METHOD FOR COATING DISCRETE PARTICLES

摘要

A method for coating glass spheres or other discrete particles in which a silane coupling agent and an anti-caking agent are successively applied to the particles as they are continuously advanced along a feed path. After the application of the coupling agent, but prior to the introduction of the anti-caking agent, the mass of particles is agitated and its rate of movement is slowed to increase the depth of the mass. The curing of the coupling agent is initiated by the application of heat prior to the addition of the anti-caking agent, and the curing is continued during and subsequent to the agitation of the particles to provide a uniform multi-layer coating on each particle.