PROCESS FOR CONTINUOUSLY MANUFACTURING SILICONE COMPOSITIONS

摘要

PURPOSE: A process for continuously manufacturing silicone compositions is provided to continuously compounds high levels of filler, processing fluid and silicone polymer into homogeneous filled heat-vulcanizable silicone compositions with requisite reinforcing properties and levels of volatile matters. CONSTITUTION: High levels of fumed silica, processing fluid and high molecular weight silicone polymer are continuously compounded into a homogeneous silica filled heat-vulcanizable silicone composition by mixing filler and high viscosity silicone polymer continuously in a first co-rotating intermeshing double screw extruder(112) and continuously compounding the filler and silicone polymer mixture from the first extruder in a second extruder(114) comprising a single shaft reciprocating extruder.