Electrical device containing positive temperature coefficient re

Details Electrical device containing positive temperature coefficient re Electrical device containing positive temperature coefficient re

1998-11-05

1999-11-30

Gupta, Yogendra

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252512, 252513, 252514, 338 22R, 338214, 427 58, 427101, H01B 106, H01B 102

Patent

active

059936983

ABSTRACT:
A positive temperature coefficient (PTC) resistor composition, comprising: (a) about 3% to about 75% by weight of a binder resin, (b) about 0.5% to about 70% by weight of a temperature activatable semicrystalline polymer, which is a thermoplastic elastomer (TPE) that melts at a relatively narrow temperature range to change from a crystalline state to an amorphous state, (c) about 10% to about 80% by weight of an electrically conductive material in finely particulated form selected from the group consisting of silver, graphite, graphite/carbon, nickel, copper, silver coated copper, and aluminum, (d) about 0.01% to about 80% by weight of solvent material for the composition.

REFERENCES:
patent: 4545926 (1985-10-01), Fouts et al.
patent: 4560498 (1985-12-01), Horsma et al.
patent: 4658121 (1987-04-01), Horsma et al.
patent: 5304326 (1994-04-01), Goto et al.

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