STABILIZED AGRICULTURAL OIL DISPERSIONS

• US 20110275516A1
• Filed: 04/26/2011
• Published: 11/10/2011
• Est. Priority Date: 04/26/2010
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Qin, Kuide, Wu, Dan, Li, Mei, Keeney, Franklin N.
• Granted Patent: US 8,298,990 B2
• Time in Patent Office: Days
• US Class Current: 504/105
• 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 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/08 containing solids as carriers or diluents
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 43/90 having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system

Abstract

Agrochemical oil dispersions are stabilized to particle sedimentation by use of a combination of a clay or silica type rheology modifier and a polymer or oligomer capable of hydrogen bonding.

Claims

1. An oil dispersion of improved stability consisting essentially of:

a) an organic solvent comprising, with respect to the total composition, from about 200 g/L to about 999 g/L;

b) a polymer or oligomer capable of hydrogen bonding comprising, with respect to the total composition, from about 1 g/L to about 200 g/L;

c) a dispersed active ingredient comprising, with respect to the total composition, from about 1 g/L to about 700 g/L;

d) a clay or silica type rheology modifier comprising, with respect to the total composition, from about 1 g/L to about 200 g/L; and

e) at least one surfactant comprising, with respect to the total composition, from about 1 g/L to about 600 g/L.

2. The composition of claim 1 wherein the organic solvent comprises at least 70 percent by weight of a water immiscible, oprotic organic chemical and no more than 30 percent by weight of a polar aprotic organic chemical.

3. The composition of claim 1 wherein the polymer or oligomer capable of hydrogen bonding comprises at least one of a polyethylene glycol or polypropylene glycol.

4. The composition of claim 1 wherein the dispersed active ingredient comprises at least one herbicide selected from the classes of sulfonamides, sulfonylureas, arylpyridine carboxylic acids, arylpyrimidine carboxylic acids, hydroxybenzonitriles, anilides, imidazolinones, carbazones and derivatives thereof.

5. The composition of claim 4 wherein the dispersed herbicide is at least one of triasulfuron, tribenuron, metasulfuron, thifensulfuron, flupyrsulfuron, iodosulfuron, rimsulfuron, nicosulfuron, cinosulfuron, bensulfuron, trifloxysulfuron, foramsulphuron, mesosulphuron, sulphosulphuron, tritosulphuron, flumetsulam, metosulam, chloransulam, florasulam, diclosulam, penoxsulam, pyroxsulam, diflufenican, imazethabenz, imazethapyr, imazaquin, imazamox, flucarbazone, propoxycarbazone, amicarbazone, and compounds of the following generic structures and their derivatives,

6. The composition of claim 1 further comprising at least one of an additional insecticide, herbicide, fungicide or herbicide safener either dispersed or dissolved in the organic solvent.

7. The composition of claim 6 wherein the additional herbicide is fluoroxypyr-meptyl.

8. The composition of claim 6 wherein the additional herbicide is an arylpyridine carboxylic acid or ester of the formula

9. The composition of claim 8 wherein the arylpyridine carboxylic acid or ester has the formula

10. The composition of claim 6 wherein the herbicide safener is cloquintocet-mexyl.

11. The composition of claim 1 further comprising at least one of an antifoam agent, an adjuvant, a stabilizer, a fragrant, a sequestering agent, a neutralizing agent, a buffer, a corrosion inhibitor, a dye, an odorant and other commonly used inert ingredients.