Patent ID: 6921565

Claim:
A hose comprising: (1) a rubber layer comprising an FKM fluoroelastomer; and (2) a barrier layer comprised of a thermoplastic quadpolymer derived from (i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF 2 ═CFR f where R f is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF 2 ═CF—(OCF 2 CF(R f )) a OR′ f , where R f is as described in (iii), R′ f is a perfluoroaliphatic, preferably a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8, preferably 1 to 3, carbon atoms, and “a” has a value of 0 to 3; wherein the barrier layer is adhered to the rubber layer with an adhesive amount of a thermoplastic terpolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride.