Solid particles are coated with a polymer coating, by a process that includes, dispersing the uncoated particles in water, containing a wetting agent, adding a liquid polymer coupling agent, so that the dispersed solid particles have a film of the coupling agent, and agitating the mixture while adding...http://www.google.com.au/patents/US5405648?utm_source=gb-gplus-sharePatent US5405648 - Coating particulate material with a polymer film
