Polymeric pipes and liners and fuel lines made from blends of fluoroppolymers and polyamides
AssigneeE. I. Du Pont de Nemours and Company
InventorSteven A. Mestemacher
Life of this patent
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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.
Claims18
A pipes or liner suitable for use in transporting substances in oil and gas applications, comprising a melt-mixed blend of:
- (a) at least one polyamide and;
- (b) at least one grafted fluoropolymer having polar functionality, wherein said fluoropolymer is incompatible with said at least one polyamide (a);
- wherein said polyamides (a) are in a continuous matrix phase and said fluoropolymers (b) are present in a discontinuous distributed phase in the form of a multitude of thin, substantially parallel, and overlapping layers of material embedded in the continuous phase.
A fuel line, comprising a melt-mixed blend of:
- (a) at least one polyamide and;
- (b) at least one grafted fluoropolymer having polar functionality, wherein said fluoropolymer is incompatible with said at least one polyamide (a);
- wherein said polyamides (a) are in a continuous matrix phase and said fluoropolymers (b) are present in a discontinuous distributed phase in the form of a multitude of thin, substantially parallel, and overlapping layers of material embedded in the continuous phase.
Dependencies are inferred from the claim text.