| 摘要 |
A herbicidal composition is provided, the composition comprising an aqueous suspension of microcapsules, the microcapsules having a capsule wall of a porous 5 condensate polymer, wherein the microcapsules contain a solution of fluroxypyr in a rosin solvent system comprising rosin and/or a rosin derivative. There is also provided a herbicidal composition comprising microcapsules, the microcapsules having a capsule wall of a porous condensate polymer, wherein the microcapsules contain fluroxypyr and a solvent comprising rosin and/or a rosin derivative. A method of preparing a herbicidal composition is also disclosed, the method comprising the steps of providing a water immiscible phase comprising fluroxypyr and an isocyanate dissolved in a rosin solvent system comprising rosin and/or a rosin derivative; providing an aqueous phase comprising one or more surfactants; combining the water immiscible phase and the aqueous phase to form a dispersion of the water immiscible phase in the aqueous phase; adding to the resulting dispersion an amine, thereby forming microcapsules of polyurea containing droplets of the water immiscible phase; and curing the microcapsules. |
