PROCESS OF SPRAY MICRO-ENCAPSULATION AND COMPOSITION FOR USE THEREIN

摘要

The composition comprises 35 to 99% by weight of a liquid vehicle, 0.1 to 25% by weight of a film-forming polymer which is either dissolved or dispersed in the vehicle, 1 to 40% by weight of a core agent which is insoluble in the film-forming polymer and which controls release of encapsulated material from the microcapsules (the core agent being optionally absent when the polymer is dispersed in the vehicle), and not more than 40% by weight of material to be encapsulated which is dissolved or dispersed in the liquid vehicle. The process comprises spraying the composition into the atmosphere so as to cause the liquid vehicle to evaporate and the polymer to coacervate and form microcapsules while the composition is still in the form of a spray.