The present invention relates to a hose construction containing a thermoplastic
barrier and a fluoroelastomer rubber layer. The hose comprises (1) a rubber
layer comprising FKM rubber; 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 CF2CFRf
where Rf is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms,
and (iv) a perfluorovinyl ether of the formula CF2CF-(OCF2
CF(Rf))aORf where Rf is
as described in (iii), Rf 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 derived from tetrafluoroethylene,
hexafluoropropylene and vinylidene fluoride.
