Auxin herbicidal mixtures
AssigneeMonsanto Technology LLC
InventorsDaniel R. Wright, Junhua Zhang
Life of this patent
Estimating the term…
Abstract
Herbicidal mixtures comprising an auxin herbicide and an adjuvant comprising a salt having a quaternary ammonium cation and/or a phosphonium cation are described. The adjuvant reduces the volatility of the auxin herbicide and/or counteracts the negative impact on the volatility of the auxin herbicide caused by the addition of a co-herbicide. Methods of preparing the herbicidal mixtures are also described.
Claims41
A method of preparing a herbicidal mixture, the method comprising:
- combining an auxin herbicide comprising a first cation and an adjuvant comprising a salt comprising a second cation, wherein the salt is selected from the group consisting of:
- (a) an ammonium salt of Formula I
- wherein R1, R2, R3, and R4 are each butyl and X is an agronomically acceptable anion;
- (b) a salt containing a nitrogen heterocycle of Formula II
- wherein A is a 5 or 6-membered heterocyclic ring;
- R5 is a C1-C20 alkyl;
- R6 is hydrogen or a C1-C6 alkyl, and X is an agronomically acceptable anion;
- (c) a phosphonium salt of Formula III
- wherein R7, R8, R9, and R10 are independently a C1-C12 hydrocarbyl and X is an agronomically acceptable anion;
- and mixtures thereof, and wherein the herbicidal mixture has a total herbicide concentration no greater than about 40% by weight acid equivalent (a.e).
2-33. (canceled)
A herbicidal mixture, comprising:
- an auxin herbicide comprising a first cation and an adjuvant comprising a salt comprising a second cation, wherein the salt is selected from the group consisting of:
- (a) an ammonium salt of Formula I
- wherein R1, R2, R3, and R4 are each butyl and X is an agronomically acceptable anion;
- (b) a salt containing a nitrogen heterocycle of Formula II
- wherein A is a 5 or 6-membered heterocyclic ring;
- R5 is a C1-C20 alkyl;
- R6 is hydrogen or a C1-C6 alkyl, and X is an agronomically acceptable anion;
- (c) a phosphonium salt of Formula III
- wherein R7, R8, R9, and R10 are independently a C1-C12 hydrocarbyl and X is an agronomically acceptable anion;
- and mixtures thereof, and wherein the herbicidal mixture has a total herbicide concentration no greater than about 40% by weight acid equivalent (a.e).
(canceled)
(canceled)
The herbicidal mixture of claim 85 wherein the salt of Formula I is selected from the group consisting of tetrabutylammonium chloride and tetrabutylammonium bromide.
The herbicidal mixture of claim 90 wherein A is a substituted imidazole ring, a substituted pyridine ring, or a substituted pyrrolidine ring;
- R5 is C1-C12 alkyl;
- and/or
- the salt of Formula II is selected from the group consisting of 1-butyl-1-methyl-pyrrolidinium chloride, 1-ethyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, 1-methyl-3-octylimidazolium chloride, cetylpyridinium chloride, and cetylpyridinium bromide.
(canceled)
(canceled)
The herbicidal mixture of claim 91 wherein R7, R8, R9, and R10 are independently C1-C12 alkyl;
- and/or
- the salt of Formula III comprises tetrabutylphosphonium chloride.
(canceled)
(canceled)
(canceled)
49-51. (canceled)
54-56. (canceled)
(canceled)
(canceled)
(canceled)
67-82. (canceled)
Dependencies are inferred from the claim text.