Ptc compositions

Details Ptc compositions Ptc compositions

H - Electricity

05

B

356/121, 31/158

H05B 3/14 (2006.01) C08K 3/04 (2006.01) C08L 23/02 (2006.01) C08L 101/00 (2006.01) H01B 1/24 (2006.01) H01C 7/02 (2006.01) H05B 1/02 (2006.01)

Patent

CA 1115045

A B S T R A C T A composition having a positive temperature coefficient of resistance, comprising a thermoplastic component having at least two crystalline melting points, an elastomer and carbon black. The composition displays u switching temperature corresponding to each crystalline melting point. The compositions have use as heater components.

303529

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