PTC conductive polymer compositions
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 18, 1992
Issued Date -
N/A
app pub date -
Jun 1, 1990
filing date -
Apr 2, 1981
priority date (Note) -
Expired
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Abstract
Conductive polymer PTC compositions have improved properties, especially at voltages of 200 volts or more, if they are very highly cross-linked by means of irradiation, for example to a dosage of at least 50 Mrads, preferably at least 80 Mrads, e.g. 120 to 600 Mrads. The cross-linked compositions are particularly useful in circuit protection devices and layered heaters.
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