Compositions containing glufosinate and a synthetic auxin herbicide
Inventors
Assignees
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Publication Number
US-12550901-B2
Publication Date
2026-02-17
Expiration Date
Abstract
Aqueous herbicide compositions containing a salt of glufosinate and a salt of a synthetic auxin herbicide are described. Such compositions exhibit good compatibility and reduced viscosity. Methods of reducing the viscosity of an aqueous herbicide composition are also disclosed.
Core Innovation
The invention is an aqueous herbicide composition that combines a water soluble salt of glufosinate with a water soluble salt of a synthetic auxin herbicide selected from 2,4-D and a surfactant. The composition is defined on an acid equivalent basis and includes a surfactant selected from sodium lauryl ether sulfate, an isopropyl ammonium lauryl ether sulfate, and combinations thereof. The composition exhibits a reduction in viscosity at 15 ° C. to 25 ° C. compared to a similar composition where the synthetic auxin herbicide salt is omitted.
The viscosity reduction is specified as between about 40% to about 90% at a temperature between 15 ° C. and 25 ° C. The composition also specifies an ae-based weight ratio of the synthetic auxin herbicide salt to the glufosinate salt of from 1:3 to 3:1. The synthetic auxin herbicide salt is derived by neutralizing the synthetic auxin herbicide acid with a choline cation.
The glufosinate salt is derived by neutralizing glufosinate acid with either a quaternary organic ammonium cation of the stated formula or with an organic amine compound of the stated formula. The composition is further characterized by having no phase separation at about 0 ° C. The document also includes concentrate and spray-mixture embodiments, and describes example formulations and viscosity measurement behavior including lower viscosities when 2,4-D choline or dicamba choline is present with glufosinate and the surfactant.
Claims Coverage
The document includes one independent claim. The independent claim requires multiple aqueous formulation components and specific salt-formation and stability conditions, with viscosity reduction as a functional limitation.
Aqueous herbicide composition with glufosinate salt, synthetic auxin salt, and ether sulfate surfactant
An aqueous herbicide composition comprising from about 1 to about 25 wt % ae of a water soluble salt of glufosinate, from about 1 to about 25 wt % ae of a water soluble salt of a synthetic auxin herbicide selected from the group including 2,4-D, and from about 1 to about 25 weight percent (wt %) of a surfactant selected from the group consisting of a sodium lauryl ether sulfate, an isopropyl ammonium lauryl ether sulfate, and combinations thereof, wherein the composition exhibits a reduction in viscosity between about 40% to about 90% at a temperature between 15 ° C. to 25 ° C. when compared to a similar composition where the synthetic auxin herbicide salt is omitted.
Synthetic auxin to glufosinate ae weight ratio
The composition includes, on an ae basis, a weight ratio of the synthetic auxin herbicide salt to the glufosinate salt of from 1:3 to 3:1.
Choline cation neutralization of synthetic auxin herbicide acid
The water soluble salt of the synthetic auxin herbicide is derived by neutralizing the synthetic auxin herbicide acid with a choline cation.
Defined neutralizing cations/amine for glufosinate salt
The water soluble salt of glufosinate is derived by neutralizing glufosinate acid with either a cation selected from the group consisting of a quaternary organic ammonium cation of the formula in which R1, R2, R3, and R4 are independently linear or branched (C1-C16) alkyl, (C1-C16) arylalkyl, or (CH2CH2O)nH and n is an integer from 1-3; or (ii) an organic amine compound of the formula with the stated substituent definitions for R1-R5, R4, R5 OH or C1-C6 alkyl, R5 O(CH2)n, X R6 or R7NR8R9 with the stated relationships and indices n, m, and z.
No phase separation at about 0 ° C.
The composition has no phase separation at about 0 ° C.
Across the independent claim, the inventive concept is centered on an aqueous herbicide formulation that combines defined wt % ae amounts of glufosinate salt and synthetic auxin herbicide salt with a specified ether sulfate surfactant, achieves a specified 40% to 90% viscosity reduction at 15 ° C. to 25 ° C. compared to omission of the synthetic auxin salt, and is further constrained by defined ae weight ratios, specific salt-formation neutralization (choline for the auxin salt and defined quaternary ammonium or organic amine structures for the glufosinate salt), and no phase separation at about 0 ° C.
Stated Advantages
Reduction in viscosity between about 40% to about 90% at 15 ° C. to 25 ° C. compared to a similar composition where the synthetic auxin herbicide salt is omitted.
No phase separation at about 0 ° C.
Documented Applications
Controlling undesirable vegetation by applying the aqueous herbicide composition to the vegetation or its location after emergence, or to soil to prevent emergence.
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