Cationic surfactant based adjuvant systems for some herbicides that increase pH, herbicide solubility and performance

• US 20090325805A1
• Filed: 11/26/2004
• Published: 12/31/2009
• Est. Priority Date: 11/26/2004
• Status: Active Grant

• Current Assignee: Agquam LLC
• Original Assignee: Agquam LLC
• Inventors: Parrish, Scott K.
• Granted Patent: US 8,932,988 B2
• Time in Patent Office: Days
• US Class Current: 504/212
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 43/90 having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
• CPC Class Codes: A01N 47/36 containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
• CPC Class Codes: A01N 47/38 containing the group >N—CO—N< where at least one nitrogen atom is part of a heterocyclic ring; Thio analogues thereof

Abstract

A method for increasing the performance of sulfonylurea and sulfonamide herbicides by using blends of cat-ionic surfactants and basic pH adjustors as adjuvants.

Claims

1. An aqueous herbicidal spray composition comprising an adjuvant blend comprising a cationic surfactant and a basic pH adjustor in an amount effective for providing an alkaline pH of above 9 to about 10.5 when formulated in the aqueous spray composition;

and an effective amount of a sulfonylurea or sulfonamide herbicide.

2. The composition according to claim 1 where the alkaline pH adjustor is selected from the group consisting of ammonium hydroxide, potassium hydroxide, sodium hydroxide monoethanolamine, diethanolamine, triethanolamine, and mixtures thereof.

3. The composition according to claim 1 where the cationic surfactant is selected from the group consisting of tallow amine, tallow diamine, coco amines, ether amines, and mixtures thereof.

4. The composition according to claim 1 wherein the adjuvant blend further comprises a nonionic surfactant selected from the group consisting of linear alcohol ethoxylates, secondary alcohol ethoxylates, block copolymers of ethylene and propylene oxide, and mixtures thereof.

5. The composition according to claim 1 wherein the adjuvant blend further comprises modified vegetable oils selected from the group consisting of methylated, ethylated and butylated seed oils and mixtures thereof.

6. The composition according to claim 1 wherein the adjuvant blend further comprises vegetable oils and mixtures thereof.

7. The composition according to claim 1 wherein the adjuvant blend further comprises block copolymers wherein the block copolymers are selected from the group consisting of copolymers of propylene oxide and ethylene oxide.

17. The composition of claim 1 wherein said herbicide is a sulfonylurea.

18. The composition of claim 1 wherein said herbicide is selected from the group consisting of sulfosulfuron, mesosulfuron-methyl, nicosulfuron, and propoxycarbazone.

8. A method of controlling weeds which comprises applying a post-emergence herbicidal spray composition to weeds and/or other undesired vegetation, the herbicidal spray composition comprising;

an adjuvant blend comprising cationic surfactant;

a basic pH adjustor in an amount effective for providing an alkaline pH of above a pH 9 to about 10.5 when formulated in a final spray composition;

an effective amount of a postemergence herbicide; and

additional water to make up the final spray solution.

9. A method for controlling weeds according to claim 8 wherein the postemergence herbicides include but are not limited to sulfonylurea herbicides such as sulfuron, triasulfuron, mesosulfuron-methyl, chlorsulfuron, halosulfuron, metsulfuron, thifensulfuron, tribenuron, bensulfuron, primisulfuron and nicosulfuron.

10. A method for controlling weeds according to claim 8 wherein the postemergence herbicides include but are not limited to sulfonamide herbicides such as propoxycarbazone-sodium, propoxycarbazone-sodium and cloransulam-methyl.

11. A method for controlling weeds according to claim 8 where the alkaline pH adjustors includes, but are not limited to:

ammonium hydroxide, potassium hydroxide, sodium hydroxide monoethanolamine, diethanolamine, triethanolamine, and a mixtures thereof in sufficient amount to provide a pH of from about 9 to about 10.5 in the final diluted aqueous composition.

12. A method for controlling weeds according to claim 8 where the cationic surfactant includes, but are not limited to:

tallow amine, tallow diamine, coco amines, ether amines and mixture thereof.

13. A method for controlling weeds according to claim 8 which contains an alkaline pH adjustor a cationic surfactant and nonionic surfactant is selected from the group consisting of linear alcohol ethoxylates, secondary alcohol ethoxylates, block copolymers of ethylene and propylene oxide, and mixtures thereof.

14. A method for controlling weeds according to claim 8 which contains an alkaline pH adjustor a cationic surfactant and modified vegetable oils selected from the group consisting of methylated, ethylated and butylated seed oils and mixtures thereof.

15. A method for controlling weeds according to claim 8 which contains an alkaline pH adjustor a cationic surfactant and vegetable oils and mixtures thereof.

16. A method for controlling weeds according to claim 8 which contains an alkaline pH adjustor a cationic surfactant and a block copolymers wherein the block copolymers are selected from the group consisting of copolymers of propylene oxide and ethylene oxide.