| 摘要 |
Process for the preparation of a dough which can be employed especially in compositions capable of being vulcanised by so-called polyaddition reaction and thus making it possible to obtain silicone elastomers, characterised in that the following are injected continuously and simultaneously into a twin-screw extruder, in at least four different places: a) - a polydiorganosiloxane oil whose viscosity at 25 DEG C is lower than 500,000 mPa s, advantageously lower than 250,000 mPa s and containing at least two =Si-CH=CH groups per molecule, b) - water, c) - silica, d) - a polysilazane which is liquid under normal temperature and pressure conditions. p |
