Novel complex for use in stabilizing herbicidal compositions and methods for synthesizing and using the same
AssigneeBayer CropScience AG
InventorsTai-Teh WU, Karen L. EAGLES, Michael W. EDENFIELD
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Abstract
The present invention is directed to the discovery, isolation, identification and methods of synthesis of a novel chemical complex that can be used to stabilize mixtures of different chemical compounds, and in particular mixtures of different herbicidal compounds.
Claims19
A novel complexing agent for use in stabilizing a herbicidal composition wherein said complexing agent is a reaction product of:
- a. a herbicidal compound capable of transesterification and subject to relatively rapid hydrolysis of the esters in the absence of a weak acid buffer system;
- and
- b. a weak acid buffer system.
A method for preventing an undesirable acid catalyzed hydrolysis of fenoxaprop ethyl and/or fenoxaprop p-ethyl and an undesirable transesterification of pyrasulfotole in a herbicidal composition which includes fenoxaprop p-ethyl, pyrasulfotole, and at least one selected from the group consisting of bromoxynil, bromoxynil ester, bromoxynil mixed ester, and mefenpyr or mefenpyr diethyl comprising:
- a. providing a herbicidal composition comprising fenoxaprop ethyl and/or fenoxaprop p-ethyl, pyrasulfotole, and at least one selected from the group consisting of bromoxynil, bromoxynil ester, bromoxynil mixed ester, and mefenpyr;
- b. adding triethanolamine to said herbicidal composition;
- c. forming a complex in said composition having the x-ray structure of the formula:
- whereupon said triethanolamine prevents an undesirable acid catalyzed hydrolysis of fenoxaprop ethyl and/or fenoxaprop p-ethyl and said complex prevents an undesirable transesterification of said pyrasulfotole.
A metal complex comprising:
- a. an oil or non-oil soluble sulfonate cation of the formula [R—S(O)2O]n M(+n), where
- M is metal cation
- R is alkyl, aryl which can be substituted with 1 or more alkyl groups at different positions of the aryl ring and the alkyl chain can be linear or branched and the alkyl chain length can be 1 to 30, optionally 8 to 24
- n is 1 to 5.
A novel herbicidal composition comprising:
- a. an acid-sensitive herbicide;
- b. a weak acid herbicide;
- c. an ester herbicide;
- d. an optional safener;
- and
- e. an optional cation donating agent;
- wherein said herbicidal composition includes a complex, which complex prevents an acid catalyzed hydrolysis of said acid sensitive herbicide and prevents a transesterification of said weak acid herbicide.
A novel herbicidal composition comprising:
- a. an acid-sensitive herbicide;
- b. a weak acid herbicide;
- c. an ester herbicide;
- d. a buffer;
- e. an optional safener;
- and
- f. an optional cation donating agent;
- wherein said herbicidal composition includes a complex, which complex prevents an acid catalyzed hydrolysis of said acid sensitive herbicide and prevents a transesterification of said weak acid herbicide.
Dependencies are inferred from the claim text.