CONDUCTIVE POLYMERS EXHIBITING PTC CHARACTERISTICS

摘要

ABRIDGEMENT Conductive polymer compositions which exhibit PTC behavior and which are useful, for example, in heating mammals and for other uses in which the surface of the heater must be maintained at a relatively low temperature. Preferred compositions comprise carbon black (or other particulate conductive filler) dispersed in a cross-linked polymer component comprising a cycloolefin polymer having a crystallinity of at least 5% and a melting point in the range 0.degree. to 80.degree.C.