Pipes and tubular conduits – Flexible – Distinct layers
Reexamination Certificate
2006-02-21
2006-02-21
Hook, James (Department: 3754)
Pipes and tubular conduits
Flexible
Distinct layers
C138S141000, C138S098000, C428S036910
Reexamination Certificate
active
07000646
ABSTRACT:
A pipe or liner for use in the oil and gas industry that comprises a melt-mixed bend of polyamide and grafted fluoropolymer having polar functionality where the grafted fluoropolymer having polar functionality exists as a discontinuous phase that is dispersed in a polyamide matrix. The pipe or liner has enhanced resistance to the permeation of hydrocarbons relative to polyethylene. A further embodiment is fuel lines that comprise a melt-mixed bland of polyamide and a grafted fluoropolymer having polar functionality.
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E. I. du Pont de Nemours and Company
Hook James
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