Patent ID: 8476356

Claim:
A method of making manufactured articles having resistance to vapour at high temperatures, of fluoroelastomeric or perfluoroelastomeric compositions curable by peroxidic way, comprising combining for 100 phr of fluoroelastomer or perfluoroelastomer: as filler, from 2 to 70 phr of carbon black having surface area CTAB (ASTM D 3765) between 25 and 35 m 2 /g; as crosslinking agent, from 0.5 to 10 phr of a bis-olefin having general formula; wherein: R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , equal to or different from each other, are H or C 1 -C 5 alkyls; Z is selected between a C 1 -C 18 linear or branched alkylene or cycloalkylene radical, optionally containing oxygen atoms, or a fluoropolyoxyalkylene or perfluoropolyoxyalkylene radical.