Adhesive composition for electrical PTC heating device
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United States of America Patent
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Feb 8, 2005
Grant Date -
N/A
app pub date -
May 4, 2000
filing date -
Aug 1, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an electrically and thermally conductive adhesive composition for cementing together at least one metallized (e.g. aluminized or silvered) surface of a positive temperature coefficient (PTC) element to at least one metallic (e.g. aluminum) electrode, in the manufacture of PTC thermistor devices which are potentially capable of operating in a working temperature range not less than -55.degree. C. to +300.degree. C. and for at least 30,000 hours. The composition comprises, as the adhesive component, a curable silicone (e.g. silicone rubber) prepolymer, as well as finely divided silicon carbide and finely-divided silicon, and preferably also a finely-divided metallic powder.
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