Compounding filled silicone compositions

摘要

High levels of inorganic filler, processing fluid and silicone polymer are compounded and devolatilized into homogeneous filled compositions with requisite reinforcing properties and levels of volatiles. In the method, a filler, processing fluid and silicone polymer are mixed in a first compounding apparatus (12,44,76) to produce a dispersed composition containing volatiles. The dispersed composition is then compounded in a long extruder (14,46,78) having an L/D ratio of greater than 50 to devolatilize the dispersed composition. <IMAGE>