Process for reducing the level of residual isocyanate in microscapsulas of polyurea, the process of microencapsulacao material core and micro capsules of polyurea

摘要

Post-treatment of microcapsules having polyurea walls with ammonia or amines to reduce the residual isocyanate level and modify permeability of the microcapsule wall. Flowable formulations of the polyurea microcapsules then can be stored at pH values below 8 without generating carbon dioxide from the reaction of residual isocyanate groups with water.