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US 4,360,626 AGranted
Oxidatively stable polyimide compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorCarl H. Manwiller
Life of this patent
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Abstract
Graphite-filled polyimide compositions of excellent high temperature stability obtained through use of graphite having low reactive impurity content.
Claims3
In a non-melt fabricable polyimide composition containing about from 5 to 75 volume percent graphite, the improvement wherein the graphite contains less than about 0.15 weight percent of at least one reactive impurity selected from the group consisting of ferric sulfide, barium sulfide, calcium sulfide, copper sulfide, barium oxide, calcium oxide, and copper oxide.
Dependencies are inferred from the claim text.