PERFLUOROELASTOMERIC COMPOSITIONS AND METHODS

摘要

An elastomeric composition having improved resistance to chemical attack is provided, the elastomeric composition including a perfluoroelastomer and a non-fibrillating particulate fluorographite. Also, a process for improving the processibility and resistance to chemical attack of a perfluoroelastomer is provided, in which the perfluoroelastomer is mixed with a non-fibrillating fluorocarbon particulate polymer to form an elastomeric composition which is processed at a temperature less than the melting temperature of the non-fibrillating fluorocarbon particulate polymer to disperse the fluorocarbon polymer throughout the perfluoroelastomer while maintaining the fluorocarbon polymer in particulate form. A method of making a seal which is resistant to chemical attack for preventing the leakage of a fluid between a first member and a second member is also provided.