Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1993-06-29
1995-09-19
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338 22SD, 252511, H21C 710
Patent
active
054519195
ABSTRACT:
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 T.sub.m1 and a second crystalline fluorinated polymer having a second melting point T.sub.m2 which is from (T.sub.m1 +25).degree. C. to (T.sub.m1 +100).degree. C. The composition exhibits one of a number of characteristics, including a relatively high PTC anomaly. The composition is useful in circuit protection devices to be used at high ambient conditions.
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International Search Report, PCT/US94/07175, filed Jun. 27, 1994.
Banich Ann
Chan Chi-Ming
Chu Edward F.
Ives Robert
Sunshine Steven
Burkard Herbert G.
Gerstner Marguerite E.
Lateef Marvin M.
Raychem Corporation
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