Hose construction containing fluoroplastic terpolymers

Details Hose construction containing fluoroplastic terpolymers Hose construction containing fluoroplastic terpolymers

1999-04-26

2001-07-17

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S035700, C428S421000, C428S475500, C428S480000, C138S141000, C138S153000, C138S172000

Reexamination Certificate

active

06261657

ABSTRACT:

BACKGROUND OF THE INVENTION
A major proportion of fuel hose presently employed in automobile applications is a multi-layered structure. The innermost tubular layer of the hose is formed of an elastomeric material intended to keep the fluid in the hose. Located between the inner core and the outer elastomeric cover is a barrier layer. In other fuel hoses, the barrier layer is the innermost tubular layer (known as a veneer hose), with the elastomeric material being located outside of such barrier layer. Many barrier layers have been used; however, many such compounds used in the barrier do not adhere to the conventional elastomeric material used in the innermost tubular layer. As a result of this problem, those skilled in the art conventionally use a layer between the inner core and the barrier layer which is both compatible to the elastomer used in the inner core and the barrier layer. Use of these “compatible” layers further adds to the cost and the resulting diameters of these fuel hose applications.
SUMMARY OF THE INVENTION
There is disclosed a hose comprising
(1) a rubber layer comprising (a) hydrogenated acrylonitrile butadiene rubber and (b) from 2 to 15 phr of an organophosphonium salt; (c) from 5 to 30 phr of trioctyl trimellitate; and (d) from 5 to 30 phr of a dialkyl diether glutarate; and
(2) a barrier layer comprised of a terpolymer derived from tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride, wherein said barrier layer is directly adhered to said rubber.


REFERENCES:
patent: 5588469 (1996-12-01), Kakiuchi et al.

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