PTC composition and PTC device comprising the same

Details PTC composition and PTC device comprising the same PTC composition and PTC device comprising the same

2006-02-21

2006-02-21

Kopec, Mark (Department: 1751)

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

C252S512000, C252S514000, C338S0220SD

Reexamination Certificate

active

07001538

ABSTRACT:
The present invention relates to a conductive polymer composition having PTC properties, that is, a PTC composition, and a PTC device comprised thereof, in particular, it relates to a PTC composition and a PTC device comprising thereof, wherein the PTC composition comprises: a) at least one crystalline thermoplastic olefin-based polymer and at least one rubber-based polymer resin containing unsaturated group; and b) conductive particles dispersed in a polymer matrix formed of component a). The PTC device comprising the PTC composition makes it possible to construct circuit protecting devices which can stably maintain their initial resistance value in spite of repeated current cycling by short-circuit.

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patent: 6051655 (2000-04-01), Nakano et al.
patent: 6828362 (2004-12-01), Lee et al.
patent: 5-109502 (1993-04-01), None
KR 1999-184320 B1 (Dai-Ichi Kogyo Seiya Ku Co., Ltd.) Dec. 18, 1998.
KR 2001-43781 A (Nisshin Bo Industries, Inc.) May 25, 2001.
JP 08-120182 A (Nok Corp) May 14, 1996.

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