Increasing magnetic particle concentration in magnetic coatings

Details Increasing magnetic particle concentration in magnetic coatings Increasing magnetic particle concentration in magnetic coatings

1982-08-30

1984-05-29

Lusignan, Michael R.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 47, 427 48, 427127, 427128, 427129, 427130, 427131, 427219, 427299, B05D 106, B05D 512

Patent

active

044514956

ABSTRACT:
A monolayer magnetic coating is prepared by applying magnetic particles which have an electrostatic charge in an aqueous environment to an active layer on a substrate, the active layer having an electrostatic charge in an aqueous environment opposite to the charge on the magnetic particles so that the particles bond to the active layer. The concentration of the electrolyte in which the charged particles are dispersed is adjusted to reduce the coulombic repulsive forces between the particles, permitting them to move close together and thereby increasing the magnetic particle packing in the resultant magnetic coating.

REFERENCES:
patent: 3947502 (1976-03-01), Leitner et al.
patent: 4280918 (1981-07-01), Homola et al.
patent: 4333961 (1982-07-01), Bruce et al.

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