Precipitated silica with enhanced properties.

摘要

Precipitated silica characterised in that: a) - it has a luminance Y of at least 90, b) - when it is subjected to a treatment at 400 DEG C under a nitrogen stream for 4 hours its luminance Y decreases by not more than 5.5%, c) - when it is subjected to a treatment with a stream of octamethylcyclotetrasiloxane at 400 DEG C for 1 hour 30 min its luminance Y decreases by not more than 5.5%. Process for the preparation of such a silica. Use of this silica for the preparation of siloxane elastomers, more especially of elastomers which can be vulcanised when heated.