Polymer composition having positive temperature coefficient char

Details Polymer composition having positive temperature coefficient char Polymer composition having positive temperature coefficient char

1986-11-24

1988-03-22

Barr, Josephine

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252503, 252504, 252506, 252516, 252512, 252518, 252507, 252520, 524404, 524443, H01B 106

Patent

active

047327014

ABSTRACT:
A polymer composition having positive temperature coefficient characteristics is described, comprising 100 parts by weight of a mixture consisting of from 40 to 90% by weight of a crystalline polymer and from 60 to 10% by weight of an electrically conductive powder and from 10 to 300 parts by weight of a semiconductive inorganic substance. This polymer composition can withstand high voltage and when used as a heat generator, produces a uniform distribution of heat and has a long service life. Thus the polymer composition is useful for production of an overcurrent protecting element and a heat generator.

REFERENCES:
patent: 3993602 (1976-11-01), Prochazka
patent: 4209474 (1980-06-01), Prochazka
patent: 4534889 (1985-08-01), van Konynenburg et al.
patent: 4545926 (1985-10-01), Fouts et al.
patent: 4552689 (1985-11-01), Yui et al.
patent: 4555358 (1985-11-01), Matsushita et al.
patent: 4629869 (1986-12-01), Bronnvall
patent: 4633064 (1986-12-01), Atsumi et al.

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