Method of manufacturing an electric resistance element

Details Method of manufacturing an electric resistance element Method of manufacturing an electric resistance element

1988-04-25

1989-07-18

Page, Thurman K.

Coating processes

Electrical product produced

Resistor for current control

427122, 427299, 427386, 4273897, 4273935, 427287, B05T 512

Patent

active

048492515

ABSTRACT:
A method for manufacturing an electric resistance element first prepares carbon particles by thermally treating these particles, such as carbon black at a temperature of at least 300.degree. C. Then a separate mixture of the carbon particles in an epoxy resin is prepared by mixing the carbon particles with a solution of an amino resin to at least partially cause adsorption, occlusion or reaction between the carbon particles and the amino resin. Then the amino resin is polymerized by heating. A further mixture is prepared by mixing a solution of epoxy resin with the first mixture to prepare a paste material which is then coated onto the surface of a substrate. The coating is then thermally cure to form a resistance film on the surface of the substrate.

REFERENCES:
patent: 2825702 (1958-03-01), Silversher
patent: 3342752 (1967-09-01), Wada
patent: 3723607 (1973-03-01), Kalmin

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