IP Library Granted Patent US 6,946,426
Granted Patent B2
US 6,946,426 · App. 10/221,759 · Granted Sep 20, 2005

Process to prepare aqueous formulations

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,946,426
App. No.
10/221,759
Granted
Sep 20, 2005
Kind
B2
Abstract

Provided is a method of formulating hydrophobic pesticides comprising emulsifying an aqueous phase and a water-immiscible phase to form a formulation; wherein the aqueous phase is comprised of water and optionally a freeze/thaw agent, one or more emulsifiers, or combinations thereof, and the water-immiscible phase comprises the hydrophobic pesticide and one or more emulsifiers.

Claims (20)

1. A process for preparing a stable, aqueous formulation of a hydrophobic pesticide comprising emulsifying an aqueous phase and a water-immiscible phase sufficient for the homogeneous dispersal of the pesticide throughout the formulation:

a) wherein the water-immiscible phase comprises the hydrophobic pesticide and an alkyd-polyethylene glycol resin; and

b) wherein the aqueous phase comprises a polyalkylene glycol ether emulsifier.

2. The process of claim 1 , wherein the pesticide is selected from the group consisting of carfentrazone-ethyl, sulfentrazone, clomazone, permethrin, zetacypermethrin, and bifenthrin.

3. The process of claim 2 , wherein the pesticide is carfentrazone-ethyl.

4. The process of claim 1 , wherein the aqueous phase comprises a freeze/thaw agent selected from the group consisting of monoethlyene glycol, propylene glycol, glycerol, urea, and inorganic salts.

5. The process of claim 1 , wherein the water-immiscible phase further comprises a hydrocarbon solvent selected from the group consisting of an alkylated naphthalene aromatic, an alkylated biphenyl, a hydrogenated aliphate, an isoparaffin, a xylene range aromatic alkyl acetate, a fatty acid, an ester, a mineral oil, a vegetable oil, and an olefin.

6. The process of claim 5 , wherein the hydrocarbon solvent is alkylated naphthalene aromatic.

7. The process of claim 1 , wherein the emulsification comprises stirring the aqueous phase and the water-immiscible phase at a temperature in the range of about 20° C. to about 80° C. for a period of about three minutes to about 24 hours.

8. The process of claim 7 , wherein the emulsification comprises stirring the aqueous phase and the water-immiscible phase at a temperature in the range of about 20° C. to about 70° C. for a period of about five minutes to about three hours.

9. A stable, aqueous pesticidal formulation comprising

a) a pesticidally effective amount of a hydrophobic pesticide;

b) a water-immiscible phase comprising the hydrophobic pesticide and an alkyd-polyethylene glycol resin; and

c) an aqueous phase comprising a polyalkylene glycol ether emulsifier.

10. The stable, aqueous pesticidal formulation of claim 9 , wherein the pesticide is selected from the group consisting of carfentrazone-ethyl, sulfentrazone, clomazone, permethrin, zetacypermethrin, and bifenthrin.

11. The stable, aqueous pesticidal formulation of claim 10 , wherein the pesticide is carfentrazone-ethyl.

12. The stable, aqueous pesticidal formulation of claim 9 , further comprising a pesticidally effective amount of one or more additional pesticides selected from the group consisting of glyphosate, (2,4-dichlorophenoxy)acetic acid, (4-chloro-2-methylphenoxy)acetic acid, (RS)-2-(4-chloro-o-tolyloxy)propionic acid, isoproturon, imazapyr, imazamethabenz, imazethapyr, imazaquin, acifluorfen, bifenox, fomasafen, ioxynil, bromoxynil, chlorimuron, chlorsulfuron, bensulfuron, pyrazosulfuron, thifensulfuron, triasulfuron, fenoxaprop, fluazifop, quizalofop, diclofop, bentazone, butachlor, dicamba, and fluroxypyr.

13. The stable aqueous pesticidal formulation of claim 9 , wherein the aqueous phase comprises a freeze/thaw agent selected from the group consisting of monoethlyene glycol, propylene glycol, glycerol, urea, and inorganic salts.

14. The stable, aqueous pesticidal formulation of claim 9 , wherein the water-immiscible phase further comprises a hydrocarbon solvent selected from the group consisting of an alkylated naphthalene aromatic, an alkylated biphenyl, a hydrogenated aliphate, an isoparaffin, a xylene range aromatic alkyl acetate, a fatty acid, an ester, a mineral oil, a vegetable oil, and an olefin.

15. The stable, aqueous pesticidal formulation of claim 14 , wherein the hydrocarbon solvent is alkylated naphthalene aromatic.

Assignments (3)
RELEASE OF PATENT SECURITY INTEREST Recorded Mar 21, 2006
From: CITICORP USA, INC. (AS ADMINISTRATIVE AGENT)
To: FMC CORPORATION
Reel/Frame 017336/0374 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 10, 2003
From: MARTIN, TIMOTHY M.; LAVIN, MARYELLEN
To: FMC CORPORATION
Reel/Frame 013741/0565 →
SECURITY AGREEMENT Recorded Nov 19, 2002
From: FMC CORPORATION; INTERMOUNTAIN RESEARCH AND DEVELOPMENT CORPROATION
To: CITICORP USA, INC. (AS ADMINISTRATIVE AGENT)
Reel/Frame 013525/0574 →