PTC Compositions and devices comprising them

Details PTC Compositions and devices comprising them PTC Compositions and devices comprising them

1983-02-22

1985-08-13

Barr, Josephine L.

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

20415911, 20415913, 524495, 524496, H01B 106

Patent

active

045348898

ABSTRACT:
Novel conductive polymer compositions which exhibit useful PTC behavior are produced by cross-linking processes. By correlating the polymer, the conductive filler dispersed therein, and the cross-linking conditions, PTC compositions having desired resistance/temperature characteristics can be prepared. In particular the cross-linking can be carried out so as to provide compositions having a switching temperature around the cross-linking temperature. The invention is applicable to both elastomeric and thermoplastic polymers, and provides for the first time a method of making PTC compositions exhibiting useful PTC behavior from elastomers.

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601639, 8-4-75, Horsma et al.
Brit. J. Appl. Phys. (J. Phys D) 1969, Ser. 2, vol. 2, 567-576 (1969), Carley Read et al.
Koll. Zh. 14 (No. 5), 346 (Dogadkin et al.).
Soviet Plastics, No. 4 (1967), pp. 46-49 (Galkina et al.).

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