Blends of fluoroelastomer interpolymers with thermo fluoroplastic interpolymers and the use of such blends in hoses

A fuel hose having improved fuel vapor barrier properties comprising:

• a barrier layer comprising a blend of about 20 to 80 weight percent of a first fluorointerpolymer having a fluorine content of about 65 to 73 weight percent with about 80 to 20 weight percent of a second fluorointerpolymer having a fluorine content of about 70 to 75 weight percent, wherein said first fluorointerpolymer is a copolymer or terpolymer formed by the copolymerization of two or more monomers selected from the group consisting of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene, and said second fluorointerpolymer is a terpolymer formed by the copolymerization of hexafluoropropylene, vinylidene fluoride and tetrofluororethylene monomers;
• and
• a protective cover layer wherein said first fluorointerpolymer exhibits elastomeric characteristics and said second fluorointerpolymer exhibits thermoplastic characteristics.

In a hose for transporting fuels, the improvement which comprises employing, as a barrier layer, a blend of about 20 to 80 weight percent of a first fluorointerpolymer having a fluorine content of about 65 to 73 weight percent with about 80 to 20 weight percent of a second fluorointerpolymer having a fluorine content of about 70 to 75 weight percent, wherein said first fluorointerpolymer is a copolymer or terpolymer formed by the copolymerization of two or more monomers selected from the group consisting of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene, and said second fluorointerpolymer is a terpolymer formed by the copolymerization of hexafluoropropylene, vinylidene fluoride and tetrofluorethylene monomers, wherein said first fluorointerpolymer exhibits elastomer characteristics and said second fluorointerpolymer exhibits thermoplastic characteristics.