Herbicidal composition with increased herbicidal efficacy

• US 9,801,369 B2
• Filed: 03/15/2013
• Issued: 10/31/2017
• Est. Priority Date: 10/05/2006
• Status: Active Grant

• Current Assignee: Suncor Energy Incorporated
• Original Assignee: Suncor Energy Incorporated
• Inventors: Fefer, Michael, Liu, Jun
• Primary Examiner(s): Wax, Robert A
• Assistant Examiner(s): NIELSEN, THOR B
• Application Number:
  US13/832,622
• Publication Number:
  US 20130303374A1
• Time in Patent Office: 1,691 Days
• Field of Search: None
• 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 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

Abstract

An herbicide composition available as a concentrate for dilution with water or a ready-to-use oil-in-water emulsion which has a significantly reduced amount of active ingredient of a broadleaf herbicide. The composition combines the reduced amount of herbicide in a mixture of oil and emulsifier.

Claims

1. A selective herbicide composition comprising:

an effective amount of an auxin mimic-type broadleaf herbicide in salt form, wherein the effective amount is from about 10% to about 50% of a prescribed label application rate;

wherein the herbicide comprises 2,4-dichlorophenoxyacetic acid in the form of a salt, 2-(2-methyl-4-chlorophenoxy)propionic acid in the form of a salt, and 3,6-dichloro-o-anisic acid in the form of a salt;

a paraffinic oil;

an emulsifier; and

water;

wherein;

the weight ratio of paraffinic oil to emulsifier is from about 95;

5 to about 50;

50;

the selective herbicide composition demonstrates herbicidal efficacy;

and when the herbicide, paraffinic oil, and emulsifier collectively comprise from about 10% to about 20% by weight of the composition, the composition is non-phytotoxic to turfgrass.

2. The composition of claim 1 wherein the ratio of oil to emulsifier in the oil-emulsifier mixture is from about 85:

15 wt % to about 90;

10 wt %.

3. The composition of claim 1 wherein the effective amount of active ingredients of the broadleaf herbicide to paraffinic oil and emulsifier is in a ratio of about 1:

50 to about 1;

750 by weight.

4. The composition of claim 1 wherein the paraffinic oil is a highly saturated oil.

5. The composition of claim 4 wherein the paraffinic oil has an aromatic content of less than about 10 wt %.

6. The composition of claim 4 wherein the paraffinic oil has an aromatic content of less than about 5 wt %.

7. The composition of claim 4 wherein the paraffinic oil has substantially no aromatic content.

8. The composition of claim 4 wherein the paraffinic oil is a synthetic isoparaffinic oil.

9. The composition of claim 1 wherein the emulsifier is an ethoxylated alcohol.

14. The composition of claim 1 wherein the emulsifier is an emulsifier blend comprising one or more ethoxylated alcohols and one or more glycerol mono-oleates, one or more glycerol di-oleates, or a combination thereof.

15. The composition of claim 14 wherein the emulsifier consists of (1) polyoxyethylene lauryl ether, C10 to C16 alcohol ethoxylates, and glycerol oleate or (2) ethoxylated alcohol.

18. The composition of claim 1, wherein the ratio of paraffinic oil to emulsifier is from about 85:

15 wt % to 50;

50 wt %.

10. An emulsion-forming broadleaf herbicide concentrate comprising:

an effective amount of an auxin mimic-type broadleaf herbicide in salt form, wherein the effective amount is from about 10% to about 50% of a prescribed label rate;

wherein the herbicide comprises 2,4-dichlorophenoxyacetic acid in the form of a salt, 2-(2-methyl-4-chlorophenoxy)propionic acid in the form of a salt, and 3,6-dichloro-o-anisic acid in the form of a salt;

a paraffinic oil; and

an emulsifier;

wherein;

the weight ratio of paraffinic oil to emulsifier is from about 95;

5 to about 50;

50; and

when the herbicide concentrate is diluted in water sufficient to dilute the combined herbicide, paraffinic oil, and emulsifier to from about 10 wt % to about 20 wt % to form an herbicidal composition, the herbicidal composition demonstrates herbicidal efficacy and is non-phytotoxic to turfgrass.

11. The concentrate of claim 10 wherein the ratio of paraffinic oil to emulsifier in the oil-emulsifier mixture is from about 85:

15 wt % to about 90;

10 wt %.

12. The concentrate of claim 10 wherein the paraffinic oil is a highly saturated oil having a carbon number distribution of from about C₁₆ to about C₃₅ and an aromatic content of less than about 10 wt %.

13. The concentrate of claim 12 wherein the paraffinic oil has an aromatic content of less than about 5 wt %.

16. The concentrate of claim 10 wherein the emulsifier is an emulsifier blend comprising one or more ethoxylated alcohols and one or more glycerol mono-oleates, one or more glycerol di-oleates, or a combination thereof.

17. The concentrate of claim 16 wherein the emulsifier consists of (1) polyoxyethylene lauryl ether, C10 to C16 alcohol ethoxylates, and glycerol oleate or (2) ethoxylated alcohol.