| 摘要 |
It is known to encapsulate various materials in polyurea microcapsules, but obtaining satisfactory microcapsules incorporating alcoholic materials has proven difficult. A process has now been found where polyurea microcapsules are formed by interfacial polymerization between an aqueous phase and a water-immiscible phase, and properties, particularly the solubility parameters, of the water immiscible phase are closely matched to corresponding properties of the polyurea. Microcapsules prepared by this process have improved stability, mechanical strength and controlled release properties. |
