Encapsulation process and encapsulated products (pheromones) that modifies the behaviour of an animal for use in pest-control in forestry, horticulture or agriculture

摘要

A process for encapsulating a partially water-miscible organic material within a polyurea or polyurethane shell, which process comprises: (a) Providing an aqueous phase containing a surfactant; (b) Dispersing in the aqueous phase a water-immiscible organic solvent in which the partially water-miscible material to be encapsulated and a polyisocyanate are dissolved or dispersed, to form a dispersion of droplets of organic solvent in the continuous aqueous phase; (c) Adding to the dispersion a water-soluble tertiary amine; (d)Thereafter adding to the dispersion a polyfunctional compound containing functional group selected from the group consisting of primary amine, secondary amine and hydroxy groups, whereby there is formed discrete capsules composed of the material encapsulated in a polyurea or polyurethane shell. The application involves the encapsulation of materials that will modify the behaviour of animal species, for example semiochemicals such as pheromones, and their use for pest-control in forestry, agriculture or horticulture.