Method for continuously producing liquid silicone rubber base

摘要

A method for continuously producing a liquid silicone rubber base by mixing a composition comprising 100 parts by weight of a liquid diorganopolysiloxane containing alkenyl groups 1 from 5 to 100 parts by weight of a reinforcing silica filler 2, and a hydrophobing agent adapted to hydrophobe the silica filler 3 in an amount equivalent to from 1 to 30 % by weight of the reinforcing silica filler into and through a first co-rotating twin-screw continuous kneader/extruder 10 at a temperature of from 0 to 100{C to form a mixture and then feeding the mixture continuously into and through a second co-rotating twin-screw continuous kneader/extruder 15 at a temperature of from 150 to 300{C. Reagent 3 is preferably hexamethyldisilazane.