Glyphosate formulation

• US 6,451,735 B1
• Filed: 06/28/2000
• Issued: 09/17/2002
• Est. Priority Date: 09/10/1998
• Status: Expired due to Term

• Current Assignee: Syngenta Limited (China National Chemical Corporation)
• Original Assignee: Syngenta Limited (China National Chemical Corporation)
• Inventors: Formstone, Carl Andrew, Hopkins, Derek John, Bean, Michael John, Ottaway, Alan Victor
• Primary Examiner(s): CLARDY, S
• Application Number:
  US09/605,069
• Time in Patent Office: 811 Days
• Field of Search: 504/206, 504/365
• 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 25/02 containing liquids as carriers, diluents or solvents
• CPC Class Codes: A01N 25/30 characterised by the surfactants
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals

Abstract

A storage-stable high-strength aqueous glyphosate concentrate, preferably containing greater than 400 g/l glyphosate expressed as acid, comprises the potassium salt of glyphosate, an alkylglycoside surfactant and an alkoxylated alkylamine surfactant at a preferred total concentration of alkylglycoside and alkoxylated alkylamine from about 160 to 300 g/l and at a preferred ratio of alkylglycoside to alkoxylated alkylamine of from about 1 part by weight of alkylglycoside per 1 part by weight of alkoxylated alkyl amine to about 5 parts by weight of alkylglycoside per 1 part by weight of alkoxylated alkylamine.

Claims

1. A high strength aqueous glyphosate concentrate comprising the potassium salt of glyphosate, an alkylglycoside surfactant and an alkoxylated alkylamine surfactant, wherein the glyphosate concentration is greater than 400 g/l based on glyphosate acid content.

2. A glyphosate concentrate according to claim 1, wherein the concentration of the potassium salt of glyphosate is greater than 400 g/l based on glyphosate acid, the total concentration of the alkylglycoside surfactant and alkoxylated alkylamine surfactant in the aqueous concentrate is from about 160 to 300 g/l and the ratio of alkylglycoside surfactant to alkoxylated alkylamine surfactant is from about 1 part by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant to about 5 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant.

3. A glyphosate concentrate according to claim 1, wherein the glyphosate concentration is from 440 to 540 g/l based on glyphosate acid content.

4. A glyphosate concentrate according to claim 1, wherein the total content of the alkylglycoside surfactant and the alkoxylated alkylamine surfactant is from 160 to 300 g/l.

5. A glyphosate concentrate according to claim 4, wherein the ratio of alkylglycoside surfactant to alkoxylated alkylamine surfactant is from 1 part by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant to about 5 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant.

6. A glyphosate concentrate according to claim 5, wherein the ratio of alkylglycoside surfactant to alkoxylated alkylamine surfactant is from 2 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant to about 4 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant.

7. A glyphosate concentrate according to claim 5, wherein the ratio of alkylglycoside surfactant to alkoxylated alkylamine surfactant is from 1.5 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant to about 4 parts by weight of alkylglycoside surfactant per 1 part by weight of alkoxylated alkylamine surfactant.

8. The glyphosate concentrate of claim 4, wherein the total content of the alkylglycoside surfactant and the alkoxylated alkylamine surfactant is from 200 to 270 grams per liter.

9. A glyphosate concentrate according to claim 1, wherein the alkylglycoside surfactant has the formula

wherein n is the degree of polymerisation and is within the range from 1 to 3 and R⁵ is a branched or straight chain alkyl group having from 4 to 18 carbon atoms or a mixture of alkyl groups having an average value of from 4 to 18 carbon atoms.

10. A glyphosate concentrate according to claim 9, wherein R⁵ is 2-ethyl-1-hexyl, and n is from 1 to 2.

11. The glyphosate concentrate of claim 10, wherein n is from 1.5 to 1.9.

12. The glyphosate concentrate of claim 11, wherein n is about 1.75.

13. The glyphosate concentrate of claim 9, wherein n is an average of 1.7, and R⁵ is a mixture of 45% octyl and 55% decyl.

14. The glyphosate concentrate of claim 9, wherein n is an average of 1.6, and R⁵ is a mixture of 20% nonyl, 40% decyl and 40% undecyl.

15. A glyphosate concentrate according to claim 1, wherein the alkoxylated alkylamine surfactant is an ethoxylated or propoxylated or mixed ethoxylated and propoxylated C8 to C22 alkylamine having a degree of alkoxylation of from 1 to about 15.

16. A glyphosate concentrate according to claim 15 wherein the degree of alkoxylation is from 4 to 12.

17. The glyphosate concentrate of claim 15, wherein the alkoxylated alkylamine surfactant is an ethoxylated or propoxylated or mixed ethoxylated and propoxylated C10 to C20 alkylamine having a degree of alkoxylation of from 1 to about 15.

18. The glyphosate concentrate of claim 15, wherein the alkoxylated alkylamine surfactant is an alkoxylated derivative of cocoamine, an alkoxylated derivative of tallowamine, an alkoxylated derivative of oleylamine, an alkoxylated derivative of stearylamine, or a mixture thereof.

19. The glyphosate concentrate of claim 15, wherein the alkoxylated alkylamine surfactant is an ethoxylated C8 to C22 alkylamine having a degree of alkoxylation of from 1 to about 15.

20. The glyphosate concentrate of claim 19, wherein the alkoxylated alkylamine surfactant is an ethoxylated C10 to C20 alkylamine having a degree of alkoxylation of from 4 to 12.

21. The glyphosate concentrate of claim 20, wherein the alkoxylated alkylamine surfactant is an ethoxylated C10 to C20 alkylamine having a degree of alkoxylation of 5.

22. The glyphosate concentrate of claim 1, wherein the glyphosate concentration is from greater than 400 g/l to 550 g/l based on glyphosate acid content.

23. The glyphosate concentrate of claim 1, further comprising a viscosity modifying agent.

24. The glyphosate concentrate of claim 23, wherein the viscosity modifying agent is propylene glycol.

25. The glyphosate concentrate of claim 1, further comprising an antifoam agent.

26. A process of severely damaging or killing unwanted plants comprising preparing a diluted composition by diluting the glyphosate concentrate of claim 1 and applying to the plants a herbicidally effective amount of the diluted composition.

27. The process of claim 26, wherein the herbicidally effective amount of the diluted composition is from 0.001 to 20 kilograms per hectare.

28. The process of claim 27, wherein the herbicidally effective amount of the diluted composition is from 0.025 to 10 kilograms per hectare.