AGROCHEMICAL COMPOSITION, METHOD FOR ITS PREPARATION AND USE THEREOF

摘要

A composition having an active compound contained within a microcapsule, the microcapsule having a wall comprising a polyurea formed by a polyisocyanate and a cross linking agent, the cross linking agent being the product of the reaction of a hydroxide salt with the copolymerization product of styrene and maleic anhydride. The active compound may be an agrochemical, in particular a herbicide or an insecticide. A process for the preparation of a microencapsulated active component including: providing an aqueous phase comprising a cross linking agent being the product of the reaction of a hydroxide salt with the copolymerization product of styrene and maleic anhydride; providing a first water-immiscible organic phase comprising an active ingredient to be encapsulated and a first polyisocyanate; dispersing the first organic phase in the aqueous phase; and allowing an interfacial polymerization reaction to occur at the interface of the organic phase and the aqueous phase to form a polyurea shell having the active component encapsulated therein.