Liquid concentrated herbicidal microemulsion compositions comprising glyphosate and either oxyfluorfen or acifluorfen

• US 5,565,409 A
• Filed: 03/28/1994
• Issued: 10/15/1996
• Est. Priority Date: 04/02/1993
• Status: Expired due to Fees

• Current Assignee: Monsanto Technology LLC (Bayer AG)
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Khan, Shuaib A., Mitchell, Robert W., Sato, Tatsuo
• Primary Examiner(s): CLARDY, S
• Application Number:
  US08/218,778
• Time in Patent Office: 932 Days
• Field of Search: 504/127
• US Class Current: 504/127
• 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 57/20 containing acyclic or cycloaliphatic radicals

Abstract

There is disclosed a liquid concentrate herbicidal composition comprising:

at least 15% by weight based on the total composition of N-phosphonomethylglycine or of a salt thereof or of a mixture of salts thereof (calculated as acid equivalent);

a water-insoluble diphenyl ether type herbicide (oxyfluorfen or acifluorfen) in the ratio by weight of N-phosphonomethylglycine a.e. to diphenyl ether type herbicide of from about 10:1 to about 100:1;

about 5 to about 25% by weight of a surface active component comprising a mixture of an alkoxylated fatty amine with a surfactant chemically different from the alkoxylated fatty amine;

0 to about 10% by weight of solvent, the surface active component optionally with admixture of the solvent being capable of dissolving the diphenyl ether herbicide;

about 1 to about 25% by weight of a compatibility agent; and

water if necessary to total 100%.

Claims

1. A stable aqueous-based liquid concentrate herbicidal composition having a separate phase in the form of a microemulsion or micellar solution comprising:

a) at least 15% of a water soluble herbicidal salt of N-phosphonomethylglycine a.e. dissolved in said liquid;

b) a water-insoluble diphenylether herbicide selected from the group consisting of oxyfluorfen and acifluorfen dissolved in an inert organic solvent and suspended in the aqueous liquid, the ratio by weight of N-phosphonomethylglycine herbicide a.e. to the diphenylether herbicide being from abut 10;

1 to about 100;

1;

c) about 5 to about 25% by weight of a surfactant mixture of (i) an alkoxylated fatty amine surfactant and (ii) an alkoxylated quaternary ammonium salt surfactant;

d) about 1 to about 25% by weight of a compatibility agent selected from the group consisting of dipropylene glycol and diethylene glycol; and

e) the remainder water.

2. The composition of claim 1 wherein at least 20% by weight is a herbicidal salt of glyphosate.

3. The composition of claim 2 wherein the herbicidal salt is the isopropylamine salt of N-phosphonomethylglycine.

4. The composition of claim 3 wherein the diphenylether herbicide is oxyfluorfen.

5. The composition of claim 3 wherein the diphenylether herbicide is acifluorfen.

6. The composition of claim 3 wherein the compatibility agent is dipropylene glycol.

7. The composition of claim 3 wherein the compatibility agent is diethylene glycol.

8. The composition of claim 3 wherein the solvent is cyclohexanone.

9. The composition of claim 3 wherein the alkoxylated fatty amine surfactant is ethoxylated (2EO) cocoamine.

10. The composition of claim 3 wherein the quaternary ammonium salt surfactant is cocoalkyldimethylbenzyl ammonium chloride.

11. A method of killing or controlling unwanted vegetation by applying to the plants to be killed or controlled an effective amount of the composition of claim 1.