Conductive polymer composition

Details Conductive polymer composition Conductive polymer composition

H - Electricity

01

C

31/158

H01C 7/02 (2006.01)

Patent

CA 1334480

Electrical devices with improved resistance stability comprise a PTC element comprising a conductive polymer and two electrodes. The conductive polymer composition comprises an organic crystalline polymer and carbon black with a pH of less than 4Ø Particularly preferred conduc- tive polymer compositions comprise carbon blacks which have a pH of less than 4.0, a dry resistivity RCB and a particle size D in nanometers such that RCB/D is at most 0.1. Electrical devices of the invention include heaters and circuit protection devices.

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