Patent ID: 9186641
Filing Date: 2015-11-17
Classification: B01J,B32B,C09K,H01F,Y10T

Abstract:
1. A method of preparing microcapsules adapted to rupture in a magnetic field, comprising the steps of: providing organosilane-coated magnetic nanoparticles; incorporating one or more of the organosilane-coated magnetic nanoparticles into a shell of each of a plurality of microcapsules so that the one or more organosilane-coated magnetic nanoparticles is/are embedded in the shell of each of the plurality of microcapsules, wherein the shell of each of the plurality of microcapsules encapsulates a solvent, and wherein the step of incorporating one or more of the organosilane-coated magnetic nanoparticles into the shell of each of the plurality of microcapsules includes the step of incorporating one or more of the organosilane-coated magnetic nanoparticles into the shell of each of a plurality of urea-formaldehyde (UF) microcapsules during in situ polymerization of the UF microcapsules.