ADHESIVE COMPOSITION FOR ELECTRICAL PTC HEATING DEVICE

摘要

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 (11) to at least one metallic (e.g. aluminum) electrode (14), in the manufacture of PTC thermistor devices which are potentially capable of operating in a working temperature range not less than -55 DEG C to +300 DEG 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.