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US 6,582,588 B1Granted
High temperature, low oxidation stabilization of pitch fibers
AssigneeConocoPhillips Company
InventorsAndrea K. Zimmerman, John A. Rodgers, H. Ernest Romine, James R. McConaghy, Lorita Davis
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Abstract
The present invention provides a process for thermosetting pitch fibers in reduced times, at low concentrations of oxygen and at higher temperatures than previously possible. Additionally, the present invention provides a pitch fiber which has an oxygen diffusion rate to the center of the fiber which is competitive with the rate of oxidation at the fiber's surface. Further, the present invention provides a high density pitch fiber batt which thermosets without loss of fiber structure.
Claims13
A process for stabilizing a pitch artifact comprising:
- heating said pitch artifact to an initial process temperature at least equal to the spinning temperature of said pitch artifact while exposing said pitch artifact to an oxidizing agent for a time sufficient to stabilize said pitch artifact, wherein the pitch artifact is heated for a total processing time ranging from about 1 to about 150 minutes.
Dependencies are inferred from the claim text.