EMULSIFIABLE CONCENTRATE COMPRISING A PHENOXY-ALKANOIC ACID HERBICIDE

• US 20180139955A1
• Filed: 05/06/2016
• Published: 05/24/2018
• Est. Priority Date: 05/07/2015
• Status: Active Grant

• Current Assignee: Nufarm Australia Limited (Nufarm Ltd.)
• Original Assignee: Nufarm Australia Limited (Nufarm Ltd.)
• Inventors: PANAYI, Aristos, SILVA, Claudio, SAYER, Chad Richard Ord, SHARMA, Sumit
• Granted Patent: US 10,492,488 B2
• Time in Patent Office: Days
• CPC Class Codes: A01N 25/02 containing liquids as carriers, diluents or solvents
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 39/04 Aryloxy-acetic acids; Derivatives thereof
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals

Abstract

An emulsifiable concentrate of a phenoxy-alkanoic acid herbicide comprising a phenoxy-alkanoic acid herbicide dissolved in an amide solvent and at least one amine.

Claims

1-28. -28. (canceled)

29. An emulsifiable concentrate of a phenoxy-alkanoic acid herbicide comprising a phenoxy-alkanoic acid herbicide in the form of the free acid dissolved in an amide solvent and at least one amine.

30. An emulsifiable concentrate according to claim 29, wherein the amine comprises at least one amine of formula (I)

31. An emulsifiable concentrate according to claim 29, wherein the amine comprises at least one amine of formula I

32. An emulsifiable concentrate according to claim 30, wherein the amine comprises at least one of formula (I) wherein (i) R¹, R² and R³ are independently selected from C₂ to C₄ alkanol or (ii) R¹ is selected from C₁ to C₆ alkoxy-substituted alkyl and R² and R³ are hydrogen or C₁ to C₄ alkyl.

33. An emulsifiable concentrate according to claim 29, wherein the amine is selected from the group consisting triethanolamine, triisopropanolamine, methoxypropylamine, hexyloxypropylamine and mixtures of two or more thereof.

34. An emulsifiable concentrate according to claim 29, wherein the amine is present in an amount of from 0.5% to 5% by weight of the amine based on the weight of emulsifiable concentrate.

35. An emulsifiable concentrate according to claim 29, wherein the amide solvent comprises at least one compounds of formula II:

36. An emulsifiable concentrate according to claim 35, wherein amide solvent is of formula II wherein

R⁴ is C₆ to C₁₇ alkyl;

and

R⁵ and R⁶ are independently selected from C₁ to C₄ alkyl.

37. An emulsifiable concentrate according to claim 29, wherein amide solvent is selected from the group consisting of N,N-dimethyl octanamide, N,N-dimethyl decanamide, N,N-dimethyl caprylamide, N,N-dimethyl 2-ethylhexanoamide, N,N-dimethyl oleamide, N,N-dimethyllauricamide, N,N-dimethylmyristicamide, N,N-dimethyl 9-decenamide and mixtures of two or more thereof.

38. An emulsifiable concentrate according to claim 29, wherein the amide solvent is present in an amount of from 25% to 60% by weight of the composition by weight of the emulsifiable concentrate composition.

39. An emulsifiable concentrate according to claim 29, wherein phenoxy-alkanoic acid herbicide comprises at least one selected from the group consisting of:

phenoxyacetic herbicides selected from 2,4-D and MCPA;

phenoxybutyric herbicides selected from the group consisting of 4-CPB, 2,4-DB, 3,4-DB, MCPB and 2,4,5-TB; and

phenoxypropionic herbicides selected from the group consisting of dichlorprop, dichlorprop-P, fenoprop, mecoprop and mecoprop-P.

40. An emulsifiable concentrate according to claim 29, wherein the phenoxy-alkanoic acid herbicide is 2,4-D, MCPA or a mixture thereof.

41. An emulsifiable concentrate according to claim 29, wherein phenoxy-alkanoic acid herbicide is present in a total amount of at least 200 g acid per litre of emulsifiable concentrate.

42. An emulsifiable concentrate according to claim 29, wherein the phenoxy-alkanoic acid is present in a total amount of at least 400 g acid per litre of emulsifiable concentrate.

43. An emulsifiable concentrate according to claim 29, further comprising a hydrocarbon co-solvent which has a flash point of at least 60.5°

C. and comprises at least one hydrocarbon selected from alkyl substituted aromatics.

44. An emulsifiable concentrate according to claim 43, wherein the hydrocarbon co-solvent is present in an amount in the range of from 2% to 25% w/w of the emulsifiable concentrate.

45. An emulsifiable concentrate according to claim 29, comprising emulsifier in an amount in the range of from 5% w/w to 25% w/w of the emulsifiable concentrate composition which comprises a non-ionic emulsifier selected from alcohol ethoxylates, fatty acid ethoxylates, fatty amide ethoxylates and EO/PO block copolymers including butyl based block copolymers, in an amount in the range of from 2% w/w to 20% w/w of the emulsifiable concentrate composition.

46. An emulsifiable concentrate according to claim 29 comprising emulsifier in an amount in the range of from 5% w/w to 25% w/w of the emulsifiable concentrate composition which comprises anionic emulsifier in an amount of from 1% to 10% w/w of the composition and non-ionic emulsifier in an amount of from 2% to 15% w/w of the composition.

47. An emulsifiable concentrate according to claim 29 comprising no more than 5% water based on the weight of the emulsifiable concentrate.

48. A method of controlling weeds comprising providing a phenoxy-alkanoic acid emulsifiable concentrate according to claim 29, diluting the concentrate with water to provide an emulsion and applying the diluted concentrate to the weeds to be controlled.