H - Electricity – 01 – C
Patent
H - Electricity
01
C
H01C 7/02 (2006.01) H01B 1/12 (2006.01) H01C 7/12 (2006.01) H05B 3/14 (2006.01)
Patent
CA 2166205
A conductive polymer composition which has a resistivity of less than 10 ohm-cm and which exhibits PTC behavior comprises a polymeric component and a particulate conductive filler. The polymeric component comprises a first crystalline fluorinated polymer having a first melting point Tm1 and a second crystalline fluorinated polymer having a second melting point Tm2 which is from (Tm1 + 25)°C to (Tm1 + 100)°C. The composition exhibits one of a number of characterisitics, including a relatively high PTC anomaly. The composition is useful in circuit protection devices to be used at high ambient conditions.
Composition polymère conductrice présentant une résistivité inférieure à 10 ohm-cm et une caractéristique CTP. La composition comporte un constituant polymère et une charge conductrice particulaire. Le constituant polymère comporte un premier polymère fluoré cristallin ayant un premier point de fusion Tm1 et un second polymère fluoré cristallin ayant un second point de fusion Tm2 compris entre (Tm1 + 25) DEG C et (Tm1 + 100) DEG C. La composition présente une caractéristique parmi une pluralité de caractéristiques, notamment une anomalie CTP relativement élevée. La composition est utilisable dans les dispositifs de protection de circuits utilisés dans des conditions de température ambiante élevée.
Banich Ann
Chan Chi-Ming
Chu Edward F.
Ives Robert
Sunshine Steven
Fetherstonhaugh & Co.
Raychem Corporation
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