Herbicide preparation, a process for producing it and an activating additive for application therewith

• US 6,180,566 B1
• Filed: 02/27/1998
• Issued: 01/30/2001
• Est. Priority Date: 03/09/1993
• Status: Expired due to Fees

• Current Assignee: KVK Agro A/S
• Original Assignee: KVK Agro A/S
• Inventors: Nielsen, Erik, Oxbøl, Arne
• Primary Examiner(s): CLARDY, S
• Application Number:
  US09/031,730
• Time in Patent Office: 1,068 Days
• Field of Search: 504/206, 504/363
• US Class Current: 504/206
• 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 25/30 characterised by the surfactants
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals

Abstract

Stable, concentrated herbicide preparation comprising at least one herbicide with at least one amino group, at least one carboxylic acid group and at least one phosphor containing acid group suspended in finegrained form in a liquid phase, and at least 5% a by weight of a dissolved electrolyte; a process for producing said herbicide preparation and an activating additive (adjuvant) for combination with said herbicide preparation. Preferred suspensions comprise the herbicides glyphosate and glufosinate and the electrolyte ammonium sulphate, acting synergistically. It has not hitherto been possible to incorporate high concentrations of synergistic electrolytes in liquid concentrates of said herbicides.

Claims

1. A concentrated herbicide suspension composition comprising:

5-58% by weight of a t least one herbicide, said herbicide being in particulate form suspended in a liquid aqueous phase and comprising at least one amino group, at least one carboxylic acid group and at least one phosphor containing acid group, and

at least 5% by weight of an electrolyte, which is dissolved in the liquid, aqueous phase and which is not a surfactant, and

1-5% by weight of one or more surfactants being emulsified, suspended and/or dissolved in the liquid, aqueous electrolyte solution.

2. A composition according to claim 1, having a water content of not more than 65% by weight.

3. A composition according to claim 1, wherein the liquid, aqueous phase is continuous as regards water, contains water miscible organic solvent, and the water content is at least 52% by weight of the total amount of solvent in the liquid phase.

4. A composition according to claim 3, wherein the water content is at least 60% by weight of the total amount of solvent in the liquid phase.

5. A composition according to claim 1, wherein the herbicide is glyphosate, glufosinate, bilanafos and/or glyphosine.

6. A composition according to claim 1, wherein the herbicide is in its non-neutralized form, or is completely or partly converted into its acid or base neutralized salt.

7. A composition according to claim 1, wherein the herbicide is glyphosate, glufosinate, bilanafos and/or glyphosine in its free, non-neutralized form or completely or partly converted into its respective ammonium salt by reaction with ammonia.

8. A composition according to claim 1, wherein the herbicide comprises 10-51% by weight.

9. A composition according to claim 1, wherein the electrolyte is selected from among ammonium salts.

10. A composition according to claim 1, wherein the electrolyte is a member selected from the group consisting of a sulphate, a chloride, a phosphate, a phosphite, a nitrate, a nitrite, a rhodanide, a sulfamate, a sulfite, a dithionite and a thiosulphate.

11. A composition according to claim 1, wherein the amount of dissolved electrolyte is 5-60% by weight.

12. A composition according to claim 1, further comprising 0.1-18% by weight of one or more viscosity regulating compounds.

13. A composition according to claim 12, wherein each viscosity regulating compound has a particle size of up to 5 μ

m and is a member selected from the group consisting of a naturally occurring clay, a synthetic clay and a silicate.

14. A composition according to claim 12, wherein the synthetic clay and silicate are selected from the group consisting of a naturally occurring silicium dioxide, a calcium silicate, a magnesium silicate, a magnesium aluminum silicate and an aluminum silicate.

15. A composition according to claim 1, wherein the herbicide has an average particle size of up to 72 μ

m.

16. A composition according to claim 1, wherein the herbicide has an average particle size of up to 48 μ

m.

17. A composition according to claim 1, wherein the herbicide has an average particle size of 0.5-29 μ

m.

18. A composition according to claim 1, having 3 to 38% by weight of surfactant.

19. A composition according to claim 1, comprising at least one surfactant selected from the group consisting of a non-ionic surfactant.

20. A composition according to claim 19, wherein the non-ionic surfactant is ethoxylated, propoxylated or co-ethoxylated/-propoxylated.

21. A composition according to claim 19, wherein the non-ionic surfactant is a member selected from the group consisting of an alkylglycoside, an alkylpolyglycoside, an alkoxylated alkylglycoside, an alkoxylated alkylpolyglycoside, an alkoxylated saccharide, an alkoxylated polysaccharide, an alkoxylated acetylene diol containing a symmetrically substituted triple bond or an ethoxylated polymethylsiloxyane.

22. A composition according to claim 1, which comprises a cationic surfactant selected from the group consisting of C_8-30-hydrocarbylamine and -diamine and -triamine being alkoxylated with at least 1 oxyethylene and/or oxypropylene group, a quaternary amine with at least one C_8-30-hydrocarbyl and/or hydrocarbylene group and an alkoxylated derivative thereof, and an amine modified polymethylsiloxane.

23. A composition according to claim 1, which comprises an anionic surfactant selected from the group consisting of a phosphate ester, a sulfonic acid, an ester and halfester of sulfosuccinic acid, a monosulfate ester of C_8-20-hydrocarbylalcohol and a sterylalcohol derivative, a naphthalene sulfonic acid derivative, a sulfonated vegetable oil and a sulfonated mono- and diester of a natural fatty acid, a tauride and a sarkoside and a sulfamido carbonic acid and an anionic derivative of a polymethylsiloxane.

24. Process for producing a herbicide composition according to claim 1, which comprises the following steps:

(a) producing a concentrated herbicide solution comprising a herbicide in the form of a salt and water,

(b) adding to said concentrated herbicide solution an acid or a base thereby resulting in precipitation of the herbicide in its completely or partly free acid form and formation of an electrolyte solution, which solution comprises the salt initially formed with the herbicide and the acid or base added.

25. An activating additive (adjuvant) in concentrated form for admixture with compositions containing glyphosate- and/or glufosinate for combating weeds, said additive comprising at least one surfactant in an amount of 4-58% by weight being emulsified, suspended and/or dissolved in a liquid, aqueous phase, and at least one undissolved, fine-grained, not biologically active, viscosity regulating filler, said filler acting to prevent the separation of the surfactant and being present in an amount of at least 0.3% by weight, characterized by comprising an electrolyte, which is dissolved in the liquid, aqueous phase and, which is not a surfactant, in an amount of at least 5% by weight.