Conductive polymer compositions

Details Conductive polymer compositions Conductive polymer compositions

1988-06-03

1990-03-20

Walberg, Teresa J.

Electric heating

Heating devices

With heating unit structure

219504, 219505, 219549, 219553, 252503, 252511, H05B 310, H01B 106

Patent

active

049103890

ABSTRACT:
A conductive polymer composition which exhibits PTC behavior comprises a crystalline organic polymer, carbon black, and a high resistivity particulate filler. The high resistivity filler is semiconductive and has a resistivity at least 100 times that of the carbon black. Compositions of the invention exhibit good resistance stability when exposed to thermal cycling. They are useful in electrical devices requiring compositions with high resistivity.

REFERENCES:
patent: 4107092 (1978-08-01), Carnahan
patent: 4250398 (1981-02-01), Ellis et al.
patent: 4277673 (1981-07-01), Kelly
patent: 4304987 (1981-12-01), Konynenburg
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
patent: 4731199 (1988-03-01), Matsuo et al.
patent: 4732701 (1988-03-01), Nishii et al.

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