Low volatility formulations of clomazone

Details Low volatility formulations of clomazone Low volatility formulations of clomazone

A - Human Necessities

01

N

A01N 25/28 (2006.01) A01N 43/80 (2006.01)

Patent

CA 2205440

A herbicidal composition containing from 1 to 4 pounds of clomazone per gallon of formulation and having a clomazone volatility less than fifty percent of that of an emulsifiable concentrate containing four pounds of clomazone per gallon of formulation is prepared by the interfacial reaction of polymethylene polyphenyl isocyanate with a polyfunctional amine selected from ethylenediamine, diethylenetriamine, triethylenetetramine, 1,6-hexanediamine, and their mixtures in an aqueous phase optionally containing from 0.05 to 0.25 weight percent of a xanthan gum viscosity modifier/stabilizer. Several such formulations and the method of their preparation are described.

Composition herbicide comprenant de 1 à 4 livres de clomazone par galon de formulation et ayant une volatilité de clomazone inférieure à 50 % par rapport à celle d'un concentré émulsifiable qui contient 4 livres de clomazone par gallon de formulation. On obtient la composition par réaction interfaciale de polyméthylène polyphényle isocyanate et d'une amine polyfonctionnelle choisie entre l'éthylènediamine, la diéthylènetriamine, la triéthylènetétramine, la 1,6-hexanediamine, et leurs combinaisons dans une solution aqueuse contenant, à titre facultatif, de 0,05 à 0,25 % en poids d'un modificateur/stabilisateur de viscosité de gomme de xanthane. L'invention décrit plusieurs formulations de ce type et leur méthode de préparation.

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