| abstract |
A (per)fluoroelastomeric composition curable by peroxidic way comprising for 100 phr of (per)fluoroelastomer: - as filler, from 2 to 70 phr of silica unwettable with water; - as crosslinking agent, from 0.5 to 10 phr of a bis-olefin having general formula: (I) wherein: R1, R2, R3, R4, R5, R6, equal to or different from each other, are H or C1-C5 alkyls; Z is selected between a C1-C18 linear or branched alkylene or cycloalkylene radical, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylene radical; the total residual content of metals in the (per)fluoroelastomeric composition being lower than 1,500 ppm, preferably lower than 1,000 ppm. |