Patent ID: 8318850

Claim:
A cured perfluoroelastomer article comprising A) a perfluoroelastomer comprising copolymerized units of i) 15 to 60 mole percent perfluoro(alkyl vinyl ether), ii) 0.1 to 5 mole percent of a cure site monomer having nitrile groups, and the remaining copolymerized units being of iii) tetrafluoroethylene so that total mole percent is 100; B) 75 to 85 parts by weight, per hundred parts by weight perfluoroelastomer, of carbon black; and C) 1 to 15 parts by weight, per hundred parts by weight perfluoroelastomer, of a perfluoropolyether, wherein said cured perfluoroelastomer article has a hardness (Shore M) of at least 85 and an elongation at break, measured according to ASTM D412-92/D1414, greater than 75%.