PTC composition and PTC device comprising the same
AssigneeShinwha Intertek Corp
InventorsYong-In Lee, Hyun-Nam Cho, Jong-Hawk Kim
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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.
Claims12
A conductive polymer composition having PTC properties comprising:
- (a) at least one crystalline thermoplastic olefin-based polymer and at least one rubber-based polymer resin containing unsaturated group selected from the group consisting of natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, chloroprene rubber, nitrile-based rubber, carboxylated nitrile-based rubber, sulfonated ethyl-propylene-diene rubber, butadiene (meth) acrylic acid rubber resin, polynorbonene, polypentenamer, polyoctenamer, styrene linear and branched copolymer rubber, and mixtures thereof;
- and (b) conductive particles dispersed in a polymer matrix formed of component (a).
Dependencies are inferred from the claim text.