High temperature PTC device comprising a conductive polymer comp

Details High temperature PTC device comprising a conductive polymer comp High temperature PTC device comprising a conductive polymer comp

1996-10-08

1998-11-17

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

352511, 352512, 338 20, 338 21, H01B 120, H01B 122, H01B 124, H01C 702

Patent

active

058371648

ABSTRACT:
The present invention provides a high temperature PTC device comprising a conductive polymeric composition that exhibits a switching temperature that falls between 150.degree. C. and 190.degree. C., a PTC effect of at least 10.sup.3 and a low initial resistivity at 25.degree. C. of 10 .OMEGA.cm or less. The conductive polymeric composition comprises a semicrystalline polymer component selected from nylon-12 or nylon-11, and a particulate conductive filler. The composition may include, in addition to the nylon-12 or nylon-11, a second semicrystalline component that preferably is a polyolefin-based or polyester-based thermoplastic elastomer. Crosslinking of the composition enhances thermal and electrical stability.

REFERENCES:
patent: 4237441 (1980-12-01), van Konynenburg et al.
patent: 4238812 (1980-12-01), Middleman et al.
patent: 4304987 (1981-12-01), van Konynenburg
patent: 4329726 (1982-05-01), Middleman et al.
patent: 4420534 (1983-12-01), Matsui et al.
patent: 4457973 (1984-07-01), Matsui et al.
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
patent: 4559112 (1985-12-01), Tamamura et al.
patent: 4575620 (1986-03-01), Ishii et al.
patent: 4591700 (1986-05-01), Sopory
patent: 4624990 (1986-11-01), Lunk et al.
patent: 4636331 (1987-01-01), Sako et al.
patent: 4658121 (1987-04-01), Horsma et al.
patent: 4698488 (1987-10-01), Kishimoto
patent: 4700054 (1987-10-01), Triplett et al.
patent: 4742212 (1988-05-01), Ishii et al.
patent: 4775778 (1988-10-01), van Konynenburg et al.
patent: 4849133 (1989-07-01), Yoshida et al.
patent: 4859836 (1989-08-01), Lunk et al.
patent: 4902562 (1990-02-01), Bahia
patent: 4910389 (1990-03-01), Sherman et al.
patent: 4954695 (1990-09-01), Smith-Johannsen et al.
patent: 5039844 (1991-08-01), Nagahori
patent: 5049852 (1991-09-01), Evans
patent: 5093898 (1992-03-01), van Konynenburg et al.
patent: 5143649 (1992-09-01), Blackledge et al.
patent: 5164133 (1992-11-01), Ishida et al.
patent: 5174924 (1992-12-01), Yamada et al.
patent: 5178797 (1993-01-01), Evans
patent: 5227946 (1993-07-01), Jacobs et al.
patent: 5231371 (1993-07-01), Kobayashi
patent: 5232631 (1993-08-01), Cao et al.
patent: 5246627 (1993-09-01), Heeger et al.
patent: 5250226 (1993-10-01), Oswal
patent: 5250228 (1993-10-01), Baigrie et al.
patent: 5254633 (1993-10-01), Han et al.
patent: 5317061 (1994-05-01), Chu et al.
patent: 5318845 (1994-06-01), Tanaka et al.
patent: 5340499 (1994-08-01), Karna et al.
patent: 5378407 (1995-01-01), Chandler et al.
patent: 5382384 (1995-01-01), Baigrie et al.
patent: 5422462 (1995-06-01), Kishimoto
patent: 5427855 (1995-06-01), Heeger et al.
patent: 5451919 (1995-09-01), Chu et al.
patent: 5491027 (1996-02-01), Heeger et al.
patent: 5498372 (1996-03-01), Hedges
Narkis, M., A. Ram and Z. Stein. Electrical Properties of Carbon Black Filled Crosslinked Polyethylene. Polymer Engineering and Science vol. 21 (16): 1049-1054, Nov. 1981.
Sherman, R.D., L.M. Middleman and S.M. Jacobs. Electron Transport Processes in Conductor-Filled Polymers. Polymer Engineering and Science vol. 23 (1): 36-46, 1983.
Kulwicki, Bernard M. Trends in PTC Resistor Technology. Sample J. (Nov./Dec. 1987): 34-38.
Shrout, T.R., D. Moffatt, W. Huebner. Composite PTCR thermistors utilizing conducting borides, silicides, and carbide powders. J. Material Sci. 26 (1991): 145-154 (No Month).
Ki Hyun Yoon, Yun Woo Nam. Positive termperature coefficient of resistance effects in BaPbO.sub.3 /polyethylene composites. J. Material Sci. 27 (1992): 4051-4055 (No Month).
Wentao Jia and Xinfang Chen. PTC Effect of Polymer Blends Filled with Carbon Black. J. Appl. Polym. Sci. 54 (1994): 1219-1221 (No Month).
Kozake, K., M. Kawaguchi, K. Sato, M. Kuwabara. BaTiO.sub.3 -based positive temperature coefficient of resistivity ceramics with low resisitivities prepared by the oxalate method. J. Material Sci. 30 (1995): 3395-3400 (No Month).
Huybrechts, B., K. Ishizaki, M. Takata. Review: The positive temperature coefficient of resistivity in barium titanate. J. Material Sci. 30 (1995): 2463-2474 (No Month).

Affiliated with

Also associated with

Rating

High temperature PTC device comprising a conductive polymer comp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High temperature PTC device comprising a conductive polymer comp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High temperature PTC device comprising a conductive polymer comp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-880908