Conductive polymer compositions

Details Conductive polymer compositions Conductive polymer compositions

H - Electricity

01

B

31/158

H01B 1/24 (2006.01) C08K 3/04 (2006.01) C08L 101/00 (2006.01)

Patent

CA 1168432

MP0712 ABRIDGEMENT The invention relates to conductive polymer compositions which comprise carbon black dispersed in a crystalline polymer and which exhibit PTC behavior below the melting point and very pronounced NTC behavior above the melting point. The invention recognises the value of such NTC behavior and discloses the selection of the polymer, carbon black and other components to obtain such NTC behavior. The compositions are useful in temperature- sensing devices and other electrical devices. Figure 1 shows the resistivity/temperature curve For a typical composition. -2-

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