Patent ID: 8455098
Filing Date: 2013-06-04
Classification: B01J,Y10T

Abstract:
1. A process for forming a population of microcapsules comprising a solid hydrophilic core material and a wall material at least partially surrounding the core material, the microcapsule population being formed by: providing particles of a solid hydrophilic core material; providing an oil continuous phase which is low boiling, the oil continuous phase comprising one or more hydrocarbons with chain length up to about 18 carbons; dividing the oil continuous phase into oil dispersing into oil dispersing into oil subjecting oil combining oil subjecting the combined oils to one or more heating steps, forming a cationic wall prepolymer; forming a mixture by dispersing the solid hydrophilic material into the oil continuous phase and mixing for a sufficient time to allow the wall prepolymer to migrate to and deposit onto the solid hydrophilic core material particles; optionally adding a surfactant; holding the temperature for a time sufficient to enable the cationic prepolymer to flow and coalesce into a continuous film surface coating on the hydrophilic core material; heating the mixture for a time sufficient to cross-link the deposited prepolymer continuous film surface coating on the surface of the particles.