Material having a resistivity with a positive temperature coefficient
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United States of America Patent
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Oct 30, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1988
filing date -
Apr 15, 1987
priority date (Note) -
Expired
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Abstract
The invention relates to an electrically conductive, polymer based material with electrical resistivity having a positive temperature coefficient. The material comprises a matrix of thermosetting polymer having conductive particles in the form of fibers distributed through the polymer. The polymer can be an epoxy resin, polyimide, unsaturated polyester, silicone, polyurethane or phenolic resin, and the fibers can be carbon fibers, carbon fibers coated with metal or metal alloy, graphite fibers, graphite fibers coated with metal or metal alloy, graphite intercalation compound fibers, metal fibers, ceramic fibers, or ceramic fibers coated with a metal or metal alloy.
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