| abstract |
Silicone doughs suitable for incorporation into diorganopolysiloxane compositions crosslinkable into elastomeric state are rapidly and conveniently formulated by continuously and simultaneously individually introducing along the longitudinal axis of a twin-screw extruder, via a plurality of longitudinally spaced discrete inlet entries, and twin-screw extruding (a) a polydiorganosiloxane oil having a viscosity at 25° C. of less than 500,000 mPa.s and containing at least two .tbd.Si-CH=CH 2 functional groups per molecule, (b) water, (c) silica, and (d) a polysilazane which is liquid under normal conditions of temperature and pressure. |