Low resistivity ptc compositions

Details Low resistivity ptc compositions Low resistivity ptc compositions

H - Electricity

01

B

356/121, 31/158

H01B 1/24 (2006.01) C08K 3/04 (2006.01) H01C 7/02 (2006.01)

Patent

CA 1142342

ABSTRACT The invention relates to conductive polymer composition which exhibit PTC behavior. The compositions of less than 7 ohm. cm, and which comprise a crystalline polymer and a particulate filler component which comprises carbon black having a particles size, D, which is from 20 to 150 millimicrons and a surface area S in m2/gram such that S/D is not more than 10. The composition preferably has a peak resistivity of at least 1000 ohm. cm and is electrically stable when aged at elevated temperature. The quantity Image is preferably less than 1, especially less than 0.5. Shaped articles of such compositions are prepared by a process in which the carbon black is dispersed in the polymer and the dispersion is then shaped, the total energy used in preparing and shaping the dispersion being 19.5 to 2900 kg. m. cc , preferably 9.5 to 970 kg. m. cc . The composition are particularly useful in circuit protection devices.

340996

Affiliated with

Also associated with

Rating

Low resistivity ptc compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low resistivity ptc compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low resistivity ptc compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-121368