportion of the herbicidal agent to provide from about 0.1% to about 2-1/2% by weight of the active herbicidal agent in the herbicidal solution.

18. A method as set forth in claim 17 wherein a sufficient quantity of the phosphate medium is present in the dry blended mixture to provide at least about 1 to about 5 mols of the medium for each mol of active herbicidal agent in the dry blended mixture.

19. A method as set forth in claim 17 wherein is included the step of providing a mixture of said herbicidally active agents for dry blending with the phosphate medium.

20. A method as set forth in claim 17 wherein said dry solubilization medium is diammonium phosphate.

21. A method as set forth in claim 17 wherein said dry solubilization medium is dipotassium phosphate.

22. A method as set forth in claim 17 wherein said dry solubilization medium is trisodium phosphate.

23. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,6-dichloropicolinic acid.

24. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,5,6-trichloro-2-pyridyloxyacetic acid.

25. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 4-amino-3,5,6-trichloropicolinic acid.

26. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,7-dichloro-8-quinolinecarboxylic acid.

27. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide.

28. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,5-dibromo-4-hydroxybenzonitrile.

29. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,5-dibromo-4-hydroxybenzonitrile and 2-methyl-chlorophenoxyacetic acid.

30. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,5-diiodo-4-hydroxybenzonitrile.

31. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is 3,5-diiodo-4-hydroxybenzonitrile and 3,5-dibromo-4-hydroxybenzonitrile.

32. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is a herbicide as set forth in any one of claims 23, 24, 25, 26, 27, 28, 29, 30 or 31 and further including a substituted phenoxy acid herbicide.

33. A method as set forth in claim 17 wherein said dry, solid, powder herbicide is a herbicide as set forth in any one of claims 23, 24, 25, 26, 27, 28, 29, 30 or 31 and further including a substituted benzoic acid herbicide.

34. A method as set forth in claim 32 wherein the dry blended admixture includes a mixture of substituted phenoxy acid and substituted benzoic acid herbicides.

35. A method as set forth in claim 17 wherein is included the step of incorporating an anti-caking agent in the dry blended mixture.

36. A method of preparing a herbicide solution consisting essentially of the steps of:

adding to a volume of water, a dry powdered herbicidal composition containing

a first quantity of dry, powder particles of a substantially solid herbicidal agent selected from the group consisting of a herbicidally active substituted heterocyclic acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted phenoxy acid, a herbicidally active substituted heterocyclic acid combined with a solid herbicidally active substituted benzoic acid, a herbicidally active substituted heterocyclic acid combined with a herbicidally active substituted phenoxy acid and a herbicidally active substituted benzoic acid, a herbicidally active substituted phenol, a herbicidally active phenol combined with a herbicidally active substituted heterocyclic acid, a herbicidally active phenol combined with a herbicidally active substituted phenoxy acid, and a herbicidally active phenol combined with a herbicidally active substituted benzoic acid, each of which alone, or in combination with one another, are not readily soluble in water, and

a second quantity of dry, solid, powder particles of a selected from the group consisting of diammonium phosphate, dipotassium phosphate, disodium phosphate, trisodium phosphate, tripotassium phosphate, and mixtures thereof as a solubilization medium for the herbicidal agent,

said first and second quantities of the herbicidal agent and the solubilization medium being the predominate constituents of the composition,

there being at least about 1 mole of solubilization medium for each mole of herbicidal agent,

said herbicidal agent and the solubilization medium having been subjected to only dry blended in powdered form without changing the physical state of the particles to retain the discrete particulate character of each of said first and second quantities of said particles, and in the absence of chemical reaction between said herbicidal agent and said solubilization medium, to form a relatively uniform dry mixture thereof;

adding a sufficient quantity of the powdered dry blended admixture of the herbicidal agent and the phosphate solubilization medium to the volume of water to cause the powdered dry blended mixture dissolved in the water to provide from about 0.1% to about 2-1/2% by weight of the active herbicidal agent in the herbicidal solution; and

agitating the water containing the herbicidal agent and the solubilization medium for a time period sufficient to effect substantial dissolution of the agent and the medium in the volume of water.