Patent ID: 9192908
Filing Date: 2015-11-24
Classification: B01J,Y10T

Abstract:
1. A process of 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 esters or one or more hydrocarbons with chain length up to about 18 carbons; optionally adding a surfactant; dispersing the mixture in the continuous phase by subjecting the mixture to agitation; heating the mixture for a time sufficient to enable the amine acrylate or methacrylate and the multifunctional acrylate or methacrylate to form a cationic prepolymer; dispersing the solid hydrophilic material in the oil continuous phase whereby the cationic prepolymer migrates to the solid hydrophilic material, thereby forming prepolymer adhered to the hydrophilic core materials; holding the temperature for a time sufficient to enable the cationic prepolymer to flow onto and coalesce into a continuous film surface coating on the hydrophilic core material; heating for a time and temperature sufficient to cross link the prepolymer continuous film surface coating on the particles.