| 摘要 |
Co-vulcanizable compositions comprising (A) 55-85% by weight of a fluoroelastomeric copolymer of vinylidene fluoride with perfluoropropene and possibly tetrafluoroethylene; (B) 4515% by weight of a copolymer of tetrafluoroethylene and propylene; (C) 0.7-2.5 parts, per 100 parts of (A)+(s) blend, of a bisphenolic compound; (D) 0.3-1.5 parts, per 100 parts of (A)+(B) blend, of a quaternary ammonium, phosphonium or aminophosphonium organic compound; (E) 0.4-5 parts, per 100 parts of (A)+(B) blend, of an organic peroxide; (F) 1-5% by weight, as referred to (A)+(B), of a peroxidic cross-linking coagent. The compositions which are useful in the automobile and the oil receiving fields have optimum characteristics of extrusion, optimum stability of SF oils and optimum strength of steam and to the mixture water in ethylene glycol at high temperature. |
