Abstract: A method of coating tablets with a high molecular weight polymer wherein the high molecular weight polymer is suspended in a non-solvent, non-aqueous liquid carrier. The liquid carrier may include a low-viscosity binder. Preferably, the binder is included in concentrations of around 1-10% by weight in solution in the carrier. The high molecular weight polymer may be micronized prior to its suspension in the liquid carrier. Once suspended, the liquid is introduced into a spray coating machine such as a partially or fully perforated pan system wherein the tablets are coated as desired.

Abstract: A method is provided for applying polymers to coat particulate cores in a rotor processor. The processor is actuated to create a circulating bed of cores in the rotor chamber. Dry powdered glidant is introduced into the rotating bed of cores, which are simultaneously sprayed with a polymer solution. The glidant enhances processability by eliminating or minimizing agglomeration of the cores. Air from above and below the rotating bed evaporates the solution to leave a polymer layer on the cores. Layers of polymer build up on the cores until a desired thickness is achieved.

Abstract: The method for applying a dry polymer layer to particulate cores circulating as a bed in a rotor processor includes the steps of loading the cores into the processor, rotating the rotor of the processor and supplying air into the processor to create the bed, spraying the cores with a wetting agent, and supplying dry polymer powder into the bed so as to adhere onto the wetted cores and thereby build up a continuous smooth layer of polymer on the cores. The wetting agent includes a plasticizer so as to facilitate uniform layering of the micronized polymer powder.