Method for the preparation of a positively temperature-dependent

Details Method for the preparation of a positively temperature-dependent Method for the preparation of a positively temperature-dependent

1989-11-16

1993-11-09

Lieberman, Paul

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252500, 252502, 252504, 252510, H01B 100, H01B 120, H01B 124

Patent

active

052599914

ABSTRACT:
An improved positively temperature-dependent organic resistor, which is basically a composite consisting of a matrix phase of a synthetic resin and a dispersed phase of electroconductive particles, can be prepared by compounding a crystalline synthetic resin, carbon black, an organosilane compound having at least one alkoxy or alkoxy-substituted alkoxy group in a molecule and an organic peroxide, shaping the resin composition into the form of a resistor and heating the shaped body in contact with an aqueous medium containing a hydrolysis-condensation catalyst for the organosilane compound. As compared with resistors prepared by conventional methods, the resistor obtained by the inventive method is highly stable in the resistivity even after many times of repeated voltage loading.

REFERENCES:
patent: 4054540 (1977-10-01), Michalchik
patent: 4315237 (1982-02-01), Middleman et al.
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
patent: 4680140 (1987-07-01), Kageyama
patent: 4806594 (1989-02-01), Gross et al.
patent: 4880577 (1989-11-01), Okita et al.
patent: 5106538 (1992-04-01), Barma et al.
patent: 5106540 (1992-04-01), Barma et al.
patent: 5135980 (1992-08-01), Watanabe
patent: 5143650 (1992-09-01), Gerace et al.

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